mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.8 KiB
66 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* Copyright IBM Corp. 1999, 2011 |
|
* |
|
* Author(s): Martin Schwidefsky <[email protected]>, |
|
*/ |
|
|
|
#ifndef __ASM_CMPXCHG_H |
|
#define __ASM_CMPXCHG_H |
|
|
|
#include <linux/mmdebug.h> |
|
#include <linux/types.h> |
|
#include <linux/bug.h> |
|
|
|
#define cmpxchg(ptr, o, n) \ |
|
({ \ |
|
__typeof__(*(ptr)) __o = (o); \ |
|
__typeof__(*(ptr)) __n = (n); \ |
|
(__typeof__(*(ptr))) __sync_val_compare_and_swap((ptr),__o,__n);\ |
|
}) |
|
|
|
#define cmpxchg64 cmpxchg |
|
#define cmpxchg_local cmpxchg |
|
#define cmpxchg64_local cmpxchg |
|
|
|
#define xchg(ptr, x) \ |
|
({ \ |
|
__typeof__(ptr) __ptr = (ptr); \ |
|
__typeof__(*(ptr)) __old; \ |
|
do { \ |
|
__old = *__ptr; \ |
|
} while (!__sync_bool_compare_and_swap(__ptr, __old, x)); \ |
|
__old; \ |
|
}) |
|
|
|
#define __cmpxchg_double(p1, p2, o1, o2, n1, n2) \ |
|
({ \ |
|
register __typeof__(*(p1)) __old1 asm("2") = (o1); \ |
|
register __typeof__(*(p2)) __old2 asm("3") = (o2); \ |
|
register __typeof__(*(p1)) __new1 asm("4") = (n1); \ |
|
register __typeof__(*(p2)) __new2 asm("5") = (n2); \ |
|
int cc; \ |
|
asm volatile( \ |
|
" cdsg %[old],%[new],%[ptr]\n" \ |
|
" ipm %[cc]\n" \ |
|
" srl %[cc],28" \ |
|
: [cc] "=d" (cc), [old] "+d" (__old1), "+d" (__old2) \ |
|
: [new] "d" (__new1), "d" (__new2), \ |
|
[ptr] "Q" (*(p1)), "Q" (*(p2)) \ |
|
: "memory", "cc"); \ |
|
!cc; \ |
|
}) |
|
|
|
#define cmpxchg_double(p1, p2, o1, o2, n1, n2) \ |
|
({ \ |
|
__typeof__(p1) __p1 = (p1); \ |
|
__typeof__(p2) __p2 = (p2); \ |
|
BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long)); \ |
|
BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \ |
|
VM_BUG_ON((unsigned long)((__p1) + 1) != (unsigned long)(__p2));\ |
|
__cmpxchg_double(__p1, __p2, o1, o2, n1, n2); \ |
|
}) |
|
|
|
#define system_has_cmpxchg_double() 1 |
|
|
|
#endif /* __ASM_CMPXCHG_H */
|
|
|