arch/x86/um/asm/processor_64.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 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 #define ARCH_IS_STACKGROW(address) \
  46         (address + 128 >= UPT_SP(&current->thread.regs.regs))
  47
  48 #define KSTK_EIP(tsk) KSTK_REG(tsk, RIP)
  49 #define KSTK_ESP(tsk) KSTK_REG(tsk, RSP)
  50
  51 #endif