linux/include/asm-x86/bios_ebda.h

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#ifndef _MACH_BIOS_EBDA_H
#define _MACH_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);
#endif /* _MACH_BIOS_EBDA_H */