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target/riscv: do not check tdata1 readback when trigger is disabled 

when trigger is disabled - there is no point in reading the value back

Signed-off-by: Parshintsev Anatoly <anatoly.parshintsev@syntacore.com>
This commit is contained in:
Parshintsev Anatoly 2024-09-02 20:50:33 +03:00
parent c0f689d1a4
commit 567b3d6531
1 changed files with 14 additions and 4 deletions
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18
src/target/riscv/riscv.c
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@ -669,6 +669,19 @@ static int stdtrig_set_tx_impl(struct target *target, unsigned int idx,
return ERROR_OK;
}
static int sdtrig_disable_trigger(struct target *target, unsigned int idx)
{
// Select which trigger to use
if (riscv_reg_set(target, GDB_REGNO_TSELECT, idx) != ERROR_OK)
return ERROR_FAIL;
// Disable the trigger by writing 0 to it
if (riscv_reg_set(target, GDB_REGNO_TDATA1, 0) != ERROR_OK)
return ERROR_FAIL;
return ERROR_OK;
}
static int sdtrig_set_t1(struct target *target, unsigned int idx,
riscv_reg_t tdata1, riscv_reg_t tdata1_ignore_mask)
{
@ -897,10 +910,7 @@ static int try_setup_chained_match_triggers(struct target *target,
return ERROR_OK;
}
/* Undo the setting of the previous trigger */
// BUG: fixme. once tdata1 is written with zero
// we should not readback tdata1
int ret_undo = sdtrig_set_t1t2(target, idx,
/* tdata1 */ 0, /* tdata2 */0, /* tdata1_mask */ 0);
int ret_undo = sdtrig_disable_trigger(target, idx);
if (ret_undo != ERROR_OK)
return ret_undo;