1 /* 2 * Copyright 2003 PathScale, Inc. 3 * 4 * Licensed under the GPL 5 */ 6 7 #ifndef __UM_PROCESSOR_X86_64_H 8 #define __UM_PROCESSOR_X86_64_H 9 10 struct arch_thread { 11 unsigned long debugregs[8]; 12 int debugregs_seq; 13 unsigned long fs; 14 struct faultinfo faultinfo; 15 }; 16 17 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ 18 static inline void rep_nop(void) 19 { 20 __asm__ __volatile__("rep;nop": : :"memory"); 21 } 22 23 #define cpu_relax() rep_nop() 24 25 #define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \ 26 .debugregs_seq = 0, \ 27 .fs = 0, \ 28 .faultinfo = { 0, 0, 0 } } 29 30 static inline void arch_flush_thread(struct arch_thread *thread) 31 { 32 } 33 34 static inline void arch_copy_thread(struct arch_thread *from, 35 struct arch_thread *to) 36 { 37 to->fs = from->fs; 38 } 39 40 #include <asm/user.h> 41 42 #define current_text_addr() \ 43 ({ void *pc; __asm__("movq $1f,%0\n1:":"=g" (pc)); pc; }) 44 45 #endif 46