#include "config.h"
#endif
+#include "breakpoints.h"
#include "embeddedice.h"
#include "target_request.h"
#include "arm7_9_common.h"
#include "arm_simulator.h"
-int arm7_9_debug_entry(struct target *target);
+/**
+ * @file
+ * Hold common code supporting the ARM7 and ARM9 core generations.
+ *
+ * While the ARM core implementations evolved substantially during these
+ * two generations, they look quite similar from the JTAG perspective.
+ * Both have similar debug facilities, based on the same two scan chains
+ * providing access to the core and to an EmbeddedICE module. Both can
+ * support similar ETM and ETB modules, for tracing. And both expose
+ * what could be viewed as "ARM Classic", with multiple processor modes,
+ * shadowed registers, and support for the Thumb instruction set.
+ *
+ * Processor differences include things like presence or absence of MMU
+ * and cache, pipeline sizes, use of a modified Harvard Architecure
+ * (with separate instruction and data busses from the CPU), support
+ * for cpu clock gating during idle, and more.
+ */
+
+static int arm7_9_debug_entry(struct target *target);
/**
* Clear watchpoints for an ARM7/9 target.
return arm7_9_clear_watchpoints(arm7_9);
}
-/**
- * Retrieves the architecture information pointers for ARMv4/5 and ARM7/9
- * targets. A return of ERROR_OK signifies that the target is a valid target
- * and that the pointers have been set properly.
- *
- * @param target Pointer to the target device to get the pointers from
- * @param armv4_5_p Pointer to be filled in with the common struct for ARMV4/5
- * targets
- * @param arm7_9_p Pointer to be filled in with the common struct for ARM7/9
- * targets
- * @return ERROR_OK if successful
- */
-int arm7_9_get_arch_pointers(struct target *target, struct arm **armv4_5_p, struct arm7_9_common **arm7_9_p)
-{
- struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
-
- /* FIXME stop using this routine; just target_to_arm7_9() and
- * verify the resulting pointer using a replacement routine
- * that emits a usage message.
- */
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
- return ERROR_TARGET_INVALID;
-
- if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
- return ERROR_TARGET_INVALID;
-
- *armv4_5_p = armv4_5;
- *arm7_9_p = arm7_9;
-
- return ERROR_OK;
-}
-
/**
* Set either a hardware or software breakpoint on an ARM7/9 target. The
* breakpoint is set up even if it is already set. Some actions, e.g. reset,
* @param target Pointer to target that is entering debug mode
* @return Error code if anything fails, otherwise ERROR_OK
*/
-int arm7_9_debug_entry(struct target *target)
+static int arm7_9_debug_entry(struct target *target)
{
int i;
uint32_t context[16];
return retval;
}
-int arm7_9_checksum_memory(struct target *target, uint32_t address, uint32_t count, uint32_t* checksum)
+/**
+ * Perform per-target setup that requires JTAG access.
+ */
+int arm7_9_examine(struct target *target)
{
- struct working_area *crc_algorithm;
- struct armv4_5_algorithm armv4_5_info;
- struct reg_param reg_params[2];
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
int retval;
- static const uint32_t arm7_9_crc_code[] = {
- 0xE1A02000, /* mov r2, r0 */
- 0xE3E00000, /* mov r0, #0xffffffff */
- 0xE1A03001, /* mov r3, r1 */
- 0xE3A04000, /* mov r4, #0 */
- 0xEA00000B, /* b ncomp */
- /* nbyte: */
- 0xE7D21004, /* ldrb r1, [r2, r4] */
- 0xE59F7030, /* ldr r7, CRC32XOR */
- 0xE0200C01, /* eor r0, r0, r1, asl 24 */
- 0xE3A05000, /* mov r5, #0 */
- /* loop: */
- 0xE3500000, /* cmp r0, #0 */
- 0xE1A06080, /* mov r6, r0, asl #1 */
- 0xE2855001, /* add r5, r5, #1 */
- 0xE1A00006, /* mov r0, r6 */
- 0xB0260007, /* eorlt r0, r6, r7 */
- 0xE3550008, /* cmp r5, #8 */
- 0x1AFFFFF8, /* bne loop */
- 0xE2844001, /* add r4, r4, #1 */
- /* ncomp: */
- 0xE1540003, /* cmp r4, r3 */
- 0x1AFFFFF1, /* bne nbyte */
- /* end: */
- 0xEAFFFFFE, /* b end */
- 0x04C11DB7 /* CRC32XOR: .word 0x04C11DB7 */
- };
+ if (!target_was_examined(target)) {
+ struct reg_cache *t, **cache_p;
- uint32_t i;
+ t = embeddedice_build_reg_cache(target, arm7_9);
+ if (t == NULL)
+ return ERROR_FAIL;
- if (target_alloc_working_area(target, sizeof(arm7_9_crc_code), &crc_algorithm) != ERROR_OK)
- {
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
+ cache_p = register_get_last_cache_p(&target->reg_cache);
+ (*cache_p) = t;
+ arm7_9->eice_cache = (*cache_p);
- /* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(arm7_9_crc_code)/sizeof(uint32_t)); i++)
- {
- if ((retval = target_write_u32(target, crc_algorithm->address + i*sizeof(uint32_t), arm7_9_crc_code[i])) != ERROR_OK)
- {
- return retval;
- }
- }
-
- armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
- armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
- armv4_5_info.core_state = ARMV4_5_STATE_ARM;
-
- init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT);
- init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
-
- buf_set_u32(reg_params[0].value, 0, 32, address);
- buf_set_u32(reg_params[1].value, 0, 32, count);
-
- /* 20 second timeout/megabyte */
- int timeout = 20000 * (1 + (count / (1024*1024)));
+ if (arm7_9->armv4_5_common.etm)
+ (*cache_p)->next = etm_build_reg_cache(target,
+ &arm7_9->jtag_info,
+ arm7_9->armv4_5_common.etm);
- if ((retval = target_run_algorithm(target, 0, NULL, 2, reg_params,
- crc_algorithm->address, crc_algorithm->address + (sizeof(arm7_9_crc_code) - 8), timeout, &armv4_5_info)) != ERROR_OK)
- {
- LOG_ERROR("error executing arm7_9 crc algorithm");
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- target_free_working_area(target, crc_algorithm);
- return retval;
+ target_set_examined(target);
}
- *checksum = buf_get_u32(reg_params[0].value, 0, 32);
-
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
-
- target_free_working_area(target, crc_algorithm);
-
- return ERROR_OK;
+ retval = embeddedice_setup(target);
+ if (retval == ERROR_OK)
+ retval = arm7_9_setup(target);
+ if (retval == ERROR_OK && arm7_9->armv4_5_common.etm)
+ retval = etm_setup(target);
+ return retval;
}
-int arm7_9_blank_check_memory(struct target *target, uint32_t address, uint32_t count, uint32_t* blank)
-{
- struct working_area *erase_check_algorithm;
- struct reg_param reg_params[3];
- struct armv4_5_algorithm armv4_5_info;
- int retval;
- uint32_t i;
-
- static const uint32_t erase_check_code[] =
- {
- /* loop: */
- 0xe4d03001, /* ldrb r3, [r0], #1 */
- 0xe0022003, /* and r2, r2, r3 */
- 0xe2511001, /* subs r1, r1, #1 */
- 0x1afffffb, /* bne loop */
- /* end: */
- 0xeafffffe /* b end */
- };
-
- /* make sure we have a working area */
- if (target_alloc_working_area(target, sizeof(erase_check_code), &erase_check_algorithm) != ERROR_OK)
- {
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- /* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(erase_check_code)/sizeof(uint32_t)); i++)
- if ((retval = target_write_u32(target, erase_check_algorithm->address + i*sizeof(uint32_t), erase_check_code[i])) != ERROR_OK)
- {
- return retval;
- }
-
- armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
- armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
- armv4_5_info.core_state = ARMV4_5_STATE_ARM;
-
- init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
- buf_set_u32(reg_params[0].value, 0, 32, address);
-
- init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
- buf_set_u32(reg_params[1].value, 0, 32, count);
-
- init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT);
- buf_set_u32(reg_params[2].value, 0, 32, 0xff);
-
- if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
- erase_check_algorithm->address, erase_check_algorithm->address + (sizeof(erase_check_code) - 4), 10000, &armv4_5_info)) != ERROR_OK)
- {
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- destroy_reg_param(®_params[2]);
- target_free_working_area(target, erase_check_algorithm);
- return 0;
- }
-
- *blank = buf_get_u32(reg_params[2].value, 0, 32);
-
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- destroy_reg_param(®_params[2]);
-
- target_free_working_area(target, erase_check_algorithm);
-
- return ERROR_OK;
-}
COMMAND_HANDLER(handle_arm7_9_write_xpsr_command)
{
int spsr;
int retval;
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(cmd_ctx, "can't write registers while running");
- return ERROR_OK;
+ return ERROR_FAIL;
}
if (argc < 2)
{
command_print(cmd_ctx, "usage: write_xpsr <value> <not cpsr | spsr>");
- return ERROR_OK;
+ return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(u32, args[0], value);
int spsr;
int retval;
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(cmd_ctx, "can't write registers while running");
- return ERROR_OK;
+ return ERROR_FAIL;
}
if (argc < 3)
{
command_print(cmd_ctx, "usage: write_xpsr_im8 <im8> <rotate> <not cpsr | spsr>");
- return ERROR_OK;
+ return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(u32, args[0], value);
uint32_t mode;
int num;
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(cmd_ctx, "can't write registers while running");
- return ERROR_OK;
+ return ERROR_FAIL;
}
if (argc < 3)
{
command_print(cmd_ctx, "usage: write_core_reg <num> <mode> <value>");
- return ERROR_OK;
+ return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(int, args[0], num);
COMMAND_HANDLER(handle_arm7_9_dbgrq_command)
{
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (argc > 0)
COMMAND_HANDLER(handle_arm7_9_fast_memory_access_command)
{
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (argc > 0)
COMMAND_HANDLER(handle_arm7_9_dcc_downloads_command)
{
struct target *target = get_current_target(cmd_ctx);
- struct arm *armv4_5;
- struct arm7_9_common *arm7_9;
+ struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+ if (!is_arm7_9(arm7_9))
{
command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
+ return ERROR_TARGET_INVALID;
}
if (argc > 0)
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