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- add support for hardware breakpoints to mips32 target

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git-svn-id: svn://svn.berlios.de/openocd/trunk@1173 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
ntfreak
2008-11-17 17:56:44 +00:00
parent 76b3c6ece6
commit 5711203e20
5 changed files with 279 additions and 31 deletions
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83
src/target/mips32.c
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@@ -325,6 +325,10 @@ int mips32_init_arch_info(target_t *target, mips32_common_t *mips32, int chain_p
target->arch_info = mips32;
mips32->common_magic = MIPS32_COMMON_MAGIC;
/* has breakpoint/watchpint unit been scanned */
mips32->bp_scanned = 0;
mips32->data_break_list = NULL;
mips32->ejtag_info.chain_pos = chain_pos;
mips32->read_core_reg = mips32_read_core_reg;
mips32->write_core_reg = mips32_write_core_reg;
@@ -342,3 +346,82 @@ int mips32_run_algorithm(struct target_s *target, int num_mem_params, mem_param_
/*TODO*/
return ERROR_OK;
}
int mips32_examine(struct target_s *target)
{
mips32_common_t *mips32 = target->arch_info;
if (!target->type->examined)
{
target->type->examined = 1;
/* 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_s *target)
{
/* get pointers to arch-specific information */
mips32_common_t *mips32 = target->arch_info;
int retval;
u32 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 & (1 << 16))
{
/* 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(mips32_comparator_t));
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 & (1 << 17))
{
/* 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(mips32_comparator_t));
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;
}
LOG_DEBUG("DCR 0x%x numinst %i numdata %i", dcr, mips32->num_inst_bpoints, mips32->num_data_bpoints);
mips32->bp_scanned = 1;
return ERROR_OK;
}