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/*
* Copyright 2009-2016 Samy Al Bahra.
* Copyright 2013-2016 Olivier Houchard.
* All rights reserved.
*
* 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 CK_PR_AARCH64_H
#define CK_PR_AARCH64_H
#ifndef CK_PR_H
#error Do not include this file directly, use ck_pr.h
#endif
#include <ck_cc.h>
#include <ck_md.h>
/*
* The following represent supported atomic operations.
* These operations may be emulated.
*/
#include "ck_f_pr.h"
/*
* Minimum interface requirement met.
*/
#define CK_F_PR
CK_CC_INLINE static void
ck_pr_stall(void)
{
__asm__ __volatile__("" ::: "memory");
return;
}
#define CK_DMB_SY __asm __volatile("dmb ish" : : "r" (0) : "memory")
#define CK_DMB_LD __asm __volatile("dmb ishld" : : "r" (0) : "memory")
#define CK_DMB_ST __asm __volatile("dmb ishst" : : "r" (0) : "memory")
#define CK_PR_FENCE(T, I) \
CK_CC_INLINE static void \
ck_pr_fence_strict_##T(void) \
{ \
I; \
}
CK_PR_FENCE(atomic, CK_DMB_ST)
CK_PR_FENCE(atomic_store, CK_DMB_ST)
CK_PR_FENCE(atomic_load, CK_DMB_SY)
CK_PR_FENCE(store_atomic, CK_DMB_ST)
CK_PR_FENCE(load_atomic, CK_DMB_SY)
CK_PR_FENCE(store, CK_DMB_ST)
CK_PR_FENCE(store_load, CK_DMB_SY)
CK_PR_FENCE(load, CK_DMB_LD)
CK_PR_FENCE(load_store, CK_DMB_SY)
CK_PR_FENCE(memory, CK_DMB_SY)
CK_PR_FENCE(acquire, CK_DMB_SY)
CK_PR_FENCE(release, CK_DMB_SY)
CK_PR_FENCE(acqrel, CK_DMB_SY)
CK_PR_FENCE(lock, CK_DMB_SY)
CK_PR_FENCE(unlock, CK_DMB_SY)
#undef CK_PR_FENCE
#undef CK_DMB_SI
#undef CK_DMB_LD
#undef CK_DMB_ST
#define CK_PR_LOAD(S, M, T, I) \
CK_CC_INLINE static T \
ck_pr_md_load_##S(const M *target) \
{ \
long r = 0; \
__asm__ __volatile__(I " %w0, [%1]\n" \
: "=r" (r) \
: "r" (target) \
: "memory"); \
return ((T)r); \
}
#define CK_PR_LOAD_64(S, M, T, I) \
CK_CC_INLINE static T \
ck_pr_md_load_##S(const M *target) \
{ \
long r = 0; \
__asm__ __volatile__(I " %0, [%1]\n" \
: "=r" (r) \
: "r" (target) \
: "memory"); \
return ((T)r); \
}
CK_PR_LOAD_64(ptr, void, void *, "ldr")
#define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, I)
#define CK_PR_LOAD_S_64(S, T, I) CK_PR_LOAD_64(S, T, T, I)
CK_PR_LOAD_S_64(64, uint64_t, "ldr")
CK_PR_LOAD_S(32, uint32_t, "ldr")
CK_PR_LOAD_S(16, uint16_t, "ldrh")
CK_PR_LOAD_S(8, uint8_t, "ldrb")
CK_PR_LOAD_S(uint, unsigned int, "ldr")
CK_PR_LOAD_S(int, int, "ldr")
CK_PR_LOAD_S(short, short, "ldrh")
CK_PR_LOAD_S(char, char, "ldrb")
#ifndef CK_PR_DISABLE_DOUBLE
CK_PR_LOAD_S_64(double, double, "ldr")
#endif
#undef CK_PR_LOAD_S
#undef CK_PR_LOAD_S_64
#undef CK_PR_LOAD
#undef CK_PR_LAOD_64
#define CK_PR_STORE(S, M, T, I) \
CK_CC_INLINE static void \
ck_pr_md_store_##S(M *target, T v) \
{ \
__asm__ __volatile__(I " %w1, [%0]" \
: \
: "r" (target), \
"r" (v) \
: "memory"); \
return; \
}
#define CK_PR_STORE_64(S, M, T, I) \
CK_CC_INLINE static void \
ck_pr_md_store_##S(M *target, T v) \
{ \
__asm__ __volatile__(I " %1, [%0]" \
: \
: "r" (target), \
"r" (v) \
: "memory"); \
return; \
}
CK_PR_STORE_64(ptr, void, const void *, "str")
#define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, I)
#define CK_PR_STORE_S_64(S, T, I) CK_PR_STORE_64(S, T, T, I)
CK_PR_STORE_S_64(64, uint64_t, "str")
CK_PR_STORE_S(32, uint32_t, "str")
CK_PR_STORE_S(16, uint16_t, "strh")
CK_PR_STORE_S(8, uint8_t, "strb")
CK_PR_STORE_S(uint, unsigned int, "str")
CK_PR_STORE_S(int, int, "str")
CK_PR_STORE_S(short, short, "strh")
CK_PR_STORE_S(char, char, "strb")
#ifndef CK_PR_DISABLE_DOUBLE
CK_PR_STORE_S_64(double, double, "str")
#endif
#undef CK_PR_STORE_S
#undef CK_PR_STORE_S_64
#undef CK_PR_STORE
#undef CK_PR_STORE_64
#ifdef CK_MD_LSE_ENABLE
#include "ck_pr_lse.h"
#else
#include "ck_pr_llsc.h"
#endif
/*
* ck_pr_neg_*() functions can only be implemented via LL/SC, as there are no
* LSE alternatives.
*/
#define CK_PR_NEG(N, M, T, W, R) \
CK_CC_INLINE static void \
ck_pr_neg_##N(M *target) \
{ \
T previous = 0; \
T tmp = 0; \
__asm__ __volatile__("1:" \
"ldxr" W " %" R "0, [%2]\n"\
"neg %" R "0, %" R "0\n" \
"stxr" W " %w1, %" R "0, [%2]\n" \
"cbnz %w1, 1b\n" \
: "=&r" (previous), \
"=&r" (tmp) \
: "r" (target) \
: "memory", "cc"); \
return; \
}
CK_PR_NEG(ptr, void, void *, "", "")
CK_PR_NEG(64, uint64_t, uint64_t, "", "")
#define CK_PR_NEG_S(S, T, W) \
CK_PR_NEG(S, T, T, W, "w") \
CK_PR_NEG_S(32, uint32_t, "")
CK_PR_NEG_S(uint, unsigned int, "")
CK_PR_NEG_S(int, int, "")
CK_PR_NEG_S(16, uint16_t, "h")
CK_PR_NEG_S(8, uint8_t, "b")
CK_PR_NEG_S(short, short, "h")
CK_PR_NEG_S(char, char, "b")
#undef CK_PR_NEG_S
#undef CK_PR_NEG
#endif /* CK_PR_AARCH64_H */
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