--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2015 by David Ung *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "breakpoints.h"
+#include "aarch64.h"
+#include "register.h"
+#include "target_request.h"
+#include "target_type.h"
+#include "arm_opcodes.h"
+#include <helper/time_support.h>
+
+static int aarch64_poll(struct target *target);
+static int aarch64_debug_entry(struct target *target);
+static int aarch64_restore_context(struct target *target, bool bpwp);
+static int aarch64_set_breakpoint(struct target *target,
+ struct breakpoint *breakpoint, uint8_t matchmode);
+static int aarch64_set_context_breakpoint(struct target *target,
+ struct breakpoint *breakpoint, uint8_t matchmode);
+static int aarch64_set_hybrid_breakpoint(struct target *target,
+ struct breakpoint *breakpoint);
+static int aarch64_unset_breakpoint(struct target *target,
+ struct breakpoint *breakpoint);
+static int aarch64_mmu(struct target *target, int *enabled);
+static int aarch64_virt2phys(struct target *target,
+ target_addr_t virt, target_addr_t *phys);
+static int aarch64_read_apb_ab_memory(struct target *target,
+ uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t data);
+
+static int aarch64_restore_system_control_reg(struct target *target)
+{
+ int retval = ERROR_OK;
+
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ if (aarch64->system_control_reg != aarch64->system_control_reg_curr) {
+ aarch64->system_control_reg_curr = aarch64->system_control_reg;
+ retval = aarch64_instr_write_data_r0(armv8->arm.dpm,
+ 0xd5181000,
+ aarch64->system_control_reg);
+ }
+
+ return retval;
+}
+
+/* check address before aarch64_apb read write access with mmu on
+ * remove apb predictible data abort */
+static int aarch64_check_address(struct target *target, uint32_t address)
+{
+ /* TODO */
+ return ERROR_OK;
+}
+/* modify system_control_reg in order to enable or disable mmu for :
+ * - virt2phys address conversion
+ * - read or write memory in phys or virt address */
+static int aarch64_mmu_modify(struct target *target, int enable)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ int retval = ERROR_OK;
+
+ if (enable) {
+ /* if mmu enabled at target stop and mmu not enable */
+ if (!(aarch64->system_control_reg & 0x1U)) {
+ LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
+ return ERROR_FAIL;
+ }
+ if (!(aarch64->system_control_reg_curr & 0x1U)) {
+ aarch64->system_control_reg_curr |= 0x1U;
+ retval = aarch64_instr_write_data_r0(armv8->arm.dpm,
+ 0xd5181000,
+ aarch64->system_control_reg_curr);
+ }
+ } else {
+ if (aarch64->system_control_reg_curr & 0x4U) {
+ /* data cache is active */
+ aarch64->system_control_reg_curr &= ~0x4U;
+ /* flush data cache armv7 function to be called */
+ if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache)
+ armv8->armv8_mmu.armv8_cache.flush_all_data_cache(target);
+ }
+ if ((aarch64->system_control_reg_curr & 0x1U)) {
+ aarch64->system_control_reg_curr &= ~0x1U;
+ retval = aarch64_instr_write_data_r0(armv8->arm.dpm,
+ 0xd5181000,
+ aarch64->system_control_reg_curr);
+ }
+ }
+ return retval;
+}
+
+/*
+ * Basic debug access, very low level assumes state is saved
+ */
+static int aarch64_init_debug_access(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ int retval;
+ uint32_t dummy;
+
+ LOG_DEBUG(" ");
+
+ /* Unlocking the debug registers for modification
+ * The debugport might be uninitialised so try twice */
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ if (retval != ERROR_OK) {
+ /* try again */
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ if (retval == ERROR_OK)
+ LOG_USER("Locking debug access failed on first, but succeeded on second try.");
+ }
+ if (retval != ERROR_OK)
+ return retval;
+ /* Clear Sticky Power Down status Bit in PRSR to enable access to
+ the registers in the Core Power Domain */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_PRSR, &dummy);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Enabling of instruction execution in debug mode is done in debug_entry code */
+
+ /* Resync breakpoint registers */
+
+ /* Since this is likely called from init or reset, update target state information*/
+ return aarch64_poll(target);
+}
+
+/* To reduce needless round-trips, pass in a pointer to the current
+ * DSCR value. Initialize it to zero if you just need to know the
+ * value on return from this function; or DSCR_INSTR_COMP if you
+ * happen to know that no instruction is pending.
+ */
+static int aarch64_exec_opcode(struct target *target,
+ uint32_t opcode, uint32_t *dscr_p)
+{
+ uint32_t dscr;
+ int retval;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ dscr = dscr_p ? *dscr_p : 0;
+
+ LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
+
+ /* Wait for InstrCompl bit to be set */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_INSTR_COMP) == 0) {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
+ return retval;
+ }
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
+ return ERROR_FAIL;
+ }
+ }
+
+ retval = mem_ap_write_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_ITR, opcode);
+ if (retval != ERROR_OK)
+ return retval;
+
+ then = timeval_ms();
+ do {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Could not read DSCR register");
+ return retval;
+ }
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
+ return ERROR_FAIL;
+ }
+ } while ((dscr & DSCR_INSTR_COMP) == 0); /* Wait for InstrCompl bit to be set */
+
+ if (dscr_p)
+ *dscr_p = dscr;
+
+ return retval;
+}
+
+/* Write to memory mapped registers directly with no cache or mmu handling */
+static int aarch64_dap_write_memap_register_u32(struct target *target,
+ uint32_t address,
+ uint32_t value)
+{
+ int retval;
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap, address, value);
+
+ return retval;
+}
+
+/*
+ * AARCH64 implementation of Debug Programmer's Model
+ *
+ * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
+ * so there's no need to poll for it before executing an instruction.
+ *
+ * NOTE that in several of these cases the "stall" mode might be useful.
+ * It'd let us queue a few operations together... prepare/finish might
+ * be the places to enable/disable that mode.
+ */
+
+static inline struct aarch64_common *dpm_to_a8(struct arm_dpm *dpm)
+{
+ return container_of(dpm, struct aarch64_common, armv8_common.dpm);
+}
+
+static int aarch64_write_dcc(struct aarch64_common *a8, uint32_t data)
+{
+ LOG_DEBUG("write DCC 0x%08" PRIx32, data);
+ return mem_ap_write_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRRX, data);
+}
+
+static int aarch64_write_dcc_64(struct aarch64_common *a8, uint64_t data)
+{
+ int ret;
+ LOG_DEBUG("write DCC 0x%08" PRIx32, (unsigned)data);
+ LOG_DEBUG("write DCC 0x%08" PRIx32, (unsigned)(data >> 32));
+ ret = mem_ap_write_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRRX, data);
+ ret += mem_ap_write_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRTX, data >> 32);
+ return ret;
+}
+
+static int aarch64_read_dcc(struct aarch64_common *a8, uint32_t *data,
+ uint32_t *dscr_p)
+{
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ if (dscr_p)
+ dscr = *dscr_p;
+
+ /* Wait for DTRRXfull */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_DTR_TX_FULL) == 0) {
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DSCR,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for read dcc");
+ return ERROR_FAIL;
+ }
+ }
+
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRTX,
+ data);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
+
+ if (dscr_p)
+ *dscr_p = dscr;
+
+ return retval;
+}
+static int aarch64_read_dcc_64(struct aarch64_common *a8, uint64_t *data,
+ uint32_t *dscr_p)
+{
+ uint32_t dscr = DSCR_INSTR_COMP;
+ uint32_t higher;
+ int retval;
+
+ if (dscr_p)
+ dscr = *dscr_p;
+
+ /* Wait for DTRRXfull */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_DTR_TX_FULL) == 0) {
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DSCR,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for read dcc");
+ return ERROR_FAIL;
+ }
+ }
+
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRTX,
+ (uint32_t *)data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DTRRX,
+ &higher);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = *(uint32_t *)data | (uint64_t)higher << 32;
+ LOG_DEBUG("read DCC 0x%16.16" PRIx64, *data);
+
+ if (dscr_p)
+ *dscr_p = dscr;
+
+ return retval;
+}
+
+static int aarch64_dpm_prepare(struct arm_dpm *dpm)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr;
+ int retval;
+
+ /* set up invariant: INSTR_COMP is set after ever DPM operation */
+ long long then = timeval_ms();
+ for (;; ) {
+ retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
+ a8->armv8_common.debug_base + CPUDBG_DSCR,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_INSTR_COMP) != 0)
+ break;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for dpm prepare");
+ return ERROR_FAIL;
+ }
+ }
+
+ /* this "should never happen" ... */
+ if (dscr & DSCR_DTR_RX_FULL) {
+ LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
+ /* Clear DCCRX */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ 0xd5130400,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ return retval;
+}
+
+static int aarch64_dpm_finish(struct arm_dpm *dpm)
+{
+ /* REVISIT what could be done here? */
+ return ERROR_OK;
+}
+
+static int aarch64_instr_write_data_dcc(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ retval = aarch64_write_dcc(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+}
+
+static int aarch64_instr_write_data_dcc_64(struct arm_dpm *dpm,
+ uint32_t opcode, uint64_t data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ retval = aarch64_write_dcc_64(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+}
+
+static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ retval = aarch64_write_dcc(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ 0xd5330500,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* then the opcode, taking data from R0 */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+
+ return retval;
+}
+
+static int aarch64_instr_write_data_r0_64(struct arm_dpm *dpm,
+ uint32_t opcode, uint64_t data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ retval = aarch64_write_dcc_64(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ 0xd5330400,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* then the opcode, taking data from R0 */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+
+ return retval;
+}
+
+static int aarch64_instr_cpsr_sync(struct arm_dpm *dpm)
+{
+ struct target *target = dpm->arm->target;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ /* "Prefetch flush" after modifying execution status in CPSR */
+ return aarch64_exec_opcode(target,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
+ &dscr);
+}
+
+static int aarch64_instr_read_data_dcc(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t *data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ /* the opcode, writing data to DCC */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_read_dcc(a8, data, &dscr);
+}
+
+static int aarch64_instr_read_data_dcc_64(struct arm_dpm *dpm,
+ uint32_t opcode, uint64_t *data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ /* the opcode, writing data to DCC */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_read_dcc_64(a8, data, &dscr);
+}
+
+static int aarch64_instr_read_data_r0(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t *data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ /* the opcode, writing data to R0 */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* write R0 to DCC */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ 0xd5130400, /* msr dbgdtr_el0, x0 */
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_read_dcc(a8, data, &dscr);
+}
+
+static int aarch64_instr_read_data_r0_64(struct arm_dpm *dpm,
+ uint32_t opcode, uint64_t *data)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ /* the opcode, writing data to R0 */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* write R0 to DCC */
+ retval = aarch64_exec_opcode(
+ a8->armv8_common.arm.target,
+ 0xd5130400, /* msr dbgdtr_el0, x0 */
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return aarch64_read_dcc_64(a8, data, &dscr);
+}
+
+static int aarch64_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
+ uint32_t addr, uint32_t control)
+{
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t vr = a8->armv8_common.debug_base;
+ uint32_t cr = a8->armv8_common.debug_base;
+ int retval;
+
+ switch (index_t) {
+ case 0 ... 15: /* breakpoints */
+ vr += CPUDBG_BVR_BASE;
+ cr += CPUDBG_BCR_BASE;
+ break;
+ case 16 ... 31: /* watchpoints */
+ vr += CPUDBG_WVR_BASE;
+ cr += CPUDBG_WCR_BASE;
+ index_t -= 16;
+ break;
+ default:
+ return ERROR_FAIL;
+ }
+ vr += 4 * index_t;
+ cr += 4 * index_t;
+
+ LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
+ (unsigned) vr, (unsigned) cr);
+
+ retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
+ vr, addr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
+ cr, control);
+ return retval;
+}
+
+static int aarch64_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
+{
+ return ERROR_OK;
+
+#if 0
+ struct aarch64_common *a8 = dpm_to_a8(dpm);
+ uint32_t cr;
+
+ switch (index_t) {
+ case 0 ... 15:
+ cr = a8->armv8_common.debug_base + CPUDBG_BCR_BASE;
+ break;
+ case 16 ... 31:
+ cr = a8->armv8_common.debug_base + CPUDBG_WCR_BASE;
+ index_t -= 16;
+ break;
+ default:
+ return ERROR_FAIL;
+ }
+ cr += 4 * index_t;
+
+ LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr);
+
+ /* clear control register */
+ return aarch64_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
+#endif
+}
+
+static int aarch64_dpm_setup(struct aarch64_common *a8, uint32_t debug)
+{
+ struct arm_dpm *dpm = &a8->armv8_common.dpm;
+ int retval;
+
+ dpm->arm = &a8->armv8_common.arm;
+ dpm->didr = debug;
+
+ dpm->prepare = aarch64_dpm_prepare;
+ dpm->finish = aarch64_dpm_finish;
+
+ dpm->instr_write_data_dcc = aarch64_instr_write_data_dcc;
+ dpm->instr_write_data_dcc_64 = aarch64_instr_write_data_dcc_64;
+ dpm->instr_write_data_r0 = aarch64_instr_write_data_r0;
+ dpm->instr_write_data_r0_64 = aarch64_instr_write_data_r0_64;
+ dpm->instr_cpsr_sync = aarch64_instr_cpsr_sync;
+
+ dpm->instr_read_data_dcc = aarch64_instr_read_data_dcc;
+ dpm->instr_read_data_dcc_64 = aarch64_instr_read_data_dcc_64;
+ dpm->instr_read_data_r0 = aarch64_instr_read_data_r0;
+ dpm->instr_read_data_r0_64 = aarch64_instr_read_data_r0_64;
+
+ dpm->arm_reg_current = armv8_reg_current;
+
+ dpm->bpwp_enable = aarch64_bpwp_enable;
+ dpm->bpwp_disable = aarch64_bpwp_disable;
+
+ retval = arm_dpm_setup(dpm);
+ if (retval == ERROR_OK)
+ retval = arm_dpm_initialize(dpm);
+
+ return retval;
+}
+static struct target *get_aarch64(struct target *target, int32_t coreid)
+{
+ struct target_list *head;
+ struct target *curr;
+
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if ((curr->coreid == coreid) && (curr->state == TARGET_HALTED))
+ return curr;
+ head = head->next;
+ }
+ return target;
+}
+static int aarch64_halt(struct target *target);
+
+static int aarch64_halt_smp(struct target *target)
+{
+ int retval = 0;
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if ((curr != target) && (curr->state != TARGET_HALTED))
+ retval += aarch64_halt(curr);
+ head = head->next;
+ }
+ return retval;
+}
+
+static int update_halt_gdb(struct target *target)
+{
+ int retval = 0;
+ if (target->gdb_service && target->gdb_service->core[0] == -1) {
+ target->gdb_service->target = target;
+ target->gdb_service->core[0] = target->coreid;
+ retval += aarch64_halt_smp(target);
+ }
+ return retval;
+}
+
+/*
+ * Cortex-A8 Run control
+ */
+
+static int aarch64_poll(struct target *target)
+{
+ int retval = ERROR_OK;
+ uint32_t dscr;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ enum target_state prev_target_state = target->state;
+ /* toggle to another core is done by gdb as follow */
+ /* maint packet J core_id */
+ /* continue */
+ /* the next polling trigger an halt event sent to gdb */
+ if ((target->state == TARGET_HALTED) && (target->smp) &&
+ (target->gdb_service) &&
+ (target->gdb_service->target == NULL)) {
+ target->gdb_service->target =
+ get_aarch64(target, target->gdb_service->core[1]);
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ return retval;
+ }
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ aarch64->cpudbg_dscr = dscr;
+
+ if (DSCR_RUN_MODE(dscr) == (DSCR_CORE_HALTED | DSCR_CORE_RESTARTED)) {
+ if (prev_target_state != TARGET_HALTED) {
+ /* We have a halting debug event */
+ LOG_DEBUG("Target halted");
+ target->state = TARGET_HALTED;
+ if ((prev_target_state == TARGET_RUNNING)
+ || (prev_target_state == TARGET_UNKNOWN)
+ || (prev_target_state == TARGET_RESET)) {
+ retval = aarch64_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+ if (target->smp) {
+ retval = update_halt_gdb(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ target_call_event_callbacks(target,
+ TARGET_EVENT_HALTED);
+ }
+ if (prev_target_state == TARGET_DEBUG_RUNNING) {
+ LOG_DEBUG(" ");
+
+ retval = aarch64_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+ if (target->smp) {
+ retval = update_halt_gdb(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ target_call_event_callbacks(target,
+ TARGET_EVENT_DEBUG_HALTED);
+ }
+ }
+ } else if (DSCR_RUN_MODE(dscr) == DSCR_CORE_RESTARTED)
+ target->state = TARGET_RUNNING;
+ else {
+ LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32, dscr);
+ target->state = TARGET_UNKNOWN;
+ }
+
+ return retval;
+}
+
+static int aarch64_halt(struct target *target)
+{
+ int retval = ERROR_OK;
+ uint32_t dscr;
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0, 1);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0, &dscr);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x140, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x140, 6);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x140, &dscr);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa0, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa0, 5);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa0, &dscr);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa4, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa4, 2);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0xa4, &dscr);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x20, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x20, 4);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x20, &dscr);
+
+ /*
+ * enter halting debug mode
+ */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+# /* STATUS */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x134, &dscr);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x1c, &dscr);
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x1c, 1);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x1c, &dscr);
+
+
+ long long then = timeval_ms();
+ for (;; ) {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_CORE_HALTED) != 0)
+ break;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for halt");
+ return ERROR_FAIL;
+ }
+ }
+
+ target->debug_reason = DBG_REASON_DBGRQ;
+
+ return ERROR_OK;
+}
+
+static int aarch64_internal_restore(struct target *target, int current,
+ uint64_t *address, int handle_breakpoints, int debug_execution)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ int retval;
+ uint64_t resume_pc;
+
+ if (!debug_execution)
+ target_free_all_working_areas(target);
+
+ /* current = 1: continue on current pc, otherwise continue at <address> */
+ resume_pc = buf_get_u64(arm->pc->value, 0, 64);
+ if (!current)
+ resume_pc = *address;
+ else
+ *address = resume_pc;
+
+ /* Make sure that the Armv7 gdb thumb fixups does not
+ * kill the return address
+ */
+ switch (arm->core_state) {
+ case ARM_STATE_ARM:
+ case ARM_STATE_AARCH64:
+ resume_pc &= 0xFFFFFFFFFFFFFFFC;
+ break;
+ case ARM_STATE_THUMB:
+ case ARM_STATE_THUMB_EE:
+ /* When the return address is loaded into PC
+ * bit 0 must be 1 to stay in Thumb state
+ */
+ resume_pc |= 0x1;
+ break;
+ case ARM_STATE_JAZELLE:
+ LOG_ERROR("How do I resume into Jazelle state??");
+ return ERROR_FAIL;
+ }
+ LOG_DEBUG("resume pc = 0x%16" PRIx64, resume_pc);
+ buf_set_u64(arm->pc->value, 0, 64, resume_pc);
+ arm->pc->dirty = 1;
+ arm->pc->valid = 1;
+#if 0
+ /* restore dpm_mode at system halt */
+ dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
+#endif
+ /* called it now before restoring context because it uses cpu
+ * register r0 for restoring system control register */
+ retval = aarch64_restore_system_control_reg(target);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_restore_context(target, handle_breakpoints);
+ if (retval != ERROR_OK)
+ return retval;
+ target->debug_reason = DBG_REASON_NOTHALTED;
+ target->state = TARGET_RUNNING;
+
+ /* registers are now invalid */
+ register_cache_invalidate(arm->core_cache);
+
+#if 0
+ /* the front-end may request us not to handle breakpoints */
+ if (handle_breakpoints) {
+ /* Single step past breakpoint at current address */
+ breakpoint = breakpoint_find(target, resume_pc);
+ if (breakpoint) {
+ LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
+ cortex_m3_unset_breakpoint(target, breakpoint);
+ cortex_m3_single_step_core(target);
+ cortex_m3_set_breakpoint(target, breakpoint);
+ }
+ }
+#endif
+
+ return retval;
+}
+
+static int aarch64_internal_restart(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ int retval;
+ uint32_t dscr;
+ /*
+ * * Restart core and wait for it to be started. Clear ITRen and sticky
+ * * exception flags: see ARMv7 ARM, C5.9.
+ *
+ * REVISIT: for single stepping, we probably want to
+ * disable IRQs by default, with optional override...
+ */
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((dscr & DSCR_INSTR_COMP) == 0)
+ LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, dscr & ~DSCR_ITR_EN);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, DRCR_RESTART |
+ DRCR_CLEAR_EXCEPTIONS);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x10, 1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x10000 + 0x1c, 2);
+ if (retval != ERROR_OK)
+ return retval;
+
+ long long then = timeval_ms();
+ for (;; ) {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_CORE_RESTARTED) != 0)
+ break;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("Timeout waiting for resume");
+ return ERROR_FAIL;
+ }
+ }
+
+ target->debug_reason = DBG_REASON_NOTHALTED;
+ target->state = TARGET_RUNNING;
+
+ /* registers are now invalid */
+ register_cache_invalidate(arm->core_cache);
+
+ return ERROR_OK;
+}
+
+static int aarch64_restore_smp(struct target *target, int handle_breakpoints)
+{
+ int retval = 0;
+ struct target_list *head;
+ struct target *curr;
+ uint64_t address;
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if ((curr != target) && (curr->state != TARGET_RUNNING)) {
+ /* resume current address , not in step mode */
+ retval += aarch64_internal_restore(curr, 1, &address,
+ handle_breakpoints, 0);
+ retval += aarch64_internal_restart(curr);
+ }
+ head = head->next;
+
+ }
+ return retval;
+}
+
+static int aarch64_resume(struct target *target, int current,
+ target_addr_t address, int handle_breakpoints, int debug_execution)
+{
+ int retval = 0;
+ uint64_t resume_addr;
+
+ if (address) {
+ LOG_DEBUG("resuming with custom address not supported");
+ return ERROR_FAIL;
+ }
+
+ /* dummy resume for smp toggle in order to reduce gdb impact */
+ if ((target->smp) && (target->gdb_service->core[1] != -1)) {
+ /* simulate a start and halt of target */
+ target->gdb_service->target = NULL;
+ target->gdb_service->core[0] = target->gdb_service->core[1];
+ /* fake resume at next poll we play the target core[1], see poll*/
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ return 0;
+ }
+ aarch64_internal_restore(target, current, &resume_addr, handle_breakpoints, debug_execution);
+ if (target->smp) {
+ target->gdb_service->core[0] = -1;
+ retval = aarch64_restore_smp(target, handle_breakpoints);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ aarch64_internal_restart(target);
+
+ if (!debug_execution) {
+ target->state = TARGET_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ LOG_DEBUG("target resumed at 0x%" PRIx64, resume_addr);
+ } else {
+ target->state = TARGET_DEBUG_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
+ LOG_DEBUG("target debug resumed at 0x%" PRIx64, resume_addr);
+ }
+
+ return ERROR_OK;
+}
+
+static int aarch64_debug_entry(struct target *target)
+{
+ uint32_t dscr;
+ int retval = ERROR_OK;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ LOG_DEBUG("dscr = 0x%08" PRIx32, aarch64->cpudbg_dscr);
+
+ /* REVISIT surely we should not re-read DSCR !! */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
+ * imprecise data aborts get discarded by issuing a Data
+ * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
+ */
+
+ /* Enable the ITR execution once we are in debug mode */
+ dscr |= DSCR_ITR_EN;
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Examine debug reason */
+ arm_dpm_report_dscr(&armv8->dpm, aarch64->cpudbg_dscr);
+
+ /* save address of instruction that triggered the watchpoint? */
+ if (target->debug_reason == DBG_REASON_WATCHPOINT) {
+ uint32_t wfar;
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_WFAR,
+ &wfar);
+ if (retval != ERROR_OK)
+ return retval;
+ arm_dpm_report_wfar(&armv8->dpm, wfar);
+ }
+
+ retval = arm_dpm_read_current_registers_64(&armv8->dpm);
+
+ if (armv8->post_debug_entry) {
+ retval = armv8->post_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ return retval;
+}
+
+static int aarch64_post_debug_entry(struct target *target)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct armv8_mmu_common *armv8_mmu = &armv8->armv8_mmu;
+ uint32_t sctlr_el1 = 0;
+ int retval;
+
+ mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, 1<<2);
+ retval = aarch64_instr_read_data_r0(armv8->arm.dpm,
+ 0xd5381000, &sctlr_el1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_DEBUG("sctlr_el1 = %#8.8x", sctlr_el1);
+ aarch64->system_control_reg = sctlr_el1;
+ aarch64->system_control_reg_curr = sctlr_el1;
+ aarch64->curr_mode = armv8->arm.core_mode;
+
+ armv8_mmu->mmu_enabled = sctlr_el1 & 0x1U ? 1 : 0;
+ armv8_mmu->armv8_cache.d_u_cache_enabled = sctlr_el1 & 0x4U ? 1 : 0;
+ armv8_mmu->armv8_cache.i_cache_enabled = sctlr_el1 & 0x1000U ? 1 : 0;
+
+#if 0
+ if (armv8->armv8_mmu.armv8_cache.ctype == -1)
+ armv8_identify_cache(target);
+#endif
+
+ return ERROR_OK;
+}
+
+static int aarch64_step(struct target *target, int current, target_addr_t address,
+ int handle_breakpoints)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ struct breakpoint *breakpoint = NULL;
+ struct breakpoint stepbreakpoint;
+ struct reg *r;
+ int retval;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* current = 1: continue on current pc, otherwise continue at <address> */
+ r = arm->pc;
+ if (!current)
+ buf_set_u64(r->value, 0, 64, address);
+ else
+ address = buf_get_u64(r->value, 0, 64);
+
+ /* The front-end may request us not to handle breakpoints.
+ * But since Cortex-A8 uses breakpoint for single step,
+ * we MUST handle breakpoints.
+ */
+ handle_breakpoints = 1;
+ if (handle_breakpoints) {
+ breakpoint = breakpoint_find(target, address);
+ if (breakpoint)
+ aarch64_unset_breakpoint(target, breakpoint);
+ }
+
+ /* Setup single step breakpoint */
+ stepbreakpoint.address = address;
+ stepbreakpoint.length = 4;
+ stepbreakpoint.type = BKPT_HARD;
+ stepbreakpoint.set = 0;
+
+ /* Break on IVA mismatch */
+ aarch64_set_breakpoint(target, &stepbreakpoint, 0x04);
+
+ target->debug_reason = DBG_REASON_SINGLESTEP;
+
+ retval = aarch64_resume(target, 1, address, 0, 0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ long long then = timeval_ms();
+ while (target->state != TARGET_HALTED) {
+ retval = aarch64_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("timeout waiting for target halt");
+ return ERROR_FAIL;
+ }
+ }
+
+ aarch64_unset_breakpoint(target, &stepbreakpoint);
+
+ target->debug_reason = DBG_REASON_BREAKPOINT;
+
+ if (breakpoint)
+ aarch64_set_breakpoint(target, breakpoint, 0);
+
+ if (target->state != TARGET_HALTED)
+ LOG_DEBUG("target stepped");
+
+ return ERROR_OK;
+}
+
+static int aarch64_restore_context(struct target *target, bool bpwp)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ LOG_DEBUG(" ");
+
+ if (armv8->pre_restore_context)
+ armv8->pre_restore_context(target);
+
+ return arm_dpm_write_dirty_registers(&armv8->dpm, bpwp);
+
+ return ERROR_OK;
+}
+
+/*
+ * Cortex-A8 Breakpoint and watchpoint functions
+ */
+
+/* Setup hardware Breakpoint Register Pair */
+static int aarch64_set_breakpoint(struct target *target,
+ struct breakpoint *breakpoint, uint8_t matchmode)
+{
+ int retval;
+ int brp_i = 0;
+ uint32_t control;
+ uint8_t byte_addr_select = 0x0F;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct aarch64_brp *brp_list = aarch64->brp_list;
+
+ if (breakpoint->set) {
+ LOG_WARNING("breakpoint already set");
+ return ERROR_OK;
+ }
+
+ if (breakpoint->type == BKPT_HARD) {
+ while (brp_list[brp_i].used && (brp_i < aarch64->brp_num))
+ brp_i++;
+ if (brp_i >= aarch64->brp_num) {
+ LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+ breakpoint->set = brp_i + 1;
+ if (breakpoint->length == 2)
+ byte_addr_select = (3 << (breakpoint->address & 0x02));
+ control = ((matchmode & 0x7) << 20)
+ | (byte_addr_select << 5)
+ | (3 << 1) | 1;
+ brp_list[brp_i].used = 1;
+ brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
+ brp_list[brp_i].control = control;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].value);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].control);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
+ brp_list[brp_i].control,
+ brp_list[brp_i].value);
+ } else if (breakpoint->type == BKPT_SOFT) {
+ uint8_t code[4];
+ if (breakpoint->length == 2)
+ buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11));
+ else
+ buf_set_u32(code, 0, 32, ARMV5_BKPT(0x11));
+ retval = target_read_memory(target,
+ breakpoint->address & 0xFFFFFFFE,
+ breakpoint->length, 1,
+ breakpoint->orig_instr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_memory(target,
+ breakpoint->address & 0xFFFFFFFE,
+ breakpoint->length, 1, code);
+ if (retval != ERROR_OK)
+ return retval;
+ breakpoint->set = 0x11; /* Any nice value but 0 */
+ }
+
+ return ERROR_OK;
+}
+
+static int aarch64_set_context_breakpoint(struct target *target,
+ struct breakpoint *breakpoint, uint8_t matchmode)
+{
+ int retval = ERROR_FAIL;
+ int brp_i = 0;
+ uint32_t control;
+ uint8_t byte_addr_select = 0x0F;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct aarch64_brp *brp_list = aarch64->brp_list;
+
+ if (breakpoint->set) {
+ LOG_WARNING("breakpoint already set");
+ return retval;
+ }
+ /*check available context BRPs*/
+ while ((brp_list[brp_i].used ||
+ (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < aarch64->brp_num))
+ brp_i++;
+
+ if (brp_i >= aarch64->brp_num) {
+ LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
+ return ERROR_FAIL;
+ }
+
+ breakpoint->set = brp_i + 1;
+ control = ((matchmode & 0x7) << 20)
+ | (byte_addr_select << 5)
+ | (3 << 1) | 1;
+ brp_list[brp_i].used = 1;
+ brp_list[brp_i].value = (breakpoint->asid);
+ brp_list[brp_i].control = control;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].value);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].control);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
+ brp_list[brp_i].control,
+ brp_list[brp_i].value);
+ return ERROR_OK;
+
+}
+
+static int aarch64_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
+{
+ int retval = ERROR_FAIL;
+ int brp_1 = 0; /* holds the contextID pair */
+ int brp_2 = 0; /* holds the IVA pair */
+ uint32_t control_CTX, control_IVA;
+ uint8_t CTX_byte_addr_select = 0x0F;
+ uint8_t IVA_byte_addr_select = 0x0F;
+ uint8_t CTX_machmode = 0x03;
+ uint8_t IVA_machmode = 0x01;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct aarch64_brp *brp_list = aarch64->brp_list;
+
+ if (breakpoint->set) {
+ LOG_WARNING("breakpoint already set");
+ return retval;
+ }
+ /*check available context BRPs*/
+ while ((brp_list[brp_1].used ||
+ (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < aarch64->brp_num))
+ brp_1++;
+
+ printf("brp(CTX) found num: %d\n", brp_1);
+ if (brp_1 >= aarch64->brp_num) {
+ LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
+ return ERROR_FAIL;
+ }
+
+ while ((brp_list[brp_2].used ||
+ (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < aarch64->brp_num))
+ brp_2++;
+
+ printf("brp(IVA) found num: %d\n", brp_2);
+ if (brp_2 >= aarch64->brp_num) {
+ LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
+ return ERROR_FAIL;
+ }
+
+ breakpoint->set = brp_1 + 1;
+ breakpoint->linked_BRP = brp_2;
+ control_CTX = ((CTX_machmode & 0x7) << 20)
+ | (brp_2 << 16)
+ | (0 << 14)
+ | (CTX_byte_addr_select << 5)
+ | (3 << 1) | 1;
+ brp_list[brp_1].used = 1;
+ brp_list[brp_1].value = (breakpoint->asid);
+ brp_list[brp_1].control = control_CTX;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 4 * brp_list[brp_1].BRPn,
+ brp_list[brp_1].value);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 4 * brp_list[brp_1].BRPn,
+ brp_list[brp_1].control);
+ if (retval != ERROR_OK)
+ return retval;
+
+ control_IVA = ((IVA_machmode & 0x7) << 20)
+ | (brp_1 << 16)
+ | (IVA_byte_addr_select << 5)
+ | (3 << 1) | 1;
+ brp_list[brp_2].used = 1;
+ brp_list[brp_2].value = (breakpoint->address & 0xFFFFFFFC);
+ brp_list[brp_2].control = control_IVA;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 4 * brp_list[brp_2].BRPn,
+ brp_list[brp_2].value);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 4 * brp_list[brp_2].BRPn,
+ brp_list[brp_2].control);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int aarch64_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
+{
+ int retval;
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct aarch64_brp *brp_list = aarch64->brp_list;
+
+ if (!breakpoint->set) {
+ LOG_WARNING("breakpoint not set");
+ return ERROR_OK;
+ }
+
+ if (breakpoint->type == BKPT_HARD) {
+ if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
+ int brp_i = breakpoint->set - 1;
+ int brp_j = breakpoint->linked_BRP;
+ if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
+ LOG_DEBUG("Invalid BRP number in breakpoint");
+ return ERROR_OK;
+ }
+ LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
+ brp_list[brp_i].control, brp_list[brp_i].value);
+ brp_list[brp_i].used = 0;
+ brp_list[brp_i].value = 0;
+ brp_list[brp_i].control = 0;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].control);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].value);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((brp_j < 0) || (brp_j >= aarch64->brp_num)) {
+ LOG_DEBUG("Invalid BRP number in breakpoint");
+ return ERROR_OK;
+ }
+ LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_j,
+ brp_list[brp_j].control, brp_list[brp_j].value);
+ brp_list[brp_j].used = 0;
+ brp_list[brp_j].value = 0;
+ brp_list[brp_j].control = 0;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 16 * brp_list[brp_j].BRPn,
+ brp_list[brp_j].control);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 16 * brp_list[brp_j].BRPn,
+ brp_list[brp_j].value);
+ if (retval != ERROR_OK)
+ return retval;
+ breakpoint->linked_BRP = 0;
+ breakpoint->set = 0;
+ return ERROR_OK;
+
+ } else {
+ int brp_i = breakpoint->set - 1;
+ if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
+ LOG_DEBUG("Invalid BRP number in breakpoint");
+ return ERROR_OK;
+ }
+ LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_i,
+ brp_list[brp_i].control, brp_list[brp_i].value);
+ brp_list[brp_i].used = 0;
+ brp_list[brp_i].value = 0;
+ brp_list[brp_i].control = 0;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].control);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
+ + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
+ brp_list[brp_i].value);
+ if (retval != ERROR_OK)
+ return retval;
+ breakpoint->set = 0;
+ return ERROR_OK;
+ }
+ } else {
+ /* restore original instruction (kept in target endianness) */
+ if (breakpoint->length == 4) {
+ retval = target_write_memory(target,
+ breakpoint->address & 0xFFFFFFFFFFFFFFFE,
+ 4, 1, breakpoint->orig_instr);
+ if (retval != ERROR_OK)
+ return retval;
+ } else {
+ retval = target_write_memory(target,
+ breakpoint->address & 0xFFFFFFFFFFFFFFFE,
+ 2, 1, breakpoint->orig_instr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+ breakpoint->set = 0;
+
+ return ERROR_OK;
+}
+
+static int aarch64_add_breakpoint(struct target *target,
+ struct breakpoint *breakpoint)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+
+ if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
+ LOG_INFO("no hardware breakpoint available");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ aarch64->brp_num_available--;
+
+ return aarch64_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
+}
+
+static int aarch64_add_context_breakpoint(struct target *target,
+ struct breakpoint *breakpoint)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+
+ if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
+ LOG_INFO("no hardware breakpoint available");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ aarch64->brp_num_available--;
+
+ return aarch64_set_context_breakpoint(target, breakpoint, 0x02); /* asid match */
+}
+
+static int aarch64_add_hybrid_breakpoint(struct target *target,
+ struct breakpoint *breakpoint)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+
+ if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
+ LOG_INFO("no hardware breakpoint available");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ aarch64->brp_num_available--;
+
+ return aarch64_set_hybrid_breakpoint(target, breakpoint); /* ??? */
+}
+
+
+static int aarch64_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+
+#if 0
+/* It is perfectly possible to remove breakpoints while the target is running */
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+#endif
+
+ if (breakpoint->set) {
+ aarch64_unset_breakpoint(target, breakpoint);
+ if (breakpoint->type == BKPT_HARD)
+ aarch64->brp_num_available++;
+ }
+
+ return ERROR_OK;
+}
+
+/*
+ * Cortex-A8 Reset functions
+ */
+
+static int aarch64_assert_reset(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ LOG_DEBUG(" ");
+
+ /* FIXME when halt is requested, make it work somehow... */
+
+ /* Issue some kind of warm reset. */
+ if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
+ target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
+ else if (jtag_get_reset_config() & RESET_HAS_SRST) {
+ /* REVISIT handle "pulls" cases, if there's
+ * hardware that needs them to work.
+ */
+ jtag_add_reset(0, 1);
+ } else {
+ LOG_ERROR("%s: how to reset?", target_name(target));
+ return ERROR_FAIL;
+ }
+
+ /* registers are now invalid */
+ register_cache_invalidate(armv8->arm.core_cache);
+
+ target->state = TARGET_RESET;
+
+ return ERROR_OK;
+}
+
+static int aarch64_deassert_reset(struct target *target)
+{
+ int retval;
+
+ LOG_DEBUG(" ");
+
+ /* be certain SRST is off */
+ jtag_add_reset(0, 0);
+
+ retval = aarch64_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (target->reset_halt) {
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("%s: ran after reset and before halt ...",
+ target_name(target));
+ retval = target_halt(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int aarch64_write_apb_ab_memory(struct target *target,
+ uint64_t address, uint32_t size,
+ uint32_t count, const uint8_t *buffer)
+{
+ /* write memory through APB-AP */
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ int total_bytes = count * size;
+ int total_u32;
+ int start_byte = address & 0x3;
+ int end_byte = (address + total_bytes) & 0x3;
+ struct reg *reg;
+ uint32_t dscr;
+ uint8_t *tmp_buff = NULL;
+ uint32_t i = 0;
+
+ LOG_DEBUG("Writing APB-AP memory address 0x%" PRIx64 " size %" PRIu32 " count%" PRIu32,
+ address, size, count);
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ total_u32 = DIV_ROUND_UP((address & 3) + total_bytes, 4);
+
+ /* Mark register R0 as dirty, as it will be used
+ * for transferring the data.
+ * It will be restored automatically when exiting
+ * debug mode
+ */
+ reg = armv8_reg_current(arm, 1);
+ reg->dirty = true;
+
+ reg = armv8_reg_current(arm, 0);
+ reg->dirty = true;
+
+ /* clear any abort */
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUDBG_DRCR, 1<<2);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* This algorithm comes from either :
+ * Cortex-A8 TRM Example 12-25
+ * Cortex-R4 TRM Example 11-26
+ * (slight differences)
+ */
+
+ /* The algorithm only copies 32 bit words, so the buffer
+ * should be expanded to include the words at either end.
+ * The first and last words will be read first to avoid
+ * corruption if needed.
+ */
+ tmp_buff = malloc(total_u32 * 4);
+
+ if ((start_byte != 0) && (total_u32 > 1)) {
+ /* First bytes not aligned - read the 32 bit word to avoid corrupting
+ * the other bytes in the word.
+ */
+ retval = aarch64_read_apb_ab_memory(target, (address & ~0x3), 4, 1, tmp_buff);
+ if (retval != ERROR_OK)
+ goto error_free_buff_w;
+ }
+
+ /* If end of write is not aligned, or the write is less than 4 bytes */
+ if ((end_byte != 0) ||
+ ((total_u32 == 1) && (total_bytes != 4))) {
+
+ /* Read the last word to avoid corruption during 32 bit write */
+ int mem_offset = (total_u32-1) * 4;
+ retval = aarch64_read_apb_ab_memory(target, (address & ~0x3) + mem_offset, 4, 1, &tmp_buff[mem_offset]);
+ if (retval != ERROR_OK)
+ goto error_free_buff_w;
+ }
+
+ /* Copy the write buffer over the top of the temporary buffer */
+ memcpy(&tmp_buff[start_byte], buffer, total_bytes);
+
+ /* We now have a 32 bit aligned buffer that can be written */
+
+ /* Read DSCR */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ goto error_free_buff_w;
+
+ /* Set DTR mode to Normal*/
+ dscr = (dscr & ~DSCR_EXT_DCC_MASK) | DSCR_EXT_DCC_NON_BLOCKING;
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, dscr);
+ if (retval != ERROR_OK)
+ goto error_free_buff_w;
+
+ if (size > 4) {
+ LOG_WARNING("reading size >4 bytes not yet supported");
+ goto error_unset_dtr_w;
+ }
+
+ retval = aarch64_instr_write_data_dcc_64(arm->dpm, 0xd5330401, address+4);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_w;
+
+ dscr = DSCR_INSTR_COMP;
+ while (i < count * size) {
+ uint32_t val;
+
+ memcpy(&val, &buffer[i], size);
+ retval = aarch64_instr_write_data_dcc(arm->dpm, 0xd5330500, val);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_w;
+
+ retval = aarch64_exec_opcode(target, 0xb81fc020, &dscr);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_w;
+
+ retval = aarch64_exec_opcode(target, 0x91001021, &dscr);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_w;
+
+ i += 4;
+ }
+
+ /* Check for sticky abort flags in the DSCR */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ goto error_free_buff_w;
+ if (dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE)) {
+ /* Abort occurred - clear it and exit */
+ LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
+ mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, 1<<2);
+ goto error_free_buff_w;
+ }
+
+ /* Done */
+ free(tmp_buff);
+ return ERROR_OK;
+
+error_unset_dtr_w:
+ /* Unset DTR mode */
+ mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ dscr = (dscr & ~DSCR_EXT_DCC_MASK) | DSCR_EXT_DCC_NON_BLOCKING;
+ mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, dscr);
+error_free_buff_w:
+ LOG_ERROR("error");
+ free(tmp_buff);
+ return ERROR_FAIL;
+}
+
+static int aarch64_read_apb_ab_memory(struct target *target,
+ target_addr_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
+{
+ /* read memory through APB-AP */
+
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ struct reg *reg;
+ uint32_t dscr, val;
+ uint8_t *tmp_buff = NULL;
+ uint32_t i = 0;
+
+ LOG_DEBUG("Reading APB-AP memory address 0x%" TARGET_PRIxADDR " size %" PRIu32 " count%" PRIu32,
+ address, size, count);
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* Mark register R0 as dirty, as it will be used
+ * for transferring the data.
+ * It will be restored automatically when exiting
+ * debug mode
+ */
+ reg = armv8_reg_current(arm, 0);
+ reg->dirty = true;
+
+ /* clear any abort */
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, 1<<2);
+ if (retval != ERROR_OK)
+ goto error_free_buff_r;
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_r;
+
+ if (size > 4) {
+ LOG_WARNING("reading size >4 bytes not yet supported");
+ goto error_unset_dtr_r;
+ }
+
+ while (i < count * size) {
+
+ retval = aarch64_instr_write_data_dcc_64(arm->dpm, 0xd5330400, address+4);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_r;
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+
+ dscr = DSCR_INSTR_COMP;
+ retval = aarch64_exec_opcode(target, 0xb85fc000, &dscr);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_r;
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+
+ retval = aarch64_instr_read_data_dcc(arm->dpm, 0xd5130400, &val);
+ if (retval != ERROR_OK)
+ goto error_unset_dtr_r;
+ memcpy(&buffer[i], &val, size);
+ i += 4;
+ address += 4;
+ }
+
+ /* Clear any sticky error */
+ mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, 1<<2);
+
+ /* Done */
+ return ERROR_OK;
+
+error_unset_dtr_r:
+ LOG_WARNING("DSCR = 0x%" PRIx32, dscr);
+ /* Todo: Unset DTR mode */
+
+error_free_buff_r:
+ LOG_ERROR("error");
+ free(tmp_buff);
+
+ /* Clear any sticky error */
+ mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DRCR, 1<<2);
+
+ return ERROR_FAIL;
+}
+
+static int aarch64_read_phys_memory(struct target *target,
+ target_addr_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ uint8_t apsel = swjdp->apsel;
+ LOG_DEBUG("Reading memory at real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32,
+ address, size, count);
+
+ if (count && buffer) {
+
+ if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
+
+ /* read memory through AHB-AP */
+ retval = mem_ap_read_buf(armv8->memory_ap, buffer, size, count, address);
+ } else {
+ /* read memory through APB-AP */
+ retval = aarch64_mmu_modify(target, 0);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = aarch64_read_apb_ab_memory(target, address, size, count, buffer);
+ }
+ }
+ return retval;
+}
+
+static int aarch64_read_memory(struct target *target, target_addr_t address,
+ uint32_t size, uint32_t count, uint8_t *buffer)
+{
+ int mmu_enabled = 0;
+ target_addr_t virt, phys;
+ int retval;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ uint8_t apsel = swjdp->apsel;
+
+ /* aarch64 handles unaligned memory access */
+ LOG_DEBUG("Reading memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
+ size, count);
+
+ /* determine if MMU was enabled on target stop */
+ if (!armv8->is_armv7r) {
+ retval = aarch64_mmu(target, &mmu_enabled);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
+ if (mmu_enabled) {
+ virt = address;
+ retval = aarch64_virt2phys(target, virt, &phys);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_DEBUG("Reading at virtual address. Translating v:0x%" TARGET_PRIxADDR " to r:0x%" TARGET_PRIxADDR,
+ virt, phys);
+ address = phys;
+ }
+ retval = aarch64_read_phys_memory(target, address, size, count,
+ buffer);
+ } else {
+ if (mmu_enabled) {
+ retval = aarch64_check_address(target, address);
+ if (retval != ERROR_OK)
+ return retval;
+ /* enable MMU as we could have disabled it for phys
+ access */
+ retval = aarch64_mmu_modify(target, 1);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ retval = aarch64_read_apb_ab_memory(target, address, size,
+ count, buffer);
+ }
+ return retval;
+}
+
+static int aarch64_write_phys_memory(struct target *target,
+ target_addr_t address, uint32_t size,
+ uint32_t count, const uint8_t *buffer)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
+ uint8_t apsel = swjdp->apsel;
+
+ LOG_DEBUG("Writing memory to real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
+ size, count);
+
+ if (count && buffer) {
+
+ if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
+
+ /* write memory through AHB-AP */
+ retval = mem_ap_write_buf(armv8->memory_ap, buffer, size, count, address);
+ } else {
+
+ /* write memory through APB-AP */
+ if (!armv8->is_armv7r) {
+ retval = aarch64_mmu_modify(target, 0);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ return aarch64_write_apb_ab_memory(target, address, size, count, buffer);
+ }
+ }
+
+
+ /* REVISIT this op is generic ARMv7-A/R stuff */
+ if (retval == ERROR_OK && target->state == TARGET_HALTED) {
+ struct arm_dpm *dpm = armv8->arm.dpm;
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* The Cache handling will NOT work with MMU active, the
+ * wrong addresses will be invalidated!
+ *
+ * For both ICache and DCache, walk all cache lines in the
+ * address range. Cortex-A8 has fixed 64 byte line length.
+ *
+ * REVISIT per ARMv7, these may trigger watchpoints ...
+ */
+
+ /* invalidate I-Cache */
+ if (armv8->armv8_mmu.armv8_cache.i_cache_enabled) {
+ /* ICIMVAU - Invalidate Cache single entry
+ * with MVA to PoU
+ * MCR p15, 0, r0, c7, c5, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
+ cacheline);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+
+ /* invalidate D-Cache */
+ if (armv8->armv8_mmu.armv8_cache.d_u_cache_enabled) {
+ /* DCIMVAC - Invalidate data Cache line
+ * with MVA to PoC
+ * MCR p15, 0, r0, c7, c6, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
+ cacheline);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+
+ /* (void) */ dpm->finish(dpm);
+ }
+
+ return retval;
+}
+
+static int aarch64_write_memory(struct target *target, target_addr_t address,
+ uint32_t size, uint32_t count, const uint8_t *buffer)
+{
+ int mmu_enabled = 0;
+ target_addr_t virt, phys;
+ int retval;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ uint8_t apsel = swjdp->apsel;
+
+ /* aarch64 handles unaligned memory access */
+ LOG_DEBUG("Writing memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32
+ "; count %" PRId32, address, size, count);
+
+ /* determine if MMU was enabled on target stop */
+ if (!armv8->is_armv7r) {
+ retval = aarch64_mmu(target, &mmu_enabled);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
+ LOG_DEBUG("Writing memory to address 0x%" TARGET_PRIxADDR "; size %"
+ PRId32 "; count %" PRId32, address, size, count);
+ if (mmu_enabled) {
+ virt = address;
+ retval = aarch64_virt2phys(target, virt, &phys);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_DEBUG("Writing to virtual address. Translating v:0x%"
+ TARGET_PRIxADDR " to r:0x%" TARGET_PRIxADDR, virt, phys);
+ address = phys;
+ }
+ retval = aarch64_write_phys_memory(target, address, size,
+ count, buffer);
+ } else {
+ if (mmu_enabled) {
+ retval = aarch64_check_address(target, address);
+ if (retval != ERROR_OK)
+ return retval;
+ /* enable MMU as we could have disabled it for phys access */
+ retval = aarch64_mmu_modify(target, 1);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ retval = aarch64_write_apb_ab_memory(target, address, size, count, buffer);
+ }
+ return retval;
+}
+
+static int aarch64_handle_target_request(void *priv)
+{
+ struct target *target = priv;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ int retval;
+
+ if (!target_was_examined(target))
+ return ERROR_OK;
+ if (!target->dbg_msg_enabled)
+ return ERROR_OK;
+
+ if (target->state == TARGET_RUNNING) {
+ uint32_t request;
+ uint32_t dscr;
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+
+ /* check if we have data */
+ while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DTRTX, &request);
+ if (retval == ERROR_OK) {
+ target_request(target, request);
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_DSCR, &dscr);
+ }
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int aarch64_examine_first(struct target *target)
+{
+ struct aarch64_common *aarch64 = target_to_aarch64(target);
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ int retval = ERROR_OK;
+ uint32_t pfr, debug, ctypr, ttypr, cpuid;
+ int i;
+
+ /* We do one extra read to ensure DAP is configured,
+ * we call ahbap_debugport_init(swjdp) instead
+ */
+ retval = dap_dp_init(swjdp);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Search for the APB-AB - it is needed for access to debug registers */
+ retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Could not find APB-AP for debug access");
+ return retval;
+ }
+
+ retval = mem_ap_init(armv8->debug_ap);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Could not initialize the APB-AP");
+ return retval;
+ }
+
+ armv8->debug_ap->memaccess_tck = 80;
+
+ /* Search for the AHB-AB */
+ armv8->memory_ap_available = false;
+ retval = dap_find_ap(swjdp, AP_TYPE_AHB_AP, &armv8->memory_ap);
+ if (retval == ERROR_OK) {
+ retval = mem_ap_init(armv8->memory_ap);
+ if (retval == ERROR_OK)
+ armv8->memory_ap_available = true;
+ }
+ if (retval != ERROR_OK) {
+ /* AHB-AP not found or unavailable - use the CPU */
+ LOG_DEBUG("No AHB-AP available for memory access");
+ }
+
+
+ if (!target->dbgbase_set) {
+ uint32_t dbgbase;
+ /* Get ROM Table base */
+ uint32_t apid;
+ int32_t coreidx = target->coreid;
+ retval = dap_get_debugbase(armv8->debug_ap, &dbgbase, &apid);
+ if (retval != ERROR_OK)
+ return retval;
+ /* Lookup 0x15 -- Processor DAP */
+ retval = dap_lookup_cs_component(armv8->debug_ap, dbgbase, 0x15,
+ &armv8->debug_base, &coreidx);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("Detected core %" PRId32 " dbgbase: %08" PRIx32,
+ coreidx, armv8->debug_base);
+ } else
+ armv8->debug_base = target->dbgbase;
+
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x300, 0);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "oslock");
+ return retval;
+ }
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x88, &cpuid);
+ LOG_DEBUG("0x88 = %x", cpuid);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x314, &cpuid);
+ LOG_DEBUG("0x314 = %x", cpuid);
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + 0x310, &cpuid);
+ LOG_DEBUG("0x310 = %x", cpuid);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_CPUID, &cpuid);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "CPUID");
+ return retval;
+ }
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_CTYPR, &ctypr);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "CTYPR");
+ return retval;
+ }
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUDBG_TTYPR, &ttypr);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "TTYPR");
+ return retval;
+ }
+
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + ID_AA64PFR0_EL1, &pfr);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
+ return retval;
+ }
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + ID_AA64DFR0_EL1, &debug);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
+ return retval;
+ }
+
+ LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
+ LOG_DEBUG("ctypr = 0x%08" PRIx32, ctypr);
+ LOG_DEBUG("ttypr = 0x%08" PRIx32, ttypr);
+ LOG_DEBUG("ID_AA64PFR0_EL1 = 0x%08" PRIx32, pfr);
+ LOG_DEBUG("ID_AA64DFR0_EL1 = 0x%08" PRIx32, debug);
+
+ armv8->arm.core_type = ARM_MODE_MON;
+ armv8->arm.core_state = ARM_STATE_AARCH64;
+ retval = aarch64_dpm_setup(aarch64, debug);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Setup Breakpoint Register Pairs */
+ aarch64->brp_num = ((debug >> 12) & 0x0F) + 1;
+ aarch64->brp_num_context = ((debug >> 28) & 0x0F) + 1;
+
+ /* hack - no context bpt support yet */
+ aarch64->brp_num_context = 0;
+
+ aarch64->brp_num_available = aarch64->brp_num;
+ aarch64->brp_list = calloc(aarch64->brp_num, sizeof(struct aarch64_brp));
+ for (i = 0; i < aarch64->brp_num; i++) {
+ aarch64->brp_list[i].used = 0;
+ if (i < (aarch64->brp_num-aarch64->brp_num_context))
+ aarch64->brp_list[i].type = BRP_NORMAL;
+ else
+ aarch64->brp_list[i].type = BRP_CONTEXT;
+ aarch64->brp_list[i].value = 0;
+ aarch64->brp_list[i].control = 0;
+ aarch64->brp_list[i].BRPn = i;
+ }
+
+ LOG_DEBUG("Configured %i hw breakpoints", aarch64->brp_num);
+
+ target_set_examined(target);
+ return ERROR_OK;
+}
+
+static int aarch64_examine(struct target *target)
+{
+ int retval = ERROR_OK;
+
+ /* don't re-probe hardware after each reset */
+ if (!target_was_examined(target))
+ retval = aarch64_examine_first(target);
+
+ /* Configure core debug access */
+ if (retval == ERROR_OK)
+ retval = aarch64_init_debug_access(target);
+
+ return retval;
+}
+
+/*
+ * Cortex-A8 target creation and initialization
+ */
+
+static int aarch64_init_target(struct command_context *cmd_ctx,
+ struct target *target)
+{
+ /* examine_first() does a bunch of this */
+ return ERROR_OK;
+}
+
+static int aarch64_init_arch_info(struct target *target,
+ struct aarch64_common *aarch64, struct jtag_tap *tap)
+{
+ struct armv8_common *armv8 = &aarch64->armv8_common;
+ struct adiv5_dap *dap = armv8->arm.dap;
+
+ armv8->arm.dap = dap;
+
+ /* Setup struct aarch64_common */
+ aarch64->common_magic = AARCH64_COMMON_MAGIC;
+ /* tap has no dap initialized */
+ if (!tap->dap) {
+ tap->dap = dap_init();
+
+ /* Leave (only) generic DAP stuff for debugport_init() */
+ tap->dap->tap = tap;
+ }
+
+ armv8->arm.dap = tap->dap;
+
+ aarch64->fast_reg_read = 0;
+
+ /* register arch-specific functions */
+ armv8->examine_debug_reason = NULL;
+
+ armv8->post_debug_entry = aarch64_post_debug_entry;
+
+ armv8->pre_restore_context = NULL;
+
+ armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
+
+ /* REVISIT v7a setup should be in a v7a-specific routine */
+ armv8_init_arch_info(target, armv8);
+ target_register_timer_callback(aarch64_handle_target_request, 1, 1, target);
+
+ return ERROR_OK;
+}
+
+static int aarch64_target_create(struct target *target, Jim_Interp *interp)
+{
+ struct aarch64_common *aarch64 = calloc(1, sizeof(struct aarch64_common));
+
+ aarch64->armv8_common.is_armv7r = false;
+
+ return aarch64_init_arch_info(target, aarch64, target->tap);
+}
+
+static int aarch64_mmu(struct target *target, int *enabled)
+{
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("%s: target not halted", __func__);
+ return ERROR_TARGET_INVALID;
+ }
+
+ *enabled = target_to_aarch64(target)->armv8_common.armv8_mmu.mmu_enabled;
+ return ERROR_OK;
+}
+
+static int aarch64_virt2phys(struct target *target, target_addr_t virt,
+ target_addr_t *phys)
+{
+ int retval = ERROR_FAIL;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct adiv5_dap *swjdp = armv8->arm.dap;
+ uint8_t apsel = swjdp->apsel;
+ if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
+ uint32_t ret;
+ retval = armv8_mmu_translate_va(target,
+ virt, &ret);
+ if (retval != ERROR_OK)
+ goto done;
+ *phys = ret;
+ } else {/* use this method if armv8->memory_ap not selected
+ * mmu must be enable in order to get a correct translation */
+ retval = aarch64_mmu_modify(target, 1);
+ if (retval != ERROR_OK)
+ goto done;
+ retval = armv8_mmu_translate_va_pa(target, virt, phys, 1);
+ }
+done:
+ return retval;
+}
+
+COMMAND_HANDLER(aarch64_handle_cache_info_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ return armv8_handle_cache_info_command(CMD_CTX,
+ &armv8->armv8_mmu.armv8_cache);
+}
+
+
+COMMAND_HANDLER(aarch64_handle_dbginit_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ if (!target_was_examined(target)) {
+ LOG_ERROR("target not examined yet");
+ return ERROR_FAIL;
+ }
+
+ return aarch64_init_debug_access(target);
+}
+COMMAND_HANDLER(aarch64_handle_smp_off_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ /* check target is an smp target */
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ target->smp = 0;
+ if (head != (struct target_list *)NULL) {
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ curr->smp = 0;
+ head = head->next;
+ }
+ /* fixes the target display to the debugger */
+ target->gdb_service->target = target;
+ }
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(aarch64_handle_smp_on_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ if (head != (struct target_list *)NULL) {
+ target->smp = 1;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ curr->smp = 1;
+ head = head->next;
+ }
+ }
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(aarch64_handle_smp_gdb_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ int retval = ERROR_OK;
+ struct target_list *head;
+ head = target->head;
+ if (head != (struct target_list *)NULL) {
+ if (CMD_ARGC == 1) {
+ int coreid = 0;
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], coreid);
+ if (ERROR_OK != retval)
+ return retval;
+ target->gdb_service->core[1] = coreid;
+
+ }
+ command_print(CMD_CTX, "gdb coreid %" PRId32 " -> %" PRId32, target->gdb_service->core[0]
+ , target->gdb_service->core[1]);
+ }
+ return ERROR_OK;
+}
+
+static const struct command_registration aarch64_exec_command_handlers[] = {
+ {
+ .name = "cache_info",
+ .handler = aarch64_handle_cache_info_command,
+ .mode = COMMAND_EXEC,
+ .help = "display information about target caches",
+ .usage = "",
+ },
+ {
+ .name = "dbginit",
+ .handler = aarch64_handle_dbginit_command,
+ .mode = COMMAND_EXEC,
+ .help = "Initialize core debug",
+ .usage = "",
+ },
+ { .name = "smp_off",
+ .handler = aarch64_handle_smp_off_command,
+ .mode = COMMAND_EXEC,
+ .help = "Stop smp handling",
+ .usage = "",
+ },
+ {
+ .name = "smp_on",
+ .handler = aarch64_handle_smp_on_command,
+ .mode = COMMAND_EXEC,
+ .help = "Restart smp handling",
+ .usage = "",
+ },
+ {
+ .name = "smp_gdb",
+ .handler = aarch64_handle_smp_gdb_command,
+ .mode = COMMAND_EXEC,
+ .help = "display/fix current core played to gdb",
+ .usage = "",
+ },
+
+
+ COMMAND_REGISTRATION_DONE
+};
+static const struct command_registration aarch64_command_handlers[] = {
+ {
+ .chain = arm_command_handlers,
+ },
+ {
+ .chain = armv8_command_handlers,
+ },
+ {
+ .name = "cortex_a",
+ .mode = COMMAND_ANY,
+ .help = "Cortex-A command group",
+ .usage = "",
+ .chain = aarch64_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct target_type aarch64_target = {
+ .name = "aarch64",
+
+ .poll = aarch64_poll,
+ .arch_state = armv8_arch_state,
+
+ .halt = aarch64_halt,
+ .resume = aarch64_resume,
+ .step = aarch64_step,
+
+ .assert_reset = aarch64_assert_reset,
+ .deassert_reset = aarch64_deassert_reset,
+
+ /* REVISIT allow exporting VFP3 registers ... */
+ .get_gdb_reg_list = armv8_get_gdb_reg_list,
+
+ .read_memory = aarch64_read_memory,
+ .write_memory = aarch64_write_memory,
+
+ .checksum_memory = arm_checksum_memory,
+ .blank_check_memory = arm_blank_check_memory,
+
+ .run_algorithm = armv4_5_run_algorithm,
+
+ .add_breakpoint = aarch64_add_breakpoint,
+ .add_context_breakpoint = aarch64_add_context_breakpoint,
+ .add_hybrid_breakpoint = aarch64_add_hybrid_breakpoint,
+ .remove_breakpoint = aarch64_remove_breakpoint,
+ .add_watchpoint = NULL,
+ .remove_watchpoint = NULL,
+
+ .commands = aarch64_command_handlers,
+ .target_create = aarch64_target_create,
+ .init_target = aarch64_init_target,
+ .examine = aarch64_examine,
+
+ .read_phys_memory = aarch64_read_phys_memory,
+ .write_phys_memory = aarch64_write_phys_memory,
+ .mmu = aarch64_mmu,
+ .virt2phys = aarch64_virt2phys,
+};
--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2015 by David Ung *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <helper/replacements.h>
+
+#include "armv8.h"
+#include "arm_disassembler.h"
+
+#include "register.h"
+#include <helper/binarybuffer.h>
+#include <helper/command.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "arm_opcodes.h"
+#include "target.h"
+#include "target_type.h"
+
+static int armv8_read_core_reg(struct target *target, struct reg *r,
+ int num, enum arm_mode mode)
+{
+ uint64_t reg_value;
+ int retval;
+ struct arm_reg *armv8_core_reg;
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ assert(num < (int)armv8->arm.core_cache->num_regs);
+
+ armv8_core_reg = armv8->arm.core_cache->reg_list[num].arch_info;
+ retval = armv8->load_core_reg_u64(target,
+ armv8_core_reg->num, ®_value);
+
+ buf_set_u64(armv8->arm.core_cache->reg_list[num].value, 0, 64, reg_value);
+ armv8->arm.core_cache->reg_list[num].valid = 1;
+ armv8->arm.core_cache->reg_list[num].dirty = 0;
+
+ return retval;
+}
+
+#if 0
+static int armv8_write_core_reg(struct target *target, struct reg *r,
+ int num, enum arm_mode mode, target_addr_t value)
+{
+ int retval;
+ struct arm_reg *armv8_core_reg;
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ assert(num < (int)armv8->arm.core_cache->num_regs);
+
+ armv8_core_reg = armv8->arm.core_cache->reg_list[num].arch_info;
+ retval = armv8->store_core_reg_u64(target,
+ armv8_core_reg->num,
+ value);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("JTAG failure");
+ armv8->arm.core_cache->reg_list[num].dirty = armv8->arm.core_cache->reg_list[num].valid;
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ LOG_DEBUG("write core reg %i value 0x%" PRIx64 "", num, value);
+ armv8->arm.core_cache->reg_list[num].valid = 1;
+ armv8->arm.core_cache->reg_list[num].dirty = 0;
+
+ return ERROR_OK;
+}
+#endif
+
+static void armv8_show_fault_registers(struct target *target)
+{
+ /* TODO */
+}
+
+static int armv8_read_ttbcr(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t ttbcr;
+ int retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+ /* MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
+ &ttbcr);
+ if (retval != ERROR_OK)
+ goto done;
+ armv8->armv8_mmu.ttbr1_used = ((ttbcr & 0x7) != 0) ? 1 : 0;
+ armv8->armv8_mmu.ttbr0_mask = 7 << (32 - ((ttbcr & 0x7)));
+#if 0
+ LOG_INFO("ttb1 %s ,ttb0_mask %x",
+ armv8->armv8_mmu.ttbr1_used ? "used" : "not used",
+ armv8->armv8_mmu.ttbr0_mask);
+#endif
+ if (armv8->armv8_mmu.ttbr1_used == 1) {
+ LOG_INFO("SVC access above %" PRIx32,
+ (uint32_t)(0xffffffff & armv8->armv8_mmu.ttbr0_mask));
+ armv8->armv8_mmu.os_border = 0xffffffff & armv8->armv8_mmu.ttbr0_mask;
+ } else {
+ /* fix me , default is hard coded LINUX border */
+ armv8->armv8_mmu.os_border = 0xc0000000;
+ }
+done:
+ dpm->finish(dpm);
+ return retval;
+}
+
+
+/* method adapted to cortex A : reused arm v4 v5 method*/
+int armv8_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val)
+{
+ uint32_t first_lvl_descriptor = 0x0;
+ uint32_t second_lvl_descriptor = 0x0;
+ int retval;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t ttb = 0; /* default ttb0 */
+ if (armv8->armv8_mmu.ttbr1_used == -1)
+ armv8_read_ttbcr(target);
+ if ((armv8->armv8_mmu.ttbr1_used) &&
+ (va > (0xffffffff & armv8->armv8_mmu.ttbr0_mask))) {
+ /* select ttb 1 */
+ ttb = 1;
+ }
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* MRC p15,0,<Rt>,c2,c0,ttb */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 0, 0, 2, 0, ttb),
+ &ttb);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = armv8->armv8_mmu.read_physical_memory(target,
+ (ttb & 0xffffc000) | ((va & 0xfff00000) >> 18),
+ 4, 1, (uint8_t *)&first_lvl_descriptor);
+ if (retval != ERROR_OK)
+ return retval;
+ first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
+ &first_lvl_descriptor);
+ /* reuse armv4_5 piece of code, specific armv8 changes may come later */
+ LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor);
+
+ if ((first_lvl_descriptor & 0x3) == 0) {
+ LOG_ERROR("Address translation failure");
+ return ERROR_TARGET_TRANSLATION_FAULT;
+ }
+
+
+ if ((first_lvl_descriptor & 0x3) == 2) {
+ /* section descriptor */
+ *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
+ return ERROR_OK;
+ }
+
+ if ((first_lvl_descriptor & 0x3) == 1) {
+ /* coarse page table */
+ retval = armv8->armv8_mmu.read_physical_memory(target,
+ (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
+ 4, 1, (uint8_t *)&second_lvl_descriptor);
+ if (retval != ERROR_OK)
+ return retval;
+ } else if ((first_lvl_descriptor & 0x3) == 3) {
+ /* fine page table */
+ retval = armv8->armv8_mmu.read_physical_memory(target,
+ (first_lvl_descriptor & 0xfffff000) | ((va & 0x000ffc00) >> 8),
+ 4, 1, (uint8_t *)&second_lvl_descriptor);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
+ &second_lvl_descriptor);
+
+ LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor);
+
+ if ((second_lvl_descriptor & 0x3) == 0) {
+ LOG_ERROR("Address translation failure");
+ return ERROR_TARGET_TRANSLATION_FAULT;
+ }
+
+ if ((second_lvl_descriptor & 0x3) == 1) {
+ /* large page descriptor */
+ *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
+ return ERROR_OK;
+ }
+
+ if ((second_lvl_descriptor & 0x3) == 2) {
+ /* small page descriptor */
+ *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
+ return ERROR_OK;
+ }
+
+ if ((second_lvl_descriptor & 0x3) == 3) {
+ *val = (second_lvl_descriptor & 0xfffffc00) | (va & 0x000003ff);
+ return ERROR_OK;
+ }
+
+ /* should not happen */
+ LOG_ERROR("Address translation failure");
+ return ERROR_TARGET_TRANSLATION_FAULT;
+
+done:
+ return retval;
+}
+
+/* V8 method VA TO PA */
+int armv8_mmu_translate_va_pa(struct target *target, target_addr_t va,
+ target_addr_t *val, int meminfo)
+{
+ return ERROR_OK;
+}
+
+static int armv8_handle_inner_cache_info_command(struct command_context *cmd_ctx,
+ struct armv8_cache_common *armv8_cache)
+{
+ if (armv8_cache->ctype == -1) {
+ command_print(cmd_ctx, "cache not yet identified");
+ return ERROR_OK;
+ }
+
+ command_print(cmd_ctx,
+ "D-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
+ armv8_cache->d_u_size.linelen,
+ armv8_cache->d_u_size.associativity,
+ armv8_cache->d_u_size.nsets,
+ armv8_cache->d_u_size.cachesize);
+
+ command_print(cmd_ctx,
+ "I-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
+ armv8_cache->i_size.linelen,
+ armv8_cache->i_size.associativity,
+ armv8_cache->i_size.nsets,
+ armv8_cache->i_size.cachesize);
+
+ return ERROR_OK;
+}
+
+static int _armv8_flush_all_data(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ struct armv8_cachesize *d_u_size =
+ &(armv8->armv8_mmu.armv8_cache.d_u_size);
+ int32_t c_way, c_index = d_u_size->index;
+ int retval;
+ /* check that cache data is on at target halt */
+ if (!armv8->armv8_mmu.armv8_cache.d_u_cache_enabled) {
+ LOG_INFO("flushed not performed :cache not on at target halt");
+ return ERROR_OK;
+ }
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+ do {
+ c_way = d_u_size->way;
+ do {
+ uint32_t value = (c_index << d_u_size->index_shift)
+ | (c_way << d_u_size->way_shift);
+ /* DCCISW */
+ /* LOG_INFO ("%d %d %x",c_way,c_index,value); */
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 14, 2),
+ value);
+ if (retval != ERROR_OK)
+ goto done;
+ c_way -= 1;
+ } while (c_way >= 0);
+ c_index -= 1;
+ } while (c_index >= 0);
+ return retval;
+done:
+ LOG_ERROR("flushed failed");
+ dpm->finish(dpm);
+ return retval;
+}
+
+static int armv8_flush_all_data(struct target *target)
+{
+ int retval = ERROR_FAIL;
+ /* check that armv8_cache is correctly identify */
+ struct armv8_common *armv8 = target_to_armv8(target);
+ if (armv8->armv8_mmu.armv8_cache.ctype == -1) {
+ LOG_ERROR("trying to flush un-identified cache");
+ return retval;
+ }
+
+ if (target->smp) {
+ /* look if all the other target have been flushed in order to flush level
+ * 2 */
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if (curr->state == TARGET_HALTED) {
+ LOG_INFO("Wait flushing data l1 on core %" PRId32, curr->coreid);
+ retval = _armv8_flush_all_data(curr);
+ }
+ head = head->next;
+ }
+ } else
+ retval = _armv8_flush_all_data(target);
+ return retval;
+}
+
+int armv8_handle_cache_info_command(struct command_context *cmd_ctx,
+ struct armv8_cache_common *armv8_cache)
+{
+ if (armv8_cache->ctype == -1) {
+ command_print(cmd_ctx, "cache not yet identified");
+ return ERROR_OK;
+ }
+
+ if (armv8_cache->display_cache_info)
+ armv8_cache->display_cache_info(cmd_ctx, armv8_cache);
+ return ERROR_OK;
+}
+
+/* retrieve core id cluster id */
+static int armv8_read_mpidr(struct target *target)
+{
+ int retval = ERROR_FAIL;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t mpidr;
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+ /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
+
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
+ &mpidr);
+ if (retval != ERROR_OK)
+ goto done;
+ if (mpidr & 1<<31) {
+ armv8->multi_processor_system = (mpidr >> 30) & 1;
+ armv8->cluster_id = (mpidr >> 8) & 0xf;
+ armv8->cpu_id = mpidr & 0x3;
+ LOG_INFO("%s cluster %x core %x %s", target_name(target),
+ armv8->cluster_id,
+ armv8->cpu_id,
+ armv8->multi_processor_system == 0 ? "multi core" : "mono core");
+
+ } else
+ LOG_ERROR("mpdir not in multiprocessor format");
+
+done:
+ dpm->finish(dpm);
+ return retval;
+
+
+}
+
+int armv8_identify_cache(struct target *target)
+{
+ /* read cache descriptor */
+ int retval = ERROR_FAIL;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t cache_selected, clidr;
+ uint32_t cache_i_reg, cache_d_reg;
+ struct armv8_cache_common *cache = &(armv8->armv8_mmu.armv8_cache);
+ if (!armv8->is_armv7r)
+ armv8_read_ttbcr(target);
+ retval = dpm->prepare(dpm);
+
+ if (retval != ERROR_OK)
+ goto done;
+ /* retrieve CLIDR
+ * mrc p15, 1, r0, c0, c0, 1 @ read clidr */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
+ &clidr);
+ if (retval != ERROR_OK)
+ goto done;
+ clidr = (clidr & 0x7000000) >> 23;
+ LOG_INFO("number of cache level %" PRIx32, (uint32_t)(clidr / 2));
+ if ((clidr / 2) > 1) {
+ /* FIXME not supported present in cortex A8 and later */
+ /* in cortex A7, A15 */
+ LOG_ERROR("cache l2 present :not supported");
+ }
+ /* retrieve selected cache
+ * MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
+ &cache_selected);
+ if (retval != ERROR_OK)
+ goto done;
+
+ retval = armv8->arm.mrc(target, 15,
+ 2, 0, /* op1, op2 */
+ 0, 0, /* CRn, CRm */
+ &cache_selected);
+ if (retval != ERROR_OK)
+ goto done;
+ /* select instruction cache
+ * MCR p15, 2,<Rd>, c0, c0, 0; Write CSSELR
+ * [0] : 1 instruction cache selection , 0 data cache selection */
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
+ 1);
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* read CCSIDR
+ * MRC P15,1,<RT>,C0, C0,0 ;on cortex A9 read CCSIDR
+ * [2:0] line size 001 eight word per line
+ * [27:13] NumSet 0x7f 16KB, 0xff 32Kbytes, 0x1ff 64Kbytes */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
+ &cache_i_reg);
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* select data cache*/
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
+ 0);
+ if (retval != ERROR_OK)
+ goto done;
+
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
+ &cache_d_reg);
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* restore selected cache */
+ dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
+ cache_selected);
+
+ if (retval != ERROR_OK)
+ goto done;
+ dpm->finish(dpm);
+
+ /* put fake type */
+ cache->d_u_size.linelen = 16 << (cache_d_reg & 0x7);
+ cache->d_u_size.cachesize = (((cache_d_reg >> 13) & 0x7fff)+1)/8;
+ cache->d_u_size.nsets = (cache_d_reg >> 13) & 0x7fff;
+ cache->d_u_size.associativity = ((cache_d_reg >> 3) & 0x3ff) + 1;
+ /* compute info for set way operation on cache */
+ cache->d_u_size.index_shift = (cache_d_reg & 0x7) + 4;
+ cache->d_u_size.index = (cache_d_reg >> 13) & 0x7fff;
+ cache->d_u_size.way = ((cache_d_reg >> 3) & 0x3ff);
+ cache->d_u_size.way_shift = cache->d_u_size.way + 1;
+ {
+ int i = 0;
+ while (((cache->d_u_size.way_shift >> i) & 1) != 1)
+ i++;
+ cache->d_u_size.way_shift = 32-i;
+ }
+#if 0
+ LOG_INFO("data cache index %d << %d, way %d << %d",
+ cache->d_u_size.index, cache->d_u_size.index_shift,
+ cache->d_u_size.way,
+ cache->d_u_size.way_shift);
+
+ LOG_INFO("data cache %d bytes %d KBytes asso %d ways",
+ cache->d_u_size.linelen,
+ cache->d_u_size.cachesize,
+ cache->d_u_size.associativity);
+#endif
+ cache->i_size.linelen = 16 << (cache_i_reg & 0x7);
+ cache->i_size.associativity = ((cache_i_reg >> 3) & 0x3ff) + 1;
+ cache->i_size.nsets = (cache_i_reg >> 13) & 0x7fff;
+ cache->i_size.cachesize = (((cache_i_reg >> 13) & 0x7fff)+1)/8;
+ /* compute info for set way operation on cache */
+ cache->i_size.index_shift = (cache_i_reg & 0x7) + 4;
+ cache->i_size.index = (cache_i_reg >> 13) & 0x7fff;
+ cache->i_size.way = ((cache_i_reg >> 3) & 0x3ff);
+ cache->i_size.way_shift = cache->i_size.way + 1;
+ {
+ int i = 0;
+ while (((cache->i_size.way_shift >> i) & 1) != 1)
+ i++;
+ cache->i_size.way_shift = 32-i;
+ }
+#if 0
+ LOG_INFO("instruction cache index %d << %d, way %d << %d",
+ cache->i_size.index, cache->i_size.index_shift,
+ cache->i_size.way, cache->i_size.way_shift);
+
+ LOG_INFO("instruction cache %d bytes %d KBytes asso %d ways",
+ cache->i_size.linelen,
+ cache->i_size.cachesize,
+ cache->i_size.associativity);
+#endif
+ /* if no l2 cache initialize l1 data cache flush function function */
+ if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache == NULL) {
+ armv8->armv8_mmu.armv8_cache.display_cache_info =
+ armv8_handle_inner_cache_info_command;
+ armv8->armv8_mmu.armv8_cache.flush_all_data_cache =
+ armv8_flush_all_data;
+ }
+ armv8->armv8_mmu.armv8_cache.ctype = 0;
+
+done:
+ dpm->finish(dpm);
+ armv8_read_mpidr(target);
+ return retval;
+
+}
+
+int armv8_init_arch_info(struct target *target, struct armv8_common *armv8)
+{
+ struct arm *arm = &armv8->arm;
+ arm->arch_info = armv8;
+ target->arch_info = &armv8->arm;
+ /* target is useful in all function arm v4 5 compatible */
+ armv8->arm.target = target;
+ armv8->arm.common_magic = ARM_COMMON_MAGIC;
+ armv8->common_magic = ARMV8_COMMON_MAGIC;
+
+ arm->read_core_reg = armv8_read_core_reg;
+#if 0
+ arm->write_core_reg = armv8_write_core_reg;
+#endif
+
+ armv8->armv8_mmu.armv8_cache.l2_cache = NULL;
+ armv8->armv8_mmu.armv8_cache.ctype = -1;
+ armv8->armv8_mmu.armv8_cache.flush_all_data_cache = NULL;
+ armv8->armv8_mmu.armv8_cache.display_cache_info = NULL;
+ return ERROR_OK;
+}
+
+int armv8_arch_state(struct target *target)
+{
+ static const char * const state[] = {
+ "disabled", "enabled"
+ };
+
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+
+ if (armv8->common_magic != ARMV8_COMMON_MAGIC) {
+ LOG_ERROR("BUG: called for a non-Armv8 target");
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+
+ arm_arch_state(target);
+
+ if (armv8->is_armv7r) {
+ LOG_USER("D-Cache: %s, I-Cache: %s",
+ state[armv8->armv8_mmu.armv8_cache.d_u_cache_enabled],
+ state[armv8->armv8_mmu.armv8_cache.i_cache_enabled]);
+ } else {
+ LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
+ state[armv8->armv8_mmu.mmu_enabled],
+ state[armv8->armv8_mmu.armv8_cache.d_u_cache_enabled],
+ state[armv8->armv8_mmu.armv8_cache.i_cache_enabled]);
+ }
+
+ if (arm->core_mode == ARM_MODE_ABT)
+ armv8_show_fault_registers(target);
+ if (target->debug_reason == DBG_REASON_WATCHPOINT)
+ LOG_USER("Watchpoint triggered at PC %#08x",
+ (unsigned) armv8->dpm.wp_pc);
+
+ return ERROR_OK;
+}
+
+static const struct {
+ unsigned id;
+ const char *name;
+ unsigned bits;
+ enum reg_type type;
+ const char *group;
+ const char *feature;
+} armv8_regs[] = {
+ { ARMV8_R0, "x0", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R1, "x1", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R2, "x2", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R3, "x3", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R4, "x4", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R5, "x5", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R6, "x6", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R7, "x7", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R8, "x8", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R9, "x9", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R10, "x10", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R11, "x11", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R12, "x12", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R13, "x13", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R14, "x14", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R15, "x15", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R16, "x16", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R17, "x17", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R18, "x18", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R19, "x19", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R20, "x20", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R21, "x21", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R22, "x22", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R23, "x23", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R24, "x24", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R25, "x25", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R26, "x26", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R27, "x27", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R28, "x28", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R29, "x29", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_R30, "x30", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+
+ { ARMV8_R31, "sp", 64, REG_TYPE_DATA_PTR, "general", "org.gnu.gdb.aarch64.core" },
+ { ARMV8_PC, "pc", 64, REG_TYPE_CODE_PTR, "general", "org.gnu.gdb.aarch64.core" },
+
+ { ARMV8_xPSR, "CPSR", 64, REG_TYPE_INT, "general", "org.gnu.gdb.aarch64.core" },
+};
+
+#define ARMV8_NUM_REGS ARRAY_SIZE(armv8_regs)
+
+
+static int armv8_get_core_reg(struct reg *reg)
+{
+ int retval;
+ struct arm_reg *armv8_reg = reg->arch_info;
+ struct target *target = armv8_reg->target;
+ struct arm *arm = target_to_arm(target);
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ retval = arm->read_core_reg(target, reg, armv8_reg->num, arm->core_mode);
+
+ return retval;
+}
+
+static int armv8_set_core_reg(struct reg *reg, uint8_t *buf)
+{
+ struct arm_reg *armv8_reg = reg->arch_info;
+ struct target *target = armv8_reg->target;
+ uint64_t value = buf_get_u64(buf, 0, 64);
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ buf_set_u64(reg->value, 0, 64, value);
+ reg->dirty = 1;
+ reg->valid = 1;
+
+ return ERROR_OK;
+}
+
+static const struct reg_arch_type armv8_reg_type = {
+ .get = armv8_get_core_reg,
+ .set = armv8_set_core_reg,
+};
+
+/** Builds cache of architecturally defined registers. */
+struct reg_cache *armv8_build_reg_cache(struct target *target)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+ int num_regs = ARMV8_NUM_REGS;
+ struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
+ struct reg_cache *cache = malloc(sizeof(struct reg_cache));
+ struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
+ struct arm_reg *arch_info = calloc(num_regs, sizeof(struct arm_reg));
+ struct reg_feature *feature;
+ int i;
+
+ /* Build the process context cache */
+ cache->name = "arm v8 registers";
+ cache->next = NULL;
+ cache->reg_list = reg_list;
+ cache->num_regs = num_regs;
+ (*cache_p) = cache;
+
+ for (i = 0; i < num_regs; i++) {
+ arch_info[i].num = armv8_regs[i].id;
+ arch_info[i].target = target;
+ arch_info[i].arm = arm;
+
+ reg_list[i].name = armv8_regs[i].name;
+ reg_list[i].size = armv8_regs[i].bits;
+ reg_list[i].value = calloc(1, 4);
+ reg_list[i].dirty = 0;
+ reg_list[i].valid = 0;
+ reg_list[i].type = &armv8_reg_type;
+ reg_list[i].arch_info = &arch_info[i];
+
+ reg_list[i].group = armv8_regs[i].group;
+ reg_list[i].number = i;
+ reg_list[i].exist = true;
+ reg_list[i].caller_save = true; /* gdb defaults to true */
+
+ feature = calloc(1, sizeof(struct reg_feature));
+ if (feature) {
+ feature->name = armv8_regs[i].feature;
+ reg_list[i].feature = feature;
+ } else
+ LOG_ERROR("unable to allocate feature list");
+
+ reg_list[i].reg_data_type = calloc(1, sizeof(struct reg_data_type));
+ if (reg_list[i].reg_data_type)
+ reg_list[i].reg_data_type->type = armv8_regs[i].type;
+ else
+ LOG_ERROR("unable to allocate reg type list");
+ }
+
+ arm->cpsr = reg_list + ARMV8_xPSR;
+ arm->pc = reg_list + ARMV8_PC;
+ arm->core_cache = cache;
+
+ return cache;
+}
+
+struct reg *armv8_reg_current(struct arm *arm, unsigned regnum)
+{
+ struct reg *r;
+
+ if (regnum > 33)
+ return NULL;
+
+ r = arm->core_cache->reg_list + regnum;
+ return r;
+}
+
+const struct command_registration armv8_command_handlers[] = {
+ {
+ .chain = dap_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+
+int armv8_get_gdb_reg_list(struct target *target,
+ struct reg **reg_list[], int *reg_list_size,
+ enum target_register_class reg_class)
+{
+ struct arm *arm = target_to_arm(target);
+ int i;
+
+ switch (reg_class) {
+ case REG_CLASS_GENERAL:
+ case REG_CLASS_ALL:
+ *reg_list_size = 34;
+ *reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
+
+ for (i = 0; i < *reg_list_size; i++)
+ (*reg_list)[i] = armv8_reg_current(arm, i);
+
+ return ERROR_OK;
+ break;
+
+ default:
+ LOG_ERROR("not a valid register class type in query.");
+ return ERROR_FAIL;
+ break;
+ }
+}
Code Review / openocd.git / commitdiff