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. */
rep_nop(void)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
arch_flush_thread(struct arch_thread * thread)33 static inline void arch_flush_thread(struct arch_thread *thread)
34 {
35 }
36
arch_copy_thread(struct arch_thread * from,struct arch_thread * to)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(¤t->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