| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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); |
| 23 | extern void __nvram_set_checksum(void); |
| 24 | extern void nvram_set_checksum(void); |
| 25 | #endif |
| 26 | |
| 27 | #endif /* _LINUX_NVRAM_H */ |