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Michael Bruck:

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arm11

--- Added burst memory transfer mode

This does not explicitly query command execution but rather uses a small
delay produced by the FT2232 on certain TAP commands.

A potential failure of this process is detected afterwards and the
program terminates with an error.

'arm11 memwrite burst disable'
  can be used to switch this feature off.

'arm11 memwrite error_fatal disable'
  can be used to prevent the program to exit on an memory write error


--- Added support for interrupt breaking via VCR register

Use 'arm11 vcr' command to set.


--- Cleaned up the handling of

halt/resume/step/poll, target->state, target->debug_reason,
target_call_event_callbacks() at least as far as I could guess the
intended behaviour from other targets.

Did some overall positive tests with GDB.


--- Added support for breakpoints

Hardware breakpoints only. All breakpoints will be treated as hardware
breakpoints.

All ARM11's seem to have at least 6 hardware breakpoints.

--- Stepping over BKPT added

Modification to PC without touching the target.

--- Stepping over a B or BL to self will do nothing


git-svn-id: svn://svn.berlios.de/openocd/trunk@385 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe
2008-02-29 07:03:28 +00:00
parent 881dddd84f
commit 4febcd8313
5 changed files with 576 additions and 107 deletions
Download Patch File Download Diff File Expand all files Collapse all files

413
src/target/arm11.c
View File

@@ -48,6 +48,11 @@
static void arm11_on_enter_debug_state(arm11_common_t * arm11);
bool arm11_config_memwrite_burst = true;
bool arm11_config_memwrite_error_fatal = true;
u32 arm11_vcr = 0;
#define ARM11_HANDLER(x) \
.x = arm11_##x
@@ -338,7 +343,7 @@ void arm11_check_init(arm11_common_t * arm11, u32 * dscr)
arm11->target->debug_reason = DBG_REASON_NOTHALTED;
}
arm11_sc7_clear_bw(arm11);
arm11_sc7_clear_vbw(arm11);
}
}
@@ -382,7 +387,7 @@ static void arm11_on_enter_debug_state(arm11_common_t * arm11)
arm11_setup_field(arm11, 1, NULL, NULL, chain5_fields + 1);
arm11_setup_field(arm11, 1, NULL, NULL, chain5_fields + 2);
jtag_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_PD);
arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_PD);
}
else
{
@@ -501,7 +506,11 @@ static void arm11_on_enter_debug_state(arm11_common_t * arm11)
arm11_run_instr_data_finish(arm11);
arm11_dump_reg_changes(arm11);
}
void arm11_dump_reg_changes(arm11_common_t * arm11)
{
{size_t i;
for(i = 0; i < ARM11_REGCACHE_COUNT; i++)
{
@@ -556,7 +565,7 @@ void arm11_leave_debug_state(arm11_common_t * arm11)
/* spec says clear wDTR and rDTR; we assume they are clear as
otherwide out programming would be sloppy */
otherwise our programming would be sloppy */
{
u32 DSCR = arm11_read_DSCR(arm11);
@@ -619,10 +628,14 @@ void arm11_leave_debug_state(arm11_common_t * arm11)
arm11_setup_field(arm11, 1, &Ready, NULL, chain5_fields + 1);
arm11_setup_field(arm11, 1, &Valid, NULL, chain5_fields + 2);
jtag_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_PD);
arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_PD);
}
arm11_record_register_history(arm11);
}
void arm11_record_register_history(arm11_common_t * arm11)
{
{size_t i;
for(i = 0; i < ARM11_REGCACHE_COUNT; i++)
{
@@ -653,21 +666,22 @@ int arm11_poll(struct target_s *target)
if (dscr & ARM11_DSCR_CORE_HALTED)
{
// DEBUG("CH %d", target->state);
if (target->state != TARGET_HALTED)
{
enum target_state old_state = target->state;
DEBUG("enter TARGET_HALTED");
target->state = TARGET_HALTED;
target->debug_reason = arm11_get_DSCR_debug_reason(dscr);
arm11_on_enter_debug_state(arm11);
target_call_event_callbacks(target,
old_state == TARGET_DEBUG_RUNNING ? TARGET_EVENT_DEBUG_HALTED : TARGET_EVENT_HALTED);
}
}
else
{
// DEBUG("CR %d", target->state);
if (target->state != TARGET_RUNNING)
if (target->state != TARGET_RUNNING && target->state != TARGET_DEBUG_RUNNING)
{
DEBUG("enter TARGET_RUNNING");
target->state = TARGET_RUNNING;
@@ -733,9 +747,14 @@ int arm11_halt(struct target_s *target)
arm11_on_enter_debug_state(arm11);
enum target_state old_state = target->state;
target->state = TARGET_HALTED;
target->debug_reason = arm11_get_DSCR_debug_reason(dscr);
target_call_event_callbacks(target,
old_state == TARGET_DEBUG_RUNNING ? TARGET_EVENT_DEBUG_HALTED : TARGET_EVENT_HALTED);
return ERROR_OK;
}
@@ -744,6 +763,9 @@ int arm11_resume(struct target_s *target, int current, u32 address, int handle_b
{
FNC_INFO;
// DEBUG("current %d address %08x handle_breakpoints %d debug_execution %d",
// current, address, handle_breakpoints, debug_execution);
arm11_common_t * arm11 = target->arch_info;
DEBUG("target->state: %s", target_state_strings[target->state]);
@@ -757,8 +779,53 @@ int arm11_resume(struct target_s *target, int current, u32 address, int handle_b
if (!current)
R(PC) = address;
target->state = TARGET_RUNNING;
target->debug_reason = DBG_REASON_NOTHALTED;
INFO("RESUME PC %08x", R(PC));
/* clear breakpoints/watchpoints and VCR*/
arm11_sc7_clear_vbw(arm11);
/* Set up breakpoints */
if (!debug_execution)
{
/* check if one matches PC and step over it if necessary */
breakpoint_t * bp;
for (bp = target->breakpoints; bp; bp = bp->next)
{
if (bp->address == R(PC))
{
DEBUG("must step over %08x", bp->address);
arm11_step(target, 1, 0, 0);
break;
}
}
/* set all breakpoints */
size_t brp_num = 0;
for (bp = target->breakpoints; bp; bp = bp->next)
{
arm11_sc7_action_t brp[2];
brp[0].write = 1;
brp[0].address = ARM11_SC7_BVR0 + brp_num;
brp[0].value = bp->address;
brp[1].write = 1;
brp[1].address = ARM11_SC7_BCR0 + brp_num;
brp[1].value = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
arm11_sc7_run(arm11, brp, asizeof(brp));
DEBUG("Add BP %d at %08x", brp_num, bp->address);
brp_num++;
}
arm11_sc7_set_vcr(arm11, arm11_vcr);
}
arm11_leave_debug_state(arm11);
@@ -776,7 +843,18 @@ int arm11_resume(struct target_s *target, int current, u32 address, int handle_b
break;
}
DEBUG("RES %d", target->state);
if (!debug_execution)
{
target->state = TARGET_RUNNING;
target->debug_reason = DBG_REASON_NOTHALTED;
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
}
else
{
target->state = TARGET_DEBUG_RUNNING;
target->debug_reason = DBG_REASON_NOTHALTED;
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
}
return ERROR_OK;
}
@@ -795,61 +873,87 @@ int arm11_step(struct target_s *target, int current, u32 address, int handle_bre
arm11_common_t * arm11 = target->arch_info;
/** \todo TODO: check if break-/watchpoints make any sense at all in combination
* with this. */
if (!current)
R(PC) = address;
/** \todo TODO: check if disabling IRQs might be a good idea here. Alternatively
the VCR might be something worth looking into. */
INFO("STEP PC %08x", R(PC));
/* Set up breakpoint for stepping */
/** \todo TODO: Thumb not supported here */
arm11_sc7_action_t brp[2];
u32 next_instruction;
brp[0].write = 1;
brp[0].address = ARM11_SC7_BVR0;
brp[0].value = R(PC);
brp[1].write = 1;
brp[1].address = ARM11_SC7_BCR0;
brp[1].value = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (2 << 21);
arm11_read_memory_word(arm11, R(PC), &next_instruction);
arm11_sc7_run(arm11, brp, asizeof(brp));
/* resume */
arm11_leave_debug_state(arm11);
arm11_add_IR(arm11, ARM11_RESTART, TAP_RTI);
jtag_execute_queue();
/** \todo TODO: add a timeout */
/* wait for halt */
while (1)
/** skip over BKPT */
if ((next_instruction & 0xFFF00070) == 0xe1200070)
{
u32 dscr = arm11_read_DSCR(arm11);
DEBUG("DSCR %08x", dscr);
if ((dscr & (ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED)) ==
(ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED))
break;
R(PC) += 4;
arm11->reg_list[ARM11_RC_PC].valid = 1;
arm11->reg_list[ARM11_RC_PC].dirty = 0;
INFO("Skipping BKPT");
}
/* ignore B to self */
else if ((next_instruction & 0xFEFFFFFF) == 0xeafffffe)
{
INFO("Not stepping jump to self");
}
else
{
/** \todo TODO: check if break-/watchpoints make any sense at all in combination
* with this. */
/** \todo TODO: check if disabling IRQs might be a good idea here. Alternatively
* the VCR might be something worth looking into. */
/* clear breakpoint */
/* Set up breakpoint for stepping */
arm11_sc7_clear_bw(arm11);
arm11_sc7_action_t brp[2];
brp[0].write = 1;
brp[0].address = ARM11_SC7_BVR0;
brp[0].value = R(PC);
brp[1].write = 1;
brp[1].address = ARM11_SC7_BCR0;
brp[1].value = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (2 << 21);
/* save state */
arm11_sc7_run(arm11, brp, asizeof(brp));
arm11_on_enter_debug_state(arm11);
/* resume */
arm11_leave_debug_state(arm11);
arm11_add_IR(arm11, ARM11_RESTART, TAP_RTI);
jtag_execute_queue();
/** \todo TODO: add a timeout */
/* wait for halt */
while (1)
{
u32 dscr = arm11_read_DSCR(arm11);
DEBUG("DSCR %08x", dscr);
if ((dscr & (ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED)) ==
(ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED))
break;
}
/* clear breakpoint */
arm11_sc7_clear_vbw(arm11);
/* save state */
arm11_on_enter_debug_state(arm11);
}
// target->state = TARGET_HALTED;
target->debug_reason = DBG_REASON_SINGLESTEP;
target_call_event_callbacks(target, TARGET_EVENT_HALTED);
return ERROR_OK;
}
@@ -1064,13 +1168,47 @@ int arm11_write_memory(struct target_s *target, u32 address, u32 size, u32 count
case 4:
/** \todo TODO: check if buffer cast to u32* might cause alignment problems */
/* STC p14,c5,[R0],#4 */
arm11_run_instr_data_to_core(arm11, 0xeca05e01, (u32 *)buffer, count);
if (!arm11_config_memwrite_burst)
{
/* STC p14,c5,[R0],#4 */
arm11_run_instr_data_to_core(arm11, 0xeca05e01, (u32 *)buffer, count);
}
else
{
/* STC p14,c5,[R0],#4 */
arm11_run_instr_data_to_core_noack(arm11, 0xeca05e01, (u32 *)buffer, count);
}
break;
}
#if 1
/* r0 verification */
{
u32 r0;
/* MCR p14,0,R0,c0,c5,0 */
arm11_run_instr_data_from_core(arm11, 0xEE000E15, &r0, 1);
if (address + size * count != r0)
{
ERROR("Data transfer failed. (%d)", (r0 - address) - size * count);
if (arm11_config_memwrite_burst)
ERROR("use 'arm11 memwrite burst disable' to disable fast burst mode");
if (arm11_config_memwrite_error_fatal)
exit(-1);
}
}
#endif
arm11_run_instr_data_finish(arm11);
return ERROR_OK;
}
@@ -1097,14 +1235,42 @@ int arm11_checksum_memory(struct target_s *target, u32 address, u32 count, u32*
*/
int arm11_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
{
FNC_INFO_NOTIMPLEMENTED;
FNC_INFO;
arm11_common_t * arm11 = target->arch_info;
#if 0
if (breakpoint->type == BKPT_SOFT)
{
INFO("sw breakpoint requested, but software breakpoints not enabled");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
#endif
if (!arm11->free_brps)
{
INFO("no breakpoint unit available for hardware breakpoint");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
if (breakpoint->length != 4)
{
INFO("only breakpoints of four bytes length supported");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
arm11->free_brps--;
return ERROR_OK;
}
int arm11_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
{
FNC_INFO_NOTIMPLEMENTED;
FNC_INFO;
arm11_common_t * arm11 = target->arch_info;
arm11->free_brps++;
return ERROR_OK;
}
@@ -1132,14 +1298,6 @@ int arm11_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t
return ERROR_OK;
}
int arm11_register_commands(struct command_context_s *cmd_ctx)
{
FNC_INFO;
return ERROR_OK;
}
int arm11_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
{
FNC_INFO;
@@ -1189,7 +1347,7 @@ int arm11_init_target(struct command_context_s *cmd_ctx, struct target_s *target
arm11_setup_field(arm11, 32, NULL, &arm11->device_id, &idcode_field);
jtag_add_dr_scan_vc(1, &idcode_field, TAP_PD);
arm11_add_dr_scan_vc(1, &idcode_field, TAP_PD);
/* check DIDR */
@@ -1202,7 +1360,7 @@ int arm11_init_target(struct command_context_s *cmd_ctx, struct target_s *target
arm11_setup_field(arm11, 32, NULL, &arm11->didr, chain0_fields + 0);
arm11_setup_field(arm11, 8, NULL, &arm11->implementor, chain0_fields + 1);
jtag_add_dr_scan_vc(asizeof(chain0_fields), chain0_fields, TAP_RTI);
arm11_add_dr_scan_vc(asizeof(chain0_fields), chain0_fields, TAP_RTI);
jtag_execute_queue();
@@ -1219,9 +1377,22 @@ int arm11_init_target(struct command_context_s *cmd_ctx, struct target_s *target
}
}
arm11->debug_version = (arm11->didr >> 16) & 0x0F;
if (arm11->debug_version != ARM11_DEBUG_V6 &&
arm11->debug_version != ARM11_DEBUG_V61)
{
ERROR("Only ARMv6 v6 and v6.1 architectures supported.");
exit(-1);
}
arm11->brp = ((arm11->didr >> 24) & 0x0F) + 1;
arm11->wrp = ((arm11->didr >> 28) & 0x0F) + 1;
/** \todo TODO: reserve one brp slot if we allow breakpoints during step */
arm11->free_brps = arm11->brp;
arm11->free_wrps = arm11->wrp;
DEBUG("IDCODE %08x IMPLEMENTOR %02x DIDR %08x",
arm11->device_id,
@@ -1260,7 +1431,7 @@ int arm11_get_reg(reg_t *reg)
return ERROR_TARGET_NOT_HALTED;
}
/** \todo TODO: Check this. We assume that all registers are fetched debug entry. */
/** \todo TODO: Check this. We assume that all registers are fetched at debug entry. */
#if 0
arm11_common_t *arm11 = target->arch_info;
@@ -1344,15 +1515,105 @@ void arm11_build_reg_cache(target_t *target)
}
}
#if 0
arm11_run_instr_data_prepare(arm11);
/* MRC p14,0,r0,c0,c5,0 */
arm11_run_instr_data_to_core(arm11, 0xee100e15, 0xCA00003C);
/* MRC p14,0,r1,c0,c5,0 */
arm11_run_instr_data_to_core(arm11, 0xee101e15, 0xFFFFFFFF);
arm11_run_instr_data_finish(arm11);
#endif
int arm11_handle_bool(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, bool * var, char * name)
{
if (argc == 0)
{
INFO("%s is %s.", name, *var ? "enabled" : "disabled");
return ERROR_OK;
}
if (argc != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
switch (args[0][0])
{
case '0': /* 0 */
case 'f': /* false */
case 'F':
case 'd': /* disable */
case 'D':
*var = false;
break;
case '1': /* 1 */
case 't': /* true */
case 'T':
case 'e': /* enable */
case 'E':
*var = true;
break;
}
INFO("%s %s.", *var ? "Enabled" : "Disabled", name);
return ERROR_OK;
}
#define BOOL_WRAPPER(name, print_name) \
int arm11_handle_bool_##name(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) \
{ \
return arm11_handle_bool(cmd_ctx, cmd, args, argc, &arm11_config_##name, print_name); \
}
#define RC_TOP(name, descr, more) \
{ \
command_t * new_cmd = register_command(cmd_ctx, top_cmd, name, NULL, COMMAND_ANY, descr); \
command_t * top_cmd = new_cmd; \
more \
}
#define RC_FINAL(name, descr, handler) \
register_command(cmd_ctx, top_cmd, name, handler, COMMAND_ANY, descr);
#define RC_FINAL_BOOL(name, descr, var) \
register_command(cmd_ctx, top_cmd, name, arm11_handle_bool_##var, COMMAND_ANY, descr);
BOOL_WRAPPER(memwrite_burst, "memory write burst mode")
BOOL_WRAPPER(memwrite_error_fatal, "fatal error mode for memory writes")
int arm11_handle_vcr(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 1)
{
arm11_vcr = strtoul(args[0], NULL, 0);
}
else if (argc != 0)
{
return ERROR_COMMAND_SYNTAX_ERROR;
}
INFO("VCR 0x%08X", arm11_vcr);
return ERROR_OK;
}
int arm11_register_commands(struct command_context_s *cmd_ctx)
{
FNC_INFO;
command_t * top_cmd = NULL;
RC_TOP( "arm11", "arm11 specific commands",
RC_TOP( "memwrite", "Control memory write transfer mode",
RC_FINAL_BOOL( "burst", "Enable/Disable non-standard but fast burst mode (default: enabled)",
memwrite_burst)
RC_FINAL_BOOL( "error_fatal",
"Terminate program if transfer error was found (default: enabled)",
memwrite_error_fatal)
)
RC_FINAL( "vcr", "Control (Interrupt) Vector Catch Register",
arm11_handle_vcr)
)
return ERROR_OK;
}