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riscv-openocd/src/target/mips64.c

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/*
* Support for processors implementing MIPS64 instruction set
*
* Copyright (C) 2014 by Andrey Sidorov <anysidorov@gmail.com>
* Copyright (C) 2014 by Aleksey Kuleshov <rndfax@yandex.ru>
* Copyright (C) 2014 by Antony Pavlov <antonynpavlov@gmail.com>
* Copyright (C) 2014 by Peter Mamonov <pmamonov@gmail.com>
*
* Based on the work of:
* Copyright (C) 2008 by Spencer Oliver
* Copyright (C) 2008 by David T.L. Wong
* Copyright (C) 2010 by Konstantin Kostyukhin, Nikolay Shmyrev
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mips64.h"
static const struct {
unsigned id;
const char *name;
enum reg_type type;
const char *group;
const char *feature;
int flag;
} mips64_regs[] = {
{ 0, "r0", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 1, "r1", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 2, "r2", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 3, "r3", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 4, "r4", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 5, "r5", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 6, "r6", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 7, "r7", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 8, "r8", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 9, "r9", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 10, "r10", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 11, "r11", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 12, "r12", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 13, "r13", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 14, "r14", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 15, "r15", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 16, "r16", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 17, "r17", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 18, "r18", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 19, "r19", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 20, "r20", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 21, "r21", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 22, "r22", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 23, "r23", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 24, "r24", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 25, "r25", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 26, "r26", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 27, "r27", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 28, "r28", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 29, "r29", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 30, "r30", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 31, "r31", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 32, "lo", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 33, "hi", REG_TYPE_UINT64, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ MIPS64_NUM_CORE_REGS + 0, "pc", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cpu", 0 },
{ MIPS64_NUM_CORE_REGS + 1, "Random", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 2, "Entrylo_0", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 3, "Entrylo_1", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 4, "Context", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 5, "Pagemask", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 6, "Wired", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 7, "badvaddr", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 8, "Count", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 9, "EntryHi", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 10, "Compare", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 11, "status", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 12, "cause", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 13, "EPC", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 14, "PrID", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 15, "Config", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 16, "LLA", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 17, "WatchLo0", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 18, "WatchLo1", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 19, "WatchHi0", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 20, "WatchHi1", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 21, "Xcontext", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 22, "ChipMemCtrl", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 23, "Debug", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 24, "Perfcount, sel=0", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 25, "Perfcount, sel=1", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 26, "Perfcount, sel=2", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 27, "Perfcount, sel=3", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 28, "ECC", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 29, "CacheErr", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 30, "TagLo", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 31, "TagHi", REG_TYPE_UINT32, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 32, "DataHi", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_REGS + 33, "EEPC", REG_TYPE_UINT64, NULL,
"org.gnu.gdb.mips.cp0", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 0, "f0", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 1, "f1", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 2, "f2", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 3, "f3", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 4, "f4", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 5, "f5", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 6, "f6", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 7, "f7", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 8, "f8", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 9, "f9", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 10, "f10", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 11, "f11", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 12, "f12", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 13, "f13", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 14, "f14", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 15, "f15", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 16, "f16", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 17, "f17", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 18, "f18", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 19, "f19", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 20, "f20", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 21, "f21", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 22, "f22", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 23, "f23", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 24, "f24", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 25, "f25", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 26, "f26", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 27, "f27", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 28, "f28", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 29, "f29", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 30, "f30", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 31, "f31", REG_TYPE_IEEE_DOUBLE, NULL,
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 32, "fcsr", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 33, "fir", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 34, "fconfig", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 35, "fccr", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 36, "fexr", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
{ MIPS64_NUM_CORE_C0_REGS + 37, "fenr", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", 0 },
};
static int reg_type2size(enum reg_type type)
{
switch (type) {
case REG_TYPE_UINT32:
case REG_TYPE_INT:
return 32;
case REG_TYPE_UINT64:
case REG_TYPE_IEEE_DOUBLE:
return 64;
default:
return 64;
}
}
static int mips64_get_core_reg(struct reg *reg)
{
int retval;
struct mips64_core_reg *mips64_reg = reg->arch_info;
struct target *target = mips64_reg->target;
struct mips64_common *mips64_target = target->arch_info;
if (target->state != TARGET_HALTED)
return ERROR_TARGET_NOT_HALTED;
retval = mips64_target->read_core_reg(target, mips64_reg->num);
return retval;
}
static int mips64_set_core_reg(struct reg *reg, uint8_t *buf)
{
struct mips64_core_reg *mips64_reg = reg->arch_info;
struct target *target = mips64_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 int mips64_read_core_reg(struct target *target, int num)
{
uint64_t reg_value;
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
if ((num < 0) || (num >= MIPS64_NUM_REGS))
return ERROR_COMMAND_ARGUMENT_INVALID;
reg_value = mips64->core_regs[num];
buf_set_u64(mips64->core_cache->reg_list[num].value, 0, 64, reg_value);
mips64->core_cache->reg_list[num].valid = 1;
mips64->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
static int mips64_write_core_reg(struct target *target, int num)
{
uint64_t reg_value;
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
if ((num < 0) || (num >= MIPS64_NUM_REGS))
return ERROR_COMMAND_ARGUMENT_INVALID;
reg_value = buf_get_u64(mips64->core_cache->reg_list[num].value, 0, 64);
mips64->core_regs[num] = reg_value;
LOG_DEBUG("write core reg %i value 0x%" PRIx64 "", num, reg_value);
mips64->core_cache->reg_list[num].valid = 1;
mips64->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
int mips64_invalidate_core_regs(struct target *target)
{
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
unsigned int i;
for (i = 0; i < mips64->core_cache->num_regs; i++) {
mips64->core_cache->reg_list[i].valid = 0;
mips64->core_cache->reg_list[i].dirty = 0;
}
return ERROR_OK;
}
int mips64_get_gdb_reg_list(struct target *target, struct reg **reg_list[],
int *reg_list_size, enum target_register_class reg_class)
{
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
register int i;
/* include floating point registers */
*reg_list_size = MIPS64_NUM_REGS;
*reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
for (i = 0; i < MIPS64_NUM_REGS; i++)
(*reg_list)[i] = &mips64->core_cache->reg_list[i];
return ERROR_OK;
}
int mips64_save_context(struct target *target)
{
int retval;
struct mips64_common *mips64 = target->arch_info;
struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
retval = mips64_pracc_read_regs(ejtag_info, mips64->core_regs);
if (retval != ERROR_OK)
return retval;
for (unsigned i = 0; i < MIPS64_NUM_REGS; i++)
retval = mips64->read_core_reg(target, i);
return retval;
}
int mips64_restore_context(struct target *target)
{
struct mips64_common *mips64 = target->arch_info;
struct mips_ejtag *ejtag_info = &mips64->ejtag_info;
for (unsigned i = 0; i < MIPS64_NUM_REGS; i++) {
if (mips64->core_cache->reg_list[i].dirty)
mips64->write_core_reg(target, i);
}
return mips64_pracc_write_regs(ejtag_info, mips64->core_regs);
}
int mips64_arch_state(struct target *target)
{
struct mips64_common *mips64 = target->arch_info;
struct reg *pc = &mips64->core_cache->reg_list[MIPS64_PC];
if (mips64->common_magic != MIPS64_COMMON_MAGIC) {
LOG_ERROR("BUG: called for a non-MIPS64 target");
exit(-1);
}
LOG_USER("target halted due to %s, pc: 0x%" PRIx64 "",
debug_reason_name(target), buf_get_u64(pc->value, 0, 64));
return ERROR_OK;
}
static const struct reg_arch_type mips64_reg_type = {
.get = mips64_get_core_reg,
.set = mips64_set_core_reg,
};
int mips64_build_reg_cache(struct target *target)
{
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
struct reg_cache **cache_p, *cache;
struct mips64_core_reg *arch_info = NULL;
struct reg *reg_list = NULL;
unsigned i;
cache = calloc(1, sizeof(*cache));
if (!cache) {
LOG_ERROR("unable to allocate cache");
return ERROR_FAIL;
}
reg_list = calloc(MIPS64_NUM_REGS, sizeof(*reg_list));
if (!reg_list) {
LOG_ERROR("unable to allocate reg_list");
goto alloc_fail;
}
arch_info = calloc(MIPS64_NUM_REGS, sizeof(*arch_info));
if (!arch_info) {
LOG_ERROR("unable to allocate arch_info");
goto alloc_fail;
}
for (i = 0; i < MIPS64_NUM_REGS; i++) {
struct mips64_core_reg *a = &arch_info[i];
struct reg *r = &reg_list[i];
r->arch_info = &arch_info[i];
r->caller_save = true; /* gdb defaults to true */
r->exist = true;
r->feature = &a->feature;
r->feature->name = mips64_regs[i].feature;
r->group = mips64_regs[i].group;
r->name = mips64_regs[i].name;
r->number = i;
r->reg_data_type = &a->reg_data_type;
r->reg_data_type->type = mips64_regs[i].type;
r->size = reg_type2size(mips64_regs[i].type);
r->type = &mips64_reg_type;
r->value = &a->value[0];
a->mips64_common = mips64;
a->num = mips64_regs[i].id;
a->target = target;
}
cache->name = "mips64 registers";
cache->reg_list = reg_list;
cache->num_regs = MIPS64_NUM_REGS;
cache_p = register_get_last_cache_p(&target->reg_cache);
(*cache_p) = cache;
mips64->core_cache = cache;
return ERROR_OK;
alloc_fail:
free(cache);
free(reg_list);
free(arch_info);
return ERROR_FAIL;
}
int mips64_init_arch_info(struct target *target, struct mips64_common *mips64,
struct jtag_tap *tap)
{
mips64->bp_scanned = false;
mips64->common_magic = MIPS64_COMMON_MAGIC;
mips64->data_break_list = NULL;
mips64->ejtag_info.tap = tap;
mips64->fast_data_area = NULL;
mips64->mips64mode32 = false;
mips64->read_core_reg = mips64_read_core_reg;
mips64->write_core_reg = mips64_write_core_reg;
return ERROR_OK;
}
int mips64_run_algorithm(struct target *target, int num_mem_params,
struct mem_param *mem_params, int num_reg_params,
struct reg_param *reg_params, target_addr_t entry_point,
target_addr_t exit_point, int timeout_ms, void *arch_info)
{
/* TODO */
return ERROR_OK;
}
int mips64_examine(struct target *target)
{
struct mips64_common *mips64 = target->arch_info;
if (target_was_examined(target))
return ERROR_OK;
/* TODO: why we do not do mips64_configure_break_unit() here? */
mips64->bp_scanned = false;
mips64->num_data_bpoints = 0;
mips64->num_data_bpoints_avail = 0;
mips64->num_inst_bpoints = 0;
mips64->num_inst_bpoints_avail = 0;
target_set_examined(target);
return ERROR_OK;
}
static int mips64_configure_i_break_unit(struct target *target)
{
/* get pointers to arch-specific information */
struct mips64_common *mips64 = target->arch_info;
struct mips64_comparator *ibl;
uint64_t bpinfo;
int retval;
int i;
/* get number of inst breakpoints */
retval = target_read_u64(target, EJTAG64_V25_IBS, &bpinfo);
if (retval != ERROR_OK)
return retval;
mips64->num_inst_bpoints = (bpinfo >> 24) & 0x0F;
mips64->num_inst_bpoints_avail = mips64->num_inst_bpoints;
ibl = calloc(mips64->num_inst_bpoints, sizeof(*ibl));
if (!ibl) {
LOG_ERROR("unable to allocate inst_break_list");
return ERROR_FAIL;
}
for (i = 0; i < mips64->num_inst_bpoints; i++)
ibl[i].reg_address = EJTAG64_V25_IBA0 + (0x100 * i);
mips64->inst_break_list = ibl;
/* clear IBIS reg */
retval = target_write_u64(target, EJTAG64_V25_IBS, 0);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int mips64_configure_d_break_unit(struct target *target)
{
struct mips64_common *mips64 = target->arch_info;
struct mips64_comparator *dbl;
uint64_t bpinfo;
int retval;
int i;
/* get number of data breakpoints */
retval = target_read_u64(target, EJTAG64_V25_DBS, &bpinfo);
if (retval != ERROR_OK)
return retval;
mips64->num_data_bpoints = (bpinfo >> 24) & 0x0F;
mips64->num_data_bpoints_avail = mips64->num_data_bpoints;
dbl = calloc(mips64->num_data_bpoints, sizeof(*dbl));
if (!dbl) {
LOG_ERROR("unable to allocate data_break_list");
return ERROR_FAIL;
}
for (i = 0; i < mips64->num_data_bpoints; i++)
dbl[i].reg_address = EJTAG64_V25_DBA0 + (0x100 * i);
mips64->data_break_list = dbl;
/* clear DBIS reg */
retval = target_write_u64(target, EJTAG64_V25_DBS, 0);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
int mips64_configure_break_unit(struct target *target)
{
struct mips64_common *mips64 = target->arch_info;
uint64_t dcr;
int retval;
if (mips64->bp_scanned)
return ERROR_OK;
/* get info about breakpoint support */
retval = target_read_u64(target, EJTAG64_DCR, &dcr);
if (retval != ERROR_OK)
return retval;
if (dcr & EJTAG64_DCR_IB) {
retval = mips64_configure_i_break_unit(target);
if (retval != ERROR_OK)
return retval;
}
if (dcr & EJTAG64_DCR_DB) {
retval = mips64_configure_d_break_unit(target);
if (retval != ERROR_OK)
return retval;
}
LOG_DEBUG("DCR 0x%" PRIx64 " numinst %i numdata %i", dcr,
mips64->num_inst_bpoints, mips64->num_data_bpoints);
mips64->bp_scanned = true;
return ERROR_OK;
}
int mips64_enable_interrupts(struct target *target, bool enable)
{
int retval;
bool update = false;
uint64_t dcr;
/* read debug control register */
retval = target_read_u64(target, EJTAG64_DCR, &dcr);
if (retval != ERROR_OK)
return retval;
if (enable) {
if (!(dcr & EJTAG64_DCR_INTE)) {
/* enable interrupts */
dcr |= EJTAG64_DCR_INTE;
update = true;
}
} else {
if (dcr & EJTAG64_DCR_INTE) {
/* disable interrupts */
dcr &= ~(uint64_t)EJTAG64_DCR_INTE;
update = true;
}
}
if (update) {
retval = target_write_u64(target, EJTAG64_DCR, dcr);
if (retval != ERROR_OK)
return retval;
}
return ERROR_OK;
}
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