#include "config.h"
#endif
+#include "breakpoints.h"
#include "armv7m.h"
-
-#define ARRAY_SIZE(x) ((int)(sizeof(x)/sizeof((x)[0])))
+#include "algorithm.h"
+#include "register.h"
#if 0
#define _DEBUG_INSTRUCTION_EXECUTION_
#endif
-char* armv7m_mode_strings[] =
+/** Maps from enum armv7m_mode (except ARMV7M_MODE_ANY) to name. */
+char *armv7m_mode_strings[] =
{
"Thread", "Thread (User)", "Handler",
};
"DebugMonitor", "RESERVED", "PendSV", "SysTick"
};
-uint8_t armv7m_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-reg_t armv7m_gdb_dummy_fp_reg =
-{
- "GDB dummy floating-point register", armv7m_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
-};
-
-uint8_t armv7m_gdb_dummy_fps_value[] = {0, 0, 0, 0};
-
-reg_t armv7m_gdb_dummy_fps_reg =
-{
- "GDB dummy floating-point status register", armv7m_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
-};
-
#ifdef ARMV7_GDB_HACKS
uint8_t armv7m_gdb_dummy_cpsr_value[] = {0, 0, 0, 0};
-reg_t armv7m_gdb_dummy_cpsr_reg =
+struct reg armv7m_gdb_dummy_cpsr_reg =
{
- "GDB dummy cpsr register", armv7m_gdb_dummy_cpsr_value, 0, 1, 32, NULL, 0, NULL, 0
+ .name = "GDB dummy cpsr register",
+ .value = armv7m_gdb_dummy_cpsr_value,
+ .dirty = 0,
+ .valid = 1,
+ .size = 32,
+ .arch_info = NULL,
};
#endif
* These registers are not memory-mapped. The ARMv7-M profile includes
* memory mapped registers too, such as for the NVIC (interrupt controller)
* and SysTick (timer) modules; those can mostly be treated as peripherals.
+ *
+ * The ARMv6-M profile is almost identical in this respect, except that it
+ * doesn't include basepri or faultmask registers.
*/
static const struct {
unsigned id;
- char *name;
+ const char *name;
unsigned bits;
} armv7m_regs[] = {
{ ARMV7M_R0, "r0", 32 },
#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
-int armv7m_core_reg_arch_type = -1;
-int armv7m_dummy_core_reg_arch_type = -1;
-
-int armv7m_restore_context(target_t *target)
+/**
+ * Restores target context using the cache of core registers set up
+ * by armv7m_build_reg_cache(), calling optional core-specific hooks.
+ */
+int armv7m_restore_context(struct target *target)
{
int i;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
LOG_DEBUG(" ");
}
}
- if (armv7m->post_restore_context)
- armv7m->post_restore_context(target);
-
return ERROR_OK;
}
/* Core state functions */
+
+/**
+ * Maps ISR number (from xPSR) to name.
+ * Note that while names and meanings for the first sixteen are standardized
+ * (with zero not a true exception), external interrupts are only numbered.
+ * They are assigned by vendors, which generally assign different numbers to
+ * peripherals (such as UART0 or a USB peripheral controller).
+ */
char *armv7m_exception_string(int number)
{
static char enamebuf[32];
return enamebuf;
}
-int armv7m_get_core_reg(reg_t *reg)
+static int armv7m_get_core_reg(struct reg *reg)
{
int retval;
- armv7m_core_reg_t *armv7m_reg = reg->arch_info;
- target_t *target = armv7m_reg->target;
- armv7m_common_t *armv7m_target = target->arch_info;
+ struct armv7m_core_reg *armv7m_reg = reg->arch_info;
+ struct target *target = armv7m_reg->target;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
if (target->state != TARGET_HALTED)
{
return ERROR_TARGET_NOT_HALTED;
}
- retval = armv7m_target->read_core_reg(target, armv7m_reg->num);
+ retval = armv7m->read_core_reg(target, armv7m_reg->num);
return retval;
}
-int armv7m_set_core_reg(reg_t *reg, uint8_t *buf)
+static int armv7m_set_core_reg(struct reg *reg, uint8_t *buf)
{
- armv7m_core_reg_t *armv7m_reg = reg->arch_info;
- target_t *target = armv7m_reg->target;
+ struct armv7m_core_reg *armv7m_reg = reg->arch_info;
+ struct target *target = armv7m_reg->target;
uint32_t value = buf_get_u32(buf, 0, 32);
if (target->state != TARGET_HALTED)
return ERROR_OK;
}
-int armv7m_read_core_reg(struct target_s *target, int num)
+static int armv7m_read_core_reg(struct target *target, unsigned num)
{
uint32_t reg_value;
int retval;
- armv7m_core_reg_t * armv7m_core_reg;
+ struct armv7m_core_reg * armv7m_core_reg;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
-
- if ((num < 0) || (num >= ARMV7M_NUM_REGS))
+ if (num >= ARMV7M_NUM_REGS)
return ERROR_INVALID_ARGUMENTS;
armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
return retval;
}
-int armv7m_write_core_reg(struct target_s *target, int num)
+static int armv7m_write_core_reg(struct target *target, unsigned num)
{
int retval;
uint32_t reg_value;
- armv7m_core_reg_t *armv7m_core_reg;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
+ struct armv7m_core_reg *armv7m_core_reg;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
- if ((num < 0) || (num >= ARMV7M_NUM_REGS))
+ if (num >= ARMV7M_NUM_REGS)
return ERROR_INVALID_ARGUMENTS;
reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32);
return ERROR_OK;
}
-int armv7m_invalidate_core_regs(target_t *target)
-{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- int i;
-
- for (i = 0; i < armv7m->core_cache->num_regs; i++)
- {
- armv7m->core_cache->reg_list[i].valid = 0;
- armv7m->core_cache->reg_list[i].dirty = 0;
- }
-
- return ERROR_OK;
-}
-
-int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
+/**
+ * Returns generic ARM userspace registers to GDB.
+ * GDB doesn't quite understand that most ARMs don't have floating point
+ * hardware, so this also fakes a set of long-obsolete FPA registers that
+ * are not used in EABI based software stacks.
+ */
+int armv7m_get_gdb_reg_list(struct target *target, struct reg **reg_list[], int *reg_list_size)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
int i;
*reg_list_size = 26;
- *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
+ *reg_list = malloc(sizeof(struct reg*) * (*reg_list_size));
/*
* GDB register packet format for ARM:
}
for (i = 16; i < 24; i++)
- {
- (*reg_list)[i] = &armv7m_gdb_dummy_fp_reg;
- }
-
- (*reg_list)[24] = &armv7m_gdb_dummy_fps_reg;
+ (*reg_list)[i] = &arm_gdb_dummy_fp_reg;
+ (*reg_list)[24] = &arm_gdb_dummy_fps_reg;
#ifdef ARMV7_GDB_HACKS
/* use dummy cpsr reg otherwise gdb may try and set the thumb bit */
/* ARMV7M is always in thumb mode, try to make GDB understand this
* if it does not support this arch */
- *((char*)armv7m->core_cache->reg_list[15].value) |= 1;
+ *((char*)armv7m->arm.pc->value) |= 1;
#else
(*reg_list)[25] = &armv7m->core_cache->reg_list[ARMV7M_xPSR];
#endif
return ERROR_OK;
}
-/* run to exit point. return error if exit point was not reached. */
-static int armv7m_run_and_wait(struct target_s *target, uint32_t entry_point, int timeout_ms, uint32_t exit_point, armv7m_common_t *armv7m)
+/** Runs a Thumb algorithm in the target. */
+int armv7m_run_algorithm(struct target *target,
+ int num_mem_params, struct mem_param *mem_params,
+ int num_reg_params, struct reg_param *reg_params,
+ uint32_t entry_point, uint32_t exit_point,
+ int timeout_ms, void *arch_info)
{
- uint32_t pc;
int retval;
- /* This code relies on the target specific resume() and poll()->debug_entry()
- * sequence to write register values to the processor and the read them back */
- if ((retval = target_resume(target, 0, entry_point, 1, 1)) != ERROR_OK)
- {
- return retval;
- }
- retval = target_wait_state(target, TARGET_HALTED, timeout_ms);
- /* If the target fails to halt due to the breakpoint, force a halt */
- if (retval != ERROR_OK || target->state != TARGET_HALTED)
- {
- if ((retval = target_halt(target)) != ERROR_OK)
- return retval;
- if ((retval = target_wait_state(target, TARGET_HALTED, 500)) != ERROR_OK)
- {
- return retval;
- }
- return ERROR_TARGET_TIMEOUT;
- }
+ retval = armv7m_start_algorithm(target,
+ num_mem_params, mem_params,
+ num_reg_params, reg_params,
+ entry_point, exit_point,
+ arch_info);
- armv7m->load_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 15, &pc);
- if (pc != exit_point)
- {
- LOG_DEBUG("failed algoritm halted at 0x%" PRIx32 " ", pc);
- return ERROR_TARGET_TIMEOUT;
- }
+ if (retval == ERROR_OK)
+ retval = armv7m_wait_algorithm(target,
+ num_mem_params, mem_params,
+ num_reg_params, reg_params,
+ exit_point, timeout_ms,
+ arch_info);
- return ERROR_OK;
+ return retval;
}
-int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info)
+/** Starts a Thumb algorithm in the target. */
+int armv7m_start_algorithm(struct target *target,
+ int num_mem_params, struct mem_param *mem_params,
+ int num_reg_params, struct reg_param *reg_params,
+ uint32_t entry_point, uint32_t exit_point,
+ void *arch_info)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- armv7m_algorithm_t *armv7m_algorithm_info = arch_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct armv7m_algorithm *armv7m_algorithm_info = arch_info;
enum armv7m_mode core_mode = armv7m->core_mode;
int retval = ERROR_OK;
- int i;
- uint32_t context[ARMV7M_NUM_REGS];
+
+ /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
+ * at the exit point */
if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
{
/* refresh core register cache */
/* Not needed if core register cache is always consistent with target process state */
- for (i = 0; i < ARMV7M_NUM_REGS; i++)
+ for (unsigned i = 0; i < ARMV7M_NUM_REGS; i++)
{
if (!armv7m->core_cache->reg_list[i].valid)
armv7m->read_core_reg(target, i);
- context[i] = buf_get_u32(armv7m->core_cache->reg_list[i].value, 0, 32);
+ armv7m_algorithm_info->context[i] = buf_get_u32(armv7m->core_cache->reg_list[i].value, 0, 32);
}
- for (i = 0; i < num_mem_params; i++)
+ for (int i = 0; i < num_mem_params; i++)
{
+ // TODO: Write only out params
if ((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
return retval;
}
- for (i = 0; i < num_reg_params; i++)
+ for (int i = 0; i < num_reg_params; i++)
{
- reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
+ struct reg *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
// uint32_t regvalue;
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
// regvalue = buf_get_u32(reg_params[i].value, 0, 32);
armv7m->core_cache->reg_list[ARMV7M_CONTROL].dirty = 1;
armv7m->core_cache->reg_list[ARMV7M_CONTROL].valid = 1;
}
+ armv7m_algorithm_info->core_mode = core_mode;
+
+ retval = target_resume(target, 0, entry_point, 1, 1);
- /* ARMV7M always runs in Thumb state */
- if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK)
+ return retval;
+}
+
+/** Waits for an algorithm in the target. */
+int armv7m_wait_algorithm(struct target *target,
+ int num_mem_params, struct mem_param *mem_params,
+ int num_reg_params, struct reg_param *reg_params,
+ uint32_t exit_point, int timeout_ms,
+ void *arch_info)
+{
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct armv7m_algorithm *armv7m_algorithm_info = arch_info;
+ int retval = ERROR_OK;
+ uint32_t pc;
+
+ /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
+ * at the exit point */
+
+ if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
{
- LOG_ERROR("can't add breakpoint to finish algorithm execution");
- return ERROR_TARGET_FAILURE;
+ LOG_ERROR("current target isn't an ARMV7M target");
+ return ERROR_TARGET_INVALID;
}
- retval = armv7m_run_and_wait(target, entry_point, timeout_ms, exit_point, armv7m);
-
- breakpoint_remove(target, exit_point);
+ retval = target_wait_state(target, TARGET_HALTED, timeout_ms);
+ /* If the target fails to halt due to the breakpoint, force a halt */
+ if (retval != ERROR_OK || target->state != TARGET_HALTED)
+ {
+ if ((retval = target_halt(target)) != ERROR_OK)
+ return retval;
+ if ((retval = target_wait_state(target, TARGET_HALTED, 500)) != ERROR_OK)
+ {
+ return retval;
+ }
+ return ERROR_TARGET_TIMEOUT;
+ }
- if (retval != ERROR_OK)
+ armv7m->load_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 15, &pc);
+ if (exit_point && (pc != exit_point))
{
- return retval;
+ LOG_DEBUG("failed algorithm halted at 0x%" PRIx32 ", expected 0x%" PRIx32 , pc, exit_point);
+ return ERROR_TARGET_TIMEOUT;
}
/* Read memory values to mem_params[] */
- for (i = 0; i < num_mem_params; i++)
+ for (int i = 0; i < num_mem_params; i++)
{
if (mem_params[i].direction != PARAM_OUT)
if ((retval = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
}
/* Copy core register values to reg_params[] */
- for (i = 0; i < num_reg_params; i++)
+ for (int i = 0; i < num_reg_params; i++)
{
if (reg_params[i].direction != PARAM_OUT)
{
- reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
+ struct reg *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
}
}
- for (i = ARMV7M_NUM_REGS - 1; i >= 0; i--)
+ for (int i = ARMV7M_NUM_REGS - 1; i >= 0; i--)
{
uint32_t regvalue;
regvalue = buf_get_u32(armv7m->core_cache->reg_list[i].value, 0, 32);
- if (regvalue != context[i])
+ if (regvalue != armv7m_algorithm_info->context[i])
{
LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32,
- armv7m->core_cache->reg_list[i].name, context[i]);
+ armv7m->core_cache->reg_list[i].name, armv7m_algorithm_info->context[i]);
buf_set_u32(armv7m->core_cache->reg_list[i].value,
- 0, 32, context[i]);
+ 0, 32, armv7m_algorithm_info->context[i]);
armv7m->core_cache->reg_list[i].valid = 1;
armv7m->core_cache->reg_list[i].dirty = 1;
}
}
- armv7m->core_mode = core_mode;
+ armv7m->core_mode = armv7m_algorithm_info->core_mode;
return retval;
}
-int armv7m_arch_state(struct target_s *target)
+/** Logs summary of ARMv7-M state for a halted target. */
+int armv7m_arch_state(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct arm *arm = &armv7m->arm;
uint32_t ctrl, sp;
ctrl = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 32);
sp = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_R13].value, 0, 32);
LOG_USER("target halted due to %s, current mode: %s %s\n"
- "xPSR: %#8.8" PRIx32 " pc: %#8.8" PRIx32 " %csp: %#8.8" PRIx32,
- Jim_Nvp_value2name_simple(nvp_target_debug_reason,
- target->debug_reason)->name,
+ "xPSR: %#8.8" PRIx32 " pc: %#8.8" PRIx32 " %csp: %#8.8" PRIx32 "%s",
+ debug_reason_name(target),
armv7m_mode_strings[armv7m->core_mode],
armv7m_exception_string(armv7m->exception_number),
- buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32),
- buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_PC].value, 0, 32),
+ buf_get_u32(arm->cpsr->value, 0, 32),
+ buf_get_u32(arm->pc->value, 0, 32),
(ctrl & 0x02) ? 'p' : 'm',
- sp);
+ sp,
+ arm->is_semihosting ? ", semihosting" : "");
return ERROR_OK;
}
+static const struct reg_arch_type armv7m_reg_type = {
+ .get = armv7m_get_core_reg,
+ .set = armv7m_set_core_reg,
+};
-reg_cache_t *armv7m_build_reg_cache(target_t *target)
+/** Builds cache of architecturally defined registers. */
+struct reg_cache *armv7m_build_reg_cache(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
-
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct arm *arm = &armv7m->arm;
int num_regs = ARMV7M_NUM_REGS;
- reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
- reg_cache_t *cache = malloc(sizeof(reg_cache_t));
- reg_t *reg_list = calloc(num_regs, sizeof(reg_t));
- armv7m_core_reg_t *arch_info = calloc(num_regs, sizeof(armv7m_core_reg_t));
+ struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
+ struct reg_cache *cache = malloc(sizeof(struct reg_cache));
+ struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
+ struct armv7m_core_reg *arch_info = calloc(num_regs, sizeof(struct armv7m_core_reg));
int i;
- if (armv7m_core_reg_arch_type == -1)
- {
- armv7m_core_reg_arch_type = register_reg_arch_type(armv7m_get_core_reg, armv7m_set_core_reg);
- }
-
- register_init_dummy(&armv7m_gdb_dummy_fps_reg);
#ifdef ARMV7_GDB_HACKS
register_init_dummy(&armv7m_gdb_dummy_cpsr_reg);
#endif
- register_init_dummy(&armv7m_gdb_dummy_fp_reg);
/* Build the process context cache */
cache->name = "arm v7m registers";
reg_list[i].value = calloc(1, 4);
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
- reg_list[i].bitfield_desc = NULL;
- reg_list[i].num_bitfields = 0;
- reg_list[i].arch_type = armv7m_core_reg_arch_type;
+ reg_list[i].type = &armv7m_reg_type;
reg_list[i].arch_info = &arch_info[i];
}
+ arm->cpsr = reg_list + ARMV7M_xPSR;
+ arm->pc = reg_list + ARMV7M_PC;
+ arm->core_cache = cache;
return cache;
}
-int armv7m_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
+static int armv7m_setup_semihosting(struct target *target, int enable)
{
- armv7m_build_reg_cache(target);
-
+ /* nothing todo for armv7m */
return ERROR_OK;
}
-int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m)
+/** Sets up target as a generic ARMv7-M core */
+int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m)
{
- /* register arch-specific functions */
+ struct arm *arm = &armv7m->arm;
+
+ armv7m->common_magic = ARMV7M_COMMON_MAGIC;
+
+ arm->core_type = ARM_MODE_THREAD;
+ arm->arch_info = armv7m;
+ arm->setup_semihosting = armv7m_setup_semihosting;
- target->arch_info = armv7m;
+ /* FIXME remove v7m-specific r/w core_reg functions;
+ * use the generic ARM core support..
+ */
armv7m->read_core_reg = armv7m_read_core_reg;
armv7m->write_core_reg = armv7m_write_core_reg;
- return ERROR_OK;
+ return arm_init_arch_info(target, arm);
}
-int armv7m_checksum_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* checksum)
+/** Generates a CRC32 checksum of a memory region. */
+int armv7m_checksum_memory(struct target *target,
+ uint32_t address, uint32_t count, uint32_t* checksum)
{
- working_area_t *crc_algorithm;
- armv7m_algorithm_t armv7m_info;
- reg_param_t reg_params[2];
+ struct working_area *crc_algorithm;
+ struct armv7m_algorithm armv7m_info;
+ struct reg_param reg_params[2];
int retval;
- uint16_t cortex_m3_crc_code[] = {
+ /* see contib/loaders/checksum/armv7m_crc.s for src */
+
+ static const uint16_t cortex_m3_crc_code[] = {
0x4602, /* mov r2, r0 */
0xF04F, 0x30FF, /* mov r0, #0xffffffff */
0x460B, /* mov r3, r1 */
/* ncomp: */
0x429C, /* cmp r4, r3 */
0xD1E9, /* bne nbyte */
- /* end: */
- 0xE7FE, /* b end */
+ 0xBE00, /* bkpt #0 */
0x1DB7, 0x04C1 /* CRC32XOR: .word 0x04C11DB7 */
};
uint32_t i;
- if (target_alloc_working_area(target, sizeof(cortex_m3_crc_code), &crc_algorithm) != ERROR_OK)
- {
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
+ retval = target_alloc_working_area(target, sizeof(cortex_m3_crc_code), &crc_algorithm);
+ if (retval != ERROR_OK)
+ return retval;
/* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(cortex_m3_crc_code)/sizeof(uint16_t)); i++)
- if ((retval = target_write_u16(target, crc_algorithm->address + i*sizeof(uint16_t), cortex_m3_crc_code[i])) != ERROR_OK)
- {
- return retval;
- }
+ for (i = 0; i < ARRAY_SIZE(cortex_m3_crc_code); i++) {
+ retval = target_write_u16(target, crc_algorithm->address + i*sizeof(uint16_t), cortex_m3_crc_code[i]);
+ if (retval != ERROR_OK)
+ goto cleanup;
+ }
armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
armv7m_info.core_mode = ARMV7M_MODE_ANY;
buf_set_u32(reg_params[0].value, 0, 32, address);
buf_set_u32(reg_params[1].value, 0, 32, count);
- if ((retval = target_run_algorithm(target, 0, NULL, 2, reg_params,
- crc_algorithm->address, crc_algorithm->address + (sizeof(cortex_m3_crc_code)-6), 20000, &armv7m_info)) != ERROR_OK)
- {
- LOG_ERROR("error executing cortex_m3 crc algorithm");
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- target_free_working_area(target, crc_algorithm);
- return retval;
- }
+ int timeout = 20000 * (1 + (count / (1024 * 1024)));
+
+ retval = target_run_algorithm(target, 0, NULL, 2, reg_params, crc_algorithm->address,
+ crc_algorithm->address + (sizeof(cortex_m3_crc_code) - 6),
+ timeout, &armv7m_info);
- *checksum = buf_get_u32(reg_params[0].value, 0, 32);
+ if (retval == ERROR_OK)
+ *checksum = buf_get_u32(reg_params[0].value, 0, 32);
+ else
+ LOG_ERROR("error executing cortex_m3 crc algorithm");
destroy_reg_param(®_params[0]);
destroy_reg_param(®_params[1]);
+cleanup:
target_free_working_area(target, crc_algorithm);
- return ERROR_OK;
+ return retval;
}
-int armv7m_blank_check_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* blank)
+/** Checks whether a memory region is zeroed. */
+int armv7m_blank_check_memory(struct target *target,
+ uint32_t address, uint32_t count, uint32_t* blank)
{
- working_area_t *erase_check_algorithm;
- reg_param_t reg_params[3];
- armv7m_algorithm_t armv7m_info;
+ struct working_area *erase_check_algorithm;
+ struct reg_param reg_params[3];
+ struct armv7m_algorithm armv7m_info;
int retval;
uint32_t i;
- uint16_t erase_check_code[] =
+ static const uint16_t erase_check_code[] =
{
- /* loop: */
- 0xF810, 0x3B01, /* ldrb r3, [r0], #1 */
- 0xEA02, 0x0203, /* and r2, r2, r3 */
- 0x3901, /* subs r1, r1, #1 */
- 0xD1F9, /* bne loop */
- /* end: */
- 0xE7FE, /* b end */
+ /* loop: */
+ 0xF810, 0x3B01, /* ldrb r3, [r0], #1 */
+ 0xEA02, 0x0203, /* and r2, r2, r3 */
+ 0x3901, /* subs r1, r1, #1 */
+ 0xD1F9, /* bne loop */
+ 0xBE00, /* bkpt #0 */
};
/* make sure we have a working area */
}
/* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(erase_check_code)/sizeof(uint16_t)); i++)
+ for (i = 0; i < ARRAY_SIZE(erase_check_code); i++)
target_write_u16(target, erase_check_algorithm->address + i*sizeof(uint16_t), erase_check_code[i]);
armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
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)-2), 10000, &armv7m_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;
- }
+ retval = target_run_algorithm(target, 0, NULL, 3, reg_params, erase_check_algorithm->address,
+ erase_check_algorithm->address + (sizeof(erase_check_code) - 2),
+ 10000, &armv7m_info);
- *blank = buf_get_u32(reg_params[2].value, 0, 32);
+ if (retval == ERROR_OK)
+ *blank = buf_get_u32(reg_params[2].value, 0, 32);
destroy_reg_param(®_params[0]);
destroy_reg_param(®_params[1]);
target_free_working_area(target, erase_check_algorithm);
- return ERROR_OK;
-}
-
-/*
- * Return the debug ap baseaddress in hexadecimal;
- * no extra output to simplify script processing
- */
-static int handle_dap_baseaddr_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- uint32_t apsel, apselsave, baseaddr;
- int retval;
-
- apsel = swjdp->apsel;
- apselsave = swjdp->apsel;
- if (argc > 0)
- {
- apsel = strtoul(args[0], NULL, 0);
- }
- if (apselsave != apsel)
- {
- dap_ap_select(swjdp, apsel);
- }
-
- dap_ap_read_reg_u32(swjdp, 0xF8, &baseaddr);
- retval = swjdp_transaction_endcheck(swjdp);
- command_print(cmd_ctx, "0x%8.8" PRIx32 "", baseaddr);
-
- if (apselsave != apsel)
- {
- dap_ap_select(swjdp, apselsave);
- }
-
return retval;
}
-
-/*
- * Return the debug ap id in hexadecimal;
- * no extra output to simplify script processing
- */
-extern int handle_dap_apid_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
+int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found)
{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct reg *r = armv7m->arm.pc;
+ bool result = false;
- return dap_apid_command(cmd_ctx, swjdp, args, argc);
-}
-static int handle_dap_apsel_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ /* if we halted last time due to a bkpt instruction
+ * then we have to manually step over it, otherwise
+ * the core will break again */
- return dap_apsel_command(cmd_ctx, swjdp, args, argc);
-}
-
-static int handle_dap_memaccess_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
-
- return dap_memaccess_command(cmd_ctx, swjdp, args, argc);
-}
-
-
-static int handle_dap_info_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- uint32_t apsel;
-
- apsel = swjdp->apsel;
- if (argc > 0)
- apsel = strtoul(args[0], NULL, 0);
+ if (target->debug_reason == DBG_REASON_BREAKPOINT)
+ {
+ uint16_t op;
+ uint32_t pc = buf_get_u32(r->value, 0, 32);
- return dap_info_command(cmd_ctx, swjdp, apsel);
-}
+ pc &= ~1;
+ if (target_read_u16(target, pc, &op) == ERROR_OK)
+ {
+ if ((op & 0xFF00) == 0xBE00)
+ {
+ pc = buf_get_u32(r->value, 0, 32) + 2;
+ buf_set_u32(r->value, 0, 32, pc);
+ r->dirty = true;
+ r->valid = true;
+ result = true;
+ LOG_DEBUG("Skipping over BKPT instruction");
+ }
+ }
+ }
-int armv7m_register_commands(struct command_context_s *cmd_ctx)
-{
- command_t *arm_adi_v5_dap_cmd;
-
- arm_adi_v5_dap_cmd = register_command(cmd_ctx, NULL, "dap",
- NULL, COMMAND_ANY,
- "cortex dap specific commands");
-
- register_command(cmd_ctx, arm_adi_v5_dap_cmd, "info",
- handle_dap_info_command, COMMAND_EXEC,
- "Displays dap info for ap [num],"
- "default currently selected AP");
- register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apsel",
- handle_dap_apsel_command, COMMAND_EXEC,
- "Select a different AP [num] (default 0)");
- register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apid",
- handle_dap_apid_command, COMMAND_EXEC,
- "Displays id reg from AP [num], "
- "default currently selected AP");
- register_command(cmd_ctx, arm_adi_v5_dap_cmd, "baseaddr",
- handle_dap_baseaddr_command, COMMAND_EXEC,
- "Displays debug base address from AP [num],"
- "default currently selected AP");
- register_command(cmd_ctx, arm_adi_v5_dap_cmd, "memaccess",
- handle_dap_memaccess_command, COMMAND_EXEC,
- "set/get number of extra tck for mem-ap "
- "memory bus access [0-255]");
+ if (inst_found) {
+ *inst_found = result;
+ }
return ERROR_OK;
}
+
+const struct command_registration armv7m_command_handlers[] = {
+ {
+ .chain = arm_command_handlers,
+ },
+ {
+ .chain = dap_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
Code Review / openocd.git / blobdiff