/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
+ * *
* Copyright (C) 2006 by Magnus Lundin *
* lundin@mlu.mine.nu *
* *
#include "config.h"
#endif
-#define USE_SP_REGS
-
#include "replacements.h"
#include "cortex_m3.h"
#include "register.h"
#include "target.h"
+#include "target_request.h"
#include "log.h"
#include "jtag.h"
#include "arm_jtag.h"
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);
+
target_type_t cortexm3_target =
{
.name = "cortex_m3",
.poll = cortex_m3_poll,
.arch_state = armv7m_arch_state,
+ .target_request_data = cortex_m3_target_request_data,
+
.halt = cortex_m3_halt,
.resume = cortex_m3_resume,
.step = cortex_m3_step,
.read_memory = cortex_m3_read_memory,
.write_memory = cortex_m3_write_memory,
.bulk_write_memory = cortex_m3_bulk_write_memory,
-
+ .checksum_memory = armv7m_checksum_memory,
+
.run_algorithm = armv7m_run_algorithm,
.add_breakpoint = cortex_m3_add_breakpoint,
ahbap_write_system_u32(swjdp, 0x20000000, opcode);
ahbap_write_coreregister_u32(swjdp, 0x20000000, 15);
cortex_m3_single_step_core(target);
- armv7m->core_cache->reg_list[15].dirty = 1;
+ armv7m->core_cache->reg_list[15].dirty = armv7m->core_cache->reg_list[15].valid;
retvalue = ahbap_write_system_atomic_u32(swjdp, 0x20000000, savedram);
return retvalue;
}
+#if 0
/* Enable interrupts */
int cortex_m3_cpsie(target_t *target, u32 IF)
{
{
return cortex_m3_exec_opcode(target, ARMV7M_T_CPSID(IF), 2);
}
+#endif
int cortex_m3_endreset_event(target_t *target)
{
int i;
+ u32 dcb_demcr;
/* get pointers to arch-specific information */
armv7m_common_t *armv7m = target->arch_info;
cortex_m3_fp_comparator_t *fp_list = cortex_m3->fp_comparator_list;
cortex_m3_dwt_comparator_t *dwt_list = cortex_m3->dwt_comparator_list;
- DEBUG(" ");
+ ahbap_read_system_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr);
+ DEBUG("DCB_DEMCR = 0x%8.8x",dcb_demcr);
+
+ ahbap_write_system_u32(swjdp, DCB_DCRDR, 0 );
+
/* Enable debug requests */
ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN))
ahbap_write_system_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN );
/* Enable trace and dwt */
- ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
+ ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR );
/* Monitor bus faults */
ahbap_write_system_u32(swjdp, NVIC_SHCSR, SHCSR_BUSFAULTENA );
target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x4, dwt_list[i].mask);
target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x8, dwt_list[i].function);
}
+ swjdp_transaction_endcheck(swjdp);
/* Make sure working_areas are all free */
target_free_all_working_areas(target);
/* get pointers to arch-specific information */
armv7m_common_t *armv7m = target->arch_info;
cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
/* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */
/* only check the debug reason if we don't know it already */
if ((target->debug_reason != DBG_REASON_DBGRQ)
&& (target->debug_reason != DBG_REASON_SINGLESTEP))
{
+ /* INCOMPLETE */
- /* INCOPMPLETE */
-
- if (cortex_m3->nvic_dfsr & 0x2)
+ if (cortex_m3->nvic_dfsr & DFSR_BKPT)
{
target->debug_reason = DBG_REASON_BREAKPOINT;
- if (cortex_m3->nvic_dfsr & 0x4)
+ if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP)
target->debug_reason = DBG_REASON_WPTANDBKPT;
}
- else if (cortex_m3->nvic_dfsr & 0x4)
+ else if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP)
target->debug_reason = DBG_REASON_WATCHPOINT;
}
int cortex_m3_debug_entry(target_t *target)
{
- int i, irq_is_pending;
+ int i;
u32 xPSR;
int retval;
/* For IT instructions xPSR must be reloaded on resume and clear on debug exec*/
if (xPSR & 0xf00)
{
- armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = 1;
+ armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid;
cortex_m3_store_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 16, xPSR &~ 0xff);
}
-
/* Now we can load SP core registers */
-#ifdef USE_SP_REGS
for (i = ARMV7M_PRIMASK; i < ARMV7NUMCOREREGS; i++)
{
if (!armv7m->core_cache->reg_list[i].valid)
armv7m->read_core_reg(target, i);
}
-#endif
/* Are we in an exception handler */
armv7m->core_mode = (xPSR & 0x1FF) ? ARMV7M_MODE_HANDLER : ARMV7M_MODE_THREAD;
return ERROR_OK;
}
-int cortex_m3_restore_context(target_t *target)
-{
- int i;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-
- DEBUG(" ");
-
- if (armv7m->pre_restore_context)
- armv7m->pre_restore_context(target);
-
-#ifdef USE_SP_REGS
- for (i = ARMV7NUMCOREREGS; i >= 0; i--)
-#else
- for (i = ARMV7M_PSP; i >= 0; i--)
-#endif
- {
- 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;
-}
-
-enum target_state cortex_m3_poll(target_t *target)
+int cortex_m3_poll(target_t *target)
{
int retval;
u32 prev_target_state = target->state;
if (retval != ERROR_OK)
{
target->state = TARGET_UNKNOWN;
- return TARGET_UNKNOWN;
+ return retval;
}
if (cortex_m3->dcb_dhcsr & S_RESET_ST)
{
- target->state = TARGET_RESET;
- return target->state;
+ /* check if still in reset */
+ ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+
+ if (cortex_m3->dcb_dhcsr & S_RESET_ST)
+ {
+ target->state = TARGET_RESET;
+ return ERROR_OK;
+ }
}
- else if (target->state == TARGET_RESET)
+
+ if (target->state == TARGET_RESET)
{
/* Cannot switch context while running so endreset is called with target->state == TARGET_RESET */
DEBUG("Exit from reset with dcb_dhcsr 0x%x", cortex_m3->dcb_dhcsr);
/* Read Debug Fault Status Register, added to figure out the lockup when running flashtest.script */
ahbap_read_system_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
DEBUG("dcb_dhcsr 0x%x, nvic_dfsr 0x%x, target->state: %s", cortex_m3->dcb_dhcsr, cortex_m3->nvic_dfsr, target_state_strings[target->state]);
- return target->state;
+ return ERROR_OK;
}
int cortex_m3_halt(target_t *target)
DEBUG("target->state: %s", target_state_strings[target->state]);
+ if (target->state == TARGET_HALTED)
+ {
+ WARNING("target was already halted");
+ return ERROR_OK;
+ }
+
+ if (target->state == TARGET_UNKNOWN)
+ {
+ WARNING("target was in unknown state when halt was requested");
+ }
+
+ if (target->state == TARGET_RESET)
+ {
+ if ((jtag_reset_config & RESET_SRST_PULLS_TRST) && jtag_srst)
+ {
+ ERROR("can't request a halt while in reset if nSRST pulls nTRST");
+ return ERROR_TARGET_FAILURE;
+ }
+ else
+ {
+ /* we came here in a reset_halt or reset_init sequence
+ * debug entry was already prepared in cortex_m3_prepare_reset_halt()
+ */
+ target->debug_reason = DBG_REASON_DBGRQ;
+
+ return ERROR_OK;
+ }
+ }
+
/* Write to Debug Halting Control and Status Register */
ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT );
armv7m_common_t *armv7m = target->arch_info;
cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
-
+ u32 dcb_demcr, dcb_dhcsr;
+
/* Enable debug requests */
ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN))
ahbap_write_system_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN );
/* Enter debug state on reset, cf. end_reset_event() */
- ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
+ ahbap_write_system_atomic_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
+
+ ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr);
+ ahbap_read_system_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr);
+ DEBUG("dcb_dhcsr 0x%x, dcb_demcr 0x%x, ", dcb_dhcsr, dcb_demcr);
return ERROR_OK;
}
resume_pc = buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32);
- cortex_m3_restore_context(target);
+ armv7m_restore_context(target);
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints)
return ERROR_OK;
}
-//int irqstepcount=0;
+/* int irqstepcount=0; */
int cortex_m3_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
{
/* get pointers to arch-specific information */
target->debug_reason = DBG_REASON_SINGLESTEP;
- cortex_m3_restore_context(target);
+ armv7m_restore_context(target);
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
int cortex_m3_assert_reset(target_t *target)
{
int retval;
-
+ armv7m_common_t *armv7m = target->arch_info;
+ cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
+
DEBUG("target->state: %s", target_state_strings[target->state]);
+ ahbap_write_system_u32(swjdp, DCB_DCRDR, 0 );
+
+ if (target->reset_mode == RESET_RUN)
+ {
+ /* Set/Clear C_MASKINTS in a separate operation */
+ if (cortex_m3->dcb_dhcsr & C_MASKINTS)
+ ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT );
+
+ cortex_m3_clear_halt(target);
+
+ /* Enter debug state on reset, cf. end_reset_event() */
+ ahbap_write_system_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN );
+ ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR);
+ }
+
if (target->state == TARGET_HALTED || target->state == TARGET_UNKNOWN)
{
/* assert SRST and TRST */
ERROR("JTAG failure %i",retval);
return ERROR_JTAG_DEVICE_ERROR;
}
- //DEBUG("load from core reg %i value 0x%x",num,*value);
+ /* DEBUG("load from core reg %i value 0x%x",num,*value); */
}
else if (type == ARMV7M_REGISTER_CORE_SP) /* Special purpose core register */
{
ahbap_write_coreregister_u32(swjdp, 0x20000000, 15);
cortex_m3_single_step_core(target);
ahbap_read_coreregister_u32(swjdp, value, 0);
- armv7m->core_cache->reg_list[0].dirty = 1;
- armv7m->core_cache->reg_list[15].dirty = 1;
+ armv7m->core_cache->reg_list[0].dirty = armv7m->core_cache->reg_list[0].valid;
+ armv7m->core_cache->reg_list[15].dirty = armv7m->core_cache->reg_list[15].valid;
ahbap_write_system_u32(swjdp, 0x20000000, savedram);
swjdp_transaction_endcheck(swjdp);
DEBUG("load from special reg %i value 0x%x", SYSm, *value);
if (retval != ERROR_OK)
{
ERROR("JTAG failure %i", retval);
- armv7m->core_cache->reg_list[num].dirty = 1;
+ armv7m->core_cache->reg_list[num].dirty = armv7m->core_cache->reg_list[num].valid;
return ERROR_JTAG_DEVICE_ERROR;
}
DEBUG("write core reg %i value 0x%x", num, value);
ahbap_write_coreregister_u32(swjdp, 0x20000000, 15);
cortex_m3_single_step_core(target);
ahbap_write_coreregister_u32(swjdp, tempr0, 0);
- armv7m->core_cache->reg_list[15].dirty = 1;
+ armv7m->core_cache->reg_list[15].dirty = armv7m->core_cache->reg_list[15].valid;
ahbap_write_system_u32(swjdp, 0x20000000, savedram);
swjdp_transaction_endcheck(swjdp);
DEBUG("write special reg %i value 0x%x ", SYSm, value);
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 retval;
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
-
- if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
- return ERROR_TARGET_UNALIGNED_ACCESS;
- /* Is not optimal, autoincrement of tar should be used ( ahbap_block_read and CSW_ADDRINC_SINGLE ) */
+ /* cortex_m3 handles unaligned memory access */
+
switch (size)
{
case 4:
- /* TODOLATER Check error return value ! */
- {
- ahbap_read_buf(swjdp, buffer, 4 * count, address);
- }
+ retval = ahbap_read_buf_u32(swjdp, buffer, 4 * count, address);
break;
case 2:
- {
- ahbap_read_buf_u16(swjdp, buffer, 2 * count, address);
- }
+ retval = ahbap_read_buf_u16(swjdp, buffer, 2 * count, address);
break;
case 1:
- {
- ahbap_read_buf(swjdp, buffer, count, address);
- }
+ retval = ahbap_read_buf_u8(swjdp, buffer, count, address);
break;
default:
ERROR("BUG: we shouldn't get here");
exit(-1);
}
- return ERROR_OK;
+ return retval;
}
int cortex_m3_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
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 retval;
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
-
- if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
- return ERROR_TARGET_UNALIGNED_ACCESS;
-
+
switch (size)
{
case 4:
- /* TODOLATER Check error return value ! */
- {
- ahbap_write_buf(swjdp, buffer, 4 * count, address);
- }
+ retval = ahbap_write_buf_u32(swjdp, buffer, 4 * count, address);
break;
case 2:
- {
- ahbap_write_buf_u16(swjdp, buffer, 2 * count, address);
- }
+ retval = ahbap_write_buf_u16(swjdp, buffer, 2 * count, address);
break;
case 1:
- {
- ahbap_write_buf(swjdp, buffer, count, address);
- }
+ retval = ahbap_write_buf_u8(swjdp, buffer, count, address);
break;
default:
ERROR("BUG: we shouldn't get here");
exit(-1);
}
- return ERROR_OK;
+ return retval;
}
int cortex_m3_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
{
- cortex_m3_write_memory(target, address, 4, count, buffer);
-
- return ERROR_OK;
+ return cortex_m3_write_memory(target, address, 4, count, buffer);
}
void cortex_m3_build_reg_cache(target_t *target)
int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
{
- u32 did1, dc0, cpuid, fpcr, dwtcr, ictr;
+ u32 cpuid, fpcr, dwtcr, ictr;
int i;
/* get pointers to arch-specific information */
return ERROR_OK;
}
+int cortex_m3_dcc_read(swjdp_common_t *swjdp, u8 *value, u8 *ctrl)
+{
+ u16 dcrdr;
+
+ ahbap_read_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR);
+ *ctrl = (u8)dcrdr;
+ *value = (u8)(dcrdr >> 8);
+
+ DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl);
+
+ /* write ack back to software dcc register
+ * signify we have read data */
+ if (dcrdr & (1 << 0))
+ {
+ dcrdr = 0;
+ ahbap_write_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR);
+ }
+
+ return ERROR_OK;
+}
+
+int cortex_m3_target_request_data(target_t *target, u32 size, u8 *buffer)
+{
+ armv7m_common_t *armv7m = target->arch_info;
+ cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
+ u8 data;
+ u8 ctrl;
+ int i;
+
+ for (i = 0; i < (size * 4); i++)
+ {
+ cortex_m3_dcc_read(swjdp, &data, &ctrl);
+ buffer[i] = data;
+ }
+
+ return ERROR_OK;
+}
+
+int cortex_m3_handle_target_request(void *priv)
+{
+ target_t *target = priv;
+ armv7m_common_t *armv7m = target->arch_info;
+ cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
+
+ if (!target->dbg_msg_enabled)
+ return ERROR_OK;
+
+ if (target->state == TARGET_RUNNING)
+ {
+ u8 data;
+ u8 ctrl;
+
+ cortex_m3_dcc_read(swjdp, &data, &ctrl);
+
+ /* check if we have data */
+ if (ctrl & (1 << 0))
+ {
+ u32 request;
+
+ /* we assume target is quick enough */
+ request = data;
+ cortex_m3_dcc_read(swjdp, &data, &ctrl);
+ request |= (data << 8);
+ cortex_m3_dcc_read(swjdp, &data, &ctrl);
+ request |= (data << 16);
+ cortex_m3_dcc_read(swjdp, &data, &ctrl);
+ request |= (data << 24);
+ target_request(target, request);
+ }
+ }
+
+ return ERROR_OK;
+}
+
int cortex_m3_init_arch_info(target_t *target, cortex_m3_common_t *cortex_m3, int chain_pos, char *variant)
{
armv7m_common_t *armv7m;
armv7m = &cortex_m3->armv7m;
- arm_jtag_t *jtag_info = &cortex_m3->jtag_info;
-
/* prepare JTAG information for the new target */
cortex_m3->jtag_info.chain_pos = chain_pos;
cortex_m3->jtag_info.scann_size = 4;
armv7m->arch_info = cortex_m3;
armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32;
armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32;
-// armv7m->full_context = cortex_m3_full_context;
+ /* armv7m->full_context = cortex_m3_full_context; */
+
+ target_register_timer_callback(cortex_m3_handle_target_request, 1, 1, target);
return ERROR_OK;
}
int chain_pos;
char *variant = NULL;
cortex_m3_common_t *cortex_m3 = malloc(sizeof(cortex_m3_common_t));
+ memset(cortex_m3, 0, sizeof(*cortex_m3));
if (argc < 4)
{
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