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promlib.c revision 1.1.78.1
      1  1.1.78.1  yamt /*	$NetBSD: promlib.c,v 1.1.78.1 2008/05/18 12:32:51 yamt Exp $ */
      2       1.1   cdi 
      3       1.1   cdi /*-
      4       1.1   cdi  * Copyright (c) 2005 The NetBSD Foundation, Inc.
      5       1.1   cdi  * All rights reserved.
      6       1.1   cdi  *
      7       1.1   cdi  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1   cdi  * by Paul Kranenburg.
      9       1.1   cdi  *
     10       1.1   cdi  * Redistribution and use in source and binary forms, with or without
     11       1.1   cdi  * modification, are permitted provided that the following conditions
     12       1.1   cdi  * are met:
     13       1.1   cdi  * 1. Redistributions of source code must retain the above copyright
     14       1.1   cdi  *    notice, this list of conditions and the following disclaimer.
     15       1.1   cdi  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1   cdi  *    notice, this list of conditions and the following disclaimer in the
     17       1.1   cdi  *    documentation and/or other materials provided with the distribution.
     18       1.1   cdi  *
     19       1.1   cdi  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.1   cdi  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.1   cdi  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.1   cdi  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.1   cdi  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.1   cdi  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.1   cdi  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.1   cdi  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.1   cdi  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.1   cdi  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.1   cdi  * POSSIBILITY OF SUCH DAMAGE.
     30       1.1   cdi  */
     31       1.1   cdi 
     32       1.1   cdi /*
     33       1.1   cdi  * OPENPROM functions.  These are here mainly to hide the OPENPROM interface
     34       1.1   cdi  * from the rest of the kernel.
     35       1.1   cdi  */
     36       1.1   cdi 
     37       1.1   cdi #include <sys/types.h>
     38       1.1   cdi #include <machine/promlib.h>
     39       1.1   cdi 
     40       1.1   cdi #include "openfirm.h"
     41       1.1   cdi 
     42       1.1   cdi 
     43       1.1   cdi void *romp;
     44       1.1   cdi struct promops	promops;
     45       1.1   cdi 
     46       1.1   cdi 
     47       1.1   cdi static void
     48       1.1   cdi openfirmware_fatal(void)
     49       1.1   cdi {
     50       1.1   cdi 	printf("Invalid Openfirmware environment\n");
     51       1.1   cdi 	exit(0);
     52       1.1   cdi }
     53       1.1   cdi 
     54       1.1   cdi static int
     55       1.1   cdi openfirmware_chosen(void)
     56       1.1   cdi {
     57       1.1   cdi 	static int phandle = -1;
     58       1.1   cdi 
     59       1.1   cdi 	if (phandle == -1) {
     60       1.1   cdi 		if ( (phandle = OF_finddevice("/chosen")) == -1) {
     61       1.1   cdi 			exit(0);
     62       1.1   cdi 		}
     63       1.1   cdi 	}
     64       1.1   cdi 
     65       1.1   cdi 	return (phandle);
     66       1.1   cdi }
     67       1.1   cdi 
     68       1.1   cdi static const char*
     69       1.1   cdi openfirmware_bootpath(void)
     70       1.1   cdi {
     71       1.1   cdi 	static char bootpath[PROM_MAX_PATH];
     72       1.1   cdi 
     73       1.1   cdi 	if (_prom_getprop(openfirmware_chosen(), "bootpath", bootpath,
     74       1.1   cdi 				sizeof(bootpath)) < 0) {
     75       1.1   cdi 		openfirmware_fatal();
     76       1.1   cdi 	}
     77       1.1   cdi 
     78       1.1   cdi 	return bootpath;
     79       1.1   cdi }
     80       1.1   cdi 
     81       1.1   cdi static const char*
     82       1.1   cdi openfirmware_bootfile(void)
     83       1.1   cdi {
     84       1.1   cdi 	/* Default image name */
     85       1.1   cdi 	return "netbsd";
     86       1.1   cdi }
     87       1.1   cdi 
     88       1.1   cdi static const char*
     89       1.1   cdi openfirmware_bootargs(void)
     90       1.1   cdi {
     91       1.1   cdi 	static char bootargs[PROM_MAX_PATH * 2];
     92       1.1   cdi 
     93       1.1   cdi 	if (_prom_getprop(openfirmware_chosen(), "bootargs", bootargs,
     94       1.1   cdi 				sizeof(bootargs)) < 0) {
     95       1.1   cdi 		openfirmware_fatal();
     96       1.1   cdi 	}
     97       1.1   cdi 
     98       1.1   cdi 	return bootargs;
     99       1.1   cdi }
    100       1.1   cdi 
    101       1.1   cdi static int
    102       1.1   cdi openfirmware_getchar(void)
    103       1.1   cdi {
    104       1.1   cdi 	unsigned char ch = '\0';
    105       1.1   cdi 	int l;
    106       1.1   cdi 
    107       1.1   cdi 	while ((l = OF_read(prom_stdin(), &ch, 1)) != 1)
    108       1.1   cdi 		if (l != -2 && l != 0)
    109       1.1   cdi 			return -1;
    110       1.1   cdi 	return ch;
    111       1.1   cdi }
    112       1.1   cdi 
    113       1.1   cdi static void
    114       1.1   cdi openfirmware_putchar(int c)
    115       1.1   cdi {
    116       1.1   cdi 	char ch = c;
    117       1.1   cdi 
    118       1.1   cdi 	if (c == '\n')
    119       1.1   cdi 		putchar('\r');
    120       1.1   cdi 	OF_write(prom_stdout(), &ch, 1);
    121       1.1   cdi }
    122       1.1   cdi 
    123       1.1   cdi void
    124       1.1   cdi prom_halt(void)
    125       1.1   cdi {
    126       1.1   cdi 	_prom_halt();
    127       1.1   cdi }
    128       1.1   cdi 
    129       1.1   cdi int
    130       1.1   cdi prom_findroot(void)
    131       1.1   cdi {
    132       1.1   cdi 	return OF_peer(0);
    133       1.1   cdi }
    134       1.1   cdi 
    135       1.1   cdi void
    136       1.1   cdi prom_init(void)
    137       1.1   cdi {
    138       1.1   cdi 	int phandle, size;
    139       1.1   cdi 
    140       1.1   cdi 	OF_initialize();
    141       1.1   cdi 
    142       1.1   cdi 	memset(promops, 0, sizeof(promops));
    143       1.1   cdi 
    144       1.1   cdi 	/* Access to boot arguments */
    145       1.1   cdi 	promops.po_bootpath = openfirmware_bootpath;
    146       1.1   cdi 	promops.po_bootfile = openfirmware_bootfile;
    147       1.1   cdi 	promops.po_bootargs = openfirmware_bootargs;
    148       1.1   cdi 
    149       1.1   cdi 	/* I/O functions */
    150       1.1   cdi 	promops.po_getchar = openfirmware_getchar;
    151       1.1   cdi 	promops.po_putchar = openfirmware_putchar;
    152       1.1   cdi 	promops.po_open  = OF_open;
    153       1.1   cdi 	promops.po_close = OF_close;
    154       1.1   cdi 	promops.po_read  = OF_read;
    155       1.1   cdi 	promops.po_write = OF_write;
    156       1.1   cdi 	promops.po_seek  = OF_seek;
    157       1.1   cdi 
    158       1.1   cdi 	promops.po_instance_to_package = OF_instance_to_package;
    159       1.1   cdi 
    160       1.1   cdi 	/* Program termination control */
    161       1.1   cdi 	promops.po_halt  = OF_exit;
    162       1.1   cdi 	promops.po_abort = OF_enter;
    163       1.1   cdi 	promops.po_ticks = OF_milliseconds;
    164       1.1   cdi 
    165       1.1   cdi 	/* Device node traversal */
    166       1.1   cdi 	promops.po_firstchild  = OF_child;
    167       1.1   cdi 	promops.po_nextsibling = OF_peer;
    168       1.1   cdi 
    169       1.1   cdi 	/* Device node properties */
    170       1.1   cdi 	promops.po_getprop = OF_getprop;
    171       1.1   cdi 
    172       1.1   cdi 	/* Device discovery */
    173       1.1   cdi 	promops.po_finddevice = OF_finddevice;
    174       1.1   cdi 
    175       1.1   cdi 	/* Console I/O */
    176       1.1   cdi 	phandle = openfirmware_chosen();
    177       1.1   cdi 	size = _prom_getprop(phandle, "stdin", &promops.po_stdin,
    178       1.1   cdi 			sizeof(promops.po_stdin));
    179       1.1   cdi 	size += _prom_getprop(phandle, "stdout", &promops.po_stdout,
    180       1.1   cdi 			sizeof(promops.po_stdout));
    181       1.1   cdi 	if (size != (sizeof(promops.po_stdin) + sizeof(promops.po_stdout))) {
    182       1.1   cdi 		prom_halt();
    183       1.1   cdi 	}
    184       1.1   cdi }
    185