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target/loongarch: Add timer related instructions support.

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This includes:
-RDTIME{L/H}.W
-RDTIME.D

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-30-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Xiaojuan Yang 2022-06-06 20:43:19 +08:00 • committed by Richard Henderson
parent d2cba6f7ce
commit f9bf50745f
6 changed files with 56 additions and 0 deletions
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13
target/loongarch/op_helper.c
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@ -84,6 +84,19 @@ target_ulong helper_cpucfg(CPULoongArchState *env, target_ulong rj)
return rj > 21 ? 0 : env->cpucfg[rj];
}
uint64_t helper_rdtime_d(CPULoongArchState *env)
{
uint64_t plv;
LoongArchCPU *cpu = env_archcpu(env);
plv = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
if (extract64(env->CSR_MISC, R_CSR_MISC_DRDTL_SHIFT + plv, 1)) {
do_raise_exception(env, EXCCODE_IPE, GETPC());
}
return cpu_loongarch_get_constant_timer_counter(cpu);
}
void helper_ertn(CPULoongArchState *env)
{
uint64_t csr_pplv, csr_pie;