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tinyriscv-openocd
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Only write hartsel if we're changing it. 

DebugBreakpoint went from 2.94s to 2.74s.

Change-Id: Ia3ab857aea89fb83f0bcdd9a6bb69f256bde13dd
riscv-compliance-dev
Tim Newsome 2018-04-09 15:12:51 -07:00
parent 238b1e9f06
commit 1fda89c3ce
1 changed files with 12 additions and 2 deletions
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14
src/target/riscv/riscv-013.c
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@ -144,6 +144,8 @@ typedef struct {
bool was_reset;
/* Targets that are connected to this DM. */
struct list_head target_list;
/* The currently selected hartid on this DM. */
int current_hartid;
} dm013_info_t;
typedef struct {
@ -243,6 +245,7 @@ static dm013_info_t *get_dm(struct target *target)
if (!dm) {
dm = calloc(1, sizeof(dm013_info_t));
dm->abs_chain_position = abs_chain_position;
dm->current_hartid = -1;
INIT_LIST_HEAD(&dm->target_list);
list_add(&dm->list, &dm_list);
}
@ -1137,8 +1140,6 @@ static int register_read(struct target *target, uint64_t *value, uint32_t number
struct reg *reg = &target->reg_cache->reg_list[number];
if (reg && reg->valid) {
*value = buf_get_u64(reg->value, 0, reg->size);
LOG_INFO(">>> cache hit on %s: 0x%" PRIx64,
gdb_regno_name(number), *value);
return ERROR_OK;
}
}
@ -2700,10 +2701,19 @@ static void riscv013_select_current_hart(struct target *target)
{
RISCV_INFO(r);
dm013_info_t *dm = get_dm(target);
if (r->current_hartid == dm->current_hartid) {
LOG_DEBUG(">>> nothing to be done");
return;
}
LOG_DEBUG(">>> change it");
uint32_t dmcontrol;
dmi_read(target, &dmcontrol, DMI_DMCONTROL);
dmcontrol = set_field(dmcontrol, hartsel_mask(target), r->current_hartid);
dmi_write(target, DMI_DMCONTROL, dmcontrol);
dm->current_hartid = r->current_hartid;
}
static int riscv013_halt_current_hart(struct target *target)