X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Farmv7m.c;h=75a2fb9e3b3b12607fbf2153d9c291ecc84b865e;hp=3f162f5824b0eb06a18705e4e38d92e5a328c7e1;hb=6a2fd7cad507ef24a7dc4ce3c5f8b5351dd12656;hpb=84df52f9ea78e2d71bde648a16b69d80404c6421 diff --git a/src/target/armv7m.c b/src/target/armv7m.c index 3f162f5824..75a2fb9e3b 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 * @@ -25,6 +25,10 @@ * 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" @@ -32,6 +36,8 @@ #include "armv7m.h" +#define ARRAY_SIZE(x) ((int)(sizeof(x)/sizeof((x)[0]))) + #if 0 #define _DEBUG_INSTRUCTION_EXECUTION_ @@ -42,20 +48,12 @@ char* armv7m_mode_strings[] = "Thread", "Thread (User)", "Handler", }; -char* armv7m_exception_strings[] = -{ - "", "Reset", "NMI", "HardFault", "MemManage", "BusFault", "UsageFault", "RESERVED", "RESERVED", "RESERVED", "RESERVED", - "SVCall", "DebugMonitor", "RESERVED", "PendSV", "SysTick" -}; - -char* armv7m_core_reg_list[] = +static char *armv7m_exception_strings[] = { - /* 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" + "", "Reset", "NMI", "HardFault", + "MemManage", "BusFault", "UsageFault", "RESERVED", + "RESERVED", "RESERVED", "RESERVED", "SVCall", + "DebugMonitor", "RESERVED", "PendSV", "SysTick" }; uint8_t armv7m_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; @@ -81,37 +79,48 @@ reg_t armv7m_gdb_dummy_cpsr_reg = }; #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. + */ +static const struct { + unsigned id; + 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 }, }; +#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs) + int armv7m_core_reg_arch_type = -1; int armv7m_dummy_core_reg_arch_type = -1; @@ -127,7 +136,7 @@ int armv7m_restore_context(target_t *target) 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) { @@ -198,7 +207,7 @@ int armv7m_read_core_reg(struct target_s *target, int num) /* get pointers to arch-specific information */ armv7m_common_t *armv7m = target->arch_info; - if ((num < 0) || (num >= ARMV7NUMCOREREGS)) + if ((num < 0) || (num >= ARMV7M_NUM_REGS)) return ERROR_INVALID_ARGUMENTS; armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info; @@ -219,7 +228,7 @@ int armv7m_write_core_reg(struct target_s *target, int num) /* get pointers to arch-specific information */ armv7m_common_t *armv7m = target->arch_info; - if ((num < 0) || (num >= ARMV7NUMCOREREGS)) + if ((num < 0) || (num >= ARMV7M_NUM_REGS)) return ERROR_INVALID_ARGUMENTS; reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32); @@ -262,6 +271,13 @@ int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_ *reg_list_size = 26; *reg_list = malloc(sizeof(reg_t*) * (*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]; @@ -331,7 +347,7 @@ int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_ enum armv7m_mode core_mode = armv7m->core_mode; int retval = ERROR_OK; int i; - uint32_t context[ARMV7NUMCOREREGS]; + uint32_t context[ARMV7M_NUM_REGS]; if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC) { @@ -347,7 +363,7 @@ 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 (i = 0; i < ARMV7M_NUM_REGS; i++) { if (!armv7m->core_cache->reg_list[i].valid) armv7m->read_core_reg(target, i); @@ -384,7 +400,8 @@ int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_ 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; } @@ -438,14 +455,16 @@ int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_ } } - for (i = ARMV7NUMCOREREGS-1; i >= 0; i--) + for (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]) { - LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32 "", 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, context[i]); + buf_set_u32(armv7m->core_cache->reg_list[i].value, + 0, 32, context[i]); armv7m->core_cache->reg_list[i].valid = 1; armv7m->core_cache->reg_list[i].dirty = 1; } @@ -460,13 +479,21 @@ int armv7m_arch_state(struct target_s *target) { /* get pointers to arch-specific information */ armv7m_common_t *armv7m = target->arch_info; + uint32_t ctrl, sp; - LOG_USER("target halted due to %s, current mode: %s %s\nxPSR: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "", - 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, + Jim_Nvp_value2name_simple(nvp_target_debug_reason, + target->debug_reason)->name, 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(armv7m->core_cache->reg_list[ARMV7M_PC].value, 0, 32), + (ctrl & 0x02) ? 'p' : 'm', + sp); return ERROR_OK; } @@ -476,11 +503,11 @@ reg_cache_t *armv7m_build_reg_cache(target_t *target) /* get pointers to arch-specific information */ armv7m_common_t *armv7m = target->arch_info; - int num_regs = ARMV7NUMCOREREGS; + 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 = malloc(sizeof(reg_t) * num_regs); - armv7m_core_reg_t *arch_info = malloc(sizeof(armv7m_core_reg_t) * num_regs); + reg_t *reg_list = calloc(num_regs, sizeof(reg_t)); + armv7m_core_reg_t *arch_info = calloc(num_regs, sizeof(armv7m_core_reg_t)); int i; if (armv7m_core_reg_arch_type == -1) @@ -504,11 +531,11 @@ 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; @@ -539,20 +566,6 @@ int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m) return ERROR_OK; } -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]"); - - return ERROR_OK; -} - int armv7m_checksum_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* checksum) { working_area_t *crc_algorithm; @@ -560,7 +573,7 @@ int armv7m_checksum_memory(struct target_s *target, uint32_t address, uint32_t c reg_param_t reg_params[2]; int retval; - uint16_t cortex_m3_crc_code[] = { + static const uint16_t cortex_m3_crc_code[] = { 0x4602, /* mov r2, r0 */ 0xF04F, 0x30FF, /* mov r0, #0xffffffff */ 0x460B, /* mov r3, r1 */ @@ -642,11 +655,11 @@ int armv7m_blank_check_memory(struct target_s *target, uint32_t address, uint32_ 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 */ + 0xF810, 0x3B01, /* ldrb r3, [r0], #1 */ + 0xEA02, 0x0203, /* and r2, r2, r3 */ 0x3901, /* subs r1, r1, #1 */ 0xD1F9, /* bne loop */ /* end: */ @@ -696,10 +709,12 @@ int armv7m_blank_check_memory(struct target_s *target, uint32_t address, uint32_ return ERROR_OK; } -/******************************************************************************************************************** -* Return the debug ap baseaddress in hexadecimal, no extra output to simplify script processing -*********************************************************************************************************************/ -int handle_dap_baseaddr_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +/* + * 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; @@ -710,7 +725,7 @@ int handle_dap_baseaddr_command(struct command_context_s *cmd_ctx, char *cmd, ch apsel = swjdp->apsel; apselsave = swjdp->apsel; if (argc > 0) - { + { apsel = strtoul(args[0], NULL, 0); } if (apselsave != apsel) @@ -731,97 +746,83 @@ int handle_dap_baseaddr_command(struct command_context_s *cmd_ctx, char *cmd, ch } -/******************************************************************************************************************** -* 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) +/* + * 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) { 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, apid; - 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, 0xFC, &apid); - retval = swjdp_transaction_endcheck(swjdp); - command_print(cmd_ctx, "0x%8.8" PRIx32 "", apid); - if (apselsave != apsel) - { - dap_ap_select(swjdp, apselsave); - } - - return retval; + return dap_apid_command(cmd_ctx, swjdp, args, argc); } -int handle_dap_apsel_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int 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; - uint32_t apsel, apid; - int retval; - apsel = 0; - if (argc > 0) - { - apsel = strtoul(args[0], NULL, 0); - } - - dap_ap_select(swjdp, apsel); - dap_ap_read_reg_u32(swjdp, 0xFC, &apid); - retval = swjdp_transaction_endcheck(swjdp); - command_print(cmd_ctx, "ap %i selected, identification register 0x%8.8" PRIx32 "", (int)apsel, apid); - - return retval; + return dap_apsel_command(cmd_ctx, swjdp, args, argc); } -int handle_dap_memaccess_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int 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; - uint32_t memaccess_tck; - - memaccess_tck = swjdp->memaccess_tck; - if (argc > 0) - { - memaccess_tck = strtoul(args[0], NULL, 0); - } - swjdp->memaccess_tck = memaccess_tck; - command_print(cmd_ctx, "memory bus access delay set to %i tck", (int)(swjdp->memaccess_tck)); - - return ERROR_OK; + return dap_memaccess_command(cmd_ctx, swjdp, args, argc); } -int handle_dap_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int 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; - int retval; uint32_t apsel; apsel = swjdp->apsel; if (argc > 0) - { apsel = strtoul(args[0], NULL, 0); - } - - retval = dap_info_command(cmd_ctx, swjdp, apsel); - return retval; + return dap_info_command(cmd_ctx, swjdp, apsel); } +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]"); + + return ERROR_OK; +}