81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* $NetBSD: prom.h,v 1.1 1995/02/13 23:07:48 cgd Exp $ */
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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Keith Bostic, Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef ASSEMBLER
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struct prom_vec {
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int (*routine)();
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struct crd *routine_arg;
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};
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/* The return value from a prom call. */
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typedef union {
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struct {
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u_int64_t
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retval : 32, /* return value. */
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unit : 8,
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mbz : 8,
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error : 13,
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status : 3;
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} u;
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u_int64_t bits;
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} prom_return_t;
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#ifdef STANDALONE
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int getchar __P((void));
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int prom_open __P((char *, int));
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void putchar __P((int));
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#endif
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int prom_getenv __P((int, char *, int));
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#endif
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/* Prom operation values. */
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#define PROM_R_CLOSE 0x11
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#define PROM_R_GETC 0x01
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#define PROM_R_GETENV 0x22
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#define PROM_R_OPEN 0x10
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#define PROM_R_PUTS 0x02
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#define PROM_R_READ 0x13
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/* Environment variable values. */
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#define PROM_E_BOOTED_DEV 0x4
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#define PROM_E_BOOTED_FILE 0x6
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#define PROM_E_BOOTED_OSFLAGS 0x8
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#define PROM_E_TTY_DEV 0xf
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/*
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* There have to be stub routines to do the copying that ensures that the
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* PROM doesn't get called with an address larger than 32 bits. Calls that
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* either don't need to copy anything, or don't need the copy because it's
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* already being done elsewhere, are defined here.
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*/
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#define prom_close(chan) prom_dispatch(PROM_R_CLOSE, chan)
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#define prom_read(chan, len, buf, blkno) \
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prom_dispatch(PROM_R_READ, chan, len, buf, blkno)
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