1135 lines
27 KiB
C
1135 lines
27 KiB
C
/* $NetBSD: atomic.h,v 1.1 2002/10/19 12:22:34 bsh Exp $ */
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/*-
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* Copyright (C) 2003-2004 Olivier Houchard
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* Copyright (C) 1994-1997 Mark Brinicombe
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* Copyright (C) 1994 Brini
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of Brini may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_ATOMIC_H_
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#define _MACHINE_ATOMIC_H_
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#include <sys/types.h>
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#include <machine/armreg.h>
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#ifndef _KERNEL
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#include <machine/sysarch.h>
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#else
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#include <machine/cpuconf.h>
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#endif
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#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
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#define isb() __asm __volatile("isb" : : : "memory")
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#define dsb() __asm __volatile("dsb" : : : "memory")
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#define dmb() __asm __volatile("dmb" : : : "memory")
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#elif defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6J__) || \
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defined (__ARM_ARCH_6K__) || defined (__ARM_ARCH_6T2__) || \
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defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
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#define isb() __asm __volatile("mcr p15, 0, %0, c7, c5, 4" : : "r" (0) : "memory")
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#define dsb() __asm __volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0) : "memory")
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#define dmb() __asm __volatile("mcr p15, 0, %0, c7, c10, 5" : : "r" (0) : "memory")
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#else
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#define isb() __asm __volatile("mcr p15, 0, %0, c7, c5, 4" : : "r" (0) : "memory")
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#define dsb() __asm __volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0) : "memory")
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#define dmb() dsb()
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#endif
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#define mb() dmb()
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#define wmb() dmb()
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#define rmb() dmb()
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/*
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* It would be nice to use _HAVE_ARMv6_INSTRUCTIONS from machine/asm.h
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* here, but that header can't be included here because this is C
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* code. I would like to move the _HAVE_ARMv6_INSTRUCTIONS definition
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* out of asm.h so it can be used in both asm and C code. - kientzle@
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*/
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#if defined (__ARM_ARCH_7__) || \
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defined (__ARM_ARCH_7A__) || \
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defined (__ARM_ARCH_6__) || \
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defined (__ARM_ARCH_6J__) || \
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defined (__ARM_ARCH_6K__) || \
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defined (__ARM_ARCH_6T2__) || \
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defined (__ARM_ARCH_6Z__) || \
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defined (__ARM_ARCH_6ZK__)
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#define ARM_HAVE_ATOMIC64
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static __inline void
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__do_dmb(void)
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{
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#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
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__asm __volatile("dmb" : : : "memory");
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#else
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__asm __volatile("mcr p15, 0, r0, c7, c10, 5" : : : "memory");
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#endif
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}
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#define ATOMIC_ACQ_REL_LONG(NAME) \
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static __inline void \
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atomic_##NAME##_acq_long(__volatile u_long *p, u_long v) \
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{ \
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atomic_##NAME##_long(p, v); \
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__do_dmb(); \
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} \
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\
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static __inline void \
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atomic_##NAME##_rel_long(__volatile u_long *p, u_long v) \
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{ \
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__do_dmb(); \
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atomic_##NAME##_long(p, v); \
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}
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#define ATOMIC_ACQ_REL(NAME, WIDTH) \
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static __inline void \
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atomic_##NAME##_acq_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
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{ \
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atomic_##NAME##_##WIDTH(p, v); \
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__do_dmb(); \
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} \
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\
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static __inline void \
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atomic_##NAME##_rel_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
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{ \
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__do_dmb(); \
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atomic_##NAME##_##WIDTH(p, v); \
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}
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static __inline void
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atomic_set_32(volatile uint32_t *address, uint32_t setmask)
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{
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uint32_t tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"orr %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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, "+r" (address), "+r" (setmask) : : "cc", "memory");
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}
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static __inline void
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atomic_set_64(volatile uint64_t *p, uint64_t val)
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{
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uint64_t tmp;
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uint32_t exflag;
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__asm __volatile(
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"1: \n"
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" ldrexd %[tmp], [%[ptr]]\n"
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" orr %Q[tmp], %Q[val]\n"
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" orr %R[tmp], %R[val]\n"
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" strexd %[exf], %[tmp], [%[ptr]]\n"
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" teq %[exf], #0\n"
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" it ne \n"
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" bne 1b\n"
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: [exf] "=&r" (exflag),
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[tmp] "=&r" (tmp)
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: [ptr] "r" (p),
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[val] "r" (val)
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: "cc", "memory");
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}
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static __inline void
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atomic_set_long(volatile u_long *address, u_long setmask)
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{
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u_long tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"orr %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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, "+r" (address), "+r" (setmask) : : "cc", "memory");
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}
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static __inline void
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atomic_clear_32(volatile uint32_t *address, uint32_t setmask)
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{
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uint32_t tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"bic %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (address), "+r" (setmask) : : "cc", "memory");
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}
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static __inline void
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atomic_clear_64(volatile uint64_t *p, uint64_t val)
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{
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uint64_t tmp;
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uint32_t exflag;
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__asm __volatile(
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"1: \n"
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" ldrexd %[tmp], [%[ptr]]\n"
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" bic %Q[tmp], %Q[val]\n"
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" bic %R[tmp], %R[val]\n"
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" strexd %[exf], %[tmp], [%[ptr]]\n"
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" teq %[exf], #0\n"
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" it ne \n"
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" bne 1b\n"
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: [exf] "=&r" (exflag),
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[tmp] "=&r" (tmp)
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: [ptr] "r" (p),
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[val] "r" (val)
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: "cc", "memory");
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}
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static __inline void
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atomic_clear_long(volatile u_long *address, u_long setmask)
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{
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u_long tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"bic %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (address), "+r" (setmask) : : "cc", "memory");
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}
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static __inline u_int32_t
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atomic_cmpset_32(volatile u_int32_t *p, volatile u_int32_t cmpval, volatile u_int32_t newval)
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{
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uint32_t ret;
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__asm __volatile("1: ldrex %0, [%1]\n"
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"cmp %0, %2\n"
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"itt ne\n"
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"movne %0, #0\n"
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"bne 2f\n"
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"strex %0, %3, [%1]\n"
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"cmp %0, #0\n"
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"ite eq\n"
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"moveq %0, #1\n"
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"bne 1b\n"
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"2:"
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: "=&r" (ret)
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,"+r" (p), "+r" (cmpval), "+r" (newval) : : "cc",
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"memory");
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return (ret);
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}
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static __inline int
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atomic_cmpset_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
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{
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uint64_t tmp;
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uint32_t ret;
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__asm __volatile(
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"1: \n"
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" ldrexd %[tmp], [%[ptr]]\n"
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" teq %Q[tmp], %Q[cmpval]\n"
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" itee eq \n"
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" teqeq %R[tmp], %R[cmpval]\n"
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" movne %[ret], #0\n"
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" bne 2f\n"
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" strexd %[ret], %[newval], [%[ptr]]\n"
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" teq %[ret], #0\n"
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" it ne \n"
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" bne 1b\n"
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" mov %[ret], #1\n"
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"2: \n"
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: [ret] "=&r" (ret),
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[tmp] "=&r" (tmp)
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: [ptr] "r" (p),
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[cmpval] "r" (cmpval),
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[newval] "r" (newval)
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: "cc", "memory");
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return (ret);
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}
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static __inline u_long
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atomic_cmpset_long(volatile u_long *p, volatile u_long cmpval, volatile u_long newval)
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{
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u_long ret;
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__asm __volatile("1: ldrex %0, [%1]\n"
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"cmp %0, %2\n"
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"itt ne\n"
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"movne %0, #0\n"
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"bne 2f\n"
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"strex %0, %3, [%1]\n"
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"cmp %0, #0\n"
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"ite eq\n"
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"moveq %0, #1\n"
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"bne 1b\n"
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"2:"
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: "=&r" (ret)
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,"+r" (p), "+r" (cmpval), "+r" (newval) : : "cc",
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"memory");
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return (ret);
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}
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static __inline u_int32_t
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atomic_cmpset_acq_32(volatile u_int32_t *p, volatile u_int32_t cmpval, volatile u_int32_t newval)
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{
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u_int32_t ret = atomic_cmpset_32(p, cmpval, newval);
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__do_dmb();
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return (ret);
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}
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static __inline uint64_t
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atomic_cmpset_acq_64(volatile uint64_t *p, volatile uint64_t cmpval, volatile uint64_t newval)
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{
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uint64_t ret = atomic_cmpset_64(p, cmpval, newval);
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__do_dmb();
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return (ret);
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}
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static __inline u_long
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atomic_cmpset_acq_long(volatile u_long *p, volatile u_long cmpval, volatile u_long newval)
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{
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u_long ret = atomic_cmpset_long(p, cmpval, newval);
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__do_dmb();
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return (ret);
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}
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static __inline u_int32_t
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atomic_cmpset_rel_32(volatile u_int32_t *p, volatile u_int32_t cmpval, volatile u_int32_t newval)
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{
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__do_dmb();
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return (atomic_cmpset_32(p, cmpval, newval));
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}
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static __inline uint64_t
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atomic_cmpset_rel_64(volatile uint64_t *p, volatile uint64_t cmpval, volatile uint64_t newval)
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{
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__do_dmb();
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return (atomic_cmpset_64(p, cmpval, newval));
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}
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static __inline u_long
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atomic_cmpset_rel_long(volatile u_long *p, volatile u_long cmpval, volatile u_long newval)
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{
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__do_dmb();
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return (atomic_cmpset_long(p, cmpval, newval));
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}
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static __inline void
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atomic_add_32(volatile u_int32_t *p, u_int32_t val)
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{
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uint32_t tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"add %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (p), "+r" (val) : : "cc", "memory");
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}
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static __inline void
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atomic_add_64(volatile uint64_t *p, uint64_t val)
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{
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uint64_t tmp;
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uint32_t exflag;
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__asm __volatile(
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"1: \n"
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" ldrexd %[tmp], [%[ptr]]\n"
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" adds %Q[tmp], %Q[val]\n"
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" adc %R[tmp], %R[val]\n"
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" strexd %[exf], %[tmp], [%[ptr]]\n"
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" teq %[exf], #0\n"
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" it ne \n"
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" bne 1b\n"
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: [exf] "=&r" (exflag),
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[tmp] "=&r" (tmp)
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: [ptr] "r" (p),
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[val] "r" (val)
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: "cc", "memory");
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}
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static __inline void
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atomic_add_long(volatile u_long *p, u_long val)
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{
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u_long tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"add %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (p), "+r" (val) : : "cc", "memory");
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}
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static __inline void
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atomic_subtract_32(volatile u_int32_t *p, u_int32_t val)
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{
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uint32_t tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"sub %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (p), "+r" (val) : : "cc", "memory");
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}
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static __inline void
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atomic_subtract_64(volatile uint64_t *p, uint64_t val)
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{
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uint64_t tmp;
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uint32_t exflag;
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__asm __volatile(
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"1: \n"
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" ldrexd %[tmp], [%[ptr]]\n"
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" subs %Q[tmp], %Q[val]\n"
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" sbc %R[tmp], %R[val]\n"
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" strexd %[exf], %[tmp], [%[ptr]]\n"
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" teq %[exf], #0\n"
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" it ne \n"
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" bne 1b\n"
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: [exf] "=&r" (exflag),
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[tmp] "=&r" (tmp)
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: [ptr] "r" (p),
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[val] "r" (val)
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: "cc", "memory");
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}
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static __inline void
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atomic_subtract_long(volatile u_long *p, u_long val)
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{
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u_long tmp = 0, tmp2 = 0;
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__asm __volatile("1: ldrex %0, [%2]\n"
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"sub %0, %0, %3\n"
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"strex %1, %0, [%2]\n"
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"cmp %1, #0\n"
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"it ne\n"
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"bne 1b\n"
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: "=&r" (tmp), "+r" (tmp2)
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,"+r" (p), "+r" (val) : : "cc", "memory");
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}
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ATOMIC_ACQ_REL(clear, 32)
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ATOMIC_ACQ_REL(add, 32)
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ATOMIC_ACQ_REL(subtract, 32)
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ATOMIC_ACQ_REL(set, 32)
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ATOMIC_ACQ_REL(clear, 64)
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ATOMIC_ACQ_REL(add, 64)
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ATOMIC_ACQ_REL(subtract, 64)
|
|
ATOMIC_ACQ_REL(set, 64)
|
|
ATOMIC_ACQ_REL_LONG(clear)
|
|
ATOMIC_ACQ_REL_LONG(add)
|
|
ATOMIC_ACQ_REL_LONG(subtract)
|
|
ATOMIC_ACQ_REL_LONG(set)
|
|
|
|
#undef ATOMIC_ACQ_REL
|
|
#undef ATOMIC_ACQ_REL_LONG
|
|
|
|
static __inline uint32_t
|
|
atomic_fetchadd_32(volatile uint32_t *p, uint32_t val)
|
|
{
|
|
uint32_t tmp = 0, tmp2 = 0, ret = 0;
|
|
|
|
__asm __volatile("1: ldrex %0, [%3]\n"
|
|
"add %1, %0, %4\n"
|
|
"strex %2, %1, [%3]\n"
|
|
"cmp %2, #0\n"
|
|
"it ne\n"
|
|
"bne 1b\n"
|
|
: "+r" (ret), "=&r" (tmp), "+r" (tmp2)
|
|
,"+r" (p), "+r" (val) : : "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
atomic_readandclear_32(volatile u_int32_t *p)
|
|
{
|
|
uint32_t ret, tmp = 0, tmp2 = 0;
|
|
|
|
__asm __volatile("1: ldrex %0, [%3]\n"
|
|
"mov %1, #0\n"
|
|
"strex %2, %1, [%3]\n"
|
|
"cmp %2, #0\n"
|
|
"it ne\n"
|
|
"bne 1b\n"
|
|
: "=r" (ret), "=&r" (tmp), "+r" (tmp2)
|
|
,"+r" (p) : : "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
atomic_load_acq_32(volatile uint32_t *p)
|
|
{
|
|
uint32_t v;
|
|
|
|
v = *p;
|
|
__do_dmb();
|
|
return (v);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_32(volatile uint32_t *p, uint32_t v)
|
|
{
|
|
|
|
__do_dmb();
|
|
*p = v;
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
|
|
{
|
|
uint64_t ret, tmp;
|
|
uint32_t exflag;
|
|
|
|
__asm __volatile(
|
|
"1: \n"
|
|
" ldrexd %[ret], [%[ptr]]\n"
|
|
" adds %Q[tmp], %Q[ret], %Q[val]\n"
|
|
" adc %R[tmp], %R[ret], %R[val]\n"
|
|
" strexd %[exf], %[tmp], [%[ptr]]\n"
|
|
" teq %[exf], #0\n"
|
|
" it ne \n"
|
|
" bne 1b\n"
|
|
: [ret] "=&r" (ret),
|
|
[exf] "=&r" (exflag),
|
|
[tmp] "=&r" (tmp)
|
|
: [ptr] "r" (p),
|
|
[val] "r" (val)
|
|
: "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_readandclear_64(volatile uint64_t *p)
|
|
{
|
|
uint64_t ret, tmp;
|
|
uint32_t exflag;
|
|
|
|
__asm __volatile(
|
|
"1: \n"
|
|
" ldrexd %[ret], [%[ptr]]\n"
|
|
" mov %Q[tmp], #0\n"
|
|
" mov %R[tmp], #0\n"
|
|
" strexd %[exf], %[tmp], [%[ptr]]\n"
|
|
" teq %[exf], #0\n"
|
|
" it ne \n"
|
|
" bne 1b\n"
|
|
: [ret] "=&r" (ret),
|
|
[exf] "=&r" (exflag),
|
|
[tmp] "=&r" (tmp)
|
|
: [ptr] "r" (p)
|
|
: "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_64(volatile uint64_t *p)
|
|
{
|
|
uint64_t ret;
|
|
|
|
/*
|
|
* The only way to atomically load 64 bits is with LDREXD which puts the
|
|
* exclusive monitor into the exclusive state, so reset it to open state
|
|
* with CLREX because we don't actually need to store anything.
|
|
*/
|
|
__asm __volatile(
|
|
"1: \n"
|
|
" ldrexd %[ret], [%[ptr]]\n"
|
|
" clrex \n"
|
|
: [ret] "=&r" (ret)
|
|
: [ptr] "r" (p)
|
|
: "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_acq_64(volatile uint64_t *p)
|
|
{
|
|
uint64_t ret;
|
|
|
|
ret = atomic_load_64(p);
|
|
__do_dmb();
|
|
return (ret);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_64(volatile uint64_t *p, uint64_t val)
|
|
{
|
|
uint64_t tmp;
|
|
uint32_t exflag;
|
|
|
|
/*
|
|
* The only way to atomically store 64 bits is with STREXD, which will
|
|
* succeed only if paired up with a preceeding LDREXD using the same
|
|
* address, so we read and discard the existing value before storing.
|
|
*/
|
|
__asm __volatile(
|
|
"1: \n"
|
|
" ldrexd %[tmp], [%[ptr]]\n"
|
|
" strexd %[exf], %[val], [%[ptr]]\n"
|
|
" teq %[exf], #0\n"
|
|
" it ne \n"
|
|
" bne 1b\n"
|
|
: [tmp] "=&r" (tmp),
|
|
[exf] "=&r" (exflag)
|
|
: [ptr] "r" (p),
|
|
[val] "r" (val)
|
|
: "cc", "memory");
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
|
|
{
|
|
|
|
__do_dmb();
|
|
atomic_store_64(p, val);
|
|
}
|
|
|
|
static __inline u_long
|
|
atomic_fetchadd_long(volatile u_long *p, u_long val)
|
|
{
|
|
u_long tmp = 0, tmp2 = 0, ret = 0;
|
|
|
|
__asm __volatile("1: ldrex %0, [%3]\n"
|
|
"add %1, %0, %4\n"
|
|
"strex %2, %1, [%3]\n"
|
|
"cmp %2, #0\n"
|
|
"it ne\n"
|
|
"bne 1b\n"
|
|
: "+r" (ret), "=&r" (tmp), "+r" (tmp2)
|
|
,"+r" (p), "+r" (val) : : "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline u_long
|
|
atomic_readandclear_long(volatile u_long *p)
|
|
{
|
|
u_long ret, tmp = 0, tmp2 = 0;
|
|
|
|
__asm __volatile("1: ldrex %0, [%3]\n"
|
|
"mov %1, #0\n"
|
|
"strex %2, %1, [%3]\n"
|
|
"cmp %2, #0\n"
|
|
"it ne\n"
|
|
"bne 1b\n"
|
|
: "=r" (ret), "=&r" (tmp), "+r" (tmp2)
|
|
,"+r" (p) : : "cc", "memory");
|
|
return (ret);
|
|
}
|
|
|
|
static __inline u_long
|
|
atomic_load_acq_long(volatile u_long *p)
|
|
{
|
|
u_long v;
|
|
|
|
v = *p;
|
|
__do_dmb();
|
|
return (v);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_long(volatile u_long *p, u_long v)
|
|
{
|
|
|
|
__do_dmb();
|
|
*p = v;
|
|
}
|
|
#else /* < armv6 */
|
|
|
|
#define __with_interrupts_disabled(expr) \
|
|
do { \
|
|
u_int cpsr_save, tmp; \
|
|
\
|
|
__asm __volatile( \
|
|
"mrs %0, cpsr;" \
|
|
"orr %1, %0, %2;" \
|
|
"msr cpsr_fsxc, %1;" \
|
|
: "=r" (cpsr_save), "=r" (tmp) \
|
|
: "I" (PSR_I | PSR_F) \
|
|
: "cc" ); \
|
|
(expr); \
|
|
__asm __volatile( \
|
|
"msr cpsr_fsxc, %0" \
|
|
: /* no output */ \
|
|
: "r" (cpsr_save) \
|
|
: "cc" ); \
|
|
} while(0)
|
|
|
|
static __inline uint32_t
|
|
__swp(uint32_t val, volatile uint32_t *ptr)
|
|
{
|
|
__asm __volatile("swp %0, %2, [%3]"
|
|
: "=&r" (val), "=m" (*ptr)
|
|
: "r" (val), "r" (ptr), "m" (*ptr)
|
|
: "memory");
|
|
return (val);
|
|
}
|
|
|
|
|
|
#ifdef _KERNEL
|
|
#define ARM_HAVE_ATOMIC64
|
|
|
|
static __inline void
|
|
atomic_set_32(volatile uint32_t *address, uint32_t setmask)
|
|
{
|
|
__with_interrupts_disabled(*address |= setmask);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_set_64(volatile uint64_t *address, uint64_t setmask)
|
|
{
|
|
__with_interrupts_disabled(*address |= setmask);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_clear_32(volatile uint32_t *address, uint32_t clearmask)
|
|
{
|
|
__with_interrupts_disabled(*address &= ~clearmask);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_clear_64(volatile uint64_t *address, uint64_t clearmask)
|
|
{
|
|
__with_interrupts_disabled(*address &= ~clearmask);
|
|
}
|
|
|
|
static __inline u_int32_t
|
|
atomic_cmpset_32(volatile u_int32_t *p, volatile u_int32_t cmpval, volatile u_int32_t newval)
|
|
{
|
|
int ret;
|
|
|
|
__with_interrupts_disabled(
|
|
{
|
|
if (*p == cmpval) {
|
|
*p = newval;
|
|
ret = 1;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
});
|
|
return (ret);
|
|
}
|
|
|
|
static __inline u_int64_t
|
|
atomic_cmpset_64(volatile u_int64_t *p, volatile u_int64_t cmpval, volatile u_int64_t newval)
|
|
{
|
|
int ret;
|
|
|
|
__with_interrupts_disabled(
|
|
{
|
|
if (*p == cmpval) {
|
|
*p = newval;
|
|
ret = 1;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
});
|
|
return (ret);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_add_32(volatile u_int32_t *p, u_int32_t val)
|
|
{
|
|
__with_interrupts_disabled(*p += val);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_add_64(volatile u_int64_t *p, u_int64_t val)
|
|
{
|
|
__with_interrupts_disabled(*p += val);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_subtract_32(volatile u_int32_t *p, u_int32_t val)
|
|
{
|
|
__with_interrupts_disabled(*p -= val);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_subtract_64(volatile u_int64_t *p, u_int64_t val)
|
|
{
|
|
__with_interrupts_disabled(*p -= val);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
atomic_fetchadd_32(volatile uint32_t *p, uint32_t v)
|
|
{
|
|
uint32_t value;
|
|
|
|
__with_interrupts_disabled(
|
|
{
|
|
value = *p;
|
|
*p += v;
|
|
});
|
|
return (value);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_fetchadd_64(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
uint64_t value;
|
|
|
|
__with_interrupts_disabled(
|
|
{
|
|
value = *p;
|
|
*p += v;
|
|
});
|
|
return (value);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_64(volatile uint64_t *p)
|
|
{
|
|
uint64_t value;
|
|
|
|
__with_interrupts_disabled(value = *p);
|
|
return (value);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_64(volatile uint64_t *p, uint64_t value)
|
|
{
|
|
__with_interrupts_disabled(*p = value);
|
|
}
|
|
|
|
#else /* !_KERNEL */
|
|
|
|
static __inline u_int32_t
|
|
atomic_cmpset_32(volatile u_int32_t *p, volatile u_int32_t cmpval, volatile u_int32_t newval)
|
|
{
|
|
register int done, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%2]\n"
|
|
"cmp %1, %3\n"
|
|
"streq %4, [%2]\n"
|
|
"2:\n"
|
|
"mov %1, #0\n"
|
|
"str %1, [%0]\n"
|
|
"mov %1, #0xffffffff\n"
|
|
"str %1, [%0, #4]\n"
|
|
"moveq %1, #1\n"
|
|
"movne %1, #0\n"
|
|
: "+r" (ras_start), "=r" (done)
|
|
,"+r" (p), "+r" (cmpval), "+r" (newval) : : "cc", "memory");
|
|
return (done);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_add_32(volatile u_int32_t *p, u_int32_t val)
|
|
{
|
|
int start, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%2]\n"
|
|
"add %1, %1, %3\n"
|
|
"str %1, [%2]\n"
|
|
"2:\n"
|
|
"mov %1, #0\n"
|
|
"str %1, [%0]\n"
|
|
"mov %1, #0xffffffff\n"
|
|
"str %1, [%0, #4]\n"
|
|
: "+r" (ras_start), "=r" (start), "+r" (p), "+r" (val)
|
|
: : "memory");
|
|
}
|
|
|
|
static __inline void
|
|
atomic_subtract_32(volatile u_int32_t *p, u_int32_t val)
|
|
{
|
|
int start, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%2]\n"
|
|
"sub %1, %1, %3\n"
|
|
"str %1, [%2]\n"
|
|
"2:\n"
|
|
"mov %1, #0\n"
|
|
"str %1, [%0]\n"
|
|
"mov %1, #0xffffffff\n"
|
|
"str %1, [%0, #4]\n"
|
|
|
|
: "+r" (ras_start), "=r" (start), "+r" (p), "+r" (val)
|
|
: : "memory");
|
|
}
|
|
|
|
static __inline void
|
|
atomic_set_32(volatile uint32_t *address, uint32_t setmask)
|
|
{
|
|
int start, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%2]\n"
|
|
"orr %1, %1, %3\n"
|
|
"str %1, [%2]\n"
|
|
"2:\n"
|
|
"mov %1, #0\n"
|
|
"str %1, [%0]\n"
|
|
"mov %1, #0xffffffff\n"
|
|
"str %1, [%0, #4]\n"
|
|
|
|
: "+r" (ras_start), "=r" (start), "+r" (address), "+r" (setmask)
|
|
: : "memory");
|
|
}
|
|
|
|
static __inline void
|
|
atomic_clear_32(volatile uint32_t *address, uint32_t clearmask)
|
|
{
|
|
int start, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%2]\n"
|
|
"bic %1, %1, %3\n"
|
|
"str %1, [%2]\n"
|
|
"2:\n"
|
|
"mov %1, #0\n"
|
|
"str %1, [%0]\n"
|
|
"mov %1, #0xffffffff\n"
|
|
"str %1, [%0, #4]\n"
|
|
: "+r" (ras_start), "=r" (start), "+r" (address), "+r" (clearmask)
|
|
: : "memory");
|
|
|
|
}
|
|
|
|
static __inline uint32_t
|
|
atomic_fetchadd_32(volatile uint32_t *p, uint32_t v)
|
|
{
|
|
uint32_t start, tmp, ras_start = ARM_RAS_START;
|
|
|
|
__asm __volatile("1:\n"
|
|
"adr %1, 1b\n"
|
|
"str %1, [%0]\n"
|
|
"adr %1, 2f\n"
|
|
"str %1, [%0, #4]\n"
|
|
"ldr %1, [%3]\n"
|
|
"mov %2, %1\n"
|
|
"add %2, %2, %4\n"
|
|
"str %2, [%3]\n"
|
|
"2:\n"
|
|
"mov %2, #0\n"
|
|
"str %2, [%0]\n"
|
|
"mov %2, #0xffffffff\n"
|
|
"str %2, [%0, #4]\n"
|
|
: "+r" (ras_start), "=r" (start), "=r" (tmp), "+r" (p), "+r" (v)
|
|
: : "memory");
|
|
return (start);
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
|
|
static __inline uint32_t
|
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atomic_readandclear_32(volatile u_int32_t *p)
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{
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return (__swp(0, p));
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}
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#define atomic_cmpset_rel_32 atomic_cmpset_32
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#define atomic_cmpset_acq_32 atomic_cmpset_32
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#define atomic_set_rel_32 atomic_set_32
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#define atomic_set_acq_32 atomic_set_32
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#define atomic_clear_rel_32 atomic_clear_32
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#define atomic_clear_acq_32 atomic_clear_32
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#define atomic_add_rel_32 atomic_add_32
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#define atomic_add_acq_32 atomic_add_32
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#define atomic_subtract_rel_32 atomic_subtract_32
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#define atomic_subtract_acq_32 atomic_subtract_32
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#define atomic_store_rel_32 atomic_store_32
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#define atomic_store_rel_long atomic_store_long
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#define atomic_load_acq_32 atomic_load_32
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#define atomic_load_acq_long atomic_load_long
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#define atomic_add_acq_long atomic_add_long
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#define atomic_add_rel_long atomic_add_long
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#define atomic_subtract_acq_long atomic_subtract_long
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#define atomic_subtract_rel_long atomic_subtract_long
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#define atomic_clear_acq_long atomic_clear_long
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#define atomic_clear_rel_long atomic_clear_long
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#define atomic_set_acq_long atomic_set_long
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#define atomic_set_rel_long atomic_set_long
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#define atomic_cmpset_acq_long atomic_cmpset_long
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#define atomic_cmpset_rel_long atomic_cmpset_long
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#define atomic_load_acq_long atomic_load_long
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#undef __with_interrupts_disabled
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static __inline void
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atomic_add_long(volatile u_long *p, u_long v)
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{
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atomic_add_32((volatile uint32_t *)p, v);
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}
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static __inline void
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atomic_clear_long(volatile u_long *p, u_long v)
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{
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atomic_clear_32((volatile uint32_t *)p, v);
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}
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static __inline int
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atomic_cmpset_long(volatile u_long *dst, u_long old, u_long newe)
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{
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return (atomic_cmpset_32((volatile uint32_t *)dst, old, newe));
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}
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static __inline u_long
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atomic_fetchadd_long(volatile u_long *p, u_long v)
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{
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return (atomic_fetchadd_32((volatile uint32_t *)p, v));
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}
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static __inline void
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atomic_readandclear_long(volatile u_long *p)
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{
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atomic_readandclear_32((volatile uint32_t *)p);
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}
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static __inline void
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atomic_set_long(volatile u_long *p, u_long v)
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{
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atomic_set_32((volatile uint32_t *)p, v);
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}
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static __inline void
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atomic_subtract_long(volatile u_long *p, u_long v)
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{
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atomic_subtract_32((volatile uint32_t *)p, v);
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}
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#endif /* Arch >= v6 */
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static __inline int
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atomic_load_32(volatile uint32_t *v)
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{
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return (*v);
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}
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static __inline void
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atomic_store_32(volatile uint32_t *dst, uint32_t src)
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{
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*dst = src;
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}
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static __inline int
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atomic_load_long(volatile u_long *v)
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{
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return (*v);
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}
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static __inline void
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atomic_store_long(volatile u_long *dst, u_long src)
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{
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*dst = src;
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}
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#define atomic_clear_ptr atomic_clear_32
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#define atomic_set_ptr atomic_set_32
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#define atomic_cmpset_ptr atomic_cmpset_32
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#define atomic_cmpset_rel_ptr atomic_cmpset_rel_32
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#define atomic_cmpset_acq_ptr atomic_cmpset_acq_32
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#define atomic_store_ptr atomic_store_32
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#define atomic_store_rel_ptr atomic_store_rel_32
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|
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#define atomic_add_int atomic_add_32
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#define atomic_add_acq_int atomic_add_acq_32
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#define atomic_add_rel_int atomic_add_rel_32
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#define atomic_subtract_int atomic_subtract_32
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#define atomic_subtract_acq_int atomic_subtract_acq_32
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#define atomic_subtract_rel_int atomic_subtract_rel_32
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#define atomic_clear_int atomic_clear_32
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|
#define atomic_clear_acq_int atomic_clear_acq_32
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|
#define atomic_clear_rel_int atomic_clear_rel_32
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|
#define atomic_set_int atomic_set_32
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|
#define atomic_set_acq_int atomic_set_acq_32
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|
#define atomic_set_rel_int atomic_set_rel_32
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|
#define atomic_cmpset_int atomic_cmpset_32
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|
#define atomic_cmpset_acq_int atomic_cmpset_acq_32
|
|
#define atomic_cmpset_rel_int atomic_cmpset_rel_32
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|
#define atomic_fetchadd_int atomic_fetchadd_32
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#define atomic_readandclear_int atomic_readandclear_32
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#define atomic_load_acq_int atomic_load_acq_32
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#define atomic_store_rel_int atomic_store_rel_32
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#endif /* _MACHINE_ATOMIC_H_ */
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