LXR linux/arch/x86/include/asm/bios

   1#ifndef _ASM_X86_BIOS_EBDA_H
   2#define _ASM_X86_BIOS_EBDA_H
   3
   4#include <asm/io.h>
   5
   6/*
   7 * Returns physical address of EBDA.  Returns 0 if there is no EBDA.
   8 */
   9static inline unsigned int get_bios_ebda(void)
  10{
  11        /*
  12         * There is a real-mode segmented pointer pointing to the
  13         * 4K EBDA area at 0x40E.
  14         */
  15        unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
  16        address <<= 4;
  17        return address; /* 0 means none */
  18}
  19
  20void reserve_bios_regions(void);
  21
  22#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
  23/*
  24 * This is obviously not a great place for this, but we want to be
  25 * able to scatter it around anywhere in the kernel.
  26 */
  27void check_for_bios_corruption(void);
  28void start_periodic_check_for_corruption(void);
  29#else
  30static inline void check_for_bios_corruption(void)
  31{
  32}
  33
  34static inline void start_periodic_check_for_corruption(void)
  35{
  36}
  37#endif
  38
  39#endif /* _ASM_X86_BIOS_EBDA_H */
  40