| #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 */ |
