/* * Atomics xchg/cmpxchg for PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2012 GUAN Xue-tao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __UNICORE_CMPXCHG_H__ #define __UNICORE_CMPXCHG_H__ /* * Generate a link failure on undefined symbol if the pointer points to a value * of unsupported size. */ extern void __xchg_bad_pointer(void); static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size) { unsigned long ret; switch (size) { case 1: asm volatile("swapb %0, %1, [%2]" : "=&r" (ret) : "r" (x), "r" (ptr) : "memory", "cc"); break; case 4: asm volatile("swapw %0, %1, [%2]" : "=&r" (ret) : "r" (x), "r" (ptr) : "memory", "cc"); break; default: __xchg_bad_pointer(); } return ret; } #define xchg(ptr, x) \ ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) #include <asm-generic/cmpxchg-local.h> /* * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make * them available. */ #define cmpxchg_local(ptr, o, n) \ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \ (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr)))) #define cmpxchg64_local(ptr, o, n) \ __cmpxchg64_local_generic((ptr), (o), (n)) #include <asm-generic/cmpxchg.h> #endif /* __UNICORE_CMPXCHG_H__ */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 877 B | 0644 |
|
assembler.h | File | 2.71 KB | 0644 |
|
barrier.h | File | 602 B | 0644 |
|
bitops.h | File | 1.19 KB | 0644 |
|
bug.h | File | 632 B | 0644 |
|
cache.h | File | 805 B | 0644 |
|
cacheflush.h | File | 6.46 KB | 0644 |
|
checksum.h | File | 978 B | 0644 |
|
cmpxchg.h | File | 1.43 KB | 0644 |
|
cpu-single.h | File | 1.18 KB | 0644 |
|
cputype.h | File | 787 B | 0644 |
|
delay.h | File | 1.53 KB | 0644 |
|
dma-mapping.h | File | 1.11 KB | 0644 |
|
dma.h | File | 531 B | 0644 |
|
elf.h | File | 2.58 KB | 0644 |
|
fpstate.h | File | 550 B | 0644 |
|
fpu-ucf64.h | File | 1.32 KB | 0644 |
|
gpio.h | File | 2.75 KB | 0644 |
|
hwcap.h | File | 773 B | 0644 |
|
hwdef-copro.h | File | 1.3 KB | 0644 |
|
io.h | File | 2 KB | 0644 |
|
irq.h | File | 2.56 KB | 0644 |
|
irqflags.h | File | 1.03 KB | 0644 |
|
linkage.h | File | 524 B | 0644 |
|
memblock.h | File | 1.1 KB | 0644 |
|
memory.h | File | 3 KB | 0644 |
|
mmu.h | File | 430 B | 0644 |
|
mmu_context.h | File | 2.76 KB | 0644 |
|
page.h | File | 1.89 KB | 0644 |
|
pci.h | File | 578 B | 0644 |
|
pgalloc.h | File | 2.47 KB | 0644 |
|
pgtable-hwdef.h | File | 1.3 KB | 0644 |
|
pgtable.h | File | 9.42 KB | 0644 |
|
processor.h | File | 1.98 KB | 0644 |
|
ptrace.h | File | 1.37 KB | 0644 |
|
stacktrace.h | File | 787 B | 0644 |
|
string.h | File | 994 B | 0644 |
|
suspend.h | File | 667 B | 0644 |
|
switch_to.h | File | 901 B | 0644 |
|
thread_info.h | File | 3.29 KB | 0644 |
|
timex.h | File | 767 B | 0644 |
|
tlb.h | File | 781 B | 0644 |
|
tlbflush.h | File | 5.53 KB | 0644 |
|
traps.h | File | 627 B | 0644 |
|
uaccess.h | File | 1.33 KB | 0644 |
|