mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 16:36:42 +07:00
0c51a965ed
This patch extracts the common part of head32.c and head64.c into head.c. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: andi@firstfloor.org Cc: mingo@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
20 lines
397 B
C
20 lines
397 B
C
#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 */
|