|
- /*
- * MIPS64 generic target support
- *
- * Copyright (C) 2014 by Andrey Sidorov <anysidorov@gmail.com>
- * Copyright (C) 2014 by Aleksey Kuleshov <rndfax@yandex.ru>
- * Copyright (C) 2014-2019 by Peter Mamonov <pmamonov@gmail.com>
- *
- * Based on the work of:
- * Copyright (C) 2008 by Spencer Oliver
- * Copyright (C) 2008 by David T.L. Wong
- *
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "breakpoints.h"
- #include "mips32.h"
- #include "mips64.h"
- #include "mips_mips64.h"
- #include "target_type.h"
- #include "register.h"
-
- static int mips_mips64_unset_breakpoint(struct target *target,
- struct breakpoint *breakpoint);
-
- static uint64_t mips64_extend_sign(uint64_t addr)
- {
- if (addr >> 32)
- return addr;
- if (addr >> 31)
- return addr | (ULLONG_MAX << 32);
- return addr;
- }
-
- static int mips_mips64_examine_debug_reason(struct target *target)
- {
- if ((target->debug_reason != DBG_REASON_DBGRQ)
- && (target->debug_reason != DBG_REASON_SINGLESTEP))
- target->debug_reason = DBG_REASON_BREAKPOINT;
-
- return ERROR_OK;
- }
-
- static int mips_mips64_debug_entry(struct target *target)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- struct reg *pc = &mips64->core_cache->reg_list[MIPS64_PC];
-
- mips64_save_context(target);
-
- /* make sure stepping disabled, SSt bit in CP0 debug register cleared */
- mips64_ejtag_config_step(ejtag_info, 0);
-
- /* make sure break unit configured */
- mips64_configure_break_unit(target);
-
- /* attempt to find halt reason */
- mips_mips64_examine_debug_reason(target);
-
- LOG_DEBUG("entered debug state at PC 0x%" PRIx64 ", target->state: %s",
- buf_get_u64(pc->value, 0, 64), target_state_name(target));
-
- return ERROR_OK;
- }
-
- static int mips_mips64_poll(struct target *target)
- {
- int retval;
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- uint32_t ejtag_ctrl = ejtag_info->ejtag_ctrl;
-
- /* read ejtag control reg */
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
- mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
-
- /* clear this bit before handling polling
- * as after reset registers will read zero */
- if (ejtag_ctrl & EJTAG_CTRL_ROCC) {
- /* we have detected a reset, clear flag
- * otherwise ejtag will not work */
- ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_ROCC;
-
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
- mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
- LOG_DEBUG("Reset Detected");
- }
-
- /* check for processor halted */
- if (ejtag_ctrl & EJTAG_CTRL_BRKST) {
- if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET)) {
- target->state = TARGET_HALTED;
- retval = mips_mips64_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
- } else if (target->state == TARGET_DEBUG_RUNNING) {
- target->state = TARGET_HALTED;
- retval = mips_mips64_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
-
- target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
- }
- } else {
- target->state = TARGET_RUNNING;
- }
-
- return ERROR_OK;
- }
-
- static int mips_mips64_halt(struct target *target)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
-
- LOG_DEBUG("target->state: %s",
- target_state_name(target));
-
- if (target->state == TARGET_HALTED) {
- LOG_DEBUG("target was already halted");
- return ERROR_OK;
- }
-
- if (target->state == TARGET_UNKNOWN)
- LOG_WARNING("target was in unknown state when halt was requested");
-
- if (target->state == TARGET_RESET) {
- if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) && jtag_get_srst()) {
- LOG_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 mips64_prepare_reset_halt()
- */
- target->debug_reason = DBG_REASON_DBGRQ;
-
- return ERROR_OK;
- }
- }
-
- /* break processor */
- mips_ejtag_enter_debug(ejtag_info);
-
- target->debug_reason = DBG_REASON_DBGRQ;
-
- return ERROR_OK;
- }
-
- static int mips_mips64_assert_reset(struct target *target)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- int retval;
-
- LOG_DEBUG("target->state: %s",
- target_state_name(target));
-
- enum reset_types jtag_reset_config = jtag_get_reset_config();
- if (!(jtag_reset_config & RESET_HAS_SRST)) {
- LOG_ERROR("Can't assert SRST");
- return ERROR_FAIL;
- }
-
- if (target->reset_halt)
- /* use hardware to catch reset */
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_EJTAGBOOT);
- else
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_NORMALBOOT);
-
- /* here we should issue a srst only, but we may have to assert trst as well */
- if (jtag_reset_config & RESET_SRST_PULLS_TRST)
- jtag_add_reset(1, 1);
- else
- jtag_add_reset(0, 1);
-
- target->state = TARGET_RESET;
- jtag_add_sleep(5000);
-
- retval = mips64_invalidate_core_regs(target);
- if (retval != ERROR_OK)
- return retval;
-
- if (target->reset_halt) {
- retval = target_halt(target);
- if (retval != ERROR_OK)
- return retval;
- }
-
- return ERROR_OK;
- }
-
- static int mips_mips64_deassert_reset(struct target *target)
- {
- LOG_DEBUG("target->state: %s",
- target_state_name(target));
-
- /* deassert reset lines */
- jtag_add_reset(0, 0);
-
- return ERROR_OK;
- }
-
- static int mips_mips64_soft_reset_halt(struct target *target)
- {
- /* TODO */
- return ERROR_OK;
- }
-
- static int mips_mips64_single_step_core(struct target *target)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- int retval;
-
- /* configure single step mode */
- mips64_ejtag_config_step(ejtag_info, 1);
-
- /* disable interrupts while stepping */
- retval = mips64_enable_interrupts(target, false);
- if (retval != ERROR_OK)
- return retval;
-
- /* exit debug mode */
- retval = mips64_ejtag_exit_debug(ejtag_info);
- if (retval != ERROR_OK)
- return retval;
-
- mips_mips64_debug_entry(target);
-
- return ERROR_OK;
- }
-
- /* TODO: HW breakpoints are in EJTAG spec. Should we share it for MIPS32? */
- static int mips_mips64_set_hwbp(struct target *target, struct breakpoint *bp)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips64_comparator *c, *cl = mips64->inst_break_list;
- uint64_t bp_value;
- int retval, bp_num = 0;
-
- while (cl[bp_num].used && (bp_num < mips64->num_inst_bpoints))
- bp_num++;
-
- if (bp_num >= mips64->num_inst_bpoints) {
- LOG_DEBUG("ERROR Can not find free FP Comparator(bpid: %" PRIu32 ")",
- bp->unique_id);
- LOG_WARNING("ERROR Can not find free FP Comparator");
- exit(-1);
- }
-
- c = &cl[bp_num];
- c->used = true;
- c->bp_value = bp->address;
- bp_value = bp->address;
-
- /* Instruction Breakpoint Address n (IBAn) Register */
- retval = target_write_u64(target, c->reg_address, bp_value);
- if (retval != ERROR_OK)
- return retval;
-
- /* TODO: use defines */
- /* Instruction Breakpoint Address Mask n (IBMn) Register */
- retval = target_write_u64(target, c->reg_address + 0x08, 0);
- if (retval != ERROR_OK)
- return retval;
-
- /* Instruction Breakpoint Control n (IBCn) Register */
- retval = target_write_u64(target, c->reg_address + 0x18, 1);
- if (retval != ERROR_OK)
- return retval;
-
- LOG_DEBUG("bpid: %" PRIu32 ", bp_num %i bp_value 0x%" PRIx64, bp->unique_id,
- bp_num, c->bp_value);
-
- return ERROR_OK;
- }
-
- /* TODO: is it MIPS64 or MIPS32 instruction. If MIPS32, can it be shared with
- * MIPS32 code? */
- static int mips_mips64_set_sdbbp(struct target *target, struct breakpoint *bp)
- {
- uint32_t verify;
- int retval;
-
- retval = target_read_memory(target,
- bp->address, bp->length, 1,
- bp->orig_instr);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, bp->address, MIPS64_SDBBP);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_read_u32(target, bp->address, &verify);
- if (retval != ERROR_OK)
- return retval;
-
- if (verify != MIPS64_SDBBP) {
- LOG_ERROR("Unable to set 32bit breakpoint at address %16" PRIx64,
- bp->address);
- retval = ERROR_FAIL;
- }
-
- return retval;
- }
-
- /* TODO do MIPS64 support MIPS16 instructions? Can it be shared with MIPS32
- * code? */
- static int mips_mips16_set_sdbbp(struct target *target, struct breakpoint *bp)
- {
- uint32_t isa_req = bp->length & 1;
- uint16_t verify;
- int retval;
-
- retval = target_read_memory(target,
- bp->address, bp->length, 1,
- bp->orig_instr);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u16(target, bp->address, MIPS16_SDBBP(isa_req));
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_read_u16(target, bp->address, &verify);
- if (retval != ERROR_OK)
- return retval;
-
- if (verify != MIPS16_SDBBP(isa_req)) {
- LOG_ERROR("Unable to set 16bit breakpoint at address %16" PRIx64,
- bp->address);
- retval = ERROR_FAIL;
- }
-
- return retval;
- }
-
- static int mips_mips64_set_breakpoint(struct target *target,
- struct breakpoint *bp)
- {
- int retval;
-
- if (bp->set) {
- LOG_WARNING("breakpoint already set");
- return ERROR_OK;
- }
-
- if (bp->type == BKPT_HARD) {
- retval = mips_mips64_set_hwbp(target, bp);
- } else {
- LOG_DEBUG("bpid: %" PRIu32, bp->unique_id);
-
- switch (bp->length) {
- case MIPS64_SDBBP_SIZE:
- retval = mips_mips64_set_sdbbp(target, bp);
- break;
- case MIPS16_SDBBP_SIZE:
- retval = mips_mips16_set_sdbbp(target, bp);
- break;
- default:
- retval = ERROR_FAIL;
- }
- }
-
- if (retval != ERROR_OK) {
- LOG_ERROR("can't unset breakpoint. Some thing wrong happened");
- return retval;
- }
-
- bp->set = true;
-
- return ERROR_OK;
- }
-
- static int mips_mips64_enable_breakpoints(struct target *target)
- {
- struct breakpoint *bp = target->breakpoints;
- int retval = ERROR_OK;
-
- /* set any pending breakpoints */
- while (bp) {
- if (!bp->set) {
- retval = mips_mips64_set_breakpoint(target, bp);
- if (retval != ERROR_OK)
- return retval;
- }
- bp = bp->next;
- }
-
- return ERROR_OK;
- }
-
- /* TODO: HW data breakpoints are in EJTAG spec. Should we share it for MIPS32? */
- static int mips_mips64_set_watchpoint(struct target *target,
- struct watchpoint *watchpoint)
- {
- uint64_t wp_value;
- struct mips64_common *mips64 = target->arch_info;
- struct mips64_comparator *c, *cl = mips64->data_break_list;
- int retval, wp_num = 0;
-
- /*
- * watchpoint enabled, ignore all byte lanes in value register
- * and exclude both load and store accesses from watchpoint
- * condition evaluation
- */
- int enable = EJTAG_DBCN_NOSB | EJTAG_DBCN_NOLB | EJTAG_DBCN_BE
- | (0xff << EJTAG_DBCN_BLM_SHIFT);
-
- if (watchpoint->set) {
- LOG_WARNING("watchpoint already set");
- return ERROR_OK;
- }
-
- while (cl[wp_num].used && (wp_num < mips64->num_data_bpoints))
- wp_num++;
-
- if (wp_num >= mips64->num_data_bpoints) {
- LOG_ERROR("ERROR Can not find free comparator");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- if (watchpoint->length != 4) {
- LOG_ERROR("Only watchpoints of length 4 are supported");
- return ERROR_TARGET_UNALIGNED_ACCESS;
- }
-
- if (watchpoint->address % 4) {
- LOG_ERROR("Watchpoints address should be word aligned");
- return ERROR_TARGET_UNALIGNED_ACCESS;
- }
-
- switch (watchpoint->rw) {
- case WPT_READ:
- enable &= ~EJTAG_DBCN_NOLB;
- break;
- case WPT_WRITE:
- enable &= ~EJTAG_DBCN_NOSB;
- break;
- case WPT_ACCESS:
- enable &= ~(EJTAG_DBCN_NOLB | EJTAG_DBCN_NOSB);
- break;
- default:
- LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
- }
-
- c = &cl[wp_num];
- watchpoint->set = wp_num + 1;
- c->used = true;
- c->bp_value = watchpoint->address;
-
- wp_value = watchpoint->address;
- if (wp_value & 0x80000000)
- wp_value |= ULLONG_MAX << 32;
-
- retval = target_write_u64(target, c->reg_address, wp_value);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u64(target, c->reg_address + 0x08, 0);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u64(target, c->reg_address + 0x10, 0);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u64(target, c->reg_address + 0x18, enable);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u64(target, c->reg_address + 0x20, 0);
- if (retval != ERROR_OK)
- return retval;
-
- LOG_DEBUG("wp_num %i bp_value 0x%" PRIx64 "", wp_num, c->bp_value);
-
- return ERROR_OK;
- }
-
- static int mips_mips64_enable_watchpoints(struct target *target)
- {
- struct watchpoint *watchpoint = target->watchpoints;
- int retval;
-
- /* set any pending watchpoints */
- while (watchpoint) {
- if (watchpoint->set == 0) {
- retval = mips_mips64_set_watchpoint(target, watchpoint);
- if (retval != ERROR_OK)
- return retval;
- }
- watchpoint = watchpoint->next;
- }
-
- return ERROR_OK;
- }
-
- static int mips_mips64_unset_hwbp(struct target *target, struct breakpoint *bp)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips64_comparator *comparator_list = mips64->inst_break_list;
- int bp_num;
-
- bp_num = bp->set - 1;
-
- if ((bp_num < 0) || (bp_num >= mips64->num_inst_bpoints)) {
- LOG_DEBUG("Invalid FP Comparator number in breakpoint (bpid: %" PRIu32 ")",
- bp->unique_id);
- return ERROR_OK;
- }
-
- LOG_DEBUG("bpid: %" PRIu32 " - releasing hw: %d", bp->unique_id, bp_num);
- comparator_list[bp_num].used = false;
- comparator_list[bp_num].bp_value = 0;
-
- return target_write_u64(target,
- comparator_list[bp_num].reg_address + 0x18, 0);
- }
-
- static int mips_mips64_unset_sdbbp(struct target *target, struct breakpoint *bp)
- {
- uint8_t buf[MIPS64_SDBBP_SIZE];
- uint32_t instr;
- int retval;
-
- retval = target_read_memory(target, bp->address, MIPS64_SDBBP_SIZE, 1,
- &buf[0]);
- if (retval != ERROR_OK)
- return retval;
-
- instr = target_buffer_get_u32(target, &buf[0]);
- if (instr != MIPS64_SDBBP)
- return ERROR_OK;
-
- return target_write_memory(target, bp->address, MIPS64_SDBBP_SIZE, 1,
- bp->orig_instr);
- }
-
- static int mips_mips16_unset_sdbbp(struct target *target, struct breakpoint *bp)
- {
- uint8_t buf[MIPS16_SDBBP_SIZE];
- uint16_t instr;
- int retval;
-
- retval = target_read_memory(target, bp->address, MIPS16_SDBBP_SIZE, 1,
- &buf[0]);
- if (retval != ERROR_OK)
- return retval;
-
- instr = target_buffer_get_u16(target, &buf[0]);
- if (instr != MIPS16_SDBBP(bp->length & 1))
- return ERROR_OK;
-
- return target_write_memory(target, bp->address, MIPS16_SDBBP_SIZE, 1,
- bp->orig_instr);
- }
-
- static int mips_mips64_unset_breakpoint(struct target *target,
- struct breakpoint *bp)
- {
- /* get pointers to arch-specific information */
- int retval;
-
- if (!bp->set) {
- LOG_WARNING("breakpoint not set");
- return ERROR_OK;
- }
-
- if (bp->type == BKPT_HARD) {
- retval = mips_mips64_unset_hwbp(target, bp);
- } else {
- LOG_DEBUG("bpid: %" PRIu32, bp->unique_id);
-
- switch (bp->length) {
- case MIPS64_SDBBP_SIZE:
- retval = mips_mips64_unset_sdbbp(target, bp);
- break;
- case MIPS16_SDBBP_SIZE:
- retval = mips_mips16_unset_sdbbp(target, bp);
- break;
- default:
- retval = ERROR_FAIL;
- }
- }
- if (retval != ERROR_OK) {
- LOG_ERROR("can't unset breakpoint. Some thing wrong happened");
- return retval;
- }
-
- bp->set = false;
-
- return ERROR_OK;
- }
-
- static int mips_mips64_resume(struct target *target, int current,
- uint64_t address, int handle_breakpoints,
- int debug_execution)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- int retval = ERROR_OK;
- uint64_t resume_pc;
- struct reg *pc;
-
- if (mips64->mips64mode32)
- address = mips64_extend_sign(address);
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted %d", target->state);
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (!debug_execution) {
- target_free_all_working_areas(target);
- retval = mips_mips64_enable_breakpoints(target);
- if (retval != ERROR_OK)
- return retval;
-
- retval = mips_mips64_enable_watchpoints(target);
- if (retval != ERROR_OK)
- return retval;
- }
-
- pc = &mips64->core_cache->reg_list[MIPS64_PC];
- /* current = 1: continue on current pc, otherwise continue at <address> */
- if (!current) {
- buf_set_u64(pc->value, 0, 64, address);
- pc->dirty = 1;
- pc->valid = 1;
- }
-
- resume_pc = buf_get_u64(pc->value, 0, 64);
-
- retval = mips64_restore_context(target);
- if (retval != ERROR_OK)
- return retval;
-
- /* the front-end may request us not to handle breakpoints */
- if (handle_breakpoints) {
- struct breakpoint *bp;
-
- /* Single step past breakpoint at current address */
- bp = breakpoint_find(target, (uint64_t) resume_pc);
- if (bp) {
- LOG_DEBUG("unset breakpoint at 0x%16.16" PRIx64 "",
- bp->address);
- retval = mips_mips64_unset_breakpoint(target, bp);
- if (retval != ERROR_OK)
- return retval;
-
- retval = mips_mips64_single_step_core(target);
- if (retval != ERROR_OK)
- return retval;
-
- retval = mips_mips64_set_breakpoint(target, bp);
- if (retval != ERROR_OK)
- return retval;
- }
- }
-
- /* enable interrupts if we are running */
- retval = mips64_enable_interrupts(target, !debug_execution);
- if (retval != ERROR_OK)
- return retval;
-
- /* exit debug mode */
- retval = mips64_ejtag_exit_debug(ejtag_info);
- if (retval != ERROR_OK)
- return retval;
-
- target->debug_reason = DBG_REASON_NOTHALTED;
-
- /* registers are now invalid */
- retval = mips64_invalidate_core_regs(target);
- if (retval != ERROR_OK)
- return retval;
-
- if (!debug_execution) {
- target->state = TARGET_RUNNING;
- retval = target_call_event_callbacks(target,
- TARGET_EVENT_RESUMED);
- if (retval != ERROR_OK)
- return retval;
-
- LOG_DEBUG("target resumed at 0x%" PRIx64 "", resume_pc);
- } else {
- target->state = TARGET_DEBUG_RUNNING;
- retval = target_call_event_callbacks(target,
- TARGET_EVENT_DEBUG_RESUMED);
- if (retval != ERROR_OK)
- return retval;
-
- LOG_DEBUG("target debug resumed at 0x%" PRIx64 "", resume_pc);
- }
-
- return ERROR_OK;
- }
-
- static int mips_mips64_step(struct target *target, int current,
- uint64_t address, int handle_breakpoints)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- struct reg *pc = &mips64->core_cache->reg_list[MIPS64_PC];
- struct breakpoint *bp = NULL;
- int retval = ERROR_OK;
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (mips64->mips64mode32)
- address = mips64_extend_sign(address);
-
- /* current = 1: continue on current pc, otherwise continue at
- * <address> */
- if (!current) {
- buf_set_u64(pc->value, 0, 64, address);
- pc->dirty = 1;
- pc->valid = 1;
- }
-
- /* the front-end may request us not to handle breakpoints */
- if (handle_breakpoints) {
- bp = breakpoint_find(target, buf_get_u64(pc->value, 0, 64));
- if (bp) {
- retval = mips_mips64_unset_breakpoint(target, bp);
- if (retval != ERROR_OK)
- return retval;
- }
- }
-
- retval = mips64_restore_context(target);
- if (retval != ERROR_OK)
- return retval;
-
- /* configure single step mode */
- retval = mips64_ejtag_config_step(ejtag_info, 1);
- if (retval != ERROR_OK)
- return retval;
-
- target->debug_reason = DBG_REASON_SINGLESTEP;
-
- retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
- if (retval != ERROR_OK)
- return retval;
-
- /* disable interrupts while stepping */
- retval = mips64_enable_interrupts(target, false);
- if (retval != ERROR_OK)
- return retval;
-
- /* exit debug mode */
- retval = mips64_ejtag_exit_debug(ejtag_info);
- if (retval != ERROR_OK)
- return retval;
-
- /* registers are now invalid */
- retval = mips64_invalidate_core_regs(target);
- if (retval != ERROR_OK)
- return retval;
-
- if (bp) {
- retval = mips_mips64_set_breakpoint(target, bp);
- if (retval != ERROR_OK)
- return retval;
- }
-
- LOG_DEBUG("target stepped ");
-
- retval = mips_mips64_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
-
- return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
- }
-
- static int mips_mips64_add_breakpoint(struct target *target,
- struct breakpoint *bp)
- {
- struct mips64_common *mips64 = target->arch_info;
-
- if (mips64->mips64mode32)
- bp->address = mips64_extend_sign(bp->address);
-
- if (bp->type == BKPT_HARD) {
- if (mips64->num_inst_bpoints_avail < 1) {
- LOG_INFO("no hardware breakpoint available");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- mips64->num_inst_bpoints_avail--;
- }
-
- return mips_mips64_set_breakpoint(target, bp);
- }
-
- static int mips_mips64_remove_breakpoint(struct target *target,
- struct breakpoint *bp)
- {
- /* get pointers to arch-specific information */
- struct mips64_common *mips64 = target->arch_info;
- int retval = ERROR_OK;
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (bp->set)
- retval = mips_mips64_unset_breakpoint(target, bp);
-
- if (bp->type == BKPT_HARD)
- mips64->num_inst_bpoints_avail++;
-
- return retval;
- }
-
- static int mips_mips64_unset_watchpoint(struct target *target,
- struct watchpoint *watchpoint)
- {
- /* get pointers to arch-specific information */
- struct mips64_common *mips64 = target->arch_info;
- struct mips64_comparator *comparator_list = mips64->data_break_list;
-
- if (!watchpoint->set) {
- LOG_WARNING("watchpoint not set");
- return ERROR_OK;
- }
-
- int wp_num = watchpoint->set - 1;
- if ((wp_num < 0) || (wp_num >= mips64->num_data_bpoints)) {
- LOG_DEBUG("Invalid FP Comparator number in watchpoint");
- return ERROR_OK;
- }
- comparator_list[wp_num].used = false;
- comparator_list[wp_num].bp_value = 0;
- target_write_u64(target, comparator_list[wp_num].reg_address + 0x18, 0);
- watchpoint->set = 0;
-
- return ERROR_OK;
- }
-
- static int mips_mips64_add_watchpoint(struct target *target,
- struct watchpoint *watchpoint)
- {
- struct mips64_common *mips64 = target->arch_info;
-
- if (mips64->num_data_bpoints_avail < 1) {
- LOG_INFO("no hardware watchpoints available");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- mips64->num_data_bpoints_avail--;
-
- return mips_mips64_set_watchpoint(target, watchpoint);
- }
-
- static int mips_mips64_remove_watchpoint(struct target *target,
- struct watchpoint *watchpoint)
- {
- /* get pointers to arch-specific information */
- struct mips64_common *mips64 = target->arch_info;
- int retval = ERROR_OK;
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (watchpoint->set)
- retval = mips_mips64_unset_watchpoint(target, watchpoint);
-
- mips64->num_data_bpoints_avail++;
-
- return retval;
- }
-
- static int mips_mips64_read_memory(struct target *target, uint64_t address,
- uint32_t size, uint32_t count, uint8_t *buffer)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- int retval;
- void *t;
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted %d", target->state);
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (mips64->mips64mode32)
- address = mips64_extend_sign(address);
-
- /* sanitize arguments */
- if (((size != 8) && (size != 4) && (size != 2) && (size != 1))
- || !count || !buffer)
- return ERROR_COMMAND_ARGUMENT_INVALID;
-
- if (((size == 8) && (address & 0x7)) || ((size == 4) && (address & 0x3))
- || ((size == 2) && (address & 0x1)))
- return ERROR_TARGET_UNALIGNED_ACCESS;
-
- if (size > 1) {
- t = calloc(count, size);
- if (!t) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
- }
- } else
- t = buffer;
-
- LOG_DEBUG("address: 0x%16.16" PRIx64 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "",
- address, size, count);
- retval = mips64_pracc_read_mem(ejtag_info, address, size, count,
- (void *)t);
-
- if (retval != ERROR_OK) {
- LOG_ERROR("mips64_pracc_read_mem filed");
- goto read_done;
- }
-
- switch (size) {
- case 8:
- target_buffer_set_u64_array(target, buffer, count, t);
- break;
- case 4:
- target_buffer_set_u32_array(target, buffer, count, t);
- break;
- case 2:
- target_buffer_set_u16_array(target, buffer, count, t);
- break;
- }
-
- read_done:
- if (size > 1)
- free(t);
-
- return retval;
- }
-
- static int mips_mips64_bulk_write_memory(struct target *target,
- target_addr_t address, uint32_t count,
- const uint8_t *buffer)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- struct working_area *fast_data_area;
- int retval;
-
- LOG_DEBUG("address: " TARGET_ADDR_FMT ", count: 0x%8.8" PRIx32 "",
- address, count);
-
- if (address & 0x7)
- return ERROR_TARGET_UNALIGNED_ACCESS;
-
- if (!mips64->fast_data_area) {
- /* Get memory for block write handler
- * we preserve this area between calls and gain a speed increase
- * of about 3kb/sec when writing flash
- * this will be released/nulled by the system when the target is resumed or reset */
- retval = target_alloc_working_area(target,
- MIPS64_FASTDATA_HANDLER_SIZE,
- &mips64->fast_data_area);
- if (retval != ERROR_OK) {
- LOG_ERROR("No working area available");
- return retval;
- }
-
- /* reset fastadata state so the algo get reloaded */
- ejtag_info->fast_access_save = -1;
- }
-
- fast_data_area = mips64->fast_data_area;
-
- if (address <= fast_data_area->address + fast_data_area->size &&
- fast_data_area->address <= address + count) {
- LOG_ERROR("fast_data (" TARGET_ADDR_FMT ") is within write area "
- "(" TARGET_ADDR_FMT "-" TARGET_ADDR_FMT ").",
- fast_data_area->address, address, address + count);
- LOG_ERROR("Change work-area-phys or load_image address!");
- return ERROR_FAIL;
- }
-
- /* mips32_pracc_fastdata_xfer requires uint32_t in host endianness, */
- /* but byte array represents target endianness */
- uint64_t *t;
-
- t = calloc(count, sizeof(uint64_t));
- if (!t) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
- }
-
- target_buffer_get_u64_array(target, buffer, count, t);
-
- retval = mips64_pracc_fastdata_xfer(ejtag_info, mips64->fast_data_area,
- true, address, count, t);
-
- if (retval != ERROR_OK)
- LOG_ERROR("Fastdata access Failed");
-
- free(t);
-
- return retval;
- }
-
- static int mips_mips64_write_memory(struct target *target, uint64_t address,
- uint32_t size, uint32_t count, const uint8_t *buffer)
- {
- struct mips64_common *mips64 = target->arch_info;
- struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
- int retval;
-
- if (target->state != TARGET_HALTED) {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (mips64->mips64mode32)
- address = mips64_extend_sign(address);
-
- /* sanitize arguments */
- if (((size != 8) && (size != 4) && (size != 2) && (size != 1))
- || !count || !buffer)
- return ERROR_COMMAND_ARGUMENT_INVALID;
-
- if (((size == 8) && (address & 0x7)) || ((size == 4) && (address & 0x3))
- || ((size == 2) && (address & 0x1)))
- return ERROR_TARGET_UNALIGNED_ACCESS;
-
-
-
- if (size == 8 && count > 8) {
- retval = mips_mips64_bulk_write_memory(target, address, count,
- buffer);
- if (retval == ERROR_OK)
- return ERROR_OK;
-
- LOG_WARNING("Falling back to non-bulk write");
- }
-
- void *t = NULL;
- if (size > 1) {
- t = calloc(count, size);
- if (!t) {
- LOG_ERROR("unable to allocate t for write buffer");
- return ERROR_FAIL;
- }
-
- switch (size) {
- case 8:
- target_buffer_get_u64_array(target, buffer, count,
- (uint64_t *)t);
- break;
- case 4:
- target_buffer_get_u32_array(target, buffer, count,
- (uint32_t *)t);
- break;
- case 2:
- target_buffer_get_u16_array(target, buffer, count,
- (uint16_t *)t);
- break;
- }
- buffer = t;
- }
-
- LOG_DEBUG("address: 0x%16.16" PRIx64 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "",
- address, size, count);
-
- retval = mips64_pracc_write_mem(ejtag_info, address, size, count,
- (void *)buffer);
- free(t);
-
- return retval;
- }
-
- static int mips_mips64_init_target(struct command_context *cmd_ctx,
- struct target *target)
- {
- return mips64_build_reg_cache(target);
- }
-
- static int mips_mips64_target_create(struct target *target, Jim_Interp *interp)
- {
- struct mips_mips64_common *mips_mips64;
- struct mips64_common *mips64;
-
- mips_mips64 = calloc(1, sizeof(*mips_mips64));
- if (!mips_mips64) {
- LOG_ERROR("unable to allocate mips_mips64");
- return ERROR_FAIL;
- }
-
- mips_mips64->common_magic = MIPS64_COMMON_MAGIC;
-
- mips64 = &mips_mips64->mips64_common;
- mips64->arch_info = mips_mips64;
- target->arch_info = mips64;
-
- return mips64_init_arch_info(target, mips64, target->tap);
- }
-
- static int mips_mips64_examine(struct target *target)
- {
- int retval;
- struct mips64_common *mips64 = target->arch_info;
-
- retval = mips_ejtag_init(&mips64->ejtag_info);
- if (retval != ERROR_OK)
- return retval;
-
- return mips64_examine(target);
- }
-
- static int mips_mips64_checksum_memory(struct target *target, uint64_t address,
- uint32_t size, uint32_t *checksum)
- {
- return ERROR_FAIL; /* use bulk read method */
- }
-
- COMMAND_HANDLER(handle_mips64mode32)
- {
- struct target *target = get_current_target(CMD_CTX);
- struct mips64_common *mips64 = target->arch_info;
-
- if (CMD_ARGC > 0)
- COMMAND_PARSE_BOOL(CMD_ARGV[0], mips64->mips64mode32, "on", "off");
-
- if (mips64->mips64mode32)
- command_print(CMD, "enabled");
- else
- command_print(CMD, "disabled");
-
- return ERROR_OK;
- }
-
-
- static const struct command_registration mips64_commands_handlers[] = {
- {
- .name = "mips64mode32",
- .mode = COMMAND_EXEC,
- .help = "Enable/disable 32 bit mode",
- .usage = "[1|0]",
- .handler = handle_mips64mode32
- },
- COMMAND_REGISTRATION_DONE
- };
-
- struct target_type mips_mips64_target = {
- .name = "mips_mips64",
-
- .poll = mips_mips64_poll,
- .arch_state = mips64_arch_state,
-
- .target_request_data = NULL,
-
- .halt = mips_mips64_halt,
- .resume = mips_mips64_resume,
- .step = mips_mips64_step,
-
- .assert_reset = mips_mips64_assert_reset,
- .deassert_reset = mips_mips64_deassert_reset,
- .soft_reset_halt = mips_mips64_soft_reset_halt,
-
- .get_gdb_reg_list = mips64_get_gdb_reg_list,
-
- .read_memory = mips_mips64_read_memory,
- .write_memory = mips_mips64_write_memory,
- .checksum_memory = mips_mips64_checksum_memory,
- .blank_check_memory = NULL,
-
- .run_algorithm = mips64_run_algorithm,
-
- .add_breakpoint = mips_mips64_add_breakpoint,
- .remove_breakpoint = mips_mips64_remove_breakpoint,
- .add_watchpoint = mips_mips64_add_watchpoint,
- .remove_watchpoint = mips_mips64_remove_watchpoint,
-
- .target_create = mips_mips64_target_create,
- .init_target = mips_mips64_init_target,
- .examine = mips_mips64_examine,
-
- .commands = mips64_commands_handlers,
- };
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