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 struct arch_thread {
  13         unsigned long debugregs[8];
  14         int debugregs_seq;
  15 };
  16
  17 #define INIT_ARCH_THREAD { .debugregs           = { [ 0 ... 7 ] = 0 }, \
  18                            .debugregs_seq       = 0 }
  19
  20 #include "asm/arch/user.h"
  21
  22 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
  23 static inline void rep_nop(void)
  24 {
  25         __asm__ __volatile__("rep;nop": : :"memory");
  26 }
  27
  28 #define cpu_relax()     rep_nop()
  29
  30 /*
  31  * Default implementation of macro that returns current
  32  * instruction pointer ("program counter"). Stolen
  33  * from asm-i386/processor.h
  34  */
  35 #define current_text_addr() \
  36         ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
  37
  38 #define ARCH_IS_STACKGROW(address) \
  39        (address + 32 >= UPT_SP(&current->thread.regs.regs))
  40
  41 #include "asm/processor-generic.h"
  42
  43 #endif
  44
  45 /*
  46  * Overrides for Emacs so that we follow Linus's tabbing style.
  47  * Emacs will notice this stuff at the end of the file and automatically
  48  * adjust the settings for this buffer only.  This must remain at the end
  49  * of the file.
  50  * ---------------------------------------------------------------------------
  51  * Local variables:
  52  * c-file-style: "linux"
  53  * End:
  54  */