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/*
* x86 memory access helpers
*
* Copyright (c) 2003 Fabrice Bellard
*
* 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 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 "cpu.h"
#include "dyngen-exec.h"
#include "helper.h"
#if !defined(CONFIG_USER_ONLY)
#include "softmmu_exec.h"
#endif /* !defined(CONFIG_USER_ONLY) */
/* broken thread support */
static spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
void helper_lock(void)
{
spin_lock(&global_cpu_lock);
}
void helper_unlock(void)
{
spin_unlock(&global_cpu_lock);
}
void helper_cmpxchg8b(target_ulong a0)
{
uint64_t d;
int eflags;
eflags = helper_cc_compute_all(CC_OP);
d = ldq(a0);
if (d == (((uint64_t)EDX << 32) | (uint32_t)EAX)) {
stq(a0, ((uint64_t)ECX << 32) | (uint32_t)EBX);
eflags |= CC_Z;
} else {
/* always do the store */
stq(a0, d);
EDX = (uint32_t)(d >> 32);
EAX = (uint32_t)d;
eflags &= ~CC_Z;
}
CC_SRC = eflags;
}
#ifdef TARGET_X86_64
void helper_cmpxchg16b(target_ulong a0)
{
uint64_t d0, d1;
int eflags;
if ((a0 & 0xf) != 0) {
raise_exception(env, EXCP0D_GPF);
}
eflags = helper_cc_compute_all(CC_OP);
d0 = ldq(a0);
d1 = ldq(a0 + 8);
if (d0 == EAX && d1 == EDX) {
stq(a0, EBX);
stq(a0 + 8, ECX);
eflags |= CC_Z;
} else {
/* always do the store */
stq(a0, d0);
stq(a0 + 8, d1);
EDX = d1;
EAX = d0;
eflags &= ~CC_Z;
}
CC_SRC = eflags;
}
#endif
void helper_boundw(target_ulong a0, int v)
{
int low, high;
low = ldsw(a0);
high = ldsw(a0 + 2);
v = (int16_t)v;
if (v < low || v > high) {
raise_exception(env, EXCP05_BOUND);
}
}
void helper_boundl(target_ulong a0, int v)
{
int low, high;
low = ldl(a0);
high = ldl(a0 + 4);
if (v < low || v > high) {
raise_exception(env, EXCP05_BOUND);
}
}
#if !defined(CONFIG_USER_ONLY)
#define MMUSUFFIX _mmu
#define SHIFT 0
#include "softmmu_template.h"
#define SHIFT 1
#include "softmmu_template.h"
#define SHIFT 2
#include "softmmu_template.h"
#define SHIFT 3
#include "softmmu_template.h"
#endif
#if !defined(CONFIG_USER_ONLY)
/* try to fill the TLB and return an exception if error. If retaddr is
NULL, it means that the function was called in C code (i.e. not
from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill(CPUX86State *env1, target_ulong addr, int is_write, int mmu_idx,
uintptr_t retaddr)
{
TranslationBlock *tb;
int ret;
CPUX86State *saved_env;
saved_env = env;
env = env1;
ret = cpu_x86_handle_mmu_fault(env, addr, is_write, mmu_idx);
if (ret) {
if (retaddr) {
/* now we have a real cpu fault */
tb = tb_find_pc(retaddr);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, retaddr);
}
}
raise_exception_err(env, env->exception_index, env->error_code);
}
env = saved_env;
}
#endif
/* temporary wrappers */
#if defined(CONFIG_USER_ONLY)
#define ldub_data(addr) ldub_raw(addr)
#define lduw_data(addr) lduw_raw(addr)
#define ldl_data(addr) ldl_raw(addr)
#define ldq_data(addr) ldq_raw(addr)
#define stb_data(addr, data) stb_raw(addr, data)
#define stw_data(addr, data) stw_raw(addr, data)
#define stl_data(addr, data) stl_raw(addr, data)
#define stq_data(addr, data) stq_raw(addr, data)
#endif
#define WRAP_LD(rettype, fn) \
rettype cpu_ ## fn(CPUX86State *env1, target_ulong addr) \
{ \
CPUX86State *saved_env; \
rettype ret; \
\
saved_env = env; \
env = env1; \
ret = fn(addr); \
env = saved_env; \
return ret; \
}
WRAP_LD(uint32_t, ldub_data)
WRAP_LD(uint32_t, lduw_data)
WRAP_LD(uint32_t, ldl_data)
WRAP_LD(uint64_t, ldq_data)
#undef WRAP_LD
#define WRAP_ST(datatype, fn) \
void cpu_ ## fn(CPUX86State *env1, target_ulong addr, datatype val) \
{ \
CPUX86State *saved_env; \
\
saved_env = env; \
env = env1; \
fn(addr, val); \
env = saved_env; \
}
WRAP_ST(uint32_t, stb_data)
WRAP_ST(uint32_t, stw_data)
WRAP_ST(uint32_t, stl_data)
WRAP_ST(uint64_t, stq_data)
#undef WRAP_ST
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