arch/um/sys-x86_64/asm/processor.h

   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 /* include faultinfo structure */
  11 #include "sysdep/faultinfo.h"
  12
  13 struct arch_thread {
  14         unsigned long debugregs[8];
  15         int debugregs_seq;
  16         unsigned long fs;
  17         struct faultinfo faultinfo;
  18 };
  19
  20 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
  21 static inline void rep_nop(void)
  22 {
  23         __asm__ __volatile__("rep;nop": : :"memory");
  24 }
  25
  26 #define cpu_relax()   rep_nop()
  27
  28 #define INIT_ARCH_THREAD { .debugregs           = { [ 0 ... 7 ] = 0 }, \
  29                            .debugregs_seq       = 0, \
  30                            .fs                  = 0, \
  31                            .faultinfo           = { 0, 0, 0 } }
  32
  33 static inline void arch_flush_thread(struct arch_thread *thread)
  34 {
  35 }
  36
  37 static inline void arch_copy_thread(struct arch_thread *from,
  38                                     struct arch_thread *to)
  39 {
  40         to->fs = from->fs;
  41 }
  42
  43 #include <asm/user.h>
  44
  45 #define current_text_addr() \
  46         ({ void *pc; __asm__("movq $1f,%0\n1:":"=g" (pc)); pc; })
  47
  48 #define ARCH_IS_STACKGROW(address) \
  49         (address + 128 >= UPT_SP(&current->thread.regs.regs))
  50
  51 #define KSTK_EIP(tsk) KSTK_REG(tsk, RIP)
  52 #define KSTK_ESP(tsk) KSTK_REG(tsk, RSP)
  53
  54 #include "asm/processor-generic.h"
  55
  56 #endif