mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
26 lines
844 B
C
26 lines
844 B
C
|
#ifndef _LINUX_NVRAM_H
|
||
|
|
#define _LINUX_NVRAM_H
|
||
|
|
|
||
|
|
#include <linux/ioctl.h>
|
||
|
|
|
||
|
|
/* /dev/nvram ioctls */
|
||
|
|
#define NVRAM_INIT _IO('p', 0x40) /* initialize NVRAM and set checksum */
|
||
|
|
#define NVRAM_SETCKS _IO('p', 0x41) /* recalculate checksum */
|
||
|
|
|
||
|
|
/* for all current systems, this is where NVRAM starts */
|
||
|
|
#define NVRAM_FIRST_BYTE 14
|
||
|
|
/* all these functions expect an NVRAM offset, not an absolute */
|
||
|
|
#define NVRAM_OFFSET(x) ((x)-NVRAM_FIRST_BYTE)
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
/* __foo is foo without grabbing the rtc_lock - get it yourself */
|
||
|
|
extern unsigned char __nvram_read_byte(int i);
|
||
|
|
extern unsigned char nvram_read_byte(int i);
|
||
|
|
extern void __nvram_write_byte(unsigned char c, int i);
|
||
|
|
extern void nvram_write_byte(unsigned char c, int i);
|
||
|
|
extern int __nvram_check_checksum(void);
|
||
|
|
extern int nvram_check_checksum(void);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _LINUX_NVRAM_H */
|