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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_NVRAM_H |
| 2 | #define _LINUX_NVRAM_H |
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| 3 | |||
| 4 | #include <linux/ioctl.h> |
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| 5 | |||
| 6 | /* /dev/nvram ioctls */ |
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| 7 | #define NVRAM_INIT _IO('p', 0x40) /* initialize NVRAM and set checksum */ |
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| 8 | #define NVRAM_SETCKS _IO('p', 0x41) /* recalculate checksum */ |
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| 9 | |||
| 10 | /* for all current systems, this is where NVRAM starts */ |
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| 11 | #define NVRAM_FIRST_BYTE 14 |
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| 12 | /* all these functions expect an NVRAM offset, not an absolute */ |
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| 13 | #define NVRAM_OFFSET(x) ((x)-NVRAM_FIRST_BYTE) |
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| 14 | |||
| 15 | #ifdef __KERNEL__ |
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| 16 | /* __foo is foo without grabbing the rtc_lock - get it yourself */ |
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| 17 | extern unsigned char __nvram_read_byte(int i); |
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| 18 | extern unsigned char nvram_read_byte(int i); |
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| 19 | extern void __nvram_write_byte(unsigned char c, int i); |
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| 20 | extern void nvram_write_byte(unsigned char c, int i); |
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| 21 | extern int __nvram_check_checksum(void); |
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| 22 | extern int nvram_check_checksum(void); |
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| 23 | extern void __nvram_set_checksum(void); |
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| 24 | extern void nvram_set_checksum(void); |
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| 25 | #endif |
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| 26 | |||
| 27 | #endif /* _LINUX_NVRAM_H */ |