int mips32_configure_break_unit(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int retval;
uint32_t dcr, bpinfo;
int i;
if (mips32->bp_scanned)
return ERROR_OK;
/* get info about breakpoint support */
retval = target_read_u32(target, EJTAG_DCR, &dcr);
if (retval != ERROR_OK)
return retval;
if (dcr & EJTAG_DCR_IB) {
/* get number of inst breakpoints */
retval = target_read_u32(target, EJTAG_IBS, &bpinfo);
if (retval != ERROR_OK)
return retval;
mips32->num_inst_bpoints = (bpinfo >> 24) & 0x0F;
mips32->num_inst_bpoints_avail = mips32->num_inst_bpoints;
mips32->inst_break_list = calloc(mips32->num_inst_bpoints, sizeof(struct mips32_comparator));
for (i = 0; i < mips32->num_inst_bpoints; i++)
mips32->inst_break_list[i].reg_address = EJTAG_IBA1 + (0x100 * i);
/* clear IBIS reg */
retval = target_write_u32(target, EJTAG_IBS, 0);
if (retval != ERROR_OK)
return retval;
}
static int mips32_configure_dbs(struct target *target)
{
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
int retval, i;
uint32_t bpinfo;
/* get number of data breakpoints */
retval = target_read_u32(target, ejtag_info->ejtag_dbs_addr, &bpinfo);
if (retval != ERROR_OK)
return retval;
mips32->num_data_bpoints = (bpinfo >> 24) & 0x0F;
mips32->num_data_bpoints_avail = mips32->num_data_bpoints;
mips32->data_break_list = calloc(mips32->num_data_bpoints,
sizeof(struct mips32_comparator));
for (i = 0; i < mips32->num_data_bpoints; i++)
mips32->data_break_list[i].reg_address =
ejtag_info->ejtag_dba0_addr +
(ejtag_info->ejtag_dba_step_size * i);
/* clear DBIS reg */
retval = target_write_u32(target, ejtag_info->ejtag_dbs_addr, 0);
return retval;
}
int mips32_configure_break_unit(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
int retval;
uint32_t dcr;
if (mips32->bp_scanned)
return ERROR_OK;
/* get info about breakpoint support */
retval = target_read_u32(target, EJTAG_DCR, &dcr);
if (retval != ERROR_OK)
return retval;
/* EJTAG 2.0 defines IB and DB bits in IMP instead of DCR. */
if (ejtag_info->ejtag_version == EJTAG_VERSION_20) {
ejtag_info->debug_caps = dcr & EJTAG_DCR_ENM;
if (!(ejtag_info->impcode & EJTAG_V20_IMP_NOIB))
ejtag_info->debug_caps |= EJTAG_DCR_IB;
if (!(ejtag_info->impcode & EJTAG_V20_IMP_NODB))
ejtag_info->debug_caps |= EJTAG_DCR_DB;
} else
/* keep debug caps for later use */
ejtag_info->debug_caps = dcr & (EJTAG_DCR_ENM
| EJTAG_DCR_IB | EJTAG_DCR_DB);
if (ejtag_info->debug_caps & EJTAG_DCR_IB) {
retval = mips32_configure_ibs(target);
if (retval != ERROR_OK)
return retval;
}
if (ejtag_info->debug_caps & EJTAG_DCR_DB) {
retval = mips32_configure_dbs(target);
if (retval != ERROR_OK)
return retval;
}
/* check if target endianness settings matches debug control register */
if (((ejtag_info->debug_caps & EJTAG_DCR_ENM)
&& (target->endianness == TARGET_LITTLE_ENDIAN)) ||
(!(ejtag_info->debug_caps & EJTAG_DCR_ENM)
&& (target->endianness == TARGET_BIG_ENDIAN)))
LOG_WARNING("DCR endianness settings does not match target settings");
LOG_DEBUG("DCR 0x%" PRIx32 " numinst %i numdata %i", dcr, mips32->num_inst_bpoints,
mips32->num_data_bpoints);
mips32->bp_scanned = 1;
return ERROR_OK;
}
int mips32_arch_state(struct target *target)
{
struct mips32_common *mips32 = target_to_mips32(target);
LOG_USER("target halted in %s mode due to %s, pc: 0x%8.8" PRIx32 "",
mips_isa_strings[mips32->isa_mode],
debug_reason_name(target),
buf_get_u32(mips32->core_cache->reg_list[MIPS32_PC].value, 0, 32));
return ERROR_OK;
}
static int mips32_get_core_reg(struct reg *reg)
{
int retval;
struct mips32_core_reg *mips32_reg = reg->arch_info;
struct target *target = mips32_reg->target;
struct mips32_common *mips32_target = target_to_mips32(target);
if (target->state != TARGET_HALTED)
return ERROR_TARGET_NOT_HALTED;
retval = mips32_target->read_core_reg(target, mips32_reg->num);
return retval;
}
int mips32_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 mips32_common *mips32 = target_to_mips32(target);
unsigned int i;
/* include floating point registers */
*reg_list_size = MIPS32_NUM_REGS;
*reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
for (i = 0; i < MIPS32_NUM_REGS; i++)
(*reg_list)[i] = &mips32->core_cache->reg_list[i];
return ERROR_OK;
}
static int mips32_read_core_reg(struct target *target, int num)
{
uint32_t reg_value;
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
if ((num < 0) || (num >= MIPS32NUMCOREREGS))
return ERROR_COMMAND_SYNTAX_ERROR;
reg_value = mips32->core_regs[num];
buf_set_u32(mips32->core_cache->reg_list[num].value, 0, 32, reg_value);
mips32->core_cache->reg_list[num].valid = 1;
mips32->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
int mips32_examine(struct target *target)
{
struct mips32_common *mips32 = target_to_mips32(target);
if (!target_was_examined(target)) {
target_set_examined(target);
/* we will configure later */
mips32->bp_scanned = 0;
mips32->num_inst_bpoints = 0;
mips32->num_data_bpoints = 0;
mips32->num_inst_bpoints_avail = 0;
mips32->num_data_bpoints_avail = 0;
}
return ERROR_OK;
}
int mips32_configure_break_unit(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
int retval;
uint32_t dcr;
if (mips32->bp_scanned)
return ERROR_OK;
/* get info about breakpoint support */
retval = target_read_u32(target, EJTAG_DCR, &dcr);
if (retval != ERROR_OK)
return retval;
/* EJTAG 2.0 does not specify EJTAG_DCR_IB and EJTAG_DCR_DB bits,
* assume IB and DB registers are always present. */
if (ejtag_info->ejtag_version == EJTAG_VERSION_20)
dcr |= EJTAG_DCR_IB | EJTAG_DCR_DB;
if (dcr & EJTAG_DCR_IB) {
retval = mips32_configure_ibs(target);
if (retval != ERROR_OK)
return retval;
}
if (dcr & EJTAG_DCR_DB) {
retval = mips32_configure_dbs(target);
if (retval != ERROR_OK)
return retval;
}
/* check if target endianness settings matches debug control register */
if (((dcr & EJTAG_DCR_ENM) && (target->endianness == TARGET_LITTLE_ENDIAN)) ||
(!(dcr & EJTAG_DCR_ENM) && (target->endianness == TARGET_BIG_ENDIAN)))
LOG_WARNING("DCR endianness settings does not match target settings");
LOG_DEBUG("DCR 0x%" PRIx32 " numinst %i numdata %i", dcr, mips32->num_inst_bpoints,
mips32->num_data_bpoints);
mips32->bp_scanned = 1;
return ERROR_OK;
}
static int mips32_write_core_reg(struct target *target, int num)
{
uint32_t reg_value;
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
if ((num < 0) || (num >= MIPS32NUMCOREREGS))
return ERROR_COMMAND_SYNTAX_ERROR;
reg_value = buf_get_u32(mips32->core_cache->reg_list[num].value, 0, 32);
mips32->core_regs[num] = reg_value;
LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", num , reg_value);
mips32->core_cache->reg_list[num].valid = 1;
mips32->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
int mips32_restore_context(struct target *target)
{
int i;
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
for (i = 0; i < MIPS32NUMCOREREGS; i++) {
if (mips32->core_cache->reg_list[i].dirty)
mips32->write_core_reg(target, i);
}
/* write core regs */
mips32_pracc_write_regs(ejtag_info, mips32->core_regs);
return ERROR_OK;
}
int mips32_save_context(struct target *target)
{
int i;
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
/* read core registers */
mips32_pracc_read_regs(ejtag_info, mips32->core_regs);
for (i = 0; i < MIPS32NUMCOREREGS; i++) {
if (!mips32->core_cache->reg_list[i].valid)
mips32->read_core_reg(target, i);
}
return ERROR_OK;
}
int mips32_get_gdb_reg_list(struct target *target, struct reg **reg_list[], int *reg_list_size)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int i;
/* include floating point registers */
*reg_list_size = MIPS32NUMCOREREGS + MIPS32NUMFPREGS;
*reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
for (i = 0; i < MIPS32NUMCOREREGS; i++)
(*reg_list)[i] = &mips32->core_cache->reg_list[i];
/* add dummy floating points regs */
for (i = MIPS32NUMCOREREGS; i < (MIPS32NUMCOREREGS + MIPS32NUMFPREGS); i++)
(*reg_list)[i] = &mips32_gdb_dummy_fp_reg;
return ERROR_OK;
}
struct reg_cache *mips32_build_reg_cache(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int num_regs = MIPS32NUMCOREREGS;
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 = malloc(sizeof(struct reg) * num_regs);
struct mips32_core_reg *arch_info = malloc(sizeof(struct mips32_core_reg) * num_regs);
int i;
register_init_dummy(&mips32_gdb_dummy_fp_reg);
/* Build the process context cache */
cache->name = "mips32 registers";
cache->next = NULL;
cache->reg_list = reg_list;
cache->num_regs = num_regs;
(*cache_p) = cache;
mips32->core_cache = cache;
for (i = 0; i < num_regs; i++)
{
arch_info[i] = mips32_core_reg_list_arch_info[i];
arch_info[i].target = target;
arch_info[i].mips32_common = mips32;
reg_list[i].name = mips32_core_reg_list[i];
reg_list[i].size = 32;
reg_list[i].value = calloc(1, 4);
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
reg_list[i].type = &mips32_reg_type;
reg_list[i].arch_info = &arch_info[i];
}
return cache;
}
static int ath79_spi_bitbang_chunk(struct flash_bank *bank,
uint8_t *data, int len, int *transferred)
{
struct target *target = bank->target;
struct ath79_flash_bank *ath79_info = bank->driver_priv;
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
int pracc_words;
/*
* These constants must match the worst case in the above code
* generator function ath79_spi_bitbang_codegen.
*/
const int pracc_pre_post = 26;
const int pracc_loop_byte = 8 * 2 + 2;
struct pracc_queue_info ctx = {
.ejtag_info = ejtag_info
};
int max_len = (PRACC_MAX_INSTRUCTIONS - pracc_pre_post) / pracc_loop_byte;
int to_xfer = len > max_len ? max_len : len;
int partial_xfer = len != to_xfer;
int padded_len = (to_xfer + 3) & ~3;
uint32_t *out = malloc(padded_len);
if (!out) {
LOG_ERROR("not enough memory");
return ERROR_FAIL;
}
*transferred = 0;
pracc_queue_init(&ctx);
LOG_DEBUG("ath79_spi_bitbang_bytes(%p, %08x, %p, %d)",
target, ath79_info->io_base, data, len);
LOG_DEBUG("max code %d => max len %d. to_xfer %d",
PRACC_MAX_INSTRUCTIONS, max_len, to_xfer);
pracc_words = ath79_spi_bitbang_codegen(
ath79_info, &ctx, data, to_xfer, partial_xfer);
LOG_DEBUG("Assembled %d instructions, %d stores",
ctx.code_count, ctx.store_count);
ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, out, 1);
if (ctx.retval != ERROR_OK)
goto exit;
if (to_xfer & 3) { /* Not a multiple of 4 bytes. */
/*
* Need to realign last word since we didn't shift the
* full 32 bits.
*/
int missed_bytes = 4 - (to_xfer & 3);
out[pracc_words - 1] <<= BITS_PER_BYTE * missed_bytes;
}
/*
* pracc reads return uint32_t in host endianness, convert to
* target endianness.
* Since we know the ATH79 target is big endian and the SPI
* shift register has the bytes in highest to lowest bit order,
* this will ensure correct memory byte order regardless of host
* endianness.
*/
target_buffer_set_u32_array(target, (uint8_t *)out, pracc_words, out);
if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
for (int i = 0; i < to_xfer; i++) {
LOG_DEBUG("bitbang %02x => %02x",
data[i], ((uint8_t *)out)[i]);
}
}
memcpy(data, out, to_xfer);
*transferred = to_xfer;
exit:
pracc_queue_free(&ctx);
free(out);
return ctx.retval;
}
int mips32_configure_break_unit(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int retval;
uint32_t dcr, bpinfo;
int i;
if (mips32->bp_scanned)
return ERROR_OK;
/* get info about breakpoint support */
if ((retval = target_read_u32(target, EJTAG_DCR, &dcr)) != ERROR_OK)
return retval;
if (dcr & EJTAG_DCR_IB)
{
/* get number of inst breakpoints */
if ((retval = target_read_u32(target, EJTAG_IBS, &bpinfo)) != ERROR_OK)
return retval;
mips32->num_inst_bpoints = (bpinfo >> 24) & 0x0F;
mips32->num_inst_bpoints_avail = mips32->num_inst_bpoints;
mips32->inst_break_list = calloc(mips32->num_inst_bpoints, sizeof(struct mips32_comparator));
for (i = 0; i < mips32->num_inst_bpoints; i++)
{
mips32->inst_break_list[i].reg_address = EJTAG_IBA1 + (0x100 * i);
}
/* clear IBIS reg */
if ((retval = target_write_u32(target, EJTAG_IBS, 0)) != ERROR_OK)
return retval;
}
if (dcr & EJTAG_DCR_DB)
{
/* get number of data breakpoints */
if ((retval = target_read_u32(target, EJTAG_DBS, &bpinfo)) != ERROR_OK)
return retval;
mips32->num_data_bpoints = (bpinfo >> 24) & 0x0F;
mips32->num_data_bpoints_avail = mips32->num_data_bpoints;
mips32->data_break_list = calloc(mips32->num_data_bpoints, sizeof(struct mips32_comparator));
for (i = 0; i < mips32->num_data_bpoints; i++)
{
mips32->data_break_list[i].reg_address = EJTAG_DBA1 + (0x100 * i);
}
/* clear DBIS reg */
if ((retval = target_write_u32(target, EJTAG_DBS, 0)) != ERROR_OK)
return retval;
}
/* check if target endianness settings matches debug control register */
if ( ( (dcr & EJTAG_DCR_ENM) && (target->endianness == TARGET_LITTLE_ENDIAN) ) ||
( !(dcr & EJTAG_DCR_ENM) && (target->endianness == TARGET_BIG_ENDIAN) ) )
{
LOG_WARNING("DCR endianness settings does not match target settings");
}
LOG_DEBUG("DCR 0x%" PRIx32 " numinst %i numdata %i", dcr, mips32->num_inst_bpoints,
mips32->num_data_bpoints);
mips32->bp_scanned = 1;
return ERROR_OK;
}
int mips32_run_algorithm(struct target *target, int num_mem_params,
struct mem_param *mem_params, int num_reg_params,
struct reg_param *reg_params, uint32_t entry_point,
uint32_t exit_point, int timeout_ms, void *arch_info)
{
struct mips32_common *mips32 = target_to_mips32(target);
struct mips32_algorithm *mips32_algorithm_info = arch_info;
enum mips32_isa_mode isa_mode = mips32->isa_mode;
uint32_t context[MIPS32NUMCOREREGS];
int i;
int retval = ERROR_OK;
LOG_DEBUG("Running algorithm");
/* NOTE: mips32_run_algorithm requires that each algorithm uses a software breakpoint
* at the exit point */
if (mips32->common_magic != MIPS32_COMMON_MAGIC)
{
LOG_ERROR("current target isn't a MIPS32 target");
return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* refresh core register cache */
for (i = 0; i < MIPS32NUMCOREREGS; i++)
{
if (!mips32->core_cache->reg_list[i].valid)
mips32->read_core_reg(target, i);
context[i] = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32);
}
for (i = 0; i < num_mem_params; i++)
{
if ((retval = target_write_buffer(target, mem_params[i].address,
mem_params[i].size, mem_params[i].value)) != ERROR_OK)
{
return retval;
}
}
for (i = 0; i < num_reg_params; i++)
{
struct reg *reg = register_get_by_name(mips32->core_cache, reg_params[i].reg_name, 0);
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
reg_params[i].reg_name);
return ERROR_COMMAND_SYNTAX_ERROR;
}
mips32_set_core_reg(reg, reg_params[i].value);
}
mips32->isa_mode = mips32_algorithm_info->isa_mode;
retval = mips32_run_and_wait(target, entry_point, timeout_ms, exit_point, mips32);
if (retval != ERROR_OK)
return retval;
for (i = 0; i < num_mem_params; i++)
{
if (mem_params[i].direction != PARAM_OUT)
{
if ((retval = target_read_buffer(target, mem_params[i].address, mem_params[i].size,
mem_params[i].value)) != ERROR_OK)
{
return retval;
}
}
}
for (i = 0; i < num_reg_params; i++)
{
if (reg_params[i].direction != PARAM_OUT)
{
struct reg *reg = register_get_by_name(mips32->core_cache, reg_params[i].reg_name, 0);
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
reg_params[i].reg_name);
return ERROR_COMMAND_SYNTAX_ERROR;
}
buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
}
}
/* restore everything we saved before */
for (i = 0; i < MIPS32NUMCOREREGS; i++)
{
uint32_t regvalue;
regvalue = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32);
if (regvalue != context[i])
{
LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32,
mips32->core_cache->reg_list[i].name, context[i]);
buf_set_u32(mips32->core_cache->reg_list[i].value,
0, 32, context[i]);
mips32->core_cache->reg_list[i].valid = 1;
mips32->core_cache->reg_list[i].dirty = 1;
}
}
mips32->isa_mode = isa_mode;
return ERROR_OK;
}
struct reg_cache *mips32_build_reg_cache(struct target *target)
{
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int num_regs = MIPS32_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 mips32_core_reg *arch_info = malloc(sizeof(struct mips32_core_reg) * num_regs);
struct reg_feature *feature;
int i;
/* Build the process context cache */
cache->name = "mips32 registers";
cache->next = NULL;
cache->reg_list = reg_list;
cache->num_regs = num_regs;
(*cache_p) = cache;
mips32->core_cache = cache;
for (i = 0; i < num_regs; i++) {
arch_info[i].num = mips32_regs[i].id;
arch_info[i].target = target;
arch_info[i].mips32_common = mips32;
reg_list[i].name = mips32_regs[i].name;
reg_list[i].size = 32;
if (mips32_regs[i].flag == MIPS32_GDB_DUMMY_FP_REG) {
reg_list[i].value = mips32_gdb_dummy_fp_value;
reg_list[i].valid = 1;
reg_list[i].arch_info = NULL;
register_init_dummy(®_list[i]);
} else {
reg_list[i].value = calloc(1, 4);
reg_list[i].valid = 0;
reg_list[i].type = &mips32_reg_type;
reg_list[i].arch_info = &arch_info[i];
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 = mips32_regs[i].type;
else
LOG_ERROR("unable to allocate reg type list");
}
reg_list[i].dirty = 0;
reg_list[i].group = mips32_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 = mips32_regs[i].feature;
reg_list[i].feature = feature;
} else
LOG_ERROR("unable to allocate feature list");
}
return cache;
}
