LXR linux/arch/x86/um/asm/processor

   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
  13extern int host_has_cmov;
  14
  15struct uml_tls_struct {
  16        struct user_desc tls;
  17        unsigned flushed:1;
  18        unsigned present:1;
  19};
  20
  21struct 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#define STACKSLOTS_PER_LINE 8
  37
  38static inline void arch_flush_thread(struct arch_thread *thread)
  39{
  40        /* Clear any TLS still hanging */
  41        memset(&thread->tls_array, 0, sizeof(thread->tls_array));
  42}
  43
  44static inline void arch_copy_thread(struct arch_thread *from,
  45                                    struct arch_thread *to)
  46{
  47        memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
  48}
  49
  50#define current_sp() ({ void *sp; __asm__("movl %%esp, %0" : "=r" (sp) : ); sp; })
  51#define current_bp() ({ unsigned long bp; __asm__("movl %%ebp, %0" : "=r" (bp) : ); bp; })
  52
  53#endif
  54