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1 files changed, 101 insertions, 0 deletions

diff --git a/system/alpha/h/bbram.h b/system/alpha/h/bbram.h
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+++ b/system/alpha/h/bbram.h
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+#ifndef __BBRAM_H_LOADED
+#define __BBRAM_H_LOADED
+/*****************************************************************************
+
+       Copyright © 1993, 1994 Digital Equipment Corporation,
+                       Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted, provided
+that the copyright notice and this permission notice appear in all copies
+of software and supporting documentation, and that the name of Digital not
+be used in advertising or publicity pertaining to distribution of the software
+without specific, written prior permission. Digital grants this permission
+provided that you prominently mark, as not part of the original, any
+modifications made to this software or documentation.
+
+Digital Equipment Corporation disclaims all warranties and/or guarantees
+with regard to this software, including all implied warranties of fitness for
+a particular purpose and merchantability, and makes no representations
+regarding the use of, or the results of the use of, the software and
+documentation in terms of correctness, accuracy, reliability, currentness or
+otherwise; and you rely on the software, documentation and results solely at
+your own risk.
+
+******************************************************************************/
+
+/*
+ *  $Id: bbram.h,v 1.1.1.1 1997/10/30 23:27:14 verghese Exp $;
+ */
+
+/*
+ * $Log: bbram.h,v $
+ * Revision 1.1.1.1  1997/10/30 23:27:14  verghese
+ * current 10/29/97
+ *
+ * Revision 1.1  1995/06/23  16:13:56  berc
+ * Initial revision
+ *
+ * Revision 1.6  1995/02/10  02:20:00  fdh
+ * Added definitions for OSTYPE location in battary backed RAM.
+ *
+ * Revision 1.5  1994/08/05  20:13:47  fdh
+ * Updated Copyright header and RCS $Id: identifier.
+ *
+ * Revision 1.4  1994/07/11  19:46:38  fdh
+ * Remove typecast used on the value set by the BBRAM_READ macro.
+ *
+ * Revision 1.3  1994/06/22  15:10:20  rusling
+ * Fixed up WNT compile warnings.
+ *
+ * Revision 1.2  1994/06/20  14:18:59  fdh
+ * Fixup header file preprocessor #include conditionals.
+ *
+ * Revision 1.1  1994/03/16  00:13:48  fdh
+ * Initial revision
+ *
+ */
+
+
+/*
+ * The TOY clock contains some BBRAM that we can use to
+ * store useful stuff.  The BBRAM that is available to us
+ * is in bytes 14-127.
+ *
+ * Currently, we use:
+ *
+ * Bytes	Contents
+ *
+ * 14:18	bootadr + pattern
+ * 21:22	rmode + pattern
+ * 23:30 	default mac address + 2 bytes of checksum.
+ *
+ * Below some macros and offsets are defined to make programming
+ * this area easier.
+ */
+
+#define BBRAM_BASE	14
+
+#define BBRAM_READ(offset,value)	\
+        {				\
+        outportb(RTCADDR, BBRAM_BASE + (offset));		\
+        (value) = inportb(RTCDATA) & 0xFF;	\
+        }
+
+#define BBRAM_WRITE(offset,value)	\
+        {				\
+        outportb(RTCADDR, BBRAM_BASE + (offset));		\
+        outportb(RTCDATA, (value) & 0xFF);			\
+        }
+
+#define BBRAM_BOOTADR		0
+#define BBRAM_BOOTADR_COOKIE	0xA1
+#define BBRAM_RMODE		7
+#define BBRAM_RMODE_COOKIE	0x1B
+#define BBRAM_MACADDR		9
+#define BBRAM_MACADDR_COOKIE	0x1C
+#define BBRAM_OSTYPE		(0x3f-BBRAM_BASE)
+
+#endif /* __BBRAM_H_LOADED */