Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param
[linux-2.6] / arch / um / sys-i386 / asm / processor.h
CommitLineData
aa6758d4 1/*
1da177e4
LT
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
aa6758d4 9#include "linux/string.h"
efb21cc2 10#include <sysdep/host_ldt.h>
aa6758d4
PBG
11#include "asm/segment.h"
12
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13extern int host_has_cmov;
14
c578455a
BS
15/* include faultinfo structure */
16#include "sysdep/faultinfo.h"
17
aa6758d4
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18struct uml_tls_struct {
19 struct user_desc tls;
20 unsigned flushed:1;
21 unsigned present:1;
22};
23
1da177e4 24struct arch_thread {
aa6758d4 25 struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
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26 unsigned long debugregs[8];
27 int debugregs_seq;
c578455a 28 struct faultinfo faultinfo;
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29};
30
aa6758d4
PBG
31#define INIT_ARCH_THREAD { \
32 .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
33 { .present = 0, .flushed = 0 } }, \
34 .debugregs = { [ 0 ... 7 ] = 0 }, \
35 .debugregs_seq = 0, \
36 .faultinfo = { 0, 0, 0 } \
37}
38
39static inline void arch_flush_thread(struct arch_thread *thread)
40{
41 /* Clear any TLS still hanging */
42 memset(&thread->tls_array, 0, sizeof(thread->tls_array));
43}
44
45static inline void arch_copy_thread(struct arch_thread *from,
46 struct arch_thread *to)
47{
48 memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
49}
1da177e4 50
5077c2a9 51#include <asm/user.h>
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52
53/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
54static inline void rep_nop(void)
55{
56 __asm__ __volatile__("rep;nop": : :"memory");
57}
58
59#define cpu_relax() rep_nop()
60
61/*
62 * Default implementation of macro that returns current
63 * instruction pointer ("program counter"). Stolen
64 * from asm-i386/processor.h
65 */
66#define current_text_addr() \
67 ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
68
69#define ARCH_IS_STACKGROW(address) \
70 (address + 32 >= UPT_SP(&current->thread.regs.regs))
71
fad1c45c
AG
72#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
73#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
74#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)
75
1da177e4
LT
76#include "asm/processor-generic.h"
77
78#endif