X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m3.c;h=e3ed4cfbb81dcbaf0875246844241b99b6364b41;hp=653ebab09782423d2ccc1128bf622e9a973c61c3;hb=dfbb9f3e89ae;hpb=9c3dec377eb6eb822b85fa107ade2a62c9e1cfd1 diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c index 653ebab097..e3ed4cfbb8 100644 --- a/src/target/cortex_m3.c +++ b/src/target/cortex_m3.c @@ -51,6 +51,12 @@ int cortex_m3_quit(); int cortex_m3_load_core_reg_u32(target_t *target, enum armv7m_regtype type, u32 num, u32 *value); int cortex_m3_store_core_reg_u32(target_t *target, enum armv7m_regtype type, u32 num, u32 value); int cortex_m3_target_request_data(target_t *target, u32 size, u8 *buffer); +int cortex_m3_examine(struct command_context_s *cmd_ctx, struct target_s *target); + +#ifdef ARMV7_GDB_HACKS +extern u8 armv7m_gdb_dummy_cpsr_value[]; +extern reg_t armv7m_gdb_dummy_cpsr_reg; +#endif target_type_t cortexm3_target = { @@ -75,6 +81,7 @@ target_type_t cortexm3_target = .write_memory = cortex_m3_write_memory, .bulk_write_memory = cortex_m3_bulk_write_memory, .checksum_memory = armv7m_checksum_memory, + .blank_check_memory = armv7m_blank_check_memory, .run_algorithm = armv7m_run_algorithm, @@ -86,6 +93,7 @@ target_type_t cortexm3_target = .register_commands = cortex_m3_register_commands, .target_command = cortex_m3_target_command, .init_target = cortex_m3_init_target, + .examine = cortex_m3_examine, .quit = cortex_m3_quit }; @@ -311,7 +319,15 @@ int cortex_m3_debug_entry(target_t *target) } xPSR = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32); - + +#ifdef ARMV7_GDB_HACKS + /* copy real xpsr reg for gdb, setting thumb bit */ + buf_set_u32(armv7m_gdb_dummy_cpsr_value, 0, 32, xPSR); + buf_set_u32(armv7m_gdb_dummy_cpsr_value, 5, 1, 1); + armv7m_gdb_dummy_cpsr_reg.valid = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid; + armv7m_gdb_dummy_cpsr_reg.dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty; +#endif + /* For IT instructions xPSR must be reloaded on resume and clear on debug exec */ if (xPSR & 0xf00) { @@ -658,6 +674,7 @@ int cortex_m3_assert_reset(target_t *target) armv7m_common_t *armv7m = target->arch_info; cortex_m3_common_t *cortex_m3 = armv7m->arch_info; swjdp_common_t *swjdp = &cortex_m3->swjdp_info; + int assert_srst = 1; LOG_DEBUG("target->state: %s", target_state_strings[target->state]); @@ -674,7 +691,7 @@ int cortex_m3_assert_reset(target_t *target) ahbap_write_system_u32(swjdp, DCB_DCRDR, 0 ); - if (target->reset_mode == RESET_RUN) + if (!target->reset_halt) { /* Set/Clear C_MASKINTS in a separate operation */ if (cortex_m3->dcb_dhcsr & C_MASKINTS) @@ -691,21 +708,53 @@ int cortex_m3_assert_reset(target_t *target) ahbap_write_system_atomic_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET ); } - if (target->state == TARGET_HALTED || target->state == TARGET_UNKNOWN) + /* following hack is to handle luminary reset + * when srst is asserted the luminary device seesm to also clear the debug registers + * which does not match the armv7 debug TRM */ + + if (strcmp(cortex_m3->variant, "lm3s") == 0) { - /* assert SRST and TRST */ - /* system would get ouf sync if we didn't reset test-logic, too */ - jtag_add_reset(1, 1); - jtag_add_sleep(5000); + /* get revision of lm3s target, only early silicon has this issue + * Fury Rev B, DustDevil Rev B, Tempest all ok */ + + u32 did0; + + if (target_read_u32(target, 0x400fe000, &did0) == ERROR_OK) + { + switch ((did0 >> 16) & 0xff) + { + case 0: + /* all Sandstorm suffer issue */ + assert_srst = 0; + break; + + case 1: + case 3: + /* only Fury/DustDevil rev A suffer reset problems */ + if (((did0 >> 8) & 0xff) == 0) + assert_srst = 0; + break; + } + } } - - if (jtag_reset_config & RESET_SRST_PULLS_TRST) + + if (assert_srst) { - jtag_add_reset(1, 1); + /* default to asserting srst */ + if (jtag_reset_config & RESET_SRST_PULLS_TRST) + { + jtag_add_reset(1, 1); + } + else + { + jtag_add_reset(0, 1); + } } else { - jtag_add_reset(0, 1); + /* this causes the luminary device to reset using the watchdog */ + ahbap_write_system_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ ); + LOG_DEBUG("Using Luminary Reset: SYSRESETREQ"); } target->state = TARGET_RESET; @@ -755,7 +804,7 @@ int cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint) LOG_WARNING("breakpoint already set"); return ERROR_OK; } - + if (cortex_m3->auto_bp_type) { breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT; @@ -837,10 +886,18 @@ int cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint) /* get pointers to arch-specific information */ armv7m_common_t *armv7m = target->arch_info; cortex_m3_common_t *cortex_m3 = armv7m->arch_info; - + if (cortex_m3->auto_bp_type) { breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT; +#ifdef ARMV7_GDB_HACKS + if (breakpoint->length != 2) { + /* XXX Hack: Replace all breakpoints with length != 2 with + * a hardware breakpoint. */ + breakpoint->type = BKPT_HARD; + breakpoint->length = 2; + } +#endif } if ((breakpoint->type == BKPT_HARD) && (breakpoint->address >= 0x20000000)) @@ -1111,6 +1168,17 @@ int cortex_m3_store_core_reg_u32(struct target_s *target, enum armv7m_regtype ty cortex_m3_common_t *cortex_m3 = armv7m->arch_info; swjdp_common_t *swjdp = &cortex_m3->swjdp_info; +#ifdef ARMV7_GDB_HACKS + /* If the LR register is being modified, make sure it will put us + * in "thumb" mode, or an INVSTATE exception will occur. This is a + * hack to deal with the fact that gdb will sometimes "forge" + * return addresses, and doesn't set the LSB correctly (i.e., when + * printing expressions containing function calls, it sets LR=0.) */ + + if (num == 14) + value |= 0x01; +#endif + if ((type == ARMV7M_REGISTER_CORE_GP) && (num <= ARMV7M_PSP)) { retval = ahbap_write_coreregister_u32(swjdp, value, num); @@ -1235,6 +1303,13 @@ void cortex_m3_build_reg_cache(target_t *target) int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target) { + cortex_m3_build_reg_cache(target); + return ERROR_OK; +} + +int cortex_m3_examine(struct command_context_s *cmd_ctx, struct target_s *target) +{ + int retval; u32 cpuid, fpcr, dwtcr, ictr; int i; @@ -1242,12 +1317,16 @@ int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *ta armv7m_common_t *armv7m = target->arch_info; cortex_m3_common_t *cortex_m3 = armv7m->arch_info; swjdp_common_t *swjdp = &cortex_m3->swjdp_info; + + target->type->examined = 1; - cortex_m3_build_reg_cache(target); - ahbap_debugport_init(swjdp); + if ((retval=ahbap_debugport_init(swjdp))!=ERROR_OK) + return retval; /* Read from Device Identification Registers */ - target_read_u32(target, CPUID, &cpuid); + if ((retval=target_read_u32(target, CPUID, &cpuid))!=ERROR_OK) + return retval; + if (((cpuid >> 4) & 0xc3f) == 0xc23) LOG_DEBUG("CORTEX-M3 processor detected"); LOG_DEBUG("cpuid: 0x%8.8x", cpuid); @@ -1336,6 +1415,8 @@ int cortex_m3_target_request_data(target_t *target, u32 size, u8 *buffer) int cortex_m3_handle_target_request(void *priv) { target_t *target = priv; + if (!target->type->examined) + return ERROR_OK; armv7m_common_t *armv7m = target->arch_info; cortex_m3_common_t *cortex_m3 = armv7m->arch_info; swjdp_common_t *swjdp = &cortex_m3->swjdp_info; @@ -1398,6 +1479,15 @@ int cortex_m3_init_arch_info(target_t *target, cortex_m3_common_t *cortex_m3, in armv7m->pre_restore_context = NULL; armv7m->post_restore_context = NULL; + if (variant) + { + cortex_m3->variant = strdup(variant); + } + else + { + cortex_m3->variant = strdup(""); + } + armv7m_init_arch_info(target, armv7m); armv7m->arch_info = cortex_m3; armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32; @@ -1428,7 +1518,6 @@ int cortex_m3_target_command(struct command_context_s *cmd_ctx, char *cmd, char variant = args[4]; cortex_m3_init_arch_info(target, cortex_m3, chain_pos, variant); - cortex_m3_register_commands(cmd_ctx); return ERROR_OK; }