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