diff options
Diffstat (limited to 'include/linux/nvram.h')
| -rw-r--r-- | include/linux/nvram.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/nvram.h b/include/linux/nvram.h new file mode 100644 index 000000000000..b031e41b5e0d --- /dev/null +++ b/include/linux/nvram.h @@ -0,0 +1,27 @@ +#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); +extern void __nvram_set_checksum(void); +extern void nvram_set_checksum(void); +#endif + +#endif /* _LINUX_NVRAM_H */ |