#define XT_SR_DDR (xtensa_regs[XT_REG_IDX_DDR].reg_num)
#define XT_SR_PS (xtensa_regs[XT_REG_IDX_PS].reg_num)
#define XT_SR_WB (xtensa_regs[XT_REG_IDX_WINDOWBASE].reg_num)
+#define XT_REG_A0 (xtensa_regs[XT_REG_IDX_AR0].reg_num)
#define XT_REG_A3 (xtensa_regs[XT_REG_IDX_AR3].reg_num)
#define XT_REG_A4 (xtensa_regs[XT_REG_IDX_AR4].reg_num)
#define XT_EPC_REG_NUM_BASE (0xb0U) /* (EPC1 - 1), for adding DBGLEVEL */
#define XT_PC_REG_NUM_VIRTUAL (0xffU) /* Marker for computing PC (EPC[DBGLEVEL) */
#define XT_PC_DBREG_NUM_BASE (0x20U) /* External (i.e., GDB) access */
+#define XT_NX_IBREAKC_BASE (0xc0U) /* (IBREAKC0..IBREAKC1) for NX */
#define XT_SW_BREAKPOINTS_MAX_NUM 32
#define XT_HW_IBREAK_MAX_NUM 2
LOG_ERROR("Error: can't convert register %d to non-windowbased register!", reg_idx);
return -1;
}
- return ((idx + windowbase * 4) & (xtensa->core_config->aregs_num - 1)) + XT_REG_IDX_AR0;
+ /* Each windowbase value represents 4 registers on LX and 8 on NX */
+ int base_inc = (xtensa->core_config->core_type == XT_LX) ? 4 : 8;
+ return ((idx + windowbase * base_inc) & (xtensa->core_config->aregs_num - 1)) + XT_REG_IDX_AR0;
}
static enum xtensa_reg_id xtensa_canonical_to_windowbase_offset(struct xtensa *xtensa,
static int xtensa_window_state_save(struct target *target, uint32_t *woe)
{
struct xtensa *xtensa = target_to_xtensa(target);
- int woe_dis;
+ unsigned int woe_sr = (xtensa->core_config->core_type == XT_LX) ? XT_SR_PS : XT_SR_WB;
+ uint32_t woe_dis;
uint8_t woe_buf[4];
if (xtensa->core_config->windowed) {
- /* Save PS (LX) and disable window overflow exceptions prior to AR save */
- xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_PS, XT_REG_A3));
+ /* Save PS (LX) or WB (NX) and disable window overflow exceptions prior to AR save */
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, woe_sr, XT_REG_A3));
xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
xtensa_queue_dbg_reg_read(xtensa, XDMREG_DDR, woe_buf);
int res = xtensa_dm_queue_execute(&xtensa->dbg_mod);
if (res != ERROR_OK) {
- LOG_ERROR("Failed to read PS (%d)!", res);
+ LOG_TARGET_ERROR(target, "Failed to read %s (%d)!",
+ (woe_sr == XT_SR_PS) ? "PS" : "WB", res);
return res;
}
xtensa_core_status_check(target);
*woe = buf_get_u32(woe_buf, 0, 32);
- woe_dis = *woe & ~XT_PS_WOE_MSK;
- LOG_DEBUG("Clearing PS.WOE (0x%08" PRIx32 " -> 0x%08" PRIx32 ")", *woe, woe_dis);
+ woe_dis = *woe & ~((woe_sr == XT_SR_PS) ? XT_PS_WOE_MSK : XT_WB_S_MSK);
+ LOG_TARGET_DEBUG(target, "Clearing %s (0x%08" PRIx32 " -> 0x%08" PRIx32 ")",
+ (woe_sr == XT_SR_PS) ? "PS.WOE" : "WB.S", *woe, woe_dis);
xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, woe_dis);
xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
- xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_PS, XT_REG_A3));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, woe_sr, XT_REG_A3));
}
return ERROR_OK;
}
static void xtensa_window_state_restore(struct target *target, uint32_t woe)
{
struct xtensa *xtensa = target_to_xtensa(target);
+ unsigned int woe_sr = (xtensa->core_config->core_type == XT_LX) ? XT_SR_PS : XT_SR_WB;
if (xtensa->core_config->windowed) {
/* Restore window overflow exception state */
xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, woe);
xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
- xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_PS, XT_REG_A3));
- LOG_DEBUG("Restored PS.WOE (0x%08" PRIx32 ")", woe);
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, woe_sr, XT_REG_A3));
+ LOG_TARGET_DEBUG(target, "Restored %s (0x%08" PRIx32 ")",
+ (woe_sr == XT_SR_PS) ? "PS.WOE" : "WB", woe);
}
}
bool preserve_a3 = false;
uint8_t a3_buf[4];
xtensa_reg_val_t a3 = 0, woe;
+ unsigned int ms_idx = (xtensa->core_config->core_type == XT_NX) ?
+ xtensa->nx_reg_idx[XT_NX_REG_IDX_MS] : reg_list_size;
+ xtensa_reg_val_t ms;
+ bool restore_ms = false;
LOG_TARGET_DEBUG(target, "start");
} else if (rlist[ridx].type == XT_REG_FR) {
xtensa_queue_exec_ins(xtensa, XT_INS_WFR(xtensa, reg_num, XT_REG_A3));
} else {/*SFR */
- if (reg_num == XT_PC_REG_NUM_VIRTUAL)
- /* reg number of PC for debug interrupt depends on NDEBUGLEVEL
- **/
- reg_num =
- (XT_EPC_REG_NUM_BASE +
- xtensa->core_config->debug.irq_level);
- xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, reg_num, XT_REG_A3));
+ if (reg_num == XT_PC_REG_NUM_VIRTUAL) {
+ if (xtensa->core_config->core_type == XT_LX) {
+ /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
+ reg_num = (XT_EPC_REG_NUM_BASE + xtensa->core_config->debug.irq_level);
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, reg_num, XT_REG_A3));
+ } else {
+ /* NX PC set through issuing a jump instruction */
+ xtensa_queue_exec_ins(xtensa, XT_INS_JX(xtensa, XT_REG_A3));
+ }
+ } else if (i == ms_idx) {
+ /* MS must be restored after ARs. This ensures ARs remain in correct
+ * order even for reversed register groups (overflow/underflow).
+ */
+ ms = regval;
+ restore_ms = true;
+ LOG_TARGET_DEBUG(target, "Delaying MS write: 0x%x", ms);
+ } else {
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, reg_num, XT_REG_A3));
+ }
}
}
reg_list[i].dirty = false;
xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, regval);
xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa,
- xtensa_regs[XT_REG_IDX_CPENABLE].reg_num,
- XT_REG_A3));
+ xtensa_regs[XT_REG_IDX_CPENABLE].reg_num,
+ XT_REG_A3));
reg_list[XT_REG_IDX_CPENABLE].dirty = false;
}
- preserve_a3 = (xtensa->core_config->windowed);
+ preserve_a3 = (xtensa->core_config->windowed) || (xtensa->core_config->core_type == XT_NX);
if (preserve_a3) {
/* Save (windowed) A3 for scratch use */
xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
if (res != ERROR_OK)
return res;
/* Grab the windowbase, we need it. */
- windowbase = xtensa_reg_get(target, XT_REG_IDX_WINDOWBASE);
+ uint32_t wb_idx = (xtensa->core_config->core_type == XT_LX) ?
+ XT_REG_IDX_WINDOWBASE : xtensa->nx_reg_idx[XT_NX_REG_IDX_WB];
+ windowbase = xtensa_reg_get(target, wb_idx);
+ if (xtensa->core_config->core_type == XT_NX)
+ windowbase = (windowbase & XT_WB_P_MSK) >> XT_WB_P_SHIFT;
+
/* Check if there are mismatches between the ARx and corresponding Ax registers.
* When the user sets a register on a windowed config, xt-gdb may set the ARx
* register directly. Thus we take ARx as priority over Ax if both are dirty
}
}
}
- /*Now rotate the window so we'll see the next 16 registers. The final rotate
- * will wraparound, */
- /*leaving us in the state we were. */
- xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, 4));
+
+ /* Now rotate the window so we'll see the next 16 registers. The final rotate
+ * will wraparound, leaving us in the state we were.
+ * Each ROTW rotates 4 registers on LX and 8 on NX */
+ int rotw_arg = (xtensa->core_config->core_type == XT_LX) ? 4 : 2;
+ xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, rotw_arg));
}
xtensa_window_state_restore(target, woe);
xtensa->scratch_ars[s].intval = false;
}
+ if (restore_ms) {
+ uint32_t ms_regno = xtensa->optregs[ms_idx - XT_NUM_REGS].reg_num;
+ xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, ms);
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, ms_regno, XT_REG_A3));
+ LOG_TARGET_DEBUG(target, "Delayed MS (0x%x) write complete: 0x%x", ms_regno, ms);
+ }
+
if (preserve_a3) {
xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, a3);
xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
reg->dirty = true;
}
+static int xtensa_imprecise_exception_occurred(struct target *target)
+{
+ struct xtensa *xtensa = target_to_xtensa(target);
+ for (enum xtensa_nx_reg_idx idx = XT_NX_REG_IDX_IEVEC; idx <= XT_NX_REG_IDX_MESR; idx++) {
+ enum xtensa_reg_id ridx = xtensa->nx_reg_idx[idx];
+ if (xtensa->nx_reg_idx[idx]) {
+ xtensa_reg_val_t reg = xtensa_reg_get(target, xtensa->nx_reg_idx[idx]);
+ if (reg & XT_IMPR_EXC_MSK) {
+ LOG_TARGET_DEBUG(target, "Imprecise exception: %s: 0x%x",
+ xtensa->core_cache->reg_list[ridx].name, reg);
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+static void xtensa_imprecise_exception_clear(struct target *target)
+{
+ struct xtensa *xtensa = target_to_xtensa(target);
+ for (enum xtensa_nx_reg_idx idx = XT_NX_REG_IDX_IEVEC; idx <= XT_NX_REG_IDX_MESRCLR; idx++) {
+ enum xtensa_reg_id ridx = xtensa->nx_reg_idx[idx];
+ if (ridx && idx != XT_NX_REG_IDX_MESR) {
+ xtensa_reg_val_t value = (idx == XT_NX_REG_IDX_MESRCLR) ? XT_MESRCLR_IMPR_EXC_MSK : 0;
+ xtensa_reg_set(target, ridx, value);
+ LOG_TARGET_DEBUG(target, "Imprecise exception: clearing %s (0x%x)",
+ xtensa->core_cache->reg_list[ridx].name, value);
+ }
+ }
+}
+
int xtensa_core_status_check(struct target *target)
{
struct xtensa *xtensa = target_to_xtensa(target);
- int res, needclear = 0;
+ int res, needclear = 0, needimprclear = 0;
xtensa_dm_core_status_read(&xtensa->dbg_mod);
xtensa_dsr_t dsr = xtensa_dm_core_status_get(&xtensa->dbg_mod);
dsr);
needclear = 1;
}
+ if (xtensa->core_config->core_type == XT_NX && (xtensa_imprecise_exception_occurred(target))) {
+ if (!xtensa->suppress_dsr_errors)
+ LOG_TARGET_ERROR(target,
+ "%s: Imprecise exception occurred!", target_name(target));
+ needclear = 1;
+ needimprclear = 1;
+ }
if (needclear) {
res = xtensa_dm_core_status_clear(&xtensa->dbg_mod,
OCDDSR_EXECEXCEPTION | OCDDSR_EXECOVERRUN);
if (res != ERROR_OK && !xtensa->suppress_dsr_errors)
LOG_TARGET_ERROR(target, "clearing DSR failed!");
+ if (xtensa->core_config->core_type == XT_NX && needimprclear)
+ xtensa_imprecise_exception_clear(target);
return ERROR_FAIL;
}
return ERROR_OK;
void xtensa_reg_set_deep_relgen(struct target *target, enum xtensa_reg_id a_idx, xtensa_reg_val_t value)
{
struct xtensa *xtensa = target_to_xtensa(target);
+ uint32_t wb_idx = (xtensa->core_config->core_type == XT_LX) ?
+ XT_REG_IDX_WINDOWBASE : xtensa->nx_reg_idx[XT_NX_REG_IDX_WB];
uint32_t windowbase = (xtensa->core_config->windowed ?
- xtensa_reg_get(target, XT_REG_IDX_WINDOWBASE) : 0);
+ xtensa_reg_get(target, wb_idx) : 0);
+ if (xtensa->core_config->core_type == XT_NX)
+ windowbase = (windowbase & XT_WB_P_MSK) >> XT_WB_P_SHIFT;
int ar_idx = xtensa_windowbase_offset_to_canonical(xtensa, a_idx, windowbase);
xtensa_reg_set(target, a_idx, value);
xtensa_reg_set(target, ar_idx, value);
/* Read cause for entering halted state; return bitmask in DEBUGCAUSE_* format */
uint32_t xtensa_cause_get(struct target *target)
{
- return xtensa_reg_get(target, XT_REG_IDX_DEBUGCAUSE);
+ struct xtensa *xtensa = target_to_xtensa(target);
+ if (xtensa->core_config->core_type == XT_LX) {
+ /* LX cause in DEBUGCAUSE */
+ return xtensa_reg_get(target, XT_REG_IDX_DEBUGCAUSE);
+ }
+ if (xtensa->nx_stop_cause & DEBUGCAUSE_VALID)
+ return xtensa->nx_stop_cause;
+
+ /* NX cause determined from DSR.StopCause */
+ if (xtensa_dm_core_status_read(&xtensa->dbg_mod) != ERROR_OK) {
+ LOG_TARGET_ERROR(target, "Read DSR error");
+ } else {
+ uint32_t dsr = xtensa_dm_core_status_get(&xtensa->dbg_mod);
+ /* NX causes are prioritized; only 1 bit can be set */
+ switch ((dsr & OCDDSR_STOPCAUSE) >> OCDDSR_STOPCAUSE_SHIFT) {
+ case OCDDSR_STOPCAUSE_DI:
+ xtensa->nx_stop_cause = DEBUGCAUSE_DI;
+ break;
+ case OCDDSR_STOPCAUSE_SS:
+ xtensa->nx_stop_cause = DEBUGCAUSE_IC;
+ break;
+ case OCDDSR_STOPCAUSE_IB:
+ xtensa->nx_stop_cause = DEBUGCAUSE_IB;
+ break;
+ case OCDDSR_STOPCAUSE_B:
+ case OCDDSR_STOPCAUSE_B1:
+ xtensa->nx_stop_cause = DEBUGCAUSE_BI;
+ break;
+ case OCDDSR_STOPCAUSE_BN:
+ xtensa->nx_stop_cause = DEBUGCAUSE_BN;
+ break;
+ case OCDDSR_STOPCAUSE_DB0:
+ case OCDDSR_STOPCAUSE_DB1:
+ xtensa->nx_stop_cause = DEBUGCAUSE_DB;
+ break;
+ default:
+ LOG_TARGET_ERROR(target, "Unknown stop cause (DSR: 0x%08x)", dsr);
+ break;
+ }
+ if (xtensa->nx_stop_cause)
+ xtensa->nx_stop_cause |= DEBUGCAUSE_VALID;
+ }
+ return xtensa->nx_stop_cause;
}
void xtensa_cause_clear(struct target *target)
{
struct xtensa *xtensa = target_to_xtensa(target);
- xtensa_reg_set(target, XT_REG_IDX_DEBUGCAUSE, 0);
- xtensa->core_cache->reg_list[XT_REG_IDX_DEBUGCAUSE].dirty = false;
+ if (xtensa->core_config->core_type == XT_LX) {
+ xtensa_reg_set(target, XT_REG_IDX_DEBUGCAUSE, 0);
+ xtensa->core_cache->reg_list[XT_REG_IDX_DEBUGCAUSE].dirty = false;
+ } else {
+ /* NX DSR.STOPCAUSE is not writeable; clear cached copy but leave it valid */
+ xtensa->nx_stop_cause = DEBUGCAUSE_VALID;
+ }
+}
+
+void xtensa_cause_reset(struct target *target)
+{
+ /* Clear DEBUGCAUSE_VALID to trigger re-read (on NX) */
+ struct xtensa *xtensa = target_to_xtensa(target);
+ xtensa->nx_stop_cause = 0;
}
int xtensa_assert_reset(struct target *target)
struct xtensa *xtensa = target_to_xtensa(target);
struct reg *reg_list = xtensa->core_cache->reg_list;
unsigned int reg_list_size = xtensa->core_cache->num_regs;
- xtensa_reg_val_t cpenable = 0, windowbase = 0, a3;
+ xtensa_reg_val_t cpenable = 0, windowbase = 0, a0 = 0, a3;
+ unsigned int ms_idx = reg_list_size;
+ uint32_t ms = 0;
uint32_t woe;
- uint8_t a3_buf[4];
+ uint8_t a0_buf[4], a3_buf[4], ms_buf[4];
bool debug_dsrs = !xtensa->regs_fetched || LOG_LEVEL_IS(LOG_LVL_DEBUG);
union xtensa_reg_val_u *regvals = calloc(reg_list_size, sizeof(*regvals));
/* Save (windowed) A3 so cache matches physical AR3; A3 usable as scratch */
xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
xtensa_queue_dbg_reg_read(xtensa, XDMREG_DDR, a3_buf);
+ if (xtensa->core_config->core_type == XT_NX) {
+ /* Save (windowed) A0 as well--it will be required for reading PC */
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A0));
+ xtensa_queue_dbg_reg_read(xtensa, XDMREG_DDR, a0_buf);
+
+ /* Set MS.DispSt, clear MS.DE prior to accessing ARs. This ensures ARs remain
+ * in correct order even for reversed register groups (overflow/underflow).
+ */
+ ms_idx = xtensa->nx_reg_idx[XT_NX_REG_IDX_MS];
+ uint32_t ms_regno = xtensa->optregs[ms_idx - XT_NUM_REGS].reg_num;
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, ms_regno, XT_REG_A3));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
+ xtensa_queue_dbg_reg_read(xtensa, XDMREG_DDR, ms_buf);
+ LOG_TARGET_DEBUG(target, "Overriding MS (0x%x): 0x%x", ms_regno, XT_MS_DISPST_DBG);
+ xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, XT_MS_DISPST_DBG);
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, ms_regno, XT_REG_A3));
+ }
+
int res = xtensa_window_state_save(target, &woe);
if (res != ERROR_OK)
goto xtensa_fetch_all_regs_done;
dsrs[XT_REG_IDX_AR0 + i + j].buf);
}
}
- if (xtensa->core_config->windowed)
+ if (xtensa->core_config->windowed) {
/* Now rotate the window so we'll see the next 16 registers. The final rotate
- * will wraparound, */
- /* leaving us in the state we were. */
- xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, 4));
+ * will wraparound, leaving us in the state we were.
+ * Each ROTW rotates 4 registers on LX and 8 on NX */
+ int rotw_arg = (xtensa->core_config->core_type == XT_LX) ? 4 : 2;
+ xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, rotw_arg));
+ }
}
xtensa_window_state_restore(target, woe);
xtensa_core_status_check(target);
a3 = buf_get_u32(a3_buf, 0, 32);
+ if (xtensa->core_config->core_type == XT_NX) {
+ a0 = buf_get_u32(a0_buf, 0, 32);
+ ms = buf_get_u32(ms_buf, 0, 32);
+ }
if (xtensa->core_config->coproc) {
cpenable = buf_get_u32(regvals[XT_REG_IDX_CPENABLE].buf, 0, 32);
break;
case XT_REG_SPECIAL:
if (reg_num == XT_PC_REG_NUM_VIRTUAL) {
- /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
- reg_num = XT_EPC_REG_NUM_BASE + xtensa->core_config->debug.irq_level;
- } else if (reg_num == xtensa_regs[XT_REG_IDX_PS].reg_num) {
+ if (xtensa->core_config->core_type == XT_LX) {
+ /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
+ reg_num = XT_EPC_REG_NUM_BASE + xtensa->core_config->debug.irq_level;
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, reg_num, XT_REG_A3));
+ } else {
+ /* NX PC read through CALL0(0) and reading A0 */
+ xtensa_queue_exec_ins(xtensa, XT_INS_CALL0(xtensa, 0));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A0));
+ xtensa_queue_dbg_reg_read(xtensa, XDMREG_DDR, regvals[i].buf);
+ xtensa_queue_dbg_reg_read(xtensa, XDMREG_DSR, dsrs[i].buf);
+ reg_fetched = false;
+ }
+ } else if ((xtensa->core_config->core_type == XT_LX)
+ && (reg_num == xtensa_regs[XT_REG_IDX_PS].reg_num)) {
/* reg number of PS for debug interrupt depends on NDEBUGLEVEL */
reg_num = XT_EPS_REG_NUM_BASE + xtensa->core_config->debug.irq_level;
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, reg_num, XT_REG_A3));
} else if (reg_num == xtensa_regs[XT_REG_IDX_CPENABLE].reg_num) {
/* CPENABLE already read/updated; don't re-read */
reg_fetched = false;
break;
+ } else {
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, reg_num, XT_REG_A3));
}
- xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, reg_num, XT_REG_A3));
break;
default:
reg_fetched = false;
}
}
- if (xtensa->core_config->windowed)
+ if (xtensa->core_config->windowed) {
/* We need the windowbase to decode the general addresses. */
- windowbase = buf_get_u32(regvals[XT_REG_IDX_WINDOWBASE].buf, 0, 32);
+ uint32_t wb_idx = (xtensa->core_config->core_type == XT_LX) ?
+ XT_REG_IDX_WINDOWBASE : xtensa->nx_reg_idx[XT_NX_REG_IDX_WB];
+ windowbase = buf_get_u32(regvals[wb_idx].buf, 0, 32);
+ if (xtensa->core_config->core_type == XT_NX)
+ windowbase = (windowbase & XT_WB_P_MSK) >> XT_WB_P_SHIFT;
+ }
+
/* Decode the result and update the cache. */
for (unsigned int i = 0; i < reg_list_size; i++) {
struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
bool is_dirty = (i == XT_REG_IDX_CPENABLE);
if (xtensa_extra_debug_log)
LOG_INFO("Register %s: 0x%X", reg_list[i].name, regval);
+ if (rlist[ridx].reg_num == XT_PC_REG_NUM_VIRTUAL &&
+ xtensa->core_config->core_type == XT_NX) {
+ /* A0 from prior CALL0 points to next instruction; decrement it */
+ regval -= 3;
+ is_dirty = 1;
+ } else if (i == ms_idx) {
+ LOG_TARGET_DEBUG(target, "Caching MS: 0x%x", ms);
+ regval = ms;
+ is_dirty = 1;
+ }
xtensa_reg_set(target, i, regval);
reg_list[i].dirty = is_dirty; /*always do this _after_ xtensa_reg_set! */
}
/* We have used A3 (XT_REG_RELGEN) as a scratch register. Restore and flag for write-back. */
xtensa_reg_set(target, XT_REG_IDX_A3, a3);
xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
+ if (xtensa->core_config->core_type == XT_NX) {
+ xtensa_reg_set(target, XT_REG_IDX_A0, a0);
+ xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A0);
+ }
+
xtensa->regs_fetched = true;
xtensa_fetch_all_regs_done:
free(regvals);
struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
int sparse_idx = rlist[ridx].dbreg_num;
- if (i == XT_REG_IDX_PS) {
+ if (i == XT_REG_IDX_PS && xtensa->core_config->core_type == XT_LX) {
if (xtensa->eps_dbglevel_idx == 0) {
LOG_ERROR("eps_dbglevel_idx not set\n");
return ERROR_FAIL;
if (xtensa->hw_brps[slot]) {
/* Write IBREAKA[slot] and set bit #slot in IBREAKENABLE */
xtensa_reg_set(target, XT_REG_IDX_IBREAKA0 + slot, xtensa->hw_brps[slot]->address);
+ if (xtensa->core_config->core_type == XT_NX)
+ xtensa_reg_set(target, xtensa->nx_reg_idx[XT_NX_REG_IDX_IBREAKC0] + slot, XT_IBREAKC_FB);
bpena |= BIT(slot);
}
}
- xtensa_reg_set(target, XT_REG_IDX_IBREAKENABLE, bpena);
+ if (xtensa->core_config->core_type == XT_LX)
+ xtensa_reg_set(target, XT_REG_IDX_IBREAKENABLE, bpena);
/* Here we write all registers to the targets */
int res = xtensa_write_dirty_registers(target);
LOG_TARGET_DEBUG(target, "start");
+ xtensa_cause_reset(target);
xtensa_queue_exec_ins(xtensa, XT_INS_RFDO(xtensa));
int res = xtensa_dm_queue_execute(&xtensa->dbg_mod);
if (res != ERROR_OK) {
return ERROR_TARGET_NOT_HALTED;
}
- if (xtensa->eps_dbglevel_idx == 0) {
- LOG_ERROR("eps_dbglevel_idx not set\n");
+ if (xtensa->eps_dbglevel_idx == 0 && xtensa->core_config->core_type == XT_LX) {
+ LOG_TARGET_ERROR(target, "eps_dbglevel_idx not set\n");
return ERROR_FAIL;
}
/* Save old ps (EPS[dbglvl] on LX), pc */
- oldps = xtensa_reg_get(target, xtensa->eps_dbglevel_idx);
+ oldps = xtensa_reg_get(target, (xtensa->core_config->core_type == XT_LX) ?
+ xtensa->eps_dbglevel_idx : XT_REG_IDX_PS);
oldpc = xtensa_reg_get(target, XT_REG_IDX_PC);
cause = xtensa_cause_get(target);
if (!handle_breakpoints && (cause & (DEBUGCAUSE_BI | DEBUGCAUSE_BN)))
/* handle normal SW breakpoint */
xtensa_cause_clear(target); /* so we don't recurse into the same routine */
- if ((oldps & 0xf) >= icountlvl) {
+ if (xtensa->core_config->core_type == XT_LX && ((oldps & 0xf) >= icountlvl)) {
/* Lower interrupt level to allow stepping, but flag eps[dbglvl] to be restored */
ps_lowered = true;
uint32_t newps = (oldps & ~0xf) | (icountlvl - 1);
oldps);
}
do {
- xtensa_reg_set(target, XT_REG_IDX_ICOUNTLEVEL, icountlvl);
- xtensa_reg_set(target, XT_REG_IDX_ICOUNT, icount_val);
+ if (xtensa->core_config->core_type == XT_LX) {
+ xtensa_reg_set(target, XT_REG_IDX_ICOUNTLEVEL, icountlvl);
+ xtensa_reg_set(target, XT_REG_IDX_ICOUNT, icount_val);
+ } else {
+ xtensa_queue_dbg_reg_write(xtensa, XDMREG_DCRSET, OCDDCR_STEPREQUEST);
+ }
- /* Now ICOUNT is set, we can resume as if we were going to run */
+ /* Now that ICOUNT (LX) or DCR.StepRequest (NX) is set,
+ * we can resume as if we were going to run
+ */
res = xtensa_prepare_resume(target, current, address, 0, 0);
if (res != ERROR_OK) {
LOG_TARGET_ERROR(target, "Failed to prepare resume for single step");
OCDDSR_DEBUGPENDBREAK | OCDDSR_DEBUGINTBREAK | OCDDSR_DEBUGPENDTRAX |
OCDDSR_DEBUGINTTRAX |
OCDDSR_DEBUGPENDHOST | OCDDSR_DEBUGINTHOST);
+ if (xtensa->core_config->core_type == XT_NX) {
+ /* Enable imprecise exceptions while in halted state */
+ xtensa_reg_val_t ps = xtensa_reg_get(target, XT_REG_IDX_PS);
+ xtensa_reg_val_t newps = ps & ~(XT_PS_DIEXC_MSK);
+ xtensa_mark_register_dirty(xtensa, XT_REG_IDX_PS);
+ LOG_TARGET_DEBUG(target, "Enabling PS.DIEXC: 0x%08x -> 0x%08x", ps, newps);
+ xtensa_queue_dbg_reg_write(xtensa, XDMREG_DDR, newps);
+ xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
+ xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_PS, XT_REG_A3));
+ res = xtensa_dm_queue_execute(&xtensa->dbg_mod);
+ if (res != ERROR_OK) {
+ LOG_TARGET_ERROR(target, "Failed to write PS.DIEXC (%d)!", res);
+ return res;
+ }
+ xtensa_core_status_check(target);
+ }
}
} else {
target->debug_reason = DBG_REASON_NOTHALTED;
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
xtensa->hw_brps[slot] = NULL;
+ if (xtensa->core_config->core_type == XT_NX)
+ xtensa_reg_set(target, xtensa->nx_reg_idx[XT_NX_REG_IDX_IBREAKC0] + slot, 0);
LOG_TARGET_DEBUG(target, "cleared HW breakpoint %u @ " TARGET_ADDR_FMT, slot, breakpoint->address);
return ERROR_OK;
}
const char *core_name = CMD_ARGV[0];
if (strcasecmp(core_name, "LX") == 0) {
xtensa->core_config->core_type = XT_LX;
+ } else if (strcasecmp(core_name, "NX") == 0) {
+ xtensa->core_config->core_type = XT_NX;
} else {
- LOG_ERROR("xtdef [LX]\n");
+ LOG_ERROR("xtdef [LX|NX]\n");
return ERROR_COMMAND_SYNTAX_ERROR;
}
return ERROR_OK;
xtensa->eps_dbglevel_idx = XT_NUM_REGS + xtensa->num_optregs - 1;
LOG_DEBUG("Setting PS (%s) index to %d", rptr->name, xtensa->eps_dbglevel_idx);
}
+ if (xtensa->core_config->core_type == XT_NX) {
+ enum xtensa_nx_reg_idx idx = XT_NX_REG_IDX_NUM;
+ if (strcmp(rptr->name, "ibreakc0") == 0)
+ idx = XT_NX_REG_IDX_IBREAKC0;
+ else if (strcmp(rptr->name, "wb") == 0)
+ idx = XT_NX_REG_IDX_WB;
+ else if (strcmp(rptr->name, "ms") == 0)
+ idx = XT_NX_REG_IDX_MS;
+ else if (strcmp(rptr->name, "ievec") == 0)
+ idx = XT_NX_REG_IDX_IEVEC;
+ else if (strcmp(rptr->name, "ieextern") == 0)
+ idx = XT_NX_REG_IDX_IEEXTERN;
+ else if (strcmp(rptr->name, "mesr") == 0)
+ idx = XT_NX_REG_IDX_MESR;
+ else if (strcmp(rptr->name, "mesrclr") == 0)
+ idx = XT_NX_REG_IDX_MESRCLR;
+ if (idx < XT_NX_REG_IDX_NUM) {
+ if (xtensa->nx_reg_idx[idx] != 0) {
+ LOG_ERROR("nx_reg_idx[%d] previously set to %d",
+ idx, xtensa->nx_reg_idx[idx]);
+ return ERROR_FAIL;
+ }
+ xtensa->nx_reg_idx[idx] = XT_NUM_REGS + xtensa->num_optregs - 1;
+ LOG_DEBUG("NX reg %s: index %d (%d)",
+ rptr->name, xtensa->nx_reg_idx[idx], idx);
+ }
+ }
} else if (strcmp(rptr->name, "cpenable") == 0) {
xtensa->core_config->coproc = true;
}
command_print(CMD, "Current ISR step mode: %s", st);
return ERROR_OK;
}
+
+ if (xtensa->core_config->core_type == XT_NX) {
+ command_print(CMD, "ERROR: ISR step mode only supported on Xtensa LX");
+ return ERROR_FAIL;
+ }
+
/* Masking is ON -> interrupts during stepping are OFF, and vice versa */
if (!strcasecmp(CMD_ARGV[0], "off"))
state = XT_STEPPING_ISR_ON;
Code Review / openocd.git / commitdiff