Release 4.14 arch/x86/include/asm/bios_ebda.h

/* 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 */
}

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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)
{
}

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static inline void start_periodic_check_for_corruption(void)
{
}
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#endif

#endif /* _ASM_X86_BIOS_EBDA_H */
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Directory: arch/x86/include/asm

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