LXR linux/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
  13struct 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. */
  21static 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
  33static inline void arch_flush_thread(struct arch_thread *thread)
  34{
  35}
  36
  37static 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
  57