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[PATCH v1 2/5] target/riscv: Use the RiscVException enum for CSR predica
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From: |
Alistair Francis |
|
Subject: |
[PATCH v1 2/5] target/riscv: Use the RiscVException enum for CSR predicates |
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Date: |
Wed, 17 Mar 2021 13:39:52 -0400 |
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/cpu.h | 3 +-
target/riscv/csr.c | 80 +++++++++++++++++++++++++---------------------
2 files changed, 46 insertions(+), 37 deletions(-)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 0edb2826a2..073a994d13 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -469,7 +469,8 @@ static inline target_ulong riscv_csr_read(CPURISCVState
*env, int csrno)
return val;
}
-typedef int (*riscv_csr_predicate_fn)(CPURISCVState *env, int csrno);
+typedef RiscVException (*riscv_csr_predicate_fn)(CPURISCVState *env,
+ int csrno);
typedef int (*riscv_csr_read_fn)(CPURISCVState *env, int csrno,
target_ulong *ret_value);
typedef int (*riscv_csr_write_fn)(CPURISCVState *env, int csrno,
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index fd2e6363f3..da9baff6fb 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -35,29 +35,29 @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops)
}
/* Predicates */
-static int fs(CPURISCVState *env, int csrno)
+static RiscVException fs(CPURISCVState *env, int csrno)
{
#if !defined(CONFIG_USER_ONLY)
/* loose check condition for fcsr in vector extension */
if ((csrno == CSR_FCSR) && (env->misa & RVV)) {
- return 0;
+ return RISCV_EXCP_INST_ACCESS_FAULT;
}
if (!env->debugger && !riscv_cpu_fp_enabled(env)) {
- return -RISCV_EXCP_ILLEGAL_INST;
+ return RISCV_EXCP_ILLEGAL_INST;
}
#endif
- return 0;
+ return RISCV_EXCP_NONE;
}
-static int vs(CPURISCVState *env, int csrno)
+static RiscVException vs(CPURISCVState *env, int csrno)
{
if (env->misa & RVV) {
- return 0;
+ return RISCV_EXCP_NONE;
}
- return -1;
+ return RISCV_EXCP_INST_ACCESS_FAULT;
}
-static int ctr(CPURISCVState *env, int csrno)
+static RiscVException ctr(CPURISCVState *env, int csrno)
{
#if !defined(CONFIG_USER_ONLY)
CPUState *cs = env_cpu(env);
@@ -65,7 +65,7 @@ static int ctr(CPURISCVState *env, int csrno)
if (!cpu->cfg.ext_counters) {
/* The Counters extensions is not enabled */
- return -RISCV_EXCP_ILLEGAL_INST;
+ return RISCV_EXCP_ILLEGAL_INST;
}
if (riscv_cpu_virt_enabled(env)) {
@@ -73,25 +73,25 @@ static int ctr(CPURISCVState *env, int csrno)
case CSR_CYCLE:
if (!get_field(env->hcounteren, HCOUNTEREN_CY) &&
get_field(env->mcounteren, HCOUNTEREN_CY)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_TIME:
if (!get_field(env->hcounteren, HCOUNTEREN_TM) &&
get_field(env->mcounteren, HCOUNTEREN_TM)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_INSTRET:
if (!get_field(env->hcounteren, HCOUNTEREN_IR) &&
get_field(env->mcounteren, HCOUNTEREN_IR)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_HPMCOUNTER3...CSR_HPMCOUNTER31:
if (!get_field(env->hcounteren, 1 << (csrno - CSR_HPMCOUNTER3)) &&
get_field(env->mcounteren, 1 << (csrno - CSR_HPMCOUNTER3))) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
}
@@ -100,93 +100,101 @@ static int ctr(CPURISCVState *env, int csrno)
case CSR_CYCLEH:
if (!get_field(env->hcounteren, HCOUNTEREN_CY) &&
get_field(env->mcounteren, HCOUNTEREN_CY)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_TIMEH:
if (!get_field(env->hcounteren, HCOUNTEREN_TM) &&
get_field(env->mcounteren, HCOUNTEREN_TM)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_INSTRETH:
if (!get_field(env->hcounteren, HCOUNTEREN_IR) &&
get_field(env->mcounteren, HCOUNTEREN_IR)) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
case CSR_HPMCOUNTER3H...CSR_HPMCOUNTER31H:
if (!get_field(env->hcounteren, 1 << (csrno -
CSR_HPMCOUNTER3H)) &&
get_field(env->mcounteren, 1 << (csrno -
CSR_HPMCOUNTER3H))) {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
break;
}
}
}
#endif
- return 0;
+ return RISCV_EXCP_NONE;
}
-static int ctr32(CPURISCVState *env, int csrno)
+static RiscVException ctr32(CPURISCVState *env, int csrno)
{
if (!riscv_cpu_is_32bit(env)) {
- return -RISCV_EXCP_ILLEGAL_INST;
+ return RISCV_EXCP_ILLEGAL_INST;
}
return ctr(env, csrno);
}
#if !defined(CONFIG_USER_ONLY)
-static int any(CPURISCVState *env, int csrno)
+static RiscVException any(CPURISCVState *env, int csrno)
{
- return 0;
+ return RISCV_EXCP_NONE;
}
-static int any32(CPURISCVState *env, int csrno)
+static RiscVException any32(CPURISCVState *env, int csrno)
{
if (!riscv_cpu_is_32bit(env)) {
- return -RISCV_EXCP_ILLEGAL_INST;
+ return RISCV_EXCP_ILLEGAL_INST;
}
return any(env, csrno);
}
-static int smode(CPURISCVState *env, int csrno)
+static RiscVException smode(CPURISCVState *env, int csrno)
{
- return -!riscv_has_ext(env, RVS);
+ if (riscv_has_ext(env, RVS)) {
+ return RISCV_EXCP_NONE;
+ }
+
+ return RISCV_EXCP_ILLEGAL_INST;
}
-static int hmode(CPURISCVState *env, int csrno)
+static RiscVException hmode(CPURISCVState *env, int csrno)
{
if (riscv_has_ext(env, RVS) &&
riscv_has_ext(env, RVH)) {
/* Hypervisor extension is supported */
if ((env->priv == PRV_S && !riscv_cpu_virt_enabled(env)) ||
env->priv == PRV_M) {
- return 0;
+ return RISCV_EXCP_NONE;
} else {
- return -RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
+ return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
}
}
- return -RISCV_EXCP_ILLEGAL_INST;
+ return RISCV_EXCP_ILLEGAL_INST;
}
-static int hmode32(CPURISCVState *env, int csrno)
+static RiscVException hmode32(CPURISCVState *env, int csrno)
{
if (!riscv_cpu_is_32bit(env)) {
- return 0;
+ return RISCV_EXCP_NONE;
}
return hmode(env, csrno);
}
-static int pmp(CPURISCVState *env, int csrno)
+static RiscVException pmp(CPURISCVState *env, int csrno)
{
- return -!riscv_feature(env, RISCV_FEATURE_PMP);
+ if (riscv_feature(env, RISCV_FEATURE_PMP)) {
+ return RISCV_EXCP_NONE;
+ }
+
+ return RISCV_EXCP_ILLEGAL_INST;
}
#endif
@@ -1312,8 +1320,8 @@ int riscv_csrrw(CPURISCVState *env, int csrno,
target_ulong *ret_value,
return -RISCV_EXCP_ILLEGAL_INST;
}
ret = csr_ops[csrno].predicate(env, csrno);
- if (ret < 0) {
- return ret;
+ if (ret > 0) {
+ return -ret;
}
/* execute combined read/write operation if it exists */
--
2.30.1