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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/nvram.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/nvram.h')
-rw-r--r--include/linux/nvram.h27
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 */