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Diffstat (limited to 'system/alpha/h/bbram.h')
| -rw-r--r-- | system/alpha/h/bbram.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/system/alpha/h/bbram.h b/system/alpha/h/bbram.h new file mode 100644 index 000000000..5b29c57b4 --- /dev/null +++ b/system/alpha/h/bbram.h @@ -0,0 +1,101 @@ +#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 */ |