| 1 | /* |
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| 2 | * Copyright 2009-2015 Samy Al Bahra. |
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| 3 | * Copyright 2013-2015 Olivier Houchard. |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * 1. Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * |
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| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 25 | * SUCH DAMAGE. |
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| 26 | */ |
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| 27 | |
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| 28 | #ifndef CK_PR_ARM_H |
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| 29 | #define CK_PR_ARM_H |
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| 30 | |
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| 31 | #ifndef CK_PR_H |
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| 32 | #error Do not include this file directly, use ck_pr.h |
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| 33 | #endif |
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| 34 | |
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| 35 | #include <ck_cc.h> |
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| 36 | #include <ck_md.h> |
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| 37 | |
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| 38 | /* |
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| 39 | * The following represent supported atomic operations. |
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| 40 | * These operations may be emulated. |
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| 41 | */ |
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| 42 | #include "ck_f_pr.h" |
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| 43 | |
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| 44 | /* |
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| 45 | * Minimum interface requirement met. |
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| 46 | */ |
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| 47 | #define CK_F_PR |
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| 48 | |
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| 49 | CK_CC_INLINE static void |
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| 50 | ck_pr_stall(void) |
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| 51 | { |
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| 52 | |
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| 53 | __asm__ __volatile__("" ::: "memory"); |
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| 54 | return; |
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| 55 | } |
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| 56 | |
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| 57 | #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) |
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| 58 | #define CK_ISB __asm __volatile("isb" : : "r" (0) : "memory") |
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| 59 | #define CK_DMB __asm __volatile("dmb" : : "r" (0) : "memory") |
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| 60 | #define CK_DSB __asm __volatile("dsb" : : "r" (0) : "memory") |
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| 61 | /* FreeBSD's toolchain doesn't accept dmb st, so use the opcode instead */ |
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| 62 | #if defined(__FreeBSD__) && !defined(__rtems__) |
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| 63 | #define CK_DMB_ST __asm __volatile(".word 0xf57ff05e" : : "r" (0) : "memory") |
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| 64 | #else |
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| 65 | #define CK_DMB_ST __asm __volatile("dmb st" : : "r" (0) : "memory") |
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| 66 | #endif /* __FreeBSD__ */ |
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| 67 | #else |
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| 68 | /* armv6 doesn't have dsb/dmb/isb, and no way to wait only for stores */ |
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| 69 | #define CK_ISB \ |
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| 70 | __asm __volatile("mcr p15, 0, %0, c7, c5, 4" : : "r" (0) : "memory") |
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| 71 | #define CK_DSB \ |
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| 72 | __asm __volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0) : "memory") |
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| 73 | #define CK_DMB \ |
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| 74 | __asm __volatile("mcr p15, 0, %0, c7, c10, 5" : : "r" (0) : "memory") |
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| 75 | #define CK_DMB_ST CK_DMB |
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| 76 | #endif |
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| 77 | |
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| 78 | #define CK_PR_FENCE(T, I) \ |
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| 79 | CK_CC_INLINE static void \ |
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| 80 | ck_pr_fence_strict_##T(void) \ |
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| 81 | { \ |
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| 82 | I; \ |
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| 83 | } |
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| 84 | |
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| 85 | CK_PR_FENCE(atomic, CK_DMB_ST) |
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| 86 | CK_PR_FENCE(atomic_store, CK_DMB_ST) |
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| 87 | CK_PR_FENCE(atomic_load, CK_DMB_ST) |
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| 88 | CK_PR_FENCE(store_atomic, CK_DMB_ST) |
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| 89 | CK_PR_FENCE(load_atomic, CK_DMB) |
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| 90 | CK_PR_FENCE(store, CK_DMB_ST) |
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| 91 | CK_PR_FENCE(store_load, CK_DMB) |
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| 92 | CK_PR_FENCE(load, CK_DMB) |
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| 93 | CK_PR_FENCE(load_store, CK_DMB) |
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| 94 | CK_PR_FENCE(memory, CK_DMB) |
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| 95 | CK_PR_FENCE(acquire, CK_DMB) |
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| 96 | CK_PR_FENCE(release, CK_DMB) |
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| 97 | CK_PR_FENCE(acqrel, CK_DMB) |
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| 98 | CK_PR_FENCE(lock, CK_DMB) |
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| 99 | CK_PR_FENCE(unlock, CK_DMB) |
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| 100 | |
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| 101 | #undef CK_PR_FENCE |
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| 102 | |
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| 103 | #undef CK_ISB |
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| 104 | #undef CK_DSB |
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| 105 | #undef CK_DMB |
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| 106 | #undef CK_DMB_ST |
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| 107 | |
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| 108 | #define CK_PR_LOAD(S, M, T, C, I) \ |
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| 109 | CK_CC_INLINE static T \ |
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| 110 | ck_pr_md_load_##S(const M *target) \ |
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| 111 | { \ |
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| 112 | long r = 0; \ |
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| 113 | __asm__ __volatile__(I " %0, [%1];" \ |
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| 114 | : "=r" (r) \ |
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| 115 | : "r" (target) \ |
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| 116 | : "memory"); \ |
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| 117 | return ((T)r); \ |
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| 118 | } |
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| 119 | |
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| 120 | CK_PR_LOAD(ptr, void, void *, uint32_t, "ldr") |
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| 121 | |
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| 122 | #define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, T, I) |
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| 123 | |
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| 124 | CK_PR_LOAD_S(32, uint32_t, "ldr") |
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| 125 | CK_PR_LOAD_S(16, uint16_t, "ldrh") |
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| 126 | CK_PR_LOAD_S(8, uint8_t, "ldrb") |
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| 127 | CK_PR_LOAD_S(uint, unsigned int, "ldr") |
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| 128 | CK_PR_LOAD_S(int, int, "ldr") |
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| 129 | CK_PR_LOAD_S(short, short, "ldrh") |
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| 130 | CK_PR_LOAD_S(char, char, "ldrb") |
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| 131 | |
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| 132 | #undef CK_PR_LOAD_S |
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| 133 | #undef CK_PR_LOAD |
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| 134 | |
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| 135 | #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) |
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| 136 | |
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| 137 | #define CK_PR_DOUBLE_LOAD(T, N) \ |
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| 138 | CK_CC_INLINE static T \ |
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| 139 | ck_pr_md_load_##N(const T *target) \ |
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| 140 | { \ |
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| 141 | register T ret; \ |
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| 142 | \ |
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| 143 | __asm __volatile("ldrexd %0, [%1]" \ |
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| 144 | : "=&r" (ret) \ |
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| 145 | : "r" (target) \ |
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| 146 | : "memory", "cc"); \ |
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| 147 | return (ret); \ |
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| 148 | } |
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| 149 | |
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| 150 | CK_PR_DOUBLE_LOAD(uint64_t, 64) |
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| 151 | #ifndef CK_PR_DISABLE_DOUBLE |
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| 152 | CK_PR_DOUBLE_LOAD(double, double) |
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| 153 | #endif |
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| 154 | #undef CK_PR_DOUBLE_LOAD |
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| 155 | #endif |
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| 156 | |
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| 157 | #define CK_PR_STORE(S, M, T, C, I) \ |
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| 158 | CK_CC_INLINE static void \ |
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| 159 | ck_pr_md_store_##S(M *target, T v) \ |
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| 160 | { \ |
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| 161 | __asm__ __volatile__(I " %1, [%0]" \ |
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| 162 | : \ |
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| 163 | : "r" (target), \ |
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| 164 | "r" (v) \ |
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| 165 | : "memory"); \ |
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| 166 | return; \ |
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| 167 | } |
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| 168 | |
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| 169 | CK_PR_STORE(ptr, void, const void *, uint32_t, "str") |
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| 170 | |
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| 171 | #define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, T, I) |
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| 172 | |
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| 173 | CK_PR_STORE_S(32, uint32_t, "str") |
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| 174 | CK_PR_STORE_S(16, uint16_t, "strh") |
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| 175 | CK_PR_STORE_S(8, uint8_t, "strb") |
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| 176 | CK_PR_STORE_S(uint, unsigned int, "str") |
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| 177 | CK_PR_STORE_S(int, int, "str") |
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| 178 | CK_PR_STORE_S(short, short, "strh") |
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| 179 | CK_PR_STORE_S(char, char, "strb") |
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| 180 | |
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| 181 | #undef CK_PR_STORE_S |
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| 182 | #undef CK_PR_STORE |
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| 183 | |
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| 184 | #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) |
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| 185 | |
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| 186 | #define CK_PR_DOUBLE_STORE(T, N) \ |
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| 187 | CK_CC_INLINE static void \ |
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| 188 | ck_pr_md_store_##N(const T *target, T value) \ |
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| 189 | { \ |
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| 190 | T tmp; \ |
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| 191 | uint32_t flag; \ |
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| 192 | __asm __volatile("1: \n" \ |
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| 193 | "ldrexd %0, [%2]\n" \ |
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| 194 | "strexd %1, %3, [%2]\n" \ |
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| 195 | "teq %1, #0\n" \ |
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| 196 | "it ne \n" \ |
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| 197 | "bne 1b\n" \ |
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| 198 | : "=&r" (tmp), "=&r" (flag) \ |
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| 199 | : "r" (target), "r" (value) \ |
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| 200 | : "memory", "cc"); \ |
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| 201 | } |
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| 202 | |
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| 203 | CK_PR_DOUBLE_STORE(uint64_t, 64) |
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| 204 | #ifndef CK_PR_DISABLE_DOUBLE |
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| 205 | CK_PR_DOUBLE_STORE(double, double) |
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| 206 | #endif |
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| 207 | |
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| 208 | #undef CK_PR_DOUBLE_STORE |
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| 209 | |
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| 210 | #define CK_PR_DOUBLE_CAS_VALUE(T, N) \ |
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| 211 | CK_CC_INLINE static bool \ |
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| 212 | ck_pr_cas_##N##_value(T *target, T compare, T set, T *value) \ |
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| 213 | { \ |
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| 214 | T previous; \ |
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| 215 | int tmp; \ |
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| 216 | \ |
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| 217 | __asm__ __volatile__("1:" \ |
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| 218 | "ldrexd %0, [%4];" \ |
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| 219 | "cmp %Q0, %Q2;" \ |
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| 220 | "ittt eq;" \ |
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| 221 | "cmpeq %R0, %R2;" \ |
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| 222 | "strexdeq %1, %3, [%4];" \ |
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| 223 | "cmpeq %1, #1;" \ |
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| 224 | "beq 1b;" \ |
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| 225 | :"=&r" (previous), "=&r" (tmp) \ |
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| 226 | : "r" (compare), "r" (set) , \ |
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| 227 | "r"(target) \ |
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| 228 | : "memory", "cc"); \ |
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| 229 | *value = previous; \ |
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| 230 | return (*value == compare); \ |
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| 231 | } |
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| 232 | |
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| 233 | CK_PR_DOUBLE_CAS_VALUE(uint64_t, 64) |
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| 234 | #ifndef CK_PR_DISABLE_DOUBLE |
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| 235 | CK_PR_DOUBLE_CAS_VALUE(double, double) |
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| 236 | #endif |
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| 237 | |
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| 238 | #undef CK_PR_DOUBLE_CAS_VALUE |
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| 239 | |
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| 240 | CK_CC_INLINE static bool |
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| 241 | ck_pr_cas_ptr_2_value(void *target, void *compare, void *set, void *value) |
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| 242 | { |
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| 243 | uint32_t *_compare = CK_CPP_CAST(uint32_t *, compare); |
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| 244 | uint32_t *_set = CK_CPP_CAST(uint32_t *, set); |
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| 245 | uint64_t __compare = ((uint64_t)_compare[0]) | ((uint64_t)_compare[1] << 32); |
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| 246 | uint64_t __set = ((uint64_t)_set[0]) | ((uint64_t)_set[1] << 32); |
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| 247 | |
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| 248 | return (ck_pr_cas_64_value(CK_CPP_CAST(uint64_t *, target), |
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| 249 | __compare, |
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| 250 | __set, |
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| 251 | CK_CPP_CAST(uint64_t *, value))); |
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| 252 | } |
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| 253 | |
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| 254 | #define CK_PR_DOUBLE_CAS(T, N) \ |
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| 255 | CK_CC_INLINE static bool \ |
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| 256 | ck_pr_cas_##N(T *target, T compare, T set) \ |
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| 257 | { \ |
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| 258 | int ret; \ |
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| 259 | T tmp; \ |
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| 260 | \ |
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| 261 | __asm__ __volatile__("1:" \ |
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| 262 | "mov %0, #0;" \ |
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| 263 | "ldrexd %1, [%4];" \ |
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| 264 | "cmp %Q1, %Q2;" \ |
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| 265 | "itttt eq;" \ |
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| 266 | "cmpeq %R1, %R2;" \ |
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| 267 | "strexdeq %1, %3, [%4];" \ |
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| 268 | "moveq %0, #1;" \ |
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| 269 | "cmpeq %1, #1;" \ |
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| 270 | "beq 1b;" \ |
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| 271 | : "=&r" (ret), "=&r" (tmp) \ |
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| 272 | : "r" (compare), "r" (set) , \ |
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| 273 | "r"(target) \ |
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| 274 | : "memory", "cc"); \ |
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| 275 | \ |
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| 276 | return (ret); \ |
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| 277 | } |
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| 278 | |
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| 279 | CK_PR_DOUBLE_CAS(uint64_t, 64) |
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| 280 | #ifndef CK_PR_DISABLE_DOUBLE |
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| 281 | CK_PR_DOUBLE_CAS(double, double) |
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| 282 | #endif |
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| 283 | |
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| 284 | CK_CC_INLINE static bool |
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| 285 | ck_pr_cas_ptr_2(void *target, void *compare, void *set) |
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| 286 | { |
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| 287 | uint32_t *_compare = CK_CPP_CAST(uint32_t *, compare); |
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| 288 | uint32_t *_set = CK_CPP_CAST(uint32_t *, set); |
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| 289 | uint64_t __compare = ((uint64_t)_compare[0]) | ((uint64_t)_compare[1] << 32); |
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| 290 | uint64_t __set = ((uint64_t)_set[0]) | ((uint64_t)_set[1] << 32); |
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| 291 | return (ck_pr_cas_64(CK_CPP_CAST(uint64_t *, target), |
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| 292 | __compare, |
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| 293 | __set)); |
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| 294 | } |
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| 295 | |
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| 296 | #endif |
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| 297 | |
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| 298 | CK_CC_INLINE static bool |
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| 299 | ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *value) |
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| 300 | { |
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| 301 | void *previous, *tmp; |
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| 302 | __asm__ __volatile__("1:" |
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| 303 | "ldrex %0, [%2];" |
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| 304 | "cmp %0, %4;" |
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| 305 | "itt eq;" |
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| 306 | "strexeq %1, %3, [%2];" |
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| 307 | "cmpeq %1, #1;" |
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| 308 | "beq 1b;" |
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| 309 | : "=&r" (previous), |
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| 310 | "=&r" (tmp) |
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| 311 | : "r" (target), |
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| 312 | "r" (set), |
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| 313 | "r" (compare) |
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| 314 | : "memory", "cc"); |
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| 315 | *(void **)value = previous; |
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| 316 | return (previous == compare); |
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| 317 | } |
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| 318 | |
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| 319 | CK_CC_INLINE static bool |
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| 320 | ck_pr_cas_ptr(void *target, void *compare, void *set) |
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| 321 | { |
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| 322 | void *previous, *tmp; |
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| 323 | __asm__ __volatile__("1:" |
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| 324 | "ldrex %0, [%2];" |
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| 325 | "cmp %0, %4;" |
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| 326 | "itt eq;" |
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| 327 | "strexeq %1, %3, [%2];" |
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| 328 | "cmpeq %1, #1;" |
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| 329 | "beq 1b;" |
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| 330 | : "=&r" (previous), |
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| 331 | "=&r" (tmp) |
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| 332 | : "r" (target), |
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| 333 | "r" (set), |
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| 334 | "r" (compare) |
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| 335 | : "memory", "cc"); |
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| 336 | return (previous == compare); |
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| 337 | } |
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| 338 | |
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| 339 | #define CK_PR_CAS(N, T, W) \ |
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| 340 | CK_CC_INLINE static bool \ |
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| 341 | ck_pr_cas_##N##_value(T *target, T compare, T set, T *value) \ |
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| 342 | { \ |
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| 343 | T previous = 0, tmp = 0; \ |
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| 344 | __asm__ __volatile__("1:" \ |
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| 345 | "ldrex" W " %0, [%2];" \ |
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| 346 | "cmp %0, %4;" \ |
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| 347 | "itt eq;" \ |
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| 348 | "strex" W "eq %1, %3, [%2];" \ |
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| 349 | "cmpeq %1, #1;" \ |
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| 350 | "beq 1b;" \ |
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| 351 | /* \ |
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| 352 | * Using "+&" instead of "=&" to avoid bogus \ |
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| 353 | * clang warnings. \ |
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| 354 | */ \ |
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| 355 | : "+&r" (previous), \ |
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| 356 | "+&r" (tmp) \ |
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| 357 | : "r" (target), \ |
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| 358 | "r" (set), \ |
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| 359 | "r" (compare) \ |
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| 360 | : "memory", "cc"); \ |
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| 361 | *value = previous; \ |
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| 362 | return (previous == compare); \ |
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| 363 | } \ |
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| 364 | CK_CC_INLINE static bool \ |
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| 365 | ck_pr_cas_##N(T *target, T compare, T set) \ |
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| 366 | { \ |
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| 367 | T previous = 0, tmp = 0; \ |
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| 368 | __asm__ __volatile__("1:" \ |
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| 369 | "ldrex" W " %0, [%2];" \ |
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| 370 | "cmp %0, %4;" \ |
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| 371 | "itt eq;" \ |
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| 372 | "strex" W "eq %1, %3, [%2];" \ |
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| 373 | "cmpeq %1, #1;" \ |
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| 374 | "beq 1b;" \ |
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| 375 | : "+&r" (previous), \ |
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| 376 | "+&r" (tmp) \ |
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| 377 | : "r" (target), \ |
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| 378 | "r" (set), \ |
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| 379 | "r" (compare) \ |
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| 380 | : "memory", "cc"); \ |
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| 381 | return (previous == compare); \ |
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| 382 | } |
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| 383 | |
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| 384 | CK_PR_CAS(32, uint32_t, "") |
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| 385 | CK_PR_CAS(uint, unsigned int, "") |
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| 386 | CK_PR_CAS(int, int, "") |
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| 387 | CK_PR_CAS(16, uint16_t, "h") |
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| 388 | CK_PR_CAS(8, uint8_t, "b") |
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| 389 | CK_PR_CAS(short, short, "h") |
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| 390 | CK_PR_CAS(char, char, "b") |
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| 391 | |
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| 392 | |
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| 393 | #undef CK_PR_CAS |
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| 394 | |
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| 395 | #define CK_PR_FAS(N, M, T, W) \ |
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| 396 | CK_CC_INLINE static T \ |
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| 397 | ck_pr_fas_##N(M *target, T v) \ |
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| 398 | { \ |
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| 399 | T previous = 0; \ |
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| 400 | T tmp = 0; \ |
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| 401 | __asm__ __volatile__("1:" \ |
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| 402 | "ldrex" W " %0, [%2];" \ |
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| 403 | "strex" W " %1, %3, [%2];" \ |
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| 404 | "cmp %1, #0;" \ |
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| 405 | "bne 1b;" \ |
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| 406 | : "+&r" (previous), \ |
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| 407 | "+&r" (tmp) \ |
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| 408 | : "r" (target), \ |
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| 409 | "r" (v) \ |
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| 410 | : "memory", "cc"); \ |
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| 411 | return (previous); \ |
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| 412 | } |
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| 413 | |
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| 414 | CK_PR_FAS(32, uint32_t, uint32_t, "") |
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| 415 | CK_PR_FAS(ptr, void, void *, "") |
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| 416 | CK_PR_FAS(int, int, int, "") |
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| 417 | CK_PR_FAS(uint, unsigned int, unsigned int, "") |
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| 418 | CK_PR_FAS(16, uint16_t, uint16_t, "h") |
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| 419 | CK_PR_FAS(8, uint8_t, uint8_t, "b") |
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| 420 | CK_PR_FAS(short, short, short, "h") |
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| 421 | CK_PR_FAS(char, char, char, "b") |
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| 422 | |
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| 423 | |
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| 424 | #undef CK_PR_FAS |
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| 425 | |
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| 426 | #define CK_PR_UNARY(O, N, M, T, I, W) \ |
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| 427 | CK_CC_INLINE static void \ |
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| 428 | ck_pr_##O##_##N(M *target) \ |
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| 429 | { \ |
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| 430 | T previous = 0; \ |
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| 431 | T tmp = 0; \ |
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| 432 | __asm__ __volatile__("1:" \ |
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| 433 | "ldrex" W " %0, [%2];" \ |
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| 434 | I ";" \ |
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| 435 | "strex" W " %1, %0, [%2];" \ |
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| 436 | "cmp %1, #0;" \ |
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| 437 | "bne 1b;" \ |
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| 438 | : "+&r" (previous), \ |
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| 439 | "+&r" (tmp) \ |
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| 440 | : "r" (target) \ |
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| 441 | : "memory", "cc"); \ |
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| 442 | return; \ |
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| 443 | } |
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| 444 | |
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| 445 | CK_PR_UNARY(inc, ptr, void, void *, "add %0, %0, #1", "") |
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| 446 | CK_PR_UNARY(dec, ptr, void, void *, "sub %0, %0, #1", "") |
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| 447 | CK_PR_UNARY(not, ptr, void, void *, "mvn %0, %0", "") |
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| 448 | CK_PR_UNARY(neg, ptr, void, void *, "neg %0, %0", "") |
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| 449 | |
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| 450 | #define CK_PR_UNARY_S(S, T, W) \ |
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| 451 | CK_PR_UNARY(inc, S, T, T, "add %0, %0, #1", W) \ |
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| 452 | CK_PR_UNARY(dec, S, T, T, "sub %0, %0, #1", W) \ |
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| 453 | CK_PR_UNARY(not, S, T, T, "mvn %0, %0", W) \ |
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| 454 | CK_PR_UNARY(neg, S, T, T, "neg %0, %0", W) \ |
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| 455 | |
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| 456 | CK_PR_UNARY_S(32, uint32_t, "") |
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| 457 | CK_PR_UNARY_S(uint, unsigned int, "") |
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| 458 | CK_PR_UNARY_S(int, int, "") |
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| 459 | CK_PR_UNARY_S(16, uint16_t, "h") |
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| 460 | CK_PR_UNARY_S(8, uint8_t, "b") |
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| 461 | CK_PR_UNARY_S(short, short, "h") |
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| 462 | CK_PR_UNARY_S(char, char, "b") |
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| 463 | |
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| 464 | #undef CK_PR_UNARY_S |
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| 465 | #undef CK_PR_UNARY |
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| 466 | |
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| 467 | #define CK_PR_BINARY(O, N, M, T, I, W) \ |
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| 468 | CK_CC_INLINE static void \ |
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| 469 | ck_pr_##O##_##N(M *target, T delta) \ |
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| 470 | { \ |
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| 471 | T previous = 0; \ |
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| 472 | T tmp = 0; \ |
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| 473 | __asm__ __volatile__("1:" \ |
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| 474 | "ldrex" W " %0, [%2];" \ |
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| 475 | I " %0, %0, %3;" \ |
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| 476 | "strex" W " %1, %0, [%2];" \ |
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| 477 | "cmp %1, #0;" \ |
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| 478 | "bne 1b;" \ |
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| 479 | : "+&r" (previous), \ |
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| 480 | "+&r" (tmp) \ |
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| 481 | : "r" (target), \ |
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| 482 | "r" (delta) \ |
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| 483 | : "memory", "cc"); \ |
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| 484 | return; \ |
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| 485 | } |
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| 486 | |
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| 487 | CK_PR_BINARY(and, ptr, void, uintptr_t, "and", "") |
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| 488 | CK_PR_BINARY(add, ptr, void, uintptr_t, "add", "") |
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| 489 | CK_PR_BINARY(or, ptr, void, uintptr_t, "orr", "") |
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| 490 | CK_PR_BINARY(sub, ptr, void, uintptr_t, "sub", "") |
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| 491 | CK_PR_BINARY(xor, ptr, void, uintptr_t, "eor", "") |
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| 492 | |
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| 493 | #define CK_PR_BINARY_S(S, T, W) \ |
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| 494 | CK_PR_BINARY(and, S, T, T, "and", W) \ |
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| 495 | CK_PR_BINARY(add, S, T, T, "add", W) \ |
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| 496 | CK_PR_BINARY(or, S, T, T, "orr", W) \ |
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| 497 | CK_PR_BINARY(sub, S, T, T, "sub", W) \ |
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| 498 | CK_PR_BINARY(xor, S, T, T, "eor", W) |
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| 499 | |
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| 500 | CK_PR_BINARY_S(32, uint32_t, "") |
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| 501 | CK_PR_BINARY_S(uint, unsigned int, "") |
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| 502 | CK_PR_BINARY_S(int, int, "") |
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| 503 | CK_PR_BINARY_S(16, uint16_t, "h") |
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| 504 | CK_PR_BINARY_S(8, uint8_t, "b") |
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| 505 | CK_PR_BINARY_S(short, short, "h") |
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| 506 | CK_PR_BINARY_S(char, char, "b") |
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| 507 | |
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| 508 | #undef CK_PR_BINARY_S |
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| 509 | #undef CK_PR_BINARY |
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| 510 | |
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| 511 | CK_CC_INLINE static void * |
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| 512 | ck_pr_faa_ptr(void *target, uintptr_t delta) |
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| 513 | { |
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| 514 | uintptr_t previous, r, tmp; |
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| 515 | |
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| 516 | __asm__ __volatile__("1:" |
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| 517 | "ldrex %0, [%3];" |
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| 518 | "add %1, %4, %0;" |
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| 519 | "strex %2, %1, [%3];" |
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| 520 | "cmp %2, #0;" |
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| 521 | "bne 1b;" |
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| 522 | : "=&r" (previous), |
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| 523 | "=&r" (r), |
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| 524 | "=&r" (tmp) |
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| 525 | : "r" (target), |
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| 526 | "r" (delta) |
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| 527 | : "memory", "cc"); |
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| 528 | |
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| 529 | return (void *)(previous); |
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| 530 | } |
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| 531 | |
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| 532 | #define CK_PR_FAA(S, T, W) \ |
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| 533 | CK_CC_INLINE static T \ |
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| 534 | ck_pr_faa_##S(T *target, T delta) \ |
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| 535 | { \ |
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| 536 | T previous = 0, r = 0, tmp = 0; \ |
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| 537 | __asm__ __volatile__("1:" \ |
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| 538 | "ldrex" W " %0, [%3];" \ |
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| 539 | "add %1, %4, %0;" \ |
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| 540 | "strex" W " %2, %1, [%3];" \ |
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| 541 | "cmp %2, #0;" \ |
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| 542 | "bne 1b;" \ |
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| 543 | : "+&r" (previous), \ |
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| 544 | "+&r" (r), \ |
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| 545 | "+&r" (tmp) \ |
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| 546 | : "r" (target), \ |
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| 547 | "r" (delta) \ |
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| 548 | : "memory", "cc"); \ |
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| 549 | return (previous); \ |
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| 550 | } |
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| 551 | |
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| 552 | CK_PR_FAA(32, uint32_t, "") |
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| 553 | CK_PR_FAA(uint, unsigned int, "") |
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| 554 | CK_PR_FAA(int, int, "") |
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| 555 | CK_PR_FAA(16, uint16_t, "h") |
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| 556 | CK_PR_FAA(8, uint8_t, "b") |
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| 557 | CK_PR_FAA(short, short, "h") |
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| 558 | CK_PR_FAA(char, char, "b") |
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| 559 | |
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| 560 | #undef CK_PR_FAA |
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| 561 | |
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| 562 | #endif /* CK_PR_ARM_H */ |
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| 563 | |
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