Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  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 
 13 struct 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. */
 21 static 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 
 33 static inline void arch_flush_thread(struct arch_thread *thread)
 34 {
 35 }
 36 
 37 static 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 
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