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 */