arch/x86/include/asm/bios_ebda.h

   1 #ifndef ASM_X86__BIOS_EBDA_H
   2 #define ASM_X86__BIOS_EBDA_H
   3
   4 #include <asm/io.h>
   5
   6 /*
   7  * there is a real-mode segmented pointer pointing to the
   8  * 4K EBDA area at 0x40E.
   9  */
  10 static inline unsigned int get_bios_ebda(void)
  11 {
  12         unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
  13         address <<= 4;
  14         return address; /* 0 means none */
  15 }
  16
  17 void reserve_ebda_region(void);
  18
  19 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
  20 /*
  21  * This is obviously not a great place for this, but we want to be
  22  * able to scatter it around anywhere in the kernel.
  23  */
  24 void check_for_bios_corruption(void);
  25 void start_periodic_check_for_corruption(void);
  26 #else
  27 static inline void check_for_bios_corruption(void)
  28 {
  29 }
  30
  31 static inline void start_periodic_check_for_corruption(void)
  32 {
  33 }
  34 #endif
  35
  36 #endif /* ASM_X86__BIOS_EBDA_H */