mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-04 05:58:57 +00:00
fdafd315ad
Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2019 Justin Hibbits
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/smp.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <machine/atomic.h>
|
|
#include <machine/param.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
|
|
enum {
|
|
ATOMIC64_ADD,
|
|
ATOMIC64_CLEAR,
|
|
ATOMIC64_CMPSET,
|
|
ATOMIC64_FCMPSET,
|
|
ATOMIC64_FETCHADD,
|
|
ATOMIC64_LOAD,
|
|
ATOMIC64_SET,
|
|
ATOMIC64_SUBTRACT,
|
|
ATOMIC64_STORE,
|
|
ATOMIC64_SWAP
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
#ifdef SMP
|
|
|
|
#define A64_POOL_SIZE MAXCPU
|
|
/* Estimated size of a cacheline */
|
|
#define CACHE_ALIGN CACHE_LINE_SIZE
|
|
static struct mtx a64_mtx_pool[A64_POOL_SIZE];
|
|
|
|
#define GET_MUTEX(p) \
|
|
(&a64_mtx_pool[(pmap_kextract((vm_offset_t)p) / CACHE_ALIGN) % (A64_POOL_SIZE)])
|
|
|
|
#define LOCK_A64() \
|
|
struct mtx *_amtx = GET_MUTEX(p); \
|
|
if (smp_started) mtx_lock(_amtx)
|
|
|
|
#define UNLOCK_A64() if (smp_started) mtx_unlock(_amtx)
|
|
|
|
#else /* !SMP */
|
|
|
|
#define LOCK_A64() { register_t s = intr_disable()
|
|
#define UNLOCK_A64() intr_restore(s); }
|
|
|
|
#endif /* SMP */
|
|
|
|
#define ATOMIC64_EMU_UN(op, rt, block, ret) \
|
|
rt \
|
|
atomic_##op##_64(volatile uint64_t *p) { \
|
|
uint64_t tmp __unused; \
|
|
LOCK_A64(); \
|
|
block; \
|
|
UNLOCK_A64(); \
|
|
ret; } struct hack
|
|
|
|
#define ATOMIC64_EMU_BIN(op, rt, block, ret) \
|
|
rt \
|
|
atomic_##op##_64(volatile uint64_t *p, uint64_t v) { \
|
|
uint64_t tmp __unused; \
|
|
LOCK_A64(); \
|
|
block; \
|
|
UNLOCK_A64(); \
|
|
ret; } struct hack
|
|
|
|
ATOMIC64_EMU_BIN(add, void, (*p = *p + v), return);
|
|
ATOMIC64_EMU_BIN(clear, void, *p &= ~v, return);
|
|
ATOMIC64_EMU_BIN(fetchadd, uint64_t, (*p = *p + v, v = *p - v), return (v));
|
|
ATOMIC64_EMU_UN(load, uint64_t, (tmp = *p), return (tmp));
|
|
ATOMIC64_EMU_BIN(set, void, *p |= v, return);
|
|
ATOMIC64_EMU_BIN(subtract, void, (*p = *p - v), return);
|
|
ATOMIC64_EMU_BIN(store, void, *p = v, return);
|
|
ATOMIC64_EMU_BIN(swap, uint64_t, tmp = *p; *p = v; v = tmp, return(v));
|
|
|
|
int atomic_cmpset_64(volatile uint64_t *p, uint64_t old, uint64_t new)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
LOCK_A64();
|
|
tmp = *p;
|
|
if (tmp == old)
|
|
*p = new;
|
|
UNLOCK_A64();
|
|
|
|
return (tmp == old);
|
|
}
|
|
|
|
int atomic_fcmpset_64(volatile uint64_t *p, uint64_t *old, uint64_t new)
|
|
{
|
|
uint64_t tmp, tmp_old;
|
|
|
|
LOCK_A64();
|
|
tmp = *p;
|
|
tmp_old = *old;
|
|
if (tmp == tmp_old)
|
|
*p = new;
|
|
else
|
|
*old = tmp;
|
|
UNLOCK_A64();
|
|
|
|
return (tmp == tmp_old);
|
|
}
|
|
|
|
#ifdef SMP
|
|
static void
|
|
atomic64_mtxinit(void *x __unused)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < A64_POOL_SIZE; i++)
|
|
mtx_init(&a64_mtx_pool[i], "atomic64 mutex", NULL, MTX_DEF);
|
|
}
|
|
|
|
SYSINIT(atomic64_mtxinit, SI_SUB_LOCK, SI_ORDER_MIDDLE, atomic64_mtxinit, NULL);
|
|
#endif /* SMP */
|
|
|
|
#endif /* _KERNEL */
|