include/asm-um/processor-i386.h


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/* 
 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#ifndef __UM_PROCESSOR_I386_H
#define __UM_PROCESSOR_I386_H

extern int host_has_xmm;
extern int host_has_cmov;

/* include faultinfo structure */
#include "sysdep/faultinfo.h"

struct arch_thread {
	unsigned long debugregs[8];
	int debugregs_seq;
	struct faultinfo faultinfo;
};

#define INIT_ARCH_THREAD { .debugregs  		= { [ 0 ... 7 ] = 0 }, \
                           .debugregs_seq	= 0, \
                           .faultinfo		= { 0, 0, 0 } }

#include "asm/arch/user.h"

/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
static inline void rep_nop(void)
{
	__asm__ __volatile__("rep;nop": : :"memory");
}

#define cpu_relax()	rep_nop()

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter"). Stolen
 * from asm-i386/processor.h
 */
#define current_text_addr() \
	({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })

#define ARCH_IS_STACKGROW(address) \
       (address + 32 >= UPT_SP(&current->thread.regs.regs))

#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)

#include "asm/processor-generic.h"

#endif