26 lines
844 B
C
26 lines
844 B
C
#ifndef _LINUX_NVRAM_H
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#define _LINUX_NVRAM_H
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#include <linux/ioctl.h>
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/* /dev/nvram ioctls */
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#define NVRAM_INIT _IO('p', 0x40) /* initialize NVRAM and set checksum */
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#define NVRAM_SETCKS _IO('p', 0x41) /* recalculate checksum */
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/* for all current systems, this is where NVRAM starts */
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#define NVRAM_FIRST_BYTE 14
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/* all these functions expect an NVRAM offset, not an absolute */
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#define NVRAM_OFFSET(x) ((x)-NVRAM_FIRST_BYTE)
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#ifdef __KERNEL__
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/* __foo is foo without grabbing the rtc_lock - get it yourself */
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extern unsigned char __nvram_read_byte(int i);
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extern unsigned char nvram_read_byte(int i);
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extern void __nvram_write_byte(unsigned char c, int i);
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extern void nvram_write_byte(unsigned char c, int i);
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extern int __nvram_check_checksum(void);
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extern int nvram_check_checksum(void);
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#endif
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#endif /* _LINUX_NVRAM_H */
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