From 80f1a92bd7989bfdd8b7f00d947149b77407e15c Mon Sep 17 00:00:00 2001 From: Peter Mamonov Date: Tue, 23 Sep 2014 12:51:05 +0400 Subject: [PATCH] mips64: Add generic mips64 target support Change-Id: I2bdd2573f23e65652686d18031698f423eec77c0 Signed-off-by: Konstantin Kostyukhin Signed-off-by: Aleksey Kuleshov Signed-off-by: Peter Mamonov Signed-off-by: Oleksij Rempel CC: Dongxue Zhang CC: Paul Fertser CC: Salvador Arroyo CC: Spencer Oliver Reviewed-on: http://openocd.zylin.com/2322 Tested-by: jenkins Reviewed-by: Paul Fertser --- src/target/Makefile.am | 2 + src/target/mips_mips64.c | 1197 ++++++++++++++++++++++++++++++++++++++ src/target/mips_mips64.h | 24 + src/target/target.c | 2 + 4 files changed, 1225 insertions(+) create mode 100644 src/target/mips_mips64.c create mode 100644 src/target/mips_mips64.h diff --git a/src/target/Makefile.am b/src/target/Makefile.am index 2a7cc4b3b..08a4b961f 100644 --- a/src/target/Makefile.am +++ b/src/target/Makefile.am @@ -125,6 +125,7 @@ MIPS64_SRC = \ %D%/mips64.c \ %D%/mips32_pracc.c \ %D%/mips64_pracc.c \ + %D%/mips_mips64.c \ %D%/trace.c \ %D%/mips_ejtag.c @@ -203,6 +204,7 @@ ESIRISC_SRC = \ %D%/mips32.h \ %D%/mips64.h \ %D%/mips_m4k.h \ + %D%/mips_mips64.h \ %D%/mips_ejtag.h \ %D%/mips32_pracc.h \ %D%/mips32_dmaacc.h \ diff --git a/src/target/mips_mips64.c b/src/target/mips_mips64.c new file mode 100644 index 000000000..d91700dfe --- /dev/null +++ b/src/target/mips_mips64.c @@ -0,0 +1,1197 @@ +/* + * MIPS64 generic target support + * + * Copyright (C) 2014 by Andrey Sidorov + * Copyright (C) 2014 by Aleksey Kuleshov + * Copyright (C) 2014-2019 by Peter Mamonov + * + * 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 + +#if BUILD_TARGET64 == 1 + +#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", + *(uint64_t *)pc->value, 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: %d)", + 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: %d, 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: %d", 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: %d)", + bp->unique_id); + return ERROR_OK; + } + + LOG_DEBUG("bpid: %d - 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: %d", 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
*/ + 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 + *
*/ + 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 (ERROR_OK != retval) { + 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, +}; + +#endif /* BUILD_TARGET64 */ diff --git a/src/target/mips_mips64.h b/src/target/mips_mips64.h new file mode 100644 index 000000000..69fb2a6f9 --- /dev/null +++ b/src/target/mips_mips64.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * MIPS64 generic target support * + * + * Copyright (C) 2014 by Andrey Sidorov + * Copyright (C) 2014 by Aleksey Kuleshov + * Copyright (C) 2014-2019 by Peter Mamonov + * + * Based on the work of: + * Copyright (C) 2008 by Spencer Oliver + * Copyright (C) 2008 by David T.L. Wong + */ + +#ifndef OPENOCD_TARGET_MIPS_MIPS64_H +#define OPENOCD_TARGET_MIPS_MIPS64_H + +#include "helper/types.h" + +struct mips_mips64_common { + int common_magic; + struct mips64_common mips64_common; +}; + +#endif /* OPENOCD_TARGET_MIPS_MIPS64_H */ diff --git a/src/target/target.c b/src/target/target.c index 03b6f4eb2..2bfbd5700 100644 --- a/src/target/target.c +++ b/src/target/target.c @@ -94,6 +94,7 @@ extern struct target_type cortexr4_target; extern struct target_type arm11_target; extern struct target_type ls1_sap_target; extern struct target_type mips_m4k_target; +extern struct target_type mips_mips64_target; extern struct target_type avr_target; extern struct target_type dsp563xx_target; extern struct target_type dsp5680xx_target; @@ -147,6 +148,7 @@ static struct target_type *target_types[] = { &esirisc_target, #if BUILD_TARGET64 &aarch64_target, + &mips_mips64_target, #endif NULL, };