| From 48ddf4fb999931942c359350fb31cd557514e1c6 Mon Sep 17 00:00:00 2001 |
| From: Chenxi Mao <maochenxi@eswin.com> |
| Date: Mon, 20 Apr 2020 15:27:22 +0800 |
| Subject: [PATCH 1/1] adb: Support riscv64 |
| |
| --- |
| include/cutils/atomic-inline.h | 2 + |
| include/cutils/atomic-riscv64.h | 156 ++++++++++++++++++++++++++++++++ |
| 2 files changed, 158 insertions(+) |
| create mode 100644 include/cutils/atomic-riscv64.h |
| |
| diff --git a/include/cutils/atomic-inline.h b/include/cutils/atomic-inline.h |
| index a31e913579..b5dc38209c 100644 |
| --- a/include/cutils/atomic-inline.h |
| +++ b/include/cutils/atomic-inline.h |
| @@ -55,6 +55,8 @@ extern "C" { |
| #include <cutils/atomic-mips64.h> |
| #elif defined(__mips__) |
| #include <cutils/atomic-mips.h> |
| +#elif defined(__riscv) && __riscv_xlen == 64 |
| +#include <cutils/atomic-riscv64.h> |
| #else |
| #error atomic operations are unsupported |
| #endif |
| diff --git a/include/cutils/atomic-riscv64.h b/include/cutils/atomic-riscv64.h |
| new file mode 100644 |
| index 0000000000..2664db5a86 |
| --- /dev/null |
| +++ b/include/cutils/atomic-riscv64.h |
| @@ -0,0 +1,156 @@ |
| +/* |
| + * Copyright (C) 2014 The Android Open Source Project |
| + * All rights reserved. |
| + * |
| + * Redistribution and use in source and binary forms, with or without |
| + * modification, are permitted provided that the following conditions |
| + * are met: |
| + * * Redistributions of source code must retain the above copyright |
| + * notice, this list of conditions and the following disclaimer. |
| + * * 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 COPYRIGHT HOLDERS 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 |
| + * COPYRIGHT OWNER 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 ANDROID_CUTILS_ATOMIC_RISCV64_H |
| +#define ANDROID_CUTILS_ATOMIC_RISCV64_H |
| + |
| +#include <stdint.h> |
| + |
| +#ifndef ANDROID_ATOMIC_INLINE |
| +#define ANDROID_ATOMIC_INLINE inline __attribute__((always_inline)) |
| +#endif |
| + |
| +/* |
| + TODOAArch64: Revisit the below functions and check for potential |
| + optimizations using assembly code or otherwise. |
| +*/ |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +void android_compiler_barrier(void) |
| +{ |
| + __asm__ __volatile__ ("" : : : "memory"); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +void android_memory_barrier(void) |
| +{ |
| + __asm__ __volatile__ ("fence rw,rw" : : : "memory"); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_acquire_load(volatile const int32_t *ptr) |
| +{ |
| + int32_t value = *ptr; |
| + android_memory_barrier(); |
| + return value; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_release_load(volatile const int32_t *ptr) |
| +{ |
| + android_memory_barrier(); |
| + return *ptr; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +void android_atomic_acquire_store(int32_t value, volatile int32_t *ptr) |
| +{ |
| + *ptr = value; |
| + android_memory_barrier(); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +void android_atomic_release_store(int32_t value, volatile int32_t *ptr) |
| +{ |
| + android_memory_barrier(); |
| + *ptr = value; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int android_atomic_cas(int32_t old_value, int32_t new_value, |
| + volatile int32_t *ptr) |
| +{ |
| + return __sync_val_compare_and_swap(ptr, old_value, new_value) != old_value; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int android_atomic_acquire_cas(int32_t old_value, int32_t new_value, |
| + volatile int32_t *ptr) |
| +{ |
| + int status = android_atomic_cas(old_value, new_value, ptr); |
| + android_memory_barrier(); |
| + return status; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int android_atomic_release_cas(int32_t old_value, int32_t new_value, |
| + volatile int32_t *ptr) |
| +{ |
| + android_memory_barrier(); |
| + return android_atomic_cas(old_value, new_value, ptr); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_add(int32_t increment, volatile int32_t *ptr) |
| +{ |
| + int32_t prev, status; |
| + android_memory_barrier(); |
| + do { |
| + prev = *ptr; |
| + status = android_atomic_cas(prev, prev + increment, ptr); |
| + } while (__builtin_expect(status != 0, 0)); |
| + return prev; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_inc(volatile int32_t *addr) |
| +{ |
| + return android_atomic_add(1, addr); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_dec(volatile int32_t *addr) |
| +{ |
| + return android_atomic_add(-1, addr); |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_and(int32_t value, volatile int32_t *ptr) |
| +{ |
| + int32_t prev, status; |
| + android_memory_barrier(); |
| + do { |
| + prev = *ptr; |
| + status = android_atomic_cas(prev, prev & value, ptr); |
| + } while (__builtin_expect(status != 0, 0)); |
| + return prev; |
| +} |
| + |
| +extern ANDROID_ATOMIC_INLINE |
| +int32_t android_atomic_or(int32_t value, volatile int32_t *ptr) |
| +{ |
| + int32_t prev, status; |
| + android_memory_barrier(); |
| + do { |
| + prev = *ptr; |
| + status = android_atomic_cas(prev, prev | value, ptr); |
| + } while (__builtin_expect(status != 0, 0)); |
| + return prev; |
| +} |
| + |
| +#endif /* ANDROID_CUTILS_ATOMIC_RISCV_H */ |
| -- |
| 2.17.1 |
| |