1/* $NetBSD: bootxx.c,v 1.25 2009/10/26 19:16:57 cegger 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 43int debug; 44int netif_debug; 45 46/* 47 * Boot device is derived from ROM provided information. 48 */ 49const char progname[] = "bootxx"; 50struct 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 */ 58struct shared_bbinfo bbinfo = { 59 { SPARC_BBINFO_MAGIC }, 60 0, 61 SHARED_BBINFO_MAXBLOCKS, 62 { 0 } 63}; 64 65int main(void); 66void loadboot(struct open_file *, char *); 67 68int 69main(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 100void 101loadboot(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