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openocd/src/target/arm926ejs.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* Copyright (C) 2007 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008,2009 by Øyvind Harboe *
* oyvind.harboe@zylin.com *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "arm926ejs.h"
#include <helper/time_support.h>
#include "target_type.h"
#include "register.h"
#include "arm_opcodes.h"
/*
* The ARM926 is built around the ARM9EJ-S core, and most JTAG docs
* are in the ARM9EJ-S Technical Reference Manual (ARM DDI 0222B) not
* the ARM926 manual (ARM DDI 0198E). The scan chains are:
*
* 1 ... core debugging
* 2 ... EmbeddedICE
* 3 ... external boundary scan (SoC-specific, unused here)
* 6 ... ETM
* 15 ... coprocessor 15
*/
#if 0
#define _DEBUG_INSTRUCTION_EXECUTION_
#endif
#define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, crn, crm) ((opcode_1 << 11) | (opcode_2 << 8) | (crn << 4) | (crm << 0))
static int arm926ejs_cp15_read(struct target *target, uint32_t op1, uint32_t op2,
uint32_t crn, uint32_t crm, uint32_t *value)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
uint32_t address = ARM926EJS_CP15_ADDR(op1, op2, crn, crm);
struct scan_field fields[4];
uint8_t address_buf[2] = {0, 0};
uint8_t nr_w_buf = 0;
uint8_t access_t = 1;
buf_set_u32(address_buf, 0, 14, address);
retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
retval = arm_jtag_set_instr(jtag_info->tap, jtag_info->intest_instr, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
fields[0].num_bits = 32;
fields[0].out_value = NULL;
fields[0].in_value = (uint8_t *)value;
fields[1].num_bits = 1;
fields[1].out_value = &access_t;
fields[1].in_value = &access_t;
fields[2].num_bits = 14;
fields[2].out_value = address_buf;
fields[2].in_value = NULL;
fields[3].num_bits = 1;
fields[3].out_value = &nr_w_buf;
fields[3].in_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 4, fields, TAP_IDLE);
int64_t then = timeval_ms();
for (;;) {
/* rescan with NOP, to wait for the access to complete */
access_t = 0;
nr_w_buf = 0;
jtag_add_dr_scan(jtag_info->tap, 4, fields, TAP_IDLE);
jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
if (buf_get_u32(&access_t, 0, 1) == 1)
break;
/* 10ms timeout */
if ((timeval_ms()-then) > 10) {
LOG_ERROR("cp15 read operation timed out");
return ERROR_FAIL;
}
}
#ifdef _DEBUG_INSTRUCTION_EXECUTION_
LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value);
#endif
retval = arm_jtag_set_instr(jtag_info->tap, 0xc, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int arm926ejs_mrc(struct target *target, int cpnum, uint32_t op1,
uint32_t op2, uint32_t crn, uint32_t crm, uint32_t *value)
{
if (cpnum != 15) {
LOG_ERROR("Only cp15 is supported");
return ERROR_FAIL;
}
return arm926ejs_cp15_read(target, op1, op2, crn, crm, value);
}
static int arm926ejs_cp15_write(struct target *target, uint32_t op1, uint32_t op2,
uint32_t crn, uint32_t crm, uint32_t value)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
uint32_t address = ARM926EJS_CP15_ADDR(op1, op2, crn, crm);
struct scan_field fields[4];
uint8_t value_buf[4];
uint8_t address_buf[2] = {0, 0};
uint8_t nr_w_buf = 1;
uint8_t access_t = 1;
buf_set_u32(address_buf, 0, 14, address);
buf_set_u32(value_buf, 0, 32, value);
retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
retval = arm_jtag_set_instr(jtag_info->tap, jtag_info->intest_instr, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
fields[0].num_bits = 32;
fields[0].out_value = value_buf;
fields[0].in_value = NULL;
fields[1].num_bits = 1;
fields[1].out_value = &access_t;
fields[1].in_value = &access_t;
fields[2].num_bits = 14;
fields[2].out_value = address_buf;
fields[2].in_value = NULL;
fields[3].num_bits = 1;
fields[3].out_value = &nr_w_buf;
fields[3].in_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 4, fields, TAP_IDLE);
int64_t then = timeval_ms();
for (;;) {
/* rescan with NOP, to wait for the access to complete */
access_t = 0;
nr_w_buf = 0;
jtag_add_dr_scan(jtag_info->tap, 4, fields, TAP_IDLE);
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
if (buf_get_u32(&access_t, 0, 1) == 1)
break;
/* 10ms timeout */
if ((timeval_ms()-then) > 10) {
LOG_ERROR("cp15 write operation timed out");
return ERROR_FAIL;
}
}
#ifdef _DEBUG_INSTRUCTION_EXECUTION_
LOG_DEBUG("addr: 0x%x value: %8.8x", address, value);
#endif
retval = arm_jtag_set_instr(jtag_info->tap, 0xf, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int arm926ejs_mcr(struct target *target, int cpnum, uint32_t op1,
uint32_t op2, uint32_t crn, uint32_t crm, uint32_t value)
{
if (cpnum != 15) {
LOG_ERROR("Only cp15 is supported");
return ERROR_FAIL;
}
return arm926ejs_cp15_write(target, op1, op2, crn, crm, value);
}
static int arm926ejs_examine_debug_reason(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
int debug_reason;
int retval;
embeddedice_read_reg(dbg_stat);
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
/* Method-Of-Entry (MOE) field */
debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
switch (debug_reason) {
case 0:
LOG_DEBUG("no *NEW* debug entry (?missed one?)");
/* ... since last restart or debug reset ... */
target->debug_reason = DBG_REASON_DBGRQ;
break;
case 1:
LOG_DEBUG("breakpoint from EICE unit 0");
target->debug_reason = DBG_REASON_BREAKPOINT;
break;
case 2:
LOG_DEBUG("breakpoint from EICE unit 1");
target->debug_reason = DBG_REASON_BREAKPOINT;
break;
case 3:
LOG_DEBUG("soft breakpoint (BKPT instruction)");
target->debug_reason = DBG_REASON_BREAKPOINT;
break;
case 4:
LOG_DEBUG("vector catch breakpoint");
target->debug_reason = DBG_REASON_BREAKPOINT;
break;
case 5:
LOG_DEBUG("external breakpoint");
target->debug_reason = DBG_REASON_BREAKPOINT;
break;
case 6:
LOG_DEBUG("watchpoint from EICE unit 0");
target->debug_reason = DBG_REASON_WATCHPOINT;
break;
case 7:
LOG_DEBUG("watchpoint from EICE unit 1");
target->debug_reason = DBG_REASON_WATCHPOINT;
break;
case 8:
LOG_DEBUG("external watchpoint");
target->debug_reason = DBG_REASON_WATCHPOINT;
break;
case 9:
LOG_DEBUG("internal debug request");
target->debug_reason = DBG_REASON_DBGRQ;
break;
case 10:
LOG_DEBUG("external debug request");
target->debug_reason = DBG_REASON_DBGRQ;
break;
case 11:
LOG_DEBUG("debug re-entry from system speed access");
/* This is normal when connecting to something that's
* already halted, or in some related code paths, but
* otherwise is surprising (and presumably wrong).
*/
switch (target->debug_reason) {
case DBG_REASON_DBGRQ:
break;
default:
LOG_ERROR("unexpected -- debug re-entry");
/* FALLTHROUGH */
case DBG_REASON_UNDEFINED:
target->debug_reason = DBG_REASON_DBGRQ;
break;
}
break;
case 12:
/* FIX!!!! here be dragons!!! We need to fail here so
* the target will interpreted as halted but we won't
* try to talk to it right now... a resume + halt seems
* to sync things up again. Please send an email to
* openocd development mailing list if you have hardware
* to donate to look into this problem....
*/
LOG_WARNING("WARNING: mystery debug reason MOE = 0xc. Try issuing a resume + halt.");
target->debug_reason = DBG_REASON_DBGRQ;
break;
default:
LOG_WARNING("WARNING: unknown debug reason: 0x%x", debug_reason);
/* Oh agony! should we interpret this as a halt request or
* that the target stopped on it's own accord?
*/
target->debug_reason = DBG_REASON_DBGRQ;
/* if we fail here, we won't talk to the target and it will
* be reported to be in the halted state */
break;
}
return ERROR_OK;
}
static int arm926ejs_get_ttb(struct target *target, uint32_t *result)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
int retval;
uint32_t ttb = 0x0;
retval = arm926ejs->read_cp15(target, 0, 0, 2, 0, &ttb);
if (retval != ERROR_OK)
return retval;
*result = ttb;
return ERROR_OK;
}
static int arm926ejs_disable_mmu_caches(struct target *target, int mmu,
int d_u_cache, int i_cache)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
uint32_t cp15_control;
int retval;
/* read cp15 control register */
retval = arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
if (retval != ERROR_OK)
return retval;
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
if (mmu) {
/* invalidate TLB */
retval = arm926ejs->write_cp15(target, 0, 0, 8, 7, 0x0);
if (retval != ERROR_OK)
return retval;
cp15_control &= ~0x1U;
}
if (d_u_cache) {
uint32_t debug_override;
/* read-modify-write CP15 debug override register
* to enable "test and clean all" */
retval = arm926ejs->read_cp15(target, 0, 0, 15, 0, &debug_override);
if (retval != ERROR_OK)
return retval;
debug_override |= 0x80000;
retval = arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
if (retval != ERROR_OK)
return retval;
/* clean and invalidate DCache */
retval = arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
if (retval != ERROR_OK)
return retval;
/* write CP15 debug override register
* to disable "test and clean all" */
debug_override &= ~0x80000;
retval = arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
if (retval != ERROR_OK)
return retval;
cp15_control &= ~0x4U;
}
if (i_cache) {
/* invalidate ICache */
retval = arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
if (retval != ERROR_OK)
return retval;
cp15_control &= ~0x1000U;
}
retval = arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
return retval;
}
static int arm926ejs_enable_mmu_caches(struct target *target, int mmu,
int d_u_cache, int i_cache)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
uint32_t cp15_control;
int retval;
/* read cp15 control register */
retval = arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
if (retval != ERROR_OK)
return retval;
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
if (mmu)
cp15_control |= 0x1U;
if (d_u_cache)
cp15_control |= 0x4U;
if (i_cache)
cp15_control |= 0x1000U;
retval = arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
return retval;
}
static int arm926ejs_post_debug_entry(struct target *target)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
int retval;
/* examine cp15 control reg */
retval = arm926ejs->read_cp15(target, 0, 0, 1, 0, &arm926ejs->cp15_control_reg);
if (retval != ERROR_OK)
return retval;
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
LOG_DEBUG("cp15_control_reg: %8.8" PRIx32 "", arm926ejs->cp15_control_reg);
if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1) {
uint32_t cache_type_reg;
/* identify caches */
retval = arm926ejs->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
if (retval != ERROR_OK)
return retval;
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
}
arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
/* save i/d fault status and address register */
retval = arm926ejs->read_cp15(target, 0, 0, 5, 0, &arm926ejs->d_fsr);
if (retval != ERROR_OK)
return retval;
retval = arm926ejs->read_cp15(target, 0, 1, 5, 0, &arm926ejs->i_fsr);
if (retval != ERROR_OK)
return retval;
retval = arm926ejs->read_cp15(target, 0, 0, 6, 0, &arm926ejs->d_far);
if (retval != ERROR_OK)
return retval;
LOG_DEBUG("D FSR: 0x%8.8" PRIx32 ", D FAR: 0x%8.8" PRIx32 ", I FSR: 0x%8.8" PRIx32 "",
arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
uint32_t cache_dbg_ctrl;
/* read-modify-write CP15 cache debug control register
* to disable I/D-cache linefills and force WT */
retval = arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
if (retval != ERROR_OK)
return retval;
cache_dbg_ctrl |= 0x7;
retval = arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
return retval;
}
static void arm926ejs_pre_restore_context(struct target *target)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
/* restore i/d fault status and address register */
arm926ejs->write_cp15(target, 0, 0, 5, 0, arm926ejs->d_fsr);
arm926ejs->write_cp15(target, 0, 1, 5, 0, arm926ejs->i_fsr);
arm926ejs->write_cp15(target, 0, 0, 6, 0, arm926ejs->d_far);
uint32_t cache_dbg_ctrl;
/* read-modify-write CP15 cache debug control register
* to reenable I/D-cache linefills and disable WT */
arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
cache_dbg_ctrl &= ~0x7;
arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
}
static const char arm926_not[] = "target is not an ARM926";
static int arm926ejs_verify_pointer(struct command_invocation *cmd,
struct arm926ejs_common *arm926)
{
if (arm926->common_magic != ARM926EJS_COMMON_MAGIC) {
command_print(cmd, arm926_not);
return ERROR_TARGET_INVALID;
}
return ERROR_OK;
}
/** Logs summary of ARM926 state for a halted target. */
int arm926ejs_arch_state(struct target *target)
{
static const char *state[] = {
"disabled", "enabled"
};
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC) {
LOG_ERROR("BUG: %s", arm926_not);
return ERROR_TARGET_INVALID;
}
arm_arch_state(target);
LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
state[arm926ejs->armv4_5_mmu.mmu_enabled],
state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
return ERROR_OK;
}
int arm926ejs_soft_reset_halt(struct target *target)
{
int retval = ERROR_OK;
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm *arm = &arm7_9->arm;
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
retval = target_halt(target);
if (retval != ERROR_OK)
return retval;
int64_t then = timeval_ms();
int timeout;
while (!(timeout = ((timeval_ms()-then) > 1000))) {
if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0) {
embeddedice_read_reg(dbg_stat);
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
} else
break;
if (debug_level >= 1) {
/* do not eat all CPU, time out after 1 se*/
alive_sleep(100);
} else
keep_alive();
}
if (timeout) {
LOG_ERROR("Failed to halt CPU after 1 sec");
return ERROR_TARGET_TIMEOUT;
}
target->state = TARGET_HALTED;
/* SVC, ARM state, IRQ and FIQ disabled */
uint32_t cpsr;
cpsr = buf_get_u32(arm->cpsr->value, 0, 32);
cpsr &= ~0xff;
cpsr |= 0xd3;
arm_set_cpsr(arm, cpsr);
arm->cpsr->dirty = true;
/* start fetching from 0x0 */
buf_set_u32(arm->pc->value, 0, 32, 0x0);
arm->pc->dirty = true;
arm->pc->valid = true;
retval = arm926ejs_disable_mmu_caches(target, 1, 1, 1);
if (retval != ERROR_OK)
return retval;
arm926ejs->armv4_5_mmu.mmu_enabled = 0;
arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
}
/** Writes a buffer, in the specified word size, with current MMU settings. */
int arm926ejs_write_memory(struct target *target, target_addr_t address,
uint32_t size, uint32_t count, const uint8_t *buffer)
{
int retval;
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
/* FIX!!!! this should be cleaned up and made much more general. The
* plan is to write up and test on arm926ejs specifically and
* then generalize and clean up afterwards.
*
*
* Also it should be moved to the callbacks that handle breakpoints
* specifically and not the generic memory write fn's. See XScale code.
**/
if (arm926ejs->armv4_5_mmu.mmu_enabled && (count == 1) && ((size == 2) || (size == 4))) {
/* special case the handling of single word writes to bypass MMU
* to allow implementation of breakpoints in memory marked read only
* by MMU */
if (arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) {
/* flush and invalidate data cache
*
* MCR p15,0,p,c7,c10,1 - clean cache line using virtual address
*
*/
retval = arm926ejs->write_cp15(target, 0, 1, 7, 10, address&~0x3);
if (retval != ERROR_OK)
return retval;
}
target_addr_t pa;
retval = target->type->virt2phys(target, address, &pa);
if (retval != ERROR_OK)
return retval;
/* write directly to physical memory bypassing any read only MMU bits, etc. */
retval = armv4_5_mmu_write_physical(target, &arm926ejs->armv4_5_mmu, pa, size, count, buffer);
if (retval != ERROR_OK)
return retval;
} else {
retval = arm7_9_write_memory(target, address, size, count, buffer);
if (retval != ERROR_OK)
return retval;
}
/* If ICache is enabled, we have to invalidate affected ICache lines
* the DCache is forced to write-through, so we don't have to clean it here
*/
if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled) {
if (count <= 1) {
/* invalidate ICache single entry with MVA */
arm926ejs->write_cp15(target, 0, 1, 7, 5, address);
} else {
/* invalidate ICache */
arm926ejs->write_cp15(target, 0, 0, 7, 5, address);
}
}
return retval;
}
static int arm926ejs_write_phys_memory(struct target *target,
target_addr_t address, uint32_t size,
uint32_t count, const uint8_t *buffer)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
return armv4_5_mmu_write_physical(target, &arm926ejs->armv4_5_mmu,
address, size, count, buffer);
}
static int arm926ejs_read_phys_memory(struct target *target,
target_addr_t address, uint32_t size,
uint32_t count, uint8_t *buffer)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
return armv4_5_mmu_read_physical(target, &arm926ejs->armv4_5_mmu,
address, size, count, buffer);
}
int arm926ejs_init_arch_info(struct target *target, struct arm926ejs_common *arm926ejs,
struct jtag_tap *tap)
{
struct arm7_9_common *arm7_9 = &arm926ejs->arm7_9_common;
arm7_9->arm.mrc = arm926ejs_mrc;
arm7_9->arm.mcr = arm926ejs_mcr;
/* initialize arm7/arm9 specific info (including armv4_5) */
arm9tdmi_init_arch_info(target, arm7_9, tap);
arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
arm7_9->write_memory = arm926ejs_write_memory;
arm926ejs->read_cp15 = arm926ejs_cp15_read;
arm926ejs->write_cp15 = arm926ejs_cp15_write;
arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
arm926ejs->armv4_5_mmu.mmu_enabled = 0;
arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
/* The ARM926EJ-S implements the ARMv5TE architecture which
* has the BKPT instruction, so we don't have to use a watchpoint comparator
*/
arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
return ERROR_OK;
}
static int arm926ejs_target_create(struct target *target, Jim_Interp *interp)
{
struct arm926ejs_common *arm926ejs = calloc(1, sizeof(struct arm926ejs_common));
/* ARM9EJ-S core always reports 0x1 in Capture-IR */
target->tap->ir_capture_mask = 0x0f;
return arm926ejs_init_arch_info(target, arm926ejs, target->tap);
}
static void arm926ejs_deinit_target(struct target *target)
{
struct arm *arm = target_to_arm(target);
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
arm7_9_deinit(target);
arm_free_reg_cache(arm);
free(arm926ejs);
}
COMMAND_HANDLER(arm926ejs_handle_cache_info_command)
{
int retval;
struct target *target = get_current_target(CMD_CTX);
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
retval = arm926ejs_verify_pointer(CMD, arm926ejs);
if (retval != ERROR_OK)
return retval;
return armv4_5_handle_cache_info_command(CMD, &arm926ejs->armv4_5_mmu.armv4_5_cache);
}
static int arm926ejs_virt2phys(struct target *target, target_addr_t virtual, target_addr_t *physical)
{
uint32_t cb;
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
uint32_t ret;
int retval = armv4_5_mmu_translate_va(target, &arm926ejs->armv4_5_mmu,
virtual, &cb, &ret);
if (retval != ERROR_OK)
return retval;
*physical = ret;
return ERROR_OK;
}
static int arm926ejs_mmu(struct target *target, int *enabled)
{
struct arm926ejs_common *arm926ejs = target_to_arm926(target);
if (target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_INVALID;
}
*enabled = arm926ejs->armv4_5_mmu.mmu_enabled;
return ERROR_OK;
}
static const struct command_registration arm926ejs_exec_command_handlers[] = {
{
.name = "cache_info",
.handler = arm926ejs_handle_cache_info_command,
.mode = COMMAND_EXEC,
.usage = "",
.help = "display information about target caches",
},
COMMAND_REGISTRATION_DONE
};
const struct command_registration arm926ejs_command_handlers[] = {
{
.chain = arm9tdmi_command_handlers,
},
{
.name = "arm926ejs",
.mode = COMMAND_ANY,
.help = "arm926ejs command group",
.usage = "",
.chain = arm926ejs_exec_command_handlers,
},
COMMAND_REGISTRATION_DONE
};
/** Holds methods for ARM926 targets. */
struct target_type arm926ejs_target = {
.name = "arm926ejs",
.poll = arm7_9_poll,
.arch_state = arm926ejs_arch_state,
.target_request_data = arm7_9_target_request_data,
.halt = arm7_9_halt,
.resume = arm7_9_resume,
.step = arm7_9_step,
.assert_reset = arm7_9_assert_reset,
.deassert_reset = arm7_9_deassert_reset,
.soft_reset_halt = arm926ejs_soft_reset_halt,
.get_gdb_arch = arm_get_gdb_arch,
.get_gdb_reg_list = arm_get_gdb_reg_list,
.read_memory = arm7_9_read_memory,
.write_memory = arm7_9_write_memory_opt,
.checksum_memory = arm_checksum_memory,
.blank_check_memory = arm_blank_check_memory,
.run_algorithm = armv4_5_run_algorithm,
.add_breakpoint = arm7_9_add_breakpoint,
.remove_breakpoint = arm7_9_remove_breakpoint,
.add_watchpoint = arm7_9_add_watchpoint,
.remove_watchpoint = arm7_9_remove_watchpoint,
.commands = arm926ejs_command_handlers,
.target_create = arm926ejs_target_create,
.init_target = arm9tdmi_init_target,
.deinit_target = arm926ejs_deinit_target,
.examine = arm7_9_examine,
.check_reset = arm7_9_check_reset,
.virt2phys = arm926ejs_virt2phys,
.mmu = arm926ejs_mmu,
.read_phys_memory = arm926ejs_read_phys_memory,
.write_phys_memory = arm926ejs_write_phys_memory,
};
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