[deliverable/linux.git] / include / asm-x86 / bios_ebda.h

#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 */
Commit	Line	Data
77ef50a5 VN	1	#ifndef ASM_X86__BIOS_EBDA_H
77ef50a5 VN	2	#define ASM_X86__BIOS_EBDA_H
1da177e4	3
2c0903f2 AM	4	#include <asm/io.h>
2c0903f2 AM	5
1da177e4 LT	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
0c51a965 HY	17	void reserve_ebda_region(void);
0c51a965 HY	18
46eaa670 IM	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
77ef50a5	36	#endif /* ASM_X86__BIOS_EBDA_H */