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 =
{
.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,
.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
};
}
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)
{
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]);
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)
ahbap_write_system_atomic_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
}
- if (jtag_reset_config & RESET_SRST_PULLS_TRST)
+ /* 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)
+ {
+ /* 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 (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;
LOG_WARNING("breakpoint already set");
return ERROR_OK;
}
-
+
if (cortex_m3->auto_bp_type)
{
breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
/* 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))
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);
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;
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);
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;
variant = args[4];
cortex_m3_init_arch_info(target, cortex_m3, chain_pos, variant);
- cortex_m3_register_commands(cmd_ctx);
return ERROR_OK;
}
projects / openocd / blobdiff