/*-
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _MACHINE_ATOMIC_H_
#define _MACHINE_ATOMIC_H_
#include <sys/atomic_common.h>
#define fence() __asm __volatile("fence" ::: "memory");
#define mb() fence()
#define rmb() fence()
#define wmb() fence()
static __inline int atomic_cmpset_8(__volatile uint8_t *, uint8_t, uint8_t);
static __inline int atomic_fcmpset_8(__volatile uint8_t *, uint8_t *, uint8_t);
static __inline int atomic_cmpset_16(__volatile uint16_t *, uint16_t, uint16_t);
static __inline int atomic_fcmpset_16(__volatile uint16_t *, uint16_t *,
uint16_t);
#define ATOMIC_ACQ_REL(NAME, WIDTH) \
static __inline void \
atomic_##NAME##_acq_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
{ \
atomic_##NAME##_##WIDTH(p, v); \
fence(); \
} \
\
static __inline void \
atomic_##NAME##_rel_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
{ \
fence(); \
atomic_##NAME##_##WIDTH(p, v); \
}
#define ATOMIC_CMPSET_ACQ_REL(WIDTH) \
static __inline int \
atomic_cmpset_acq_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t cmpval, uint##WIDTH##_t newval) \
{ \
int retval; \
\
retval = atomic_cmpset_##WIDTH(p, cmpval, newval); \
fence(); \
return (retval); \
} \
\
static __inline int \
atomic_cmpset_rel_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t cmpval, uint##WIDTH##_t newval) \
{ \
fence(); \
return (atomic_cmpset_##WIDTH(p, cmpval, newval)); \
}
#define ATOMIC_FCMPSET_ACQ_REL(WIDTH) \
static __inline int \
atomic_fcmpset_acq_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t *cmpval, uint##WIDTH##_t newval) \
{ \
int retval; \
\
retval = atomic_fcmpset_##WIDTH(p, cmpval, newval); \
fence(); \
return (retval); \
} \
\
static __inline int \
atomic_fcmpset_rel_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t *cmpval, uint##WIDTH##_t newval) \
{ \
fence(); \
return (atomic_fcmpset_##WIDTH(p, cmpval, newval)); \
}
ATOMIC_CMPSET_ACQ_REL(8);
ATOMIC_FCMPSET_ACQ_REL(8);
ATOMIC_CMPSET_ACQ_REL(16);
ATOMIC_FCMPSET_ACQ_REL(16);
#define atomic_cmpset_char atomic_cmpset_8
#define atomic_cmpset_acq_char atomic_cmpset_acq_8
#define atomic_cmpset_rel_char atomic_cmpset_rel_8
#define atomic_fcmpset_char atomic_fcmpset_8
#define atomic_fcmpset_acq_char atomic_fcmpset_acq_8
#define atomic_fcmpset_rel_char atomic_fcmpset_rel_8
#define atomic_cmpset_short atomic_cmpset_16
#define atomic_cmpset_acq_short atomic_cmpset_acq_16
#define atomic_cmpset_rel_short atomic_cmpset_rel_16
#define atomic_fcmpset_short atomic_fcmpset_16
#define atomic_fcmpset_acq_short atomic_fcmpset_acq_16
#define atomic_fcmpset_rel_short atomic_fcmpset_rel_16
static __inline void
atomic_add_32(volatile uint32_t *p, uint32_t val)
{
__asm __volatile("amoadd.w zero, %1, %0"
: "+A" (*p)
: "r" (val)
: "memory");
}
static __inline void
atomic_subtract_32(volatile uint32_t *p, uint32_t val)
{
__asm __volatile("amoadd.w zero, %1, %0"
: "+A" (*p)
: "r" (-val)
: "memory");
}
static __inline void
atomic_set_32(volatile uint32_t *p, uint32_t val)
{
__asm __volatile("amoor.w zero, %1, %0"
: "+A" (*p)
: "r" (val)
: "memory");
}
static __inline void
atomic_clear_32(volatile uint32_t *p, uint32_t val)
{
__asm __volatile("amoand.w zero, %1, %0"
: "+A" (*p)
: "r" (~val)
: "memory");
}
static __inline int
atomic_cmpset_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
{
uint32_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.w %0, %2\n"
"bne %0, %z3, 1f\n"
"sc.w %1, %z4, %2\n"
"bnez %1, 0b\n"
"1:"
: "=&r" (tmp), "=&r" (res), "+A" (*p)
: "rJ" ((long)(int32_t)cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline int
atomic_fcmpset_32(volatile uint32_t *p, uint32_t *cmpval, uint32_t newval)
{
uint32_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.w %0, %2\n" /* Load old value */
"bne %0, %z4, 1f\n" /* Compare */
"sc.w %1, %z5, %2\n" /* Try to store new value */
"j 2f\n"
"1:"
"sw %0, %3\n" /* Save old value */
"2:"
: "=&r" (tmp), "=&r" (res), "+A" (*p), "+A" (*cmpval)
: "rJ" ((long)(int32_t)*cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline uint32_t
atomic_fetchadd_32(volatile uint32_t *p, uint32_t val)
{
uint32_t ret;
__asm __volatile("amoadd.w %0, %2, %1"
: "=&r" (ret), "+A" (*p)
: "r" (val)
: "memory");
return (ret);
}
static __inline uint32_t
atomic_readandclear_32(volatile uint32_t *p)
{
uint32_t ret;
uint32_t val;
val = 0;
__asm __volatile("amoswap.w %0, %2, %1"
: "=&r"(ret), "+A" (*p)
: "r" (val)
: "memory");
return (ret);
}
#define atomic_add_int atomic_add_32
#define atomic_clear_int atomic_clear_32
#define atomic_cmpset_int atomic_cmpset_32
#define atomic_fcmpset_int atomic_fcmpset_32
#define atomic_fetchadd_int atomic_fetchadd_32
#define atomic_readandclear_int atomic_readandclear_32
#define atomic_set_int atomic_set_32
#define atomic_subtract_int atomic_subtract_32
ATOMIC_ACQ_REL(set, 32)
ATOMIC_ACQ_REL(clear, 32)
ATOMIC_ACQ_REL(add, 32)
ATOMIC_ACQ_REL(subtract, 32)
ATOMIC_CMPSET_ACQ_REL(32);
ATOMIC_FCMPSET_ACQ_REL(32);
static __inline uint32_t
atomic_load_acq_32(volatile uint32_t *p)
{
uint32_t ret;
ret = *p;
fence();
return (ret);
}
static __inline void
atomic_store_rel_32(volatile uint32_t *p, uint32_t val)
{
fence();
*p = val;
}
#define atomic_add_acq_int atomic_add_acq_32
#define atomic_clear_acq_int atomic_clear_acq_32
#define atomic_cmpset_acq_int atomic_cmpset_acq_32
#define atomic_fcmpset_acq_int atomic_fcmpset_acq_32
#define atomic_load_acq_int atomic_load_acq_32
#define atomic_set_acq_int atomic_set_acq_32
#define atomic_subtract_acq_int atomic_subtract_acq_32
#define atomic_add_rel_int atomic_add_rel_32
#define atomic_clear_rel_int atomic_clear_rel_32
#define atomic_cmpset_rel_int atomic_cmpset_rel_32
#define atomic_fcmpset_rel_int atomic_fcmpset_rel_32
#define atomic_set_rel_int atomic_set_rel_32
#define atomic_subtract_rel_int atomic_subtract_rel_32
#define atomic_store_rel_int atomic_store_rel_32
static __inline void
atomic_add_64(volatile uint64_t *p, uint64_t val)
{
__asm __volatile("amoadd.d zero, %1, %0"
: "+A" (*p)
: "r" (val)
: "memory");
}
static __inline void
atomic_subtract_64(volatile uint64_t *p, uint64_t val)
{
__asm __volatile("amoadd.d zero, %1, %0"
: "+A" (*p)
: "r" (-val)
: "memory");
}
static __inline void
atomic_set_64(volatile uint64_t *p, uint64_t val)
{
__asm __volatile("amoor.d zero, %1, %0"
: "+A" (*p)
: "r" (val)
: "memory");
}
static __inline void
atomic_clear_64(volatile uint64_t *p, uint64_t val)
{
__asm __volatile("amoand.d zero, %1, %0"
: "+A" (*p)
: "r" (~val)
: "memory");
}
static __inline int
atomic_cmpset_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
{
uint64_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.d %0, %2\n"
"bne %0, %z3, 1f\n"
"sc.d %1, %z4, %2\n"
"bnez %1, 0b\n"
"1:"
: "=&r" (tmp), "=&r" (res), "+A" (*p)
: "rJ" (cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline int
atomic_fcmpset_64(volatile uint64_t *p, uint64_t *cmpval, uint64_t newval)
{
uint64_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.d %0, %2\n" /* Load old value */
"bne %0, %z4, 1f\n" /* Compare */
"sc.d %1, %z5, %2\n" /* Try to store new value */
"j 2f\n"
"1:"
"sd %0, %3\n" /* Save old value */
"2:"
: "=&r" (tmp), "=&r" (res), "+A" (*p), "+A" (*cmpval)
: "rJ" (*cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline uint64_t
atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
{
uint64_t ret;
__asm __volatile("amoadd.d %0, %2, %1"
: "=&r" (ret), "+A" (*p)
: "r" (val)
: "memory");
return (ret);
}
static __inline uint64_t
atomic_readandclear_64(volatile uint64_t *p)
{
uint64_t ret;
uint64_t val;
val = 0;
__asm __volatile("amoswap.d %0, %2, %1"
: "=&r"(ret), "+A" (*p)
: "r" (val)
: "memory");
return (ret);
}
static __inline uint32_t
atomic_swap_32(volatile uint32_t *p, uint32_t val)
{
uint32_t old;
__asm __volatile("amoswap.w %0, %2, %1"
: "=&r"(old), "+A" (*p)
: "r" (val)
: "memory");
return (old);
}
static __inline uint64_t
atomic_swap_64(volatile uint64_t *p, uint64_t val)
{
uint64_t old;
__asm __volatile("amoswap.d %0, %2, %1"
: "=&r"(old), "+A" (*p)
: "r" (val)
: "memory");
return (old);
}
#define atomic_swap_int atomic_swap_32
#define atomic_add_long atomic_add_64
#define atomic_clear_long atomic_clear_64
#define atomic_cmpset_long atomic_cmpset_64
#define atomic_fcmpset_long atomic_fcmpset_64
#define atomic_fetchadd_long atomic_fetchadd_64
#define atomic_readandclear_long atomic_readandclear_64
#define atomic_set_long atomic_set_64
#define atomic_subtract_long atomic_subtract_64
#define atomic_swap_long atomic_swap_64
#define atomic_add_ptr atomic_add_64
#define atomic_clear_ptr atomic_clear_64
#define atomic_cmpset_ptr atomic_cmpset_64
#define atomic_fcmpset_ptr atomic_fcmpset_64
#define atomic_fetchadd_ptr atomic_fetchadd_64
#define atomic_readandclear_ptr atomic_readandclear_64
#define atomic_set_ptr atomic_set_64
#define atomic_subtract_ptr atomic_subtract_64
#define atomic_swap_ptr atomic_swap_64
ATOMIC_ACQ_REL(set, 64)
ATOMIC_ACQ_REL(clear, 64)
ATOMIC_ACQ_REL(add, 64)
ATOMIC_ACQ_REL(subtract, 64)
ATOMIC_CMPSET_ACQ_REL(64);
ATOMIC_FCMPSET_ACQ_REL(64);
static __inline uint64_t
atomic_load_acq_64(volatile uint64_t *p)
{
uint64_t ret;
ret = *p;
fence();
return (ret);
}
static __inline void
atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
{
fence();
*p = val;
}
#define atomic_add_acq_long atomic_add_acq_64
#define atomic_clear_acq_long atomic_clear_acq_64
#define atomic_cmpset_acq_long atomic_cmpset_acq_64
#define atomic_fcmpset_acq_long atomic_fcmpset_acq_64
#define atomic_load_acq_long atomic_load_acq_64
#define atomic_set_acq_long atomic_set_acq_64
#define atomic_subtract_acq_long atomic_subtract_acq_64
#define atomic_add_acq_ptr atomic_add_acq_64
#define atomic_clear_acq_ptr atomic_clear_acq_64
#define atomic_cmpset_acq_ptr atomic_cmpset_acq_64
#define atomic_fcmpset_acq_ptr atomic_fcmpset_acq_64
#define atomic_load_acq_ptr atomic_load_acq_64
#define atomic_set_acq_ptr atomic_set_acq_64
#define atomic_subtract_acq_ptr atomic_subtract_acq_64
#undef ATOMIC_ACQ_REL
static __inline void
atomic_thread_fence_acq(void)
{
fence();
}
static __inline void
atomic_thread_fence_rel(void)
{
fence();
}
static __inline void
atomic_thread_fence_acq_rel(void)
{
fence();
}
static __inline void
atomic_thread_fence_seq_cst(void)
{
fence();
}
#define atomic_add_rel_long atomic_add_rel_64
#define atomic_clear_rel_long atomic_clear_rel_64
#define atomic_add_rel_long atomic_add_rel_64
#define atomic_clear_rel_long atomic_clear_rel_64
#define atomic_cmpset_rel_long atomic_cmpset_rel_64
#define atomic_fcmpset_rel_long atomic_fcmpset_rel_64
#define atomic_set_rel_long atomic_set_rel_64
#define atomic_subtract_rel_long atomic_subtract_rel_64
#define atomic_store_rel_long atomic_store_rel_64
#define atomic_add_rel_ptr atomic_add_rel_64
#define atomic_clear_rel_ptr atomic_clear_rel_64
#define atomic_cmpset_rel_ptr atomic_cmpset_rel_64
#define atomic_fcmpset_rel_ptr atomic_fcmpset_rel_64
#define atomic_set_rel_ptr atomic_set_rel_64
#define atomic_subtract_rel_ptr atomic_subtract_rel_64
#define atomic_store_rel_ptr atomic_store_rel_64
#include <sys/_atomic_subword.h>
#endif /* _MACHINE_ATOMIC_H_ */
plain