| 1 | /*************************************************************************** |
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| 2 | * Copyright (c) 2006, Broadcom Corporation |
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| 3 | * All Rights Reserved |
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| 4 | * Confidential Property of Broadcom Corporation |
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| 5 | * |
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| 6 | * THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE |
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| 7 | * AGREEMENT BETWEEN THE USER AND BROADCOM. YOU HAVE NO RIGHT TO USE OR |
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| 8 | * EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT. |
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| 9 | * |
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| 10 | * $brcm_Workfile: batomic.h $ |
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| 11 | * $brcm_Revision: 3 $ |
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| 12 | * $brcm_Date: 12/13/06 7:47p $ |
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| 13 | * |
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| 14 | * Module Description: |
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| 15 | * |
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| 16 | * Atomic operations |
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| 17 | * |
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| 18 | * Revision History: |
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| 19 | * |
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| 20 | * $brcm_Log: /BSEAV/lib/bprofile/batomic.h $ |
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| 21 | * |
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| 22 | * 3 12/13/06 7:47p vsilyaev |
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| 23 | * PR 25997: Don't instrument atomic functions |
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| 24 | * |
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| 25 | * 2 12/7/06 2:44p vsilyaev |
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| 26 | * PR 25997: Added fixes for 3.4 GCC compiler |
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| 27 | * |
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| 28 | * 1 11/30/06 8:31p vsilyaev |
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| 29 | * PR 25997: Automic variable |
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| 30 | * |
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| 31 | * |
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| 32 | *******************************************************************************/ |
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| 33 | #ifndef __BATOMIC_H__ |
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| 34 | #define __BATOMIC_H__ |
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| 35 | |
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| 36 | #ifdef __cplusplus |
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| 37 | extern "C" |
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| 38 | { |
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| 39 | #endif |
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| 40 | |
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| 41 | typedef struct batomic_t { |
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| 42 | volatile int atomic; |
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| 43 | } batomic_t; |
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| 44 | |
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| 45 | #define BATOMIC_INIT(v) {(v)} |
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| 46 | #ifndef BSTD_INLINE |
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| 47 | #define BSTD_INLINE extern inline __attribute__((always_inline)) |
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| 48 | #endif |
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| 49 | |
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| 50 | BSTD_INLINE void __attribute__((no_instrument_function)) |
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| 51 | batomic_set(batomic_t *a, int val) { |
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| 52 | a->atomic = val; |
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| 53 | } |
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| 54 | |
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| 55 | BSTD_INLINE int __attribute__((no_instrument_function)) |
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| 56 | batomic_get(const batomic_t *a) { |
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| 57 | return a->atomic; |
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| 58 | } |
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| 59 | |
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| 60 | BSTD_INLINE int __attribute__((no_instrument_function)) |
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| 61 | batomic_add_return(batomic_t *a, int val) |
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| 62 | { |
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| 63 | unsigned temp, result; |
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| 64 | |
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| 65 | __asm__ __volatile__( |
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| 66 | " .set mips32 \n" |
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| 67 | "1: ll %1, %2 # b_atomic_add_return\n" |
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| 68 | " addu %0, %1, %3 \n" |
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| 69 | " sc %0, %2 \n" |
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| 70 | " beqz %0, 1b \n" |
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| 71 | " addu %0, %1, %3 \n" |
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| 72 | " .set mips0 \n" |
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| 73 | : "=&r" (result), "=&r" (temp), "=m" (a->atomic) |
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| 74 | : "Ir" (val), "m" (a->atomic) |
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| 75 | : "memory"); |
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| 76 | return result; |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | #ifdef __cplusplus |
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| 81 | } |
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| 82 | #endif |
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| 83 | |
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| 84 | #endif /* __BATOMIC_H__ */ |
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