2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #ifndef __UM_PROCESSOR_I386_H
7 #define __UM_PROCESSOR_I386_H
9 extern int host_has_xmm;
10 extern int host_has_cmov;
12 /* include faultinfo structure */
13 #include "sysdep/faultinfo.h"
16 unsigned long debugregs[8];
18 struct faultinfo faultinfo;
21 #define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \
23 .faultinfo = { 0, 0, 0 } }
25 #include "asm/arch/user.h"
27 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
28 static inline void rep_nop(void)
30 __asm__ __volatile__("rep;nop": : :"memory");
33 #define cpu_relax() rep_nop()
36 * Default implementation of macro that returns current
37 * instruction pointer ("program counter"). Stolen
38 * from asm-i386/processor.h
40 #define current_text_addr() \
41 ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
43 #define ARCH_IS_STACKGROW(address) \
44 (address + 32 >= UPT_SP(¤t->thread.regs.regs))
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)
50 #include "asm/processor-generic.h"