diff options
Diffstat (limited to 'arch/x86/um/asm/processor_32.h')
-rw-r--r-- | arch/x86/um/asm/processor_32.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/x86/um/asm/processor_32.h b/arch/x86/um/asm/processor_32.h new file mode 100644 index 00000000000..018f732704d --- /dev/null +++ b/arch/x86/um/asm/processor_32.h | |||
@@ -0,0 +1,66 @@ | |||
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 | #include <linux/string.h> | ||
10 | #include <asm/segment.h> | ||
11 | #include <asm/ldt.h> | ||
12 | |||
13 | extern int host_has_cmov; | ||
14 | |||
15 | struct uml_tls_struct { | ||
16 | struct user_desc tls; | ||
17 | unsigned flushed:1; | ||
18 | unsigned present:1; | ||
19 | }; | ||
20 | |||
21 | struct arch_thread { | ||
22 | struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; | ||
23 | unsigned long debugregs[8]; | ||
24 | int debugregs_seq; | ||
25 | struct faultinfo faultinfo; | ||
26 | }; | ||
27 | |||
28 | #define INIT_ARCH_THREAD { \ | ||
29 | .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \ | ||
30 | { .present = 0, .flushed = 0 } }, \ | ||
31 | .debugregs = { [ 0 ... 7 ] = 0 }, \ | ||
32 | .debugregs_seq = 0, \ | ||
33 | .faultinfo = { 0, 0, 0 } \ | ||
34 | } | ||
35 | |||
36 | static inline void arch_flush_thread(struct arch_thread *thread) | ||
37 | { | ||
38 | /* Clear any TLS still hanging */ | ||
39 | memset(&thread->tls_array, 0, sizeof(thread->tls_array)); | ||
40 | } | ||
41 | |||
42 | static inline void arch_copy_thread(struct arch_thread *from, | ||
43 | struct arch_thread *to) | ||
44 | { | ||
45 | memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array)); | ||
46 | } | ||
47 | |||
48 | #include <asm/user.h> | ||
49 | |||
50 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ | ||
51 | static inline void rep_nop(void) | ||
52 | { | ||
53 | __asm__ __volatile__("rep;nop": : :"memory"); | ||
54 | } | ||
55 | |||
56 | #define cpu_relax() rep_nop() | ||
57 | |||
58 | /* | ||
59 | * Default implementation of macro that returns current | ||
60 | * instruction pointer ("program counter"). Stolen | ||
61 | * from asm-i386/processor.h | ||
62 | */ | ||
63 | #define current_text_addr() \ | ||
64 | ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; }) | ||
65 | |||
66 | #endif | ||