314 lines
6.8 KiB
C
314 lines
6.8 KiB
C
/* $NetBSD: bootxx.c,v 1.1.1.1 1996/02/29 11:35:05 leo Exp $ */
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/*
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* Copyright (c) 1995 Waldi Ravens.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Waldi Ravens.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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asm(" .text
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.even
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start:
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bras _bootxx
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");
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#define boot_BSD bsd_startup
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#include <stand.h>
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#include <string.h>
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#include <libkern.h>
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#include <kparamb.h>
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#include <sys/exec.h>
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#include <sys/reboot.h>
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#include <machine/cpu.h>
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#include "bootxx.h"
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void boot_BSD __P((kparb *)__attribute__((noreturn)));
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int load_BSD __P((osdsc *));
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int sys_info __P((osdsc *));
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int usr_info __P((osdsc *));
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int
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bootxx(readsector, disklabel, autoboot)
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void *readsector,
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*disklabel;
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int autoboot;
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{
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static osdsc os_desc;
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extern char end[], edata[];
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osdsc *od = &os_desc;
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bzero(edata, end - edata);
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printf("\033v\nNetBSD/Atari boot loader ($Revision: 1.1.1.1 $)\n\n");
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if (init_dskio(readsector, disklabel, -1))
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return(-1);
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if (sys_info(od))
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return(-2);
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for (;;) {
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od->rootfs = 0; /* partition a */
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od->osname = "/netbsd";
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od->ostype = &od->osname[1];
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od->boothowto = (RB_RDONLY);
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if (!autoboot) {
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int pref;
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od->boothowto = (RB_RDONLY|RB_SINGLE);
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pref = usr_info(od);
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if (pref < 0)
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continue;
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if (pref > 0)
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return(pref);
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}
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autoboot = 0; /* in case auto boot fails */
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if (init_dskio(readsector, disklabel, od->rootfs))
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continue;
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if (load_BSD(od))
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continue;
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boot_BSD(&od->kp);
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}
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/* NOTREACHED */
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}
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int
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sys_info(od)
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osdsc *od;
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{
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long *jar;
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int tos;
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od->stmem_size = *ADDR_PHYSTOP;
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if (*ADDR_CHKRAMTOP == RAMTOP_MAGIC) {
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od->ttmem_size = *ADDR_RAMTOP;
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if (od->ttmem_size > TTRAM_BASE) {
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od->ttmem_size -= TTRAM_BASE;
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od->ttmem_start = TTRAM_BASE;
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}
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}
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tos = (*ADDR_SYSBASE)->os_version;
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if ((tos > 0x300) && (tos < 0x306))
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od->cputype = ATARI_CLKBROKEN;
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if ((jar = *ADDR_P_COOKIE)) {
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while (jar[0]) {
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if (jar[0] == 0x5f435055L) { /* _CPU */
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switch(jar[1]) {
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case 0:
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od->cputype |= ATARI_68000;
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break;
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case 10:
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od->cputype |= ATARI_68010;
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break;
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case 20:
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od->cputype |= ATARI_68020;
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break;
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case 30:
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od->cputype |= ATARI_68030;
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break;
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case 40:
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od->cputype |= ATARI_68040;
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break;
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}
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}
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jar += 2;
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}
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}
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if (!(od->cputype & ATARI_ANYCPU)) {
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printf("Unknown CPU-type.\n");
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return(-1);
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}
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return(0);
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}
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int
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usr_info(od)
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osdsc *od;
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{
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static char line[800];
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char c, *p = line;
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printf("\nEnter os-type [.%s] root-fs [:a] kernel [%s]"
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" options [none]:\n\033e", od->ostype, od->osname);
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gets(p);
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printf("\033f");
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for (;;) {
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while (isspace(*p))
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*p++ = '\0';
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switch (*p++) {
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case '\0':
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goto done;
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case ':':
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if ((c = *p) >= 'a' && c <= 'z')
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od->rootfs = c - 'a';
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else if (c >= 'A' && c <= 'Z')
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od->rootfs = c - ('A' - 27);
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else return(-1);
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if (!od->rootfs)
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break;
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*p = 'b';
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/* FALLTHROUGH */
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case '-':
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if ((c = *p) == 'a')
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od->boothowto &= ~RB_SINGLE;
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else if (c == 'b')
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od->boothowto |= RB_ASKNAME;
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else if (c == 'd')
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od->boothowto |= RB_KDB;
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else return(-1);
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break;
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case '.':
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od->ostype = p;
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break;
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case '/':
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od->osname = --p;
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break;
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default:
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return(-1);
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}
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while ((c = *p) && !isspace(c))
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p += 1;
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}
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done:
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c = od->ostype[0];
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if (isupper(c))
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c = tolower(c);
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switch (c) {
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case 'n': /* NetBSD */
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return(0);
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case 'l': /* Linux */
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return(0x10);
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case 'a': /* ASV */
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return(0x40);
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case 't': /* TOS */
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return(0x80);
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default:
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return(-1);
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}
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}
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int
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load_BSD(od)
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osdsc *od;
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{
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struct exec hdr;
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int err, fd;
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u_int textsz, strsz;
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/*
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* Read kernel's exec-header.
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*/
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err = 1;
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if ((fd = open(od->osname, 0)) < 0)
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goto error;
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err = 2;
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if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr))
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goto error;
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err = 3;
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if (N_GETMAGIC(hdr) != NMAGIC)
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goto error;
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/*
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* Extract sizes from kernel executable.
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*/
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textsz = (hdr.a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1);
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od->ksize = textsz + hdr.a_data + hdr.a_bss;
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od->kentry = hdr.a_entry;
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od->kstart = NULL;
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od->k_esym = 0;
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if (hdr.a_syms) {
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u_int x = sizeof(hdr) + hdr.a_text + hdr.a_data + hdr.a_syms;
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err = 8;
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if (lseek(fd, (off_t)x, SEEK_SET) != x)
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goto error;
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err = 9;
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if (read(fd, &strsz, sizeof(strsz)) != sizeof(strsz))
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goto error;
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err = 10;
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if (lseek(fd, (off_t)sizeof(hdr), SEEK_SET) != sizeof(hdr))
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goto error;
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od->ksize += sizeof(strsz) + hdr.a_syms + strsz;
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}
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/*
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* Read text & data, clear bss
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*/
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err = 16;
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if ((od->kstart = alloc(od->ksize)) == NULL)
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goto error;
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err = 17;
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if (read(fd, od->kstart, hdr.a_text) != hdr.a_text)
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goto error;
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err = 18;
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if (read(fd, od->kstart + textsz, hdr.a_data) != hdr.a_data)
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goto error;
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bzero(od->kstart + textsz + hdr.a_data, hdr.a_bss);
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/*
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* Read symbol and string table
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*/
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if (hdr.a_syms) {
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char *p = od->kstart + textsz + hdr.a_data + hdr.a_bss;
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*((u_int32_t *)p)++ = hdr.a_syms;
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err = 24;
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if (read(fd, p, hdr.a_syms) != hdr.a_syms)
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goto error;
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p += hdr.a_syms;
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err = 25;
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if (read(fd, p, strsz) != strsz)
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goto error;
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od->k_esym = (p - (char *)od->kstart) + strsz;
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}
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return(0);
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error:
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if (fd >= 0) {
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if (od->kstart)
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free(od->kstart, od->ksize);
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close(fd);
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}
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printf("Error %d in load_BSD.\n", err);
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return(-1);
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}
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