X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Farmv7m.c;h=d9e63d7f31bef568f45348150a36f5d847118c1a;hp=1bf6929769718a398267142054a9840f9d640440;hb=8c6b95ed162ada54b1165ca0c9b46aa92f92975c;hpb=40580e2d71ac56131a5da7e5f67a0b63450e4f24 diff --git a/src/target/armv7m.c b/src/target/armv7m.c index 1bf6929769..d9e63d7f31 100644 --- a/src/target/armv7m.c +++ b/src/target/armv7m.c @@ -8,7 +8,7 @@ * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * * * - * Copyright (C) 2007,2008 Øyvind Harboe * + * Copyright (C) 2007,2008 Øyvind Harboe * * oyvind.harboe@zylin.com * * * * This program is free software; you can redistribute it and/or modify * @@ -25,118 +25,113 @@ * along with this program; if not, write to the * * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + * * + * ARMv7-M Architecture, Application Level Reference Manual * + * ARM DDI 0405C (September 2008) * + * * ***************************************************************************/ #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include "replacements.h" - +#include "breakpoints.h" #include "armv7m.h" +#include "algorithm.h" #include "register.h" -#include "target.h" -#include "log.h" -#include "jtag.h" -#include "arm_jtag.h" -#include -#include #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", }; -char* armv7m_exception_strings[] = +static char *armv7m_exception_strings[] = { - "", "Reset", "NMI", "HardFault", "MemManage", "BusFault", "UsageFault", "RESERVED", "RESERVED", "RESERVED", "RESERVED", - "SVCall", "DebugMonitor", "RESERVED", "PendSV", "SysTick" -}; - -char* armv7m_core_reg_list[] = -{ - /* Registers accessed through core debug */ - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", - "sp", "lr", "pc", - "xPSR", "msp", "psp", - /* Registers accessed through special reg 20 */ - "primask", "basepri", "faultmask", "control" -}; - -u8 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 -}; - -u8 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 + "", "Reset", "NMI", "HardFault", + "MemManage", "BusFault", "UsageFault", "RESERVED", + "RESERVED", "RESERVED", "RESERVED", "SVCall", + "DebugMonitor", "RESERVED", "PendSV", "SysTick" }; #ifdef ARMV7_GDB_HACKS -u8 armv7m_gdb_dummy_cpsr_value[] = {0, 0, 0, 0}; +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 -armv7m_core_reg_t armv7m_core_reg_list_arch_info[] = -{ - /* CORE_GP are accesible using the core debug registers */ - {0, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {1, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {2, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {3, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {4, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {5, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {6, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {7, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {8, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {9, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {10, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {11, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {12, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {13, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {14, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - {15, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, - - {16, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* xPSR */ - {17, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* MSP */ - {18, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* PSP */ - - /* CORE_SP are accesible using coreregister 20 */ - {19, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* PRIMASK */ - {20, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* BASEPRI */ - {21, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* FAULTMASK */ - {22, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL} /* CONTROL */ +/* + * 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; + const char *name; + unsigned bits; +} armv7m_regs[] = { + { ARMV7M_R0, "r0", 32 }, + { ARMV7M_R1, "r1", 32 }, + { ARMV7M_R2, "r2", 32 }, + { ARMV7M_R3, "r3", 32 }, + + { ARMV7M_R4, "r4", 32 }, + { ARMV7M_R5, "r5", 32 }, + { ARMV7M_R6, "r6", 32 }, + { ARMV7M_R7, "r7", 32 }, + + { ARMV7M_R8, "r8", 32 }, + { ARMV7M_R9, "r9", 32 }, + { ARMV7M_R10, "r10", 32 }, + { ARMV7M_R11, "r11", 32 }, + + { ARMV7M_R12, "r12", 32 }, + { ARMV7M_R13, "sp", 32 }, + { ARMV7M_R14, "lr", 32 }, + { ARMV7M_PC, "pc", 32 }, + + { ARMV7M_xPSR, "xPSR", 32 }, + { ARMV7M_MSP, "msp", 32 }, + { ARMV7M_PSP, "psp", 32 }, + + { ARMV7M_PRIMASK, "primask", 1 }, + { ARMV7M_BASEPRI, "basepri", 8 }, + { ARMV7M_FAULTMASK, "faultmask", 1 }, + { ARMV7M_CONTROL, "control", 2 }, }; -int armv7m_core_reg_arch_type = -1; -int armv7m_dummy_core_reg_arch_type = -1; +#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs) -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->pre_restore_context) armv7m->pre_restore_context(target); - for (i = ARMV7NUMCOREREGS-1; i >= 0; i--) + for (i = ARMV7M_NUM_REGS - 1; i >= 0; i--) { if (armv7m->core_cache->reg_list[i].dirty) { @@ -144,13 +139,18 @@ int armv7m_restore_context(target_t *target) } } - 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]; @@ -163,28 +163,28 @@ char *armv7m_exception_string(int number) 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, u8 *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; - u32 value = buf_get_u32(buf, 0, 32); + 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) { @@ -198,16 +198,14 @@ int armv7m_set_core_reg(reg_t *reg, u8 *buf) 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) { - u32 reg_value; + uint32_t reg_value; int retval; - 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 >= ARMV7NUMCOREREGS)) + if (num >= ARMV7M_NUM_REGS) return ERROR_INVALID_ARGUMENTS; armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info; @@ -219,16 +217,14 @@ int armv7m_read_core_reg(struct target_s *target, int num) 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; - u32 reg_value; - armv7m_core_reg_t *armv7m_core_reg; - - /* get pointers to arch-specific information */ - armv7m_common_t *armv7m = target->arch_info; + uint32_t reg_value; + struct armv7m_core_reg *armv7m_core_reg; + struct armv7m_common *armv7m = target_to_armv7m(target); - if ((num < 0) || (num >= ARMV7NUMCOREREGS)) + if (num >= ARMV7M_NUM_REGS) return ERROR_INVALID_ARGUMENTS; reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32); @@ -240,48 +236,42 @@ int armv7m_write_core_reg(struct target_s *target, int num) 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%x", 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; } -int armv7m_invalidate_core_regs(target_t *target) +/** + * 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; - 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) -{ - /* 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: + * - the first 16 registers are r0..r15 + * - (obsolete) 8 FPA registers + * - (obsolete) FPA status + * - 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 */ @@ -289,7 +279,7 @@ 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 */ - armv7m->core_cache->reg_list[15].value[0] |= 1; + *((char*)armv7m->arm.pc->value) |= 1; #else (*reg_list)[25] = &armv7m->core_cache->reg_list[ARMV7M_xPSR]; #endif @@ -297,50 +287,45 @@ 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, u32 entry_point, int timeout_ms, u32 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) { - u32 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%x ", 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, u32 entry_point, u32 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; - u32 context[ARMV7NUMCOREREGS]; + + /* 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) { @@ -356,152 +341,193 @@ int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_ /* refresh core register cache */ /* Not needed if core register cache is always consistent with target process state */ - for (i = 0; i < ARMV7NUMCOREREGS; 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++) { - if ((retval=target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value))!=ERROR_OK) + // 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); - u32 regvalue; + 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); +// 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) { 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); + buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, + 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; + + 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; - /* ARMV7M always runs in Thumb state */ - if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK) + /* 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) + if ((retval = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK) { return retval; } } /* 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 = ARMV7NUMCOREREGS-1; i >= 0; i--) + for (int i = ARMV7M_NUM_REGS - 1; i >= 0; i--) { - u32 regvalue; + 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%8.8x", armv7m->core_cache->reg_list[i].name, context[i]); - buf_set_u32(armv7m->core_cache->reg_list[i].value, 0, 32, context[i]); + LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32, + armv7m->core_cache->reg_list[i].name, armv7m_algorithm_info->context[i]); + buf_set_u32(armv7m->core_cache->reg_list[i].value, + 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; - LOG_USER("target halted due to %s, current mode: %s %s\nxPSR: 0x%8.8x pc: 0x%8.8x", - Jim_Nvp_value2name_simple( nvp_target_debug_reason,target->debug_reason)->name, + 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 "%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[15].value, 0, 32)); + buf_get_u32(arm->cpsr->value, 0, 32), + buf_get_u32(arm->pc->value, 0, 32), + (ctrl & 0x02) ? 'p' : 'm', + 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; - - int num_regs = ARMV7NUMCOREREGS; - 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 = malloc(sizeof(reg_t) * num_regs); - armv7m_core_reg_t *arch_info = malloc(sizeof(armv7m_core_reg_t) * num_regs); + 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 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"; @@ -513,54 +539,62 @@ reg_cache_t *armv7m_build_reg_cache(target_t *target) for (i = 0; i < num_regs; i++) { - arch_info[i] = armv7m_core_reg_list_arch_info[i]; + arch_info[i].num = armv7m_regs[i].id; arch_info[i].target = target; arch_info[i].armv7m_common = armv7m; - reg_list[i].name = armv7m_core_reg_list[i]; - reg_list[i].size = 32; + reg_list[i].name = armv7m_regs[i].name; + reg_list[i].size = armv7m_regs[i].bits; 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; - target->arch_info = armv7m; + 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; -} - -int armv7m_register_commands(struct command_context_s *cmd_ctx) -{ - return ERROR_OK; + return arm_init_arch_info(target, arm); } -int armv7m_checksum_memory(struct target_s *target, u32 address, u32 count, u32* 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; - u16 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 */ @@ -586,24 +620,22 @@ int armv7m_checksum_memory(struct target_s *target, u32 address, u32 count, u32* /* ncomp: */ 0x429C, /* cmp r4, r3 */ 0xD1E9, /* bne nbyte */ - /* end: */ - 0xE7FE, /* b end */ + 0xBE00, /* bkpt #0 */ 0x1DB7, 0x04C1 /* CRC32XOR: .word 0x04C11DB7 */ }; - u32 i; + 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(u16)); i++) - if((retval = target_write_u16(target, crc_algorithm->address + i*sizeof(u16), 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; @@ -614,43 +646,44 @@ int armv7m_checksum_memory(struct target_s *target, u32 address, u32 count, u32* buf_set_u32(reg_params[0].value, 0, 32, address); buf_set_u32(reg_params[1].value, 0, 32, count); - if ((retval = target->type->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, u32 address, u32 count, u32* 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; - u32 i; + uint32_t i; - u16 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 */ @@ -660,8 +693,8 @@ int armv7m_blank_check_memory(struct target_s *target, u32 address, u32 count, u } /* convert flash writing code into a buffer in target endianness */ - for (i = 0; i < (sizeof(erase_check_code)/sizeof(u16)); i++) - target_write_u16(target, erase_check_algorithm->address + i*sizeof(u16), 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; @@ -675,17 +708,12 @@ int armv7m_blank_check_memory(struct target_s *target, u32 address, u32 count, u init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT); buf_set_u32(reg_params[2].value, 0, 32, 0xff); - if ((retval = target->type->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]); @@ -693,5 +721,53 @@ int armv7m_blank_check_memory(struct target_s *target, u32 address, u32 count, u target_free_working_area(target, erase_check_algorithm); + return retval; +} + +int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found) +{ + struct armv7m_common *armv7m = target_to_armv7m(target); + 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"); + } + } + } + + 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 +};