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target/riscv: avoid unnecessary dcsr.ebreak* update on reset #1154

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target/riscv: avoid unnecessary dcsr.ebreak* update on reset #1154

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8 changes: 7 additions & 1 deletion src/target/riscv/riscv-013.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2837,6 +2837,12 @@ static int assert_reset(struct target *target)
return riscv013_invalidate_cached_progbuf(target);
}

static bool dcsr_ebreak_config_equals_reset_value(const struct target *target)
{
RISCV_INFO(r);
return !(r->riscv_ebreakm || r->riscv_ebreaks || r->riscv_ebreaku);
}

static int deassert_reset(struct target *target)
{
RISCV013_INFO(info);
Expand Down Expand Up @@ -2903,7 +2909,7 @@ static int deassert_reset(struct target *target)
target->state = TARGET_RUNNING;
target->debug_reason = DBG_REASON_NOTHALTED;
}
info->dcsr_ebreak_is_set = false;
info->dcsr_ebreak_is_set = dcsr_ebreak_config_equals_reset_value(target);

/* Ack reset and clear DM_DMCONTROL_HALTREQ if previously set */
control = 0;
Expand Down