/* MN10300 Atomic xchg/cmpxchg operations * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #ifndef _ASM_CMPXCHG_H #define _ASM_CMPXCHG_H #include <asm/irqflags.h> #ifdef CONFIG_SMP #ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT static inline unsigned long __xchg(volatile unsigned long *m, unsigned long val) { unsigned long status; unsigned long oldval; asm volatile( "1: mov %4,(_AAR,%3) \n" " mov (_ADR,%3),%1 \n" " mov %5,(_ADR,%3) \n" " mov (_ADR,%3),%0 \n" /* flush */ " mov (_ASR,%3),%0 \n" " or %0,%0 \n" " bne 1b \n" : "=&r"(status), "=&r"(oldval), "=m"(*m) : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m), "r"(val) : "memory", "cc"); return oldval; } static inline unsigned long __cmpxchg(volatile unsigned long *m, unsigned long old, unsigned long new) { unsigned long status; unsigned long oldval; asm volatile( "1: mov %4,(_AAR,%3) \n" " mov (_ADR,%3),%1 \n" " cmp %5,%1 \n" " bne 2f \n" " mov %6,(_ADR,%3) \n" "2: mov (_ADR,%3),%0 \n" /* flush */ " mov (_ASR,%3),%0 \n" " or %0,%0 \n" " bne 1b \n" : "=&r"(status), "=&r"(oldval), "=m"(*m) : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m), "r"(old), "r"(new) : "memory", "cc"); return oldval; } #else /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */ #error "No SMP atomic operation support!" #endif /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */ #else /* CONFIG_SMP */ /* * Emulate xchg for non-SMP MN10300 */ struct __xchg_dummy { unsigned long a[100]; }; #define __xg(x) ((struct __xchg_dummy *)(x)) static inline unsigned long __xchg(volatile unsigned long *m, unsigned long val) { unsigned long oldval; unsigned long flags; flags = arch_local_cli_save(); oldval = *m; *m = val; arch_local_irq_restore(flags); return oldval; } /* * Emulate cmpxchg for non-SMP MN10300 */ static inline unsigned long __cmpxchg(volatile unsigned long *m, unsigned long old, unsigned long new) { unsigned long oldval; unsigned long flags; flags = arch_local_cli_save(); oldval = *m; if (oldval == old) *m = new; arch_local_irq_restore(flags); return oldval; } #endif /* CONFIG_SMP */ #define xchg(ptr, v) \ ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr), \ (unsigned long)(v))) #define cmpxchg(ptr, o, n) \ ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \ (unsigned long)(o), \ (unsigned long)(n))) #endif /* _ASM_CMPXCHG_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 314 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 4.02 KB | 0644 |
|
bitops.h | File | 5.42 KB | 0644 |
|
bug.h | File | 864 B | 0644 |
|
bugs.h | File | 561 B | 0644 |
|
busctl-regs.h | File | 7.8 KB | 0644 |
|
cache.h | File | 2.06 KB | 0644 |
|
cacheflush.h | File | 7.6 KB | 0644 |
|
checksum.h | File | 2.09 KB | 0644 |
|
cmpxchg.h | File | 2.65 KB | 0644 |
|
cpu-regs.h | File | 16.61 KB | 0644 |
|
current.h | File | 922 B | 0644 |
|
debugger.h | File | 1.2 KB | 0644 |
|
delay.h | File | 597 B | 0644 |
|
div64.h | File | 3.21 KB | 0644 |
|
dma-mapping.h | File | 636 B | 0644 |
|
dma.h | File | 3.09 KB | 0644 |
|
dmactl-regs.h | File | 532 B | 0644 |
|
elf.h | File | 4.49 KB | 0644 |
|
emergency-restart.h | File | 43 B | 0644 |
|
exceptions.h | File | 4.74 KB | 0644 |
|
fpu.h | File | 3.57 KB | 0644 |
|
frame.inc | File | 2.37 KB | 0644 |
|
ftrace.h | File | 12 B | 0644 |
|
futex.h | File | 31 B | 0644 |
|
gdb-stub.h | File | 5.42 KB | 0644 |
|
hardirq.h | File | 1.68 KB | 0644 |
|
highmem.h | File | 3.01 KB | 0644 |
|
hw_irq.h | File | 483 B | 0644 |
|
intctl-regs.h | File | 2.26 KB | 0644 |
|
io.h | File | 7.67 KB | 0644 |
|
irq.h | File | 1.11 KB | 0644 |
|
irq_regs.h | File | 751 B | 0644 |
|
irqflags.h | File | 4.05 KB | 0644 |
|
kdebug.h | File | 561 B | 0644 |
|
kgdb.h | File | 1.7 KB | 0644 |
|
kmap_types.h | File | 160 B | 0644 |
|
kprobes.h | File | 1.59 KB | 0644 |
|
linkage.h | File | 593 B | 0644 |
|
local.h | File | 31 B | 0644 |
|
local64.h | File | 33 B | 0644 |
|
mc146818rtc.h | File | 26 B | 0644 |
|
mmu.h | File | 434 B | 0644 |
|
mmu_context.h | File | 4.44 KB | 0644 |
|
module.h | File | 677 B | 0644 |
|
nmi.h | File | 500 B | 0644 |
|
page.h | File | 3.63 KB | 0644 |
|
page_offset.h | File | 302 B | 0644 |
|
pci.h | File | 2.17 KB | 0644 |
|
percpu.h | File | 32 B | 0644 |
|
pgalloc.h | File | 1.49 KB | 0644 |
|
pgtable.h | File | 15.68 KB | 0644 |
|
pio-regs.h | File | 7.53 KB | 0644 |
|
processor.h | File | 4.12 KB | 0644 |
|
ptrace.h | File | 805 B | 0644 |
|
reset-regs.h | File | 1.8 KB | 0644 |
|
rtc-regs.h | File | 3.57 KB | 0644 |
|
rtc.h | File | 692 B | 0644 |
|
rwlock.h | File | 2.98 KB | 0644 |
|
serial-regs.h | File | 8.85 KB | 0644 |
|
serial.h | File | 1.02 KB | 0644 |
|
setup.h | File | 574 B | 0644 |
|
shmparam.h | File | 182 B | 0644 |
|
signal.h | File | 888 B | 0644 |
|
smp.h | File | 3.06 KB | 0644 |
|
smsc911x.h | File | 27 B | 0644 |
|
spinlock.h | File | 3.84 KB | 0644 |
|
spinlock_types.h | File | 445 B | 0644 |
|
string.h | File | 1.03 KB | 0644 |
|
switch_to.h | File | 1.49 KB | 0644 |
|
syscall.h | File | 2.38 KB | 0644 |
|
termios.h | File | 387 B | 0644 |
|
thread_info.h | File | 4.36 KB | 0644 |
|
timer-regs.h | File | 20.72 KB | 0644 |
|
timex.h | File | 843 B | 0644 |
|
tlb.h | File | 941 B | 0644 |
|
tlbflush.h | File | 3.45 KB | 0644 |
|
topology.h | File | 34 B | 0644 |
|
types.h | File | 620 B | 0644 |
|
uaccess.h | File | 7.78 KB | 0644 |
|
ucontext.h | File | 673 B | 0644 |
|
unaligned.h | File | 678 B | 0644 |
|
unistd.h | File | 1.34 KB | 0644 |
|
user.h | File | 1.91 KB | 0644 |
|
vga.h | File | 471 B | 0644 |
|
xor.h | File | 29 B | 0644 |
|