mirror of https://gitee.com/openkylin/qemu.git
216 lines
6.1 KiB
C
216 lines
6.1 KiB
C
/*
|
|
* Atomic helper templates
|
|
* Included from tcg-runtime.c and cputlb.c.
|
|
*
|
|
* Copyright (c) 2016 Red Hat, Inc
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#if DATA_SIZE == 16
|
|
# define SUFFIX o
|
|
# define DATA_TYPE Int128
|
|
# define BSWAP bswap128
|
|
#elif DATA_SIZE == 8
|
|
# define SUFFIX q
|
|
# define DATA_TYPE uint64_t
|
|
# define BSWAP bswap64
|
|
#elif DATA_SIZE == 4
|
|
# define SUFFIX l
|
|
# define DATA_TYPE uint32_t
|
|
# define BSWAP bswap32
|
|
#elif DATA_SIZE == 2
|
|
# define SUFFIX w
|
|
# define DATA_TYPE uint16_t
|
|
# define BSWAP bswap16
|
|
#elif DATA_SIZE == 1
|
|
# define SUFFIX b
|
|
# define DATA_TYPE uint8_t
|
|
# define BSWAP
|
|
#else
|
|
# error unsupported data size
|
|
#endif
|
|
|
|
#if DATA_SIZE >= 4
|
|
# define ABI_TYPE DATA_TYPE
|
|
#else
|
|
# define ABI_TYPE uint32_t
|
|
#endif
|
|
|
|
/* Define host-endian atomic operations. Note that END is used within
|
|
the ATOMIC_NAME macro, and redefined below. */
|
|
#if DATA_SIZE == 1
|
|
# define END
|
|
#elif defined(HOST_WORDS_BIGENDIAN)
|
|
# define END _be
|
|
#else
|
|
# define END _le
|
|
#endif
|
|
|
|
ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE cmpv, ABI_TYPE newv EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
return atomic_cmpxchg__nocheck(haddr, cmpv, newv);
|
|
}
|
|
|
|
#if DATA_SIZE >= 16
|
|
ABI_TYPE ATOMIC_NAME(ld)(CPUArchState *env, target_ulong addr EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE val, *haddr = ATOMIC_MMU_LOOKUP;
|
|
__atomic_load(haddr, &val, __ATOMIC_RELAXED);
|
|
return val;
|
|
}
|
|
|
|
void ATOMIC_NAME(st)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
__atomic_store(haddr, &val, __ATOMIC_RELAXED);
|
|
}
|
|
#else
|
|
ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
return atomic_xchg__nocheck(haddr, val);
|
|
}
|
|
|
|
#define GEN_ATOMIC_HELPER(X) \
|
|
ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \
|
|
ABI_TYPE val EXTRA_ARGS) \
|
|
{ \
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP; \
|
|
return atomic_##X(haddr, val); \
|
|
} \
|
|
|
|
GEN_ATOMIC_HELPER(fetch_add)
|
|
GEN_ATOMIC_HELPER(fetch_and)
|
|
GEN_ATOMIC_HELPER(fetch_or)
|
|
GEN_ATOMIC_HELPER(fetch_xor)
|
|
GEN_ATOMIC_HELPER(add_fetch)
|
|
GEN_ATOMIC_HELPER(and_fetch)
|
|
GEN_ATOMIC_HELPER(or_fetch)
|
|
GEN_ATOMIC_HELPER(xor_fetch)
|
|
|
|
#undef GEN_ATOMIC_HELPER
|
|
#endif /* DATA SIZE >= 16 */
|
|
|
|
#undef END
|
|
|
|
#if DATA_SIZE > 1
|
|
|
|
/* Define reverse-host-endian atomic operations. Note that END is used
|
|
within the ATOMIC_NAME macro. */
|
|
#ifdef HOST_WORDS_BIGENDIAN
|
|
# define END _le
|
|
#else
|
|
# define END _be
|
|
#endif
|
|
|
|
ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE cmpv, ABI_TYPE newv EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
return BSWAP(atomic_cmpxchg__nocheck(haddr, BSWAP(cmpv), BSWAP(newv)));
|
|
}
|
|
|
|
#if DATA_SIZE >= 16
|
|
ABI_TYPE ATOMIC_NAME(ld)(CPUArchState *env, target_ulong addr EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE val, *haddr = ATOMIC_MMU_LOOKUP;
|
|
__atomic_load(haddr, &val, __ATOMIC_RELAXED);
|
|
return BSWAP(val);
|
|
}
|
|
|
|
void ATOMIC_NAME(st)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
val = BSWAP(val);
|
|
__atomic_store(haddr, &val, __ATOMIC_RELAXED);
|
|
}
|
|
#else
|
|
ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
return BSWAP(atomic_xchg__nocheck(haddr, BSWAP(val)));
|
|
}
|
|
|
|
#define GEN_ATOMIC_HELPER(X) \
|
|
ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \
|
|
ABI_TYPE val EXTRA_ARGS) \
|
|
{ \
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP; \
|
|
return BSWAP(atomic_##X(haddr, BSWAP(val))); \
|
|
}
|
|
|
|
GEN_ATOMIC_HELPER(fetch_and)
|
|
GEN_ATOMIC_HELPER(fetch_or)
|
|
GEN_ATOMIC_HELPER(fetch_xor)
|
|
GEN_ATOMIC_HELPER(and_fetch)
|
|
GEN_ATOMIC_HELPER(or_fetch)
|
|
GEN_ATOMIC_HELPER(xor_fetch)
|
|
|
|
#undef GEN_ATOMIC_HELPER
|
|
|
|
/* Note that for addition, we need to use a separate cmpxchg loop instead
|
|
of bswaps for the reverse-host-endian helpers. */
|
|
ABI_TYPE ATOMIC_NAME(fetch_add)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
DATA_TYPE ldo, ldn, ret, sto;
|
|
|
|
ldo = atomic_read__nocheck(haddr);
|
|
while (1) {
|
|
ret = BSWAP(ldo);
|
|
sto = BSWAP(ret + val);
|
|
ldn = atomic_cmpxchg__nocheck(haddr, ldo, sto);
|
|
if (ldn == ldo) {
|
|
return ret;
|
|
}
|
|
ldo = ldn;
|
|
}
|
|
}
|
|
|
|
ABI_TYPE ATOMIC_NAME(add_fetch)(CPUArchState *env, target_ulong addr,
|
|
ABI_TYPE val EXTRA_ARGS)
|
|
{
|
|
DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
|
|
DATA_TYPE ldo, ldn, ret, sto;
|
|
|
|
ldo = atomic_read__nocheck(haddr);
|
|
while (1) {
|
|
ret = BSWAP(ldo) + val;
|
|
sto = BSWAP(ret);
|
|
ldn = atomic_cmpxchg__nocheck(haddr, ldo, sto);
|
|
if (ldn == ldo) {
|
|
return ret;
|
|
}
|
|
ldo = ldn;
|
|
}
|
|
}
|
|
#endif /* DATA_SIZE >= 16 */
|
|
|
|
#undef END
|
|
#endif /* DATA_SIZE > 1 */
|
|
|
|
#undef BSWAP
|
|
#undef ABI_TYPE
|
|
#undef DATA_TYPE
|
|
#undef SUFFIX
|
|
#undef DATA_SIZE
|