xref: /openbmc/linux/include/uapi/linux/nvram.h (revision 6f52b16c)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_NVRAM_H
3 #define _UAPI_LINUX_NVRAM_H
4 
5 #include <linux/ioctl.h>
6 
7 /* /dev/nvram ioctls */
8 #define NVRAM_INIT	_IO('p', 0x40) /* initialize NVRAM and set checksum */
9 #define NVRAM_SETCKS	_IO('p', 0x41) /* recalculate checksum */
10 
11 /* for all current systems, this is where NVRAM starts */
12 #define NVRAM_FIRST_BYTE    14
13 /* all these functions expect an NVRAM offset, not an absolute */
14 #define NVRAM_OFFSET(x)   ((x)-NVRAM_FIRST_BYTE)
15 
16 
17 #endif /* _UAPI_LINUX_NVRAM_H */
18