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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [include/] [asm-i960/] [system.h] - Rev 199
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/* * Copyright (C) 1999 Keith Adams <kma@cse.ogi.edu> * Oregon Graduate Institute */ #ifndef _I960_SYSTEM_H #define _I960_SYSTEM_H #include <linux/linkage.h> asmlinkage void resume(void); struct task_struct; extern void switch_to(struct task_struct* prev, struct task_struct* next); #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) #define tas(ptr) (xchg((ptr),1)) #define cli() do { \ int garbage; \ __asm__ __volatile__("modpc g0, %1, %1" \ :"=r" (garbage) \ : "0" (0x1f << 16)); \ } while (0) #define sti() do { \ int garbage; \ __asm__ __volatile__("modpc g0, %1, %2" \ : "=r" (garbage) \ : "r" (0x1f << 16), "0" (0)); \ } while (0) #define save_flags(flags) do { \ __asm__ __volatile__ ("modpc g0, 0, %0" :"=&r" (flags)); \ } while (0) #define restore_flags(flags) do { \ int flagcpy=flags; \ __asm__ __volatile__ ("modpc g0, %1, %2" \ : "=r"(flagcpy) \ : "r" (0xffffffff), "0" (flagcpy)); \ } while (0) extern unsigned long atmod(volatile void* ptr, unsigned long mask, unsigned long val); static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size) { unsigned long mask, retval; int off; switch (size) { case 1: mask = 0xff; off = (long) ptr % 4; mask <<= off * 8; x <<= off * 8; retval = atmod(ptr, mask, x); break; case 2: mask = 0xffff; off = (long)ptr % 2; mask <<= off * 16; x <<= off * 16; retval = atmod(ptr, mask, x); break; case 4: mask = 0xffffffff; retval = atmod(ptr, mask, x); break; } return retval; } #endif /* _I960_SYSTEM_H */
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