1 // SPDX-License-Identifier: GPL-2.0-or-later
3 /***************************************************************************
4 * Generic Xtensa target API for OpenOCD *
5 * Copyright (C) 2020-2022 Cadence Design Systems, Inc. *
6 * Copyright (C) 2016-2019 Espressif Systems Ltd. *
7 * Derived from esp108.c *
8 * Author: Angus Gratton gus@projectgus.com *
9 ***************************************************************************/
16 #include <helper/time_support.h>
17 #include <helper/align.h>
18 #include <target/register.h>
20 #include "xtensa_chip.h"
23 /* Swap 4-bit Xtensa opcodes and fields */
24 #define XT_NIBSWAP8(V) \
25 ((((V) & 0x0F) << 4) \
26 | (((V) & 0xF0) >> 4))
28 #define XT_NIBSWAP16(V) \
29 ((((V) & 0x000F) << 12) \
30 | (((V) & 0x00F0) << 4) \
31 | (((V) & 0x0F00) >> 4) \
32 | (((V) & 0xF000) >> 12))
34 #define XT_NIBSWAP24(V) \
35 ((((V) & 0x00000F) << 20) \
36 | (((V) & 0x0000F0) << 12) \
37 | (((V) & 0x000F00) << 4) \
38 | (((V) & 0x00F000) >> 4) \
39 | (((V) & 0x0F0000) >> 12) \
40 | (((V) & 0xF00000) >> 20))
43 * Instruction formatting converted from little-endian inputs
44 * and shifted to the MSB-side of DIR for BE systems.
46 #define _XT_INS_FORMAT_RSR(X, OPCODE, SR, T) \
47 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
48 | (((T) & 0x0F) << 16) \
49 | (((SR) & 0xFF) << 8)) << 8 \
51 | (((SR) & 0xFF) << 8) \
52 | (((T) & 0x0F) << 4))
54 #define _XT_INS_FORMAT_RRR(X, OPCODE, ST, R) \
55 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
56 | ((XT_NIBSWAP8((ST) & 0xFF)) << 12) \
57 | (((R) & 0x0F) << 8)) << 8 \
59 | (((ST) & 0xFF) << 4) \
60 | (((R) & 0x0F) << 12))
62 #define _XT_INS_FORMAT_RRRN(X, OPCODE, S, T, IMM4) \
63 (XT_ISBE(X) ? (XT_NIBSWAP16(OPCODE) \
64 | (((T) & 0x0F) << 8) \
65 | (((S) & 0x0F) << 4) \
66 | ((IMM4) & 0x0F)) << 16 \
68 | (((T) & 0x0F) << 4) \
69 | (((S) & 0x0F) << 8) \
70 | (((IMM4) & 0x0F) << 12))
72 #define _XT_INS_FORMAT_RRI8(X, OPCODE, R, S, T, IMM8) \
73 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
74 | (((T) & 0x0F) << 16) \
75 | (((S) & 0x0F) << 12) \
76 | (((R) & 0x0F) << 8) \
77 | ((IMM8) & 0xFF)) << 8 \
79 | (((IMM8) & 0xFF) << 16) \
80 | (((R) & 0x0F) << 12) \
81 | (((S) & 0x0F) << 8) \
82 | (((T) & 0x0F) << 4))
84 #define _XT_INS_FORMAT_RRI4(X, OPCODE, IMM4, R, S, T) \
85 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
86 | (((T) & 0x0F) << 16) \
87 | (((S) & 0x0F) << 12) \
88 | (((R) & 0x0F) << 8)) << 8 \
91 | (((IMM4) & 0x0F) << 20) \
92 | (((R) & 0x0F) << 12) \
93 | (((S) & 0x0F) << 8) \
94 | (((T) & 0x0F) << 4))
96 /* Xtensa processor instruction opcodes
98 /* "Return From Debug Operation" to Normal */
99 #define XT_INS_RFDO(X) (XT_ISBE(X) ? 0x000e1f << 8 : 0xf1e000)
100 /* "Return From Debug and Dispatch" - allow sw debugging stuff to take over */
101 #define XT_INS_RFDD(X) (XT_ISBE(X) ? 0x010e1f << 8 : 0xf1e010)
103 /* Load to DDR register, increase addr register */
104 #define XT_INS_LDDR32P(X, S) (XT_ISBE(X) ? (0x0E0700 | ((S) << 12)) << 8 : (0x0070E0 | ((S) << 8)))
105 /* Store from DDR register, increase addr register */
106 #define XT_INS_SDDR32P(X, S) (XT_ISBE(X) ? (0x0F0700 | ((S) << 12)) << 8 : (0x0070F0 | ((S) << 8)))
108 /* Load 32-bit Indirect from A(S)+4*IMM8 to A(T) */
109 #define XT_INS_L32I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x002002, 0, S, T, IMM8)
110 /* Load 16-bit Unsigned from A(S)+2*IMM8 to A(T) */
111 #define XT_INS_L16UI(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x001002, 0, S, T, IMM8)
112 /* Load 8-bit Unsigned from A(S)+IMM8 to A(T) */
113 #define XT_INS_L8UI(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x000002, 0, S, T, IMM8)
115 /* Store 32-bit Indirect to A(S)+4*IMM8 from A(T) */
116 #define XT_INS_S32I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x006002, 0, S, T, IMM8)
117 /* Store 16-bit to A(S)+2*IMM8 from A(T) */
118 #define XT_INS_S16I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x005002, 0, S, T, IMM8)
119 /* Store 8-bit to A(S)+IMM8 from A(T) */
120 #define XT_INS_S8I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x004002, 0, S, T, IMM8)
122 /* Cache Instructions */
123 #define XT_INS_IHI(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x0070E2, 0, S, 0, IMM8)
124 #define XT_INS_DHWBI(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x007052, 0, S, 0, IMM8)
125 #define XT_INS_DHWB(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x007042, 0, S, 0, IMM8)
126 #define XT_INS_ISYNC(X) (XT_ISBE(X) ? 0x000200 << 8 : 0x002000)
128 /* Control Instructions */
129 #define XT_INS_JX(X, S) (XT_ISBE(X) ? (0x050000 | ((S) << 12)) : (0x0000a0 | ((S) << 8)))
130 #define XT_INS_CALL0(X, IMM18) (XT_ISBE(X) ? (0x500000 | ((IMM18) & 0x3ffff)) : (0x000005 | (((IMM18) & 0x3ffff) << 6)))
132 /* Read Special Register */
133 #define XT_INS_RSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x030000, SR, T)
134 /* Write Special Register */
135 #define XT_INS_WSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x130000, SR, T)
136 /* Swap Special Register */
137 #define XT_INS_XSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x610000, SR, T)
139 /* Rotate Window by (-8..7) */
140 #define XT_INS_ROTW(X, N) (XT_ISBE(X) ? ((0x000804) | (((N) & 15) << 16)) << 8 : ((0x408000) | (((N) & 15) << 4)))
142 /* Read User Register */
143 #define XT_INS_RUR(X, UR, T) _XT_INS_FORMAT_RRR(X, 0xE30000, UR, T)
144 /* Write User Register */
145 #define XT_INS_WUR(X, UR, T) _XT_INS_FORMAT_RSR(X, 0xF30000, UR, T)
147 /* Read Floating-Point Register */
148 #define XT_INS_RFR(X, FR, T) _XT_INS_FORMAT_RRR(X, 0xFA0000, ((FR << 4) | 0x4), T)
149 /* Write Floating-Point Register */
150 #define XT_INS_WFR(X, FR, T) _XT_INS_FORMAT_RRR(X, 0xFA0000, ((T << 4) | 0x5), FR)
152 #define XT_INS_L32E(X, R, S, T) _XT_INS_FORMAT_RRI4(X, 0x090000, 0, R, S, T)
153 #define XT_INS_S32E(X, R, S, T) _XT_INS_FORMAT_RRI4(X, 0x490000, 0, R, S, T)
154 #define XT_INS_L32E_S32E_MASK(X) (XT_ISBE(X) ? 0xF000FF << 8 : 0xFF000F)
156 #define XT_INS_RFWO(X) (XT_ISBE(X) ? 0x004300 << 8 : 0x003400)
157 #define XT_INS_RFWU(X) (XT_ISBE(X) ? 0x005300 << 8 : 0x003500)
158 #define XT_INS_RFWO_RFWU_MASK(X) (XT_ISBE(X) ? 0xFFFFFF << 8 : 0xFFFFFF)
160 #define XT_WATCHPOINTS_NUM_MAX 2
162 /* Special register number macro for DDR, PS, WB, A3, A4 registers.
163 * These get used a lot so making a shortcut is useful.
165 #define XT_SR_DDR (xtensa_regs[XT_REG_IDX_DDR].reg_num)
166 #define XT_SR_PS (xtensa_regs[XT_REG_IDX_PS].reg_num)
167 #define XT_SR_WB (xtensa_regs[XT_REG_IDX_WINDOWBASE].reg_num)
168 #define XT_REG_A0 (xtensa_regs[XT_REG_IDX_AR0].reg_num)
169 #define XT_REG_A3 (xtensa_regs[XT_REG_IDX_AR3].reg_num)
170 #define XT_REG_A4 (xtensa_regs[XT_REG_IDX_AR4].reg_num)
172 #define XT_PS_REG_NUM (0xe6U)
173 #define XT_EPS_REG_NUM_BASE (0xc0U) /* (EPS2 - 2), for adding DBGLEVEL */
174 #define XT_EPC_REG_NUM_BASE (0xb0U) /* (EPC1 - 1), for adding DBGLEVEL */
175 #define XT_PC_REG_NUM_VIRTUAL (0xffU) /* Marker for computing PC (EPC[DBGLEVEL) */
176 #define XT_PC_DBREG_NUM_BASE (0x20U) /* External (i.e., GDB) access */
177 #define XT_NX_IBREAKC_BASE (0xc0U) /* (IBREAKC0..IBREAKC1) for NX */
179 #define XT_SW_BREAKPOINTS_MAX_NUM 32
180 #define XT_HW_IBREAK_MAX_NUM 2
181 #define XT_HW_DBREAK_MAX_NUM 2
183 struct xtensa_reg_desc xtensa_regs
[XT_NUM_REGS
] = {
184 XT_MK_REG_DESC("pc", XT_PC_REG_NUM_VIRTUAL
, XT_REG_SPECIAL
, 0),
185 XT_MK_REG_DESC("ar0", 0x00, XT_REG_GENERAL
, 0),
186 XT_MK_REG_DESC("ar1", 0x01, XT_REG_GENERAL
, 0),
187 XT_MK_REG_DESC("ar2", 0x02, XT_REG_GENERAL
, 0),
188 XT_MK_REG_DESC("ar3", 0x03, XT_REG_GENERAL
, 0),
189 XT_MK_REG_DESC("ar4", 0x04, XT_REG_GENERAL
, 0),
190 XT_MK_REG_DESC("ar5", 0x05, XT_REG_GENERAL
, 0),
191 XT_MK_REG_DESC("ar6", 0x06, XT_REG_GENERAL
, 0),
192 XT_MK_REG_DESC("ar7", 0x07, XT_REG_GENERAL
, 0),
193 XT_MK_REG_DESC("ar8", 0x08, XT_REG_GENERAL
, 0),
194 XT_MK_REG_DESC("ar9", 0x09, XT_REG_GENERAL
, 0),
195 XT_MK_REG_DESC("ar10", 0x0A, XT_REG_GENERAL
, 0),
196 XT_MK_REG_DESC("ar11", 0x0B, XT_REG_GENERAL
, 0),
197 XT_MK_REG_DESC("ar12", 0x0C, XT_REG_GENERAL
, 0),
198 XT_MK_REG_DESC("ar13", 0x0D, XT_REG_GENERAL
, 0),
199 XT_MK_REG_DESC("ar14", 0x0E, XT_REG_GENERAL
, 0),
200 XT_MK_REG_DESC("ar15", 0x0F, XT_REG_GENERAL
, 0),
201 XT_MK_REG_DESC("ar16", 0x10, XT_REG_GENERAL
, 0),
202 XT_MK_REG_DESC("ar17", 0x11, XT_REG_GENERAL
, 0),
203 XT_MK_REG_DESC("ar18", 0x12, XT_REG_GENERAL
, 0),
204 XT_MK_REG_DESC("ar19", 0x13, XT_REG_GENERAL
, 0),
205 XT_MK_REG_DESC("ar20", 0x14, XT_REG_GENERAL
, 0),
206 XT_MK_REG_DESC("ar21", 0x15, XT_REG_GENERAL
, 0),
207 XT_MK_REG_DESC("ar22", 0x16, XT_REG_GENERAL
, 0),
208 XT_MK_REG_DESC("ar23", 0x17, XT_REG_GENERAL
, 0),
209 XT_MK_REG_DESC("ar24", 0x18, XT_REG_GENERAL
, 0),
210 XT_MK_REG_DESC("ar25", 0x19, XT_REG_GENERAL
, 0),
211 XT_MK_REG_DESC("ar26", 0x1A, XT_REG_GENERAL
, 0),
212 XT_MK_REG_DESC("ar27", 0x1B, XT_REG_GENERAL
, 0),
213 XT_MK_REG_DESC("ar28", 0x1C, XT_REG_GENERAL
, 0),
214 XT_MK_REG_DESC("ar29", 0x1D, XT_REG_GENERAL
, 0),
215 XT_MK_REG_DESC("ar30", 0x1E, XT_REG_GENERAL
, 0),
216 XT_MK_REG_DESC("ar31", 0x1F, XT_REG_GENERAL
, 0),
217 XT_MK_REG_DESC("ar32", 0x20, XT_REG_GENERAL
, 0),
218 XT_MK_REG_DESC("ar33", 0x21, XT_REG_GENERAL
, 0),
219 XT_MK_REG_DESC("ar34", 0x22, XT_REG_GENERAL
, 0),
220 XT_MK_REG_DESC("ar35", 0x23, XT_REG_GENERAL
, 0),
221 XT_MK_REG_DESC("ar36", 0x24, XT_REG_GENERAL
, 0),
222 XT_MK_REG_DESC("ar37", 0x25, XT_REG_GENERAL
, 0),
223 XT_MK_REG_DESC("ar38", 0x26, XT_REG_GENERAL
, 0),
224 XT_MK_REG_DESC("ar39", 0x27, XT_REG_GENERAL
, 0),
225 XT_MK_REG_DESC("ar40", 0x28, XT_REG_GENERAL
, 0),
226 XT_MK_REG_DESC("ar41", 0x29, XT_REG_GENERAL
, 0),
227 XT_MK_REG_DESC("ar42", 0x2A, XT_REG_GENERAL
, 0),
228 XT_MK_REG_DESC("ar43", 0x2B, XT_REG_GENERAL
, 0),
229 XT_MK_REG_DESC("ar44", 0x2C, XT_REG_GENERAL
, 0),
230 XT_MK_REG_DESC("ar45", 0x2D, XT_REG_GENERAL
, 0),
231 XT_MK_REG_DESC("ar46", 0x2E, XT_REG_GENERAL
, 0),
232 XT_MK_REG_DESC("ar47", 0x2F, XT_REG_GENERAL
, 0),
233 XT_MK_REG_DESC("ar48", 0x30, XT_REG_GENERAL
, 0),
234 XT_MK_REG_DESC("ar49", 0x31, XT_REG_GENERAL
, 0),
235 XT_MK_REG_DESC("ar50", 0x32, XT_REG_GENERAL
, 0),
236 XT_MK_REG_DESC("ar51", 0x33, XT_REG_GENERAL
, 0),
237 XT_MK_REG_DESC("ar52", 0x34, XT_REG_GENERAL
, 0),
238 XT_MK_REG_DESC("ar53", 0x35, XT_REG_GENERAL
, 0),
239 XT_MK_REG_DESC("ar54", 0x36, XT_REG_GENERAL
, 0),
240 XT_MK_REG_DESC("ar55", 0x37, XT_REG_GENERAL
, 0),
241 XT_MK_REG_DESC("ar56", 0x38, XT_REG_GENERAL
, 0),
242 XT_MK_REG_DESC("ar57", 0x39, XT_REG_GENERAL
, 0),
243 XT_MK_REG_DESC("ar58", 0x3A, XT_REG_GENERAL
, 0),
244 XT_MK_REG_DESC("ar59", 0x3B, XT_REG_GENERAL
, 0),
245 XT_MK_REG_DESC("ar60", 0x3C, XT_REG_GENERAL
, 0),
246 XT_MK_REG_DESC("ar61", 0x3D, XT_REG_GENERAL
, 0),
247 XT_MK_REG_DESC("ar62", 0x3E, XT_REG_GENERAL
, 0),
248 XT_MK_REG_DESC("ar63", 0x3F, XT_REG_GENERAL
, 0),
249 XT_MK_REG_DESC("windowbase", 0x48, XT_REG_SPECIAL
, 0),
250 XT_MK_REG_DESC("windowstart", 0x49, XT_REG_SPECIAL
, 0),
251 XT_MK_REG_DESC("ps", XT_PS_REG_NUM
, XT_REG_SPECIAL
, 0), /* PS (not mapped through EPS[]) */
252 XT_MK_REG_DESC("ibreakenable", 0x60, XT_REG_SPECIAL
, 0),
253 XT_MK_REG_DESC("ddr", 0x68, XT_REG_DEBUG
, XT_REGF_NOREAD
),
254 XT_MK_REG_DESC("ibreaka0", 0x80, XT_REG_SPECIAL
, 0),
255 XT_MK_REG_DESC("ibreaka1", 0x81, XT_REG_SPECIAL
, 0),
256 XT_MK_REG_DESC("dbreaka0", 0x90, XT_REG_SPECIAL
, 0),
257 XT_MK_REG_DESC("dbreaka1", 0x91, XT_REG_SPECIAL
, 0),
258 XT_MK_REG_DESC("dbreakc0", 0xA0, XT_REG_SPECIAL
, 0),
259 XT_MK_REG_DESC("dbreakc1", 0xA1, XT_REG_SPECIAL
, 0),
260 XT_MK_REG_DESC("cpenable", 0xE0, XT_REG_SPECIAL
, 0),
261 XT_MK_REG_DESC("exccause", 0xE8, XT_REG_SPECIAL
, 0),
262 XT_MK_REG_DESC("debugcause", 0xE9, XT_REG_SPECIAL
, 0),
263 XT_MK_REG_DESC("icount", 0xEC, XT_REG_SPECIAL
, 0),
264 XT_MK_REG_DESC("icountlevel", 0xED, XT_REG_SPECIAL
, 0),
266 /* WARNING: For these registers, regnum points to the
267 * index of the corresponding ARx registers, NOT to
268 * the processor register number! */
269 XT_MK_REG_DESC("a0", XT_REG_IDX_AR0
, XT_REG_RELGEN
, 0),
270 XT_MK_REG_DESC("a1", XT_REG_IDX_AR1
, XT_REG_RELGEN
, 0),
271 XT_MK_REG_DESC("a2", XT_REG_IDX_AR2
, XT_REG_RELGEN
, 0),
272 XT_MK_REG_DESC("a3", XT_REG_IDX_AR3
, XT_REG_RELGEN
, 0),
273 XT_MK_REG_DESC("a4", XT_REG_IDX_AR4
, XT_REG_RELGEN
, 0),
274 XT_MK_REG_DESC("a5", XT_REG_IDX_AR5
, XT_REG_RELGEN
, 0),
275 XT_MK_REG_DESC("a6", XT_REG_IDX_AR6
, XT_REG_RELGEN
, 0),
276 XT_MK_REG_DESC("a7", XT_REG_IDX_AR7
, XT_REG_RELGEN
, 0),
277 XT_MK_REG_DESC("a8", XT_REG_IDX_AR8
, XT_REG_RELGEN
, 0),
278 XT_MK_REG_DESC("a9", XT_REG_IDX_AR9
, XT_REG_RELGEN
, 0),
279 XT_MK_REG_DESC("a10", XT_REG_IDX_AR10
, XT_REG_RELGEN
, 0),
280 XT_MK_REG_DESC("a11", XT_REG_IDX_AR11
, XT_REG_RELGEN
, 0),
281 XT_MK_REG_DESC("a12", XT_REG_IDX_AR12
, XT_REG_RELGEN
, 0),
282 XT_MK_REG_DESC("a13", XT_REG_IDX_AR13
, XT_REG_RELGEN
, 0),
283 XT_MK_REG_DESC("a14", XT_REG_IDX_AR14
, XT_REG_RELGEN
, 0),
284 XT_MK_REG_DESC("a15", XT_REG_IDX_AR15
, XT_REG_RELGEN
, 0),
288 * Types of memory used at xtensa target
290 enum xtensa_mem_region_type
{
291 XTENSA_MEM_REG_IROM
= 0x0,
300 /* Register definition as union for list allocation */
301 union xtensa_reg_val_u
{
302 xtensa_reg_val_t val
;
306 static const struct xtensa_keyval_info_s xt_qerr
[XT_QERR_NUM
] = {
307 { .chrval
= "E00", .intval
= ERROR_FAIL
},
308 { .chrval
= "E01", .intval
= ERROR_FAIL
},
309 { .chrval
= "E02", .intval
= ERROR_COMMAND_ARGUMENT_INVALID
},
310 { .chrval
= "E03", .intval
= ERROR_FAIL
},
313 /* Set to true for extra debug logging */
314 static const bool xtensa_extra_debug_log
;
317 * Gets a config for the specific mem type
319 static inline const struct xtensa_local_mem_config
*xtensa_get_mem_config(
320 struct xtensa
*xtensa
,
321 enum xtensa_mem_region_type type
)
324 case XTENSA_MEM_REG_IROM
:
325 return &xtensa
->core_config
->irom
;
326 case XTENSA_MEM_REG_IRAM
:
327 return &xtensa
->core_config
->iram
;
328 case XTENSA_MEM_REG_DROM
:
329 return &xtensa
->core_config
->drom
;
330 case XTENSA_MEM_REG_DRAM
:
331 return &xtensa
->core_config
->dram
;
332 case XTENSA_MEM_REG_SRAM
:
333 return &xtensa
->core_config
->sram
;
334 case XTENSA_MEM_REG_SROM
:
335 return &xtensa
->core_config
->srom
;
342 * Extracts an exact xtensa_local_mem_region_config from xtensa_local_mem_config
343 * for a given address
344 * Returns NULL if nothing found
346 static inline const struct xtensa_local_mem_region_config
*xtensa_memory_region_find(
347 const struct xtensa_local_mem_config
*mem
,
348 target_addr_t address
)
350 for (unsigned int i
= 0; i
< mem
->count
; i
++) {
351 const struct xtensa_local_mem_region_config
*region
= &mem
->regions
[i
];
352 if (address
>= region
->base
&& address
< (region
->base
+ region
->size
))
359 * Returns a corresponding xtensa_local_mem_region_config from the xtensa target
360 * for a given address
361 * Returns NULL if nothing found
363 static inline const struct xtensa_local_mem_region_config
*xtensa_target_memory_region_find(
364 struct xtensa
*xtensa
,
365 target_addr_t address
)
367 const struct xtensa_local_mem_region_config
*result
;
368 const struct xtensa_local_mem_config
*mcgf
;
369 for (unsigned int mtype
= 0; mtype
< XTENSA_MEM_REGS_NUM
; mtype
++) {
370 mcgf
= xtensa_get_mem_config(xtensa
, mtype
);
371 result
= xtensa_memory_region_find(mcgf
, address
);
378 static inline bool xtensa_is_cacheable(const struct xtensa_cache_config
*cache
,
379 const struct xtensa_local_mem_config
*mem
,
380 target_addr_t address
)
384 return xtensa_memory_region_find(mem
, address
);
387 static inline bool xtensa_is_icacheable(struct xtensa
*xtensa
, target_addr_t address
)
389 return xtensa_is_cacheable(&xtensa
->core_config
->icache
, &xtensa
->core_config
->iram
, address
) ||
390 xtensa_is_cacheable(&xtensa
->core_config
->icache
, &xtensa
->core_config
->irom
, address
) ||
391 xtensa_is_cacheable(&xtensa
->core_config
->icache
, &xtensa
->core_config
->sram
, address
) ||
392 xtensa_is_cacheable(&xtensa
->core_config
->icache
, &xtensa
->core_config
->srom
, address
);
395 static inline bool xtensa_is_dcacheable(struct xtensa
*xtensa
, target_addr_t address
)
397 return xtensa_is_cacheable(&xtensa
->core_config
->dcache
, &xtensa
->core_config
->dram
, address
) ||
398 xtensa_is_cacheable(&xtensa
->core_config
->dcache
, &xtensa
->core_config
->drom
, address
) ||
399 xtensa_is_cacheable(&xtensa
->core_config
->dcache
, &xtensa
->core_config
->sram
, address
) ||
400 xtensa_is_cacheable(&xtensa
->core_config
->dcache
, &xtensa
->core_config
->srom
, address
);
403 static int xtensa_core_reg_get(struct reg
*reg
)
405 /* We don't need this because we read all registers on halt anyway. */
406 struct xtensa
*xtensa
= (struct xtensa
*)reg
->arch_info
;
407 struct target
*target
= xtensa
->target
;
409 if (target
->state
!= TARGET_HALTED
)
410 return ERROR_TARGET_NOT_HALTED
;
412 if (strncmp(reg
->name
, "?0x", 3) == 0) {
413 unsigned int regnum
= strtoul(reg
->name
+ 1, NULL
, 0);
414 LOG_WARNING("Read unknown register 0x%04x ignored", regnum
);
417 return ERROR_COMMAND_ARGUMENT_INVALID
;
422 static int xtensa_core_reg_set(struct reg
*reg
, uint8_t *buf
)
424 struct xtensa
*xtensa
= (struct xtensa
*)reg
->arch_info
;
425 struct target
*target
= xtensa
->target
;
427 assert(reg
->size
<= 64 && "up to 64-bit regs are supported only!");
428 if (target
->state
!= TARGET_HALTED
)
429 return ERROR_TARGET_NOT_HALTED
;
432 if (strncmp(reg
->name
, "?0x", 3) == 0) {
433 unsigned int regnum
= strtoul(reg
->name
+ 1, NULL
, 0);
434 LOG_WARNING("Write unknown register 0x%04x ignored", regnum
);
437 return ERROR_COMMAND_ARGUMENT_INVALID
;
440 buf_cpy(buf
, reg
->value
, reg
->size
);
442 if (xtensa
->core_config
->windowed
) {
443 /* If the user updates a potential scratch register, track for conflicts */
444 for (enum xtensa_ar_scratch_set_e s
= 0; s
< XT_AR_SCRATCH_NUM
; s
++) {
445 if (strcmp(reg
->name
, xtensa
->scratch_ars
[s
].chrval
) == 0) {
446 LOG_DEBUG("Scratch reg %s [0x%08" PRIx32
"] set from gdb", reg
->name
,
447 buf_get_u32(reg
->value
, 0, 32));
448 LOG_DEBUG("scratch_ars mapping: a3/%s, a4/%s",
449 xtensa
->scratch_ars
[XT_AR_SCRATCH_AR3
].chrval
,
450 xtensa
->scratch_ars
[XT_AR_SCRATCH_AR4
].chrval
);
451 xtensa
->scratch_ars
[s
].intval
= true;
462 static const struct reg_arch_type xtensa_reg_type
= {
463 .get
= xtensa_core_reg_get
,
464 .set
= xtensa_core_reg_set
,
467 /* Convert a register index that's indexed relative to windowbase, to the real address. */
468 static enum xtensa_reg_id
xtensa_windowbase_offset_to_canonical(struct xtensa
*xtensa
,
469 enum xtensa_reg_id reg_idx
,
473 if (reg_idx
>= XT_REG_IDX_AR0
&& reg_idx
<= XT_REG_IDX_ARLAST
) {
474 idx
= reg_idx
- XT_REG_IDX_AR0
;
475 } else if (reg_idx
>= XT_REG_IDX_A0
&& reg_idx
<= XT_REG_IDX_A15
) {
476 idx
= reg_idx
- XT_REG_IDX_A0
;
478 LOG_ERROR("Error: can't convert register %d to non-windowbased register!", reg_idx
);
481 /* Each windowbase value represents 4 registers on LX and 8 on NX */
482 int base_inc
= (xtensa
->core_config
->core_type
== XT_LX
) ? 4 : 8;
483 return ((idx
+ windowbase
* base_inc
) & (xtensa
->core_config
->aregs_num
- 1)) + XT_REG_IDX_AR0
;
486 static enum xtensa_reg_id
xtensa_canonical_to_windowbase_offset(struct xtensa
*xtensa
,
487 enum xtensa_reg_id reg_idx
,
490 return xtensa_windowbase_offset_to_canonical(xtensa
, reg_idx
, -windowbase
);
493 static void xtensa_mark_register_dirty(struct xtensa
*xtensa
, enum xtensa_reg_id reg_idx
)
495 struct reg
*reg_list
= xtensa
->core_cache
->reg_list
;
496 reg_list
[reg_idx
].dirty
= true;
499 static void xtensa_queue_exec_ins(struct xtensa
*xtensa
, uint32_t ins
)
501 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DIR0EXEC
, ins
);
504 static void xtensa_queue_exec_ins_wide(struct xtensa
*xtensa
, uint8_t *ops
, uint8_t oplen
)
506 const int max_oplen
= 64; /* 8 DIRx regs: max width 64B */
507 if ((oplen
> 0) && (oplen
<= max_oplen
)) {
508 uint8_t ops_padded
[max_oplen
];
509 memcpy(ops_padded
, ops
, oplen
);
510 memset(ops_padded
+ oplen
, 0, max_oplen
- oplen
);
511 unsigned int oplenw
= DIV_ROUND_UP(oplen
, sizeof(uint32_t));
512 for (int32_t i
= oplenw
- 1; i
> 0; i
--)
513 xtensa_queue_dbg_reg_write(xtensa
,
515 target_buffer_get_u32(xtensa
->target
, &ops_padded
[sizeof(uint32_t)*i
]));
516 /* Write DIR0EXEC last */
517 xtensa_queue_dbg_reg_write(xtensa
,
519 target_buffer_get_u32(xtensa
->target
, &ops_padded
[0]));
523 static int xtensa_queue_pwr_reg_write(struct xtensa
*xtensa
, unsigned int reg
, uint32_t data
)
525 struct xtensa_debug_module
*dm
= &xtensa
->dbg_mod
;
526 return dm
->pwr_ops
->queue_reg_write(dm
, reg
, data
);
529 /* NOTE: Assumes A3 has already been saved */
530 static int xtensa_window_state_save(struct target
*target
, uint32_t *woe
)
532 struct xtensa
*xtensa
= target_to_xtensa(target
);
533 unsigned int woe_sr
= (xtensa
->core_config
->core_type
== XT_LX
) ? XT_SR_PS
: XT_SR_WB
;
537 if (xtensa
->core_config
->windowed
) {
538 /* Save PS (LX) or WB (NX) and disable window overflow exceptions prior to AR save */
539 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, woe_sr
, XT_REG_A3
));
540 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
541 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, woe_buf
);
542 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
543 if (res
!= ERROR_OK
) {
544 LOG_TARGET_ERROR(target
, "Failed to read %s (%d)!",
545 (woe_sr
== XT_SR_PS
) ? "PS" : "WB", res
);
548 xtensa_core_status_check(target
);
549 *woe
= buf_get_u32(woe_buf
, 0, 32);
550 woe_dis
= *woe
& ~((woe_sr
== XT_SR_PS
) ? XT_PS_WOE_MSK
: XT_WB_S_MSK
);
551 LOG_TARGET_DEBUG(target
, "Clearing %s (0x%08" PRIx32
" -> 0x%08" PRIx32
")",
552 (woe_sr
== XT_SR_PS
) ? "PS.WOE" : "WB.S", *woe
, woe_dis
);
553 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, woe_dis
);
554 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
555 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, woe_sr
, XT_REG_A3
));
560 /* NOTE: Assumes A3 has already been saved */
561 static void xtensa_window_state_restore(struct target
*target
, uint32_t woe
)
563 struct xtensa
*xtensa
= target_to_xtensa(target
);
564 unsigned int woe_sr
= (xtensa
->core_config
->core_type
== XT_LX
) ? XT_SR_PS
: XT_SR_WB
;
565 if (xtensa
->core_config
->windowed
) {
566 /* Restore window overflow exception state */
567 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, woe
);
568 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
569 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, woe_sr
, XT_REG_A3
));
570 LOG_TARGET_DEBUG(target
, "Restored %s (0x%08" PRIx32
")",
571 (woe_sr
== XT_SR_PS
) ? "PS.WOE" : "WB", woe
);
575 static bool xtensa_reg_is_readable(int flags
, int cpenable
)
577 if (flags
& XT_REGF_NOREAD
)
579 if ((flags
& XT_REGF_COPROC0
) && (cpenable
& BIT(0)) == 0)
584 static bool xtensa_scratch_regs_fixup(struct xtensa
*xtensa
, struct reg
*reg_list
, int i
, int j
, int a_idx
, int ar_idx
)
586 int a_name
= (a_idx
== XT_AR_SCRATCH_A3
) ? 3 : 4;
587 if (xtensa
->scratch_ars
[a_idx
].intval
&& !xtensa
->scratch_ars
[ar_idx
].intval
) {
588 LOG_DEBUG("AR conflict: a%d -> ar%d", a_name
, j
- XT_REG_IDX_AR0
);
589 memcpy(reg_list
[j
].value
, reg_list
[i
].value
, sizeof(xtensa_reg_val_t
));
591 LOG_DEBUG("AR conflict: ar%d -> a%d", j
- XT_REG_IDX_AR0
, a_name
);
592 memcpy(reg_list
[i
].value
, reg_list
[j
].value
, sizeof(xtensa_reg_val_t
));
594 return xtensa
->scratch_ars
[a_idx
].intval
&& xtensa
->scratch_ars
[ar_idx
].intval
;
597 static int xtensa_write_dirty_registers(struct target
*target
)
599 struct xtensa
*xtensa
= target_to_xtensa(target
);
601 xtensa_reg_val_t regval
, windowbase
= 0;
602 bool scratch_reg_dirty
= false, delay_cpenable
= false;
603 struct reg
*reg_list
= xtensa
->core_cache
->reg_list
;
604 unsigned int reg_list_size
= xtensa
->core_cache
->num_regs
;
605 bool preserve_a3
= false;
607 xtensa_reg_val_t a3
= 0, woe
;
608 unsigned int ms_idx
= (xtensa
->core_config
->core_type
== XT_NX
) ?
609 xtensa
->nx_reg_idx
[XT_NX_REG_IDX_MS
] : reg_list_size
;
610 xtensa_reg_val_t ms
= 0;
611 bool restore_ms
= false;
613 LOG_TARGET_DEBUG(target
, "start");
615 /* We need to write the dirty registers in the cache list back to the processor.
616 * Start by writing the SFR/user registers. */
617 for (unsigned int i
= 0; i
< reg_list_size
; i
++) {
618 struct xtensa_reg_desc
*rlist
= (i
< XT_NUM_REGS
) ? xtensa_regs
: xtensa
->optregs
;
619 unsigned int ridx
= (i
< XT_NUM_REGS
) ? i
: i
- XT_NUM_REGS
;
620 if (reg_list
[i
].dirty
) {
621 if (rlist
[ridx
].type
== XT_REG_SPECIAL
||
622 rlist
[ridx
].type
== XT_REG_USER
||
623 rlist
[ridx
].type
== XT_REG_FR
) {
624 scratch_reg_dirty
= true;
625 if (i
== XT_REG_IDX_CPENABLE
) {
626 delay_cpenable
= true;
629 regval
= xtensa_reg_get(target
, i
);
630 LOG_TARGET_DEBUG(target
, "Writing back reg %s (%d) val %08" PRIX32
,
634 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, regval
);
635 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
636 if (reg_list
[i
].exist
) {
637 unsigned int reg_num
= rlist
[ridx
].reg_num
;
638 if (rlist
[ridx
].type
== XT_REG_USER
) {
639 xtensa_queue_exec_ins(xtensa
, XT_INS_WUR(xtensa
, reg_num
, XT_REG_A3
));
640 } else if (rlist
[ridx
].type
== XT_REG_FR
) {
641 xtensa_queue_exec_ins(xtensa
, XT_INS_WFR(xtensa
, reg_num
, XT_REG_A3
));
643 if (reg_num
== XT_PC_REG_NUM_VIRTUAL
) {
644 if (xtensa
->core_config
->core_type
== XT_LX
) {
645 /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
646 reg_num
= (XT_EPC_REG_NUM_BASE
+ xtensa
->core_config
->debug
.irq_level
);
647 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, reg_num
, XT_REG_A3
));
649 /* NX PC set through issuing a jump instruction */
650 xtensa_queue_exec_ins(xtensa
, XT_INS_JX(xtensa
, XT_REG_A3
));
652 } else if (i
== ms_idx
) {
653 /* MS must be restored after ARs. This ensures ARs remain in correct
654 * order even for reversed register groups (overflow/underflow).
658 LOG_TARGET_DEBUG(target
, "Delaying MS write: 0x%x", ms
);
660 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, reg_num
, XT_REG_A3
));
664 reg_list
[i
].dirty
= false;
668 if (scratch_reg_dirty
)
669 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A3
);
670 if (delay_cpenable
) {
671 regval
= xtensa_reg_get(target
, XT_REG_IDX_CPENABLE
);
672 LOG_TARGET_DEBUG(target
, "Writing back reg cpenable (224) val %08" PRIX32
, regval
);
673 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, regval
);
674 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
675 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
,
676 xtensa_regs
[XT_REG_IDX_CPENABLE
].reg_num
,
678 reg_list
[XT_REG_IDX_CPENABLE
].dirty
= false;
681 preserve_a3
= (xtensa
->core_config
->windowed
) || (xtensa
->core_config
->core_type
== XT_NX
);
683 /* Save (windowed) A3 for scratch use */
684 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
685 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, a3_buf
);
686 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
689 xtensa_core_status_check(target
);
690 a3
= buf_get_u32(a3_buf
, 0, 32);
693 if (xtensa
->core_config
->windowed
) {
694 res
= xtensa_window_state_save(target
, &woe
);
697 /* Grab the windowbase, we need it. */
698 uint32_t wb_idx
= (xtensa
->core_config
->core_type
== XT_LX
) ?
699 XT_REG_IDX_WINDOWBASE
: xtensa
->nx_reg_idx
[XT_NX_REG_IDX_WB
];
700 windowbase
= xtensa_reg_get(target
, wb_idx
);
701 if (xtensa
->core_config
->core_type
== XT_NX
)
702 windowbase
= (windowbase
& XT_WB_P_MSK
) >> XT_WB_P_SHIFT
;
704 /* Check if there are mismatches between the ARx and corresponding Ax registers.
705 * When the user sets a register on a windowed config, xt-gdb may set the ARx
706 * register directly. Thus we take ARx as priority over Ax if both are dirty
707 * and it's unclear if the user set one over the other explicitly.
709 for (unsigned int i
= XT_REG_IDX_A0
; i
<= XT_REG_IDX_A15
; i
++) {
710 unsigned int j
= xtensa_windowbase_offset_to_canonical(xtensa
, i
, windowbase
);
711 if (reg_list
[i
].dirty
&& reg_list
[j
].dirty
) {
712 if (memcmp(reg_list
[i
].value
, reg_list
[j
].value
, sizeof(xtensa_reg_val_t
)) != 0) {
713 bool show_warning
= true;
714 if (i
== XT_REG_IDX_A3
)
715 show_warning
= xtensa_scratch_regs_fixup(xtensa
,
716 reg_list
, i
, j
, XT_AR_SCRATCH_A3
, XT_AR_SCRATCH_AR3
);
717 else if (i
== XT_REG_IDX_A4
)
718 show_warning
= xtensa_scratch_regs_fixup(xtensa
,
719 reg_list
, i
, j
, XT_AR_SCRATCH_A4
, XT_AR_SCRATCH_AR4
);
722 "Warning: Both A%d [0x%08" PRIx32
723 "] as well as its underlying physical register "
724 "(AR%d) [0x%08" PRIx32
"] are dirty and differ in value",
726 buf_get_u32(reg_list
[i
].value
, 0, 32),
728 buf_get_u32(reg_list
[j
].value
, 0, 32));
735 for (unsigned int i
= 0; i
< 16; i
++) {
736 if (reg_list
[XT_REG_IDX_A0
+ i
].dirty
) {
737 regval
= xtensa_reg_get(target
, XT_REG_IDX_A0
+ i
);
738 LOG_TARGET_DEBUG(target
, "Writing back reg %s value %08" PRIX32
", num =%i",
739 xtensa_regs
[XT_REG_IDX_A0
+ i
].name
,
741 xtensa_regs
[XT_REG_IDX_A0
+ i
].reg_num
);
742 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, regval
);
743 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, i
));
744 reg_list
[XT_REG_IDX_A0
+ i
].dirty
= false;
746 /* Avoid stomping A3 during restore at end of function */
752 if (xtensa
->core_config
->windowed
) {
753 /* Now write AR registers */
754 for (unsigned int j
= 0; j
< XT_REG_IDX_ARLAST
; j
+= 16) {
755 /* Write the 16 registers we can see */
756 for (unsigned int i
= 0; i
< 16; i
++) {
757 if (i
+ j
< xtensa
->core_config
->aregs_num
) {
758 enum xtensa_reg_id realadr
=
759 xtensa_windowbase_offset_to_canonical(xtensa
, XT_REG_IDX_AR0
+ i
+ j
,
761 /* Write back any dirty un-windowed registers */
762 if (reg_list
[realadr
].dirty
) {
763 regval
= xtensa_reg_get(target
, realadr
);
766 "Writing back reg %s value %08" PRIX32
", num =%i",
767 xtensa_regs
[realadr
].name
,
769 xtensa_regs
[realadr
].reg_num
);
770 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, regval
);
771 xtensa_queue_exec_ins(xtensa
,
772 XT_INS_RSR(xtensa
, XT_SR_DDR
,
773 xtensa_regs
[XT_REG_IDX_AR0
+ i
].reg_num
));
774 reg_list
[realadr
].dirty
= false;
776 /* Avoid stomping AR during A3 restore at end of function */
782 /* Now rotate the window so we'll see the next 16 registers. The final rotate
783 * will wraparound, leaving us in the state we were.
784 * Each ROTW rotates 4 registers on LX and 8 on NX */
785 int rotw_arg
= (xtensa
->core_config
->core_type
== XT_LX
) ? 4 : 2;
786 xtensa_queue_exec_ins(xtensa
, XT_INS_ROTW(xtensa
, rotw_arg
));
789 xtensa_window_state_restore(target
, woe
);
791 for (enum xtensa_ar_scratch_set_e s
= 0; s
< XT_AR_SCRATCH_NUM
; s
++)
792 xtensa
->scratch_ars
[s
].intval
= false;
796 uint32_t ms_regno
= xtensa
->optregs
[ms_idx
- XT_NUM_REGS
].reg_num
;
797 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, ms
);
798 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
799 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, ms_regno
, XT_REG_A3
));
800 LOG_TARGET_DEBUG(target
, "Delayed MS (0x%x) write complete: 0x%x", ms_regno
, ms
);
804 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, a3
);
805 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
808 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
809 xtensa_core_status_check(target
);
814 static inline bool xtensa_is_stopped(struct target
*target
)
816 struct xtensa
*xtensa
= target_to_xtensa(target
);
817 return xtensa
->dbg_mod
.core_status
.dsr
& OCDDSR_STOPPED
;
820 int xtensa_examine(struct target
*target
)
822 struct xtensa
*xtensa
= target_to_xtensa(target
);
823 unsigned int cmd
= PWRCTL_DEBUGWAKEUP(xtensa
) | PWRCTL_MEMWAKEUP(xtensa
) | PWRCTL_COREWAKEUP(xtensa
);
825 LOG_DEBUG("coreid = %d", target
->coreid
);
827 if (xtensa
->core_config
->core_type
== XT_UNDEF
) {
828 LOG_ERROR("XTensa core not configured; is xtensa-core-openocd.cfg missing?");
832 xtensa_queue_pwr_reg_write(xtensa
, XDMREG_PWRCTL
, cmd
);
833 xtensa_queue_pwr_reg_write(xtensa
, XDMREG_PWRCTL
, cmd
| PWRCTL_JTAGDEBUGUSE(xtensa
));
834 xtensa_dm_queue_enable(&xtensa
->dbg_mod
);
835 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
836 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
839 if (!xtensa_dm_is_online(&xtensa
->dbg_mod
)) {
840 LOG_ERROR("Unexpected OCD_ID = %08" PRIx32
, xtensa
->dbg_mod
.device_id
);
841 return ERROR_TARGET_FAILURE
;
843 LOG_DEBUG("OCD_ID = %08" PRIx32
, xtensa
->dbg_mod
.device_id
);
844 target_set_examined(target
);
845 xtensa_smpbreak_write(xtensa
, xtensa
->smp_break
);
849 int xtensa_wakeup(struct target
*target
)
851 struct xtensa
*xtensa
= target_to_xtensa(target
);
852 unsigned int cmd
= PWRCTL_DEBUGWAKEUP(xtensa
) | PWRCTL_MEMWAKEUP(xtensa
) | PWRCTL_COREWAKEUP(xtensa
);
854 if (xtensa
->reset_asserted
)
855 cmd
|= PWRCTL_CORERESET(xtensa
);
856 xtensa_queue_pwr_reg_write(xtensa
, XDMREG_PWRCTL
, cmd
);
857 /* TODO: can we join this with the write above? */
858 xtensa_queue_pwr_reg_write(xtensa
, XDMREG_PWRCTL
, cmd
| PWRCTL_JTAGDEBUGUSE(xtensa
));
859 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
860 return xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
863 int xtensa_smpbreak_write(struct xtensa
*xtensa
, uint32_t set
)
865 uint32_t dsr_data
= 0x00110000;
866 uint32_t clear
= (set
| OCDDCR_ENABLEOCD
) ^
867 (OCDDCR_BREAKINEN
| OCDDCR_BREAKOUTEN
| OCDDCR_RUNSTALLINEN
|
868 OCDDCR_DEBUGMODEOUTEN
| OCDDCR_ENABLEOCD
);
870 LOG_TARGET_DEBUG(xtensa
->target
, "write smpbreak set=0x%" PRIx32
" clear=0x%" PRIx32
, set
, clear
);
871 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DCRSET
, set
| OCDDCR_ENABLEOCD
);
872 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DCRCLR
, clear
);
873 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DSR
, dsr_data
);
874 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
875 return xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
878 int xtensa_smpbreak_set(struct target
*target
, uint32_t set
)
880 struct xtensa
*xtensa
= target_to_xtensa(target
);
883 xtensa
->smp_break
= set
;
884 if (target_was_examined(target
))
885 res
= xtensa_smpbreak_write(xtensa
, xtensa
->smp_break
);
886 LOG_TARGET_DEBUG(target
, "set smpbreak=%" PRIx32
", state=%i", set
, target
->state
);
890 int xtensa_smpbreak_read(struct xtensa
*xtensa
, uint32_t *val
)
892 uint8_t dcr_buf
[sizeof(uint32_t)];
894 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DCRSET
, dcr_buf
);
895 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
896 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
897 *val
= buf_get_u32(dcr_buf
, 0, 32);
902 int xtensa_smpbreak_get(struct target
*target
, uint32_t *val
)
904 struct xtensa
*xtensa
= target_to_xtensa(target
);
905 *val
= xtensa
->smp_break
;
909 static inline xtensa_reg_val_t
xtensa_reg_get_value(struct reg
*reg
)
911 return buf_get_u32(reg
->value
, 0, 32);
914 static inline void xtensa_reg_set_value(struct reg
*reg
, xtensa_reg_val_t value
)
916 buf_set_u32(reg
->value
, 0, 32, value
);
920 static int xtensa_imprecise_exception_occurred(struct target
*target
)
922 struct xtensa
*xtensa
= target_to_xtensa(target
);
923 for (enum xtensa_nx_reg_idx idx
= XT_NX_REG_IDX_IEVEC
; idx
<= XT_NX_REG_IDX_MESR
; idx
++) {
924 enum xtensa_reg_id ridx
= xtensa
->nx_reg_idx
[idx
];
925 if (xtensa
->nx_reg_idx
[idx
]) {
926 xtensa_reg_val_t reg
= xtensa_reg_get(target
, xtensa
->nx_reg_idx
[idx
]);
927 if (reg
& XT_IMPR_EXC_MSK
) {
928 LOG_TARGET_DEBUG(target
, "Imprecise exception: %s: 0x%x",
929 xtensa
->core_cache
->reg_list
[ridx
].name
, reg
);
937 static void xtensa_imprecise_exception_clear(struct target
*target
)
939 struct xtensa
*xtensa
= target_to_xtensa(target
);
940 for (enum xtensa_nx_reg_idx idx
= XT_NX_REG_IDX_IEVEC
; idx
<= XT_NX_REG_IDX_MESRCLR
; idx
++) {
941 enum xtensa_reg_id ridx
= xtensa
->nx_reg_idx
[idx
];
942 if (ridx
&& idx
!= XT_NX_REG_IDX_MESR
) {
943 xtensa_reg_val_t value
= (idx
== XT_NX_REG_IDX_MESRCLR
) ? XT_MESRCLR_IMPR_EXC_MSK
: 0;
944 xtensa_reg_set(target
, ridx
, value
);
945 LOG_TARGET_DEBUG(target
, "Imprecise exception: clearing %s (0x%x)",
946 xtensa
->core_cache
->reg_list
[ridx
].name
, value
);
951 int xtensa_core_status_check(struct target
*target
)
953 struct xtensa
*xtensa
= target_to_xtensa(target
);
954 int res
, needclear
= 0, needimprclear
= 0;
956 xtensa_dm_core_status_read(&xtensa
->dbg_mod
);
957 xtensa_dsr_t dsr
= xtensa_dm_core_status_get(&xtensa
->dbg_mod
);
958 LOG_TARGET_DEBUG(target
, "DSR (%08" PRIX32
")", dsr
);
959 if (dsr
& OCDDSR_EXECBUSY
) {
960 if (!xtensa
->suppress_dsr_errors
)
961 LOG_TARGET_ERROR(target
, "DSR (%08" PRIX32
") indicates target still busy!", dsr
);
964 if (dsr
& OCDDSR_EXECEXCEPTION
) {
965 if (!xtensa
->suppress_dsr_errors
)
966 LOG_TARGET_ERROR(target
,
967 "DSR (%08" PRIX32
") indicates DIR instruction generated an exception!",
971 if (dsr
& OCDDSR_EXECOVERRUN
) {
972 if (!xtensa
->suppress_dsr_errors
)
973 LOG_TARGET_ERROR(target
,
974 "DSR (%08" PRIX32
") indicates DIR instruction generated an overrun!",
978 if (xtensa
->core_config
->core_type
== XT_NX
&& (xtensa_imprecise_exception_occurred(target
))) {
979 if (!xtensa
->suppress_dsr_errors
)
980 LOG_TARGET_ERROR(target
,
981 "%s: Imprecise exception occurred!", target_name(target
));
986 res
= xtensa_dm_core_status_clear(&xtensa
->dbg_mod
,
987 OCDDSR_EXECEXCEPTION
| OCDDSR_EXECOVERRUN
);
988 if (res
!= ERROR_OK
&& !xtensa
->suppress_dsr_errors
)
989 LOG_TARGET_ERROR(target
, "clearing DSR failed!");
990 if (xtensa
->core_config
->core_type
== XT_NX
&& needimprclear
)
991 xtensa_imprecise_exception_clear(target
);
997 xtensa_reg_val_t
xtensa_reg_get(struct target
*target
, enum xtensa_reg_id reg_id
)
999 struct xtensa
*xtensa
= target_to_xtensa(target
);
1000 struct reg
*reg
= &xtensa
->core_cache
->reg_list
[reg_id
];
1001 return xtensa_reg_get_value(reg
);
1004 void xtensa_reg_set(struct target
*target
, enum xtensa_reg_id reg_id
, xtensa_reg_val_t value
)
1006 struct xtensa
*xtensa
= target_to_xtensa(target
);
1007 struct reg
*reg
= &xtensa
->core_cache
->reg_list
[reg_id
];
1008 if (xtensa_reg_get_value(reg
) == value
)
1010 xtensa_reg_set_value(reg
, value
);
1013 /* Set Ax (XT_REG_RELGEN) register along with its underlying ARx (XT_REG_GENERAL) */
1014 void xtensa_reg_set_deep_relgen(struct target
*target
, enum xtensa_reg_id a_idx
, xtensa_reg_val_t value
)
1016 struct xtensa
*xtensa
= target_to_xtensa(target
);
1017 uint32_t wb_idx
= (xtensa
->core_config
->core_type
== XT_LX
) ?
1018 XT_REG_IDX_WINDOWBASE
: xtensa
->nx_reg_idx
[XT_NX_REG_IDX_WB
];
1019 uint32_t windowbase
= (xtensa
->core_config
->windowed
?
1020 xtensa_reg_get(target
, wb_idx
) : 0);
1021 if (xtensa
->core_config
->core_type
== XT_NX
)
1022 windowbase
= (windowbase
& XT_WB_P_MSK
) >> XT_WB_P_SHIFT
;
1023 int ar_idx
= xtensa_windowbase_offset_to_canonical(xtensa
, a_idx
, windowbase
);
1024 xtensa_reg_set(target
, a_idx
, value
);
1025 xtensa_reg_set(target
, ar_idx
, value
);
1028 /* Read cause for entering halted state; return bitmask in DEBUGCAUSE_* format */
1029 uint32_t xtensa_cause_get(struct target
*target
)
1031 struct xtensa
*xtensa
= target_to_xtensa(target
);
1032 if (xtensa
->core_config
->core_type
== XT_LX
) {
1033 /* LX cause in DEBUGCAUSE */
1034 return xtensa_reg_get(target
, XT_REG_IDX_DEBUGCAUSE
);
1036 if (xtensa
->nx_stop_cause
& DEBUGCAUSE_VALID
)
1037 return xtensa
->nx_stop_cause
;
1039 /* NX cause determined from DSR.StopCause */
1040 if (xtensa_dm_core_status_read(&xtensa
->dbg_mod
) != ERROR_OK
) {
1041 LOG_TARGET_ERROR(target
, "Read DSR error");
1043 uint32_t dsr
= xtensa_dm_core_status_get(&xtensa
->dbg_mod
);
1044 /* NX causes are prioritized; only 1 bit can be set */
1045 switch ((dsr
& OCDDSR_STOPCAUSE
) >> OCDDSR_STOPCAUSE_SHIFT
) {
1046 case OCDDSR_STOPCAUSE_DI
:
1047 xtensa
->nx_stop_cause
= DEBUGCAUSE_DI
;
1049 case OCDDSR_STOPCAUSE_SS
:
1050 xtensa
->nx_stop_cause
= DEBUGCAUSE_IC
;
1052 case OCDDSR_STOPCAUSE_IB
:
1053 xtensa
->nx_stop_cause
= DEBUGCAUSE_IB
;
1055 case OCDDSR_STOPCAUSE_B
:
1056 case OCDDSR_STOPCAUSE_B1
:
1057 xtensa
->nx_stop_cause
= DEBUGCAUSE_BI
;
1059 case OCDDSR_STOPCAUSE_BN
:
1060 xtensa
->nx_stop_cause
= DEBUGCAUSE_BN
;
1062 case OCDDSR_STOPCAUSE_DB0
:
1063 case OCDDSR_STOPCAUSE_DB1
:
1064 xtensa
->nx_stop_cause
= DEBUGCAUSE_DB
;
1067 LOG_TARGET_ERROR(target
, "Unknown stop cause (DSR: 0x%08x)", dsr
);
1070 if (xtensa
->nx_stop_cause
)
1071 xtensa
->nx_stop_cause
|= DEBUGCAUSE_VALID
;
1073 return xtensa
->nx_stop_cause
;
1076 void xtensa_cause_clear(struct target
*target
)
1078 struct xtensa
*xtensa
= target_to_xtensa(target
);
1079 if (xtensa
->core_config
->core_type
== XT_LX
) {
1080 xtensa_reg_set(target
, XT_REG_IDX_DEBUGCAUSE
, 0);
1081 xtensa
->core_cache
->reg_list
[XT_REG_IDX_DEBUGCAUSE
].dirty
= false;
1083 /* NX DSR.STOPCAUSE is not writeable; clear cached copy but leave it valid */
1084 xtensa
->nx_stop_cause
= DEBUGCAUSE_VALID
;
1088 void xtensa_cause_reset(struct target
*target
)
1090 /* Clear DEBUGCAUSE_VALID to trigger re-read (on NX) */
1091 struct xtensa
*xtensa
= target_to_xtensa(target
);
1092 xtensa
->nx_stop_cause
= 0;
1095 int xtensa_assert_reset(struct target
*target
)
1097 struct xtensa
*xtensa
= target_to_xtensa(target
);
1099 LOG_TARGET_DEBUG(target
, "target_number=%i, begin", target
->target_number
);
1100 xtensa_queue_pwr_reg_write(xtensa
,
1102 PWRCTL_JTAGDEBUGUSE(xtensa
) | PWRCTL_DEBUGWAKEUP(xtensa
) | PWRCTL_MEMWAKEUP(xtensa
) |
1103 PWRCTL_COREWAKEUP(xtensa
) | PWRCTL_CORERESET(xtensa
));
1104 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
1105 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1106 if (res
!= ERROR_OK
)
1109 /* registers are now invalid */
1110 xtensa
->reset_asserted
= true;
1111 register_cache_invalidate(xtensa
->core_cache
);
1112 target
->state
= TARGET_RESET
;
1116 int xtensa_deassert_reset(struct target
*target
)
1118 struct xtensa
*xtensa
= target_to_xtensa(target
);
1120 LOG_TARGET_DEBUG(target
, "halt=%d", target
->reset_halt
);
1121 if (target
->reset_halt
)
1122 xtensa_queue_dbg_reg_write(xtensa
,
1124 OCDDCR_ENABLEOCD
| OCDDCR_DEBUGINTERRUPT
);
1125 xtensa_queue_pwr_reg_write(xtensa
,
1127 PWRCTL_JTAGDEBUGUSE(xtensa
) | PWRCTL_DEBUGWAKEUP(xtensa
) | PWRCTL_MEMWAKEUP(xtensa
) |
1128 PWRCTL_COREWAKEUP(xtensa
));
1129 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
1130 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1131 if (res
!= ERROR_OK
)
1133 target
->state
= TARGET_RUNNING
;
1134 xtensa
->reset_asserted
= false;
1138 int xtensa_soft_reset_halt(struct target
*target
)
1140 LOG_TARGET_DEBUG(target
, "begin");
1141 return xtensa_assert_reset(target
);
1144 int xtensa_fetch_all_regs(struct target
*target
)
1146 struct xtensa
*xtensa
= target_to_xtensa(target
);
1147 struct reg
*reg_list
= xtensa
->core_cache
->reg_list
;
1148 unsigned int reg_list_size
= xtensa
->core_cache
->num_regs
;
1149 xtensa_reg_val_t cpenable
= 0, windowbase
= 0, a0
= 0, a3
;
1150 unsigned int ms_idx
= reg_list_size
;
1153 uint8_t a0_buf
[4], a3_buf
[4], ms_buf
[4];
1154 bool debug_dsrs
= !xtensa
->regs_fetched
|| LOG_LEVEL_IS(LOG_LVL_DEBUG
);
1156 union xtensa_reg_val_u
*regvals
= calloc(reg_list_size
, sizeof(*regvals
));
1158 LOG_TARGET_ERROR(target
, "unable to allocate memory for regvals!");
1161 union xtensa_reg_val_u
*dsrs
= calloc(reg_list_size
, sizeof(*dsrs
));
1163 LOG_TARGET_ERROR(target
, "unable to allocate memory for dsrs!");
1168 LOG_TARGET_DEBUG(target
, "start");
1170 /* Save (windowed) A3 so cache matches physical AR3; A3 usable as scratch */
1171 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1172 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, a3_buf
);
1173 if (xtensa
->core_config
->core_type
== XT_NX
) {
1174 /* Save (windowed) A0 as well--it will be required for reading PC */
1175 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A0
));
1176 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, a0_buf
);
1178 /* Set MS.DispSt, clear MS.DE prior to accessing ARs. This ensures ARs remain
1179 * in correct order even for reversed register groups (overflow/underflow).
1181 ms_idx
= xtensa
->nx_reg_idx
[XT_NX_REG_IDX_MS
];
1182 uint32_t ms_regno
= xtensa
->optregs
[ms_idx
- XT_NUM_REGS
].reg_num
;
1183 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, ms_regno
, XT_REG_A3
));
1184 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1185 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, ms_buf
);
1186 LOG_TARGET_DEBUG(target
, "Overriding MS (0x%x): 0x%x", ms_regno
, XT_MS_DISPST_DBG
);
1187 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, XT_MS_DISPST_DBG
);
1188 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1189 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, ms_regno
, XT_REG_A3
));
1192 int res
= xtensa_window_state_save(target
, &woe
);
1193 if (res
!= ERROR_OK
)
1194 goto xtensa_fetch_all_regs_done
;
1196 /* Assume the CPU has just halted. We now want to fill the register cache with all the
1197 * register contents GDB needs. For speed, we pipeline all the read operations, execute them
1198 * in one go, then sort everything out from the regvals variable. */
1200 /* Start out with AREGS; we can reach those immediately. Grab them per 16 registers. */
1201 for (unsigned int j
= 0; j
< XT_AREGS_NUM_MAX
; j
+= 16) {
1202 /*Grab the 16 registers we can see */
1203 for (unsigned int i
= 0; i
< 16; i
++) {
1204 if (i
+ j
< xtensa
->core_config
->aregs_num
) {
1205 xtensa_queue_exec_ins(xtensa
,
1206 XT_INS_WSR(xtensa
, XT_SR_DDR
, xtensa_regs
[XT_REG_IDX_AR0
+ i
].reg_num
));
1207 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
,
1208 regvals
[XT_REG_IDX_AR0
+ i
+ j
].buf
);
1210 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DSR
,
1211 dsrs
[XT_REG_IDX_AR0
+ i
+ j
].buf
);
1214 if (xtensa
->core_config
->windowed
) {
1215 /* Now rotate the window so we'll see the next 16 registers. The final rotate
1216 * will wraparound, leaving us in the state we were.
1217 * Each ROTW rotates 4 registers on LX and 8 on NX */
1218 int rotw_arg
= (xtensa
->core_config
->core_type
== XT_LX
) ? 4 : 2;
1219 xtensa_queue_exec_ins(xtensa
, XT_INS_ROTW(xtensa
, rotw_arg
));
1222 xtensa_window_state_restore(target
, woe
);
1224 if (xtensa
->core_config
->coproc
) {
1225 /* As the very first thing after AREGS, go grab CPENABLE */
1226 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, xtensa_regs
[XT_REG_IDX_CPENABLE
].reg_num
, XT_REG_A3
));
1227 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1228 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, regvals
[XT_REG_IDX_CPENABLE
].buf
);
1230 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1231 if (res
!= ERROR_OK
) {
1232 LOG_ERROR("Failed to read ARs (%d)!", res
);
1233 goto xtensa_fetch_all_regs_done
;
1235 xtensa_core_status_check(target
);
1237 a3
= buf_get_u32(a3_buf
, 0, 32);
1238 if (xtensa
->core_config
->core_type
== XT_NX
) {
1239 a0
= buf_get_u32(a0_buf
, 0, 32);
1240 ms
= buf_get_u32(ms_buf
, 0, 32);
1243 if (xtensa
->core_config
->coproc
) {
1244 cpenable
= buf_get_u32(regvals
[XT_REG_IDX_CPENABLE
].buf
, 0, 32);
1246 /* Enable all coprocessors (by setting all bits in CPENABLE) so we can read FP and user registers. */
1247 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, 0xffffffff);
1248 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1249 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, xtensa_regs
[XT_REG_IDX_CPENABLE
].reg_num
, XT_REG_A3
));
1251 /* Save CPENABLE; flag dirty later (when regcache updated) so original value is always restored */
1252 LOG_TARGET_DEBUG(target
, "CPENABLE: was 0x%" PRIx32
", all enabled", cpenable
);
1253 xtensa_reg_set(target
, XT_REG_IDX_CPENABLE
, cpenable
);
1255 /* We're now free to use any of A0-A15 as scratch registers
1256 * Grab the SFRs and user registers first. We use A3 as a scratch register. */
1257 for (unsigned int i
= 0; i
< reg_list_size
; i
++) {
1258 struct xtensa_reg_desc
*rlist
= (i
< XT_NUM_REGS
) ? xtensa_regs
: xtensa
->optregs
;
1259 unsigned int ridx
= (i
< XT_NUM_REGS
) ? i
: i
- XT_NUM_REGS
;
1260 if (xtensa_reg_is_readable(rlist
[ridx
].flags
, cpenable
) && rlist
[ridx
].exist
) {
1261 bool reg_fetched
= true;
1262 unsigned int reg_num
= rlist
[ridx
].reg_num
;
1263 switch (rlist
[ridx
].type
) {
1265 xtensa_queue_exec_ins(xtensa
, XT_INS_RUR(xtensa
, reg_num
, XT_REG_A3
));
1268 xtensa_queue_exec_ins(xtensa
, XT_INS_RFR(xtensa
, reg_num
, XT_REG_A3
));
1270 case XT_REG_SPECIAL
:
1271 if (reg_num
== XT_PC_REG_NUM_VIRTUAL
) {
1272 if (xtensa
->core_config
->core_type
== XT_LX
) {
1273 /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
1274 reg_num
= XT_EPC_REG_NUM_BASE
+ xtensa
->core_config
->debug
.irq_level
;
1275 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, reg_num
, XT_REG_A3
));
1277 /* NX PC read through CALL0(0) and reading A0 */
1278 xtensa_queue_exec_ins(xtensa
, XT_INS_CALL0(xtensa
, 0));
1279 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A0
));
1280 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, regvals
[i
].buf
);
1281 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DSR
, dsrs
[i
].buf
);
1282 reg_fetched
= false;
1284 } else if ((xtensa
->core_config
->core_type
== XT_LX
)
1285 && (reg_num
== xtensa_regs
[XT_REG_IDX_PS
].reg_num
)) {
1286 /* reg number of PS for debug interrupt depends on NDEBUGLEVEL */
1287 reg_num
= XT_EPS_REG_NUM_BASE
+ xtensa
->core_config
->debug
.irq_level
;
1288 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, reg_num
, XT_REG_A3
));
1289 } else if (reg_num
== xtensa_regs
[XT_REG_IDX_CPENABLE
].reg_num
) {
1290 /* CPENABLE already read/updated; don't re-read */
1291 reg_fetched
= false;
1294 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, reg_num
, XT_REG_A3
));
1298 reg_fetched
= false;
1301 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1302 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, regvals
[i
].buf
);
1304 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DSR
, dsrs
[i
].buf
);
1308 /* Ok, send the whole mess to the CPU. */
1309 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1310 if (res
!= ERROR_OK
) {
1311 LOG_ERROR("Failed to fetch AR regs!");
1312 goto xtensa_fetch_all_regs_done
;
1314 xtensa_core_status_check(target
);
1317 /* DSR checking: follows order in which registers are requested. */
1318 for (unsigned int i
= 0; i
< reg_list_size
; i
++) {
1319 struct xtensa_reg_desc
*rlist
= (i
< XT_NUM_REGS
) ? xtensa_regs
: xtensa
->optregs
;
1320 unsigned int ridx
= (i
< XT_NUM_REGS
) ? i
: i
- XT_NUM_REGS
;
1321 if (xtensa_reg_is_readable(rlist
[ridx
].flags
, cpenable
) && rlist
[ridx
].exist
&&
1322 (rlist
[ridx
].type
!= XT_REG_DEBUG
) &&
1323 (rlist
[ridx
].type
!= XT_REG_RELGEN
) &&
1324 (rlist
[ridx
].type
!= XT_REG_TIE
) &&
1325 (rlist
[ridx
].type
!= XT_REG_OTHER
)) {
1326 if (buf_get_u32(dsrs
[i
].buf
, 0, 32) & OCDDSR_EXECEXCEPTION
) {
1327 LOG_ERROR("Exception reading %s!", reg_list
[i
].name
);
1329 goto xtensa_fetch_all_regs_done
;
1335 if (xtensa
->core_config
->windowed
) {
1336 /* We need the windowbase to decode the general addresses. */
1337 uint32_t wb_idx
= (xtensa
->core_config
->core_type
== XT_LX
) ?
1338 XT_REG_IDX_WINDOWBASE
: xtensa
->nx_reg_idx
[XT_NX_REG_IDX_WB
];
1339 windowbase
= buf_get_u32(regvals
[wb_idx
].buf
, 0, 32);
1340 if (xtensa
->core_config
->core_type
== XT_NX
)
1341 windowbase
= (windowbase
& XT_WB_P_MSK
) >> XT_WB_P_SHIFT
;
1344 /* Decode the result and update the cache. */
1345 for (unsigned int i
= 0; i
< reg_list_size
; i
++) {
1346 struct xtensa_reg_desc
*rlist
= (i
< XT_NUM_REGS
) ? xtensa_regs
: xtensa
->optregs
;
1347 unsigned int ridx
= (i
< XT_NUM_REGS
) ? i
: i
- XT_NUM_REGS
;
1348 if (xtensa_reg_is_readable(rlist
[ridx
].flags
, cpenable
) && rlist
[ridx
].exist
) {
1349 if ((xtensa
->core_config
->windowed
) && (rlist
[ridx
].type
== XT_REG_GENERAL
)) {
1350 /* The 64-value general register set is read from (windowbase) on down.
1351 * We need to get the real register address by subtracting windowbase and
1352 * wrapping around. */
1353 enum xtensa_reg_id realadr
= xtensa_canonical_to_windowbase_offset(xtensa
, i
,
1355 buf_cpy(regvals
[realadr
].buf
, reg_list
[i
].value
, reg_list
[i
].size
);
1356 } else if (rlist
[ridx
].type
== XT_REG_RELGEN
) {
1357 buf_cpy(regvals
[rlist
[ridx
].reg_num
].buf
, reg_list
[i
].value
, reg_list
[i
].size
);
1358 if (xtensa_extra_debug_log
) {
1359 xtensa_reg_val_t regval
= buf_get_u32(regvals
[rlist
[ridx
].reg_num
].buf
, 0, 32);
1360 LOG_DEBUG("%s = 0x%x", rlist
[ridx
].name
, regval
);
1363 xtensa_reg_val_t regval
= buf_get_u32(regvals
[i
].buf
, 0, 32);
1364 bool is_dirty
= (i
== XT_REG_IDX_CPENABLE
);
1365 if (xtensa_extra_debug_log
)
1366 LOG_INFO("Register %s: 0x%X", reg_list
[i
].name
, regval
);
1367 if (rlist
[ridx
].reg_num
== XT_PC_REG_NUM_VIRTUAL
&&
1368 xtensa
->core_config
->core_type
== XT_NX
) {
1369 /* A0 from prior CALL0 points to next instruction; decrement it */
1372 } else if (i
== ms_idx
) {
1373 LOG_TARGET_DEBUG(target
, "Caching MS: 0x%x", ms
);
1377 xtensa_reg_set(target
, i
, regval
);
1378 reg_list
[i
].dirty
= is_dirty
; /*always do this _after_ xtensa_reg_set! */
1380 reg_list
[i
].valid
= true;
1382 if ((rlist
[ridx
].flags
& XT_REGF_MASK
) == XT_REGF_NOREAD
) {
1383 /* Report read-only registers all-zero but valid */
1384 reg_list
[i
].valid
= true;
1385 xtensa_reg_set(target
, i
, 0);
1387 reg_list
[i
].valid
= false;
1392 if (xtensa
->core_config
->windowed
) {
1393 /* We have used A3 as a scratch register.
1394 * Windowed configs: restore A3's AR (XT_REG_GENERAL) and and flag for write-back.
1396 enum xtensa_reg_id ar3_idx
= xtensa_windowbase_offset_to_canonical(xtensa
, XT_REG_IDX_A3
, windowbase
);
1397 xtensa_reg_set(target
, ar3_idx
, a3
);
1398 xtensa_mark_register_dirty(xtensa
, ar3_idx
);
1400 /* Reset scratch_ars[] on fetch. .chrval tracks AR mapping and changes w/ window */
1401 sprintf(xtensa
->scratch_ars
[XT_AR_SCRATCH_AR3
].chrval
, "ar%d", ar3_idx
- XT_REG_IDX_AR0
);
1402 enum xtensa_reg_id ar4_idx
= xtensa_windowbase_offset_to_canonical(xtensa
, XT_REG_IDX_A4
, windowbase
);
1403 sprintf(xtensa
->scratch_ars
[XT_AR_SCRATCH_AR4
].chrval
, "ar%d", ar4_idx
- XT_REG_IDX_AR0
);
1404 for (enum xtensa_ar_scratch_set_e s
= 0; s
< XT_AR_SCRATCH_NUM
; s
++)
1405 xtensa
->scratch_ars
[s
].intval
= false;
1408 /* We have used A3 (XT_REG_RELGEN) as a scratch register. Restore and flag for write-back. */
1409 xtensa_reg_set(target
, XT_REG_IDX_A3
, a3
);
1410 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A3
);
1411 if (xtensa
->core_config
->core_type
== XT_NX
) {
1412 xtensa_reg_set(target
, XT_REG_IDX_A0
, a0
);
1413 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A0
);
1416 xtensa
->regs_fetched
= true;
1417 xtensa_fetch_all_regs_done
:
1423 int xtensa_get_gdb_reg_list(struct target
*target
,
1424 struct reg
**reg_list
[],
1426 enum target_register_class reg_class
)
1428 struct xtensa
*xtensa
= target_to_xtensa(target
);
1429 unsigned int num_regs
;
1431 if (reg_class
== REG_CLASS_GENERAL
) {
1432 if ((xtensa
->genpkt_regs_num
== 0) || !xtensa
->contiguous_regs_list
) {
1433 LOG_ERROR("reg_class %d unhandled; 'xtgregs' not found", reg_class
);
1436 num_regs
= xtensa
->genpkt_regs_num
;
1438 /* Determine whether to return a contiguous or sparse register map */
1439 num_regs
= xtensa
->regmap_contiguous
? xtensa
->total_regs_num
: xtensa
->dbregs_num
;
1442 LOG_DEBUG("reg_class=%i, num_regs=%d", (int)reg_class
, num_regs
);
1444 *reg_list
= calloc(num_regs
, sizeof(struct reg
*));
1448 *reg_list_size
= num_regs
;
1449 if (xtensa
->regmap_contiguous
) {
1450 assert((num_regs
<= xtensa
->total_regs_num
) && "contiguous regmap size internal error!");
1451 for (unsigned int i
= 0; i
< num_regs
; i
++)
1452 (*reg_list
)[i
] = xtensa
->contiguous_regs_list
[i
];
1456 for (unsigned int i
= 0; i
< num_regs
; i
++)
1457 (*reg_list
)[i
] = (struct reg
*)&xtensa
->empty_regs
[i
];
1459 for (unsigned int i
= 0; i
< xtensa
->core_cache
->num_regs
&& k
< num_regs
; i
++) {
1460 if (xtensa
->core_cache
->reg_list
[i
].exist
) {
1461 struct xtensa_reg_desc
*rlist
= (i
< XT_NUM_REGS
) ? xtensa_regs
: xtensa
->optregs
;
1462 unsigned int ridx
= (i
< XT_NUM_REGS
) ? i
: i
- XT_NUM_REGS
;
1463 int sparse_idx
= rlist
[ridx
].dbreg_num
;
1464 if (i
== XT_REG_IDX_PS
&& xtensa
->core_config
->core_type
== XT_LX
) {
1465 if (xtensa
->eps_dbglevel_idx
== 0) {
1466 LOG_ERROR("eps_dbglevel_idx not set\n");
1469 (*reg_list
)[sparse_idx
] = &xtensa
->core_cache
->reg_list
[xtensa
->eps_dbglevel_idx
];
1470 if (xtensa_extra_debug_log
)
1471 LOG_DEBUG("SPARSE GDB reg 0x%x getting EPS%d 0x%x",
1472 sparse_idx
, xtensa
->core_config
->debug
.irq_level
,
1473 xtensa_reg_get_value((*reg_list
)[sparse_idx
]));
1474 } else if (rlist
[ridx
].type
== XT_REG_RELGEN
) {
1475 (*reg_list
)[sparse_idx
- XT_REG_IDX_ARFIRST
] = &xtensa
->core_cache
->reg_list
[i
];
1477 (*reg_list
)[sparse_idx
] = &xtensa
->core_cache
->reg_list
[i
];
1479 if (i
== XT_REG_IDX_PC
)
1480 /* Make a duplicate copy of PC for external access */
1481 (*reg_list
)[XT_PC_DBREG_NUM_BASE
] = &xtensa
->core_cache
->reg_list
[i
];
1487 LOG_ERROR("SPARSE GDB reg list full (size %d)", k
);
1492 int xtensa_mmu_is_enabled(struct target
*target
, int *enabled
)
1494 struct xtensa
*xtensa
= target_to_xtensa(target
);
1495 *enabled
= xtensa
->core_config
->mmu
.itlb_entries_count
> 0 ||
1496 xtensa
->core_config
->mmu
.dtlb_entries_count
> 0;
1500 int xtensa_halt(struct target
*target
)
1502 struct xtensa
*xtensa
= target_to_xtensa(target
);
1504 LOG_TARGET_DEBUG(target
, "start");
1505 if (target
->state
== TARGET_HALTED
) {
1506 LOG_TARGET_DEBUG(target
, "target was already halted");
1509 /* First we have to read dsr and check if the target stopped */
1510 int res
= xtensa_dm_core_status_read(&xtensa
->dbg_mod
);
1511 if (res
!= ERROR_OK
) {
1512 LOG_TARGET_ERROR(target
, "Failed to read core status!");
1515 LOG_TARGET_DEBUG(target
, "Core status 0x%" PRIx32
, xtensa_dm_core_status_get(&xtensa
->dbg_mod
));
1516 if (!xtensa_is_stopped(target
)) {
1517 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DCRSET
, OCDDCR_ENABLEOCD
| OCDDCR_DEBUGINTERRUPT
);
1518 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
1519 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1520 if (res
!= ERROR_OK
)
1521 LOG_TARGET_ERROR(target
, "Failed to set OCDDCR_DEBUGINTERRUPT. Can't halt.");
1527 int xtensa_prepare_resume(struct target
*target
,
1529 target_addr_t address
,
1530 int handle_breakpoints
,
1531 int debug_execution
)
1533 struct xtensa
*xtensa
= target_to_xtensa(target
);
1536 LOG_TARGET_DEBUG(target
,
1537 "current=%d address=" TARGET_ADDR_FMT
", handle_breakpoints=%i, debug_execution=%i)",
1543 if (target
->state
!= TARGET_HALTED
) {
1544 LOG_TARGET_ERROR(target
, "not halted");
1545 return ERROR_TARGET_NOT_HALTED
;
1547 xtensa
->halt_request
= false;
1549 if (address
&& !current
) {
1550 xtensa_reg_set(target
, XT_REG_IDX_PC
, address
);
1552 uint32_t cause
= xtensa_cause_get(target
);
1553 LOG_TARGET_DEBUG(target
, "DEBUGCAUSE 0x%x (watchpoint %lu) (break %lu)",
1554 cause
, (cause
& DEBUGCAUSE_DB
), (cause
& (DEBUGCAUSE_BI
| DEBUGCAUSE_BN
)));
1555 if (cause
& DEBUGCAUSE_DB
)
1556 /* We stopped due to a watchpoint. We can't just resume executing the
1557 * instruction again because */
1558 /* that would trigger the watchpoint again. To fix this, we single-step,
1559 * which ignores watchpoints. */
1560 xtensa_do_step(target
, current
, address
, handle_breakpoints
);
1561 if (cause
& (DEBUGCAUSE_BI
| DEBUGCAUSE_BN
))
1562 /* We stopped due to a break instruction. We can't just resume executing the
1563 * instruction again because */
1564 /* that would trigger the break again. To fix this, we single-step, which
1566 xtensa_do_step(target
, current
, address
, handle_breakpoints
);
1569 /* Write back hw breakpoints. Current FreeRTOS SMP code can set a hw breakpoint on an
1570 * exception; we need to clear that and return to the breakpoints gdb has set on resume. */
1571 for (unsigned int slot
= 0; slot
< xtensa
->core_config
->debug
.ibreaks_num
; slot
++) {
1572 if (xtensa
->hw_brps
[slot
]) {
1573 /* Write IBREAKA[slot] and set bit #slot in IBREAKENABLE */
1574 xtensa_reg_set(target
, XT_REG_IDX_IBREAKA0
+ slot
, xtensa
->hw_brps
[slot
]->address
);
1575 if (xtensa
->core_config
->core_type
== XT_NX
)
1576 xtensa_reg_set(target
, xtensa
->nx_reg_idx
[XT_NX_REG_IDX_IBREAKC0
] + slot
, XT_IBREAKC_FB
);
1580 if (xtensa
->core_config
->core_type
== XT_LX
)
1581 xtensa_reg_set(target
, XT_REG_IDX_IBREAKENABLE
, bpena
);
1583 /* Here we write all registers to the targets */
1584 int res
= xtensa_write_dirty_registers(target
);
1585 if (res
!= ERROR_OK
)
1586 LOG_TARGET_ERROR(target
, "Failed to write back register cache.");
1590 int xtensa_do_resume(struct target
*target
)
1592 struct xtensa
*xtensa
= target_to_xtensa(target
);
1594 LOG_TARGET_DEBUG(target
, "start");
1596 xtensa_cause_reset(target
);
1597 xtensa_queue_exec_ins(xtensa
, XT_INS_RFDO(xtensa
));
1598 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1599 if (res
!= ERROR_OK
) {
1600 LOG_TARGET_ERROR(target
, "Failed to exec RFDO %d!", res
);
1603 xtensa_core_status_check(target
);
1607 int xtensa_resume(struct target
*target
,
1609 target_addr_t address
,
1610 int handle_breakpoints
,
1611 int debug_execution
)
1613 LOG_TARGET_DEBUG(target
, "start");
1614 int res
= xtensa_prepare_resume(target
, current
, address
, handle_breakpoints
, debug_execution
);
1615 if (res
!= ERROR_OK
) {
1616 LOG_TARGET_ERROR(target
, "Failed to prepare for resume!");
1619 res
= xtensa_do_resume(target
);
1620 if (res
!= ERROR_OK
) {
1621 LOG_TARGET_ERROR(target
, "Failed to resume!");
1625 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1626 if (!debug_execution
)
1627 target
->state
= TARGET_RUNNING
;
1629 target
->state
= TARGET_DEBUG_RUNNING
;
1631 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1636 static bool xtensa_pc_in_winexc(struct target
*target
, target_addr_t pc
)
1638 struct xtensa
*xtensa
= target_to_xtensa(target
);
1639 uint8_t insn_buf
[XT_ISNS_SZ_MAX
];
1640 int err
= xtensa_read_buffer(target
, pc
, sizeof(insn_buf
), insn_buf
);
1641 if (err
!= ERROR_OK
)
1644 xtensa_insn_t insn
= buf_get_u32(insn_buf
, 0, 24);
1645 xtensa_insn_t masked
= insn
& XT_INS_L32E_S32E_MASK(xtensa
);
1646 if (masked
== XT_INS_L32E(xtensa
, 0, 0, 0) || masked
== XT_INS_S32E(xtensa
, 0, 0, 0))
1649 masked
= insn
& XT_INS_RFWO_RFWU_MASK(xtensa
);
1650 if (masked
== XT_INS_RFWO(xtensa
) || masked
== XT_INS_RFWU(xtensa
))
1656 int xtensa_do_step(struct target
*target
, int current
, target_addr_t address
, int handle_breakpoints
)
1658 struct xtensa
*xtensa
= target_to_xtensa(target
);
1660 const uint32_t icount_val
= -2; /* ICOUNT value to load for 1 step */
1661 xtensa_reg_val_t dbreakc
[XT_WATCHPOINTS_NUM_MAX
];
1662 xtensa_reg_val_t icountlvl
, cause
;
1663 xtensa_reg_val_t oldps
, oldpc
, cur_pc
;
1664 bool ps_lowered
= false;
1666 LOG_TARGET_DEBUG(target
, "current=%d, address=" TARGET_ADDR_FMT
", handle_breakpoints=%i",
1667 current
, address
, handle_breakpoints
);
1669 if (target
->state
!= TARGET_HALTED
) {
1670 LOG_TARGET_ERROR(target
, "not halted");
1671 return ERROR_TARGET_NOT_HALTED
;
1674 if (xtensa
->eps_dbglevel_idx
== 0 && xtensa
->core_config
->core_type
== XT_LX
) {
1675 LOG_TARGET_ERROR(target
, "eps_dbglevel_idx not set\n");
1679 /* Save old ps (EPS[dbglvl] on LX), pc */
1680 oldps
= xtensa_reg_get(target
, (xtensa
->core_config
->core_type
== XT_LX
) ?
1681 xtensa
->eps_dbglevel_idx
: XT_REG_IDX_PS
);
1682 oldpc
= xtensa_reg_get(target
, XT_REG_IDX_PC
);
1684 cause
= xtensa_cause_get(target
);
1685 LOG_TARGET_DEBUG(target
, "oldps=%" PRIx32
", oldpc=%" PRIx32
" dbg_cause=%" PRIx32
" exc_cause=%" PRIx32
,
1689 xtensa_reg_get(target
, XT_REG_IDX_EXCCAUSE
));
1690 if (handle_breakpoints
&& (cause
& (DEBUGCAUSE_BI
| DEBUGCAUSE_BN
))) {
1691 /* handle hard-coded SW breakpoints (e.g. syscalls) */
1692 LOG_TARGET_DEBUG(target
, "Increment PC to pass break instruction...");
1693 xtensa_cause_clear(target
); /* so we don't recurse into the same routine */
1694 /* pretend that we have stepped */
1695 if (cause
& DEBUGCAUSE_BI
)
1696 xtensa_reg_set(target
, XT_REG_IDX_PC
, oldpc
+ 3); /* PC = PC+3 */
1698 xtensa_reg_set(target
, XT_REG_IDX_PC
, oldpc
+ 2); /* PC = PC+2 */
1702 /* Xtensa LX has an ICOUNTLEVEL register which sets the maximum interrupt level
1703 * at which the instructions are to be counted while stepping.
1705 * For example, if we need to step by 2 instructions, and an interrupt occurs
1706 * in between, the processor will trigger the interrupt and halt after the 2nd
1707 * instruction within the interrupt vector and/or handler.
1709 * However, sometimes we don't want the interrupt handlers to be executed at all
1710 * while stepping through the code. In this case (XT_STEPPING_ISR_OFF),
1711 * ICOUNTLEVEL can be lowered to the executing code's (level + 1) to prevent ISR
1712 * code from being counted during stepping. Note that C exception handlers must
1713 * run at level 0 and hence will be counted and stepped into, should one occur.
1715 * TODO: Certain instructions should never be single-stepped and should instead
1716 * be emulated (per DUG): RSIL >= DBGLEVEL, RSR/WSR [ICOUNT|ICOUNTLEVEL], and
1719 if (xtensa
->stepping_isr_mode
== XT_STEPPING_ISR_OFF
) {
1720 if (!xtensa
->core_config
->high_irq
.enabled
) {
1723 "disabling IRQs while stepping is not implemented w/o high prio IRQs option!");
1726 /* Update ICOUNTLEVEL accordingly */
1727 icountlvl
= MIN((oldps
& 0xF) + 1, xtensa
->core_config
->debug
.irq_level
);
1729 icountlvl
= xtensa
->core_config
->debug
.irq_level
;
1732 if (cause
& DEBUGCAUSE_DB
) {
1733 /* We stopped due to a watchpoint. We can't just resume executing the instruction again because
1734 * that would trigger the watchpoint again. To fix this, we remove watchpoints,single-step and
1735 * re-enable the watchpoint. */
1738 "Single-stepping to get past instruction that triggered the watchpoint...");
1739 xtensa_cause_clear(target
); /* so we don't recurse into the same routine */
1740 /* Save all DBREAKCx registers and set to 0 to disable watchpoints */
1741 for (unsigned int slot
= 0; slot
< xtensa
->core_config
->debug
.dbreaks_num
; slot
++) {
1742 dbreakc
[slot
] = xtensa_reg_get(target
, XT_REG_IDX_DBREAKC0
+ slot
);
1743 xtensa_reg_set(target
, XT_REG_IDX_DBREAKC0
+ slot
, 0);
1747 if (!handle_breakpoints
&& (cause
& (DEBUGCAUSE_BI
| DEBUGCAUSE_BN
)))
1748 /* handle normal SW breakpoint */
1749 xtensa_cause_clear(target
); /* so we don't recurse into the same routine */
1750 if (xtensa
->core_config
->core_type
== XT_LX
&& ((oldps
& 0xf) >= icountlvl
)) {
1751 /* Lower interrupt level to allow stepping, but flag eps[dbglvl] to be restored */
1753 uint32_t newps
= (oldps
& ~0xf) | (icountlvl
- 1);
1754 xtensa_reg_set(target
, xtensa
->eps_dbglevel_idx
, newps
);
1755 LOG_TARGET_DEBUG(target
,
1756 "Lowering PS.INTLEVEL to allow stepping: %s <- 0x%08" PRIx32
" (was 0x%08" PRIx32
")",
1757 xtensa
->core_cache
->reg_list
[xtensa
->eps_dbglevel_idx
].name
,
1762 if (xtensa
->core_config
->core_type
== XT_LX
) {
1763 xtensa_reg_set(target
, XT_REG_IDX_ICOUNTLEVEL
, icountlvl
);
1764 xtensa_reg_set(target
, XT_REG_IDX_ICOUNT
, icount_val
);
1766 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DCRSET
, OCDDCR_STEPREQUEST
);
1769 /* Now that ICOUNT (LX) or DCR.StepRequest (NX) is set,
1770 * we can resume as if we were going to run
1772 res
= xtensa_prepare_resume(target
, current
, address
, 0, 0);
1773 if (res
!= ERROR_OK
) {
1774 LOG_TARGET_ERROR(target
, "Failed to prepare resume for single step");
1777 res
= xtensa_do_resume(target
);
1778 if (res
!= ERROR_OK
) {
1779 LOG_TARGET_ERROR(target
, "Failed to resume after setting up single step");
1783 /* Wait for stepping to complete */
1784 long long start
= timeval_ms();
1785 while (timeval_ms() < start
+ 500) {
1786 /* Do not use target_poll here, it also triggers other things... just manually read the DSR
1787 *until stepping is complete. */
1789 res
= xtensa_dm_core_status_read(&xtensa
->dbg_mod
);
1790 if (res
!= ERROR_OK
) {
1791 LOG_TARGET_ERROR(target
, "Failed to read core status!");
1794 if (xtensa_is_stopped(target
))
1798 LOG_TARGET_DEBUG(target
, "Finish stepping. dsr=0x%08" PRIx32
,
1799 xtensa_dm_core_status_get(&xtensa
->dbg_mod
));
1800 if (!xtensa_is_stopped(target
)) {
1803 "Timed out waiting for target to finish stepping. dsr=0x%08" PRIx32
,
1804 xtensa_dm_core_status_get(&xtensa
->dbg_mod
));
1805 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1806 target
->state
= TARGET_RUNNING
;
1810 xtensa_fetch_all_regs(target
);
1811 cur_pc
= xtensa_reg_get(target
, XT_REG_IDX_PC
);
1813 LOG_TARGET_DEBUG(target
,
1814 "cur_ps=%" PRIx32
", cur_pc=%" PRIx32
" dbg_cause=%" PRIx32
" exc_cause=%" PRIx32
,
1815 xtensa_reg_get(target
, XT_REG_IDX_PS
),
1817 xtensa_cause_get(target
),
1818 xtensa_reg_get(target
, XT_REG_IDX_EXCCAUSE
));
1820 /* Do not step into WindowOverflow if ISRs are masked.
1821 If we stop in WindowOverflow at breakpoint with masked ISRs and
1822 try to do a step it will get us out of that handler */
1823 if (xtensa
->core_config
->windowed
&&
1824 xtensa
->stepping_isr_mode
== XT_STEPPING_ISR_OFF
&&
1825 xtensa_pc_in_winexc(target
, cur_pc
)) {
1826 /* isrmask = on, need to step out of the window exception handler */
1827 LOG_DEBUG("Stepping out of window exception, PC=%" PRIX32
, cur_pc
);
1829 address
= oldpc
+ 3;
1833 if (oldpc
== cur_pc
)
1834 LOG_TARGET_WARNING(target
, "Stepping doesn't seem to change PC! dsr=0x%08" PRIx32
,
1835 xtensa_dm_core_status_get(&xtensa
->dbg_mod
));
1837 LOG_DEBUG("Stepped from %" PRIX32
" to %" PRIX32
, oldpc
, cur_pc
);
1841 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1842 target
->state
= TARGET_HALTED
;
1843 LOG_DEBUG("Done stepping, PC=%" PRIX32
, cur_pc
);
1845 if (cause
& DEBUGCAUSE_DB
) {
1846 LOG_TARGET_DEBUG(target
, "...Done, re-installing watchpoints.");
1847 /* Restore the DBREAKCx registers */
1848 for (unsigned int slot
= 0; slot
< xtensa
->core_config
->debug
.dbreaks_num
; slot
++)
1849 xtensa_reg_set(target
, XT_REG_IDX_DBREAKC0
+ slot
, dbreakc
[slot
]);
1852 /* Restore int level */
1854 LOG_DEBUG("Restoring %s after stepping: 0x%08" PRIx32
,
1855 xtensa
->core_cache
->reg_list
[xtensa
->eps_dbglevel_idx
].name
,
1857 xtensa_reg_set(target
, xtensa
->eps_dbglevel_idx
, oldps
);
1860 /* write ICOUNTLEVEL back to zero */
1861 xtensa_reg_set(target
, XT_REG_IDX_ICOUNTLEVEL
, 0);
1862 /* TODO: can we skip writing dirty registers and re-fetching them? */
1863 res
= xtensa_write_dirty_registers(target
);
1864 xtensa_fetch_all_regs(target
);
1868 int xtensa_step(struct target
*target
, int current
, target_addr_t address
, int handle_breakpoints
)
1870 int retval
= xtensa_do_step(target
, current
, address
, handle_breakpoints
);
1871 if (retval
!= ERROR_OK
)
1873 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1879 * Returns true if two ranges are overlapping
1881 static inline bool xtensa_memory_regions_overlap(target_addr_t r1_start
,
1882 target_addr_t r1_end
,
1883 target_addr_t r2_start
,
1884 target_addr_t r2_end
)
1886 if ((r2_start
>= r1_start
) && (r2_start
< r1_end
))
1887 return true; /* r2_start is in r1 region */
1888 if ((r2_end
> r1_start
) && (r2_end
<= r1_end
))
1889 return true; /* r2_end is in r1 region */
1894 * Returns a size of overlapped region of two ranges.
1896 static inline target_addr_t
xtensa_get_overlap_size(target_addr_t r1_start
,
1897 target_addr_t r1_end
,
1898 target_addr_t r2_start
,
1899 target_addr_t r2_end
)
1901 if (xtensa_memory_regions_overlap(r1_start
, r1_end
, r2_start
, r2_end
)) {
1902 target_addr_t ov_start
= r1_start
< r2_start
? r2_start
: r1_start
;
1903 target_addr_t ov_end
= r1_end
> r2_end
? r2_end
: r1_end
;
1904 return ov_end
- ov_start
;
1910 * Check if the address gets to memory regions, and its access mode
1912 static bool xtensa_memory_op_validate_range(struct xtensa
*xtensa
, target_addr_t address
, size_t size
, int access
)
1914 target_addr_t adr_pos
= address
; /* address cursor set to the beginning start */
1915 target_addr_t adr_end
= address
+ size
; /* region end */
1916 target_addr_t overlap_size
;
1917 const struct xtensa_local_mem_region_config
*cm
; /* current mem region */
1919 while (adr_pos
< adr_end
) {
1920 cm
= xtensa_target_memory_region_find(xtensa
, adr_pos
);
1921 if (!cm
) /* address is not belong to anything */
1923 if ((cm
->access
& access
) != access
) /* access check */
1925 overlap_size
= xtensa_get_overlap_size(cm
->base
, (cm
->base
+ cm
->size
), adr_pos
, adr_end
);
1926 assert(overlap_size
!= 0);
1927 adr_pos
+= overlap_size
;
1932 int xtensa_read_memory(struct target
*target
, target_addr_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
)
1934 struct xtensa
*xtensa
= target_to_xtensa(target
);
1935 /* We are going to read memory in 32-bit increments. This may not be what the calling
1936 * function expects, so we may need to allocate a temp buffer and read into that first. */
1937 target_addr_t addrstart_al
= ALIGN_DOWN(address
, 4);
1938 target_addr_t addrend_al
= ALIGN_UP(address
+ size
* count
, 4);
1939 target_addr_t adr
= addrstart_al
;
1941 bool bswap
= xtensa
->target
->endianness
== TARGET_BIG_ENDIAN
;
1943 if (target
->state
!= TARGET_HALTED
) {
1944 LOG_TARGET_ERROR(target
, "not halted");
1945 return ERROR_TARGET_NOT_HALTED
;
1948 if (!xtensa
->permissive_mode
) {
1949 if (!xtensa_memory_op_validate_range(xtensa
, address
, (size
* count
),
1950 XT_MEM_ACCESS_READ
)) {
1951 LOG_DEBUG("address " TARGET_ADDR_FMT
" not readable", address
);
1956 unsigned int alloc_bytes
= ALIGN_UP(addrend_al
- addrstart_al
, sizeof(uint32_t));
1957 albuff
= calloc(alloc_bytes
, 1);
1959 LOG_TARGET_ERROR(target
, "Out of memory allocating %" PRId64
" bytes!",
1960 addrend_al
- addrstart_al
);
1961 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1964 /* We're going to use A3 here */
1965 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A3
);
1966 /* Write start address to A3 */
1967 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, addrstart_al
);
1968 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1969 /* Now we can safely read data from addrstart_al up to addrend_al into albuff */
1970 if (xtensa
->probe_lsddr32p
!= 0) {
1971 xtensa_queue_exec_ins(xtensa
, XT_INS_LDDR32P(xtensa
, XT_REG_A3
));
1972 for (unsigned int i
= 0; adr
!= addrend_al
; i
+= sizeof(uint32_t), adr
+= sizeof(uint32_t))
1973 xtensa_queue_dbg_reg_read(xtensa
,
1974 (adr
+ sizeof(uint32_t) == addrend_al
) ? XDMREG_DDR
: XDMREG_DDREXEC
,
1977 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A4
);
1978 for (unsigned int i
= 0; adr
!= addrend_al
; i
+= sizeof(uint32_t), adr
+= sizeof(uint32_t)) {
1979 xtensa_queue_exec_ins(xtensa
, XT_INS_L32I(xtensa
, XT_REG_A3
, XT_REG_A4
, 0));
1980 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A4
));
1981 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, &albuff
[i
]);
1982 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, adr
+ sizeof(uint32_t));
1983 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
1986 int res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
1987 if (res
== ERROR_OK
) {
1988 bool prev_suppress
= xtensa
->suppress_dsr_errors
;
1989 xtensa
->suppress_dsr_errors
= true;
1990 res
= xtensa_core_status_check(target
);
1991 if (xtensa
->probe_lsddr32p
== -1)
1992 xtensa
->probe_lsddr32p
= 1;
1993 xtensa
->suppress_dsr_errors
= prev_suppress
;
1995 if (res
!= ERROR_OK
) {
1996 if (xtensa
->probe_lsddr32p
!= 0) {
1997 /* Disable fast memory access instructions and retry before reporting an error */
1998 LOG_TARGET_DEBUG(target
, "Disabling LDDR32.P/SDDR32.P");
1999 xtensa
->probe_lsddr32p
= 0;
2000 res
= xtensa_read_memory(target
, address
, size
, count
, albuff
);
2003 LOG_TARGET_WARNING(target
, "Failed reading %d bytes at address "TARGET_ADDR_FMT
,
2004 count
* size
, address
);
2009 buf_bswap32(albuff
, albuff
, addrend_al
- addrstart_al
);
2010 memcpy(buffer
, albuff
+ (address
& 3), (size
* count
));
2015 int xtensa_read_buffer(struct target
*target
, target_addr_t address
, uint32_t count
, uint8_t *buffer
)
2017 /* xtensa_read_memory can also read unaligned stuff. Just pass through to that routine. */
2018 return xtensa_read_memory(target
, address
, 1, count
, buffer
);
2021 int xtensa_write_memory(struct target
*target
,
2022 target_addr_t address
,
2025 const uint8_t *buffer
)
2027 /* This memory write function can get thrown nigh everything into it, from
2028 * aligned uint32 writes to unaligned uint8ths. The Xtensa memory doesn't always
2029 * accept anything but aligned uint32 writes, though. That is why we convert
2030 * everything into that. */
2031 struct xtensa
*xtensa
= target_to_xtensa(target
);
2032 target_addr_t addrstart_al
= ALIGN_DOWN(address
, 4);
2033 target_addr_t addrend_al
= ALIGN_UP(address
+ size
* count
, 4);
2034 target_addr_t adr
= addrstart_al
;
2037 bool fill_head_tail
= false;
2039 if (target
->state
!= TARGET_HALTED
) {
2040 LOG_TARGET_ERROR(target
, "not halted");
2041 return ERROR_TARGET_NOT_HALTED
;
2044 if (!xtensa
->permissive_mode
) {
2045 if (!xtensa_memory_op_validate_range(xtensa
, address
, (size
* count
), XT_MEM_ACCESS_WRITE
)) {
2046 LOG_WARNING("address " TARGET_ADDR_FMT
" not writable", address
);
2051 if (size
== 0 || count
== 0 || !buffer
)
2052 return ERROR_COMMAND_SYNTAX_ERROR
;
2054 /* Allocate a temporary buffer to put the aligned bytes in, if needed. */
2055 if (addrstart_al
== address
&& addrend_al
== address
+ (size
* count
)) {
2056 if (xtensa
->target
->endianness
== TARGET_BIG_ENDIAN
)
2057 /* Need a buffer for byte-swapping */
2058 albuff
= malloc(addrend_al
- addrstart_al
);
2060 /* We discard the const here because albuff can also be non-const */
2061 albuff
= (uint8_t *)buffer
;
2063 fill_head_tail
= true;
2064 albuff
= malloc(addrend_al
- addrstart_al
);
2067 LOG_TARGET_ERROR(target
, "Out of memory allocating %" PRId64
" bytes!",
2068 addrend_al
- addrstart_al
);
2069 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2072 /* We're going to use A3 here */
2073 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A3
);
2075 /* If we're using a temp aligned buffer, we need to fill the head and/or tail bit of it. */
2076 if (fill_head_tail
) {
2077 /* See if we need to read the first and/or last word. */
2079 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, addrstart_al
);
2080 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2081 if (xtensa
->probe_lsddr32p
== 1) {
2082 xtensa_queue_exec_ins(xtensa
, XT_INS_LDDR32P(xtensa
, XT_REG_A3
));
2084 xtensa_queue_exec_ins(xtensa
, XT_INS_L32I(xtensa
, XT_REG_A3
, XT_REG_A3
, 0));
2085 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2087 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
, &albuff
[0]);
2089 if ((address
+ (size
* count
)) & 3) {
2090 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, addrend_al
- 4);
2091 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2092 if (xtensa
->probe_lsddr32p
== 1) {
2093 xtensa_queue_exec_ins(xtensa
, XT_INS_LDDR32P(xtensa
, XT_REG_A3
));
2095 xtensa_queue_exec_ins(xtensa
, XT_INS_L32I(xtensa
, XT_REG_A3
, XT_REG_A3
, 0));
2096 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2098 xtensa_queue_dbg_reg_read(xtensa
, XDMREG_DDR
,
2099 &albuff
[addrend_al
- addrstart_al
- 4]);
2102 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2103 if (res
!= ERROR_OK
) {
2104 LOG_ERROR("Error issuing unaligned memory write context instruction(s): %d", res
);
2105 if (albuff
!= buffer
)
2109 xtensa_core_status_check(target
);
2110 if (xtensa
->target
->endianness
== TARGET_BIG_ENDIAN
) {
2111 bool swapped_w0
= false;
2113 buf_bswap32(&albuff
[0], &albuff
[0], 4);
2116 if ((address
+ (size
* count
)) & 3) {
2117 if ((addrend_al
- addrstart_al
- 4 == 0) && swapped_w0
) {
2118 /* Don't double-swap if buffer start/end are within the same word */
2120 buf_bswap32(&albuff
[addrend_al
- addrstart_al
- 4],
2121 &albuff
[addrend_al
- addrstart_al
- 4], 4);
2125 /* Copy data to be written into the aligned buffer (in host-endianness) */
2126 memcpy(&albuff
[address
& 3], buffer
, size
* count
);
2127 /* Now we can write albuff in aligned uint32s. */
2130 if (xtensa
->target
->endianness
== TARGET_BIG_ENDIAN
)
2131 buf_bswap32(albuff
, fill_head_tail
? albuff
: buffer
, addrend_al
- addrstart_al
);
2133 /* Write start address to A3 */
2134 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, addrstart_al
);
2135 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2136 /* Write the aligned buffer */
2137 if (xtensa
->probe_lsddr32p
!= 0) {
2138 for (unsigned int i
= 0; adr
!= addrend_al
; i
+= sizeof(uint32_t), adr
+= sizeof(uint32_t)) {
2140 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, buf_get_u32(&albuff
[i
], 0, 32));
2141 xtensa_queue_exec_ins(xtensa
, XT_INS_SDDR32P(xtensa
, XT_REG_A3
));
2143 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDREXEC
, buf_get_u32(&albuff
[i
], 0, 32));
2147 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A4
);
2148 for (unsigned int i
= 0; adr
!= addrend_al
; i
+= sizeof(uint32_t), adr
+= sizeof(uint32_t)) {
2149 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, buf_get_u32(&albuff
[i
], 0, 32));
2150 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A4
));
2151 xtensa_queue_exec_ins(xtensa
, XT_INS_S32I(xtensa
, XT_REG_A3
, XT_REG_A4
, 0));
2152 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, adr
+ sizeof(uint32_t));
2153 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2157 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2158 if (res
== ERROR_OK
) {
2159 bool prev_suppress
= xtensa
->suppress_dsr_errors
;
2160 xtensa
->suppress_dsr_errors
= true;
2161 res
= xtensa_core_status_check(target
);
2162 if (xtensa
->probe_lsddr32p
== -1)
2163 xtensa
->probe_lsddr32p
= 1;
2164 xtensa
->suppress_dsr_errors
= prev_suppress
;
2166 if (res
!= ERROR_OK
) {
2167 if (xtensa
->probe_lsddr32p
!= 0) {
2168 /* Disable fast memory access instructions and retry before reporting an error */
2169 LOG_TARGET_INFO(target
, "Disabling LDDR32.P/SDDR32.P");
2170 xtensa
->probe_lsddr32p
= 0;
2171 res
= xtensa_write_memory(target
, address
, size
, count
, buffer
);
2173 LOG_TARGET_WARNING(target
, "Failed writing %d bytes at address "TARGET_ADDR_FMT
,
2174 count
* size
, address
);
2177 /* Invalidate ICACHE, writeback DCACHE if present */
2178 uint32_t issue_ihi
= xtensa_is_icacheable(xtensa
, address
);
2179 uint32_t issue_dhwb
= xtensa_is_dcacheable(xtensa
, address
);
2180 if (issue_ihi
|| issue_dhwb
) {
2181 uint32_t ilinesize
= issue_ihi
? xtensa
->core_config
->icache
.line_size
: UINT32_MAX
;
2182 uint32_t dlinesize
= issue_dhwb
? xtensa
->core_config
->dcache
.line_size
: UINT32_MAX
;
2183 uint32_t linesize
= MIN(ilinesize
, dlinesize
);
2187 while ((adr
+ off
) < addrend_al
) {
2189 /* Write start address to A3 */
2190 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, adr
);
2191 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2194 xtensa_queue_exec_ins(xtensa
, XT_INS_IHI(xtensa
, XT_REG_A3
, off
));
2196 xtensa_queue_exec_ins(xtensa
, XT_INS_DHWBI(xtensa
, XT_REG_A3
, off
));
2199 /* IHI, DHWB have 8-bit immediate operands (0..1020) */
2205 /* Execute cache WB/INV instructions */
2206 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2207 xtensa_core_status_check(target
);
2208 if (res
!= ERROR_OK
)
2209 LOG_TARGET_ERROR(target
,
2210 "Error issuing cache writeback/invaldate instruction(s): %d",
2214 if (albuff
!= buffer
)
2220 int xtensa_write_buffer(struct target
*target
, target_addr_t address
, uint32_t count
, const uint8_t *buffer
)
2222 /* xtensa_write_memory can handle everything. Just pass on to that. */
2223 return xtensa_write_memory(target
, address
, 1, count
, buffer
);
2226 int xtensa_checksum_memory(struct target
*target
, target_addr_t address
, uint32_t count
, uint32_t *checksum
)
2228 LOG_WARNING("not implemented yet");
2232 int xtensa_poll(struct target
*target
)
2234 struct xtensa
*xtensa
= target_to_xtensa(target
);
2235 if (xtensa_dm_poll(&xtensa
->dbg_mod
) != ERROR_OK
) {
2236 target
->state
= TARGET_UNKNOWN
;
2237 return ERROR_TARGET_NOT_EXAMINED
;
2240 int res
= xtensa_dm_power_status_read(&xtensa
->dbg_mod
, PWRSTAT_DEBUGWASRESET(xtensa
) |
2241 PWRSTAT_COREWASRESET(xtensa
));
2242 if (xtensa
->dbg_mod
.power_status
.stat
!= xtensa
->dbg_mod
.power_status
.stath
)
2243 LOG_TARGET_DEBUG(target
, "PWRSTAT: read 0x%08" PRIx32
", clear 0x%08lx, reread 0x%08" PRIx32
,
2244 xtensa
->dbg_mod
.power_status
.stat
,
2245 PWRSTAT_DEBUGWASRESET(xtensa
) | PWRSTAT_COREWASRESET(xtensa
),
2246 xtensa
->dbg_mod
.power_status
.stath
);
2247 if (res
!= ERROR_OK
)
2250 if (xtensa_dm_tap_was_reset(&xtensa
->dbg_mod
)) {
2251 LOG_TARGET_INFO(target
, "Debug controller was reset.");
2252 res
= xtensa_smpbreak_write(xtensa
, xtensa
->smp_break
);
2253 if (res
!= ERROR_OK
)
2256 if (xtensa_dm_core_was_reset(&xtensa
->dbg_mod
))
2257 LOG_TARGET_INFO(target
, "Core was reset.");
2258 xtensa_dm_power_status_cache(&xtensa
->dbg_mod
);
2259 /* Enable JTAG, set reset if needed */
2260 res
= xtensa_wakeup(target
);
2261 if (res
!= ERROR_OK
)
2264 uint32_t prev_dsr
= xtensa
->dbg_mod
.core_status
.dsr
;
2265 res
= xtensa_dm_core_status_read(&xtensa
->dbg_mod
);
2266 if (res
!= ERROR_OK
)
2268 if (prev_dsr
!= xtensa
->dbg_mod
.core_status
.dsr
)
2269 LOG_TARGET_DEBUG(target
,
2270 "DSR has changed: was 0x%08" PRIx32
" now 0x%08" PRIx32
,
2272 xtensa
->dbg_mod
.core_status
.dsr
);
2273 if (xtensa
->dbg_mod
.power_status
.stath
& PWRSTAT_COREWASRESET(xtensa
)) {
2274 /* if RESET state is persitent */
2275 target
->state
= TARGET_RESET
;
2276 } else if (!xtensa_dm_is_powered(&xtensa
->dbg_mod
)) {
2277 LOG_TARGET_DEBUG(target
, "not powered 0x%" PRIX32
"%ld",
2278 xtensa
->dbg_mod
.core_status
.dsr
,
2279 xtensa
->dbg_mod
.core_status
.dsr
& OCDDSR_STOPPED
);
2280 target
->state
= TARGET_UNKNOWN
;
2281 if (xtensa
->come_online_probes_num
== 0)
2282 target
->examined
= false;
2284 xtensa
->come_online_probes_num
--;
2285 } else if (xtensa_is_stopped(target
)) {
2286 if (target
->state
!= TARGET_HALTED
) {
2287 enum target_state oldstate
= target
->state
;
2288 target
->state
= TARGET_HALTED
;
2289 /* Examine why the target has been halted */
2290 target
->debug_reason
= DBG_REASON_DBGRQ
;
2291 xtensa_fetch_all_regs(target
);
2292 /* When setting debug reason DEBUGCAUSE events have the following
2293 * priorities: watchpoint == breakpoint > single step > debug interrupt. */
2294 /* Watchpoint and breakpoint events at the same time results in special
2295 * debug reason: DBG_REASON_WPTANDBKPT. */
2296 uint32_t halt_cause
= xtensa_cause_get(target
);
2297 /* TODO: Add handling of DBG_REASON_EXC_CATCH */
2298 if (halt_cause
& DEBUGCAUSE_IC
)
2299 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
2300 if (halt_cause
& (DEBUGCAUSE_IB
| DEBUGCAUSE_BN
| DEBUGCAUSE_BI
)) {
2301 if (halt_cause
& DEBUGCAUSE_DB
)
2302 target
->debug_reason
= DBG_REASON_WPTANDBKPT
;
2304 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
2305 } else if (halt_cause
& DEBUGCAUSE_DB
) {
2306 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
2308 LOG_TARGET_DEBUG(target
, "Target halted, pc=0x%08" PRIx32
2309 ", debug_reason=%08" PRIx32
", oldstate=%08" PRIx32
,
2310 xtensa_reg_get(target
, XT_REG_IDX_PC
),
2311 target
->debug_reason
,
2313 LOG_TARGET_DEBUG(target
, "Halt reason=0x%08" PRIX32
", exc_cause=%" PRId32
", dsr=0x%08" PRIx32
,
2315 xtensa_reg_get(target
, XT_REG_IDX_EXCCAUSE
),
2316 xtensa
->dbg_mod
.core_status
.dsr
);
2317 xtensa_dm_core_status_clear(
2319 OCDDSR_DEBUGPENDBREAK
| OCDDSR_DEBUGINTBREAK
| OCDDSR_DEBUGPENDTRAX
|
2320 OCDDSR_DEBUGINTTRAX
|
2321 OCDDSR_DEBUGPENDHOST
| OCDDSR_DEBUGINTHOST
);
2322 if (xtensa
->core_config
->core_type
== XT_NX
) {
2323 /* Enable imprecise exceptions while in halted state */
2324 xtensa_reg_val_t ps
= xtensa_reg_get(target
, XT_REG_IDX_PS
);
2325 xtensa_reg_val_t newps
= ps
& ~(XT_PS_DIEXC_MSK
);
2326 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_PS
);
2327 LOG_TARGET_DEBUG(target
, "Enabling PS.DIEXC: 0x%08x -> 0x%08x", ps
, newps
);
2328 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, newps
);
2329 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2330 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
, XT_SR_PS
, XT_REG_A3
));
2331 res
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2332 if (res
!= ERROR_OK
) {
2333 LOG_TARGET_ERROR(target
, "Failed to write PS.DIEXC (%d)!", res
);
2336 xtensa_core_status_check(target
);
2340 target
->debug_reason
= DBG_REASON_NOTHALTED
;
2341 if (target
->state
!= TARGET_RUNNING
&& target
->state
!= TARGET_DEBUG_RUNNING
) {
2342 target
->state
= TARGET_RUNNING
;
2343 target
->debug_reason
= DBG_REASON_NOTHALTED
;
2346 if (xtensa
->trace_active
) {
2347 /* Detect if tracing was active but has stopped. */
2348 struct xtensa_trace_status trace_status
;
2349 res
= xtensa_dm_trace_status_read(&xtensa
->dbg_mod
, &trace_status
);
2350 if (res
== ERROR_OK
) {
2351 if (!(trace_status
.stat
& TRAXSTAT_TRACT
)) {
2352 LOG_INFO("Detected end of trace.");
2353 if (trace_status
.stat
& TRAXSTAT_PCMTG
)
2354 LOG_TARGET_INFO(target
, "Trace stop triggered by PC match");
2355 if (trace_status
.stat
& TRAXSTAT_PTITG
)
2356 LOG_TARGET_INFO(target
, "Trace stop triggered by Processor Trigger Input");
2357 if (trace_status
.stat
& TRAXSTAT_CTITG
)
2358 LOG_TARGET_INFO(target
, "Trace stop triggered by Cross-trigger Input");
2359 xtensa
->trace_active
= false;
2366 static int xtensa_update_instruction(struct target
*target
, target_addr_t address
, uint32_t size
, const uint8_t *buffer
)
2368 struct xtensa
*xtensa
= target_to_xtensa(target
);
2369 unsigned int issue_ihi
= xtensa_is_icacheable(xtensa
, address
);
2370 unsigned int issue_dhwbi
= xtensa_is_dcacheable(xtensa
, address
);
2371 uint32_t icache_line_size
= issue_ihi
? xtensa
->core_config
->icache
.line_size
: UINT32_MAX
;
2372 uint32_t dcache_line_size
= issue_dhwbi
? xtensa
->core_config
->dcache
.line_size
: UINT32_MAX
;
2373 unsigned int same_ic_line
= ((address
& (icache_line_size
- 1)) + size
) <= icache_line_size
;
2374 unsigned int same_dc_line
= ((address
& (dcache_line_size
- 1)) + size
) <= dcache_line_size
;
2377 if (size
> icache_line_size
)
2380 if (issue_ihi
|| issue_dhwbi
) {
2381 /* We're going to use A3 here */
2382 xtensa_mark_register_dirty(xtensa
, XT_REG_IDX_A3
);
2384 /* Write start address to A3 and invalidate */
2385 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, address
);
2386 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2387 LOG_TARGET_DEBUG(target
, "DHWBI, IHI for address "TARGET_ADDR_FMT
, address
);
2389 xtensa_queue_exec_ins(xtensa
, XT_INS_DHWBI(xtensa
, XT_REG_A3
, 0));
2390 if (!same_dc_line
) {
2391 LOG_TARGET_DEBUG(target
,
2392 "DHWBI second dcache line for address "TARGET_ADDR_FMT
,
2394 xtensa_queue_exec_ins(xtensa
, XT_INS_DHWBI(xtensa
, XT_REG_A3
, 4));
2398 xtensa_queue_exec_ins(xtensa
, XT_INS_IHI(xtensa
, XT_REG_A3
, 0));
2399 if (!same_ic_line
) {
2400 LOG_TARGET_DEBUG(target
,
2401 "IHI second icache line for address "TARGET_ADDR_FMT
,
2403 xtensa_queue_exec_ins(xtensa
, XT_INS_IHI(xtensa
, XT_REG_A3
, 4));
2407 /* Execute invalidate instructions */
2408 ret
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2409 xtensa_core_status_check(target
);
2410 if (ret
!= ERROR_OK
) {
2411 LOG_ERROR("Error issuing cache invaldate instruction(s): %d", ret
);
2416 /* Write new instructions to memory */
2417 ret
= target_write_buffer(target
, address
, size
, buffer
);
2418 if (ret
!= ERROR_OK
) {
2419 LOG_TARGET_ERROR(target
, "Error writing instruction to memory: %d", ret
);
2424 /* Flush dcache so instruction propagates. A3 may be corrupted during memory write */
2425 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, address
);
2426 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
2427 xtensa_queue_exec_ins(xtensa
, XT_INS_DHWB(xtensa
, XT_REG_A3
, 0));
2428 LOG_DEBUG("DHWB dcache line for address "TARGET_ADDR_FMT
, address
);
2429 if (!same_dc_line
) {
2430 LOG_TARGET_DEBUG(target
, "DHWB second dcache line for address "TARGET_ADDR_FMT
, address
+ 4);
2431 xtensa_queue_exec_ins(xtensa
, XT_INS_DHWB(xtensa
, XT_REG_A3
, 4));
2434 /* Execute invalidate instructions */
2435 ret
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2436 xtensa_core_status_check(target
);
2439 /* TODO: Handle L2 cache if present */
2443 static int xtensa_sw_breakpoint_add(struct target
*target
,
2444 struct breakpoint
*breakpoint
,
2445 struct xtensa_sw_breakpoint
*sw_bp
)
2447 struct xtensa
*xtensa
= target_to_xtensa(target
);
2448 int ret
= target_read_buffer(target
, breakpoint
->address
, XT_ISNS_SZ_MAX
, sw_bp
->insn
);
2449 if (ret
!= ERROR_OK
) {
2450 LOG_TARGET_ERROR(target
, "Failed to read original instruction (%d)!", ret
);
2454 sw_bp
->insn_sz
= MIN(XT_ISNS_SZ_MAX
, breakpoint
->length
);
2455 sw_bp
->oocd_bp
= breakpoint
;
2457 uint32_t break_insn
= sw_bp
->insn_sz
== XT_ISNS_SZ_MAX
? XT_INS_BREAK(xtensa
, 0, 0) : XT_INS_BREAKN(xtensa
, 0);
2459 /* Underlying memory write will convert instruction endianness, don't do that here */
2460 ret
= xtensa_update_instruction(target
, breakpoint
->address
, sw_bp
->insn_sz
, (uint8_t *)&break_insn
);
2461 if (ret
!= ERROR_OK
) {
2462 LOG_TARGET_ERROR(target
, "Failed to write breakpoint instruction (%d)!", ret
);
2469 static int xtensa_sw_breakpoint_remove(struct target
*target
, struct xtensa_sw_breakpoint
*sw_bp
)
2471 int ret
= xtensa_update_instruction(target
, sw_bp
->oocd_bp
->address
, sw_bp
->insn_sz
, sw_bp
->insn
);
2472 if (ret
!= ERROR_OK
) {
2473 LOG_TARGET_ERROR(target
, "Failed to write insn (%d)!", ret
);
2476 sw_bp
->oocd_bp
= NULL
;
2480 int xtensa_breakpoint_add(struct target
*target
, struct breakpoint
*breakpoint
)
2482 struct xtensa
*xtensa
= target_to_xtensa(target
);
2485 if (breakpoint
->type
== BKPT_SOFT
) {
2486 for (slot
= 0; slot
< XT_SW_BREAKPOINTS_MAX_NUM
; slot
++) {
2487 if (!xtensa
->sw_brps
[slot
].oocd_bp
||
2488 xtensa
->sw_brps
[slot
].oocd_bp
== breakpoint
)
2491 if (slot
== XT_SW_BREAKPOINTS_MAX_NUM
) {
2492 LOG_TARGET_WARNING(target
, "No free slots to add SW breakpoint!");
2493 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2495 int ret
= xtensa_sw_breakpoint_add(target
, breakpoint
, &xtensa
->sw_brps
[slot
]);
2496 if (ret
!= ERROR_OK
) {
2497 LOG_TARGET_ERROR(target
, "Failed to add SW breakpoint!");
2500 LOG_TARGET_DEBUG(target
, "placed SW breakpoint %u @ " TARGET_ADDR_FMT
,
2502 breakpoint
->address
);
2506 for (slot
= 0; slot
< xtensa
->core_config
->debug
.ibreaks_num
; slot
++) {
2507 if (!xtensa
->hw_brps
[slot
] || xtensa
->hw_brps
[slot
] == breakpoint
)
2510 if (slot
== xtensa
->core_config
->debug
.ibreaks_num
) {
2511 LOG_TARGET_ERROR(target
, "No free slots to add HW breakpoint!");
2512 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2515 xtensa
->hw_brps
[slot
] = breakpoint
;
2516 /* We will actually write the breakpoints when we resume the target. */
2517 LOG_TARGET_DEBUG(target
, "placed HW breakpoint %u @ " TARGET_ADDR_FMT
,
2519 breakpoint
->address
);
2524 int xtensa_breakpoint_remove(struct target
*target
, struct breakpoint
*breakpoint
)
2526 struct xtensa
*xtensa
= target_to_xtensa(target
);
2529 if (breakpoint
->type
== BKPT_SOFT
) {
2530 for (slot
= 0; slot
< XT_SW_BREAKPOINTS_MAX_NUM
; slot
++) {
2531 if (xtensa
->sw_brps
[slot
].oocd_bp
&& xtensa
->sw_brps
[slot
].oocd_bp
== breakpoint
)
2534 if (slot
== XT_SW_BREAKPOINTS_MAX_NUM
) {
2535 LOG_TARGET_WARNING(target
, "Max SW breakpoints slot reached, slot=%u!", slot
);
2536 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2538 int ret
= xtensa_sw_breakpoint_remove(target
, &xtensa
->sw_brps
[slot
]);
2539 if (ret
!= ERROR_OK
) {
2540 LOG_TARGET_ERROR(target
, "Failed to remove SW breakpoint (%d)!", ret
);
2543 LOG_TARGET_DEBUG(target
, "cleared SW breakpoint %u @ " TARGET_ADDR_FMT
, slot
, breakpoint
->address
);
2547 for (slot
= 0; slot
< xtensa
->core_config
->debug
.ibreaks_num
; slot
++) {
2548 if (xtensa
->hw_brps
[slot
] == breakpoint
)
2551 if (slot
== xtensa
->core_config
->debug
.ibreaks_num
) {
2552 LOG_TARGET_ERROR(target
, "HW breakpoint not found!");
2553 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2555 xtensa
->hw_brps
[slot
] = NULL
;
2556 if (xtensa
->core_config
->core_type
== XT_NX
)
2557 xtensa_reg_set(target
, xtensa
->nx_reg_idx
[XT_NX_REG_IDX_IBREAKC0
] + slot
, 0);
2558 LOG_TARGET_DEBUG(target
, "cleared HW breakpoint %u @ " TARGET_ADDR_FMT
, slot
, breakpoint
->address
);
2562 int xtensa_watchpoint_add(struct target
*target
, struct watchpoint
*watchpoint
)
2564 struct xtensa
*xtensa
= target_to_xtensa(target
);
2566 xtensa_reg_val_t dbreakcval
;
2568 if (target
->state
!= TARGET_HALTED
) {
2569 LOG_TARGET_ERROR(target
, "not halted");
2570 return ERROR_TARGET_NOT_HALTED
;
2573 if (watchpoint
->mask
!= ~(uint32_t)0) {
2574 LOG_TARGET_ERROR(target
, "watchpoint value masks not supported");
2575 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2578 for (slot
= 0; slot
< xtensa
->core_config
->debug
.dbreaks_num
; slot
++) {
2579 if (!xtensa
->hw_wps
[slot
] || xtensa
->hw_wps
[slot
] == watchpoint
)
2582 if (slot
== xtensa
->core_config
->debug
.dbreaks_num
) {
2583 LOG_TARGET_WARNING(target
, "No free slots to add HW watchpoint!");
2584 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2587 /* Figure out value for dbreakc5..0
2588 * It's basically 0x3F with an incremental bit removed from the LSB for each extra length power of 2. */
2589 if (watchpoint
->length
< 1 || watchpoint
->length
> 64 ||
2590 !IS_PWR_OF_2(watchpoint
->length
) ||
2591 !IS_ALIGNED(watchpoint
->address
, watchpoint
->length
)) {
2594 "Watchpoint with length %d on address " TARGET_ADDR_FMT
2595 " not supported by hardware.",
2597 watchpoint
->address
);
2598 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2600 dbreakcval
= ALIGN_DOWN(0x3F, watchpoint
->length
);
2602 if (watchpoint
->rw
== WPT_READ
)
2603 dbreakcval
|= BIT(30);
2604 if (watchpoint
->rw
== WPT_WRITE
)
2605 dbreakcval
|= BIT(31);
2606 if (watchpoint
->rw
== WPT_ACCESS
)
2607 dbreakcval
|= BIT(30) | BIT(31);
2609 /* Write DBREAKA[slot] and DBCREAKC[slot] */
2610 xtensa_reg_set(target
, XT_REG_IDX_DBREAKA0
+ slot
, watchpoint
->address
);
2611 xtensa_reg_set(target
, XT_REG_IDX_DBREAKC0
+ slot
, dbreakcval
);
2612 xtensa
->hw_wps
[slot
] = watchpoint
;
2613 LOG_TARGET_DEBUG(target
, "placed HW watchpoint @ " TARGET_ADDR_FMT
,
2614 watchpoint
->address
);
2618 int xtensa_watchpoint_remove(struct target
*target
, struct watchpoint
*watchpoint
)
2620 struct xtensa
*xtensa
= target_to_xtensa(target
);
2623 for (slot
= 0; slot
< xtensa
->core_config
->debug
.dbreaks_num
; slot
++) {
2624 if (xtensa
->hw_wps
[slot
] == watchpoint
)
2627 if (slot
== xtensa
->core_config
->debug
.dbreaks_num
) {
2628 LOG_TARGET_WARNING(target
, "HW watchpoint " TARGET_ADDR_FMT
" not found!", watchpoint
->address
);
2629 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2631 xtensa_reg_set(target
, XT_REG_IDX_DBREAKC0
+ slot
, 0);
2632 xtensa
->hw_wps
[slot
] = NULL
;
2633 LOG_TARGET_DEBUG(target
, "cleared HW watchpoint @ " TARGET_ADDR_FMT
,
2634 watchpoint
->address
);
2638 static int xtensa_build_reg_cache(struct target
*target
)
2640 struct xtensa
*xtensa
= target_to_xtensa(target
);
2641 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2642 unsigned int last_dbreg_num
= 0;
2644 if (xtensa
->core_regs_num
+ xtensa
->num_optregs
!= xtensa
->total_regs_num
)
2645 LOG_TARGET_WARNING(target
, "Register count MISMATCH: %d core regs, %d extended regs; %d expected",
2646 xtensa
->core_regs_num
, xtensa
->num_optregs
, xtensa
->total_regs_num
);
2648 struct reg_cache
*reg_cache
= calloc(1, sizeof(struct reg_cache
));
2651 LOG_ERROR("Failed to alloc reg cache!");
2654 reg_cache
->name
= "Xtensa registers";
2655 reg_cache
->next
= NULL
;
2657 unsigned int reg_list_size
= XT_NUM_REGS
+ xtensa
->num_optregs
;
2658 struct reg
*reg_list
= calloc(reg_list_size
, sizeof(struct reg
));
2660 LOG_ERROR("Failed to alloc reg list!");
2663 xtensa
->dbregs_num
= 0;
2664 unsigned int didx
= 0;
2665 for (unsigned int whichlist
= 0; whichlist
< 2; whichlist
++) {
2666 struct xtensa_reg_desc
*rlist
= (whichlist
== 0) ? xtensa_regs
: xtensa
->optregs
;
2667 unsigned int listsize
= (whichlist
== 0) ? XT_NUM_REGS
: xtensa
->num_optregs
;
2668 for (unsigned int i
= 0; i
< listsize
; i
++, didx
++) {
2669 reg_list
[didx
].exist
= rlist
[i
].exist
;
2670 reg_list
[didx
].name
= rlist
[i
].name
;
2671 reg_list
[didx
].size
= 32;
2672 reg_list
[didx
].value
= calloc(1, 4 /*XT_REG_LEN*/); /* make Clang Static Analyzer happy */
2673 if (!reg_list
[didx
].value
) {
2674 LOG_ERROR("Failed to alloc reg list value!");
2677 reg_list
[didx
].dirty
= false;
2678 reg_list
[didx
].valid
= false;
2679 reg_list
[didx
].type
= &xtensa_reg_type
;
2680 reg_list
[didx
].arch_info
= xtensa
;
2681 if (rlist
[i
].exist
&& (rlist
[i
].dbreg_num
> last_dbreg_num
))
2682 last_dbreg_num
= rlist
[i
].dbreg_num
;
2684 if (xtensa_extra_debug_log
) {
2685 LOG_TARGET_DEBUG(target
,
2686 "POPULATE %-16s list %d exist %d, idx %d, type %d, dbreg_num 0x%04x",
2687 reg_list
[didx
].name
,
2689 reg_list
[didx
].exist
,
2692 rlist
[i
].dbreg_num
);
2697 xtensa
->dbregs_num
= last_dbreg_num
+ 1;
2698 reg_cache
->reg_list
= reg_list
;
2699 reg_cache
->num_regs
= reg_list_size
;
2701 LOG_TARGET_DEBUG(target
, "xtensa->total_regs_num %d reg_list_size %d xtensa->dbregs_num %d",
2702 xtensa
->total_regs_num
, reg_list_size
, xtensa
->dbregs_num
);
2704 /* Construct empty-register list for handling unknown register requests */
2705 xtensa
->empty_regs
= calloc(xtensa
->dbregs_num
, sizeof(struct reg
));
2706 if (!xtensa
->empty_regs
) {
2707 LOG_TARGET_ERROR(target
, "ERROR: Out of memory");
2710 for (unsigned int i
= 0; i
< xtensa
->dbregs_num
; i
++) {
2711 xtensa
->empty_regs
[i
].name
= calloc(8, sizeof(char));
2712 if (!xtensa
->empty_regs
[i
].name
) {
2713 LOG_TARGET_ERROR(target
, "ERROR: Out of memory");
2716 sprintf((char *)xtensa
->empty_regs
[i
].name
, "?0x%04x", i
& 0x0000FFFF);
2717 xtensa
->empty_regs
[i
].size
= 32;
2718 xtensa
->empty_regs
[i
].type
= &xtensa_reg_type
;
2719 xtensa
->empty_regs
[i
].value
= calloc(1, 4 /*XT_REG_LEN*/); /* make Clang Static Analyzer happy */
2720 if (!xtensa
->empty_regs
[i
].value
) {
2721 LOG_ERROR("Failed to alloc empty reg list value!");
2724 xtensa
->empty_regs
[i
].arch_info
= xtensa
;
2727 /* Construct contiguous register list from contiguous descriptor list */
2728 if (xtensa
->regmap_contiguous
&& xtensa
->contiguous_regs_desc
) {
2729 xtensa
->contiguous_regs_list
= calloc(xtensa
->total_regs_num
, sizeof(struct reg
*));
2730 if (!xtensa
->contiguous_regs_list
) {
2731 LOG_TARGET_ERROR(target
, "ERROR: Out of memory");
2734 for (unsigned int i
= 0; i
< xtensa
->total_regs_num
; i
++) {
2736 for (j
= 0; j
< reg_cache
->num_regs
; j
++) {
2737 if (!strcmp(reg_cache
->reg_list
[j
].name
, xtensa
->contiguous_regs_desc
[i
]->name
)) {
2738 /* Register number field is not filled above.
2739 Here we are assigning the corresponding index from the contiguous reg list.
2740 These indexes are in the same order with gdb g-packet request/response.
2741 Some more changes may be required for sparse reg lists.
2743 reg_cache
->reg_list
[j
].number
= i
;
2744 xtensa
->contiguous_regs_list
[i
] = &(reg_cache
->reg_list
[j
]);
2745 LOG_TARGET_DEBUG(target
,
2746 "POPULATE contiguous regs list: %-16s, dbreg_num 0x%04x",
2747 xtensa
->contiguous_regs_list
[i
]->name
,
2748 xtensa
->contiguous_regs_desc
[i
]->dbreg_num
);
2752 if (j
== reg_cache
->num_regs
)
2753 LOG_TARGET_WARNING(target
, "contiguous register %s not found",
2754 xtensa
->contiguous_regs_desc
[i
]->name
);
2758 xtensa
->algo_context_backup
= calloc(reg_cache
->num_regs
, sizeof(void *));
2759 if (!xtensa
->algo_context_backup
) {
2760 LOG_ERROR("Failed to alloc mem for algorithm context backup!");
2763 for (unsigned int i
= 0; i
< reg_cache
->num_regs
; i
++) {
2764 struct reg
*reg
= ®_cache
->reg_list
[i
];
2765 xtensa
->algo_context_backup
[i
] = calloc(1, reg
->size
/ 8);
2766 if (!xtensa
->algo_context_backup
[i
]) {
2767 LOG_ERROR("Failed to alloc mem for algorithm context!");
2771 xtensa
->core_cache
= reg_cache
;
2773 *cache_p
= reg_cache
;
2778 for (unsigned int i
= 0; i
< reg_list_size
; i
++)
2779 free(reg_list
[i
].value
);
2782 if (xtensa
->empty_regs
) {
2783 for (unsigned int i
= 0; i
< xtensa
->dbregs_num
; i
++) {
2784 free((void *)xtensa
->empty_regs
[i
].name
);
2785 free(xtensa
->empty_regs
[i
].value
);
2787 free(xtensa
->empty_regs
);
2789 if (xtensa
->algo_context_backup
) {
2790 for (unsigned int i
= 0; i
< reg_cache
->num_regs
; i
++)
2791 free(xtensa
->algo_context_backup
[i
]);
2792 free(xtensa
->algo_context_backup
);
2799 static int32_t xtensa_gdbqc_parse_exec_tie_ops(struct target
*target
, char *opstr
)
2801 struct xtensa
*xtensa
= target_to_xtensa(target
);
2802 int32_t status
= ERROR_COMMAND_ARGUMENT_INVALID
;
2803 /* Process op[] list */
2804 while (opstr
&& (*opstr
== ':')) {
2806 unsigned int oplen
= strtoul(opstr
+ 1, &opstr
, 16);
2808 LOG_TARGET_ERROR(target
, "TIE access instruction too long (%d)\n", oplen
);
2812 while ((i
< oplen
) && opstr
&& (*opstr
== ':'))
2813 ops
[i
++] = strtoul(opstr
+ 1, &opstr
, 16);
2815 LOG_TARGET_ERROR(target
, "TIE access instruction malformed (%d)\n", i
);
2820 sprintf(insn_buf
, "Exec %d-byte TIE sequence: ", oplen
);
2821 for (i
= 0; i
< oplen
; i
++)
2822 sprintf(insn_buf
+ strlen(insn_buf
), "%02x:", ops
[i
]);
2823 LOG_TARGET_DEBUG(target
, "%s", insn_buf
);
2824 xtensa_queue_exec_ins_wide(xtensa
, ops
, oplen
); /* Handles endian-swap */
2830 static int xtensa_gdbqc_qxtreg(struct target
*target
, const char *packet
, char **response_p
)
2832 struct xtensa
*xtensa
= target_to_xtensa(target
);
2833 bool iswrite
= (packet
[0] == 'Q');
2834 enum xtensa_qerr_e error
;
2836 /* Read/write TIE register. Requires spill location.
2837 * qxtreg<num>:<len>:<oplen>:<op[0]>:<...>[:<oplen>:<op[0]>:<...>]
2838 * Qxtreg<num>:<len>:<oplen>:<op[0]>:<...>[:<oplen>:<op[0]>:<...>]=<value>
2840 if (!(xtensa
->spill_buf
)) {
2841 LOG_ERROR("Spill location not specified. Try 'target remote <host>:3333 &spill_location0'");
2842 error
= XT_QERR_FAIL
;
2843 goto xtensa_gdbqc_qxtreg_fail
;
2847 uint32_t regnum
= strtoul(packet
+ 6, &delim
, 16);
2848 if (*delim
!= ':') {
2849 LOG_ERROR("Malformed qxtreg packet");
2850 error
= XT_QERR_INVAL
;
2851 goto xtensa_gdbqc_qxtreg_fail
;
2853 uint32_t reglen
= strtoul(delim
+ 1, &delim
, 16);
2854 if (*delim
!= ':') {
2855 LOG_ERROR("Malformed qxtreg packet");
2856 error
= XT_QERR_INVAL
;
2857 goto xtensa_gdbqc_qxtreg_fail
;
2859 uint8_t regbuf
[XT_QUERYPKT_RESP_MAX
];
2860 memset(regbuf
, 0, XT_QUERYPKT_RESP_MAX
);
2861 LOG_DEBUG("TIE reg 0x%08" PRIx32
" %s (%d bytes)", regnum
, iswrite
? "write" : "read", reglen
);
2862 if (reglen
* 2 + 1 > XT_QUERYPKT_RESP_MAX
) {
2863 LOG_ERROR("TIE register too large");
2864 error
= XT_QERR_MEM
;
2865 goto xtensa_gdbqc_qxtreg_fail
;
2868 /* (1) Save spill memory, (1.5) [if write then store value to spill location],
2869 * (2) read old a4, (3) write spill address to a4.
2870 * NOTE: ensure a4 is restored properly by all error handling logic
2872 unsigned int memop_size
= (xtensa
->spill_loc
& 3) ? 1 : 4;
2873 int status
= xtensa_read_memory(target
, xtensa
->spill_loc
, memop_size
,
2874 xtensa
->spill_bytes
/ memop_size
, xtensa
->spill_buf
);
2875 if (status
!= ERROR_OK
) {
2876 LOG_ERROR("Spill memory save");
2877 error
= XT_QERR_MEM
;
2878 goto xtensa_gdbqc_qxtreg_fail
;
2881 /* Extract value and store in spill memory */
2883 char *valbuf
= strchr(delim
, '=');
2884 if (!(valbuf
&& (*valbuf
== '='))) {
2885 LOG_ERROR("Malformed Qxtreg packet");
2886 error
= XT_QERR_INVAL
;
2887 goto xtensa_gdbqc_qxtreg_fail
;
2890 while (*valbuf
&& *(valbuf
+ 1)) {
2891 char bytestr
[3] = { 0, 0, 0 };
2892 strncpy(bytestr
, valbuf
, 2);
2893 regbuf
[b
++] = strtoul(bytestr
, NULL
, 16);
2897 LOG_ERROR("Malformed Qxtreg packet");
2898 error
= XT_QERR_INVAL
;
2899 goto xtensa_gdbqc_qxtreg_fail
;
2901 status
= xtensa_write_memory(target
, xtensa
->spill_loc
, memop_size
,
2902 reglen
/ memop_size
, regbuf
);
2903 if (status
!= ERROR_OK
) {
2904 LOG_ERROR("TIE value store");
2905 error
= XT_QERR_MEM
;
2906 goto xtensa_gdbqc_qxtreg_fail
;
2909 xtensa_reg_val_t orig_a4
= xtensa_reg_get(target
, XT_REG_IDX_A4
);
2910 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, xtensa
->spill_loc
);
2911 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A4
));
2913 int32_t tieop_status
= xtensa_gdbqc_parse_exec_tie_ops(target
, delim
);
2915 /* Restore a4 but not yet spill memory. Execute it all... */
2916 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, orig_a4
);
2917 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A4
));
2918 status
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
2919 if (status
!= ERROR_OK
) {
2920 LOG_TARGET_ERROR(target
, "TIE queue execute: %d\n", status
);
2921 tieop_status
= status
;
2923 status
= xtensa_core_status_check(target
);
2924 if (status
!= ERROR_OK
) {
2925 LOG_TARGET_ERROR(target
, "TIE instr execute: %d\n", status
);
2926 tieop_status
= status
;
2929 if (tieop_status
== ERROR_OK
) {
2931 /* TIE write succeeded; send OK */
2932 strcpy(*response_p
, "OK");
2934 /* TIE read succeeded; copy result from spill memory */
2935 status
= xtensa_read_memory(target
, xtensa
->spill_loc
, memop_size
, reglen
, regbuf
);
2936 if (status
!= ERROR_OK
) {
2937 LOG_TARGET_ERROR(target
, "TIE result read");
2938 tieop_status
= status
;
2941 for (i
= 0; i
< reglen
; i
++)
2942 sprintf(*response_p
+ 2 * i
, "%02x", regbuf
[i
]);
2943 *(*response_p
+ 2 * i
) = '\0';
2944 LOG_TARGET_DEBUG(target
, "TIE response: %s", *response_p
);
2948 /* Restore spill memory first, then report any previous errors */
2949 status
= xtensa_write_memory(target
, xtensa
->spill_loc
, memop_size
,
2950 xtensa
->spill_bytes
/ memop_size
, xtensa
->spill_buf
);
2951 if (status
!= ERROR_OK
) {
2952 LOG_ERROR("Spill memory restore");
2953 error
= XT_QERR_MEM
;
2954 goto xtensa_gdbqc_qxtreg_fail
;
2956 if (tieop_status
!= ERROR_OK
) {
2957 LOG_ERROR("TIE execution");
2958 error
= XT_QERR_FAIL
;
2959 goto xtensa_gdbqc_qxtreg_fail
;
2963 xtensa_gdbqc_qxtreg_fail
:
2964 strcpy(*response_p
, xt_qerr
[error
].chrval
);
2965 return xt_qerr
[error
].intval
;
2968 int xtensa_gdb_query_custom(struct target
*target
, const char *packet
, char **response_p
)
2970 struct xtensa
*xtensa
= target_to_xtensa(target
);
2971 enum xtensa_qerr_e error
;
2972 if (!packet
|| !response_p
) {
2973 LOG_TARGET_ERROR(target
, "invalid parameter: packet %p response_p %p", packet
, response_p
);
2977 *response_p
= xtensa
->qpkt_resp
;
2978 if (strncmp(packet
, "qxtn", 4) == 0) {
2979 strcpy(*response_p
, "OpenOCD");
2981 } else if (strncasecmp(packet
, "qxtgdbversion=", 14) == 0) {
2983 } else if ((strncmp(packet
, "Qxtsis=", 7) == 0) || (strncmp(packet
, "Qxtsds=", 7) == 0)) {
2984 /* Confirm host cache params match core .cfg file */
2985 struct xtensa_cache_config
*cachep
= (packet
[4] == 'i') ?
2986 &xtensa
->core_config
->icache
: &xtensa
->core_config
->dcache
;
2987 unsigned int line_size
= 0, size
= 0, way_count
= 0;
2988 sscanf(&packet
[7], "%x,%x,%x", &line_size
, &size
, &way_count
);
2989 if ((cachep
->line_size
!= line_size
) ||
2990 (cachep
->size
!= size
) ||
2991 (cachep
->way_count
!= way_count
)) {
2992 LOG_TARGET_WARNING(target
, "%cCache mismatch; check xtensa-core-XXX.cfg file",
2993 cachep
== &xtensa
->core_config
->icache
? 'I' : 'D');
2995 strcpy(*response_p
, "OK");
2997 } else if ((strncmp(packet
, "Qxtiram=", 8) == 0) || (strncmp(packet
, "Qxtirom=", 8) == 0)) {
2998 /* Confirm host IRAM/IROM params match core .cfg file */
2999 struct xtensa_local_mem_config
*memp
= (packet
[5] == 'a') ?
3000 &xtensa
->core_config
->iram
: &xtensa
->core_config
->irom
;
3001 unsigned int base
= 0, size
= 0, i
;
3002 char *pkt
= (char *)&packet
[7];
3005 size
= strtoul(pkt
, &pkt
, 16);
3007 base
= strtoul(pkt
, &pkt
, 16);
3008 LOG_TARGET_DEBUG(target
, "memcheck: %dB @ 0x%08x", size
, base
);
3009 for (i
= 0; i
< memp
->count
; i
++) {
3010 if ((memp
->regions
[i
].base
== base
) && (memp
->regions
[i
].size
== size
))
3013 if (i
== memp
->count
) {
3014 LOG_TARGET_WARNING(target
, "%s mismatch; check xtensa-core-XXX.cfg file",
3015 memp
== &xtensa
->core_config
->iram
? "IRAM" : "IROM");
3018 for (i
= 0; i
< 11; i
++) {
3020 strtoul(pkt
, &pkt
, 16);
3022 } while (pkt
&& (pkt
[0] == ','));
3023 strcpy(*response_p
, "OK");
3025 } else if (strncmp(packet
, "Qxtexcmlvl=", 11) == 0) {
3026 /* Confirm host EXCM_LEVEL matches core .cfg file */
3027 unsigned int excm_level
= strtoul(&packet
[11], NULL
, 0);
3028 if (!xtensa
->core_config
->high_irq
.enabled
||
3029 (excm_level
!= xtensa
->core_config
->high_irq
.excm_level
))
3030 LOG_TARGET_WARNING(target
, "EXCM_LEVEL mismatch; check xtensa-core-XXX.cfg file");
3031 strcpy(*response_p
, "OK");
3033 } else if ((strncmp(packet
, "Qxtl2cs=", 8) == 0) ||
3034 (strncmp(packet
, "Qxtl2ca=", 8) == 0) ||
3035 (strncmp(packet
, "Qxtdensity=", 11) == 0)) {
3036 strcpy(*response_p
, "OK");
3038 } else if (strncmp(packet
, "Qxtspill=", 9) == 0) {
3040 uint32_t spill_loc
= strtoul(packet
+ 9, &delim
, 16);
3041 if (*delim
!= ':') {
3042 LOG_ERROR("Malformed Qxtspill packet");
3043 error
= XT_QERR_INVAL
;
3044 goto xtensa_gdb_query_custom_fail
;
3046 xtensa
->spill_loc
= spill_loc
;
3047 xtensa
->spill_bytes
= strtoul(delim
+ 1, NULL
, 16);
3048 if (xtensa
->spill_buf
)
3049 free(xtensa
->spill_buf
);
3050 xtensa
->spill_buf
= calloc(1, xtensa
->spill_bytes
);
3051 if (!xtensa
->spill_buf
) {
3052 LOG_ERROR("Spill buf alloc");
3053 error
= XT_QERR_MEM
;
3054 goto xtensa_gdb_query_custom_fail
;
3056 LOG_TARGET_DEBUG(target
, "Set spill 0x%08" PRIx32
" (%d)", xtensa
->spill_loc
, xtensa
->spill_bytes
);
3057 strcpy(*response_p
, "OK");
3059 } else if (strncasecmp(packet
, "qxtreg", 6) == 0) {
3060 return xtensa_gdbqc_qxtreg(target
, packet
, response_p
);
3061 } else if ((strncmp(packet
, "qTStatus", 8) == 0) ||
3062 (strncmp(packet
, "qxtftie", 7) == 0) ||
3063 (strncmp(packet
, "qxtstie", 7) == 0)) {
3064 /* Return empty string to indicate trace, TIE wire debug are unsupported */
3065 strcpy(*response_p
, "");
3069 /* Warn for all other queries, but do not return errors */
3070 LOG_TARGET_WARNING(target
, "Unknown target-specific query packet: %s", packet
);
3071 strcpy(*response_p
, "");
3074 xtensa_gdb_query_custom_fail
:
3075 strcpy(*response_p
, xt_qerr
[error
].chrval
);
3076 return xt_qerr
[error
].intval
;
3079 int xtensa_init_arch_info(struct target
*target
, struct xtensa
*xtensa
,
3080 const struct xtensa_debug_module_config
*dm_cfg
)
3082 target
->arch_info
= xtensa
;
3083 xtensa
->common_magic
= XTENSA_COMMON_MAGIC
;
3084 xtensa
->target
= target
;
3085 xtensa
->stepping_isr_mode
= XT_STEPPING_ISR_ON
;
3087 xtensa
->core_config
= calloc(1, sizeof(struct xtensa_config
));
3088 if (!xtensa
->core_config
) {
3089 LOG_ERROR("Xtensa configuration alloc failed\n");
3093 /* Default cache settings are disabled with 1 way */
3094 xtensa
->core_config
->icache
.way_count
= 1;
3095 xtensa
->core_config
->dcache
.way_count
= 1;
3097 /* chrval: AR3/AR4 register names will change with window mapping.
3098 * intval: tracks whether scratch register was set through gdb P packet.
3100 for (enum xtensa_ar_scratch_set_e s
= 0; s
< XT_AR_SCRATCH_NUM
; s
++) {
3101 xtensa
->scratch_ars
[s
].chrval
= calloc(8, sizeof(char));
3102 if (!xtensa
->scratch_ars
[s
].chrval
) {
3103 for (enum xtensa_ar_scratch_set_e f
= 0; f
< s
; f
++)
3104 free(xtensa
->scratch_ars
[f
].chrval
);
3105 free(xtensa
->core_config
);
3106 LOG_ERROR("Xtensa scratch AR alloc failed\n");
3109 xtensa
->scratch_ars
[s
].intval
= false;
3110 sprintf(xtensa
->scratch_ars
[s
].chrval
, "%s%d",
3111 ((s
== XT_AR_SCRATCH_A3
) || (s
== XT_AR_SCRATCH_A4
)) ? "a" : "ar",
3112 ((s
== XT_AR_SCRATCH_A3
) || (s
== XT_AR_SCRATCH_AR3
)) ? 3 : 4);
3115 return xtensa_dm_init(&xtensa
->dbg_mod
, dm_cfg
);
3118 void xtensa_set_permissive_mode(struct target
*target
, bool state
)
3120 target_to_xtensa(target
)->permissive_mode
= state
;
3123 int xtensa_target_init(struct command_context
*cmd_ctx
, struct target
*target
)
3125 struct xtensa
*xtensa
= target_to_xtensa(target
);
3127 xtensa
->come_online_probes_num
= 3;
3128 xtensa
->hw_brps
= calloc(XT_HW_IBREAK_MAX_NUM
, sizeof(struct breakpoint
*));
3129 if (!xtensa
->hw_brps
) {
3130 LOG_ERROR("Failed to alloc memory for HW breakpoints!");
3133 xtensa
->hw_wps
= calloc(XT_HW_DBREAK_MAX_NUM
, sizeof(struct watchpoint
*));
3134 if (!xtensa
->hw_wps
) {
3135 free(xtensa
->hw_brps
);
3136 LOG_ERROR("Failed to alloc memory for HW watchpoints!");
3139 xtensa
->sw_brps
= calloc(XT_SW_BREAKPOINTS_MAX_NUM
, sizeof(struct xtensa_sw_breakpoint
));
3140 if (!xtensa
->sw_brps
) {
3141 free(xtensa
->hw_brps
);
3142 free(xtensa
->hw_wps
);
3143 LOG_ERROR("Failed to alloc memory for SW breakpoints!");
3147 xtensa
->spill_loc
= 0xffffffff;
3148 xtensa
->spill_bytes
= 0;
3149 xtensa
->spill_buf
= NULL
;
3150 xtensa
->probe_lsddr32p
= -1; /* Probe for fast load/store operations */
3152 return xtensa_build_reg_cache(target
);
3155 static void xtensa_free_reg_cache(struct target
*target
)
3157 struct xtensa
*xtensa
= target_to_xtensa(target
);
3158 struct reg_cache
*cache
= xtensa
->core_cache
;
3161 register_unlink_cache(&target
->reg_cache
, cache
);
3162 for (unsigned int i
= 0; i
< cache
->num_regs
; i
++) {
3163 free(xtensa
->algo_context_backup
[i
]);
3164 free(cache
->reg_list
[i
].value
);
3166 free(xtensa
->algo_context_backup
);
3167 free(cache
->reg_list
);
3170 xtensa
->core_cache
= NULL
;
3171 xtensa
->algo_context_backup
= NULL
;
3173 if (xtensa
->empty_regs
) {
3174 for (unsigned int i
= 0; i
< xtensa
->dbregs_num
; i
++) {
3175 free((void *)xtensa
->empty_regs
[i
].name
);
3176 free(xtensa
->empty_regs
[i
].value
);
3178 free(xtensa
->empty_regs
);
3180 xtensa
->empty_regs
= NULL
;
3181 if (xtensa
->optregs
) {
3182 for (unsigned int i
= 0; i
< xtensa
->num_optregs
; i
++)
3183 free((void *)xtensa
->optregs
[i
].name
);
3184 free(xtensa
->optregs
);
3186 xtensa
->optregs
= NULL
;
3189 void xtensa_target_deinit(struct target
*target
)
3191 struct xtensa
*xtensa
= target_to_xtensa(target
);
3195 if (target_was_examined(target
)) {
3196 int ret
= xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DCRCLR
, OCDDCR_ENABLEOCD
);
3197 if (ret
!= ERROR_OK
) {
3198 LOG_ERROR("Failed to queue OCDDCR_ENABLEOCD clear operation!");
3201 xtensa_dm_queue_tdi_idle(&xtensa
->dbg_mod
);
3202 ret
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
3203 if (ret
!= ERROR_OK
) {
3204 LOG_ERROR("Failed to clear OCDDCR_ENABLEOCD!");
3207 xtensa_dm_deinit(&xtensa
->dbg_mod
);
3209 xtensa_free_reg_cache(target
);
3210 free(xtensa
->hw_brps
);
3211 free(xtensa
->hw_wps
);
3212 free(xtensa
->sw_brps
);
3213 if (xtensa
->spill_buf
) {
3214 free(xtensa
->spill_buf
);
3215 xtensa
->spill_buf
= NULL
;
3217 for (enum xtensa_ar_scratch_set_e s
= 0; s
< XT_AR_SCRATCH_NUM
; s
++)
3218 free(xtensa
->scratch_ars
[s
].chrval
);
3219 free(xtensa
->core_config
);
3222 const char *xtensa_get_gdb_arch(struct target
*target
)
3227 /* exe <ascii-encoded hexadecimal instruction bytes> */
3228 static COMMAND_HELPER(xtensa_cmd_exe_do
, struct target
*target
)
3230 struct xtensa
*xtensa
= target_to_xtensa(target
);
3233 return ERROR_COMMAND_SYNTAX_ERROR
;
3235 /* Process ascii-encoded hex byte string */
3236 const char *parm
= CMD_ARGV
[0];
3237 unsigned int parm_len
= strlen(parm
);
3238 if ((parm_len
>= 64) || (parm_len
& 1)) {
3239 LOG_ERROR("Invalid parameter length (%d): must be even, < 64 characters", parm_len
);
3245 unsigned int oplen
= parm_len
/ 2;
3246 char encoded_byte
[3] = { 0, 0, 0 };
3247 for (unsigned int i
= 0; i
< oplen
; i
++) {
3248 encoded_byte
[0] = *parm
++;
3249 encoded_byte
[1] = *parm
++;
3250 ops
[i
] = strtoul(encoded_byte
, NULL
, 16);
3253 /* GDB must handle state save/restore.
3254 * Flush reg cache in case spill location is in an AR
3255 * Update CPENABLE only for this execution; later restore cached copy
3256 * Keep a copy of exccause in case executed code triggers an exception
3258 int status
= xtensa_write_dirty_registers(target
);
3259 if (status
!= ERROR_OK
) {
3260 LOG_ERROR("%s: Failed to write back register cache.", target_name(target
));
3263 xtensa_reg_val_t exccause
= xtensa_reg_get(target
, XT_REG_IDX_EXCCAUSE
);
3264 xtensa_reg_val_t cpenable
= xtensa_reg_get(target
, XT_REG_IDX_CPENABLE
);
3265 xtensa_reg_val_t a3
= xtensa_reg_get(target
, XT_REG_IDX_A3
);
3266 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, 0xffffffff);
3267 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
3268 xtensa_queue_exec_ins(xtensa
, XT_INS_WSR(xtensa
,
3269 xtensa_regs
[XT_REG_IDX_CPENABLE
].reg_num
, XT_REG_A3
));
3270 xtensa_queue_dbg_reg_write(xtensa
, XDMREG_DDR
, a3
);
3271 xtensa_queue_exec_ins(xtensa
, XT_INS_RSR(xtensa
, XT_SR_DDR
, XT_REG_A3
));
3273 /* Queue instruction list and execute everything */
3274 LOG_TARGET_DEBUG(target
, "execute stub: %s", CMD_ARGV
[0]);
3275 xtensa_queue_exec_ins_wide(xtensa
, ops
, oplen
); /* Handles endian-swap */
3276 status
= xtensa_dm_queue_execute(&xtensa
->dbg_mod
);
3277 if (status
!= ERROR_OK
)
3278 LOG_TARGET_ERROR(target
, "TIE queue execute: %d\n", status
);
3279 status
= xtensa_core_status_check(target
);
3280 if (status
!= ERROR_OK
)
3281 LOG_TARGET_ERROR(target
, "TIE instr execute: %d\n", status
);
3283 /* Reread register cache and restore saved regs after instruction execution */
3284 if (xtensa_fetch_all_regs(target
) != ERROR_OK
)
3285 LOG_TARGET_ERROR(target
, "%s: Failed to fetch register cache (post-exec).", target_name(target
));
3286 xtensa_reg_set(target
, XT_REG_IDX_EXCCAUSE
, exccause
);
3287 xtensa_reg_set(target
, XT_REG_IDX_CPENABLE
, cpenable
);
3291 COMMAND_HANDLER(xtensa_cmd_exe
)
3293 return CALL_COMMAND_HANDLER(xtensa_cmd_exe_do
, get_current_target(CMD_CTX
));
3297 COMMAND_HELPER(xtensa_cmd_xtdef_do
, struct xtensa
*xtensa
)
3300 return ERROR_COMMAND_SYNTAX_ERROR
;
3302 const char *core_name
= CMD_ARGV
[0];
3303 if (strcasecmp(core_name
, "LX") == 0) {
3304 xtensa
->core_config
->core_type
= XT_LX
;
3305 } else if (strcasecmp(core_name
, "NX") == 0) {
3306 xtensa
->core_config
->core_type
= XT_NX
;
3308 LOG_ERROR("xtdef [LX|NX]\n");
3309 return ERROR_COMMAND_SYNTAX_ERROR
;
3314 COMMAND_HANDLER(xtensa_cmd_xtdef
)
3316 return CALL_COMMAND_HANDLER(xtensa_cmd_xtdef_do
,
3317 target_to_xtensa(get_current_target(CMD_CTX
)));
3320 static inline bool xtensa_cmd_xtopt_legal_val(char *opt
, int val
, int min
, int max
)
3322 if ((val
< min
) || (val
> max
)) {
3323 LOG_ERROR("xtopt %s (%d) out of range [%d..%d]\n", opt
, val
, min
, max
);
3329 /* xtopt <name> <value> */
3330 COMMAND_HELPER(xtensa_cmd_xtopt_do
, struct xtensa
*xtensa
)
3333 return ERROR_COMMAND_SYNTAX_ERROR
;
3335 const char *opt_name
= CMD_ARGV
[0];
3336 int opt_val
= strtol(CMD_ARGV
[1], NULL
, 0);
3337 if (strcasecmp(opt_name
, "arnum") == 0) {
3338 if (!xtensa_cmd_xtopt_legal_val("arnum", opt_val
, 0, 64))
3339 return ERROR_COMMAND_ARGUMENT_INVALID
;
3340 xtensa
->core_config
->aregs_num
= opt_val
;
3341 } else if (strcasecmp(opt_name
, "windowed") == 0) {
3342 if (!xtensa_cmd_xtopt_legal_val("windowed", opt_val
, 0, 1))
3343 return ERROR_COMMAND_ARGUMENT_INVALID
;
3344 xtensa
->core_config
->windowed
= opt_val
;
3345 } else if (strcasecmp(opt_name
, "cpenable") == 0) {
3346 if (!xtensa_cmd_xtopt_legal_val("cpenable", opt_val
, 0, 1))
3347 return ERROR_COMMAND_ARGUMENT_INVALID
;
3348 xtensa
->core_config
->coproc
= opt_val
;
3349 } else if (strcasecmp(opt_name
, "exceptions") == 0) {
3350 if (!xtensa_cmd_xtopt_legal_val("exceptions", opt_val
, 0, 1))
3351 return ERROR_COMMAND_ARGUMENT_INVALID
;
3352 xtensa
->core_config
->exceptions
= opt_val
;
3353 } else if (strcasecmp(opt_name
, "intnum") == 0) {
3354 if (!xtensa_cmd_xtopt_legal_val("intnum", opt_val
, 0, 32))
3355 return ERROR_COMMAND_ARGUMENT_INVALID
;
3356 xtensa
->core_config
->irq
.enabled
= (opt_val
> 0);
3357 xtensa
->core_config
->irq
.irq_num
= opt_val
;
3358 } else if (strcasecmp(opt_name
, "hipriints") == 0) {
3359 if (!xtensa_cmd_xtopt_legal_val("hipriints", opt_val
, 0, 1))
3360 return ERROR_COMMAND_ARGUMENT_INVALID
;
3361 xtensa
->core_config
->high_irq
.enabled
= opt_val
;
3362 } else if (strcasecmp(opt_name
, "excmlevel") == 0) {
3363 if (!xtensa_cmd_xtopt_legal_val("excmlevel", opt_val
, 1, 6))
3364 return ERROR_COMMAND_ARGUMENT_INVALID
;
3365 if (!xtensa
->core_config
->high_irq
.enabled
) {
3366 LOG_ERROR("xtopt excmlevel requires hipriints\n");
3367 return ERROR_COMMAND_ARGUMENT_INVALID
;
3369 xtensa
->core_config
->high_irq
.excm_level
= opt_val
;
3370 } else if (strcasecmp(opt_name
, "intlevels") == 0) {
3371 if (xtensa
->core_config
->core_type
== XT_LX
) {
3372 if (!xtensa_cmd_xtopt_legal_val("intlevels", opt_val
, 2, 6))
3373 return ERROR_COMMAND_ARGUMENT_INVALID
;
3375 if (!xtensa_cmd_xtopt_legal_val("intlevels", opt_val
, 1, 255))
3376 return ERROR_COMMAND_ARGUMENT_INVALID
;
3378 if (!xtensa
->core_config
->high_irq
.enabled
) {
3379 LOG_ERROR("xtopt intlevels requires hipriints\n");
3380 return ERROR_COMMAND_ARGUMENT_INVALID
;
3382 xtensa
->core_config
->high_irq
.level_num
= opt_val
;
3383 } else if (strcasecmp(opt_name
, "debuglevel") == 0) {
3384 if (xtensa
->core_config
->core_type
== XT_LX
) {
3385 if (!xtensa_cmd_xtopt_legal_val("debuglevel", opt_val
, 2, 6))
3386 return ERROR_COMMAND_ARGUMENT_INVALID
;
3388 if (!xtensa_cmd_xtopt_legal_val("debuglevel", opt_val
, 0, 0))
3389 return ERROR_COMMAND_ARGUMENT_INVALID
;
3391 xtensa
->core_config
->debug
.enabled
= 1;
3392 xtensa
->core_config
->debug
.irq_level
= opt_val
;
3393 } else if (strcasecmp(opt_name
, "ibreaknum") == 0) {
3394 if (!xtensa_cmd_xtopt_legal_val("ibreaknum", opt_val
, 0, 2))
3395 return ERROR_COMMAND_ARGUMENT_INVALID
;
3396 xtensa
->core_config
->debug
.ibreaks_num
= opt_val
;
3397 } else if (strcasecmp(opt_name
, "dbreaknum") == 0) {
3398 if (!xtensa_cmd_xtopt_legal_val("dbreaknum", opt_val
, 0, 2))
3399 return ERROR_COMMAND_ARGUMENT_INVALID
;
3400 xtensa
->core_config
->debug
.dbreaks_num
= opt_val
;
3401 } else if (strcasecmp(opt_name
, "tracemem") == 0) {
3402 if (!xtensa_cmd_xtopt_legal_val("tracemem", opt_val
, 0, 256 * 1024))
3403 return ERROR_COMMAND_ARGUMENT_INVALID
;
3404 xtensa
->core_config
->trace
.mem_sz
= opt_val
;
3405 xtensa
->core_config
->trace
.enabled
= (opt_val
> 0);
3406 } else if (strcasecmp(opt_name
, "tracememrev") == 0) {
3407 if (!xtensa_cmd_xtopt_legal_val("tracememrev", opt_val
, 0, 1))
3408 return ERROR_COMMAND_ARGUMENT_INVALID
;
3409 xtensa
->core_config
->trace
.reversed_mem_access
= opt_val
;
3410 } else if (strcasecmp(opt_name
, "perfcount") == 0) {
3411 if (!xtensa_cmd_xtopt_legal_val("perfcount", opt_val
, 0, 8))
3412 return ERROR_COMMAND_ARGUMENT_INVALID
;
3413 xtensa
->core_config
->debug
.perfcount_num
= opt_val
;
3415 LOG_WARNING("Unknown xtensa command ignored: \"xtopt %s %s\"", CMD_ARGV
[0], CMD_ARGV
[1]);
3422 COMMAND_HANDLER(xtensa_cmd_xtopt
)
3424 return CALL_COMMAND_HANDLER(xtensa_cmd_xtopt_do
,
3425 target_to_xtensa(get_current_target(CMD_CTX
)));
3428 /* xtmem <type> [parameters] */
3429 COMMAND_HELPER(xtensa_cmd_xtmem_do
, struct xtensa
*xtensa
)
3431 struct xtensa_cache_config
*cachep
= NULL
;
3432 struct xtensa_local_mem_config
*memp
= NULL
;
3434 bool is_dcache
= false;
3436 if (CMD_ARGC
== 0) {
3437 LOG_ERROR("xtmem <type> [parameters]\n");
3438 return ERROR_COMMAND_SYNTAX_ERROR
;
3441 const char *mem_name
= CMD_ARGV
[0];
3442 if (strcasecmp(mem_name
, "icache") == 0) {
3443 cachep
= &xtensa
->core_config
->icache
;
3444 } else if (strcasecmp(mem_name
, "dcache") == 0) {
3445 cachep
= &xtensa
->core_config
->dcache
;
3447 } else if (strcasecmp(mem_name
, "l2cache") == 0) {
3448 /* TODO: support L2 cache */
3449 } else if (strcasecmp(mem_name
, "l2addr") == 0) {
3450 /* TODO: support L2 cache */
3451 } else if (strcasecmp(mem_name
, "iram") == 0) {
3452 memp
= &xtensa
->core_config
->iram
;
3453 mem_access
= XT_MEM_ACCESS_READ
| XT_MEM_ACCESS_WRITE
;
3454 } else if (strcasecmp(mem_name
, "dram") == 0) {
3455 memp
= &xtensa
->core_config
->dram
;
3456 mem_access
= XT_MEM_ACCESS_READ
| XT_MEM_ACCESS_WRITE
;
3457 } else if (strcasecmp(mem_name
, "sram") == 0) {
3458 memp
= &xtensa
->core_config
->sram
;
3459 mem_access
= XT_MEM_ACCESS_READ
| XT_MEM_ACCESS_WRITE
;
3460 } else if (strcasecmp(mem_name
, "irom") == 0) {
3461 memp
= &xtensa
->core_config
->irom
;
3462 mem_access
= XT_MEM_ACCESS_READ
;
3463 } else if (strcasecmp(mem_name
, "drom") == 0) {
3464 memp
= &xtensa
->core_config
->drom
;
3465 mem_access
= XT_MEM_ACCESS_READ
;
3466 } else if (strcasecmp(mem_name
, "srom") == 0) {
3467 memp
= &xtensa
->core_config
->srom
;
3468 mem_access
= XT_MEM_ACCESS_READ
;
3470 LOG_ERROR("xtmem types: <icache|dcache|l2cache|l2addr|iram|irom|dram|drom|sram|srom>\n");
3471 return ERROR_COMMAND_ARGUMENT_INVALID
;
3475 if ((CMD_ARGC
!= 4) && (CMD_ARGC
!= 5)) {
3476 LOG_ERROR("xtmem <cachetype> <linebytes> <cachebytes> <ways> [writeback]\n");
3477 return ERROR_COMMAND_SYNTAX_ERROR
;
3479 cachep
->line_size
= strtoul(CMD_ARGV
[1], NULL
, 0);
3480 cachep
->size
= strtoul(CMD_ARGV
[2], NULL
, 0);
3481 cachep
->way_count
= strtoul(CMD_ARGV
[3], NULL
, 0);
3482 cachep
->writeback
= ((CMD_ARGC
== 5) && is_dcache
) ?
3483 strtoul(CMD_ARGV
[4], NULL
, 0) : 0;
3485 if (CMD_ARGC
!= 3) {
3486 LOG_ERROR("xtmem <memtype> <baseaddr> <bytes>\n");
3487 return ERROR_COMMAND_SYNTAX_ERROR
;
3489 struct xtensa_local_mem_region_config
*memcfgp
= &memp
->regions
[memp
->count
];
3490 memcfgp
->base
= strtoul(CMD_ARGV
[1], NULL
, 0);
3491 memcfgp
->size
= strtoul(CMD_ARGV
[2], NULL
, 0);
3492 memcfgp
->access
= mem_access
;
3499 COMMAND_HANDLER(xtensa_cmd_xtmem
)
3501 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmem_do
,
3502 target_to_xtensa(get_current_target(CMD_CTX
)));
3505 /* xtmpu <num FG seg> <min seg size> <lockable> <executeonly> */
3506 COMMAND_HELPER(xtensa_cmd_xtmpu_do
, struct xtensa
*xtensa
)
3508 if (CMD_ARGC
!= 4) {
3509 LOG_ERROR("xtmpu <num FG seg> <min seg size> <lockable> <executeonly>\n");
3510 return ERROR_COMMAND_SYNTAX_ERROR
;
3513 unsigned int nfgseg
= strtoul(CMD_ARGV
[0], NULL
, 0);
3514 unsigned int minsegsize
= strtoul(CMD_ARGV
[1], NULL
, 0);
3515 unsigned int lockable
= strtoul(CMD_ARGV
[2], NULL
, 0);
3516 unsigned int execonly
= strtoul(CMD_ARGV
[3], NULL
, 0);
3518 if ((nfgseg
> 32)) {
3519 LOG_ERROR("<nfgseg> must be within [0..32]\n");
3520 return ERROR_COMMAND_ARGUMENT_INVALID
;
3521 } else if (minsegsize
& (minsegsize
- 1)) {
3522 LOG_ERROR("<minsegsize> must be a power of 2 >= 32\n");
3523 return ERROR_COMMAND_ARGUMENT_INVALID
;
3524 } else if (lockable
> 1) {
3525 LOG_ERROR("<lockable> must be 0 or 1\n");
3526 return ERROR_COMMAND_ARGUMENT_INVALID
;
3527 } else if (execonly
> 1) {
3528 LOG_ERROR("<execonly> must be 0 or 1\n");
3529 return ERROR_COMMAND_ARGUMENT_INVALID
;
3532 xtensa
->core_config
->mpu
.enabled
= true;
3533 xtensa
->core_config
->mpu
.nfgseg
= nfgseg
;
3534 xtensa
->core_config
->mpu
.minsegsize
= minsegsize
;
3535 xtensa
->core_config
->mpu
.lockable
= lockable
;
3536 xtensa
->core_config
->mpu
.execonly
= execonly
;
3540 COMMAND_HANDLER(xtensa_cmd_xtmpu
)
3542 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmpu_do
,
3543 target_to_xtensa(get_current_target(CMD_CTX
)));
3546 /* xtmmu <NIREFILLENTRIES> <NDREFILLENTRIES> <IVARWAY56> <DVARWAY56> */
3547 COMMAND_HELPER(xtensa_cmd_xtmmu_do
, struct xtensa
*xtensa
)
3549 if (CMD_ARGC
!= 2) {
3550 LOG_ERROR("xtmmu <NIREFILLENTRIES> <NDREFILLENTRIES>\n");
3551 return ERROR_COMMAND_SYNTAX_ERROR
;
3554 unsigned int nirefillentries
= strtoul(CMD_ARGV
[0], NULL
, 0);
3555 unsigned int ndrefillentries
= strtoul(CMD_ARGV
[1], NULL
, 0);
3556 if ((nirefillentries
!= 16) && (nirefillentries
!= 32)) {
3557 LOG_ERROR("<nirefillentries> must be 16 or 32\n");
3558 return ERROR_COMMAND_ARGUMENT_INVALID
;
3559 } else if ((ndrefillentries
!= 16) && (ndrefillentries
!= 32)) {
3560 LOG_ERROR("<ndrefillentries> must be 16 or 32\n");
3561 return ERROR_COMMAND_ARGUMENT_INVALID
;
3564 xtensa
->core_config
->mmu
.enabled
= true;
3565 xtensa
->core_config
->mmu
.itlb_entries_count
= nirefillentries
;
3566 xtensa
->core_config
->mmu
.dtlb_entries_count
= ndrefillentries
;
3570 COMMAND_HANDLER(xtensa_cmd_xtmmu
)
3572 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmmu_do
,
3573 target_to_xtensa(get_current_target(CMD_CTX
)));
3577 * xtreg <regname> <regnum> */
3578 COMMAND_HELPER(xtensa_cmd_xtreg_do
, struct xtensa
*xtensa
)
3580 if (CMD_ARGC
== 1) {
3581 int32_t numregs
= strtoul(CMD_ARGV
[0], NULL
, 0);
3582 if ((numregs
<= 0) || (numregs
> UINT16_MAX
)) {
3583 LOG_ERROR("xtreg <numregs>: Invalid 'numregs' (%d)", numregs
);
3584 return ERROR_COMMAND_SYNTAX_ERROR
;
3586 if ((xtensa
->genpkt_regs_num
> 0) && (numregs
< (int32_t)xtensa
->genpkt_regs_num
)) {
3587 LOG_ERROR("xtregs (%d) must be larger than numgenregs (%d) (if xtregfmt specified)",
3588 numregs
, xtensa
->genpkt_regs_num
);
3589 return ERROR_COMMAND_SYNTAX_ERROR
;
3591 xtensa
->total_regs_num
= numregs
;
3592 xtensa
->core_regs_num
= 0;
3593 xtensa
->num_optregs
= 0;
3594 /* A little more memory than required, but saves a second initialization pass */
3595 xtensa
->optregs
= calloc(xtensa
->total_regs_num
, sizeof(struct xtensa_reg_desc
));
3596 if (!xtensa
->optregs
) {
3597 LOG_ERROR("Failed to allocate xtensa->optregs!");
3601 } else if (CMD_ARGC
!= 2) {
3602 return ERROR_COMMAND_SYNTAX_ERROR
;
3605 /* "xtregfmt contiguous" must be specified prior to the first "xtreg" definition
3606 * if general register (g-packet) requests or contiguous register maps are supported */
3607 if (xtensa
->regmap_contiguous
&& !xtensa
->contiguous_regs_desc
) {
3608 xtensa
->contiguous_regs_desc
= calloc(xtensa
->total_regs_num
, sizeof(struct xtensa_reg_desc
*));
3609 if (!xtensa
->contiguous_regs_desc
) {
3610 LOG_ERROR("Failed to allocate xtensa->contiguous_regs_desc!");
3615 const char *regname
= CMD_ARGV
[0];
3616 unsigned int regnum
= strtoul(CMD_ARGV
[1], NULL
, 0);
3617 if (regnum
> UINT16_MAX
) {
3618 LOG_ERROR("<regnum> must be a 16-bit number");
3619 return ERROR_COMMAND_ARGUMENT_INVALID
;
3622 if ((xtensa
->num_optregs
+ xtensa
->core_regs_num
) >= xtensa
->total_regs_num
) {
3623 if (xtensa
->total_regs_num
)
3624 LOG_ERROR("'xtreg %s 0x%04x': Too many registers (%d expected, %d core %d extended)",
3626 xtensa
->total_regs_num
, xtensa
->core_regs_num
, xtensa
->num_optregs
);
3628 LOG_ERROR("'xtreg %s 0x%04x': Number of registers unspecified",
3633 /* Determine whether register belongs in xtensa_regs[] or xtensa->xtensa_spec_regs[] */
3634 struct xtensa_reg_desc
*rptr
= &xtensa
->optregs
[xtensa
->num_optregs
];
3635 bool is_extended_reg
= true;
3637 for (ridx
= 0; ridx
< XT_NUM_REGS
; ridx
++) {
3638 if (strcmp(CMD_ARGV
[0], xtensa_regs
[ridx
].name
) == 0) {
3639 /* Flag core register as defined */
3640 rptr
= &xtensa_regs
[ridx
];
3641 xtensa
->core_regs_num
++;
3642 is_extended_reg
= false;
3648 if (is_extended_reg
) {
3649 /* Register ID, debugger-visible register ID */
3650 rptr
->name
= strdup(CMD_ARGV
[0]);
3651 rptr
->dbreg_num
= regnum
;
3652 rptr
->reg_num
= (regnum
& XT_REG_INDEX_MASK
);
3653 xtensa
->num_optregs
++;
3656 if ((regnum
& XT_REG_GENERAL_MASK
) == XT_REG_GENERAL_VAL
) {
3657 rptr
->type
= XT_REG_GENERAL
;
3658 } else if ((regnum
& XT_REG_USER_MASK
) == XT_REG_USER_VAL
) {
3659 rptr
->type
= XT_REG_USER
;
3660 } else if ((regnum
& XT_REG_FR_MASK
) == XT_REG_FR_VAL
) {
3661 rptr
->type
= XT_REG_FR
;
3662 } else if ((regnum
& XT_REG_SPECIAL_MASK
) == XT_REG_SPECIAL_VAL
) {
3663 rptr
->type
= XT_REG_SPECIAL
;
3664 } else if ((regnum
& XT_REG_RELGEN_MASK
) == XT_REG_RELGEN_VAL
) {
3665 /* WARNING: For these registers, regnum points to the
3666 * index of the corresponding ARx registers, NOT to
3667 * the processor register number! */
3668 rptr
->type
= XT_REG_RELGEN
;
3669 rptr
->reg_num
+= XT_REG_IDX_ARFIRST
;
3670 rptr
->dbreg_num
+= XT_REG_IDX_ARFIRST
;
3671 } else if ((regnum
& XT_REG_TIE_MASK
) != 0) {
3672 rptr
->type
= XT_REG_TIE
;
3674 rptr
->type
= XT_REG_OTHER
;
3677 /* Register flags */
3678 if ((strcmp(rptr
->name
, "mmid") == 0) || (strcmp(rptr
->name
, "eraccess") == 0) ||
3679 (strcmp(rptr
->name
, "ddr") == 0) || (strcmp(rptr
->name
, "intset") == 0) ||
3680 (strcmp(rptr
->name
, "intclear") == 0))
3681 rptr
->flags
= XT_REGF_NOREAD
;
3685 if (rptr
->reg_num
== (XT_EPS_REG_NUM_BASE
+ xtensa
->core_config
->debug
.irq_level
) &&
3686 xtensa
->core_config
->core_type
== XT_LX
&& rptr
->type
== XT_REG_SPECIAL
) {
3687 xtensa
->eps_dbglevel_idx
= XT_NUM_REGS
+ xtensa
->num_optregs
- 1;
3688 LOG_DEBUG("Setting PS (%s) index to %d", rptr
->name
, xtensa
->eps_dbglevel_idx
);
3690 if (xtensa
->core_config
->core_type
== XT_NX
) {
3691 enum xtensa_nx_reg_idx idx
= XT_NX_REG_IDX_NUM
;
3692 if (strcmp(rptr
->name
, "ibreakc0") == 0)
3693 idx
= XT_NX_REG_IDX_IBREAKC0
;
3694 else if (strcmp(rptr
->name
, "wb") == 0)
3695 idx
= XT_NX_REG_IDX_WB
;
3696 else if (strcmp(rptr
->name
, "ms") == 0)
3697 idx
= XT_NX_REG_IDX_MS
;
3698 else if (strcmp(rptr
->name
, "ievec") == 0)
3699 idx
= XT_NX_REG_IDX_IEVEC
;
3700 else if (strcmp(rptr
->name
, "ieextern") == 0)
3701 idx
= XT_NX_REG_IDX_IEEXTERN
;
3702 else if (strcmp(rptr
->name
, "mesr") == 0)
3703 idx
= XT_NX_REG_IDX_MESR
;
3704 else if (strcmp(rptr
->name
, "mesrclr") == 0)
3705 idx
= XT_NX_REG_IDX_MESRCLR
;
3706 if (idx
< XT_NX_REG_IDX_NUM
) {
3707 if (xtensa
->nx_reg_idx
[idx
] != 0) {
3708 LOG_ERROR("nx_reg_idx[%d] previously set to %d",
3709 idx
, xtensa
->nx_reg_idx
[idx
]);
3712 xtensa
->nx_reg_idx
[idx
] = XT_NUM_REGS
+ xtensa
->num_optregs
- 1;
3713 LOG_DEBUG("NX reg %s: index %d (%d)",
3714 rptr
->name
, xtensa
->nx_reg_idx
[idx
], idx
);
3717 } else if (strcmp(rptr
->name
, "cpenable") == 0) {
3718 xtensa
->core_config
->coproc
= true;
3721 /* Build out list of contiguous registers in specified order */
3722 unsigned int running_reg_count
= xtensa
->num_optregs
+ xtensa
->core_regs_num
;
3723 if (xtensa
->contiguous_regs_desc
) {
3724 assert((running_reg_count
<= xtensa
->total_regs_num
) && "contiguous register address internal error!");
3725 xtensa
->contiguous_regs_desc
[running_reg_count
- 1] = rptr
;
3727 if (xtensa_extra_debug_log
)
3728 LOG_DEBUG("Added %s register %-16s: 0x%04x/0x%02x t%d (%d of %d)",
3729 is_extended_reg
? "config-specific" : "core",
3730 rptr
->name
, rptr
->dbreg_num
, rptr
->reg_num
, rptr
->type
,
3731 is_extended_reg
? xtensa
->num_optregs
: ridx
,
3732 is_extended_reg
? xtensa
->total_regs_num
: XT_NUM_REGS
);
3736 COMMAND_HANDLER(xtensa_cmd_xtreg
)
3738 return CALL_COMMAND_HANDLER(xtensa_cmd_xtreg_do
,
3739 target_to_xtensa(get_current_target(CMD_CTX
)));
3742 /* xtregfmt <contiguous|sparse> [numgregs] */
3743 COMMAND_HELPER(xtensa_cmd_xtregfmt_do
, struct xtensa
*xtensa
)
3745 if ((CMD_ARGC
== 1) || (CMD_ARGC
== 2)) {
3746 if (!strcasecmp(CMD_ARGV
[0], "sparse")) {
3748 } else if (!strcasecmp(CMD_ARGV
[0], "contiguous")) {
3749 xtensa
->regmap_contiguous
= true;
3750 if (CMD_ARGC
== 2) {
3751 unsigned int numgregs
= strtoul(CMD_ARGV
[1], NULL
, 0);
3752 if ((numgregs
<= 0) ||
3753 ((numgregs
> xtensa
->total_regs_num
) &&
3754 (xtensa
->total_regs_num
> 0))) {
3755 LOG_ERROR("xtregfmt: if specified, numgregs (%d) must be <= numregs (%d)",
3756 numgregs
, xtensa
->total_regs_num
);
3757 return ERROR_COMMAND_SYNTAX_ERROR
;
3759 xtensa
->genpkt_regs_num
= numgregs
;
3764 return ERROR_COMMAND_SYNTAX_ERROR
;
3767 COMMAND_HANDLER(xtensa_cmd_xtregfmt
)
3769 return CALL_COMMAND_HANDLER(xtensa_cmd_xtregfmt_do
,
3770 target_to_xtensa(get_current_target(CMD_CTX
)));
3773 COMMAND_HELPER(xtensa_cmd_permissive_mode_do
, struct xtensa
*xtensa
)
3775 return CALL_COMMAND_HANDLER(handle_command_parse_bool
,
3776 &xtensa
->permissive_mode
, "xtensa permissive mode");
3779 COMMAND_HANDLER(xtensa_cmd_permissive_mode
)
3781 return CALL_COMMAND_HANDLER(xtensa_cmd_permissive_mode_do
,
3782 target_to_xtensa(get_current_target(CMD_CTX
)));
3785 /* perfmon_enable <counter_id> <select> [mask] [kernelcnt] [tracelevel] */
3786 COMMAND_HELPER(xtensa_cmd_perfmon_enable_do
, struct xtensa
*xtensa
)
3788 struct xtensa_perfmon_config config
= {
3791 .tracelevel
= -1 /* use DEBUGLEVEL by default */
3794 if (CMD_ARGC
< 2 || CMD_ARGC
> 6)
3795 return ERROR_COMMAND_SYNTAX_ERROR
;
3797 unsigned int counter_id
= strtoul(CMD_ARGV
[0], NULL
, 0);
3798 if (counter_id
>= XTENSA_MAX_PERF_COUNTERS
) {
3799 command_print(CMD
, "counter_id should be < %d", XTENSA_MAX_PERF_COUNTERS
);
3800 return ERROR_COMMAND_ARGUMENT_INVALID
;
3803 config
.select
= strtoul(CMD_ARGV
[1], NULL
, 0);
3804 if (config
.select
> XTENSA_MAX_PERF_SELECT
) {
3805 command_print(CMD
, "select should be < %d", XTENSA_MAX_PERF_SELECT
);
3806 return ERROR_COMMAND_ARGUMENT_INVALID
;
3809 if (CMD_ARGC
>= 3) {
3810 config
.mask
= strtoul(CMD_ARGV
[2], NULL
, 0);
3811 if (config
.mask
> XTENSA_MAX_PERF_MASK
) {
3812 command_print(CMD
, "mask should be < %d", XTENSA_MAX_PERF_MASK
);
3813 return ERROR_COMMAND_ARGUMENT_INVALID
;
3817 if (CMD_ARGC
>= 4) {
3818 config
.kernelcnt
= strtoul(CMD_ARGV
[3], NULL
, 0);
3819 if (config
.kernelcnt
> 1) {
3820 command_print(CMD
, "kernelcnt should be 0 or 1");
3821 return ERROR_COMMAND_ARGUMENT_INVALID
;
3825 if (CMD_ARGC
>= 5) {
3826 config
.tracelevel
= strtoul(CMD_ARGV
[4], NULL
, 0);
3827 if (config
.tracelevel
> 7) {
3828 command_print(CMD
, "tracelevel should be <=7");
3829 return ERROR_COMMAND_ARGUMENT_INVALID
;
3833 if (config
.tracelevel
== -1)
3834 config
.tracelevel
= xtensa
->core_config
->debug
.irq_level
;
3836 return xtensa_dm_perfmon_enable(&xtensa
->dbg_mod
, counter_id
, &config
);
3839 COMMAND_HANDLER(xtensa_cmd_perfmon_enable
)
3841 return CALL_COMMAND_HANDLER(xtensa_cmd_perfmon_enable_do
,
3842 target_to_xtensa(get_current_target(CMD_CTX
)));
3845 /* perfmon_dump [counter_id] */
3846 COMMAND_HELPER(xtensa_cmd_perfmon_dump_do
, struct xtensa
*xtensa
)
3849 return ERROR_COMMAND_SYNTAX_ERROR
;
3851 int counter_id
= -1;
3852 if (CMD_ARGC
== 1) {
3853 counter_id
= strtol(CMD_ARGV
[0], NULL
, 0);
3854 if (counter_id
> XTENSA_MAX_PERF_COUNTERS
) {
3855 command_print(CMD
, "counter_id should be < %d", XTENSA_MAX_PERF_COUNTERS
);
3856 return ERROR_COMMAND_ARGUMENT_INVALID
;
3860 unsigned int counter_start
= (counter_id
< 0) ? 0 : counter_id
;
3861 unsigned int counter_end
= (counter_id
< 0) ? XTENSA_MAX_PERF_COUNTERS
: counter_id
+ 1;
3862 for (unsigned int counter
= counter_start
; counter
< counter_end
; ++counter
) {
3863 char result_buf
[128] = { 0 };
3864 size_t result_pos
= snprintf(result_buf
, sizeof(result_buf
), "Counter %d: ", counter
);
3865 struct xtensa_perfmon_result result
;
3866 int res
= xtensa_dm_perfmon_dump(&xtensa
->dbg_mod
, counter
, &result
);
3867 if (res
!= ERROR_OK
)
3869 snprintf(result_buf
+ result_pos
, sizeof(result_buf
) - result_pos
,
3872 result
.overflow
? " (overflow)" : "");
3873 LOG_INFO("%s", result_buf
);
3879 COMMAND_HANDLER(xtensa_cmd_perfmon_dump
)
3881 return CALL_COMMAND_HANDLER(xtensa_cmd_perfmon_dump_do
,
3882 target_to_xtensa(get_current_target(CMD_CTX
)));
3885 COMMAND_HELPER(xtensa_cmd_mask_interrupts_do
, struct xtensa
*xtensa
)
3891 state
= xtensa
->stepping_isr_mode
;
3892 if (state
== XT_STEPPING_ISR_ON
)
3894 else if (state
== XT_STEPPING_ISR_OFF
)
3898 command_print(CMD
, "Current ISR step mode: %s", st
);
3902 if (xtensa
->core_config
->core_type
== XT_NX
) {
3903 command_print(CMD
, "ERROR: ISR step mode only supported on Xtensa LX");
3907 /* Masking is ON -> interrupts during stepping are OFF, and vice versa */
3908 if (!strcasecmp(CMD_ARGV
[0], "off"))
3909 state
= XT_STEPPING_ISR_ON
;
3910 else if (!strcasecmp(CMD_ARGV
[0], "on"))
3911 state
= XT_STEPPING_ISR_OFF
;
3914 command_print(CMD
, "Argument unknown. Please pick one of ON, OFF");
3917 xtensa
->stepping_isr_mode
= state
;
3921 COMMAND_HANDLER(xtensa_cmd_mask_interrupts
)
3923 return CALL_COMMAND_HANDLER(xtensa_cmd_mask_interrupts_do
,
3924 target_to_xtensa(get_current_target(CMD_CTX
)));
3927 COMMAND_HELPER(xtensa_cmd_smpbreak_do
, struct target
*target
)
3932 if (CMD_ARGC
>= 1) {
3933 for (unsigned int i
= 0; i
< CMD_ARGC
; i
++) {
3934 if (!strcasecmp(CMD_ARGV
[0], "none")) {
3936 } else if (!strcasecmp(CMD_ARGV
[i
], "BreakIn")) {
3937 val
|= OCDDCR_BREAKINEN
;
3938 } else if (!strcasecmp(CMD_ARGV
[i
], "BreakOut")) {
3939 val
|= OCDDCR_BREAKOUTEN
;
3940 } else if (!strcasecmp(CMD_ARGV
[i
], "RunStallIn")) {
3941 val
|= OCDDCR_RUNSTALLINEN
;
3942 } else if (!strcasecmp(CMD_ARGV
[i
], "DebugModeOut")) {
3943 val
|= OCDDCR_DEBUGMODEOUTEN
;
3944 } else if (!strcasecmp(CMD_ARGV
[i
], "BreakInOut")) {
3945 val
|= OCDDCR_BREAKINEN
| OCDDCR_BREAKOUTEN
;
3946 } else if (!strcasecmp(CMD_ARGV
[i
], "RunStall")) {
3947 val
|= OCDDCR_RUNSTALLINEN
| OCDDCR_DEBUGMODEOUTEN
;
3949 command_print(CMD
, "Unknown arg %s", CMD_ARGV
[i
]);
3952 "use either BreakInOut, None or RunStall as arguments, or any combination of BreakIn, BreakOut, RunStallIn and DebugModeOut.");
3956 res
= xtensa_smpbreak_set(target
, val
);
3957 if (res
!= ERROR_OK
)
3958 command_print(CMD
, "Failed to set smpbreak config %d", res
);
3960 struct xtensa
*xtensa
= target_to_xtensa(target
);
3961 res
= xtensa_smpbreak_read(xtensa
, &val
);
3962 if (res
== ERROR_OK
)
3963 command_print(CMD
, "Current bits set:%s%s%s%s",
3964 (val
& OCDDCR_BREAKINEN
) ? " BreakIn" : "",
3965 (val
& OCDDCR_BREAKOUTEN
) ? " BreakOut" : "",
3966 (val
& OCDDCR_RUNSTALLINEN
) ? " RunStallIn" : "",
3967 (val
& OCDDCR_DEBUGMODEOUTEN
) ? " DebugModeOut" : ""
3970 command_print(CMD
, "Failed to get smpbreak config %d", res
);
3975 COMMAND_HANDLER(xtensa_cmd_smpbreak
)
3977 return CALL_COMMAND_HANDLER(xtensa_cmd_smpbreak_do
,
3978 get_current_target(CMD_CTX
));
3981 COMMAND_HELPER(xtensa_cmd_tracestart_do
, struct xtensa
*xtensa
)
3983 struct xtensa_trace_status trace_status
;
3984 struct xtensa_trace_start_config cfg
= {
3986 .stopmask
= XTENSA_STOPMASK_DISABLED
,
3988 .after_is_words
= false
3991 /* Parse arguments */
3992 for (unsigned int i
= 0; i
< CMD_ARGC
; i
++) {
3993 if ((!strcasecmp(CMD_ARGV
[i
], "pc")) && CMD_ARGC
> i
) {
3996 cfg
.stoppc
= strtol(CMD_ARGV
[i
], &e
, 0);
3999 cfg
.stopmask
= strtol(e
, NULL
, 0);
4000 } else if ((!strcasecmp(CMD_ARGV
[i
], "after")) && CMD_ARGC
> i
) {
4002 cfg
.after
= strtol(CMD_ARGV
[i
], NULL
, 0);
4003 } else if (!strcasecmp(CMD_ARGV
[i
], "ins")) {
4004 cfg
.after_is_words
= 0;
4005 } else if (!strcasecmp(CMD_ARGV
[i
], "words")) {
4006 cfg
.after_is_words
= 1;
4008 command_print(CMD
, "Did not understand %s", CMD_ARGV
[i
]);
4013 int res
= xtensa_dm_trace_status_read(&xtensa
->dbg_mod
, &trace_status
);
4014 if (res
!= ERROR_OK
)
4016 if (trace_status
.stat
& TRAXSTAT_TRACT
) {
4017 LOG_WARNING("Silently stop active tracing!");
4018 res
= xtensa_dm_trace_stop(&xtensa
->dbg_mod
, false);
4019 if (res
!= ERROR_OK
)
4023 res
= xtensa_dm_trace_start(&xtensa
->dbg_mod
, &cfg
);
4024 if (res
!= ERROR_OK
)
4027 xtensa
->trace_active
= true;
4028 command_print(CMD
, "Trace started.");
4032 COMMAND_HANDLER(xtensa_cmd_tracestart
)
4034 return CALL_COMMAND_HANDLER(xtensa_cmd_tracestart_do
,
4035 target_to_xtensa(get_current_target(CMD_CTX
)));
4038 COMMAND_HELPER(xtensa_cmd_tracestop_do
, struct xtensa
*xtensa
)
4040 struct xtensa_trace_status trace_status
;
4042 int res
= xtensa_dm_trace_status_read(&xtensa
->dbg_mod
, &trace_status
);
4043 if (res
!= ERROR_OK
)
4046 if (!(trace_status
.stat
& TRAXSTAT_TRACT
)) {
4047 command_print(CMD
, "No trace is currently active.");
4051 res
= xtensa_dm_trace_stop(&xtensa
->dbg_mod
, true);
4052 if (res
!= ERROR_OK
)
4055 xtensa
->trace_active
= false;
4056 command_print(CMD
, "Trace stop triggered.");
4060 COMMAND_HANDLER(xtensa_cmd_tracestop
)
4062 return CALL_COMMAND_HANDLER(xtensa_cmd_tracestop_do
,
4063 target_to_xtensa(get_current_target(CMD_CTX
)));
4066 COMMAND_HELPER(xtensa_cmd_tracedump_do
, struct xtensa
*xtensa
, const char *fname
)
4068 struct xtensa_trace_config trace_config
;
4069 struct xtensa_trace_status trace_status
;
4070 uint32_t memsz
, wmem
;
4072 int res
= xtensa_dm_trace_status_read(&xtensa
->dbg_mod
, &trace_status
);
4073 if (res
!= ERROR_OK
)
4076 if (trace_status
.stat
& TRAXSTAT_TRACT
) {
4077 command_print(CMD
, "Tracing is still active. Please stop it first.");
4081 res
= xtensa_dm_trace_config_read(&xtensa
->dbg_mod
, &trace_config
);
4082 if (res
!= ERROR_OK
)
4085 if (!(trace_config
.ctrl
& TRAXCTRL_TREN
)) {
4086 command_print(CMD
, "No active trace found; nothing to dump.");
4090 memsz
= trace_config
.memaddr_end
- trace_config
.memaddr_start
+ 1;
4091 LOG_INFO("Total trace memory: %d words", memsz
);
4092 if ((trace_config
.addr
&
4093 ((TRAXADDR_TWRAP_MASK
<< TRAXADDR_TWRAP_SHIFT
) | TRAXADDR_TWSAT
)) == 0) {
4094 /*Memory hasn't overwritten itself yet. */
4095 wmem
= trace_config
.addr
& TRAXADDR_TADDR_MASK
;
4096 LOG_INFO("...but trace is only %d words", wmem
);
4100 if (trace_config
.addr
& TRAXADDR_TWSAT
) {
4101 LOG_INFO("Real trace is many times longer than that (overflow)");
4103 uint32_t trc_sz
= (trace_config
.addr
>> TRAXADDR_TWRAP_SHIFT
) & TRAXADDR_TWRAP_MASK
;
4104 trc_sz
= (trc_sz
* memsz
) + (trace_config
.addr
& TRAXADDR_TADDR_MASK
);
4105 LOG_INFO("Real trace is %d words, but the start has been truncated.", trc_sz
);
4109 uint8_t *tracemem
= malloc(memsz
* 4);
4111 command_print(CMD
, "Failed to alloc memory for trace data!");
4114 res
= xtensa_dm_trace_data_read(&xtensa
->dbg_mod
, tracemem
, memsz
* 4);
4115 if (res
!= ERROR_OK
) {
4120 int f
= open(fname
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666);
4123 command_print(CMD
, "Unable to open file %s", fname
);
4126 if (write(f
, tracemem
, memsz
* 4) != (int)memsz
* 4)
4127 command_print(CMD
, "Unable to write to file %s", fname
);
4129 command_print(CMD
, "Written %d bytes of trace data to %s", memsz
* 4, fname
);
4132 bool is_all_zeroes
= true;
4133 for (unsigned int i
= 0; i
< memsz
* 4; i
++) {
4134 if (tracemem
[i
] != 0) {
4135 is_all_zeroes
= false;
4143 "WARNING: File written is all zeroes. Are you sure you enabled trace memory?");
4148 COMMAND_HANDLER(xtensa_cmd_tracedump
)
4150 if (CMD_ARGC
!= 1) {
4151 command_print(CMD
, "Command takes exactly 1 parameter.Need filename to dump to as output!");
4155 return CALL_COMMAND_HANDLER(xtensa_cmd_tracedump_do
,
4156 target_to_xtensa(get_current_target(CMD_CTX
)), CMD_ARGV
[0]);
4159 static const struct command_registration xtensa_any_command_handlers
[] = {
4162 .handler
= xtensa_cmd_xtdef
,
4163 .mode
= COMMAND_CONFIG
,
4164 .help
= "Configure Xtensa core type",
4169 .handler
= xtensa_cmd_xtopt
,
4170 .mode
= COMMAND_CONFIG
,
4171 .help
= "Configure Xtensa core option",
4172 .usage
= "<name> <value>",
4176 .handler
= xtensa_cmd_xtmem
,
4177 .mode
= COMMAND_CONFIG
,
4178 .help
= "Configure Xtensa memory/cache option",
4179 .usage
= "<type> [parameters]",
4183 .handler
= xtensa_cmd_xtmmu
,
4184 .mode
= COMMAND_CONFIG
,
4185 .help
= "Configure Xtensa MMU option",
4186 .usage
= "<NIREFILLENTRIES> <NDREFILLENTRIES> <IVARWAY56> <DVARWAY56>",
4190 .handler
= xtensa_cmd_xtmpu
,
4191 .mode
= COMMAND_CONFIG
,
4192 .help
= "Configure Xtensa MPU option",
4193 .usage
= "<num FG seg> <min seg size> <lockable> <executeonly>",
4197 .handler
= xtensa_cmd_xtreg
,
4198 .mode
= COMMAND_CONFIG
,
4199 .help
= "Configure Xtensa register",
4200 .usage
= "<regname> <regnum>",
4204 .handler
= xtensa_cmd_xtreg
,
4205 .mode
= COMMAND_CONFIG
,
4206 .help
= "Configure number of Xtensa registers",
4207 .usage
= "<numregs>",
4211 .handler
= xtensa_cmd_xtregfmt
,
4212 .mode
= COMMAND_CONFIG
,
4213 .help
= "Configure format of Xtensa register map",
4214 .usage
= "<contiguous|sparse> [numgregs]",
4217 .name
= "set_permissive",
4218 .handler
= xtensa_cmd_permissive_mode
,
4219 .mode
= COMMAND_ANY
,
4220 .help
= "When set to 1, enable Xtensa permissive mode (fewer client-side checks)",
4225 .handler
= xtensa_cmd_mask_interrupts
,
4226 .mode
= COMMAND_ANY
,
4227 .help
= "mask Xtensa interrupts at step",
4228 .usage
= "['on'|'off']",
4232 .handler
= xtensa_cmd_smpbreak
,
4233 .mode
= COMMAND_ANY
,
4234 .help
= "Set the way the CPU chains OCD breaks",
4235 .usage
= "[none|breakinout|runstall] | [BreakIn] [BreakOut] [RunStallIn] [DebugModeOut]",
4238 .name
= "perfmon_enable",
4239 .handler
= xtensa_cmd_perfmon_enable
,
4240 .mode
= COMMAND_EXEC
,
4241 .help
= "Enable and start performance counter",
4242 .usage
= "<counter_id> <select> [mask] [kernelcnt] [tracelevel]",
4245 .name
= "perfmon_dump",
4246 .handler
= xtensa_cmd_perfmon_dump
,
4247 .mode
= COMMAND_EXEC
,
4248 .help
= "Dump performance counter value. If no argument specified, dumps all counters.",
4249 .usage
= "[counter_id]",
4252 .name
= "tracestart",
4253 .handler
= xtensa_cmd_tracestart
,
4254 .mode
= COMMAND_EXEC
,
4256 "Tracing: Set up and start a trace. Optionally set stop trigger address and amount of data captured after.",
4257 .usage
= "[pc <pcval>/[maskbitcount]] [after <n> [ins|words]]",
4260 .name
= "tracestop",
4261 .handler
= xtensa_cmd_tracestop
,
4262 .mode
= COMMAND_EXEC
,
4263 .help
= "Tracing: Stop current trace as started by the tracestart command",
4267 .name
= "tracedump",
4268 .handler
= xtensa_cmd_tracedump
,
4269 .mode
= COMMAND_EXEC
,
4270 .help
= "Tracing: Dump trace memory to a files. One file per core.",
4271 .usage
= "<outfile>",
4275 .handler
= xtensa_cmd_exe
,
4276 .mode
= COMMAND_ANY
,
4277 .help
= "Xtensa stub execution",
4278 .usage
= "<ascii-encoded hexadecimal instruction bytes>",
4280 COMMAND_REGISTRATION_DONE
4283 const struct command_registration xtensa_command_handlers
[] = {
4286 .mode
= COMMAND_ANY
,
4287 .help
= "Xtensa command group",
4289 .chain
= xtensa_any_command_handlers
,
4291 COMMAND_REGISTRATION_DONE