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qemu-patch-raspberry4/target/mips/ldst_helper.c
Philippe Mathieu-Daudé 6f4aec6a6d target/mips: Extract load/store helpers to ldst_helper.c 
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-11-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00

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9.1 KiB
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/*
* MIPS emulation load/store helpers for QEMU.
*
* Copyright (c) 2004-2005 Jocelyn Mayer
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/exec-all.h"
#include "exec/memop.h"
#include "internal.h"
#ifndef CONFIG_USER_ONLY
#define HELPER_LD_ATOMIC(name, insn, almask, do_cast) \
target_ulong helper_##name(CPUMIPSState *env, target_ulong arg, int mem_idx) \
{ \
if (arg & almask) { \
if (!(env->hflags & MIPS_HFLAG_DM)) { \
env->CP0_BadVAddr = arg; \
} \
do_raise_exception(env, EXCP_AdEL, GETPC()); \
} \
env->CP0_LLAddr = cpu_mips_translate_address(env, arg, MMU_DATA_LOAD, \
GETPC()); \
env->lladdr = arg; \
env->llval = do_cast cpu_##insn##_mmuidx_ra(env, arg, mem_idx, GETPC()); \
return env->llval; \
}
HELPER_LD_ATOMIC(ll, ldl, 0x3, (target_long)(int32_t))
#ifdef TARGET_MIPS64
HELPER_LD_ATOMIC(lld, ldq, 0x7, (target_ulong))
#endif
#undef HELPER_LD_ATOMIC
#endif /* !CONFIG_USER_ONLY */
#ifdef TARGET_WORDS_BIGENDIAN
#define GET_LMASK(v) ((v) & 3)
#define GET_OFFSET(addr, offset) (addr + (offset))
#else
#define GET_LMASK(v) (((v) & 3) ^ 3)
#define GET_OFFSET(addr, offset) (addr - (offset))
#endif
void helper_swl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)(arg1 >> 24), mem_idx, GETPC());
if (GET_LMASK(arg2) <= 2) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 1), (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
if (GET_LMASK(arg2) <= 1) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 2), (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
if (GET_LMASK(arg2) == 0) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 3), (uint8_t)arg1,
mem_idx, GETPC());
}
}
void helper_swr(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)arg1, mem_idx, GETPC());
if (GET_LMASK(arg2) >= 1) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -1), (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
if (GET_LMASK(arg2) >= 2) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -2), (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
if (GET_LMASK(arg2) == 3) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -3), (uint8_t)(arg1 >> 24),
mem_idx, GETPC());
}
}
#if defined(TARGET_MIPS64)
/*
* "half" load and stores. We must do the memory access inline,
* or fault handling won't work.
*/
#ifdef TARGET_WORDS_BIGENDIAN
#define GET_LMASK64(v) ((v) & 7)
#else
#define GET_LMASK64(v) (((v) & 7) ^ 7)
#endif
void helper_sdl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)(arg1 >> 56), mem_idx, GETPC());
if (GET_LMASK64(arg2) <= 6) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 1), (uint8_t)(arg1 >> 48),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 5) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 2), (uint8_t)(arg1 >> 40),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 4) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 3), (uint8_t)(arg1 >> 32),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 3) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 4), (uint8_t)(arg1 >> 24),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 2) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 5), (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 1) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 6), (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) <= 0) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 7), (uint8_t)arg1,
mem_idx, GETPC());
}
}
void helper_sdr(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)arg1, mem_idx, GETPC());
if (GET_LMASK64(arg2) >= 1) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -1), (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) >= 2) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -2), (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) >= 3) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -3), (uint8_t)(arg1 >> 24),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) >= 4) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -4), (uint8_t)(arg1 >> 32),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) >= 5) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -5), (uint8_t)(arg1 >> 40),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) >= 6) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -6), (uint8_t)(arg1 >> 48),
mem_idx, GETPC());
}
if (GET_LMASK64(arg2) == 7) {
cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -7), (uint8_t)(arg1 >> 56),
mem_idx, GETPC());
}
}
#endif /* TARGET_MIPS64 */
static const int multiple_regs[] = { 16, 17, 18, 19, 20, 21, 22, 23, 30 };
void helper_lwm(CPUMIPSState *env, target_ulong addr, target_ulong reglist,
uint32_t mem_idx)
{
target_ulong base_reglist = reglist & 0xf;
target_ulong do_r31 = reglist & 0x10;
if (base_reglist > 0 && base_reglist <= ARRAY_SIZE(multiple_regs)) {
target_ulong i;
for (i = 0; i < base_reglist; i++) {
env->active_tc.gpr[multiple_regs[i]] =
(target_long)cpu_ldl_mmuidx_ra(env, addr, mem_idx, GETPC());
addr += 4;
}
}
if (do_r31) {
env->active_tc.gpr[31] =
(target_long)cpu_ldl_mmuidx_ra(env, addr, mem_idx, GETPC());
}
}
void helper_swm(CPUMIPSState *env, target_ulong addr, target_ulong reglist,
uint32_t mem_idx)
{
target_ulong base_reglist = reglist & 0xf;
target_ulong do_r31 = reglist & 0x10;
if (base_reglist > 0 && base_reglist <= ARRAY_SIZE(multiple_regs)) {
target_ulong i;
for (i = 0; i < base_reglist; i++) {
cpu_stw_mmuidx_ra(env, addr, env->active_tc.gpr[multiple_regs[i]],
mem_idx, GETPC());
addr += 4;
}
}
if (do_r31) {
cpu_stw_mmuidx_ra(env, addr, env->active_tc.gpr[31], mem_idx, GETPC());
}
}
#if defined(TARGET_MIPS64)
void helper_ldm(CPUMIPSState *env, target_ulong addr, target_ulong reglist,
uint32_t mem_idx)
{
target_ulong base_reglist = reglist & 0xf;
target_ulong do_r31 = reglist & 0x10;
if (base_reglist > 0 && base_reglist <= ARRAY_SIZE(multiple_regs)) {
target_ulong i;
for (i = 0; i < base_reglist; i++) {
env->active_tc.gpr[multiple_regs[i]] =
cpu_ldq_mmuidx_ra(env, addr, mem_idx, GETPC());
addr += 8;
}
}
if (do_r31) {
env->active_tc.gpr[31] =
cpu_ldq_mmuidx_ra(env, addr, mem_idx, GETPC());
}
}
void helper_sdm(CPUMIPSState *env, target_ulong addr, target_ulong reglist,
uint32_t mem_idx)
{
target_ulong base_reglist = reglist & 0xf;
target_ulong do_r31 = reglist & 0x10;
if (base_reglist > 0 && base_reglist <= ARRAY_SIZE(multiple_regs)) {
target_ulong i;
for (i = 0; i < base_reglist; i++) {
cpu_stq_mmuidx_ra(env, addr, env->active_tc.gpr[multiple_regs[i]],
mem_idx, GETPC());
addr += 8;
}
}
if (do_r31) {
cpu_stq_mmuidx_ra(env, addr, env->active_tc.gpr[31], mem_idx, GETPC());
}
}
#endif /* TARGET_MIPS64 */
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