Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 1 | From 48ddf4fb999931942c359350fb31cd557514e1c6 Mon Sep 17 00:00:00 2001 |
| 2 | From: Chenxi Mao <maochenxi@eswin.com> |
| 3 | Date: Mon, 20 Apr 2020 15:27:22 +0800 |
| 4 | Subject: [PATCH 1/1] adb: Support riscv64 |
| 5 | |
| 6 | --- |
| 7 | include/cutils/atomic-inline.h | 2 + |
| 8 | include/cutils/atomic-riscv64.h | 156 ++++++++++++++++++++++++++++++++ |
| 9 | 2 files changed, 158 insertions(+) |
| 10 | create mode 100644 include/cutils/atomic-riscv64.h |
| 11 | |
| 12 | diff --git a/include/cutils/atomic-inline.h b/include/cutils/atomic-inline.h |
| 13 | index a31e913579..b5dc38209c 100644 |
| 14 | --- a/include/cutils/atomic-inline.h |
| 15 | +++ b/include/cutils/atomic-inline.h |
| 16 | @@ -55,6 +55,8 @@ extern "C" { |
| 17 | #include <cutils/atomic-mips64.h> |
| 18 | #elif defined(__mips__) |
| 19 | #include <cutils/atomic-mips.h> |
| 20 | +#elif defined(__riscv) && __riscv_xlen == 64 |
| 21 | +#include <cutils/atomic-riscv64.h> |
| 22 | #else |
| 23 | #error atomic operations are unsupported |
| 24 | #endif |
| 25 | diff --git a/include/cutils/atomic-riscv64.h b/include/cutils/atomic-riscv64.h |
| 26 | new file mode 100644 |
| 27 | index 0000000000..2664db5a86 |
| 28 | --- /dev/null |
| 29 | +++ b/include/cutils/atomic-riscv64.h |
| 30 | @@ -0,0 +1,156 @@ |
| 31 | +/* |
| 32 | + * Copyright (C) 2014 The Android Open Source Project |
| 33 | + * All rights reserved. |
| 34 | + * |
| 35 | + * Redistribution and use in source and binary forms, with or without |
| 36 | + * modification, are permitted provided that the following conditions |
| 37 | + * are met: |
| 38 | + * * Redistributions of source code must retain the above copyright |
| 39 | + * notice, this list of conditions and the following disclaimer. |
| 40 | + * * Redistributions in binary form must reproduce the above copyright |
| 41 | + * notice, this list of conditions and the following disclaimer in |
| 42 | + * the documentation and/or other materials provided with the |
| 43 | + * distribution. |
| 44 | + * |
| 45 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 46 | + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 47 | + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 48 | + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 49 | + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 50 | + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 51 | + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 52 | + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 53 | + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 54 | + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 55 | + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 56 | + * SUCH DAMAGE. |
| 57 | + */ |
| 58 | + |
| 59 | +#ifndef ANDROID_CUTILS_ATOMIC_RISCV64_H |
| 60 | +#define ANDROID_CUTILS_ATOMIC_RISCV64_H |
| 61 | + |
| 62 | +#include <stdint.h> |
| 63 | + |
| 64 | +#ifndef ANDROID_ATOMIC_INLINE |
| 65 | +#define ANDROID_ATOMIC_INLINE inline __attribute__((always_inline)) |
| 66 | +#endif |
| 67 | + |
| 68 | +/* |
| 69 | + TODOAArch64: Revisit the below functions and check for potential |
| 70 | + optimizations using assembly code or otherwise. |
| 71 | +*/ |
| 72 | + |
| 73 | +extern ANDROID_ATOMIC_INLINE |
| 74 | +void android_compiler_barrier(void) |
| 75 | +{ |
| 76 | + __asm__ __volatile__ ("" : : : "memory"); |
| 77 | +} |
| 78 | + |
| 79 | +extern ANDROID_ATOMIC_INLINE |
| 80 | +void android_memory_barrier(void) |
| 81 | +{ |
| 82 | + __asm__ __volatile__ ("fence rw,rw" : : : "memory"); |
| 83 | +} |
| 84 | + |
| 85 | +extern ANDROID_ATOMIC_INLINE |
| 86 | +int32_t android_atomic_acquire_load(volatile const int32_t *ptr) |
| 87 | +{ |
| 88 | + int32_t value = *ptr; |
| 89 | + android_memory_barrier(); |
| 90 | + return value; |
| 91 | +} |
| 92 | + |
| 93 | +extern ANDROID_ATOMIC_INLINE |
| 94 | +int32_t android_atomic_release_load(volatile const int32_t *ptr) |
| 95 | +{ |
| 96 | + android_memory_barrier(); |
| 97 | + return *ptr; |
| 98 | +} |
| 99 | + |
| 100 | +extern ANDROID_ATOMIC_INLINE |
| 101 | +void android_atomic_acquire_store(int32_t value, volatile int32_t *ptr) |
| 102 | +{ |
| 103 | + *ptr = value; |
| 104 | + android_memory_barrier(); |
| 105 | +} |
| 106 | + |
| 107 | +extern ANDROID_ATOMIC_INLINE |
| 108 | +void android_atomic_release_store(int32_t value, volatile int32_t *ptr) |
| 109 | +{ |
| 110 | + android_memory_barrier(); |
| 111 | + *ptr = value; |
| 112 | +} |
| 113 | + |
| 114 | +extern ANDROID_ATOMIC_INLINE |
| 115 | +int android_atomic_cas(int32_t old_value, int32_t new_value, |
| 116 | + volatile int32_t *ptr) |
| 117 | +{ |
| 118 | + return __sync_val_compare_and_swap(ptr, old_value, new_value) != old_value; |
| 119 | +} |
| 120 | + |
| 121 | +extern ANDROID_ATOMIC_INLINE |
| 122 | +int android_atomic_acquire_cas(int32_t old_value, int32_t new_value, |
| 123 | + volatile int32_t *ptr) |
| 124 | +{ |
| 125 | + int status = android_atomic_cas(old_value, new_value, ptr); |
| 126 | + android_memory_barrier(); |
| 127 | + return status; |
| 128 | +} |
| 129 | + |
| 130 | +extern ANDROID_ATOMIC_INLINE |
| 131 | +int android_atomic_release_cas(int32_t old_value, int32_t new_value, |
| 132 | + volatile int32_t *ptr) |
| 133 | +{ |
| 134 | + android_memory_barrier(); |
| 135 | + return android_atomic_cas(old_value, new_value, ptr); |
| 136 | +} |
| 137 | + |
| 138 | +extern ANDROID_ATOMIC_INLINE |
| 139 | +int32_t android_atomic_add(int32_t increment, volatile int32_t *ptr) |
| 140 | +{ |
| 141 | + int32_t prev, status; |
| 142 | + android_memory_barrier(); |
| 143 | + do { |
| 144 | + prev = *ptr; |
| 145 | + status = android_atomic_cas(prev, prev + increment, ptr); |
| 146 | + } while (__builtin_expect(status != 0, 0)); |
| 147 | + return prev; |
| 148 | +} |
| 149 | + |
| 150 | +extern ANDROID_ATOMIC_INLINE |
| 151 | +int32_t android_atomic_inc(volatile int32_t *addr) |
| 152 | +{ |
| 153 | + return android_atomic_add(1, addr); |
| 154 | +} |
| 155 | + |
| 156 | +extern ANDROID_ATOMIC_INLINE |
| 157 | +int32_t android_atomic_dec(volatile int32_t *addr) |
| 158 | +{ |
| 159 | + return android_atomic_add(-1, addr); |
| 160 | +} |
| 161 | + |
| 162 | +extern ANDROID_ATOMIC_INLINE |
| 163 | +int32_t android_atomic_and(int32_t value, volatile int32_t *ptr) |
| 164 | +{ |
| 165 | + int32_t prev, status; |
| 166 | + android_memory_barrier(); |
| 167 | + do { |
| 168 | + prev = *ptr; |
| 169 | + status = android_atomic_cas(prev, prev & value, ptr); |
| 170 | + } while (__builtin_expect(status != 0, 0)); |
| 171 | + return prev; |
| 172 | +} |
| 173 | + |
| 174 | +extern ANDROID_ATOMIC_INLINE |
| 175 | +int32_t android_atomic_or(int32_t value, volatile int32_t *ptr) |
| 176 | +{ |
| 177 | + int32_t prev, status; |
| 178 | + android_memory_barrier(); |
| 179 | + do { |
| 180 | + prev = *ptr; |
| 181 | + status = android_atomic_cas(prev, prev | value, ptr); |
| 182 | + } while (__builtin_expect(status != 0, 0)); |
| 183 | + return prev; |
| 184 | +} |
| 185 | + |
| 186 | +#endif /* ANDROID_CUTILS_ATOMIC_RISCV_H */ |
| 187 | -- |
| 188 | 2.17.1 |
| 189 | |