mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-26 21:10:42 +00:00
064357041d
The boundary size of cpucfg array should be 0 to ARRAY_SIZE(cpucfg)-1. So, using index bigger than max boundary to access cpucfg[] must be forbidden. Fix coverity CID: 1489760 Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220715060740.1500628-6-yangxiaojuan@loongson.cn> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* LoongArch emulation helpers for QEMU.
|
|
*
|
|
* Copyright (c) 2021 Loongson Technology Corporation Limited
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/log.h"
|
|
#include "qemu/main-loop.h"
|
|
#include "cpu.h"
|
|
#include "qemu/host-utils.h"
|
|
#include "exec/helper-proto.h"
|
|
#include "exec/exec-all.h"
|
|
#include "exec/cpu_ldst.h"
|
|
#include "internals.h"
|
|
#include "qemu/crc32c.h"
|
|
#include <zlib.h>
|
|
#include "cpu-csr.h"
|
|
|
|
/* Exceptions helpers */
|
|
void helper_raise_exception(CPULoongArchState *env, uint32_t exception)
|
|
{
|
|
do_raise_exception(env, exception, GETPC());
|
|
}
|
|
|
|
target_ulong helper_bitrev_w(target_ulong rj)
|
|
{
|
|
return (int32_t)revbit32(rj);
|
|
}
|
|
|
|
target_ulong helper_bitrev_d(target_ulong rj)
|
|
{
|
|
return revbit64(rj);
|
|
}
|
|
|
|
target_ulong helper_bitswap(target_ulong v)
|
|
{
|
|
v = ((v >> 1) & (target_ulong)0x5555555555555555ULL) |
|
|
((v & (target_ulong)0x5555555555555555ULL) << 1);
|
|
v = ((v >> 2) & (target_ulong)0x3333333333333333ULL) |
|
|
((v & (target_ulong)0x3333333333333333ULL) << 2);
|
|
v = ((v >> 4) & (target_ulong)0x0F0F0F0F0F0F0F0FULL) |
|
|
((v & (target_ulong)0x0F0F0F0F0F0F0F0FULL) << 4);
|
|
return v;
|
|
}
|
|
|
|
/* loongarch assert op */
|
|
void helper_asrtle_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
|
|
{
|
|
if (rj > rk) {
|
|
do_raise_exception(env, EXCCODE_BCE, 0);
|
|
}
|
|
}
|
|
|
|
void helper_asrtgt_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
|
|
{
|
|
if (rj <= rk) {
|
|
do_raise_exception(env, EXCCODE_BCE, 0);
|
|
}
|
|
}
|
|
|
|
target_ulong helper_crc32(target_ulong val, target_ulong m, uint64_t sz)
|
|
{
|
|
uint8_t buf[8];
|
|
target_ulong mask = ((sz * 8) == 64) ? -1ULL : ((1ULL << (sz * 8)) - 1);
|
|
|
|
m &= mask;
|
|
stq_le_p(buf, m);
|
|
return (int32_t) (crc32(val ^ 0xffffffff, buf, sz) ^ 0xffffffff);
|
|
}
|
|
|
|
target_ulong helper_crc32c(target_ulong val, target_ulong m, uint64_t sz)
|
|
{
|
|
uint8_t buf[8];
|
|
target_ulong mask = ((sz * 8) == 64) ? -1ULL : ((1ULL << (sz * 8)) - 1);
|
|
m &= mask;
|
|
stq_le_p(buf, m);
|
|
return (int32_t) (crc32c(val, buf, sz) ^ 0xffffffff);
|
|
}
|
|
|
|
target_ulong helper_cpucfg(CPULoongArchState *env, target_ulong rj)
|
|
{
|
|
return rj >= ARRAY_SIZE(env->cpucfg) ? 0 : env->cpucfg[rj];
|
|
}
|
|
|
|
uint64_t helper_rdtime_d(CPULoongArchState *env)
|
|
{
|
|
#ifdef CONFIG_USER_ONLY
|
|
return cpu_get_host_ticks();
|
|
#else
|
|
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);
|
|
#endif
|
|
}
|
|
|
|
#ifndef CONFIG_USER_ONLY
|
|
void helper_ertn(CPULoongArchState *env)
|
|
{
|
|
uint64_t csr_pplv, csr_pie;
|
|
if (FIELD_EX64(env->CSR_TLBRERA, CSR_TLBRERA, ISTLBR)) {
|
|
csr_pplv = FIELD_EX64(env->CSR_TLBRPRMD, CSR_TLBRPRMD, PPLV);
|
|
csr_pie = FIELD_EX64(env->CSR_TLBRPRMD, CSR_TLBRPRMD, PIE);
|
|
|
|
env->CSR_TLBRERA = FIELD_DP64(env->CSR_TLBRERA, CSR_TLBRERA, ISTLBR, 0);
|
|
env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, DA, 0);
|
|
env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PG, 1);
|
|
env->pc = env->CSR_TLBRERA;
|
|
qemu_log_mask(CPU_LOG_INT, "%s: TLBRERA " TARGET_FMT_lx "\n",
|
|
__func__, env->CSR_TLBRERA);
|
|
} else {
|
|
csr_pplv = FIELD_EX64(env->CSR_PRMD, CSR_PRMD, PPLV);
|
|
csr_pie = FIELD_EX64(env->CSR_PRMD, CSR_PRMD, PIE);
|
|
|
|
env->pc = env->CSR_ERA;
|
|
qemu_log_mask(CPU_LOG_INT, "%s: ERA " TARGET_FMT_lx "\n",
|
|
__func__, env->CSR_ERA);
|
|
}
|
|
env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PLV, csr_pplv);
|
|
env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, IE, csr_pie);
|
|
|
|
env->lladdr = 1;
|
|
}
|
|
|
|
void helper_idle(CPULoongArchState *env)
|
|
{
|
|
CPUState *cs = env_cpu(env);
|
|
|
|
cs->halted = 1;
|
|
do_raise_exception(env, EXCP_HLT, 0);
|
|
}
|
|
#endif
|