X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Farmv7m.c;h=780e81b5baf92dca1f7b5313639e04ca0acb712e;hp=05668880e5b4004b3d71e522f7b8e2c6a8a76887;hb=861df4574d351731b8651ff5cd71a6d51e491d3f;hpb=74d09617b927ed7011098d5a65087dee1ef1e87a;ds=sidebyside diff --git a/src/target/armv7m.c b/src/target/armv7m.c index 05668880e5..780e81b5ba 100644 --- a/src/target/armv7m.c +++ b/src/target/armv7m.c @@ -30,55 +30,60 @@ * ARM DDI 0405C (September 2008) * * * ***************************************************************************/ + #ifdef HAVE_CONFIG_H #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 /** Maps from enum armv7m_mode (except ARMV7M_MODE_ANY) to name. */ -char *armv7m_mode_strings[] = -{ +char *armv7m_mode_strings[] = { "Thread", "Thread (User)", "Handler", }; -static char *armv7m_exception_strings[] = -{ +static char *armv7m_exception_strings[] = { "", "Reset", "NMI", "HardFault", "MemManage", "BusFault", "UsageFault", "RESERVED", "RESERVED", "RESERVED", "RESERVED", "SVCall", "DebugMonitor", "RESERVED", "PendSV", "SysTick" }; -static uint8_t armv7m_gdb_dummy_fp_value[12] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -}; - -static reg_t armv7m_gdb_dummy_fp_reg = -{ - "GDB dummy floating-point register", armv7m_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0 +/* PSP is used in some thread modes */ +const int armv7m_psp_reg_map[17] = { + ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, + ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, + ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, + ARMV7M_R12, ARMV7M_PSP, ARMV7M_R14, ARMV7M_PC, + ARMV7M_xPSR, }; -static uint8_t armv7m_gdb_dummy_fps_value[] = {0, 0, 0, 0}; - -static 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 +/* MSP is used in handler and some thread modes */ +const int armv7m_msp_reg_map[17] = { + ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, + ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, + ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, + ARMV7M_R12, ARMV7M_MSP, ARMV7M_R14, ARMV7M_PC, + ARMV7M_xPSR, }; #ifdef ARMV7_GDB_HACKS uint8_t armv7m_gdb_dummy_cpsr_value[] = {0, 0, 0, 0}; -reg_t armv7m_gdb_dummy_cpsr_reg = -{ - "GDB dummy cpsr register", armv7m_gdb_dummy_cpsr_value, 0, 1, 32, NULL, 0, NULL, 0 +struct reg armv7m_gdb_dummy_cpsr_reg = { + .name = "GDB dummy cpsr register", + .value = armv7m_gdb_dummy_cpsr_value, + .dirty = 0, + .valid = 1, + .size = 32, + .arch_info = NULL, }; #endif @@ -92,7 +97,7 @@ reg_t armv7m_gdb_dummy_cpsr_reg = */ static const struct { unsigned id; - char *name; + const char *name; unsigned bits; } armv7m_regs[] = { { ARMV7M_R0, "r0", 32 }, @@ -125,15 +130,13 @@ static const struct { { ARMV7M_CONTROL, "control", 2 }, }; -#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs) - -static int armv7m_core_reg_arch_type = -1; +#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs) /** * 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(target_t *target) +int armv7m_restore_context(struct target *target) { int i; struct armv7m_common *armv7m = target_to_armv7m(target); @@ -143,17 +146,11 @@ int armv7m_restore_context(target_t *target) if (armv7m->pre_restore_context) armv7m->pre_restore_context(target); - for (i = ARMV7M_NUM_REGS - 1; i >= 0; i--) - { + for (i = ARMV7M_NUM_REGS - 1; i >= 0; i--) { if (armv7m->core_cache->reg_list[i].dirty) - { armv7m->write_core_reg(target, i); - } } - if (armv7m->post_restore_context) - armv7m->post_restore_context(target); - return ERROR_OK; } @@ -178,33 +175,29 @@ char *armv7m_exception_string(int number) return enamebuf; } -static int armv7m_get_core_reg(reg_t *reg) +static int armv7m_get_core_reg(struct reg *reg) { int retval; struct armv7m_core_reg *armv7m_reg = reg->arch_info; - target_t *target = armv7m_reg->target; + 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->read_core_reg(target, armv7m_reg->num); return retval; } -static int armv7m_set_core_reg(reg_t *reg, uint8_t *buf) +static int armv7m_set_core_reg(struct reg *reg, uint8_t *buf) { struct armv7m_core_reg *armv7m_reg = reg->arch_info; - target_t *target = armv7m_reg->target; + struct target *target = armv7m_reg->target; uint32_t value = buf_get_u32(buf, 0, 32); if (target->state != TARGET_HALTED) - { return ERROR_TARGET_NOT_HALTED; - } buf_set_u32(reg->value, 0, 32, value); reg->dirty = 1; @@ -213,18 +206,21 @@ static int armv7m_set_core_reg(reg_t *reg, uint8_t *buf) return ERROR_OK; } -static 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; - struct armv7m_core_reg * armv7m_core_reg; + struct armv7m_core_reg *armv7m_core_reg; struct armv7m_common *armv7m = target_to_armv7m(target); - if ((num < 0) || (num >= ARMV7M_NUM_REGS)) - return ERROR_INVALID_ARGUMENTS; + if (num >= ARMV7M_NUM_REGS) + return ERROR_COMMAND_SYNTAX_ERROR; armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info; - retval = armv7m->load_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, ®_value); + retval = armv7m->load_core_reg_u32(target, + armv7m_core_reg->type, + armv7m_core_reg->num, + ®_value); buf_set_u32(armv7m->core_cache->reg_list[num].value, 0, 32, reg_value); armv7m->core_cache->reg_list[num].valid = 1; armv7m->core_cache->reg_list[num].dirty = 0; @@ -232,60 +228,47 @@ static int armv7m_read_core_reg(struct target_s *target, int num) return retval; } -static 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; struct armv7m_core_reg *armv7m_core_reg; struct armv7m_common *armv7m = target_to_armv7m(target); - if ((num < 0) || (num >= ARMV7M_NUM_REGS)) - return ERROR_INVALID_ARGUMENTS; + if (num >= ARMV7M_NUM_REGS) + return ERROR_COMMAND_SYNTAX_ERROR; reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32); armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info; - retval = armv7m->store_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, reg_value); - if (retval != ERROR_OK) - { + retval = armv7m->store_core_reg_u32(target, + armv7m_core_reg->type, + armv7m_core_reg->num, + reg_value); + if (retval != ERROR_OK) { LOG_ERROR("JTAG failure"); armv7m->core_cache->reg_list[num].dirty = armv7m->core_cache->reg_list[num].valid; return ERROR_JTAG_DEVICE_ERROR; } - LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", num , reg_value); + LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", num, reg_value); armv7m->core_cache->reg_list[num].valid = 1; armv7m->core_cache->reg_list[num].dirty = 0; return ERROR_OK; } -/** Invalidates cache of core registers set up by armv7m_build_reg_cache(). */ -int armv7m_invalidate_core_regs(target_t *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 * 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(target_t *target, reg_t **reg_list[], int *reg_list_size) +int armv7m_get_gdb_reg_list(struct target *target, struct reg **reg_list[], int *reg_list_size) { 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: @@ -295,16 +278,11 @@ int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_ * - CPSR */ for (i = 0; i < 16; i++) - { (*reg_list)[i] = &armv7m->core_cache->reg_list[i]; - } 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 */ @@ -312,7 +290,7 @@ int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_ /* 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 @@ -320,230 +298,246 @@ int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_ 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, 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_s *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; - int i; - uint32_t context[ARMV7M_NUM_REGS]; - if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC) - { + /* 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("current target isn't an ARMV7M target"); return ERROR_TARGET_INVALID; } - if (target->state != TARGET_HALTED) - { + if (target->state != TARGET_HALTED) { LOG_WARNING("target not halted"); return ERROR_TARGET_NOT_HALTED; } - /* 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++) - { + /* refresh core register cache + * Not needed if core register cache is always consistent with target process state */ + 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++) - { - if ((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK) + for (int i = 0; i < num_mem_params; i++) { + /* TODO: Write only out params */ + retval = target_write_buffer(target, mem_params[i].address, + mem_params[i].size, + mem_params[i].value); + if (retval != ERROR_OK) return retval; } - for (i = 0; i < num_reg_params; i++) - { - reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0); -// uint32_t regvalue; + for (int i = 0; i < num_reg_params; i++) { + struct reg *reg = + register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0); +/* uint32_t regvalue; */ - if (!reg) - { + if (!reg) { LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); - exit(-1); + return ERROR_COMMAND_SYNTAX_ERROR; } - 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); + 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); + return ERROR_COMMAND_SYNTAX_ERROR; } -// regvalue = buf_get_u32(reg_params[i].value, 0, 32); +/* regvalue = buf_get_u32(reg_params[i].value, 0, 32); */ armv7m_set_core_reg(reg, reg_params[i].value); } - if (armv7m_algorithm_info->core_mode != ARMV7M_MODE_ANY) - { + if (armv7m_algorithm_info->core_mode != ARMV7M_MODE_ANY) { LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info->core_mode); buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, - 0, 1, armv7m_algorithm_info->core_mode); + 0, 1, armv7m_algorithm_info->core_mode); 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); - /* ARMV7M always runs in Thumb state */ - if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK) - { - LOG_ERROR("can't add breakpoint to finish algorithm execution"); - return ERROR_TARGET_FAILURE; - } + return retval; +} - retval = armv7m_run_and_wait(target, entry_point, timeout_ms, exit_point, armv7m); +/** 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; - breakpoint_remove(target, exit_point); + /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint + * at the exit point */ - if (retval != ERROR_OK) - { - return retval; + if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC) { + LOG_ERROR("current target isn't an ARMV7M target"); + return ERROR_TARGET_INVALID; + } + + 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) { + retval = target_halt(target); + if (retval != ERROR_OK) + return retval; + retval = target_wait_state(target, TARGET_HALTED, 500); + if (retval != ERROR_OK) + return retval; + return ERROR_TARGET_TIMEOUT; + } + + armv7m->load_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 15, &pc); + if (exit_point && (pc != exit_point)) { + 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++) - { - 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) - { + for (int i = 0; i < num_mem_params; i++) { + if (mem_params[i].direction != PARAM_OUT) { + retval = target_read_buffer(target, mem_params[i].address, + mem_params[i].size, + mem_params[i].value); + if (retval != ERROR_OK) return retval; - } + } } /* Copy core register values to reg_params[] */ - for (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); + for (int i = 0; i < num_reg_params; i++) { + if (reg_params[i].direction != PARAM_OUT) { + struct reg *reg = register_get_by_name(armv7m->core_cache, + reg_params[i].reg_name, + 0); - if (!reg) - { + if (!reg) { LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); - exit(-1); + return ERROR_COMMAND_SYNTAX_ERROR; } - 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); + 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); + return ERROR_COMMAND_SYNTAX_ERROR; } 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; } /** Logs summary of ARMv7-M state for a halted target. */ -int armv7m_arch_state(struct target_s *target) +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; } +static const struct reg_arch_type armv7m_reg_type = { + .get = armv7m_get_core_reg, + .set = armv7m_set_core_reg, +}; /** Builds cache of architecturally defined registers. */ -struct reg_cache *armv7m_build_reg_cache(target_t *target) +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)); - reg_t *reg_list = calloc(num_regs, sizeof(reg_t)); + 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"; @@ -553,8 +547,7 @@ struct reg_cache *armv7m_build_reg_cache(target_t *target) (*cache_p) = cache; armv7m->core_cache = cache; - for (i = 0; i < num_regs; i++) - { + for (i = 0; i < num_regs; i++) { arch_info[i].num = armv7m_regs[i].id; arch_info[i].target = target; arch_info[i].armv7m_common = armv7m; @@ -563,80 +556,98 @@ struct reg_cache *armv7m_build_reg_cache(target_t *target) 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; } +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(target_t *target, struct armv7m_common *armv7m) +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; + armv7m->fp_feature = FP_NONE; + + 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); } /** Generates a CRC32 checksum of a memory region. */ -int armv7m_checksum_memory(struct target_s *target, - uint32_t address, uint32_t count, uint32_t* checksum) +int armv7m_checksum_memory(struct target *target, + uint32_t address, uint32_t count, uint32_t *checksum) { - working_area_t *crc_algorithm; + struct working_area *crc_algorithm; struct armv7m_algorithm armv7m_info; 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 */ 0x460B, /* mov r3, r1 */ 0xF04F, 0x0400, /* mov r4, #0 */ 0xE013, /* b ncomp */ - /* nbyte: */ + /* nbyte: */ 0x5D11, /* ldrb r1, [r2, r4] */ 0xF8DF, 0x7028, /* ldr r7, CRC32XOR */ 0xEA80, 0x6001, /* eor r0, r0, r1, asl #24 */ 0xF04F, 0x0500, /* mov r5, #0 */ - /* loop: */ + /* loop: */ 0x2800, /* cmp r0, #0 */ 0xEA4F, 0x0640, /* mov r6, r0, asl #1 */ 0xF105, 0x0501, /* add r5, r5, #1 */ 0x4630, /* mov r0, r6 */ 0xBFB8, /* it lt */ 0xEA86, 0x0007, /* eor r0, r6, r7 */ - 0x2D08, /* cmp r5, #8 */ + 0x2D08, /* cmp r5, #8 */ 0xD1F4, /* bne loop */ 0xF104, 0x0401, /* add r4, r4, #1 */ - /* ncomp: */ + /* 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; @@ -647,56 +658,55 @@ int armv7m_checksum_memory(struct target_s *target, 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; } /** Checks whether a memory region is zeroed. */ -int armv7m_blank_check_memory(struct target_s *target, - uint32_t address, uint32_t count, uint32_t* blank) +int armv7m_blank_check_memory(struct target *target, + uint32_t address, uint32_t count, uint32_t *blank) { - working_area_t *erase_check_algorithm; + struct working_area *erase_check_algorithm; struct reg_param reg_params[3]; struct armv7m_algorithm armv7m_info; int retval; uint32_t i; - static const 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 */ + 0xBE00, /* bkpt #0 */ }; /* make sure we have a working area */ - if (target_alloc_working_area(target, sizeof(erase_check_code), &erase_check_algorithm) != ERROR_OK) - { + 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(uint16_t)); i++) - target_write_u16(target, erase_check_algorithm->address + i*sizeof(uint16_t), erase_check_code[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; armv7m_info.core_mode = ARMV7M_MODE_ANY; @@ -710,17 +720,18 @@ int armv7m_blank_check_memory(struct target_s *target, 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]); @@ -728,137 +739,49 @@ int armv7m_blank_check_memory(struct target_s *target, 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) -{ - target_t *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 (argc) { - case 0: - apsel = swjdp->apsel; - break; - case 1: - COMMAND_PARSE_NUMBER(u32, args[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) +int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found) { - target_t *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) -{ - target_t *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); -} - -COMMAND_HANDLER(handle_dap_memaccess_command) -{ - target_t *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); -} - - -COMMAND_HANDLER(handle_dap_info_command) -{ - target_t *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 (argc) { - case 0: - apsel = swjdp->apsel; - break; - case 1: - COMMAND_PARSE_NUMBER(u32, args[0], apsel); - break; - default: - return ERROR_COMMAND_SYNTAX_ERROR; + struct reg *r = armv7m->arm.pc; + bool result = false; + + + /* 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); + + 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_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 +};