| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677 | #ifndef _M68K_BITOPS_H#define _M68K_BITOPS_H/* * Copyright 1992, Linus Torvalds. * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file COPYING in the main directory of this archive * for more details. */#ifndef _LINUX_BITOPS_H#error only <linux/bitops.h> can be included directly#endif#include <linux/compiler.h>/* *	Bit access functions vary across the ColdFire and 68k families. *	So we will break them out here, and then macro in the ones we want. * *	ColdFire - supports standard bset/bclr/bchg with register operand only *	68000    - supports standard bset/bclr/bchg with memory operand *	>= 68020 - also supports the bfset/bfclr/bfchg instructions * *	Although it is possible to use only the bset/bclr/bchg with register *	operands on all platforms you end up with larger generated code. *	So we use the best form possible on a given platform. */static inline void bset_reg_set_bit(int nr, volatile unsigned long *vaddr){	char *p = (char *)vaddr + (nr ^ 31) / 8;	__asm__ __volatile__ ("bset %1,(%0)"		:		: "a" (p), "di" (nr & 7)		: "memory");}static inline void bset_mem_set_bit(int nr, volatile unsigned long *vaddr){	char *p = (char *)vaddr + (nr ^ 31) / 8;	__asm__ __volatile__ ("bset %1,%0"		: "+m" (*p)		: "di" (nr & 7));}static inline void bfset_mem_set_bit(int nr, volatile unsigned long *vaddr){	__asm__ __volatile__ ("bfset %1{%0:#1}"		:		: "d" (nr ^ 31), "o" (*vaddr)		: "memory");}#if defined(CONFIG_COLDFIRE)#define	set_bit(nr, vaddr)	bset_reg_set_bit(nr, vaddr)#elif defined(CONFIG_CPU_HAS_NO_BITFIELDS)#define	set_bit(nr, vaddr)	bset_mem_set_bit(nr, vaddr)#else#define set_bit(nr, vaddr)	(__builtin_constant_p(nr) ? \				bset_mem_set_bit(nr, vaddr) : \				bfset_mem_set_bit(nr, vaddr))#endif#define __set_bit(nr, vaddr)	set_bit(nr, vaddr)/* * clear_bit() doesn't provide any barrier for the compiler. */#define smp_mb__before_clear_bit()	barrier()#define smp_mb__after_clear_bit()	barrier()static inline void bclr_reg_clear_bit(int nr, volatile unsigned long *vaddr){
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