X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Farch_uatomic_ppc.h;fp=urcu%2Farch_uatomic_ppc.h;h=0000000000000000000000000000000000000000;hp=40de9ff9909dc10327bb75e29aca9e33f7743f41;hb=48d848c7291ec22da6258ac03cd9c1dafec1fdfb;hpb=3644b3ee9ca6a858cf733579012ef595d652dcdf diff --git a/urcu/arch_uatomic_ppc.h b/urcu/arch_uatomic_ppc.h deleted file mode 100644 index 40de9ff..0000000 --- a/urcu/arch_uatomic_ppc.h +++ /dev/null @@ -1,231 +0,0 @@ -#ifndef _URCU_ARCH_UATOMIC_PPC_H -#define _URCU_ARCH_UATOMIC_PPC_H - -/* - * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. - * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved. - * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P. - * Copyright (c) 2009 Mathieu Desnoyers - * - * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED - * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. - * - * Permission is hereby granted to use or copy this program - * for any purpose, provided the above notices are retained on all copies. - * Permission to modify the code and to distribute modified code is granted, - * provided the above notices are retained, and a notice that the code was - * modified is included with the above copyright notice. - * - * Code inspired from libuatomic_ops-1.2, inherited in part from the - * Boehm-Demers-Weiser conservative garbage collector. - */ - -#include - -#ifndef __SIZEOF_LONG__ -#ifdef __powerpc64__ -#define __SIZEOF_LONG__ 8 -#else -#define __SIZEOF_LONG__ 4 -#endif -#endif - -#ifndef BITS_PER_LONG -#define BITS_PER_LONG (__SIZEOF_LONG__ * 8) -#endif - -#define ILLEGAL_INSTR ".long 0xd00d00" - -#define uatomic_set(addr, v) \ -do { \ - ACCESS_ONCE(*(addr)) = (v); \ -} while (0) - -#define uatomic_read(addr) ACCESS_ONCE(*(addr)) - -/* - * Using a isync as second barrier for exchange to provide acquire semantic. - * According to uatomic_ops/sysdeps/gcc/powerpc.h, the documentation is "fairly - * explicit that this also has acquire semantics." - * Derived from AO_compare_and_swap(), but removed the comparison. - */ - -/* xchg */ - -static inline __attribute__((always_inline)) -unsigned long _uatomic_exchange(void *addr, unsigned long val, int len) -{ - switch (len) { - case 4: - { - unsigned int result; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "lwarx %0,0,%1\n" /* load and reserve */ - "stwcx. %2,0,%1\n" /* else store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - : "=&r"(result) - : "r"(addr), "r"(val) - : "memory", "cc"); - - return result; - } -#if (BITS_PER_LONG == 64) - case 8: - { - unsigned long result; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "ldarx %0,0,%1\n" /* load and reserve */ - "stdcx. %2,0,%1\n" /* else store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - : "=&r"(result) - : "r"(addr), "r"(val) - : "memory", "cc"); - - return result; - } -#endif - } - /* generate an illegal instruction. Cannot catch this with linker tricks - * when optimizations are disabled. */ - __asm__ __volatile__(ILLEGAL_INSTR); - return 0; -} - -#define uatomic_xchg(addr, v) \ - ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \ - sizeof(*(addr)))) -/* cmpxchg */ - -static inline __attribute__((always_inline)) -unsigned long _uatomic_cmpxchg(void *addr, unsigned long old, - unsigned long _new, int len) -{ - switch (len) { - case 4: - { - unsigned int old_val; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "lwarx %0,0,%1\n" /* load and reserve */ - "cmpd %0,%3\n" /* if load is not equal to */ - "bne 2f\n" /* old, fail */ - "stwcx. %2,0,%1\n" /* else store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - "2:\n" - : "=&r"(old_val) - : "r"(addr), "r"((unsigned int)_new), - "r"((unsigned int)old) - : "memory", "cc"); - - return old_val; - } -#if (BITS_PER_LONG == 64) - case 8: - { - unsigned long old_val; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "ldarx %0,0,%1\n" /* load and reserve */ - "cmpd %0,%3\n" /* if load is not equal to */ - "bne 2f\n" /* old, fail */ - "stdcx. %2,0,%1\n" /* else store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - "2:\n" - : "=&r"(old_val), - : "r"(addr), "r"((unsigned long)_new), - "r"((unsigned long)old) - : "memory", "cc"); - - return old_val; - } -#endif - } - /* generate an illegal instruction. Cannot catch this with linker tricks - * when optimizations are disabled. */ - __asm__ __volatile__(ILLEGAL_INSTR); - return 0; -} - - -#define uatomic_cmpxchg(addr, old, _new) \ - ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\ - (unsigned long)(_new), \ - sizeof(*(addr)))) - -/* uatomic_add_return */ - -static inline __attribute__((always_inline)) -unsigned long _uatomic_add_return(void *addr, unsigned long val, - int len) -{ - switch (len) { - case 4: - { - unsigned int result; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "lwarx %0,0,%1\n" /* load and reserve */ - "add %0,%2,%0\n" /* add val to value loaded */ - "stwcx. %0,0,%1\n" /* store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - : "=&r"(result) - : "r"(addr), "r"(val) - : "memory", "cc"); - - return result; - } -#if (BITS_PER_LONG == 64) - case 8: - { - unsigned long result; - - __asm__ __volatile__( - "lwsync\n" - "1:\t" "ldarx %0,0,%1\n" /* load and reserve */ - "add %0,%2,%0\n" /* add val to value loaded */ - "stdcx. %0,0,%1\n" /* store conditional */ - "bne- 1b\n" /* retry if lost reservation */ - "isync\n" - : "=&r"(result) - : "r"(addr), "r"(val) - : "memory", "cc"); - - return result; - } -#endif - } - /* generate an illegal instruction. Cannot catch this with linker tricks - * when optimizations are disabled. */ - __asm__ __volatile__(ILLEGAL_INSTR); - return 0; -} - - -#define uatomic_add_return(addr, v) \ - ((__typeof__(*(addr))) _uatomic_add_return((addr), \ - (unsigned long)(v), \ - sizeof(*(addr)))) - -/* uatomic_sub_return, uatomic_add, uatomic_sub, uatomic_inc, uatomic_dec */ - -#define uatomic_sub_return(addr, v) uatomic_add_return((addr), -(v)) - -#define uatomic_add(addr, v) (void)uatomic_add_return((addr), (v)) -#define uatomic_sub(addr, v) (void)uatomic_sub_return((addr), (v)) - -#define uatomic_inc(addr) uatomic_add((addr), 1) -#define uatomic_dec(addr) uatomic_add((addr), -1) - -#endif /* _URCU_ARCH_UATOMIC_PPC_H */