[mirror_ubuntu-artful-kernel.git] / include / linux / nvram.h

#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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_NVRAM_H
	2	#define _LINUX_NVRAM_H
	3
	4	#include <linux/ioctl.h>
	5
	6	/* /dev/nvram ioctls */
	7	#define NVRAM_INIT _IO('p', 0x40) /* initialize NVRAM and set checksum */
	8	#define NVRAM_SETCKS _IO('p', 0x41) /* recalculate checksum */
	9
	10	/* for all current systems, this is where NVRAM starts */
	11	#define NVRAM_FIRST_BYTE 14
	12	/* all these functions expect an NVRAM offset, not an absolute */
	13	#define NVRAM_OFFSET(x) ((x)-NVRAM_FIRST_BYTE)
	14
	15	#ifdef __KERNEL__
	16	/* __foo is foo without grabbing the rtc_lock - get it yourself */
	17	extern unsigned char __nvram_read_byte(int i);
	18	extern unsigned char nvram_read_byte(int i);
	19	extern void __nvram_write_byte(unsigned char c, int i);
	20	extern void nvram_write_byte(unsigned char c, int i);
	21	extern int __nvram_check_checksum(void);
	22	extern int nvram_check_checksum(void);
1da177e4 LT	23	#endif
	24
	25	#endif /* _LINUX_NVRAM_H */