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 */ 37