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      1 /*	$NetBSD: bootxx.c,v 1.26 2015/10/08 20:58:13 joerg Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/exec.h>
     34 #include <sys/exec_aout.h>
     35 #include <sys/bootblock.h>
     36 
     37 #include <lib/libkern/libkern.h>
     38 #include <lib/libsa/stand.h>
     39 
     40 #include <machine/promlib.h>
     41 #include <sparc/stand/common/promdev.h>
     42 
     43 int debug;
     44 int netif_debug;
     45 
     46 /*
     47  * Boot device is derived from ROM provided information.
     48  */
     49 const char		progname[] = "bootxx";
     50 struct open_file	io;
     51 
     52 /*
     53  * The contents of the bbinfo below are set by installboot(8)
     54  * to hold the filesystem data of the second-stage boot program
     55  * (typically `/boot'): filesystem block size, # of filesystem
     56  * blocks and the block numbers themselves.
     57  */
     58 struct shared_bbinfo bbinfo = {
     59 	{ SPARC_BBINFO_MAGIC },
     60 	0,
     61 	SHARED_BBINFO_MAXBLOCKS,
     62 	{ 0 }
     63 };
     64 
     65 int	main(void);
     66 void	loadboot(struct open_file *, char *);
     67 
     68 int
     69 main(void)
     70 {
     71 	char	*dummy1;
     72 	const char	*dummy;
     73 	void (*entry)(void *) = (void (*)(void *))PROM_LOADADDR;
     74 	void	*arg;
     75 
     76 #ifdef HEAP_VARIABLE
     77 	{
     78 		extern char end[];
     79 		setheap((void *)ALIGN(end), (void *)0xffffffff);
     80 	}
     81 #endif
     82 	prom_init();
     83 	dummy = prom_getbootpath();
     84 	if (dummy && *dummy != '\0')
     85 		strcpy(prom_bootdevice, dummy);
     86 	io.f_flags = F_RAW;
     87 	if (devopen(&io, 0, &dummy1)) {
     88 		panic("%s: can't open device `%s'", progname,
     89 			prom_bootdevice[0] ? prom_bootdevice : "unknown");
     90 	}
     91 
     92 	(void)loadboot(&io, (void *)PROM_LOADADDR);
     93 	(io.f_dev->dv_close)(&io);
     94 
     95 	arg = (prom_version() == PROM_OLDMON) ? (void *)PROM_LOADADDR : romp;
     96 	(*entry)(arg);
     97 	_rtt();
     98 }
     99 
    100 void
    101 loadboot(struct open_file *f, char *addr)
    102 {
    103 	int	i;
    104 	char	*buf;
    105 	size_t		n;
    106 	daddr_t		blk;
    107 
    108 	/*
    109 	 * Allocate a buffer that we can map into DVMA space; only
    110 	 * needed for sun4 architecture, but use it for all machines
    111 	 * to keep code size down as much as possible.
    112 	 */
    113 	buf = alloc(bbinfo.bbi_block_size);
    114 	if (buf == NULL)
    115 		panic("%s: alloc failed", progname);
    116 
    117 	for (i = 0; i < bbinfo.bbi_block_count; i++) {
    118 		if ((blk = bbinfo.bbi_block_table[i]) == 0)
    119 			panic("%s: block table corrupt", progname);
    120 
    121 #ifdef DEBUG
    122 		printf("%s: block # %d = %d\n", progname, i, blk);
    123 #endif
    124 		if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ, blk,
    125 		    bbinfo.bbi_block_size, buf, &n)) {
    126 			printf("%s: read failure", progname);
    127 			_rtt();
    128 		}
    129 		memcpy(addr, buf, bbinfo.bbi_block_size);
    130 		if (n != bbinfo.bbi_block_size)
    131 			panic("%s: short read", progname);
    132 		if (i == 0) {
    133 			int m = N_GETMAGIC(*(struct exec *)addr);
    134 			if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
    135 				/* Move exec header out of the way */
    136 				memcpy(addr - sizeof(struct exec), addr, n);
    137 				addr -= sizeof(struct exec);
    138 			}
    139 		}
    140 		addr += n;
    141 	}
    142 
    143 }
    144