include/asm-um/processor-i386.h

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __UM_PROCESSOR_I386_H
   7 #define __UM_PROCESSOR_I386_H
   8
   9 extern int host_has_xmm;
  10 extern int host_has_cmov;
  11
  12 /* include faultinfo structure */
  13 #include "sysdep/faultinfo.h"
  14
  15 struct arch_thread {
  16         unsigned long debugregs[8];
  17         int debugregs_seq;
  18         struct faultinfo faultinfo;
  19 };
  20
  21 #define INIT_ARCH_THREAD { .debugregs           = { [ 0 ... 7 ] = 0 }, \
  22                            .debugregs_seq       = 0, \
  23                            .faultinfo           = { 0, 0, 0 } }
  24
  25 #include "asm/arch/user.h"
  26
  27 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
  28 static inline void rep_nop(void)
  29 {
  30         __asm__ __volatile__("rep;nop": : :"memory");
  31 }
  32
  33 #define cpu_relax()     rep_nop()
  34
  35 /*
  36  * Default implementation of macro that returns current
  37  * instruction pointer ("program counter"). Stolen
  38  * from asm-i386/processor.h
  39  */
  40 #define current_text_addr() \
  41         ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
  42
  43 #define ARCH_IS_STACKGROW(address) \
  44        (address + 32 >= UPT_SP(&current->thread.regs.regs))
  45
  46 #define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
  47 #define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
  48 #define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)
  49
  50 #include "asm/processor-generic.h"
  51
  52 #endif