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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_BIOS_EBDA_H
#define _ASM_X86_BIOS_EBDA_H
#include <asm/io.h>
/*
* Returns physical address of EBDA. Returns 0 if there is no EBDA.
*/
static inline unsigned int get_bios_ebda(void)
{
/*
* There is a real-mode segmented pointer pointing to the
* 4K EBDA area at 0x40E.
*/
unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
address <<= 4;
return address; /* 0 means none */
}
void reserve_bios_regions(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 */