enum arm11_regtype
{
- ARM11_REGISTER_CORE,
- ARM11_REGISTER_CPSR,
-
- ARM11_REGISTER_FX,
- ARM11_REGISTER_FPS,
-
- ARM11_REGISTER_FIQ,
- ARM11_REGISTER_SVC,
- ARM11_REGISTER_ABT,
- ARM11_REGISTER_IRQ,
- ARM11_REGISTER_UND,
- ARM11_REGISTER_MON,
-
- ARM11_REGISTER_SPSR_FIQ,
- ARM11_REGISTER_SPSR_SVC,
- ARM11_REGISTER_SPSR_ABT,
- ARM11_REGISTER_SPSR_IRQ,
- ARM11_REGISTER_SPSR_UND,
- ARM11_REGISTER_SPSR_MON,
-
/* debug regs */
ARM11_REGISTER_DSCR,
ARM11_REGISTER_WDTR,
/* update arm11_regcache_ids when changing this */
static const struct arm11_reg_defs arm11_reg_defs[] =
{
- {"r0", 0, 0, ARM11_REGISTER_CORE},
- {"r1", 1, 1, ARM11_REGISTER_CORE},
- {"r2", 2, 2, ARM11_REGISTER_CORE},
- {"r3", 3, 3, ARM11_REGISTER_CORE},
- {"r4", 4, 4, ARM11_REGISTER_CORE},
- {"r5", 5, 5, ARM11_REGISTER_CORE},
- {"r6", 6, 6, ARM11_REGISTER_CORE},
- {"r7", 7, 7, ARM11_REGISTER_CORE},
- {"r8", 8, 8, ARM11_REGISTER_CORE},
- {"r9", 9, 9, ARM11_REGISTER_CORE},
- {"r10", 10, 10, ARM11_REGISTER_CORE},
- {"r11", 11, 11, ARM11_REGISTER_CORE},
- {"r12", 12, 12, ARM11_REGISTER_CORE},
- {"sp", 13, 13, ARM11_REGISTER_CORE},
- {"lr", 14, 14, ARM11_REGISTER_CORE},
- {"pc", 15, 15, ARM11_REGISTER_CORE},
-
- {"cpsr", 0, 25, ARM11_REGISTER_CPSR},
-
/* Debug Registers */
{"dscr", 0, -1, ARM11_REGISTER_DSCR},
{"wdtr", 0, -1, ARM11_REGISTER_WDTR},
enum arm11_regcache_ids
{
- ARM11_RC_R0,
- ARM11_RC_RX = ARM11_RC_R0,
-
- ARM11_RC_R1,
- ARM11_RC_R2,
- ARM11_RC_R3,
- ARM11_RC_R4,
- ARM11_RC_R5,
- ARM11_RC_R6,
- ARM11_RC_R7,
- ARM11_RC_R8,
- ARM11_RC_R9,
- ARM11_RC_R10,
- ARM11_RC_R11,
- ARM11_RC_R12,
- ARM11_RC_R13,
- ARM11_RC_SP = ARM11_RC_R13,
- ARM11_RC_R14,
- ARM11_RC_LR = ARM11_RC_R14,
- ARM11_RC_R15,
- ARM11_RC_PC = ARM11_RC_R15,
-
- ARM11_RC_CPSR,
-
ARM11_RC_DSCR,
ARM11_RC_WDTR,
ARM11_RC_RDTR,
arm11->reg_list[i].dirty = 0;
}
+ /* See e.g. ARM1136 TRM, "14.8.4 Entering Debug state" */
+
/* Save DSCR */
CHECK_RETVAL(arm11_read_DSCR(arm11, &R(DSCR)));
}
- /* DSCR: set ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE */
- /* ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode", but not to issue ITRs
- ARM1136 seems to require this to issue ITR's as well */
-
+ /* DSCR: set ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE
+ *
+ * ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode",
+ * but not to issue ITRs. ARM1136 seems to require this to issue
+ * ITR's as well...
+ */
uint32_t new_dscr = R(DSCR) | ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE;
/* this executes JTAG queue: */
}
#endif
+ /* Save registers.
+ *
+ * NOTE: ARM1136 TRM suggests saving just R0 here now, then
+ * CPSR and PC after the rDTR stuff. We do it all at once.
+ */
retval = arm_dpm_read_current_registers(&arm11->dpm);
if (retval != ERROR_OK)
LOG_ERROR("DPM REG READ -- fail %d", retval);
if (retval != ERROR_OK)
return retval;
- /* save r0 - r14 */
-
- /** \todo TODO: handle other mode registers */
-
- for (size_t i = 0; i < 15; i++)
- {
- /* MCR p14,0,R?,c0,c5,0 */
- retval = arm11_run_instr_data_from_core(arm11, 0xEE000E15 | (i << 12), &R(RX + i), 1);
- if (retval != ERROR_OK)
- return retval;
- }
-
- /* save rDTR */
+ /* maybe save rDTR */
/* check rDTRfull in DSCR */
arm11->reg_list[ARM11_RC_RDTR].valid = 0;
}
- /* save CPSR */
-
- /* MRS r0,CPSR (move CPSR -> r0 (-> wDTR -> local var)) */
- retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE10F0000, &R(CPSR));
- if (retval != ERROR_OK)
- return retval;
-
- /* save PC */
-
- /* MOV R0,PC (move PC -> r0 (-> wDTR -> local var)) */
- retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE1A0000F, &R(PC));
- if (retval != ERROR_OK)
- return retval;
-
- /* adjust PC depending on ARM state */
-
- if (R(CPSR) & ARM11_CPSR_J) /* Java state */
- {
- arm11->reg_values[ARM11_RC_PC] -= 0;
- }
- else if (R(CPSR) & ARM11_CPSR_T) /* Thumb state */
- {
- arm11->reg_values[ARM11_RC_PC] -= 4;
- }
- else /* ARM state */
- {
- arm11->reg_values[ARM11_RC_PC] -= 8;
- }
+ /* REVISIT Now that we've saved core state, there's may also
+ * be MMU and cache state to care about ...
+ */
if (arm11->simulate_reset_on_next_halt)
{
{
int retval;
- retval = arm11_run_instr_data_prepare(arm11);
- if (retval != ERROR_OK)
- return retval;
-
- /** \todo TODO: handle other mode registers */
-
- /* restore R1 - R14 */
-
- for (unsigned i = 1; i < 15; i++)
- {
- if (!arm11->reg_list[ARM11_RC_RX + i].dirty)
- continue;
+ /* See e.g. ARM1136 TRM, "14.8.5 Leaving Debug state" */
- /* MRC p14,0,r?,c0,c5,0 */
- arm11_run_instr_data_to_core1(arm11,
- 0xee100e15 | (i << 12), R(RX + i));
-
- // LOG_DEBUG("RESTORE R%u %08x", i, R(RX + i));
- }
+ /* NOTE: the ARM1136 TRM suggests restoring all registers
+ * except R0/PC/CPSR right now. Instead, we do them all
+ * at once, just a bit later on.
+ */
- retval = arm11_run_instr_data_finish(arm11);
- if (retval != ERROR_OK)
- return retval;
+ /* REVISIT once we start caring about MMU and cache state,
+ * address it here ...
+ */
/* spec says clear wDTR and rDTR; we assume they are clear as
otherwise our programming would be sloppy */
}
}
-/* DEBUG for now, trust "new" code only for shadowed registers */
-retval = arm_dpm_write_dirty_registers(&arm11->dpm);
-
- retval = arm11_run_instr_data_prepare(arm11);
- if (retval != ERROR_OK)
- return retval;
-
- /* restore original wDTR */
-
+ /* maybe restore original wDTR */
if ((R(DSCR) & ARM11_DSCR_WDTR_FULL) || arm11->reg_list[ARM11_RC_WDTR].dirty)
{
+ retval = arm11_run_instr_data_prepare(arm11);
+ if (retval != ERROR_OK)
+ return retval;
+
/* MCR p14,0,R0,c0,c5,0 */
retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xee000e15, R(WDTR));
if (retval != ERROR_OK)
return retval;
- }
- /* restore CPSR */
-
- /* MSR CPSR,R0*/
- retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe129f000, R(CPSR));
- if (retval != ERROR_OK)
- return retval;
-
-
- /* restore PC */
-
- /* MOV PC,R0 */
- retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe1a0f000, R(PC));
- if (retval != ERROR_OK)
- return retval;
-
-
- /* restore R0 */
-
- /* MRC p14,0,r0,c0,c5,0 */
- arm11_run_instr_data_to_core1(arm11, 0xee100e15, R(R0));
-
- retval = arm11_run_instr_data_finish(arm11);
- if (retval != ERROR_OK)
- return retval;
+ retval = arm11_run_instr_data_finish(arm11);
+ if (retval != ERROR_OK)
+ return retval;
+ }
-/* DEBUG use this when "new" code is really managing core registers */
-// retval = arm_dpm_write_dirty_registers(&arm11->dpm);
+ /* restore CPSR, PC, and R0 ... after flushing any modified
+ * registers.
+ */
+ retval = arm_dpm_write_dirty_registers(&arm11->dpm);
register_cache_invalidate(arm11->arm.core_cache);
arm11_write_DSCR(arm11, R(DSCR));
- /* restore rDTR */
+ /* maybe restore rDTR */
if (R(DSCR) & ARM11_DSCR_RDTR_FULL || arm11->reg_list[ARM11_RC_RDTR].dirty)
{
arm11_add_dr_scan_vc(ARRAY_SIZE(chain5_fields), chain5_fields, TAP_DRPAUSE);
}
+ /* now processor is ready to RESTART */
+
return ERROR_OK;
}
return ERROR_OK;
}
+static uint32_t
+arm11_nextpc(struct arm11_common *arm11, int current, uint32_t address)
+{
+ void *value = arm11->arm.core_cache->reg_list[15].value;
+
+ if (!current)
+ buf_set_u32(value, 0, 32, address);
+ else
+ address = buf_get_u32(value, 0, 32);
+
+ return address;
+}
+
static int arm11_resume(struct target *target, int current,
uint32_t address, int handle_breakpoints, int debug_execution)
{
return ERROR_TARGET_NOT_HALTED;
}
- if (!current)
- R(PC) = address;
+ address = arm11_nextpc(arm11, current, address);
- LOG_DEBUG("RESUME PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
+ LOG_DEBUG("RESUME PC %08" PRIx32 "%s", address, !current ? "!" : "");
/* clear breakpoints/watchpoints and VCR*/
arm11_sc7_clear_vbw(arm11);
for (bp = target->breakpoints; bp; bp = bp->next)
{
- if (bp->address == R(PC))
+ if (bp->address == address)
{
LOG_DEBUG("must step over %08" PRIx32 "", bp->address);
arm11_step(target, 1, 0, 0);
struct arm11_common *arm11 = target_to_arm11(target);
- if (!current)
- R(PC) = address;
+ address = arm11_nextpc(arm11, current, address);
- LOG_DEBUG("STEP PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
+ LOG_DEBUG("STEP PC %08" PRIx32 "%s", address, !current ? "!" : "");
/** \todo TODO: Thumb not supported here */
uint32_t next_instruction;
- CHECK_RETVAL(arm11_read_memory_word(arm11, R(PC), &next_instruction));
+ CHECK_RETVAL(arm11_read_memory_word(arm11, address, &next_instruction));
/* skip over BKPT */
if ((next_instruction & 0xFFF00070) == 0xe1200070)
{
- R(PC) += 4;
- arm11->reg_list[ARM11_RC_PC].valid = 1;
- arm11->reg_list[ARM11_RC_PC].dirty = 0;
+ address = arm11_nextpc(arm11, 0, address + 4);
LOG_DEBUG("Skipping BKPT");
}
/* skip over Wait for interrupt / Standby */
/* mcr 15, 0, r?, cr7, cr0, {4} */
else if ((next_instruction & 0xFFFF0FFF) == 0xee070f90)
{
- R(PC) += 4;
- arm11->reg_list[ARM11_RC_PC].valid = 1;
- arm11->reg_list[ARM11_RC_PC].dirty = 0;
+ address = arm11_nextpc(arm11, 0, address + 4);
LOG_DEBUG("Skipping WFI");
}
/* ignore B to self */
* FIXME Thumb stepping likely needs to use 0x03
* or 0xc0 byte masks, not 0x0f.
*/
- brp[0].value = R(PC);
+ brp[0].value = address;
brp[1].value = 0x1 | (3 << 1) | (0x0F << 5)
| (0 << 14) | (0 << 16) | (0 << 20)
| (2 << 21);
switch (size)
{
case 1:
- /** \todo TODO: check if dirty is the right choice to force a rewrite on arm11_resume() */
- arm11->reg_list[ARM11_RC_R1].dirty = 1;
+ arm11->arm.core_cache->reg_list[1].dirty = true;
for (size_t i = 0; i < count; i++)
{
case 2:
{
- arm11->reg_list[ARM11_RC_R1].dirty = 1;
+ arm11->arm.core_cache->reg_list[1].dirty = true;
for (size_t i = 0; i < count; i++)
{
}
/*
-* arm11_config_memrw_no_increment - in the future we may want to be able
+* no_increment - in the future we may want to be able
* to read/write a range of data to a "port". a "port" is an action on
* read memory address for some peripheral.
*/
static int arm11_write_memory_inner(struct target *target,
- uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer,
- bool arm11_config_memrw_no_increment)
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer,
+ bool no_increment)
{
int retval;
{
case 1:
{
- arm11->reg_list[ARM11_RC_R1].dirty = 1;
+ arm11->arm.core_cache->reg_list[1].dirty = true;
for (size_t i = 0; i < count; i++)
{
/* strb r1, [r0], #1 */
/* strb r1, [r0] */
retval = arm11_run_instr_no_data1(arm11,
- !arm11_config_memrw_no_increment ? 0xe4c01001 : 0xe5c01000);
+ !no_increment
+ ? 0xe4c01001
+ : 0xe5c01000);
if (retval != ERROR_OK)
return retval;
}
case 2:
{
- arm11->reg_list[ARM11_RC_R1].dirty = 1;
+ arm11->arm.core_cache->reg_list[1].dirty = true;
for (size_t i = 0; i < count; i++)
{
/* strh r1, [r0], #2 */
/* strh r1, [r0] */
retval = arm11_run_instr_no_data1(arm11,
- !arm11_config_memrw_no_increment ? 0xe0c010b2 : 0xe1c010b0);
+ !no_increment
+ ? 0xe0c010b2
+ : 0xe1c010b0);
if (retval != ERROR_OK)
return retval;
}
}
case 4: {
- uint32_t instr = !arm11_config_memrw_no_increment ? 0xeca05e01 : 0xed805e00;
+ uint32_t instr = !no_increment ? 0xeca05e01 : 0xed805e00;
/** \todo TODO: buffer cast to uint32_t* causes alignment warnings */
uint32_t *words = (uint32_t*)buffer;
}
/* r0 verification */
- if (!arm11_config_memrw_no_increment)
+ if (!no_increment)
{
uint32_t r0;
}
static int arm11_write_memory(struct target *target,
- uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
{
- return arm11_write_memory_inner(target, address, size, count, buffer, false);
+ /* pointer increment matters only for multi-unit writes ...
+ * not e.g. to a "reset the chip" controller.
+ */
+ return arm11_write_memory_inner(target, address, size,
+ count, buffer, count == 1);
}
/* write target memory in multiples of 4 byte, optimized for writing large quantities of data */
return ERROR_FAIL;
}
+static int arm11_mrc(struct target *target, int cpnum,
+ uint32_t op1, uint32_t op2,
+ uint32_t CRn, uint32_t CRm, uint32_t *value);
+static int arm11_mcr(struct target *target, int cpnum,
+ uint32_t op1, uint32_t op2, uint32_t CRn,
+ uint32_t CRm, uint32_t value);
+
static int arm11_target_create(struct target *target, Jim_Interp *interp)
{
struct arm11_common *arm11;
armv4_5_init_arch_info(target, &arm11->arm);
+ arm11->arm.mrc = arm11_mrc;
+ arm11->arm.mcr = arm11_mcr;
+
arm11->target = target;
arm11->jtag_info.tap = target->tap;
{
/* Initialize anything we can set up without talking to the target */
- /* FIXME Switch to use the standard build_reg_cache() not custom
- * code. Do it from examine(), after we check whether we're
- * an arm1176 and thus support the Secure Monitor mode.
+ /* REVISIT do we really want such a debug-registers-only cache?
+ * If we do, it should probably be handled purely by the DPM code,
+ * so it works identically on the v7a/v7r cores.
*/
return arm11_build_reg_cache(target);
}
arm11->reg_list = reg_list;
- /* Build the process context cache */
- cache->name = "arm11 registers";
- cache->next = NULL;
+ /* build cache for some of the debug registers */
+ cache->name = "arm11 debug registers";
cache->reg_list = reg_list;
cache->num_regs = ARM11_REGCACHE_COUNT;
(*cache_p) = cache;
arm11->core_cache = cache;
-// armv7m->process_context = cache;
size_t i;
return arm11_mrc_inner(target, cpnum, op1, op2, CRn, CRm, &value, false);
}
-static int arm11_register_commands(struct command_context *cmd_ctx)
-{
- struct command *top_cmd, *mw_cmd;
-
- armv4_5_register_commands(cmd_ctx);
-
- top_cmd = register_command(cmd_ctx, NULL, "arm11",
- NULL, COMMAND_ANY, NULL);
-
- /* "hardware_step" is only here to check if the default
- * simulate + breakpoint implementation is broken.
- * TEMPORARY! NOT DOCUMENTED!
- */
- register_command(cmd_ctx, top_cmd, "hardware_step",
- arm11_handle_bool_hardware_step, COMMAND_ANY,
- "DEBUG ONLY - Hardware single stepping"
- " (default: disabled)");
-
- mw_cmd = register_command(cmd_ctx, top_cmd, "memwrite",
- NULL, COMMAND_ANY, NULL);
- register_command(cmd_ctx, mw_cmd, "burst",
- arm11_handle_bool_memwrite_burst, COMMAND_ANY,
- "Enable/Disable non-standard but fast burst mode"
- " (default: enabled)");
- register_command(cmd_ctx, mw_cmd, "error_fatal",
- arm11_handle_bool_memwrite_error_fatal, COMMAND_ANY,
- "Terminate program if transfer error was found"
- " (default: enabled)");
-
- register_command(cmd_ctx, top_cmd, "step_irq_enable",
- arm11_handle_bool_step_irq_enable, COMMAND_ANY,
- "Enable interrupts while stepping"
- " (default: disabled)");
- register_command(cmd_ctx, top_cmd, "vcr",
- arm11_handle_vcr, COMMAND_ANY,
- "Control (Interrupt) Vector Catch Register");
-
- return etm_register_commands(cmd_ctx);
-}
+static const struct command_registration arm11_mw_command_handlers[] = {
+ {
+ .name = "burst",
+ .handler = &arm11_handle_bool_memwrite_burst,
+ .mode = COMMAND_ANY,
+ .help = "Enable/Disable non-standard but fast burst mode"
+ " (default: enabled)",
+ },
+ {
+ .name = "error_fatal",
+ .handler = &arm11_handle_bool_memwrite_error_fatal,
+ .mode = COMMAND_ANY,
+ .help = "Terminate program if transfer error was found"
+ " (default: enabled)",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+static const struct command_registration arm11_any_command_handlers[] = {
+ {
+ /* "hardware_step" is only here to check if the default
+ * simulate + breakpoint implementation is broken.
+ * TEMPORARY! NOT DOCUMENTED! */
+ .name = "hardware_step",
+ .handler = &arm11_handle_bool_hardware_step,
+ .mode = COMMAND_ANY,
+ .help = "DEBUG ONLY - Hardware single stepping"
+ " (default: disabled)",
+ .usage = "(enable|disable)",
+ },
+ {
+ .name = "memwrite",
+ .mode = COMMAND_ANY,
+ .help = "memwrite command group",
+ .chain = arm11_mw_command_handlers,
+ },
+ {
+ .name = "step_irq_enable",
+ .handler = &arm11_handle_bool_step_irq_enable,
+ .mode = COMMAND_ANY,
+ .help = "Enable interrupts while stepping"
+ " (default: disabled)",
+ },
+ {
+ .name = "vcr",
+ .handler = &arm11_handle_vcr,
+ .mode = COMMAND_ANY,
+ .help = "Control (Interrupt) Vector Catch Register",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+static const struct command_registration arm11_command_handlers[] = {
+ {
+ .chain = arm_command_handlers,
+ },
+ {
+ .chain = etm_command_handlers,
+ },
+ {
+ .name = "arm11",
+ .mode = COMMAND_ANY,
+ .help = "ARM11 command group",
+ .chain = arm11_any_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
/** Holds methods for ARM11xx targets. */
struct target_type arm11_target = {
.run_algorithm = armv4_5_run_algorithm,
- .register_commands = arm11_register_commands,
+ .commands = arm11_command_handlers,
.target_create = arm11_target_create,
.init_target = arm11_init_target,
.examine = arm11_examine,
-
- .mrc = arm11_mrc,
- .mcr = arm11_mcr,
};