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/*
* Copyright (C) 2010 Parallel Processing Institute (PPI), Fudan Univ.
* <http://ppi.fudan.edu.cn/system_research_group>
*
* Authors:
* Zhaoguo Wang <zgwang@fudan.edu.cn>
* Yufei Chen <chenyufei@fudan.edu.cn>
* Ran Liu <naruilone@gmail.com>
*
* 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/>.
*/
/* We include this file in op_helper.c */
#include <stdlib.h>
#include <pthread.h>
#include "coremu-atomic.h"
__thread uint64_t cm_exclusive_val;
__thread uint32_t cm_exclusive_addr = -1;
#define GEN_LOAD_EXCLUSIVE(type, TYPE) \
void HELPER(load_exclusive##type)(CPUArchState *env, uint32_t reg, \
uint32_t addr) \
{ \
unsigned long q_addr = 0; \
DATA_##type val = 0; \
\
cm_exclusive_addr = addr; \
CM_GET_QEMU_ADDR(env, q_addr,addr); \
val = *(DATA_##type *)q_addr; \
cm_exclusive_val = val; \
env->regs[reg] = val; \
}
GEN_LOAD_EXCLUSIVE(b, B);
GEN_LOAD_EXCLUSIVE(w, W);
GEN_LOAD_EXCLUSIVE(l, L);
//GEN_LOAD_EXCLUSIVE(q, Q);
#define GEN_STORE_EXCLUSIVE(type, TYPE) \
void HELPER(store_exclusive##type)(CPUArchState *env, uint32_t res, \
uint32_t reg, uint32_t addr) \
{ \
unsigned long q_addr = 0; \
DATA_##type val = 0; \
DATA_##type r = 0; \
\
if(addr != cm_exclusive_addr) \
goto fail; \
\
CM_GET_QEMU_ADDR(env, q_addr,addr); \
val = (DATA_##type)env->regs[reg]; \
\
r = atomic_compare_exchange##type((DATA_##type *)q_addr, \
(DATA_##type)cm_exclusive_val, val); \
\
if(r == (DATA_##type)cm_exclusive_val) { \
env->regs[res] = 0; \
goto done; \
} else { \
goto fail; \
} \
\
fail: \
env->regs[res] = 1; \
\
done: \
cm_exclusive_addr = -1; \
return; \
}
GEN_STORE_EXCLUSIVE(b, B);
GEN_STORE_EXCLUSIVE(w, W);
GEN_STORE_EXCLUSIVE(l, L);
//GEN_STORE_EXCLUSIVE(q, Q);
void HELPER(load_exclusiveq)(CPUArchState *env, uint32_t reg, uint32_t addr)
{
unsigned long q_addr = 0;
uint64_t val = 0;
cm_exclusive_addr = addr;
CM_GET_QEMU_ADDR(env, q_addr,addr);
val = *(uint64_t *)q_addr;
cm_exclusive_val = val;
env->regs[reg] = (uint32_t)val;
env->regs[reg + 1] = (uint32_t)(val>>32);
}
void HELPER(store_exclusiveq)(CPUArchState *env, uint32_t res, uint32_t reg, uint32_t addr)
{
unsigned long q_addr = 0;
uint64_t val = 0;
uint64_t r = 0;
if(addr != cm_exclusive_addr)
goto fail;
CM_GET_QEMU_ADDR(env, q_addr,addr);
val = (uint32_t)env->regs[reg];
val |= ((uint64_t)env->regs[reg + 1]) << 32;
r = atomic_compare_exchangeq((uint64_t *)q_addr,
(uint64_t)cm_exclusive_val, val);
if(r == (uint64_t)cm_exclusive_val) {
env->regs[res] = 0;
goto done;
} else {
goto fail;
}
fail:
env->regs[res] = 1;
done:
cm_exclusive_addr = -1;
return;
}
void HELPER(clear_exclusive)(CPUArchState *env)
{
cm_exclusive_addr = -1;
}
void HELPER(swpb)(CPUArchState *env, uint32_t dst, uint32_t src, uint32_t addr)
{
uint8_t old, val;
unsigned long q_addr;
CM_GET_QEMU_ADDR(env, q_addr,env->regs[addr]);
val = (uint8_t)env->regs[src];
old = atomic_exchangeb((uint8_t *)q_addr, (uint8_t)val);
env->regs[dst] = old;
//printf("SWPB\n");
}
void HELPER(swp)(CPUArchState *env, uint32_t dst, uint32_t src, uint32_t addr)
{
uint32_t old, val;
unsigned long q_addr;
CM_GET_QEMU_ADDR(env, q_addr,env->regs[addr]);
val = env->regs[src];
old = atomic_exchangel((uint32_t *)q_addr, val);
env->regs[dst] = old;
//printf("SWP\n");
}
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