include/asm-x86/system.h

   1 #ifndef _ASM_X86_SYSTEM_H_
   2 #define _ASM_X86_SYSTEM_H_
   3
   4 #include <asm/asm.h>
   5
   6 #ifdef CONFIG_X86_32
   7 # include "system_32.h"
   8 #else
   9 # include "system_64.h"
  10 #endif
  11
  12 #ifdef __KERNEL__
  13 #define _set_base(addr, base) do { unsigned long __pr; \
  14 __asm__ __volatile__ ("movw %%dx,%1\n\t" \
  15         "rorl $16,%%edx\n\t" \
  16         "movb %%dl,%2\n\t" \
  17         "movb %%dh,%3" \
  18         :"=&d" (__pr) \
  19         :"m" (*((addr)+2)), \
  20          "m" (*((addr)+4)), \
  21          "m" (*((addr)+7)), \
  22          "0" (base) \
  23         ); } while (0)
  24
  25 #define _set_limit(addr, limit) do { unsigned long __lr; \
  26 __asm__ __volatile__ ("movw %%dx,%1\n\t" \
  27         "rorl $16,%%edx\n\t" \
  28         "movb %2,%%dh\n\t" \
  29         "andb $0xf0,%%dh\n\t" \
  30         "orb %%dh,%%dl\n\t" \
  31         "movb %%dl,%2" \
  32         :"=&d" (__lr) \
  33         :"m" (*(addr)), \
  34          "m" (*((addr)+6)), \
  35          "0" (limit) \
  36         ); } while (0)
  37
  38 #define set_base(ldt, base) _set_base(((char *)&(ldt)) , (base))
  39 #define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
  40
  41 /*
  42  * Load a segment. Fall back on loading the zero
  43  * segment if something goes wrong..
  44  */
  45 #define loadsegment(seg, value)                 \
  46         asm volatile("\n"                       \
  47                 "1:\t"                          \
  48                 "movl %k0,%%" #seg "\n"         \
  49                 "2:\n"                          \
  50                 ".section .fixup,\"ax\"\n"      \
  51                 "3:\t"                          \
  52                 "movl %k1, %%" #seg "\n\t"      \
  53                 "jmp 2b\n"                      \
  54                 ".previous\n"                   \
  55                 ".section __ex_table,\"a\"\n\t" \
  56                 _ASM_ALIGN "\n\t"               \
  57                 _ASM_PTR " 1b,3b\n"             \
  58                 ".previous"                     \
  59                 : :"r" (value), "r" (0))
  60
  61
  62 /*
  63  * Save a segment register away
  64  */
  65 #define savesegment(seg, value) \
  66         asm volatile("mov %%" #seg ",%0":"=rm" (value))
  67
  68 static inline unsigned long get_limit(unsigned long segment)
  69 {
  70         unsigned long __limit;
  71         __asm__("lsll %1,%0"
  72                 :"=r" (__limit):"r" (segment));
  73         return __limit+1;
  74 }
  75 #endif /* __KERNEL__ */
  76
  77 static inline void clflush(void *__p)
  78 {
  79         asm volatile("clflush %0" : "+m" (*(char __force *)__p));
  80 }
  81
  82 #define nop() __asm__ __volatile__ ("nop")
  83
  84 void disable_hlt(void);
  85 void enable_hlt(void);
  86
  87 extern int es7000_plat;
  88 void cpu_idle_wait(void);
  89
  90 extern unsigned long arch_align_stack(unsigned long sp);
  91 extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
  92
  93 void default_idle(void);
  94
  95 #endif