diff options
Diffstat (limited to 'arch/x86/include/asm/bios_ebda.h')
-rw-r--r-- | arch/x86/include/asm/bios_ebda.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/x86/include/asm/bios_ebda.h b/arch/x86/include/asm/bios_ebda.h new file mode 100644 index 0000000..79b4b88 --- /dev/null +++ b/arch/x86/include/asm/bios_ebda.h @@ -0,0 +1,36 @@ +#ifndef ASM_X86__BIOS_EBDA_H +#define ASM_X86__BIOS_EBDA_H + +#include <asm/io.h> + +/* + * there is a real-mode segmented pointer pointing to the + * 4K EBDA area at 0x40E. + */ +static inline unsigned int get_bios_ebda(void) +{ + unsigned int address = *(unsigned short *)phys_to_virt(0x40E); + address <<= 4; + return address; /* 0 means none */ +} + +void reserve_ebda_region(void); + +#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION +/* + * This is obviously not a great place for this, but we want to be + * able to scatter it around anywhere in the kernel. + */ +void check_for_bios_corruption(void); +void start_periodic_check_for_corruption(void); +#else +static inline void check_for_bios_corruption(void) +{ +} + +static inline void start_periodic_check_for_corruption(void) +{ +} +#endif + +#endif /* ASM_X86__BIOS_EBDA_H */ |