1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 #include "target/target.h"
12 #include "target/algorithm.h"
13 #include "target/target_type.h"
15 #include "jtag/jtag.h"
16 #include "target/register.h"
17 #include "target/breakpoints.h"
18 #include "helper/time_support.h"
21 #include "rtos/rtos.h"
23 #define get_field(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1)))
24 #define set_field(reg, mask, val) (((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask)))
26 #define DIM(x) (sizeof(x)/sizeof(*x))
28 /* Constants for legacy SiFive hardware breakpoints. */
29 #define CSR_BPCONTROL_X (1<<0)
30 #define CSR_BPCONTROL_W (1<<1)
31 #define CSR_BPCONTROL_R (1<<2)
32 #define CSR_BPCONTROL_U (1<<3)
33 #define CSR_BPCONTROL_S (1<<4)
34 #define CSR_BPCONTROL_H (1<<5)
35 #define CSR_BPCONTROL_M (1<<6)
36 #define CSR_BPCONTROL_BPMATCH (0xf<<7)
37 #define CSR_BPCONTROL_BPACTION (0xff<<11)
39 #define DEBUG_ROM_START 0x800
40 #define DEBUG_ROM_RESUME (DEBUG_ROM_START + 4)
41 #define DEBUG_ROM_EXCEPTION (DEBUG_ROM_START + 8)
42 #define DEBUG_RAM_START 0x400
44 #define SETHALTNOT 0x10c
46 /*** JTAG registers. ***/
48 #define DTMCONTROL 0x10
49 #define DTMCONTROL_DBUS_RESET (1<<16)
50 #define DTMCONTROL_IDLE (7<<10)
51 #define DTMCONTROL_ADDRBITS (0xf<<4)
52 #define DTMCONTROL_VERSION (0xf)
55 #define DBUS_OP_START 0
56 #define DBUS_OP_SIZE 2
63 DBUS_STATUS_SUCCESS
= 0,
64 DBUS_STATUS_FAILED
= 2,
67 #define DBUS_DATA_START 2
68 #define DBUS_DATA_SIZE 34
69 #define DBUS_ADDRESS_START 36
77 /*** Debug Bus registers. ***/
79 #define DMCONTROL 0x10
80 #define DMCONTROL_INTERRUPT (((uint64_t)1)<<33)
81 #define DMCONTROL_HALTNOT (((uint64_t)1)<<32)
82 #define DMCONTROL_BUSERROR (7<<19)
83 #define DMCONTROL_SERIAL (3<<16)
84 #define DMCONTROL_AUTOINCREMENT (1<<15)
85 #define DMCONTROL_ACCESS (7<<12)
86 #define DMCONTROL_HARTID (0x3ff<<2)
87 #define DMCONTROL_NDRESET (1<<1)
88 #define DMCONTROL_FULLRESET 1
91 #define DMINFO_ABUSSIZE (0x7fU<<25)
92 #define DMINFO_SERIALCOUNT (0xf<<21)
93 #define DMINFO_ACCESS128 (1<<20)
94 #define DMINFO_ACCESS64 (1<<19)
95 #define DMINFO_ACCESS32 (1<<18)
96 #define DMINFO_ACCESS16 (1<<17)
97 #define DMINFO_ACCESS8 (1<<16)
98 #define DMINFO_DRAMSIZE (0x3f<<10)
99 #define DMINFO_AUTHENTICATED (1<<5)
100 #define DMINFO_AUTHBUSY (1<<4)
101 #define DMINFO_AUTHTYPE (3<<2)
102 #define DMINFO_VERSION 3
104 /*** Info about the core being debugged. ***/
106 #define DBUS_ADDRESS_UNKNOWN 0xffff
109 #define DRAM_CACHE_SIZE 16
111 uint8_t ir_dtmcontrol
[4] = {DTMCONTROL
};
112 struct scan_field select_dtmcontrol
= {
114 .out_value
= ir_dtmcontrol
116 uint8_t ir_dbus
[4] = {DBUS
};
117 struct scan_field select_dbus
= {
121 uint8_t ir_idcode
[4] = {0x1};
122 struct scan_field select_idcode
= {
124 .out_value
= ir_idcode
127 bscan_tunnel_type_t bscan_tunnel_type
;
128 int bscan_tunnel_ir_width
; /* if zero, then tunneling is not present/active */
130 static uint8_t bscan_zero
[4] = {0};
131 static uint8_t bscan_one
[4] = {1};
133 uint8_t ir_user4
[4] = {0x23};
134 struct scan_field select_user4
= {
136 .out_value
= ir_user4
140 uint8_t bscan_tunneled_ir_width
[4] = {5}; /* overridden by assignment in riscv_init_target */
141 struct scan_field _bscan_tunnel_data_register_select_dmi
[] = {
144 .out_value
= bscan_zero
,
148 .num_bits
= 5, /* initialized in riscv_init_target to ir width of DM */
149 .out_value
= ir_dbus
,
154 .out_value
= bscan_tunneled_ir_width
,
159 .out_value
= bscan_zero
,
164 struct scan_field _bscan_tunnel_nested_tap_select_dmi
[] = {
167 .out_value
= bscan_zero
,
172 .out_value
= bscan_tunneled_ir_width
,
176 .num_bits
= 0, /* initialized in riscv_init_target to ir width of DM */
177 .out_value
= ir_dbus
,
182 .out_value
= bscan_zero
,
186 struct scan_field
*bscan_tunnel_nested_tap_select_dmi
= _bscan_tunnel_nested_tap_select_dmi
;
187 uint32_t bscan_tunnel_nested_tap_select_dmi_num_fields
= DIM(_bscan_tunnel_nested_tap_select_dmi
);
189 struct scan_field
*bscan_tunnel_data_register_select_dmi
= _bscan_tunnel_data_register_select_dmi
;
190 uint32_t bscan_tunnel_data_register_select_dmi_num_fields
= DIM(_bscan_tunnel_data_register_select_dmi
);
197 bool read
, write
, execute
;
201 /* Wall-clock timeout for a command/access. Settable via RISC-V Target commands.*/
202 int riscv_command_timeout_sec
= DEFAULT_COMMAND_TIMEOUT_SEC
;
204 /* Wall-clock timeout after reset. Settable via RISC-V Target commands.*/
205 int riscv_reset_timeout_sec
= DEFAULT_RESET_TIMEOUT_SEC
;
207 bool riscv_prefer_sba
;
208 bool riscv_enable_virt2phys
= true;
209 bool riscv_ebreakm
= true;
210 bool riscv_ebreaks
= true;
211 bool riscv_ebreaku
= true;
213 bool riscv_enable_virtual
;
219 /* In addition to the ones in the standard spec, we'll also expose additional
221 * The list is either NULL, or a series of ranges (inclusive), terminated with
224 /* Same, but for custom registers. */
225 range_t
*expose_custom
;
232 virt2phys_info_t sv32
= {
237 .vpn_shift
= {12, 22},
238 .vpn_mask
= {0x3ff, 0x3ff},
239 .pte_ppn_shift
= {10, 20},
240 .pte_ppn_mask
= {0x3ff, 0xfff},
241 .pa_ppn_shift
= {12, 22},
242 .pa_ppn_mask
= {0x3ff, 0xfff},
245 virt2phys_info_t sv39
= {
250 .vpn_shift
= {12, 21, 30},
251 .vpn_mask
= {0x1ff, 0x1ff, 0x1ff},
252 .pte_ppn_shift
= {10, 19, 28},
253 .pte_ppn_mask
= {0x1ff, 0x1ff, 0x3ffffff},
254 .pa_ppn_shift
= {12, 21, 30},
255 .pa_ppn_mask
= {0x1ff, 0x1ff, 0x3ffffff},
258 virt2phys_info_t sv48
= {
263 .vpn_shift
= {12, 21, 30, 39},
264 .vpn_mask
= {0x1ff, 0x1ff, 0x1ff, 0x1ff},
265 .pte_ppn_shift
= {10, 19, 28, 37},
266 .pte_ppn_mask
= {0x1ff, 0x1ff, 0x1ff, 0x1ffff},
267 .pa_ppn_shift
= {12, 21, 30, 39},
268 .pa_ppn_mask
= {0x1ff, 0x1ff, 0x1ff, 0x1ffff},
271 static int riscv_resume_go_all_harts(struct target
*target
);
273 void select_dmi_via_bscan(struct target
*target
)
275 jtag_add_ir_scan(target
->tap
, &select_user4
, TAP_IDLE
);
276 if (bscan_tunnel_type
== BSCAN_TUNNEL_DATA_REGISTER
)
277 jtag_add_dr_scan(target
->tap
, bscan_tunnel_data_register_select_dmi_num_fields
,
278 bscan_tunnel_data_register_select_dmi
, TAP_IDLE
);
279 else /* BSCAN_TUNNEL_NESTED_TAP */
280 jtag_add_dr_scan(target
->tap
, bscan_tunnel_nested_tap_select_dmi_num_fields
,
281 bscan_tunnel_nested_tap_select_dmi
, TAP_IDLE
);
284 uint32_t dtmcontrol_scan_via_bscan(struct target
*target
, uint32_t out
)
286 /* On BSCAN TAP: Select IR=USER4, issue tunneled IR scan via BSCAN TAP's DR */
287 uint8_t tunneled_ir_width
[4] = {bscan_tunnel_ir_width
};
288 uint8_t tunneled_dr_width
[4] = {32};
289 uint8_t out_value
[5] = {0};
290 uint8_t in_value
[5] = {0};
292 buf_set_u32(out_value
, 0, 32, out
);
293 struct scan_field tunneled_ir
[4] = {};
294 struct scan_field tunneled_dr
[4] = {};
296 if (bscan_tunnel_type
== BSCAN_TUNNEL_DATA_REGISTER
) {
297 tunneled_ir
[0].num_bits
= 3;
298 tunneled_ir
[0].out_value
= bscan_zero
;
299 tunneled_ir
[0].in_value
= NULL
;
300 tunneled_ir
[1].num_bits
= bscan_tunnel_ir_width
;
301 tunneled_ir
[1].out_value
= ir_dtmcontrol
;
302 tunneled_ir
[1].in_value
= NULL
;
303 tunneled_ir
[2].num_bits
= 7;
304 tunneled_ir
[2].out_value
= tunneled_ir_width
;
305 tunneled_ir
[2].in_value
= NULL
;
306 tunneled_ir
[3].num_bits
= 1;
307 tunneled_ir
[3].out_value
= bscan_zero
;
308 tunneled_ir
[3].in_value
= NULL
;
310 tunneled_dr
[0].num_bits
= 3;
311 tunneled_dr
[0].out_value
= bscan_zero
;
312 tunneled_dr
[0].in_value
= NULL
;
313 tunneled_dr
[1].num_bits
= 32 + 1;
314 tunneled_dr
[1].out_value
= out_value
;
315 tunneled_dr
[1].in_value
= in_value
;
316 tunneled_dr
[2].num_bits
= 7;
317 tunneled_dr
[2].out_value
= tunneled_dr_width
;
318 tunneled_dr
[2].in_value
= NULL
;
319 tunneled_dr
[3].num_bits
= 1;
320 tunneled_dr
[3].out_value
= bscan_one
;
321 tunneled_dr
[3].in_value
= NULL
;
323 /* BSCAN_TUNNEL_NESTED_TAP */
324 tunneled_ir
[3].num_bits
= 3;
325 tunneled_ir
[3].out_value
= bscan_zero
;
326 tunneled_ir
[3].in_value
= NULL
;
327 tunneled_ir
[2].num_bits
= bscan_tunnel_ir_width
;
328 tunneled_ir
[2].out_value
= ir_dtmcontrol
;
329 tunneled_ir
[1].in_value
= NULL
;
330 tunneled_ir
[1].num_bits
= 7;
331 tunneled_ir
[1].out_value
= tunneled_ir_width
;
332 tunneled_ir
[2].in_value
= NULL
;
333 tunneled_ir
[0].num_bits
= 1;
334 tunneled_ir
[0].out_value
= bscan_zero
;
335 tunneled_ir
[0].in_value
= NULL
;
337 tunneled_dr
[3].num_bits
= 3;
338 tunneled_dr
[3].out_value
= bscan_zero
;
339 tunneled_dr
[3].in_value
= NULL
;
340 tunneled_dr
[2].num_bits
= 32 + 1;
341 tunneled_dr
[2].out_value
= out_value
;
342 tunneled_dr
[2].in_value
= in_value
;
343 tunneled_dr
[1].num_bits
= 7;
344 tunneled_dr
[1].out_value
= tunneled_dr_width
;
345 tunneled_dr
[1].in_value
= NULL
;
346 tunneled_dr
[0].num_bits
= 1;
347 tunneled_dr
[0].out_value
= bscan_one
;
348 tunneled_dr
[0].in_value
= NULL
;
350 jtag_add_ir_scan(target
->tap
, &select_user4
, TAP_IDLE
);
351 jtag_add_dr_scan(target
->tap
, DIM(tunneled_ir
), tunneled_ir
, TAP_IDLE
);
352 jtag_add_dr_scan(target
->tap
, DIM(tunneled_dr
), tunneled_dr
, TAP_IDLE
);
353 select_dmi_via_bscan(target
);
355 int retval
= jtag_execute_queue();
356 if (retval
!= ERROR_OK
) {
357 LOG_ERROR("failed jtag scan: %d", retval
);
360 /* Note the starting offset is bit 1, not bit 0. In BSCAN tunnel, there is a one-bit TCK skew between
362 uint32_t in
= buf_get_u32(in_value
, 1, 32);
363 LOG_DEBUG("DTMCS: 0x%x -> 0x%x", out
, in
);
370 static uint32_t dtmcontrol_scan(struct target
*target
, uint32_t out
)
372 struct scan_field field
;
374 uint8_t out_value
[4] = { 0 };
376 if (bscan_tunnel_ir_width
!= 0)
377 return dtmcontrol_scan_via_bscan(target
, out
);
380 buf_set_u32(out_value
, 0, 32, out
);
382 jtag_add_ir_scan(target
->tap
, &select_dtmcontrol
, TAP_IDLE
);
385 field
.out_value
= out_value
;
386 field
.in_value
= in_value
;
387 jtag_add_dr_scan(target
->tap
, 1, &field
, TAP_IDLE
);
389 /* Always return to dbus. */
390 jtag_add_ir_scan(target
->tap
, &select_dbus
, TAP_IDLE
);
392 int retval
= jtag_execute_queue();
393 if (retval
!= ERROR_OK
) {
394 LOG_ERROR("failed jtag scan: %d", retval
);
398 uint32_t in
= buf_get_u32(field
.in_value
, 0, 32);
399 LOG_DEBUG("DTMCONTROL: 0x%x -> 0x%x", out
, in
);
404 static struct target_type
*get_target_type(struct target
*target
)
406 riscv_info_t
*info
= (riscv_info_t
*) target
->arch_info
;
409 LOG_ERROR("Target has not been initialized");
413 switch (info
->dtm_version
) {
415 return &riscv011_target
;
417 return &riscv013_target
;
419 LOG_ERROR("Unsupported DTM version: %d", info
->dtm_version
);
424 static int riscv_init_target(struct command_context
*cmd_ctx
,
425 struct target
*target
)
427 LOG_DEBUG("riscv_init_target()");
428 target
->arch_info
= calloc(1, sizeof(riscv_info_t
));
429 if (!target
->arch_info
)
431 riscv_info_t
*info
= (riscv_info_t
*) target
->arch_info
;
432 riscv_info_init(target
, info
);
433 info
->cmd_ctx
= cmd_ctx
;
435 select_dtmcontrol
.num_bits
= target
->tap
->ir_length
;
436 select_dbus
.num_bits
= target
->tap
->ir_length
;
437 select_idcode
.num_bits
= target
->tap
->ir_length
;
439 if (bscan_tunnel_ir_width
!= 0) {
440 select_user4
.num_bits
= target
->tap
->ir_length
;
441 bscan_tunneled_ir_width
[0] = bscan_tunnel_ir_width
;
442 if (bscan_tunnel_type
== BSCAN_TUNNEL_DATA_REGISTER
)
443 bscan_tunnel_data_register_select_dmi
[1].num_bits
= bscan_tunnel_ir_width
;
444 else /* BSCAN_TUNNEL_NESTED_TAP */
445 bscan_tunnel_nested_tap_select_dmi
[2].num_bits
= bscan_tunnel_ir_width
;
448 riscv_semihosting_init(target
);
450 target
->debug_reason
= DBG_REASON_DBGRQ
;
455 static void riscv_free_registers(struct target
*target
)
457 /* Free the shared structure use for most registers. */
458 if (target
->reg_cache
) {
459 if (target
->reg_cache
->reg_list
) {
460 free(target
->reg_cache
->reg_list
[0].arch_info
);
461 /* Free the ones we allocated separately. */
462 for (unsigned i
= GDB_REGNO_COUNT
; i
< target
->reg_cache
->num_regs
; i
++)
463 free(target
->reg_cache
->reg_list
[i
].arch_info
);
464 free(target
->reg_cache
->reg_list
);
466 free(target
->reg_cache
);
470 static void riscv_deinit_target(struct target
*target
)
472 LOG_DEBUG("riscv_deinit_target()");
473 struct target_type
*tt
= get_target_type(target
);
475 tt
->deinit_target(target
);
476 riscv_info_t
*info
= (riscv_info_t
*) target
->arch_info
;
477 free(info
->reg_names
);
481 riscv_free_registers(target
);
483 target
->arch_info
= NULL
;
486 static void trigger_from_breakpoint(struct trigger
*trigger
,
487 const struct breakpoint
*breakpoint
)
489 trigger
->address
= breakpoint
->address
;
490 trigger
->length
= breakpoint
->length
;
491 trigger
->mask
= ~0LL;
492 trigger
->read
= false;
493 trigger
->write
= false;
494 trigger
->execute
= true;
495 /* unique_id is unique across both breakpoints and watchpoints. */
496 trigger
->unique_id
= breakpoint
->unique_id
;
499 static int maybe_add_trigger_t1(struct target
*target
, unsigned hartid
,
500 struct trigger
*trigger
, uint64_t tdata1
)
504 const uint32_t bpcontrol_x
= 1<<0;
505 const uint32_t bpcontrol_w
= 1<<1;
506 const uint32_t bpcontrol_r
= 1<<2;
507 const uint32_t bpcontrol_u
= 1<<3;
508 const uint32_t bpcontrol_s
= 1<<4;
509 const uint32_t bpcontrol_h
= 1<<5;
510 const uint32_t bpcontrol_m
= 1<<6;
511 const uint32_t bpcontrol_bpmatch
= 0xf << 7;
512 const uint32_t bpcontrol_bpaction
= 0xff << 11;
514 if (tdata1
& (bpcontrol_r
| bpcontrol_w
| bpcontrol_x
)) {
515 /* Trigger is already in use, presumably by user code. */
516 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
519 tdata1
= set_field(tdata1
, bpcontrol_r
, trigger
->read
);
520 tdata1
= set_field(tdata1
, bpcontrol_w
, trigger
->write
);
521 tdata1
= set_field(tdata1
, bpcontrol_x
, trigger
->execute
);
522 tdata1
= set_field(tdata1
, bpcontrol_u
,
523 !!(r
->misa
[hartid
] & (1 << ('U' - 'A'))));
524 tdata1
= set_field(tdata1
, bpcontrol_s
,
525 !!(r
->misa
[hartid
] & (1 << ('S' - 'A'))));
526 tdata1
= set_field(tdata1
, bpcontrol_h
,
527 !!(r
->misa
[hartid
] & (1 << ('H' - 'A'))));
528 tdata1
|= bpcontrol_m
;
529 tdata1
= set_field(tdata1
, bpcontrol_bpmatch
, 0); /* exact match */
530 tdata1
= set_field(tdata1
, bpcontrol_bpaction
, 0); /* cause bp exception */
532 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, tdata1
);
534 riscv_reg_t tdata1_rb
;
535 if (riscv_get_register_on_hart(target
, &tdata1_rb
, hartid
,
536 GDB_REGNO_TDATA1
) != ERROR_OK
)
538 LOG_DEBUG("tdata1=0x%" PRIx64
, tdata1_rb
);
540 if (tdata1
!= tdata1_rb
) {
541 LOG_DEBUG("Trigger doesn't support what we need; After writing 0x%"
542 PRIx64
" to tdata1 it contains 0x%" PRIx64
,
544 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, 0);
545 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
548 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA2
, trigger
->address
);
553 static int maybe_add_trigger_t2(struct target
*target
, unsigned hartid
,
554 struct trigger
*trigger
, uint64_t tdata1
)
558 /* tselect is already set */
559 if (tdata1
& (MCONTROL_EXECUTE
| MCONTROL_STORE
| MCONTROL_LOAD
)) {
560 /* Trigger is already in use, presumably by user code. */
561 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
564 /* address/data match trigger */
565 tdata1
|= MCONTROL_DMODE(riscv_xlen(target
));
566 tdata1
= set_field(tdata1
, MCONTROL_ACTION
,
567 MCONTROL_ACTION_DEBUG_MODE
);
568 tdata1
= set_field(tdata1
, MCONTROL_MATCH
, MCONTROL_MATCH_EQUAL
);
569 tdata1
|= MCONTROL_M
;
570 if (r
->misa
[hartid
] & (1 << ('H' - 'A')))
571 tdata1
|= MCONTROL_H
;
572 if (r
->misa
[hartid
] & (1 << ('S' - 'A')))
573 tdata1
|= MCONTROL_S
;
574 if (r
->misa
[hartid
] & (1 << ('U' - 'A')))
575 tdata1
|= MCONTROL_U
;
577 if (trigger
->execute
)
578 tdata1
|= MCONTROL_EXECUTE
;
580 tdata1
|= MCONTROL_LOAD
;
582 tdata1
|= MCONTROL_STORE
;
584 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, tdata1
);
587 int result
= riscv_get_register_on_hart(target
, &tdata1_rb
, hartid
, GDB_REGNO_TDATA1
);
588 if (result
!= ERROR_OK
)
590 LOG_DEBUG("tdata1=0x%" PRIx64
, tdata1_rb
);
592 if (tdata1
!= tdata1_rb
) {
593 LOG_DEBUG("Trigger doesn't support what we need; After writing 0x%"
594 PRIx64
" to tdata1 it contains 0x%" PRIx64
,
596 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, 0);
597 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
600 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA2
, trigger
->address
);
605 static int add_trigger(struct target
*target
, struct trigger
*trigger
)
609 if (riscv_enumerate_triggers(target
) != ERROR_OK
)
612 /* In RTOS mode, we need to set the same trigger in the same slot on every
613 * hart, to keep up the illusion that each hart is a thread running on the
616 /* Otherwise, we just set the trigger on the one hart this target deals
619 riscv_reg_t tselect
[RISCV_MAX_HARTS
];
622 for (int hartid
= 0; hartid
< riscv_count_harts(target
); ++hartid
) {
623 if (!riscv_hart_enabled(target
, hartid
))
627 int result
= riscv_get_register_on_hart(target
, &tselect
[hartid
],
628 hartid
, GDB_REGNO_TSELECT
);
629 if (result
!= ERROR_OK
)
632 assert(first_hart
>= 0);
635 for (i
= 0; i
< r
->trigger_count
[first_hart
]; i
++) {
636 if (r
->trigger_unique_id
[i
] != -1)
639 riscv_set_register_on_hart(target
, first_hart
, GDB_REGNO_TSELECT
, i
);
642 int result
= riscv_get_register_on_hart(target
, &tdata1
, first_hart
,
644 if (result
!= ERROR_OK
)
646 int type
= get_field(tdata1
, MCONTROL_TYPE(riscv_xlen(target
)));
649 for (int hartid
= first_hart
; hartid
< riscv_count_harts(target
); ++hartid
) {
650 if (!riscv_hart_enabled(target
, hartid
))
652 if (hartid
> first_hart
)
653 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
, i
);
656 result
= maybe_add_trigger_t1(target
, hartid
, trigger
, tdata1
);
659 result
= maybe_add_trigger_t2(target
, hartid
, trigger
, tdata1
);
662 LOG_DEBUG("trigger %d has unknown type %d", i
, type
);
666 if (result
!= ERROR_OK
)
670 if (result
!= ERROR_OK
)
673 LOG_DEBUG("[%d] Using trigger %d (type %d) for bp %d", target
->coreid
,
674 i
, type
, trigger
->unique_id
);
675 r
->trigger_unique_id
[i
] = trigger
->unique_id
;
679 for (int hartid
= first_hart
; hartid
< riscv_count_harts(target
); ++hartid
) {
680 if (!riscv_hart_enabled(target
, hartid
))
682 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
,
686 if (i
>= r
->trigger_count
[first_hart
]) {
687 LOG_ERROR("Couldn't find an available hardware trigger.");
688 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
694 int riscv_add_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
696 LOG_DEBUG("[%d] @0x%" TARGET_PRIxADDR
, target
->coreid
, breakpoint
->address
);
698 if (breakpoint
->type
== BKPT_SOFT
) {
699 /** @todo check RVC for size/alignment */
700 if (!(breakpoint
->length
== 4 || breakpoint
->length
== 2)) {
701 LOG_ERROR("Invalid breakpoint length %d", breakpoint
->length
);
705 if (0 != (breakpoint
->address
% 2)) {
706 LOG_ERROR("Invalid breakpoint alignment for address 0x%" TARGET_PRIxADDR
, breakpoint
->address
);
710 if (target_read_memory(target
, breakpoint
->address
, 2, breakpoint
->length
/ 2,
711 breakpoint
->orig_instr
) != ERROR_OK
) {
712 LOG_ERROR("Failed to read original instruction at 0x%" TARGET_PRIxADDR
,
713 breakpoint
->address
);
717 uint8_t buff
[4] = { 0 };
718 buf_set_u32(buff
, 0, breakpoint
->length
* CHAR_BIT
, breakpoint
->length
== 4 ? ebreak() : ebreak_c());
719 int const retval
= target_write_memory(target
, breakpoint
->address
, 2, breakpoint
->length
/ 2, buff
);
721 if (retval
!= ERROR_OK
) {
722 LOG_ERROR("Failed to write %d-byte breakpoint instruction at 0x%"
723 TARGET_PRIxADDR
, breakpoint
->length
, breakpoint
->address
);
727 } else if (breakpoint
->type
== BKPT_HARD
) {
728 struct trigger trigger
;
729 trigger_from_breakpoint(&trigger
, breakpoint
);
730 int const result
= add_trigger(target
, &trigger
);
731 if (result
!= ERROR_OK
)
734 LOG_INFO("OpenOCD only supports hardware and software breakpoints.");
735 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
738 breakpoint
->set
= true;
742 static int remove_trigger(struct target
*target
, struct trigger
*trigger
)
746 if (riscv_enumerate_triggers(target
) != ERROR_OK
)
750 for (int hartid
= 0; hartid
< riscv_count_harts(target
); ++hartid
) {
751 if (!riscv_hart_enabled(target
, hartid
))
753 if (first_hart
< 0) {
758 assert(first_hart
>= 0);
761 for (i
= 0; i
< r
->trigger_count
[first_hart
]; i
++) {
762 if (r
->trigger_unique_id
[i
] == trigger
->unique_id
)
765 if (i
>= r
->trigger_count
[first_hart
]) {
766 LOG_ERROR("Couldn't find the hardware resources used by hardware "
770 LOG_DEBUG("[%d] Stop using resource %d for bp %d", target
->coreid
, i
,
772 for (int hartid
= first_hart
; hartid
< riscv_count_harts(target
); ++hartid
) {
773 if (!riscv_hart_enabled(target
, hartid
))
776 int result
= riscv_get_register_on_hart(target
, &tselect
, hartid
, GDB_REGNO_TSELECT
);
777 if (result
!= ERROR_OK
)
779 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
, i
);
780 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, 0);
781 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
, tselect
);
783 r
->trigger_unique_id
[i
] = -1;
788 int riscv_remove_breakpoint(struct target
*target
,
789 struct breakpoint
*breakpoint
)
791 if (breakpoint
->type
== BKPT_SOFT
) {
792 if (target_write_memory(target
, breakpoint
->address
, 2, breakpoint
->length
/ 2,
793 breakpoint
->orig_instr
) != ERROR_OK
) {
794 LOG_ERROR("Failed to restore instruction for %d-byte breakpoint at "
795 "0x%" TARGET_PRIxADDR
, breakpoint
->length
, breakpoint
->address
);
799 } else if (breakpoint
->type
== BKPT_HARD
) {
800 struct trigger trigger
;
801 trigger_from_breakpoint(&trigger
, breakpoint
);
802 int result
= remove_trigger(target
, &trigger
);
803 if (result
!= ERROR_OK
)
807 LOG_INFO("OpenOCD only supports hardware and software breakpoints.");
808 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
811 breakpoint
->set
= false;
816 static void trigger_from_watchpoint(struct trigger
*trigger
,
817 const struct watchpoint
*watchpoint
)
819 trigger
->address
= watchpoint
->address
;
820 trigger
->length
= watchpoint
->length
;
821 trigger
->mask
= watchpoint
->mask
;
822 trigger
->value
= watchpoint
->value
;
823 trigger
->read
= (watchpoint
->rw
== WPT_READ
|| watchpoint
->rw
== WPT_ACCESS
);
824 trigger
->write
= (watchpoint
->rw
== WPT_WRITE
|| watchpoint
->rw
== WPT_ACCESS
);
825 trigger
->execute
= false;
826 /* unique_id is unique across both breakpoints and watchpoints. */
827 trigger
->unique_id
= watchpoint
->unique_id
;
830 int riscv_add_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
832 struct trigger trigger
;
833 trigger_from_watchpoint(&trigger
, watchpoint
);
835 int result
= add_trigger(target
, &trigger
);
836 if (result
!= ERROR_OK
)
838 watchpoint
->set
= true;
843 int riscv_remove_watchpoint(struct target
*target
,
844 struct watchpoint
*watchpoint
)
846 LOG_DEBUG("[%d] @0x%" TARGET_PRIxADDR
, target
->coreid
, watchpoint
->address
);
848 struct trigger trigger
;
849 trigger_from_watchpoint(&trigger
, watchpoint
);
851 int result
= remove_trigger(target
, &trigger
);
852 if (result
!= ERROR_OK
)
854 watchpoint
->set
= false;
859 /* Sets *hit_watchpoint to the first watchpoint identified as causing the
862 * The GDB server uses this information to tell GDB what data address has
863 * been hit, which enables GDB to print the hit variable along with its old
865 int riscv_hit_watchpoint(struct target
*target
, struct watchpoint
**hit_watchpoint
)
867 struct watchpoint
*wp
= target
->watchpoints
;
869 if (riscv_rtos_enabled(target
))
870 riscv_set_current_hartid(target
, target
->rtos
->current_thread
- 1);
871 LOG_DEBUG("Current hartid = %d", riscv_current_hartid(target
));
873 /*TODO instead of disassembling the instruction that we think caused the
874 * trigger, check the hit bit of each watchpoint first. The hit bit is
875 * simpler and more reliable to check but as it is optional and relatively
876 * new, not all hardware will implement it */
878 riscv_get_register(target
, &dpc
, GDB_REGNO_DPC
);
879 const uint8_t length
= 4;
880 LOG_DEBUG("dpc is 0x%" PRIx64
, dpc
);
882 /* fetch the instruction at dpc */
883 uint8_t buffer
[length
];
884 if (target_read_buffer(target
, dpc
, length
, buffer
) != ERROR_OK
) {
885 LOG_ERROR("Failed to read instruction at dpc 0x%" PRIx64
, dpc
);
889 uint32_t instruction
= 0;
891 for (int i
= 0; i
< length
; i
++) {
892 LOG_DEBUG("Next byte is %x", buffer
[i
]);
893 instruction
+= (buffer
[i
] << 8 * i
);
895 LOG_DEBUG("Full instruction is %x", instruction
);
897 /* find out which memory address is accessed by the instruction at dpc */
898 /* opcode is first 7 bits of the instruction */
899 uint8_t opcode
= instruction
& 0x7F;
902 riscv_reg_t mem_addr
;
904 if (opcode
== MATCH_LB
|| opcode
== MATCH_SB
) {
905 rs1
= (instruction
& 0xf8000) >> 15;
906 riscv_get_register(target
, &mem_addr
, rs1
);
908 if (opcode
== MATCH_SB
) {
909 LOG_DEBUG("%x is store instruction", instruction
);
910 imm
= ((instruction
& 0xf80) >> 7) | ((instruction
& 0xfe000000) >> 20);
912 LOG_DEBUG("%x is load instruction", instruction
);
913 imm
= (instruction
& 0xfff00000) >> 20;
915 /* sign extend 12-bit imm to 16-bits */
919 LOG_DEBUG("memory address=0x%" PRIx64
, mem_addr
);
921 LOG_DEBUG("%x is not a RV32I load or store", instruction
);
926 /*TODO support length/mask */
927 if (wp
->address
== mem_addr
) {
928 *hit_watchpoint
= wp
;
929 LOG_DEBUG("Hit address=%" TARGET_PRIxADDR
, wp
->address
);
935 /* No match found - either we hit a watchpoint caused by an instruction that
936 * this function does not yet disassemble, or we hit a breakpoint.
938 * OpenOCD will behave as if this function had never been implemented i.e.
939 * report the halt to GDB with no address information. */
944 static int oldriscv_step(struct target
*target
, int current
, uint32_t address
,
945 int handle_breakpoints
)
947 struct target_type
*tt
= get_target_type(target
);
948 return tt
->step(target
, current
, address
, handle_breakpoints
);
951 static int old_or_new_riscv_step(struct target
*target
, int current
,
952 target_addr_t address
, int handle_breakpoints
)
955 LOG_DEBUG("handle_breakpoints=%d", handle_breakpoints
);
956 if (r
->is_halted
== NULL
)
957 return oldriscv_step(target
, current
, address
, handle_breakpoints
);
959 return riscv_openocd_step(target
, current
, address
, handle_breakpoints
);
963 static int riscv_examine(struct target
*target
)
965 LOG_DEBUG("riscv_examine()");
966 if (target_was_examined(target
)) {
967 LOG_DEBUG("Target was already examined.");
971 /* Don't need to select dbus, since the first thing we do is read dtmcontrol. */
973 riscv_info_t
*info
= (riscv_info_t
*) target
->arch_info
;
974 uint32_t dtmcontrol
= dtmcontrol_scan(target
, 0);
975 LOG_DEBUG("dtmcontrol=0x%x", dtmcontrol
);
976 info
->dtm_version
= get_field(dtmcontrol
, DTMCONTROL_VERSION
);
977 LOG_DEBUG(" version=0x%x", info
->dtm_version
);
979 struct target_type
*tt
= get_target_type(target
);
983 int result
= tt
->init_target(info
->cmd_ctx
, target
);
984 if (result
!= ERROR_OK
)
987 return tt
->examine(target
);
990 static int oldriscv_poll(struct target
*target
)
992 struct target_type
*tt
= get_target_type(target
);
993 return tt
->poll(target
);
996 static int old_or_new_riscv_poll(struct target
*target
)
999 if (r
->is_halted
== NULL
)
1000 return oldriscv_poll(target
);
1002 return riscv_openocd_poll(target
);
1005 int halt_prep(struct target
*target
)
1008 for (int i
= 0; i
< riscv_count_harts(target
); ++i
) {
1009 if (!riscv_hart_enabled(target
, i
))
1012 LOG_DEBUG("[%s] prep hart, debug_reason=%d", target_name(target
),
1013 target
->debug_reason
);
1014 if (riscv_set_current_hartid(target
, i
) != ERROR_OK
)
1016 if (riscv_is_halted(target
)) {
1017 LOG_DEBUG("Hart %d is already halted (reason=%d).", i
,
1018 target
->debug_reason
);
1020 if (r
->halt_prep(target
) != ERROR_OK
)
1028 int riscv_halt_go_all_harts(struct target
*target
)
1031 for (int i
= 0; i
< riscv_count_harts(target
); ++i
) {
1032 if (!riscv_hart_enabled(target
, i
))
1035 if (riscv_set_current_hartid(target
, i
) != ERROR_OK
)
1037 if (riscv_is_halted(target
)) {
1038 LOG_DEBUG("Hart %d is already halted.", i
);
1040 if (r
->halt_go(target
) != ERROR_OK
)
1045 riscv_invalidate_register_cache(target
);
1050 int halt_go(struct target
*target
)
1052 riscv_info_t
*r
= riscv_info(target
);
1054 if (r
->is_halted
== NULL
) {
1055 struct target_type
*tt
= get_target_type(target
);
1056 result
= tt
->halt(target
);
1058 result
= riscv_halt_go_all_harts(target
);
1060 target
->state
= TARGET_HALTED
;
1061 if (target
->debug_reason
== DBG_REASON_NOTHALTED
)
1062 target
->debug_reason
= DBG_REASON_DBGRQ
;
1067 static int halt_finish(struct target
*target
)
1069 return target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1072 int riscv_halt(struct target
*target
)
1076 if (r
->is_halted
== NULL
) {
1077 struct target_type
*tt
= get_target_type(target
);
1078 return tt
->halt(target
);
1081 LOG_DEBUG("[%d] halting all harts", target
->coreid
);
1083 int result
= ERROR_OK
;
1085 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1086 struct target
*t
= tlist
->target
;
1087 if (halt_prep(t
) != ERROR_OK
)
1088 result
= ERROR_FAIL
;
1091 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1092 struct target
*t
= tlist
->target
;
1093 riscv_info_t
*i
= riscv_info(t
);
1095 if (halt_go(t
) != ERROR_OK
)
1096 result
= ERROR_FAIL
;
1100 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1101 struct target
*t
= tlist
->target
;
1102 if (halt_finish(t
) != ERROR_OK
)
1107 if (halt_prep(target
) != ERROR_OK
)
1108 result
= ERROR_FAIL
;
1109 if (halt_go(target
) != ERROR_OK
)
1110 result
= ERROR_FAIL
;
1111 if (halt_finish(target
) != ERROR_OK
)
1115 if (riscv_rtos_enabled(target
)) {
1116 if (r
->rtos_hartid
!= -1) {
1117 LOG_DEBUG("halt requested on RTOS hartid %d", r
->rtos_hartid
);
1118 target
->rtos
->current_threadid
= r
->rtos_hartid
+ 1;
1119 target
->rtos
->current_thread
= r
->rtos_hartid
+ 1;
1121 LOG_DEBUG("halt requested, but no known RTOS hartid");
1127 static int riscv_assert_reset(struct target
*target
)
1129 LOG_DEBUG("[%d]", target
->coreid
);
1130 struct target_type
*tt
= get_target_type(target
);
1131 riscv_invalidate_register_cache(target
);
1132 return tt
->assert_reset(target
);
1135 static int riscv_deassert_reset(struct target
*target
)
1137 LOG_DEBUG("[%d]", target
->coreid
);
1138 struct target_type
*tt
= get_target_type(target
);
1139 return tt
->deassert_reset(target
);
1142 int riscv_resume_prep_all_harts(struct target
*target
)
1145 for (int i
= 0; i
< riscv_count_harts(target
); ++i
) {
1146 if (!riscv_hart_enabled(target
, i
))
1149 LOG_DEBUG("prep hart %d", i
);
1150 if (riscv_set_current_hartid(target
, i
) != ERROR_OK
)
1152 if (riscv_is_halted(target
)) {
1153 if (r
->resume_prep(target
) != ERROR_OK
)
1156 LOG_DEBUG(" hart %d requested resume, but was already resumed", i
);
1160 LOG_DEBUG("[%d] mark as prepped", target
->coreid
);
1166 /* state must be riscv_reg_t state[RISCV_MAX_HWBPS] = {0}; */
1167 static int disable_triggers(struct target
*target
, riscv_reg_t
*state
)
1171 LOG_DEBUG("deal with triggers");
1173 if (riscv_enumerate_triggers(target
) != ERROR_OK
)
1176 int hartid
= riscv_current_hartid(target
);
1177 if (r
->manual_hwbp_set
) {
1178 /* Look at every trigger that may have been set. */
1179 riscv_reg_t tselect
;
1180 if (riscv_get_register(target
, &tselect
, GDB_REGNO_TSELECT
) != ERROR_OK
)
1182 for (unsigned t
= 0; t
< r
->trigger_count
[hartid
]; t
++) {
1183 if (riscv_set_register(target
, GDB_REGNO_TSELECT
, t
) != ERROR_OK
)
1186 if (riscv_get_register(target
, &tdata1
, GDB_REGNO_TDATA1
) != ERROR_OK
)
1188 if (tdata1
& MCONTROL_DMODE(riscv_xlen(target
))) {
1190 if (riscv_set_register(target
, GDB_REGNO_TDATA1
, 0) != ERROR_OK
)
1194 if (riscv_set_register(target
, GDB_REGNO_TSELECT
, tselect
) != ERROR_OK
)
1198 /* Just go through the triggers we manage. */
1199 struct watchpoint
*watchpoint
= target
->watchpoints
;
1201 while (watchpoint
) {
1202 LOG_DEBUG("watchpoint %d: set=%d", i
, watchpoint
->set
);
1203 state
[i
] = watchpoint
->set
;
1204 if (watchpoint
->set
) {
1205 if (riscv_remove_watchpoint(target
, watchpoint
) != ERROR_OK
)
1208 watchpoint
= watchpoint
->next
;
1216 static int enable_triggers(struct target
*target
, riscv_reg_t
*state
)
1220 int hartid
= riscv_current_hartid(target
);
1222 if (r
->manual_hwbp_set
) {
1223 /* Look at every trigger that may have been set. */
1224 riscv_reg_t tselect
;
1225 if (riscv_get_register(target
, &tselect
, GDB_REGNO_TSELECT
) != ERROR_OK
)
1227 for (unsigned t
= 0; t
< r
->trigger_count
[hartid
]; t
++) {
1228 if (state
[t
] != 0) {
1229 if (riscv_set_register(target
, GDB_REGNO_TSELECT
, t
) != ERROR_OK
)
1231 if (riscv_set_register(target
, GDB_REGNO_TDATA1
, state
[t
]) != ERROR_OK
)
1235 if (riscv_set_register(target
, GDB_REGNO_TSELECT
, tselect
) != ERROR_OK
)
1239 struct watchpoint
*watchpoint
= target
->watchpoints
;
1241 while (watchpoint
) {
1242 LOG_DEBUG("watchpoint %d: cleared=%" PRId64
, i
, state
[i
]);
1244 if (riscv_add_watchpoint(target
, watchpoint
) != ERROR_OK
)
1247 watchpoint
= watchpoint
->next
;
1256 * Get everything ready to resume.
1258 static int resume_prep(struct target
*target
, int current
,
1259 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
1262 LOG_DEBUG("[%d]", target
->coreid
);
1265 riscv_set_register(target
, GDB_REGNO_PC
, address
);
1267 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
1268 /* To be able to run off a trigger, disable all the triggers, step, and
1269 * then resume as usual. */
1270 riscv_reg_t trigger_state
[RISCV_MAX_HWBPS
] = {0};
1272 if (disable_triggers(target
, trigger_state
) != ERROR_OK
)
1275 if (old_or_new_riscv_step(target
, true, 0, false) != ERROR_OK
)
1278 if (enable_triggers(target
, trigger_state
) != ERROR_OK
)
1283 if (riscv_resume_prep_all_harts(target
) != ERROR_OK
)
1287 LOG_DEBUG("[%d] mark as prepped", target
->coreid
);
1294 * Resume all the harts that have been prepped, as close to instantaneous as
1297 static int resume_go(struct target
*target
, int current
,
1298 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
1300 riscv_info_t
*r
= riscv_info(target
);
1302 if (r
->is_halted
== NULL
) {
1303 struct target_type
*tt
= get_target_type(target
);
1304 result
= tt
->resume(target
, current
, address
, handle_breakpoints
,
1307 result
= riscv_resume_go_all_harts(target
);
1313 static int resume_finish(struct target
*target
)
1315 register_cache_invalidate(target
->reg_cache
);
1317 target
->state
= TARGET_RUNNING
;
1318 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1319 return target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1323 * @par single_hart When true, only resume a single hart even if SMP is
1324 * configured. This is used to run algorithms on just one hart.
1327 struct target
*target
,
1329 target_addr_t address
,
1330 int handle_breakpoints
,
1331 int debug_execution
,
1334 LOG_DEBUG("handle_breakpoints=%d", handle_breakpoints
);
1335 int result
= ERROR_OK
;
1336 if (target
->smp
&& !single_hart
) {
1337 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1338 struct target
*t
= tlist
->target
;
1339 if (resume_prep(t
, current
, address
, handle_breakpoints
,
1340 debug_execution
) != ERROR_OK
)
1341 result
= ERROR_FAIL
;
1344 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1345 struct target
*t
= tlist
->target
;
1346 riscv_info_t
*i
= riscv_info(t
);
1348 if (resume_go(t
, current
, address
, handle_breakpoints
,
1349 debug_execution
) != ERROR_OK
)
1350 result
= ERROR_FAIL
;
1354 for (struct target_list
*tlist
= target
->head
; tlist
; tlist
= tlist
->next
) {
1355 struct target
*t
= tlist
->target
;
1356 if (resume_finish(t
) != ERROR_OK
)
1361 if (resume_prep(target
, current
, address
, handle_breakpoints
,
1362 debug_execution
) != ERROR_OK
)
1363 result
= ERROR_FAIL
;
1364 if (resume_go(target
, current
, address
, handle_breakpoints
,
1365 debug_execution
) != ERROR_OK
)
1366 result
= ERROR_FAIL
;
1367 if (resume_finish(target
) != ERROR_OK
)
1374 static int riscv_target_resume(struct target
*target
, int current
, target_addr_t address
,
1375 int handle_breakpoints
, int debug_execution
)
1377 return riscv_resume(target
, current
, address
, handle_breakpoints
,
1378 debug_execution
, false);
1381 static int riscv_select_current_hart(struct target
*target
)
1384 if (riscv_rtos_enabled(target
)) {
1385 if (r
->rtos_hartid
== -1)
1386 r
->rtos_hartid
= target
->rtos
->current_threadid
- 1;
1387 return riscv_set_current_hartid(target
, r
->rtos_hartid
);
1389 return riscv_set_current_hartid(target
, target
->coreid
);
1392 static int riscv_mmu(struct target
*target
, int *enabled
)
1394 if (!riscv_enable_virt2phys
) {
1399 if (riscv_rtos_enabled(target
))
1400 riscv_set_current_hartid(target
, target
->rtos
->current_thread
- 1);
1402 /* Don't use MMU in explicit or effective M (machine) mode */
1404 if (riscv_get_register(target
, &priv
, GDB_REGNO_PRIV
) != ERROR_OK
) {
1405 LOG_ERROR("Failed to read priv register.");
1409 riscv_reg_t mstatus
;
1410 if (riscv_get_register(target
, &mstatus
, GDB_REGNO_MSTATUS
) != ERROR_OK
) {
1411 LOG_ERROR("Failed to read mstatus register.");
1415 if ((get_field(mstatus
, MSTATUS_MPRV
) ? get_field(mstatus
, MSTATUS_MPP
) : priv
) == PRV_M
) {
1416 LOG_DEBUG("SATP/MMU ignored in Machine mode (mstatus=0x%" PRIx64
").", mstatus
);
1422 if (riscv_get_register(target
, &satp
, GDB_REGNO_SATP
) != ERROR_OK
) {
1423 LOG_DEBUG("Couldn't read SATP.");
1424 /* If we can't read SATP, then there must not be an MMU. */
1429 if (get_field(satp
, RISCV_SATP_MODE(riscv_xlen(target
))) == SATP_MODE_OFF
) {
1430 LOG_DEBUG("MMU is disabled.");
1433 LOG_DEBUG("MMU is enabled.");
1440 static int riscv_address_translate(struct target
*target
,
1441 target_addr_t
virtual, target_addr_t
*physical
)
1444 riscv_reg_t satp_value
;
1447 target_addr_t table_address
;
1448 virt2phys_info_t
*info
;
1452 if (riscv_rtos_enabled(target
))
1453 riscv_set_current_hartid(target
, target
->rtos
->current_thread
- 1);
1455 int result
= riscv_get_register(target
, &satp_value
, GDB_REGNO_SATP
);
1456 if (result
!= ERROR_OK
)
1459 unsigned xlen
= riscv_xlen(target
);
1460 mode
= get_field(satp_value
, RISCV_SATP_MODE(xlen
));
1462 case SATP_MODE_SV32
:
1465 case SATP_MODE_SV39
:
1468 case SATP_MODE_SV48
:
1472 LOG_ERROR("No translation or protection." \
1473 " (satp: 0x%" PRIx64
")", satp_value
);
1476 LOG_ERROR("The translation mode is not supported." \
1477 " (satp: 0x%" PRIx64
")", satp_value
);
1480 LOG_DEBUG("virtual=0x%" TARGET_PRIxADDR
"; mode=%s", virtual, info
->name
);
1482 /* verify bits xlen-1:va_bits-1 are all equal */
1483 target_addr_t mask
= ((target_addr_t
)1 << (xlen
- (info
->va_bits
- 1))) - 1;
1484 target_addr_t masked_msbs
= (virtual >> (info
->va_bits
- 1)) & mask
;
1485 if (masked_msbs
!= 0 && masked_msbs
!= mask
) {
1486 LOG_ERROR("Virtual address 0x%" TARGET_PRIxADDR
" is not sign-extended "
1487 "for %s mode.", virtual, info
->name
);
1491 ppn_value
= get_field(satp_value
, RISCV_SATP_PPN(xlen
));
1492 table_address
= ppn_value
<< RISCV_PGSHIFT
;
1493 i
= info
->level
- 1;
1495 uint64_t vpn
= virtual >> info
->vpn_shift
[i
];
1496 vpn
&= info
->vpn_mask
[i
];
1497 target_addr_t pte_address
= table_address
+
1498 (vpn
<< info
->pte_shift
);
1500 assert(info
->pte_shift
<= 3);
1501 int retval
= r
->read_memory(target
, pte_address
,
1502 4, (1 << info
->pte_shift
) / 4, buffer
, 4);
1503 if (retval
!= ERROR_OK
)
1506 if (info
->pte_shift
== 2)
1507 pte
= buf_get_u32(buffer
, 0, 32);
1509 pte
= buf_get_u64(buffer
, 0, 64);
1511 LOG_DEBUG("i=%d; PTE @0x%" TARGET_PRIxADDR
" = 0x%" PRIx64
, i
,
1514 if (!(pte
& PTE_V
) || (!(pte
& PTE_R
) && (pte
& PTE_W
)))
1517 if ((pte
& PTE_R
) || (pte
& PTE_X
)) /* Found leaf PTE. */
1523 ppn_value
= pte
>> PTE_PPN_SHIFT
;
1524 table_address
= ppn_value
<< RISCV_PGSHIFT
;
1528 LOG_ERROR("Couldn't find the PTE.");
1532 /* Make sure to clear out the high bits that may be set. */
1533 *physical
= virtual & (((target_addr_t
)1 << info
->va_bits
) - 1);
1535 while (i
< info
->level
) {
1536 ppn_value
= pte
>> info
->pte_ppn_shift
[i
];
1537 ppn_value
&= info
->pte_ppn_mask
[i
];
1538 *physical
&= ~(((target_addr_t
)info
->pa_ppn_mask
[i
]) <<
1539 info
->pa_ppn_shift
[i
]);
1540 *physical
|= (ppn_value
<< info
->pa_ppn_shift
[i
]);
1543 LOG_DEBUG("0x%" TARGET_PRIxADDR
" -> 0x%" TARGET_PRIxADDR
, virtual,
1549 static int riscv_virt2phys(struct target
*target
, target_addr_t
virtual, target_addr_t
*physical
)
1552 if (riscv_mmu(target
, &enabled
) == ERROR_OK
) {
1556 if (riscv_address_translate(target
, virtual, physical
) == ERROR_OK
)
1563 static int riscv_read_phys_memory(struct target
*target
, target_addr_t phys_address
,
1564 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1567 if (riscv_select_current_hart(target
) != ERROR_OK
)
1569 return r
->read_memory(target
, phys_address
, size
, count
, buffer
, size
);
1572 static int riscv_read_memory(struct target
*target
, target_addr_t address
,
1573 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1576 LOG_WARNING("0-length read from 0x%" TARGET_PRIxADDR
, address
);
1580 if (riscv_select_current_hart(target
) != ERROR_OK
)
1583 target_addr_t physical_addr
;
1584 if (target
->type
->virt2phys(target
, address
, &physical_addr
) == ERROR_OK
)
1585 address
= physical_addr
;
1588 return r
->read_memory(target
, address
, size
, count
, buffer
, size
);
1591 static int riscv_write_phys_memory(struct target
*target
, target_addr_t phys_address
,
1592 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
1594 if (riscv_select_current_hart(target
) != ERROR_OK
)
1596 struct target_type
*tt
= get_target_type(target
);
1597 return tt
->write_memory(target
, phys_address
, size
, count
, buffer
);
1600 static int riscv_write_memory(struct target
*target
, target_addr_t address
,
1601 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
1604 LOG_WARNING("0-length write to 0x%" TARGET_PRIxADDR
, address
);
1608 if (riscv_select_current_hart(target
) != ERROR_OK
)
1611 target_addr_t physical_addr
;
1612 if (target
->type
->virt2phys(target
, address
, &physical_addr
) == ERROR_OK
)
1613 address
= physical_addr
;
1615 struct target_type
*tt
= get_target_type(target
);
1616 return tt
->write_memory(target
, address
, size
, count
, buffer
);
1619 static int riscv_get_gdb_reg_list_internal(struct target
*target
,
1620 struct reg
**reg_list
[], int *reg_list_size
,
1621 enum target_register_class reg_class
, bool read
)
1624 LOG_DEBUG("rtos_hartid=%d, current_hartid=%d, reg_class=%d, read=%d",
1625 r
->rtos_hartid
, r
->current_hartid
, reg_class
, read
);
1627 if (!target
->reg_cache
) {
1628 LOG_ERROR("Target not initialized. Return ERROR_FAIL.");
1632 if (riscv_select_current_hart(target
) != ERROR_OK
)
1635 switch (reg_class
) {
1636 case REG_CLASS_GENERAL
:
1637 *reg_list_size
= 33;
1640 *reg_list_size
= target
->reg_cache
->num_regs
;
1643 LOG_ERROR("Unsupported reg_class: %d", reg_class
);
1647 *reg_list
= calloc(*reg_list_size
, sizeof(struct reg
*));
1651 for (int i
= 0; i
< *reg_list_size
; i
++) {
1652 assert(!target
->reg_cache
->reg_list
[i
].valid
||
1653 target
->reg_cache
->reg_list
[i
].size
> 0);
1654 (*reg_list
)[i
] = &target
->reg_cache
->reg_list
[i
];
1656 target
->reg_cache
->reg_list
[i
].exist
&&
1657 !target
->reg_cache
->reg_list
[i
].valid
) {
1658 if (target
->reg_cache
->reg_list
[i
].type
->get(
1659 &target
->reg_cache
->reg_list
[i
]) != ERROR_OK
)
1667 static int riscv_get_gdb_reg_list_noread(struct target
*target
,
1668 struct reg
**reg_list
[], int *reg_list_size
,
1669 enum target_register_class reg_class
)
1671 return riscv_get_gdb_reg_list_internal(target
, reg_list
, reg_list_size
,
1675 static int riscv_get_gdb_reg_list(struct target
*target
,
1676 struct reg
**reg_list
[], int *reg_list_size
,
1677 enum target_register_class reg_class
)
1679 return riscv_get_gdb_reg_list_internal(target
, reg_list
, reg_list_size
,
1683 static int riscv_arch_state(struct target
*target
)
1685 struct target_type
*tt
= get_target_type(target
);
1686 return tt
->arch_state(target
);
1689 /* Algorithm must end with a software breakpoint instruction. */
1690 static int riscv_run_algorithm(struct target
*target
, int num_mem_params
,
1691 struct mem_param
*mem_params
, int num_reg_params
,
1692 struct reg_param
*reg_params
, target_addr_t entry_point
,
1693 target_addr_t exit_point
, int timeout_ms
, void *arch_info
)
1695 riscv_info_t
*info
= (riscv_info_t
*) target
->arch_info
;
1696 int hartid
= riscv_current_hartid(target
);
1698 if (num_mem_params
> 0) {
1699 LOG_ERROR("Memory parameters are not supported for RISC-V algorithms.");
1703 if (target
->state
!= TARGET_HALTED
) {
1704 LOG_WARNING("target not halted");
1705 return ERROR_TARGET_NOT_HALTED
;
1708 /* Save registers */
1709 struct reg
*reg_pc
= register_get_by_name(target
->reg_cache
, "pc", 1);
1710 if (!reg_pc
|| reg_pc
->type
->get(reg_pc
) != ERROR_OK
)
1712 uint64_t saved_pc
= buf_get_u64(reg_pc
->value
, 0, reg_pc
->size
);
1713 LOG_DEBUG("saved_pc=0x%" PRIx64
, saved_pc
);
1715 uint64_t saved_regs
[32];
1716 for (int i
= 0; i
< num_reg_params
; i
++) {
1717 LOG_DEBUG("save %s", reg_params
[i
].reg_name
);
1718 struct reg
*r
= register_get_by_name(target
->reg_cache
, reg_params
[i
].reg_name
, 0);
1720 LOG_ERROR("Couldn't find register named '%s'", reg_params
[i
].reg_name
);
1724 if (r
->size
!= reg_params
[i
].size
) {
1725 LOG_ERROR("Register %s is %d bits instead of %d bits.",
1726 reg_params
[i
].reg_name
, r
->size
, reg_params
[i
].size
);
1730 if (r
->number
> GDB_REGNO_XPR31
) {
1731 LOG_ERROR("Only GPRs can be use as argument registers.");
1735 if (r
->type
->get(r
) != ERROR_OK
)
1737 saved_regs
[r
->number
] = buf_get_u64(r
->value
, 0, r
->size
);
1739 if (reg_params
[i
].direction
== PARAM_OUT
|| reg_params
[i
].direction
== PARAM_IN_OUT
) {
1740 if (r
->type
->set(r
, reg_params
[i
].value
) != ERROR_OK
)
1746 /* Disable Interrupts before attempting to run the algorithm. */
1747 uint64_t current_mstatus
;
1748 uint8_t mstatus_bytes
[8] = { 0 };
1750 LOG_DEBUG("Disabling Interrupts");
1751 struct reg
*reg_mstatus
= register_get_by_name(target
->reg_cache
,
1754 LOG_ERROR("Couldn't find mstatus!");
1758 reg_mstatus
->type
->get(reg_mstatus
);
1759 current_mstatus
= buf_get_u64(reg_mstatus
->value
, 0, reg_mstatus
->size
);
1760 uint64_t ie_mask
= MSTATUS_MIE
| MSTATUS_HIE
| MSTATUS_SIE
| MSTATUS_UIE
;
1761 buf_set_u64(mstatus_bytes
, 0, info
->xlen
[0], set_field(current_mstatus
,
1764 reg_mstatus
->type
->set(reg_mstatus
, mstatus_bytes
);
1767 LOG_DEBUG("resume at 0x%" TARGET_PRIxADDR
, entry_point
);
1768 if (riscv_resume(target
, 0, entry_point
, 0, 0, true) != ERROR_OK
)
1771 int64_t start
= timeval_ms();
1772 while (target
->state
!= TARGET_HALTED
) {
1773 LOG_DEBUG("poll()");
1774 int64_t now
= timeval_ms();
1775 if (now
- start
> timeout_ms
) {
1776 LOG_ERROR("Algorithm timed out after %" PRId64
" ms.", now
- start
);
1778 old_or_new_riscv_poll(target
);
1779 enum gdb_regno regnums
[] = {
1780 GDB_REGNO_RA
, GDB_REGNO_SP
, GDB_REGNO_GP
, GDB_REGNO_TP
,
1781 GDB_REGNO_T0
, GDB_REGNO_T1
, GDB_REGNO_T2
, GDB_REGNO_FP
,
1782 GDB_REGNO_S1
, GDB_REGNO_A0
, GDB_REGNO_A1
, GDB_REGNO_A2
,
1783 GDB_REGNO_A3
, GDB_REGNO_A4
, GDB_REGNO_A5
, GDB_REGNO_A6
,
1784 GDB_REGNO_A7
, GDB_REGNO_S2
, GDB_REGNO_S3
, GDB_REGNO_S4
,
1785 GDB_REGNO_S5
, GDB_REGNO_S6
, GDB_REGNO_S7
, GDB_REGNO_S8
,
1786 GDB_REGNO_S9
, GDB_REGNO_S10
, GDB_REGNO_S11
, GDB_REGNO_T3
,
1787 GDB_REGNO_T4
, GDB_REGNO_T5
, GDB_REGNO_T6
,
1789 GDB_REGNO_MSTATUS
, GDB_REGNO_MEPC
, GDB_REGNO_MCAUSE
,
1791 for (unsigned i
= 0; i
< DIM(regnums
); i
++) {
1792 enum gdb_regno regno
= regnums
[i
];
1793 riscv_reg_t reg_value
;
1794 if (riscv_get_register(target
, ®_value
, regno
) != ERROR_OK
)
1796 LOG_ERROR("%s = 0x%" PRIx64
, gdb_regno_name(regno
), reg_value
);
1798 return ERROR_TARGET_TIMEOUT
;
1801 int result
= old_or_new_riscv_poll(target
);
1802 if (result
!= ERROR_OK
)
1806 /* The current hart id might have been changed in poll(). */
1807 if (riscv_set_current_hartid(target
, hartid
) != ERROR_OK
)
1810 if (reg_pc
->type
->get(reg_pc
) != ERROR_OK
)
1812 uint64_t final_pc
= buf_get_u64(reg_pc
->value
, 0, reg_pc
->size
);
1813 if (exit_point
&& final_pc
!= exit_point
) {
1814 LOG_ERROR("PC ended up at 0x%" PRIx64
" instead of 0x%"
1815 TARGET_PRIxADDR
, final_pc
, exit_point
);
1819 /* Restore Interrupts */
1820 LOG_DEBUG("Restoring Interrupts");
1821 buf_set_u64(mstatus_bytes
, 0, info
->xlen
[0], current_mstatus
);
1822 reg_mstatus
->type
->set(reg_mstatus
, mstatus_bytes
);
1824 /* Restore registers */
1825 uint8_t buf
[8] = { 0 };
1826 buf_set_u64(buf
, 0, info
->xlen
[0], saved_pc
);
1827 if (reg_pc
->type
->set(reg_pc
, buf
) != ERROR_OK
)
1830 for (int i
= 0; i
< num_reg_params
; i
++) {
1831 if (reg_params
[i
].direction
== PARAM_IN
||
1832 reg_params
[i
].direction
== PARAM_IN_OUT
) {
1833 struct reg
*r
= register_get_by_name(target
->reg_cache
, reg_params
[i
].reg_name
, 0);
1834 if (r
->type
->get(r
) != ERROR_OK
) {
1835 LOG_ERROR("get(%s) failed", r
->name
);
1838 buf_cpy(r
->value
, reg_params
[i
].value
, reg_params
[i
].size
);
1840 LOG_DEBUG("restore %s", reg_params
[i
].reg_name
);
1841 struct reg
*r
= register_get_by_name(target
->reg_cache
, reg_params
[i
].reg_name
, 0);
1842 buf_set_u64(buf
, 0, info
->xlen
[0], saved_regs
[r
->number
]);
1843 if (r
->type
->set(r
, buf
) != ERROR_OK
) {
1844 LOG_ERROR("set(%s) failed", r
->name
);
1852 static int riscv_checksum_memory(struct target
*target
,
1853 target_addr_t address
, uint32_t count
,
1859 /*** OpenOCD Helper Functions ***/
1861 enum riscv_poll_hart
{
1863 RPH_DISCOVERED_HALTED
,
1864 RPH_DISCOVERED_RUNNING
,
1867 static enum riscv_poll_hart
riscv_poll_hart(struct target
*target
, int hartid
)
1870 if (riscv_set_current_hartid(target
, hartid
) != ERROR_OK
)
1873 LOG_DEBUG("polling hart %d, target->state=%d", hartid
, target
->state
);
1875 /* If OpenOCD thinks we're running but this hart is halted then it's time
1876 * to raise an event. */
1877 bool halted
= riscv_is_halted(target
);
1878 if (target
->state
!= TARGET_HALTED
&& halted
) {
1879 LOG_DEBUG(" triggered a halt");
1881 return RPH_DISCOVERED_HALTED
;
1882 } else if (target
->state
!= TARGET_RUNNING
&& !halted
) {
1883 LOG_DEBUG(" triggered running");
1884 target
->state
= TARGET_RUNNING
;
1885 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1886 return RPH_DISCOVERED_RUNNING
;
1889 return RPH_NO_CHANGE
;
1892 int set_debug_reason(struct target
*target
, enum riscv_halt_reason halt_reason
)
1894 switch (halt_reason
) {
1895 case RISCV_HALT_BREAKPOINT
:
1896 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1898 case RISCV_HALT_TRIGGER
:
1899 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
1901 case RISCV_HALT_INTERRUPT
:
1902 case RISCV_HALT_GROUP
:
1903 target
->debug_reason
= DBG_REASON_DBGRQ
;
1905 case RISCV_HALT_SINGLESTEP
:
1906 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1908 case RISCV_HALT_UNKNOWN
:
1909 target
->debug_reason
= DBG_REASON_UNDEFINED
;
1911 case RISCV_HALT_ERROR
:
1914 LOG_DEBUG("[%s] debug_reason=%d", target_name(target
), target
->debug_reason
);
1918 /*** OpenOCD Interface ***/
1919 int riscv_openocd_poll(struct target
*target
)
1921 LOG_DEBUG("polling all harts");
1922 int halted_hart
= -1;
1923 if (riscv_rtos_enabled(target
)) {
1924 /* Check every hart for an event. */
1925 for (int i
= 0; i
< riscv_count_harts(target
); ++i
) {
1926 enum riscv_poll_hart out
= riscv_poll_hart(target
, i
);
1929 case RPH_DISCOVERED_RUNNING
:
1931 case RPH_DISCOVERED_HALTED
:
1938 if (halted_hart
== -1) {
1939 LOG_DEBUG(" no harts just halted, target->state=%d", target
->state
);
1942 LOG_DEBUG(" hart %d halted", halted_hart
);
1944 target
->state
= TARGET_HALTED
;
1945 enum riscv_halt_reason halt_reason
= riscv_halt_reason(target
, halted_hart
);
1946 if (set_debug_reason(target
, halt_reason
) != ERROR_OK
)
1949 target
->rtos
->current_threadid
= halted_hart
+ 1;
1950 target
->rtos
->current_thread
= halted_hart
+ 1;
1951 riscv_set_rtos_hartid(target
, halted_hart
);
1953 /* If we're here then at least one hart triggered. That means we want
1954 * to go and halt _every_ hart (configured with -rtos riscv) in the
1955 * system, as that's the invariant we hold here. Some harts might have
1956 * already halted (as we're either in single-step mode or they also
1957 * triggered a breakpoint), so don't attempt to halt those harts.
1958 * riscv_halt() will do all that for us. */
1961 } else if (target
->smp
) {
1962 unsigned halts_discovered
= 0;
1963 unsigned total_targets
= 0;
1964 bool newly_halted
[RISCV_MAX_HARTS
] = {0};
1965 unsigned should_remain_halted
= 0;
1966 unsigned should_resume
= 0;
1968 for (struct target_list
*list
= target
->head
; list
!= NULL
;
1969 list
= list
->next
, i
++) {
1971 struct target
*t
= list
->target
;
1972 riscv_info_t
*r
= riscv_info(t
);
1973 assert(i
< DIM(newly_halted
));
1974 enum riscv_poll_hart out
= riscv_poll_hart(t
, r
->current_hartid
);
1978 case RPH_DISCOVERED_RUNNING
:
1979 t
->state
= TARGET_RUNNING
;
1980 t
->debug_reason
= DBG_REASON_NOTHALTED
;
1982 case RPH_DISCOVERED_HALTED
:
1984 newly_halted
[i
] = true;
1985 t
->state
= TARGET_HALTED
;
1986 enum riscv_halt_reason halt_reason
=
1987 riscv_halt_reason(t
, r
->current_hartid
);
1988 if (set_debug_reason(t
, halt_reason
) != ERROR_OK
)
1991 if (halt_reason
== RISCV_HALT_BREAKPOINT
) {
1993 switch (riscv_semihosting(t
, &retval
)) {
1996 /* This hart should remain halted. */
1997 should_remain_halted
++;
2000 /* This hart should be resumed, along with any other
2001 * harts that halted due to haltgroups. */
2007 } else if (halt_reason
!= RISCV_HALT_GROUP
) {
2008 should_remain_halted
++;
2017 LOG_DEBUG("should_remain_halted=%d, should_resume=%d",
2018 should_remain_halted
, should_resume
);
2019 if (should_remain_halted
&& should_resume
) {
2020 LOG_WARNING("%d harts should remain halted, and %d should resume.",
2021 should_remain_halted
, should_resume
);
2023 if (should_remain_halted
) {
2024 LOG_DEBUG("halt all");
2026 } else if (should_resume
) {
2027 LOG_DEBUG("resume all");
2028 riscv_resume(target
, true, 0, 0, 0, false);
2033 enum riscv_poll_hart out
= riscv_poll_hart(target
,
2034 riscv_current_hartid(target
));
2035 if (out
== RPH_NO_CHANGE
|| out
== RPH_DISCOVERED_RUNNING
)
2037 else if (out
== RPH_ERROR
)
2040 halted_hart
= riscv_current_hartid(target
);
2041 LOG_DEBUG(" hart %d halted", halted_hart
);
2043 enum riscv_halt_reason halt_reason
= riscv_halt_reason(target
, halted_hart
);
2044 if (set_debug_reason(target
, halt_reason
) != ERROR_OK
)
2046 target
->state
= TARGET_HALTED
;
2049 if (target
->debug_reason
== DBG_REASON_BREAKPOINT
) {
2051 switch (riscv_semihosting(target
, &retval
)) {
2054 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
2057 if (riscv_resume(target
, true, 0, 0, 0, false) != ERROR_OK
)
2064 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
2070 int riscv_openocd_step(struct target
*target
, int current
,
2071 target_addr_t address
, int handle_breakpoints
)
2073 LOG_DEBUG("stepping rtos hart");
2076 riscv_set_register(target
, GDB_REGNO_PC
, address
);
2078 riscv_reg_t trigger_state
[RISCV_MAX_HWBPS
] = {0};
2079 if (disable_triggers(target
, trigger_state
) != ERROR_OK
)
2082 int out
= riscv_step_rtos_hart(target
);
2083 if (out
!= ERROR_OK
) {
2084 LOG_ERROR("unable to step rtos hart");
2088 register_cache_invalidate(target
->reg_cache
);
2090 if (enable_triggers(target
, trigger_state
) != ERROR_OK
)
2093 target
->state
= TARGET_RUNNING
;
2094 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
2095 target
->state
= TARGET_HALTED
;
2096 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
2097 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
2101 /* Command Handlers */
2102 COMMAND_HANDLER(riscv_set_command_timeout_sec
)
2104 if (CMD_ARGC
!= 1) {
2105 LOG_ERROR("Command takes exactly 1 parameter");
2106 return ERROR_COMMAND_SYNTAX_ERROR
;
2108 int timeout
= atoi(CMD_ARGV
[0]);
2110 LOG_ERROR("%s is not a valid integer argument for command.", CMD_ARGV
[0]);
2114 riscv_command_timeout_sec
= timeout
;
2119 COMMAND_HANDLER(riscv_set_reset_timeout_sec
)
2121 if (CMD_ARGC
!= 1) {
2122 LOG_ERROR("Command takes exactly 1 parameter");
2123 return ERROR_COMMAND_SYNTAX_ERROR
;
2125 int timeout
= atoi(CMD_ARGV
[0]);
2127 LOG_ERROR("%s is not a valid integer argument for command.", CMD_ARGV
[0]);
2131 riscv_reset_timeout_sec
= timeout
;
2135 COMMAND_HANDLER(riscv_test_compliance
) {
2137 struct target
*target
= get_current_target(CMD_CTX
);
2142 LOG_ERROR("Command does not take any parameters.");
2143 return ERROR_COMMAND_SYNTAX_ERROR
;
2146 if (r
->test_compliance
) {
2147 return r
->test_compliance(target
);
2149 LOG_ERROR("This target does not support this command (may implement an older version of the spec).");
2154 COMMAND_HANDLER(riscv_set_prefer_sba
)
2156 if (CMD_ARGC
!= 1) {
2157 LOG_ERROR("Command takes exactly 1 parameter");
2158 return ERROR_COMMAND_SYNTAX_ERROR
;
2160 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_prefer_sba
);
2164 COMMAND_HANDLER(riscv_set_enable_virtual
)
2166 if (CMD_ARGC
!= 1) {
2167 LOG_ERROR("Command takes exactly 1 parameter");
2168 return ERROR_COMMAND_SYNTAX_ERROR
;
2170 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_enable_virtual
);
2174 void parse_error(const char *string
, char c
, unsigned position
)
2176 char buf
[position
+2];
2177 for (unsigned i
= 0; i
< position
; i
++)
2179 buf
[position
] = '^';
2180 buf
[position
+ 1] = 0;
2182 LOG_ERROR("Parse error at character %c in:", c
);
2183 LOG_ERROR("%s", string
);
2184 LOG_ERROR("%s", buf
);
2187 int parse_ranges(range_t
**ranges
, const char **argv
)
2189 for (unsigned pass
= 0; pass
< 2; pass
++) {
2192 bool parse_low
= true;
2194 for (unsigned i
= 0; i
== 0 || argv
[0][i
-1]; i
++) {
2195 char c
= argv
[0][i
];
2197 /* Ignore whitespace. */
2205 } else if (c
== '-') {
2207 } else if (c
== ',' || c
== 0) {
2209 (*ranges
)[range
].low
= low
;
2210 (*ranges
)[range
].high
= low
;
2215 parse_error(argv
[0], c
, i
);
2216 return ERROR_COMMAND_SYNTAX_ERROR
;
2223 } else if (c
== ',' || c
== 0) {
2226 (*ranges
)[range
].low
= low
;
2227 (*ranges
)[range
].high
= high
;
2233 parse_error(argv
[0], c
, i
);
2234 return ERROR_COMMAND_SYNTAX_ERROR
;
2241 *ranges
= calloc(range
+ 2, sizeof(range_t
));
2245 (*ranges
)[range
].low
= 1;
2246 (*ranges
)[range
].high
= 0;
2253 COMMAND_HANDLER(riscv_set_expose_csrs
)
2255 if (CMD_ARGC
!= 1) {
2256 LOG_ERROR("Command takes exactly 1 parameter");
2257 return ERROR_COMMAND_SYNTAX_ERROR
;
2260 return parse_ranges(&expose_csr
, CMD_ARGV
);
2263 COMMAND_HANDLER(riscv_set_expose_custom
)
2265 if (CMD_ARGC
!= 1) {
2266 LOG_ERROR("Command takes exactly 1 parameter");
2267 return ERROR_COMMAND_SYNTAX_ERROR
;
2270 return parse_ranges(&expose_custom
, CMD_ARGV
);
2273 COMMAND_HANDLER(riscv_authdata_read
)
2275 if (CMD_ARGC
!= 0) {
2276 LOG_ERROR("Command takes no parameters");
2277 return ERROR_COMMAND_SYNTAX_ERROR
;
2280 struct target
*target
= get_current_target(CMD_CTX
);
2282 LOG_ERROR("target is NULL!");
2288 LOG_ERROR("riscv_info is NULL!");
2292 if (r
->authdata_read
) {
2294 if (r
->authdata_read(target
, &value
) != ERROR_OK
)
2296 command_print(CMD
, "0x%" PRIx32
, value
);
2299 LOG_ERROR("authdata_read is not implemented for this target.");
2304 COMMAND_HANDLER(riscv_authdata_write
)
2306 if (CMD_ARGC
!= 1) {
2307 LOG_ERROR("Command takes exactly 1 argument");
2308 return ERROR_COMMAND_SYNTAX_ERROR
;
2311 struct target
*target
= get_current_target(CMD_CTX
);
2315 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], value
);
2317 if (r
->authdata_write
) {
2318 return r
->authdata_write(target
, value
);
2320 LOG_ERROR("authdata_write is not implemented for this target.");
2325 COMMAND_HANDLER(riscv_dmi_read
)
2327 if (CMD_ARGC
!= 1) {
2328 LOG_ERROR("Command takes 1 parameter");
2329 return ERROR_COMMAND_SYNTAX_ERROR
;
2332 struct target
*target
= get_current_target(CMD_CTX
);
2334 LOG_ERROR("target is NULL!");
2340 LOG_ERROR("riscv_info is NULL!");
2345 uint32_t address
, value
;
2346 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], address
);
2347 if (r
->dmi_read(target
, &value
, address
) != ERROR_OK
)
2349 command_print(CMD
, "0x%" PRIx32
, value
);
2352 LOG_ERROR("dmi_read is not implemented for this target.");
2358 COMMAND_HANDLER(riscv_dmi_write
)
2360 if (CMD_ARGC
!= 2) {
2361 LOG_ERROR("Command takes exactly 2 arguments");
2362 return ERROR_COMMAND_SYNTAX_ERROR
;
2365 struct target
*target
= get_current_target(CMD_CTX
);
2368 uint32_t address
, value
;
2369 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], address
);
2370 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
2373 return r
->dmi_write(target
, address
, value
);
2375 LOG_ERROR("dmi_write is not implemented for this target.");
2380 COMMAND_HANDLER(riscv_test_sba_config_reg
)
2382 if (CMD_ARGC
!= 4) {
2383 LOG_ERROR("Command takes exactly 4 arguments");
2384 return ERROR_COMMAND_SYNTAX_ERROR
;
2387 struct target
*target
= get_current_target(CMD_CTX
);
2390 target_addr_t legal_address
;
2392 target_addr_t illegal_address
;
2393 bool run_sbbusyerror_test
;
2395 COMMAND_PARSE_NUMBER(target_addr
, CMD_ARGV
[0], legal_address
);
2396 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], num_words
);
2397 COMMAND_PARSE_NUMBER(target_addr
, CMD_ARGV
[2], illegal_address
);
2398 COMMAND_PARSE_ON_OFF(CMD_ARGV
[3], run_sbbusyerror_test
);
2400 if (r
->test_sba_config_reg
) {
2401 return r
->test_sba_config_reg(target
, legal_address
, num_words
,
2402 illegal_address
, run_sbbusyerror_test
);
2404 LOG_ERROR("test_sba_config_reg is not implemented for this target.");
2409 COMMAND_HANDLER(riscv_reset_delays
)
2414 LOG_ERROR("Command takes at most one argument");
2415 return ERROR_COMMAND_SYNTAX_ERROR
;
2419 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], wait
);
2421 struct target
*target
= get_current_target(CMD_CTX
);
2423 r
->reset_delays_wait
= wait
;
2427 COMMAND_HANDLER(riscv_set_ir
)
2429 if (CMD_ARGC
!= 2) {
2430 LOG_ERROR("Command takes exactly 2 arguments");
2431 return ERROR_COMMAND_SYNTAX_ERROR
;
2435 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
2437 if (!strcmp(CMD_ARGV
[0], "idcode"))
2438 buf_set_u32(ir_idcode
, 0, 32, value
);
2439 else if (!strcmp(CMD_ARGV
[0], "dtmcs"))
2440 buf_set_u32(ir_dtmcontrol
, 0, 32, value
);
2441 else if (!strcmp(CMD_ARGV
[0], "dmi"))
2442 buf_set_u32(ir_dbus
, 0, 32, value
);
2449 COMMAND_HANDLER(riscv_resume_order
)
2452 LOG_ERROR("Command takes at most one argument");
2453 return ERROR_COMMAND_SYNTAX_ERROR
;
2456 if (!strcmp(CMD_ARGV
[0], "normal")) {
2457 resume_order
= RO_NORMAL
;
2458 } else if (!strcmp(CMD_ARGV
[0], "reversed")) {
2459 resume_order
= RO_REVERSED
;
2461 LOG_ERROR("Unsupported resume order: %s", CMD_ARGV
[0]);
2468 COMMAND_HANDLER(riscv_use_bscan_tunnel
)
2471 int tunnel_type
= BSCAN_TUNNEL_NESTED_TAP
;
2474 LOG_ERROR("Command takes at most two arguments");
2475 return ERROR_COMMAND_SYNTAX_ERROR
;
2476 } else if (CMD_ARGC
== 1) {
2477 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], irwidth
);
2478 } else if (CMD_ARGC
== 2) {
2479 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], irwidth
);
2480 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], tunnel_type
);
2482 if (tunnel_type
== BSCAN_TUNNEL_NESTED_TAP
)
2483 LOG_INFO("Nested Tap based Bscan Tunnel Selected");
2484 else if (tunnel_type
== BSCAN_TUNNEL_DATA_REGISTER
)
2485 LOG_INFO("Simple Register based Bscan Tunnel Selected");
2487 LOG_INFO("Invalid Tunnel type selected ! : selecting default Nested Tap Type");
2489 bscan_tunnel_type
= tunnel_type
;
2490 bscan_tunnel_ir_width
= irwidth
;
2494 COMMAND_HANDLER(riscv_set_enable_virt2phys
)
2496 if (CMD_ARGC
!= 1) {
2497 LOG_ERROR("Command takes exactly 1 parameter");
2498 return ERROR_COMMAND_SYNTAX_ERROR
;
2500 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_enable_virt2phys
);
2504 COMMAND_HANDLER(riscv_set_ebreakm
)
2506 if (CMD_ARGC
!= 1) {
2507 LOG_ERROR("Command takes exactly 1 parameter");
2508 return ERROR_COMMAND_SYNTAX_ERROR
;
2510 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_ebreakm
);
2514 COMMAND_HANDLER(riscv_set_ebreaks
)
2516 if (CMD_ARGC
!= 1) {
2517 LOG_ERROR("Command takes exactly 1 parameter");
2518 return ERROR_COMMAND_SYNTAX_ERROR
;
2520 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_ebreaks
);
2524 COMMAND_HANDLER(riscv_set_ebreaku
)
2526 if (CMD_ARGC
!= 1) {
2527 LOG_ERROR("Command takes exactly 1 parameter");
2528 return ERROR_COMMAND_SYNTAX_ERROR
;
2530 COMMAND_PARSE_ON_OFF(CMD_ARGV
[0], riscv_ebreaku
);
2534 static const struct command_registration riscv_exec_command_handlers
[] = {
2536 .name
= "test_compliance",
2537 .handler
= riscv_test_compliance
,
2539 .mode
= COMMAND_EXEC
,
2540 .help
= "Runs a basic compliance test suite against the RISC-V Debug Spec."
2543 .name
= "set_command_timeout_sec",
2544 .handler
= riscv_set_command_timeout_sec
,
2545 .mode
= COMMAND_ANY
,
2547 .help
= "Set the wall-clock timeout (in seconds) for individual commands"
2550 .name
= "set_reset_timeout_sec",
2551 .handler
= riscv_set_reset_timeout_sec
,
2552 .mode
= COMMAND_ANY
,
2554 .help
= "Set the wall-clock timeout (in seconds) after reset is deasserted"
2557 .name
= "set_prefer_sba",
2558 .handler
= riscv_set_prefer_sba
,
2559 .mode
= COMMAND_ANY
,
2561 .help
= "When on, prefer to use System Bus Access to access memory. "
2562 "When off (default), prefer to use the Program Buffer to access memory."
2565 .name
= "set_enable_virtual",
2566 .handler
= riscv_set_enable_virtual
,
2567 .mode
= COMMAND_ANY
,
2569 .help
= "When on, memory accesses are performed on physical or virtual "
2570 "memory depending on the current system configuration. "
2571 "When off (default), all memory accessses are performed on physical memory."
2574 .name
= "expose_csrs",
2575 .handler
= riscv_set_expose_csrs
,
2576 .mode
= COMMAND_ANY
,
2577 .usage
= "n0[-m0][,n1[-m1]]...",
2578 .help
= "Configure a list of inclusive ranges for CSRs to expose in "
2579 "addition to the standard ones. This must be executed before "
2583 .name
= "expose_custom",
2584 .handler
= riscv_set_expose_custom
,
2585 .mode
= COMMAND_ANY
,
2586 .usage
= "n0[-m0][,n1[-m1]]...",
2587 .help
= "Configure a list of inclusive ranges for custom registers to "
2588 "expose. custom0 is accessed as abstract register number 0xc000, "
2589 "etc. This must be executed before `init`."
2592 .name
= "authdata_read",
2593 .handler
= riscv_authdata_read
,
2595 .mode
= COMMAND_ANY
,
2596 .help
= "Return the 32-bit value read from authdata."
2599 .name
= "authdata_write",
2600 .handler
= riscv_authdata_write
,
2601 .mode
= COMMAND_ANY
,
2603 .help
= "Write the 32-bit value to authdata."
2607 .handler
= riscv_dmi_read
,
2608 .mode
= COMMAND_ANY
,
2610 .help
= "Perform a 32-bit DMI read at address, returning the value."
2613 .name
= "dmi_write",
2614 .handler
= riscv_dmi_write
,
2615 .mode
= COMMAND_ANY
,
2616 .usage
= "address value",
2617 .help
= "Perform a 32-bit DMI write of value at address."
2620 .name
= "test_sba_config_reg",
2621 .handler
= riscv_test_sba_config_reg
,
2622 .mode
= COMMAND_ANY
,
2623 .usage
= "legal_address num_words "
2624 "illegal_address run_sbbusyerror_test[on/off]",
2625 .help
= "Perform a series of tests on the SBCS register. "
2626 "Inputs are a legal, 128-byte aligned address and a number of words to "
2627 "read/write starting at that address (i.e., address range [legal address, "
2628 "legal_address+word_size*num_words) must be legally readable/writable), "
2629 "an illegal, 128-byte aligned address for error flag/handling cases, "
2630 "and whether sbbusyerror test should be run."
2633 .name
= "reset_delays",
2634 .handler
= riscv_reset_delays
,
2635 .mode
= COMMAND_ANY
,
2637 .help
= "OpenOCD learns how many Run-Test/Idle cycles are required "
2638 "between scans to avoid encountering the target being busy. This "
2639 "command resets those learned values after `wait` scans. It's only "
2640 "useful for testing OpenOCD itself."
2643 .name
= "resume_order",
2644 .handler
= riscv_resume_order
,
2645 .mode
= COMMAND_ANY
,
2646 .usage
= "normal|reversed",
2647 .help
= "Choose the order that harts are resumed in when `hasel` is not "
2648 "supported. Normal order is from lowest hart index to highest. "
2649 "Reversed order is from highest hart index to lowest."
2653 .handler
= riscv_set_ir
,
2654 .mode
= COMMAND_ANY
,
2655 .usage
= "[idcode|dtmcs|dmi] value",
2656 .help
= "Set IR value for specified JTAG register."
2659 .name
= "use_bscan_tunnel",
2660 .handler
= riscv_use_bscan_tunnel
,
2661 .mode
= COMMAND_ANY
,
2662 .usage
= "value [type]",
2663 .help
= "Enable or disable use of a BSCAN tunnel to reach DM. Supply "
2664 "the width of the DM transport TAP's instruction register to "
2665 "enable. Supply a value of 0 to disable. Pass A second argument "
2666 "(optional) to indicate Bscan Tunnel Type {0:(default) NESTED_TAP , "
2670 .name
= "set_enable_virt2phys",
2671 .handler
= riscv_set_enable_virt2phys
,
2672 .mode
= COMMAND_ANY
,
2674 .help
= "When on (default), enable translation from virtual address to "
2678 .name
= "set_ebreakm",
2679 .handler
= riscv_set_ebreakm
,
2680 .mode
= COMMAND_ANY
,
2682 .help
= "Control dcsr.ebreakm. When off, M-mode ebreak instructions "
2683 "don't trap to OpenOCD. Defaults to on."
2686 .name
= "set_ebreaks",
2687 .handler
= riscv_set_ebreaks
,
2688 .mode
= COMMAND_ANY
,
2690 .help
= "Control dcsr.ebreaks. When off, S-mode ebreak instructions "
2691 "don't trap to OpenOCD. Defaults to on."
2694 .name
= "set_ebreaku",
2695 .handler
= riscv_set_ebreaku
,
2696 .mode
= COMMAND_ANY
,
2698 .help
= "Control dcsr.ebreaku. When off, U-mode ebreak instructions "
2699 "don't trap to OpenOCD. Defaults to on."
2701 COMMAND_REGISTRATION_DONE
2705 * To be noted that RISC-V targets use the same semihosting commands as
2708 * The main reason is compatibility with existing tools. For example the
2709 * Eclipse OpenOCD/SEGGER J-Link/QEMU plug-ins have several widgets to
2710 * configure semihosting, which generate commands like `arm semihosting
2712 * A secondary reason is the fact that the protocol used is exactly the
2713 * one specified by ARM. If RISC-V will ever define its own semihosting
2714 * protocol, then a command like `riscv semihosting enable` will make
2715 * sense, but for now all semihosting commands are prefixed with `arm`.
2717 extern const struct command_registration semihosting_common_handlers
[];
2719 const struct command_registration riscv_command_handlers
[] = {
2722 .mode
= COMMAND_ANY
,
2723 .help
= "RISC-V Command Group",
2725 .chain
= riscv_exec_command_handlers
2729 .mode
= COMMAND_ANY
,
2730 .help
= "ARM Command Group",
2732 .chain
= semihosting_common_handlers
2734 COMMAND_REGISTRATION_DONE
2737 static unsigned riscv_xlen_nonconst(struct target
*target
)
2739 return riscv_xlen(target
);
2742 struct target_type riscv_target
= {
2745 .init_target
= riscv_init_target
,
2746 .deinit_target
= riscv_deinit_target
,
2747 .examine
= riscv_examine
,
2749 /* poll current target status */
2750 .poll
= old_or_new_riscv_poll
,
2753 .resume
= riscv_target_resume
,
2754 .step
= old_or_new_riscv_step
,
2756 .assert_reset
= riscv_assert_reset
,
2757 .deassert_reset
= riscv_deassert_reset
,
2759 .read_memory
= riscv_read_memory
,
2760 .write_memory
= riscv_write_memory
,
2761 .read_phys_memory
= riscv_read_phys_memory
,
2762 .write_phys_memory
= riscv_write_phys_memory
,
2764 .checksum_memory
= riscv_checksum_memory
,
2767 .virt2phys
= riscv_virt2phys
,
2769 .get_gdb_reg_list
= riscv_get_gdb_reg_list
,
2770 .get_gdb_reg_list_noread
= riscv_get_gdb_reg_list_noread
,
2772 .add_breakpoint
= riscv_add_breakpoint
,
2773 .remove_breakpoint
= riscv_remove_breakpoint
,
2775 .add_watchpoint
= riscv_add_watchpoint
,
2776 .remove_watchpoint
= riscv_remove_watchpoint
,
2777 .hit_watchpoint
= riscv_hit_watchpoint
,
2779 .arch_state
= riscv_arch_state
,
2781 .run_algorithm
= riscv_run_algorithm
,
2783 .commands
= riscv_command_handlers
,
2785 .address_bits
= riscv_xlen_nonconst
,
2788 /*** RISC-V Interface ***/
2790 void riscv_info_init(struct target
*target
, riscv_info_t
*r
)
2792 memset(r
, 0, sizeof(*r
));
2794 r
->registers_initialized
= false;
2795 r
->current_hartid
= target
->coreid
;
2797 memset(r
->trigger_unique_id
, 0xff, sizeof(r
->trigger_unique_id
));
2799 for (size_t h
= 0; h
< RISCV_MAX_HARTS
; ++h
)
2803 static int riscv_resume_go_all_harts(struct target
*target
)
2807 /* Dummy variables to make mingw32-gcc happy. */
2811 switch (resume_order
) {
2814 last
= riscv_count_harts(target
) - 1;
2818 first
= riscv_count_harts(target
) - 1;
2826 for (int i
= first
; i
!= last
+ step
; i
+= step
) {
2827 if (!riscv_hart_enabled(target
, i
))
2830 LOG_DEBUG("resuming hart %d", i
);
2831 if (riscv_set_current_hartid(target
, i
) != ERROR_OK
)
2833 if (riscv_is_halted(target
)) {
2834 if (r
->resume_go(target
) != ERROR_OK
)
2837 LOG_DEBUG(" hart %d requested resume, but was already resumed", i
);
2841 riscv_invalidate_register_cache(target
);
2845 int riscv_step_rtos_hart(struct target
*target
)
2848 int hartid
= r
->current_hartid
;
2849 if (riscv_rtos_enabled(target
)) {
2850 hartid
= r
->rtos_hartid
;
2852 LOG_DEBUG("GDB has asked me to step \"any\" thread, so I'm stepping hart 0.");
2856 if (riscv_set_current_hartid(target
, hartid
) != ERROR_OK
)
2858 LOG_DEBUG("stepping hart %d", hartid
);
2860 if (!riscv_is_halted(target
)) {
2861 LOG_ERROR("Hart isn't halted before single step!");
2864 riscv_invalidate_register_cache(target
);
2866 if (r
->step_current_hart(target
) != ERROR_OK
)
2868 riscv_invalidate_register_cache(target
);
2870 if (!riscv_is_halted(target
)) {
2871 LOG_ERROR("Hart was not halted after single step!");
2877 bool riscv_supports_extension(struct target
*target
, int hartid
, char letter
)
2881 if (letter
>= 'a' && letter
<= 'z')
2883 else if (letter
>= 'A' && letter
<= 'Z')
2887 return r
->misa
[hartid
] & (1 << num
);
2890 unsigned riscv_xlen(const struct target
*target
)
2892 return riscv_xlen_of_hart(target
, riscv_current_hartid(target
));
2895 int riscv_xlen_of_hart(const struct target
*target
, int hartid
)
2898 assert(r
->xlen
[hartid
] != -1);
2899 return r
->xlen
[hartid
];
2902 bool riscv_rtos_enabled(const struct target
*target
)
2907 int riscv_set_current_hartid(struct target
*target
, int hartid
)
2910 if (!r
->select_current_hart
)
2913 int previous_hartid
= riscv_current_hartid(target
);
2914 r
->current_hartid
= hartid
;
2915 assert(riscv_hart_enabled(target
, hartid
));
2916 LOG_DEBUG("setting hartid to %d, was %d", hartid
, previous_hartid
);
2917 if (r
->select_current_hart(target
) != ERROR_OK
)
2920 /* This might get called during init, in which case we shouldn't be
2921 * setting up the register cache. */
2922 if (target_was_examined(target
) && riscv_rtos_enabled(target
))
2923 riscv_invalidate_register_cache(target
);
2928 void riscv_invalidate_register_cache(struct target
*target
)
2932 LOG_DEBUG("[%d]", target
->coreid
);
2933 register_cache_invalidate(target
->reg_cache
);
2934 for (size_t i
= 0; i
< target
->reg_cache
->num_regs
; ++i
) {
2935 struct reg
*reg
= &target
->reg_cache
->reg_list
[i
];
2939 r
->registers_initialized
= true;
2942 int riscv_current_hartid(const struct target
*target
)
2945 return r
->current_hartid
;
2948 void riscv_set_all_rtos_harts(struct target
*target
)
2951 r
->rtos_hartid
= -1;
2954 void riscv_set_rtos_hartid(struct target
*target
, int hartid
)
2956 LOG_DEBUG("setting RTOS hartid %d", hartid
);
2958 r
->rtos_hartid
= hartid
;
2961 int riscv_count_harts(struct target
*target
)
2966 if (r
== NULL
|| r
->hart_count
== NULL
)
2968 return r
->hart_count(target
);
2971 bool riscv_has_register(struct target
*target
, int hartid
, int regid
)
2978 * return true iff we are guaranteed that the register will contain exactly
2979 * the value we just wrote when it's read.
2980 * If write is false:
2981 * return true iff we are guaranteed that the register will read the same
2982 * value in the future as the value we just read.
2984 static bool gdb_regno_cacheable(enum gdb_regno regno
, bool write
)
2986 /* GPRs, FPRs, vector registers are just normal data stores. */
2987 if (regno
<= GDB_REGNO_XPR31
||
2988 (regno
>= GDB_REGNO_FPR0
&& regno
<= GDB_REGNO_FPR31
) ||
2989 (regno
>= GDB_REGNO_V0
&& regno
<= GDB_REGNO_V31
))
2992 /* Most CSRs won't change value on us, but we can't assume it about rbitrary
2998 case GDB_REGNO_VSTART
:
2999 case GDB_REGNO_VXSAT
:
3000 case GDB_REGNO_VXRM
:
3001 case GDB_REGNO_VLENB
:
3003 case GDB_REGNO_VTYPE
:
3004 case GDB_REGNO_MISA
:
3005 case GDB_REGNO_DCSR
:
3006 case GDB_REGNO_DSCRATCH0
:
3007 case GDB_REGNO_MSTATUS
:
3008 case GDB_REGNO_MEPC
:
3009 case GDB_REGNO_MCAUSE
:
3010 case GDB_REGNO_SATP
:
3012 * WARL registers might not contain the value we just wrote, but
3013 * these ones won't spontaneously change their value either. *
3017 case GDB_REGNO_TSELECT
: /* I think this should be above, but then it doesn't work. */
3018 case GDB_REGNO_TDATA1
: /* Changes value when tselect is changed. */
3019 case GDB_REGNO_TDATA2
: /* Changse value when tselect is changed. */
3026 * This function is called when the debug user wants to change the value of a
3027 * register. The new value may be cached, and may not be written until the hart
3029 int riscv_set_register(struct target
*target
, enum gdb_regno r
, riscv_reg_t v
)
3031 return riscv_set_register_on_hart(target
, riscv_current_hartid(target
), r
, v
);
3034 int riscv_set_register_on_hart(struct target
*target
, int hartid
,
3035 enum gdb_regno regid
, uint64_t value
)
3038 LOG_DEBUG("{%d} %s <- %" PRIx64
, hartid
, gdb_regno_name(regid
), value
);
3039 assert(r
->set_register
);
3041 /* TODO: Hack to deal with gdb that thinks these registers still exist. */
3042 if (regid
> GDB_REGNO_XPR15
&& regid
<= GDB_REGNO_XPR31
&& value
== 0 &&
3043 riscv_supports_extension(target
, hartid
, 'E'))
3046 struct reg
*reg
= &target
->reg_cache
->reg_list
[regid
];
3047 buf_set_u64(reg
->value
, 0, reg
->size
, value
);
3049 int result
= r
->set_register(target
, hartid
, regid
, value
);
3050 if (result
== ERROR_OK
)
3051 reg
->valid
= gdb_regno_cacheable(regid
, true);
3054 LOG_DEBUG("[%s]{%d} wrote 0x%" PRIx64
" to %s valid=%d",
3055 target_name(target
), hartid
, value
, reg
->name
, reg
->valid
);
3059 int riscv_get_register(struct target
*target
, riscv_reg_t
*value
,
3062 return riscv_get_register_on_hart(target
, value
,
3063 riscv_current_hartid(target
), r
);
3066 int riscv_get_register_on_hart(struct target
*target
, riscv_reg_t
*value
,
3067 int hartid
, enum gdb_regno regid
)
3071 struct reg
*reg
= &target
->reg_cache
->reg_list
[regid
];
3073 LOG_DEBUG("[%s]{%d} %s does not exist.",
3074 target_name(target
), hartid
, gdb_regno_name(regid
));
3078 if (reg
&& reg
->valid
&& hartid
== riscv_current_hartid(target
)) {
3079 *value
= buf_get_u64(reg
->value
, 0, reg
->size
);
3080 LOG_DEBUG("{%d} %s: %" PRIx64
" (cached)", hartid
,
3081 gdb_regno_name(regid
), *value
);
3085 /* TODO: Hack to deal with gdb that thinks these registers still exist. */
3086 if (regid
> GDB_REGNO_XPR15
&& regid
<= GDB_REGNO_XPR31
&&
3087 riscv_supports_extension(target
, hartid
, 'E')) {
3092 int result
= r
->get_register(target
, value
, hartid
, regid
);
3094 if (result
== ERROR_OK
)
3095 reg
->valid
= gdb_regno_cacheable(regid
, false);
3097 LOG_DEBUG("{%d} %s: %" PRIx64
, hartid
, gdb_regno_name(regid
), *value
);
3101 bool riscv_is_halted(struct target
*target
)
3104 assert(r
->is_halted
);
3105 return r
->is_halted(target
);
3108 enum riscv_halt_reason
riscv_halt_reason(struct target
*target
, int hartid
)
3111 if (riscv_set_current_hartid(target
, hartid
) != ERROR_OK
)
3112 return RISCV_HALT_ERROR
;
3113 if (!riscv_is_halted(target
)) {
3114 LOG_ERROR("Hart is not halted!");
3115 return RISCV_HALT_UNKNOWN
;
3117 return r
->halt_reason(target
);
3120 size_t riscv_debug_buffer_size(struct target
*target
)
3123 return r
->debug_buffer_size
[riscv_current_hartid(target
)];
3126 int riscv_write_debug_buffer(struct target
*target
, int index
, riscv_insn_t insn
)
3129 r
->write_debug_buffer(target
, index
, insn
);
3133 riscv_insn_t
riscv_read_debug_buffer(struct target
*target
, int index
)
3136 return r
->read_debug_buffer(target
, index
);
3139 int riscv_execute_debug_buffer(struct target
*target
)
3142 return r
->execute_debug_buffer(target
);
3145 void riscv_fill_dmi_write_u64(struct target
*target
, char *buf
, int a
, uint64_t d
)
3148 r
->fill_dmi_write_u64(target
, buf
, a
, d
);
3151 void riscv_fill_dmi_read_u64(struct target
*target
, char *buf
, int a
)
3154 r
->fill_dmi_read_u64(target
, buf
, a
);
3157 void riscv_fill_dmi_nop_u64(struct target
*target
, char *buf
)
3160 r
->fill_dmi_nop_u64(target
, buf
);
3163 int riscv_dmi_write_u64_bits(struct target
*target
)
3166 return r
->dmi_write_u64_bits(target
);
3169 bool riscv_hart_enabled(struct target
*target
, int hartid
)
3171 /* FIXME: Add a hart mask to the RTOS. */
3172 if (riscv_rtos_enabled(target
))
3173 return hartid
< riscv_count_harts(target
);
3175 return hartid
== target
->coreid
;
3179 * Count triggers, and initialize trigger_count for each hart.
3180 * trigger_count is initialized even if this function fails to discover
3182 * Disable any hardware triggers that have dmode set. We can't have set them
3183 * ourselves. Maybe they're left over from some killed debug session.
3185 int riscv_enumerate_triggers(struct target
*target
)
3189 if (r
->triggers_enumerated
)
3192 r
->triggers_enumerated
= true; /* At the very least we tried. */
3194 for (int hartid
= 0; hartid
< riscv_count_harts(target
); ++hartid
) {
3195 if (!riscv_hart_enabled(target
, hartid
))
3198 riscv_reg_t tselect
;
3199 int result
= riscv_get_register_on_hart(target
, &tselect
, hartid
,
3201 if (result
!= ERROR_OK
)
3204 for (unsigned t
= 0; t
< RISCV_MAX_TRIGGERS
; ++t
) {
3205 r
->trigger_count
[hartid
] = t
;
3207 /* If we can't write tselect, then this hart does not support triggers. */
3208 if (riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
, t
) != ERROR_OK
)
3210 uint64_t tselect_rb
;
3211 result
= riscv_get_register_on_hart(target
, &tselect_rb
, hartid
,
3213 if (result
!= ERROR_OK
)
3215 /* Mask off the top bit, which is used as tdrmode in old
3216 * implementations. */
3217 tselect_rb
&= ~(1ULL << (riscv_xlen(target
)-1));
3218 if (tselect_rb
!= t
)
3221 result
= riscv_get_register_on_hart(target
, &tdata1
, hartid
,
3223 if (result
!= ERROR_OK
)
3226 int type
= get_field(tdata1
, MCONTROL_TYPE(riscv_xlen(target
)));
3231 /* On these older cores we don't support software using
3233 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, 0);
3236 if (tdata1
& MCONTROL_DMODE(riscv_xlen(target
)))
3237 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TDATA1
, 0);
3242 riscv_set_register_on_hart(target
, hartid
, GDB_REGNO_TSELECT
, tselect
);
3244 LOG_INFO("[%d] Found %d triggers", hartid
, r
->trigger_count
[hartid
]);
3250 const char *gdb_regno_name(enum gdb_regno regno
)
3252 static char buf
[32];
3255 case GDB_REGNO_ZERO
:
3321 case GDB_REGNO_FPR0
:
3323 case GDB_REGNO_FPR31
:
3325 case GDB_REGNO_CSR0
:
3327 case GDB_REGNO_TSELECT
:
3329 case GDB_REGNO_TDATA1
:
3331 case GDB_REGNO_TDATA2
:
3333 case GDB_REGNO_MISA
:
3337 case GDB_REGNO_DCSR
:
3339 case GDB_REGNO_DSCRATCH0
:
3341 case GDB_REGNO_MSTATUS
:
3343 case GDB_REGNO_MEPC
:
3345 case GDB_REGNO_MCAUSE
:
3347 case GDB_REGNO_PRIV
:
3349 case GDB_REGNO_SATP
:
3351 case GDB_REGNO_VTYPE
:
3420 if (regno
<= GDB_REGNO_XPR31
)
3421 sprintf(buf
, "x%d", regno
- GDB_REGNO_ZERO
);
3422 else if (regno
>= GDB_REGNO_CSR0
&& regno
<= GDB_REGNO_CSR4095
)
3423 sprintf(buf
, "csr%d", regno
- GDB_REGNO_CSR0
);
3424 else if (regno
>= GDB_REGNO_FPR0
&& regno
<= GDB_REGNO_FPR31
)
3425 sprintf(buf
, "f%d", regno
- GDB_REGNO_FPR0
);
3427 sprintf(buf
, "gdb_regno_%d", regno
);
3432 static int register_get(struct reg
*reg
)
3434 riscv_reg_info_t
*reg_info
= reg
->arch_info
;
3435 struct target
*target
= reg_info
->target
;
3438 if (reg
->number
>= GDB_REGNO_V0
&& reg
->number
<= GDB_REGNO_V31
) {
3439 if (!r
->get_register_buf
) {
3440 LOG_ERROR("Reading register %s not supported on this RISC-V target.",
3441 gdb_regno_name(reg
->number
));
3445 if (r
->get_register_buf(target
, reg
->value
, reg
->number
) != ERROR_OK
)
3449 int result
= riscv_get_register(target
, &value
, reg
->number
);
3450 if (result
!= ERROR_OK
)
3452 buf_set_u64(reg
->value
, 0, reg
->size
, value
);
3454 reg
->valid
= gdb_regno_cacheable(reg
->number
, false);
3455 char *str
= buf_to_hex_str(reg
->value
, reg
->size
);
3456 LOG_DEBUG("[%d]{%d} read 0x%s from %s (valid=%d)", target
->coreid
,
3457 riscv_current_hartid(target
), str
, reg
->name
, reg
->valid
);
3462 static int register_set(struct reg
*reg
, uint8_t *buf
)
3464 riscv_reg_info_t
*reg_info
= reg
->arch_info
;
3465 struct target
*target
= reg_info
->target
;
3468 char *str
= buf_to_hex_str(buf
, reg
->size
);
3469 LOG_DEBUG("[%d]{%d} write 0x%s to %s (valid=%d)", target
->coreid
,
3470 riscv_current_hartid(target
), str
, reg
->name
, reg
->valid
);
3473 memcpy(reg
->value
, buf
, DIV_ROUND_UP(reg
->size
, 8));
3474 reg
->valid
= gdb_regno_cacheable(reg
->number
, true);
3476 if (reg
->number
== GDB_REGNO_TDATA1
||
3477 reg
->number
== GDB_REGNO_TDATA2
) {
3478 r
->manual_hwbp_set
= true;
3479 /* When enumerating triggers, we clear any triggers with DMODE set,
3480 * assuming they were left over from a previous debug session. So make
3481 * sure that is done before a user might be setting their own triggers.
3483 if (riscv_enumerate_triggers(target
) != ERROR_OK
)
3487 if (reg
->number
>= GDB_REGNO_V0
&& reg
->number
<= GDB_REGNO_V31
) {
3488 if (!r
->set_register_buf
) {
3489 LOG_ERROR("Writing register %s not supported on this RISC-V target.",
3490 gdb_regno_name(reg
->number
));
3494 if (r
->set_register_buf(target
, reg
->number
, reg
->value
) != ERROR_OK
)
3497 uint64_t value
= buf_get_u64(buf
, 0, reg
->size
);
3498 if (riscv_set_register(target
, reg
->number
, value
) != ERROR_OK
)
3505 static struct reg_arch_type riscv_reg_arch_type
= {
3506 .get
= register_get
,
3515 static int cmp_csr_info(const void *p1
, const void *p2
)
3517 return (int) (((struct csr_info
*)p1
)->number
) - (int) (((struct csr_info
*)p2
)->number
);
3520 int riscv_init_registers(struct target
*target
)
3524 riscv_free_registers(target
);
3526 target
->reg_cache
= calloc(1, sizeof(*target
->reg_cache
));
3527 if (!target
->reg_cache
)
3529 target
->reg_cache
->name
= "RISC-V Registers";
3530 target
->reg_cache
->num_regs
= GDB_REGNO_COUNT
;
3532 if (expose_custom
) {
3533 for (unsigned i
= 0; expose_custom
[i
].low
<= expose_custom
[i
].high
; i
++) {
3534 for (unsigned number
= expose_custom
[i
].low
;
3535 number
<= expose_custom
[i
].high
;
3537 target
->reg_cache
->num_regs
++;
3541 LOG_DEBUG("create register cache for %d registers",
3542 target
->reg_cache
->num_regs
);
3544 target
->reg_cache
->reg_list
=
3545 calloc(target
->reg_cache
->num_regs
, sizeof(struct reg
));
3546 if (!target
->reg_cache
->reg_list
)
3549 const unsigned int max_reg_name_len
= 12;
3550 free(info
->reg_names
);
3552 calloc(target
->reg_cache
->num_regs
, max_reg_name_len
);
3553 if (!info
->reg_names
)
3555 char *reg_name
= info
->reg_names
;
3557 int hartid
= riscv_current_hartid(target
);
3559 static struct reg_feature feature_cpu
= {
3560 .name
= "org.gnu.gdb.riscv.cpu"
3562 static struct reg_feature feature_fpu
= {
3563 .name
= "org.gnu.gdb.riscv.fpu"
3565 static struct reg_feature feature_csr
= {
3566 .name
= "org.gnu.gdb.riscv.csr"
3568 static struct reg_feature feature_vector
= {
3569 .name
= "org.gnu.gdb.riscv.vector"
3571 static struct reg_feature feature_virtual
= {
3572 .name
= "org.gnu.gdb.riscv.virtual"
3574 static struct reg_feature feature_custom
= {
3575 .name
= "org.gnu.gdb.riscv.custom"
3578 /* These types are built into gdb. */
3579 static struct reg_data_type type_ieee_single
= { .type
= REG_TYPE_IEEE_SINGLE
, .id
= "ieee_single" };
3580 static struct reg_data_type type_ieee_double
= { .type
= REG_TYPE_IEEE_DOUBLE
, .id
= "ieee_double" };
3581 static struct reg_data_type_union_field single_double_fields
[] = {
3582 {"float", &type_ieee_single
, single_double_fields
+ 1},
3583 {"double", &type_ieee_double
, NULL
},
3585 static struct reg_data_type_union single_double_union
= {
3586 .fields
= single_double_fields
3588 static struct reg_data_type type_ieee_single_double
= {
3589 .type
= REG_TYPE_ARCH_DEFINED
,
3591 .type_class
= REG_TYPE_CLASS_UNION
,
3592 .reg_type_union
= &single_double_union
3594 static struct reg_data_type type_uint8
= { .type
= REG_TYPE_UINT8
, .id
= "uint8" };
3595 static struct reg_data_type type_uint16
= { .type
= REG_TYPE_UINT16
, .id
= "uint16" };
3596 static struct reg_data_type type_uint32
= { .type
= REG_TYPE_UINT32
, .id
= "uint32" };
3597 static struct reg_data_type type_uint64
= { .type
= REG_TYPE_UINT64
, .id
= "uint64" };
3598 static struct reg_data_type type_uint128
= { .type
= REG_TYPE_UINT128
, .id
= "uint128" };
3600 /* This is roughly the XML we want:
3601 * <vector id="bytes" type="uint8" count="16"/>
3602 * <vector id="shorts" type="uint16" count="8"/>
3603 * <vector id="words" type="uint32" count="4"/>
3604 * <vector id="longs" type="uint64" count="2"/>
3605 * <vector id="quads" type="uint128" count="1"/>
3606 * <union id="riscv_vector_type">
3607 * <field name="b" type="bytes"/>
3608 * <field name="s" type="shorts"/>
3609 * <field name="w" type="words"/>
3610 * <field name="l" type="longs"/>
3611 * <field name="q" type="quads"/>
3615 info
->vector_uint8
.type
= &type_uint8
;
3616 info
->vector_uint8
.count
= info
->vlenb
[hartid
];
3617 info
->type_uint8_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3618 info
->type_uint8_vector
.id
= "bytes";
3619 info
->type_uint8_vector
.type_class
= REG_TYPE_CLASS_VECTOR
;
3620 info
->type_uint8_vector
.reg_type_vector
= &info
->vector_uint8
;
3622 info
->vector_uint16
.type
= &type_uint16
;
3623 info
->vector_uint16
.count
= info
->vlenb
[hartid
] / 2;
3624 info
->type_uint16_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3625 info
->type_uint16_vector
.id
= "shorts";
3626 info
->type_uint16_vector
.type_class
= REG_TYPE_CLASS_VECTOR
;
3627 info
->type_uint16_vector
.reg_type_vector
= &info
->vector_uint16
;
3629 info
->vector_uint32
.type
= &type_uint32
;
3630 info
->vector_uint32
.count
= info
->vlenb
[hartid
] / 4;
3631 info
->type_uint32_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3632 info
->type_uint32_vector
.id
= "words";
3633 info
->type_uint32_vector
.type_class
= REG_TYPE_CLASS_VECTOR
;
3634 info
->type_uint32_vector
.reg_type_vector
= &info
->vector_uint32
;
3636 info
->vector_uint64
.type
= &type_uint64
;
3637 info
->vector_uint64
.count
= info
->vlenb
[hartid
] / 8;
3638 info
->type_uint64_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3639 info
->type_uint64_vector
.id
= "longs";
3640 info
->type_uint64_vector
.type_class
= REG_TYPE_CLASS_VECTOR
;
3641 info
->type_uint64_vector
.reg_type_vector
= &info
->vector_uint64
;
3643 info
->vector_uint128
.type
= &type_uint128
;
3644 info
->vector_uint128
.count
= info
->vlenb
[hartid
] / 16;
3645 info
->type_uint128_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3646 info
->type_uint128_vector
.id
= "quads";
3647 info
->type_uint128_vector
.type_class
= REG_TYPE_CLASS_VECTOR
;
3648 info
->type_uint128_vector
.reg_type_vector
= &info
->vector_uint128
;
3650 info
->vector_fields
[0].name
= "b";
3651 info
->vector_fields
[0].type
= &info
->type_uint8_vector
;
3652 if (info
->vlenb
[hartid
] >= 2) {
3653 info
->vector_fields
[0].next
= info
->vector_fields
+ 1;
3654 info
->vector_fields
[1].name
= "s";
3655 info
->vector_fields
[1].type
= &info
->type_uint16_vector
;
3657 info
->vector_fields
[0].next
= NULL
;
3659 if (info
->vlenb
[hartid
] >= 4) {
3660 info
->vector_fields
[1].next
= info
->vector_fields
+ 2;
3661 info
->vector_fields
[2].name
= "w";
3662 info
->vector_fields
[2].type
= &info
->type_uint32_vector
;
3664 info
->vector_fields
[1].next
= NULL
;
3666 if (info
->vlenb
[hartid
] >= 8) {
3667 info
->vector_fields
[2].next
= info
->vector_fields
+ 3;
3668 info
->vector_fields
[3].name
= "l";
3669 info
->vector_fields
[3].type
= &info
->type_uint64_vector
;
3671 info
->vector_fields
[2].next
= NULL
;
3673 if (info
->vlenb
[hartid
] >= 16) {
3674 info
->vector_fields
[3].next
= info
->vector_fields
+ 4;
3675 info
->vector_fields
[4].name
= "q";
3676 info
->vector_fields
[4].type
= &info
->type_uint128_vector
;
3678 info
->vector_fields
[3].next
= NULL
;
3680 info
->vector_fields
[4].next
= NULL
;
3682 info
->vector_union
.fields
= info
->vector_fields
;
3684 info
->type_vector
.type
= REG_TYPE_ARCH_DEFINED
;
3685 info
->type_vector
.id
= "riscv_vector";
3686 info
->type_vector
.type_class
= REG_TYPE_CLASS_UNION
;
3687 info
->type_vector
.reg_type_union
= &info
->vector_union
;
3689 struct csr_info csr_info
[] = {
3690 #define DECLARE_CSR(name, number) { number, #name },
3691 #include "encoding.h"
3694 /* encoding.h does not contain the registers in sorted order. */
3695 qsort(csr_info
, DIM(csr_info
), sizeof(*csr_info
), cmp_csr_info
);
3696 unsigned csr_info_index
= 0;
3698 unsigned custom_range_index
= 0;
3699 int custom_within_range
= 0;
3701 riscv_reg_info_t
*shared_reg_info
= calloc(1, sizeof(riscv_reg_info_t
));
3702 if (!shared_reg_info
)
3704 shared_reg_info
->target
= target
;
3706 /* When gdb requests register N, gdb_get_register_packet() assumes that this
3707 * is register at index N in reg_list. So if there are certain registers
3708 * that don't exist, we need to leave holes in the list (or renumber, but
3709 * it would be nice not to have yet another set of numbers to translate
3711 for (uint32_t number
= 0; number
< target
->reg_cache
->num_regs
; number
++) {
3712 struct reg
*r
= &target
->reg_cache
->reg_list
[number
];
3716 r
->type
= &riscv_reg_arch_type
;
3717 r
->arch_info
= shared_reg_info
;
3719 r
->size
= riscv_xlen(target
);
3720 /* r->size is set in riscv_invalidate_register_cache, maybe because the
3721 * target is in theory allowed to change XLEN on us. But I expect a lot
3722 * of other things to break in that case as well. */
3723 if (number
<= GDB_REGNO_XPR31
) {
3724 r
->exist
= number
<= GDB_REGNO_XPR15
||
3725 !riscv_supports_extension(target
, hartid
, 'E');
3726 /* TODO: For now we fake that all GPRs exist because otherwise gdb
3729 r
->caller_save
= true;
3731 case GDB_REGNO_ZERO
:
3828 r
->group
= "general";
3829 r
->feature
= &feature_cpu
;
3830 } else if (number
== GDB_REGNO_PC
) {
3831 r
->caller_save
= true;
3832 sprintf(reg_name
, "pc");
3833 r
->group
= "general";
3834 r
->feature
= &feature_cpu
;
3835 } else if (number
>= GDB_REGNO_FPR0
&& number
<= GDB_REGNO_FPR31
) {
3836 r
->caller_save
= true;
3837 if (riscv_supports_extension(target
, hartid
, 'D')) {
3839 if (riscv_supports_extension(target
, hartid
, 'F'))
3840 r
->reg_data_type
= &type_ieee_single_double
;
3842 r
->reg_data_type
= &type_ieee_double
;
3843 } else if (riscv_supports_extension(target
, hartid
, 'F')) {
3844 r
->reg_data_type
= &type_ieee_single
;
3928 case GDB_REGNO_FS10
:
3931 case GDB_REGNO_FS11
:
3940 case GDB_REGNO_FT10
:
3943 case GDB_REGNO_FT11
:
3948 r
->feature
= &feature_fpu
;
3949 } else if (number
>= GDB_REGNO_CSR0
&& number
<= GDB_REGNO_CSR4095
) {
3951 r
->feature
= &feature_csr
;
3952 unsigned csr_number
= number
- GDB_REGNO_CSR0
;
3954 while (csr_info
[csr_info_index
].number
< csr_number
&&
3955 csr_info_index
< DIM(csr_info
) - 1) {
3958 if (csr_info
[csr_info_index
].number
== csr_number
) {
3959 r
->name
= csr_info
[csr_info_index
].name
;
3961 sprintf(reg_name
, "csr%d", csr_number
);
3962 /* Assume unnamed registers don't exist, unless we have some
3963 * configuration that tells us otherwise. That's important
3964 * because eg. Eclipse crashes if a target has too many
3965 * registers, and apparently has no way of only showing a
3966 * subset of registers in any case. */
3970 switch (csr_number
) {
3974 r
->exist
= riscv_supports_extension(target
, hartid
, 'F');
3976 r
->feature
= &feature_fpu
;
3982 case CSR_SCOUNTEREN
:
3988 r
->exist
= riscv_supports_extension(target
, hartid
, 'S');
3992 /* "In systems with only M-mode, or with both M-mode and
3993 * U-mode but without U-mode trap support, the medeleg and
3994 * mideleg registers should not exist." */
3995 r
->exist
= riscv_supports_extension(target
, hartid
, 'S') ||
3996 riscv_supports_extension(target
, hartid
, 'N');
4004 case CSR_HPMCOUNTER3H
:
4005 case CSR_HPMCOUNTER4H
:
4006 case CSR_HPMCOUNTER5H
:
4007 case CSR_HPMCOUNTER6H
:
4008 case CSR_HPMCOUNTER7H
:
4009 case CSR_HPMCOUNTER8H
:
4010 case CSR_HPMCOUNTER9H
:
4011 case CSR_HPMCOUNTER10H
:
4012 case CSR_HPMCOUNTER11H
:
4013 case CSR_HPMCOUNTER12H
:
4014 case CSR_HPMCOUNTER13H
:
4015 case CSR_HPMCOUNTER14H
:
4016 case CSR_HPMCOUNTER15H
:
4017 case CSR_HPMCOUNTER16H
:
4018 case CSR_HPMCOUNTER17H
:
4019 case CSR_HPMCOUNTER18H
:
4020 case CSR_HPMCOUNTER19H
:
4021 case CSR_HPMCOUNTER20H
:
4022 case CSR_HPMCOUNTER21H
:
4023 case CSR_HPMCOUNTER22H
:
4024 case CSR_HPMCOUNTER23H
:
4025 case CSR_HPMCOUNTER24H
:
4026 case CSR_HPMCOUNTER25H
:
4027 case CSR_HPMCOUNTER26H
:
4028 case CSR_HPMCOUNTER27H
:
4029 case CSR_HPMCOUNTER28H
:
4030 case CSR_HPMCOUNTER29H
:
4031 case CSR_HPMCOUNTER30H
:
4032 case CSR_HPMCOUNTER31H
:
4035 case CSR_MHPMCOUNTER3H
:
4036 case CSR_MHPMCOUNTER4H
:
4037 case CSR_MHPMCOUNTER5H
:
4038 case CSR_MHPMCOUNTER6H
:
4039 case CSR_MHPMCOUNTER7H
:
4040 case CSR_MHPMCOUNTER8H
:
4041 case CSR_MHPMCOUNTER9H
:
4042 case CSR_MHPMCOUNTER10H
:
4043 case CSR_MHPMCOUNTER11H
:
4044 case CSR_MHPMCOUNTER12H
:
4045 case CSR_MHPMCOUNTER13H
:
4046 case CSR_MHPMCOUNTER14H
:
4047 case CSR_MHPMCOUNTER15H
:
4048 case CSR_MHPMCOUNTER16H
:
4049 case CSR_MHPMCOUNTER17H
:
4050 case CSR_MHPMCOUNTER18H
:
4051 case CSR_MHPMCOUNTER19H
:
4052 case CSR_MHPMCOUNTER20H
:
4053 case CSR_MHPMCOUNTER21H
:
4054 case CSR_MHPMCOUNTER22H
:
4055 case CSR_MHPMCOUNTER23H
:
4056 case CSR_MHPMCOUNTER24H
:
4057 case CSR_MHPMCOUNTER25H
:
4058 case CSR_MHPMCOUNTER26H
:
4059 case CSR_MHPMCOUNTER27H
:
4060 case CSR_MHPMCOUNTER28H
:
4061 case CSR_MHPMCOUNTER29H
:
4062 case CSR_MHPMCOUNTER30H
:
4063 case CSR_MHPMCOUNTER31H
:
4064 r
->exist
= riscv_xlen(target
) == 32;
4073 r
->exist
= riscv_supports_extension(target
, hartid
, 'V');
4077 if (!r
->exist
&& expose_csr
) {
4078 for (unsigned i
= 0; expose_csr
[i
].low
<= expose_csr
[i
].high
; i
++) {
4079 if (csr_number
>= expose_csr
[i
].low
&& csr_number
<= expose_csr
[i
].high
) {
4080 LOG_INFO("Exposing additional CSR %d", csr_number
);
4087 } else if (number
== GDB_REGNO_PRIV
) {
4088 sprintf(reg_name
, "priv");
4089 r
->group
= "general";
4090 r
->feature
= &feature_virtual
;
4093 } else if (number
>= GDB_REGNO_V0
&& number
<= GDB_REGNO_V31
) {
4094 r
->caller_save
= false;
4095 r
->exist
= riscv_supports_extension(target
, hartid
, 'V') && info
->vlenb
[hartid
];
4096 r
->size
= info
->vlenb
[hartid
] * 8;
4097 sprintf(reg_name
, "v%d", number
- GDB_REGNO_V0
);
4098 r
->group
= "vector";
4099 r
->feature
= &feature_vector
;
4100 r
->reg_data_type
= &info
->type_vector
;
4102 } else if (number
>= GDB_REGNO_COUNT
) {
4103 /* Custom registers. */
4104 assert(expose_custom
);
4106 range_t
*range
= &expose_custom
[custom_range_index
];
4107 assert(range
->low
<= range
->high
);
4108 unsigned custom_number
= range
->low
+ custom_within_range
;
4110 r
->group
= "custom";
4111 r
->feature
= &feature_custom
;
4112 r
->arch_info
= calloc(1, sizeof(riscv_reg_info_t
));
4115 ((riscv_reg_info_t
*) r
->arch_info
)->target
= target
;
4116 ((riscv_reg_info_t
*) r
->arch_info
)->custom_number
= custom_number
;
4117 sprintf(reg_name
, "custom%d", custom_number
);
4119 custom_within_range
++;
4120 if (custom_within_range
> range
->high
- range
->low
) {
4121 custom_within_range
= 0;
4122 custom_range_index
++;
4128 reg_name
+= strlen(reg_name
) + 1;
4129 assert(reg_name
< info
->reg_names
+ target
->reg_cache
->num_regs
*
4131 r
->value
= info
->reg_cache_values
[number
];
4138 void riscv_add_bscan_tunneled_scan(struct target
*target
, struct scan_field
*field
,
4139 riscv_bscan_tunneled_scan_context_t
*ctxt
)
4141 jtag_add_ir_scan(target
->tap
, &select_user4
, TAP_IDLE
);
4143 memset(ctxt
->tunneled_dr
, 0, sizeof(ctxt
->tunneled_dr
));
4144 if (bscan_tunnel_type
== BSCAN_TUNNEL_DATA_REGISTER
) {
4145 ctxt
->tunneled_dr
[3].num_bits
= 1;
4146 ctxt
->tunneled_dr
[3].out_value
= bscan_one
;
4147 ctxt
->tunneled_dr
[2].num_bits
= 7;
4148 ctxt
->tunneled_dr_width
= field
->num_bits
;
4149 ctxt
->tunneled_dr
[2].out_value
= &ctxt
->tunneled_dr_width
;
4150 /* for BSCAN tunnel, there is a one-TCK skew between shift in and shift out, so
4151 scanning num_bits + 1, and then will right shift the input field after executing the queues */
4153 ctxt
->tunneled_dr
[1].num_bits
= field
->num_bits
+ 1;
4154 ctxt
->tunneled_dr
[1].out_value
= field
->out_value
;
4155 ctxt
->tunneled_dr
[1].in_value
= field
->in_value
;
4157 ctxt
->tunneled_dr
[0].num_bits
= 3;
4158 ctxt
->tunneled_dr
[0].out_value
= bscan_zero
;
4160 /* BSCAN_TUNNEL_NESTED_TAP */
4161 ctxt
->tunneled_dr
[0].num_bits
= 1;
4162 ctxt
->tunneled_dr
[0].out_value
= bscan_one
;
4163 ctxt
->tunneled_dr
[1].num_bits
= 7;
4164 ctxt
->tunneled_dr_width
= field
->num_bits
;
4165 ctxt
->tunneled_dr
[1].out_value
= &ctxt
->tunneled_dr_width
;
4166 /* for BSCAN tunnel, there is a one-TCK skew between shift in and shift out, so
4167 scanning num_bits + 1, and then will right shift the input field after executing the queues */
4168 ctxt
->tunneled_dr
[2].num_bits
= field
->num_bits
+ 1;
4169 ctxt
->tunneled_dr
[2].out_value
= field
->out_value
;
4170 ctxt
->tunneled_dr
[2].in_value
= field
->in_value
;
4171 ctxt
->tunneled_dr
[3].num_bits
= 3;
4172 ctxt
->tunneled_dr
[3].out_value
= bscan_zero
;
4174 jtag_add_dr_scan(target
->tap
, ARRAY_SIZE(ctxt
->tunneled_dr
), ctxt
->tunneled_dr
, TAP_IDLE
);