#endif
#include "breakpoints.h"
-#include "target.h"
#include "armv7m.h"
#include "algorithm.h"
#include "register.h"
"DebugMonitor", "RESERVED", "PendSV", "SysTick"
};
-/* FIXME these dummies are IDENTICAL to the armv4_5, arm11, and armv7a
- * ones... except for naming/scoping
- */
-static uint8_t armv7m_gdb_dummy_fp_value[12];
-
-static struct reg armv7m_gdb_dummy_fp_reg =
-{
- .name = "GDB dummy floating-point register",
- .value = armv7m_gdb_dummy_fp_value,
- .dirty = 0,
- .valid = 1,
- .size = 96,
- .arch_info = NULL,
-};
-
-static uint8_t armv7m_gdb_dummy_fps_value[4];
-
-static struct reg armv7m_gdb_dummy_fps_reg =
-{
- .name = "GDB dummy floating-point status register",
- .value = armv7m_gdb_dummy_fps_value,
- .dirty = 0,
- .valid = 1,
- .size = 32,
- .arch_info = NULL,
-};
-
#ifdef ARMV7_GDB_HACKS
uint8_t armv7m_gdb_dummy_cpsr_value[] = {0, 0, 0, 0};
*/
static const struct {
unsigned id;
- char *name;
+ const char *name;
unsigned bits;
} armv7m_regs[] = {
{ ARMV7M_R0, "r0", 32 },
}
}
- if (armv7m->post_restore_context)
- armv7m->post_restore_context(target);
-
return ERROR_OK;
}
return ERROR_OK;
}
-/** Invalidates cache of core registers set up by armv7m_build_reg_cache(). */
-int armv7m_invalidate_core_regs(struct target *target)
-{
- struct armv7m_common *armv7m = target_to_armv7m(target);
- 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;
-}
-
/**
* Returns generic ARM userspace registers to GDB.
* GDB doesn't quite understand that most ARMs don't have floating point
}
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 *target, uint32_t entry_point, int timeout_ms, uint32_t exit_point, struct armv7m_common *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;
}
-/** Runs a Thumb algorithm in the target. */
-int armv7m_run_algorithm(struct target *target,
+/** 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,
- int timeout_ms, void *arch_info)
+ void *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;
- 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)
{
{
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 (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;
}
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;
- /* REVISIT speed things up (3% or so in one case) by requiring
- * algorithms to include a BKPT instruction at each exit point.
- * This eliminates overheads of adding/removing a breakpoint.
- */
+ retval = target_resume(target, 0, entry_point, 1, 1);
+
+ 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 */
- /* ARMV7M always runs in Thumb state */
- if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK)
+ 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[] */
{
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 *target)
{
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;
}
struct reg_cache *armv7m_build_reg_cache(struct target *target)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct arm *arm = &armv7m->arm;
int num_regs = ARMV7M_NUM_REGS;
struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
struct reg_cache *cache = malloc(sizeof(struct reg_cache));
struct armv7m_core_reg *arch_info = calloc(num_regs, sizeof(struct armv7m_core_reg));
int i;
- 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].arch_info = &arch_info[i];
}
+ arm->cpsr = reg_list + ARMV7M_xPSR;
+ arm->pc = reg_list + ARMV7M_PC;
+ arm->core_cache = cache;
return cache;
}
+static int armv7m_setup_semihosting(struct target *target, int enable)
+{
+ /* nothing todo for armv7m */
+ return ERROR_OK;
+}
+
/** 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;
- target->arch_info = armv7m;
+ armv7m->common_magic = ARMV7M_COMMON_MAGIC;
+
+ arm->core_type = ARM_MODE_THREAD;
+ arm->arch_info = armv7m;
+ arm->setup_semihosting = armv7m_setup_semihosting;
+
+ /* 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);
}
/** Generates a CRC32 checksum of a memory region. */
struct reg_param reg_params[2];
int retval;
+ /* 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 */
/* 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)));
- *checksum = buf_get_u32(reg_params[0].value, 0, 32);
+ 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);
+
+ 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;
}
/** Checks whether a memory region is zeroed. */
0xEA02, 0x0203, /* and r2, r2, r3 */
0x3901, /* subs r1, r1, #1 */
0xD1F9, /* bne loop */
- /* end: */
- 0xE7FE, /* b end */
+ 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;
-}
-
-/*--------------------------------------------------------------------------*/
-
-/*
- * Only stuff below this line should need to verify that its target
- * is an ARMv7-M node.
- *
- * FIXME yet none of it _does_ verify target types yet!
- */
-
-
-/*
- * Return the debug ap baseaddress in hexadecimal;
- * no extra output to simplify script processing
- */
-COMMAND_HANDLER(handle_dap_baseaddr_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- uint32_t apsel, apselsave, baseaddr;
- int retval;
-
- apselsave = swjdp->apsel;
- switch (CMD_ARGC) {
- case 0:
- apsel = swjdp->apsel;
- break;
- case 1:
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- 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
- */
-COMMAND_HANDLER(handle_dap_apid_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
-
- return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
-}
-
-COMMAND_HANDLER(handle_dap_apsel_command)
+int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found)
{
- struct target *target = get_current_target(cmd_ctx);
struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
-
- return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
-}
+ struct reg *r = armv7m->arm.pc;
+ bool result = false;
-COMMAND_HANDLER(handle_dap_memaccess_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
-}
+ /* if we halted last time due to a bkpt instruction
+ * then we have to manually step over it, otherwise
+ * the core will break again */
+ if (target->debug_reason == DBG_REASON_BREAKPOINT)
+ {
+ uint16_t op;
+ uint32_t pc = buf_get_u32(r->value, 0, 32);
-COMMAND_HANDLER(handle_dap_info_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- uint32_t apsel;
-
- switch (CMD_ARGC) {
- case 0:
- apsel = swjdp->apsel;
- break;
- case 1:
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
+ 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");
+ }
+ }
}
- return dap_info_command(cmd_ctx, swjdp, apsel);
-}
-
-/** Registers commands used to access DAP resources. */
-int armv7m_register_commands(struct command_context *cmd_ctx)
-{
- struct command *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