1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3*4882a593Smuzhiyun * Licensed under the GPL
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef __UM_PROCESSOR_I386_H
7*4882a593Smuzhiyun #define __UM_PROCESSOR_I386_H
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/string.h>
10*4882a593Smuzhiyun #include <asm/segment.h>
11*4882a593Smuzhiyun #include <asm/ldt.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun extern int host_has_cmov;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun struct uml_tls_struct {
16*4882a593Smuzhiyun struct user_desc tls;
17*4882a593Smuzhiyun unsigned flushed:1;
18*4882a593Smuzhiyun unsigned present:1;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct arch_thread {
22*4882a593Smuzhiyun struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
23*4882a593Smuzhiyun unsigned long debugregs[8];
24*4882a593Smuzhiyun int debugregs_seq;
25*4882a593Smuzhiyun struct faultinfo faultinfo;
26*4882a593Smuzhiyun };
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #define INIT_ARCH_THREAD { \
29*4882a593Smuzhiyun .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
30*4882a593Smuzhiyun { .present = 0, .flushed = 0 } }, \
31*4882a593Smuzhiyun .debugregs = { [ 0 ... 7 ] = 0 }, \
32*4882a593Smuzhiyun .debugregs_seq = 0, \
33*4882a593Smuzhiyun .faultinfo = { 0, 0, 0 } \
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #define STACKSLOTS_PER_LINE 8
37*4882a593Smuzhiyun
arch_flush_thread(struct arch_thread * thread)38*4882a593Smuzhiyun static inline void arch_flush_thread(struct arch_thread *thread)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun /* Clear any TLS still hanging */
41*4882a593Smuzhiyun memset(&thread->tls_array, 0, sizeof(thread->tls_array));
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
arch_copy_thread(struct arch_thread * from,struct arch_thread * to)44*4882a593Smuzhiyun static inline void arch_copy_thread(struct arch_thread *from,
45*4882a593Smuzhiyun struct arch_thread *to)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun #define current_sp() ({ void *sp; __asm__("movl %%esp, %0" : "=r" (sp) : ); sp; })
51*4882a593Smuzhiyun #define current_bp() ({ unsigned long bp; __asm__("movl %%ebp, %0" : "=r" (bp) : ); bp; })
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun #endif
54