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target/riscv: Add Zc extension implied rule 

Zc extension has special implied rules that need to be handled separately.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Jerry Zhang Jian <jerry.zhangjian@sifive.com>
Tested-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20240625114629.27793-6-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2024-06-25 19:46:28 +08:00 committed by Alistair Francis
parent 340c3ca5f2
commit 3dd2168c33
1 changed files with 34 additions and 0 deletions
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34
target/riscv/tcg/tcg-cpu.c
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@ -925,11 +925,45 @@ static void cpu_enable_implied_rule(RISCVCPU *cpu,
}
}
/* Zc extension has special implied rules that need to be handled separately. */
static void cpu_enable_zc_implied_rules(RISCVCPU *cpu)
{
RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
CPURISCVState *env = &cpu->env;
if (cpu->cfg.ext_zce) {
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zca), true);
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcb), true);
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcmp), true);
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcmt), true);
if (riscv_has_ext(env, RVF) && mcc->misa_mxl_max == MXL_RV32) {
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcf), true);
}
}
/* Zca, Zcd and Zcf has a PRIV 1.12.0 restriction */
if (riscv_has_ext(env, RVC) && env->priv_ver >= PRIV_VERSION_1_12_0) {
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zca), true);
if (riscv_has_ext(env, RVF) && mcc->misa_mxl_max == MXL_RV32) {
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcf), true);
}
if (riscv_has_ext(env, RVD)) {
cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcd), true);
}
}
}
static void riscv_cpu_enable_implied_rules(RISCVCPU *cpu)
{
RISCVCPUImpliedExtsRule *rule;
int i;
/* Enable the implied extensions for Zc. */
cpu_enable_zc_implied_rules(cpu);
/* Enable the implied MISAs. */
for (i = 0; (rule = riscv_misa_ext_implied_rules[i]); i++) {
if (riscv_has_ext(&cpu->env, rule->ext)) {