Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/ck/include/gcc/aarch64/ck_pr.h
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1 /* 2 * Copyright 2009-2016 Samy Al Bahra. 3 * Copyright 2013-2016 Olivier Houchard. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef CK_PR_AARCH64_H 29 #define CK_PR_AARCH64_H 30 31 #ifndef CK_PR_H 32 #error Do not include this file directly, use ck_pr.h 33 #endif 34 35 #include <ck_cc.h> 36 #include <ck_md.h> 37 38 /* 39 * The following represent supported atomic operations. 40 * These operations may be emulated. 41 */ 42 #include "ck_f_pr.h" 43 44 /* 45 * Minimum interface requirement met. 46 */ 47 #define CK_F_PR 48 49 CK_CC_INLINE static void 50 ck_pr_stall(void) 51 { 52 53 __asm__ __volatile__("" ::: "memory"); 54 return; 55 } 56 57 #define CK_DMB_SY __asm __volatile("dmb ish" : : "r" (0) : "memory") 58 #define CK_DMB_LD __asm __volatile("dmb ishld" : : "r" (0) : "memory") 59 #define CK_DMB_ST __asm __volatile("dmb ishst" : : "r" (0) : "memory") 60 61 #define CK_PR_FENCE(T, I) \ 62 CK_CC_INLINE static void \ 63 ck_pr_fence_strict_##T(void) \ 64 { \ 65 I; \ 66 } 67 68 CK_PR_FENCE(atomic, CK_DMB_ST) 69 CK_PR_FENCE(atomic_store, CK_DMB_ST) 70 CK_PR_FENCE(atomic_load, CK_DMB_SY) 71 CK_PR_FENCE(store_atomic, CK_DMB_ST) 72 CK_PR_FENCE(load_atomic, CK_DMB_SY) 73 CK_PR_FENCE(store, CK_DMB_ST) 74 CK_PR_FENCE(store_load, CK_DMB_SY) 75 CK_PR_FENCE(load, CK_DMB_LD) 76 CK_PR_FENCE(load_store, CK_DMB_SY) 77 CK_PR_FENCE(memory, CK_DMB_SY) 78 CK_PR_FENCE(acquire, CK_DMB_SY) 79 CK_PR_FENCE(release, CK_DMB_SY) 80 CK_PR_FENCE(acqrel, CK_DMB_SY) 81 CK_PR_FENCE(lock, CK_DMB_SY) 82 CK_PR_FENCE(unlock, CK_DMB_SY) 83 84 #undef CK_PR_FENCE 85 86 #undef CK_DMB_SI 87 #undef CK_DMB_LD 88 #undef CK_DMB_ST 89 90 #define CK_PR_LOAD(S, M, T, I) \ 91 CK_CC_INLINE static T \ 92 ck_pr_md_load_##S(const M *target) \ 93 { \ 94 long r = 0; \ 95 __asm__ __volatile__(I " %w0, [%1]\n" \ 96 : "=r" (r) \ 97 : "r" (target) \ 98 : "memory"); \ 99 return ((T)r); \ 100 } 101 #define CK_PR_LOAD_64(S, M, T, I) \ 102 CK_CC_INLINE static T \ 103 ck_pr_md_load_##S(const M *target) \ 104 { \ 105 long r = 0; \ 106 __asm__ __volatile__(I " %0, [%1]\n" \ 107 : "=r" (r) \ 108 : "r" (target) \ 109 : "memory"); \ 110 return ((T)r); \ 111 } 112 113 114 CK_PR_LOAD_64(ptr, void, void *, "ldr") 115 116 #define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, I) 117 #define CK_PR_LOAD_S_64(S, T, I) CK_PR_LOAD_64(S, T, T, I) 118 119 CK_PR_LOAD_S_64(64, uint64_t, "ldr") 120 CK_PR_LOAD_S(32, uint32_t, "ldr") 121 CK_PR_LOAD_S(16, uint16_t, "ldrh") 122 CK_PR_LOAD_S(8, uint8_t, "ldrb") 123 CK_PR_LOAD_S(uint, unsigned int, "ldr") 124 CK_PR_LOAD_S(int, int, "ldr") 125 CK_PR_LOAD_S(short, short, "ldrh") 126 CK_PR_LOAD_S(char, char, "ldrb") 127 #ifndef CK_PR_DISABLE_DOUBLE 128 CK_PR_LOAD_S_64(double, double, "ldr") 129 #endif 130 131 #undef CK_PR_LOAD_S 132 #undef CK_PR_LOAD_S_64 133 #undef CK_PR_LOAD 134 #undef CK_PR_LAOD_64 135 136 #define CK_PR_STORE(S, M, T, I) \ 137 CK_CC_INLINE static void \ 138 ck_pr_md_store_##S(M *target, T v) \ 139 { \ 140 __asm__ __volatile__(I " %w1, [%0]" \ 141 : \ 142 : "r" (target), \ 143 "r" (v) \ 144 : "memory"); \ 145 return; \ 146 } 147 #define CK_PR_STORE_64(S, M, T, I) \ 148 CK_CC_INLINE static void \ 149 ck_pr_md_store_##S(M *target, T v) \ 150 { \ 151 __asm__ __volatile__(I " %1, [%0]" \ 152 : \ 153 : "r" (target), \ 154 "r" (v) \ 155 : "memory"); \ 156 return; \ 157 } 158 159 CK_PR_STORE_64(ptr, void, const void *, "str") 160 161 #define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, I) 162 #define CK_PR_STORE_S_64(S, T, I) CK_PR_STORE_64(S, T, T, I) 163 164 CK_PR_STORE_S_64(64, uint64_t, "str") 165 CK_PR_STORE_S(32, uint32_t, "str") 166 CK_PR_STORE_S(16, uint16_t, "strh") 167 CK_PR_STORE_S(8, uint8_t, "strb") 168 CK_PR_STORE_S(uint, unsigned int, "str") 169 CK_PR_STORE_S(int, int, "str") 170 CK_PR_STORE_S(short, short, "strh") 171 CK_PR_STORE_S(char, char, "strb") 172 #ifndef CK_PR_DISABLE_DOUBLE 173 CK_PR_STORE_S_64(double, double, "str") 174 #endif 175 176 #undef CK_PR_STORE_S 177 #undef CK_PR_STORE_S_64 178 #undef CK_PR_STORE 179 #undef CK_PR_STORE_64 180 181 #ifdef CK_MD_LSE_ENABLE 182 #include "ck_pr_lse.h" 183 #else 184 #include "ck_pr_llsc.h" 185 #endif 186 187 /* 188 * ck_pr_neg_*() functions can only be implemented via LL/SC, as there are no 189 * LSE alternatives. 190 */ 191 #define CK_PR_NEG(N, M, T, W, R) \ 192 CK_CC_INLINE static void \ 193 ck_pr_neg_##N(M *target) \ 194 { \ 195 T previous = 0; \ 196 T tmp = 0; \ 197 __asm__ __volatile__("1:" \ 198 "ldxr" W " %" R "0, [%2]\n"\ 199 "neg %" R "0, %" R "\n" \ 200 "stxr" W " %w1, %" R "0, [%2]\n" \ 201 "cbnz %w1, 1b\n" \ 202 : "=&r" (previous), \ 203 "=&r" (tmp) \ 204 : "r" (target) \ 205 : "memory", "cc"); \ 206 return; \ 207 } 208 209 CK_PR_NEG(ptr, void, void *, "", "") 210 CK_PR_NEG(64, uint64_t, uint64_t, "", "") 211 212 #define CK_PR_NEG_S(S, T, W) \ 213 CK_PR_NEG(S, T, T, W, "w") \ 214 215 CK_PR_NEG_S(32, uint32_t, "") 216 CK_PR_NEG_S(uint, unsigned int, "") 217 CK_PR_NEG_S(int, int, "") 218 CK_PR_NEG_S(16, uint16_t, "h") 219 CK_PR_NEG_S(8, uint8_t, "b") 220 CK_PR_NEG_S(short, short, "h") 221 CK_PR_NEG_S(char, char, "b") 222 223 #undef CK_PR_NEG_S 224 #undef CK_PR_NEG 225 226 #endif /* CK_PR_AARCH64_H */ 227
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