NetBSD/sys/arch/atari/stand/bootxx/bootxx.c

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/* $NetBSD: bootxx.c,v 1.3 1998/02/10 10:25:08 leo Exp $ */
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/*
* Copyright (c) 1995 Waldi Ravens.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Waldi Ravens.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
asm(" .text
.even
start:
bras _bootxx
");
#define boot_BSD bsd_startup
#include <stand.h>
#include <atari_stand.h>
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#include <string.h>
#include <libkern.h>
#include <kparamb.h>
#include <sys/exec.h>
#include <sys/reboot.h>
#include <machine/cpu.h>
#include "bootxx.h"
void boot_BSD __P((kparb *)__attribute__((noreturn)));
int load_BSD __P((osdsc *));
int sys_info __P((osdsc *));
int usr_info __P((osdsc *));
int
bootxx(readsector, disklabel, autoboot)
void *readsector,
*disklabel;
int autoboot;
{
static osdsc os_desc;
extern char end[], edata[];
osdsc *od = &os_desc;
bzero(edata, end - edata);
printf("\033v\nNetBSD/Atari boot loader ($Revision: 1.3 $)\n\n");
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if (init_dskio(readsector, disklabel, -1))
return(-1);
if (sys_info(od))
return(-2);
for (;;) {
od->rootfs = 0; /* partition a */
od->osname = "/netbsd";
od->ostype = &od->osname[1];
od->boothowto = (RB_RDONLY);
if (!autoboot) {
int pref;
od->boothowto = (RB_RDONLY|RB_SINGLE);
pref = usr_info(od);
if (pref < 0)
continue;
if (pref > 0)
return(pref);
}
autoboot = 0; /* in case auto boot fails */
if (init_dskio(readsector, disklabel, od->rootfs))
continue;
if (load_BSD(od))
continue;
boot_BSD(&od->kp);
}
/* NOTREACHED */
}
int
sys_info(od)
osdsc *od;
{
long *jar;
int tos;
od->stmem_size = *ADDR_PHYSTOP;
if (*ADDR_CHKRAMTOP == RAMTOP_MAGIC) {
od->ttmem_size = *ADDR_RAMTOP;
if (od->ttmem_size > TTRAM_BASE) {
od->ttmem_size -= TTRAM_BASE;
od->ttmem_start = TTRAM_BASE;
}
}
tos = (*ADDR_SYSBASE)->os_version;
if ((tos > 0x300) && (tos < 0x306))
od->cputype = ATARI_CLKBROKEN;
if ((jar = *ADDR_P_COOKIE)) {
while (jar[0]) {
if (jar[0] == 0x5f435055L) { /* _CPU */
switch(jar[1]) {
case 0:
od->cputype |= ATARI_68000;
break;
case 10:
od->cputype |= ATARI_68010;
break;
case 20:
od->cputype |= ATARI_68020;
break;
case 30:
od->cputype |= ATARI_68030;
break;
case 40:
od->cputype |= ATARI_68040;
break;
case 60:
od->cputype |= ATARI_68060;
break;
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}
}
jar += 2;
}
}
if (!(od->cputype & ATARI_ANYCPU)) {
printf("Unknown CPU-type.\n");
return(-1);
}
return(0);
}
int
usr_info(od)
osdsc *od;
{
static char line[800];
char c, *p = line;
printf("\nEnter os-type [.%s] root-fs [:a] kernel [%s]"
" options [none]:\n\033e", od->ostype, od->osname);
gets(p);
printf("\033f");
for (;;) {
while (isspace(*p))
*p++ = '\0';
switch (*p++) {
case '\0':
goto done;
case ':':
if ((c = *p) >= 'a' && c <= 'z')
od->rootfs = c - 'a';
else if (c >= 'A' && c <= 'Z')
od->rootfs = c - ('A' - 27);
else return(-1);
if (!od->rootfs)
break;
*p = 'b';
/* FALLTHROUGH */
case '-':
if ((c = *p) == 'a')
od->boothowto &= ~RB_SINGLE;
else if (c == 'b')
od->boothowto |= RB_ASKNAME;
else if (c == 'd')
od->boothowto |= RB_KDB;
else return(-1);
break;
case '.':
od->ostype = p;
break;
case '/':
od->osname = --p;
break;
default:
return(-1);
}
while ((c = *p) && !isspace(c))
p += 1;
}
done:
c = od->ostype[0];
if (isupper(c))
c = tolower(c);
switch (c) {
case 'n': /* NetBSD */
return(0);
case 'l': /* Linux */
return(0x10);
case 'a': /* ASV */
return(0x40);
case 't': /* TOS */
return(0x80);
default:
return(-1);
}
}
int
load_BSD(od)
osdsc *od;
{
struct exec hdr;
int err, fd;
u_int textsz, strsz;
/*
* Read kernel's exec-header.
*/
err = 1;
if ((fd = open(od->osname, 0)) < 0)
goto error;
err = 2;
if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr))
goto error;
err = 3;
if (N_GETMAGIC(hdr) != NMAGIC)
goto error;
/*
* Extract sizes from kernel executable.
*/
textsz = (hdr.a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1);
od->ksize = textsz + hdr.a_data + hdr.a_bss;
od->kentry = hdr.a_entry;
od->kstart = NULL;
od->k_esym = 0;
if (hdr.a_syms) {
u_int x = sizeof(hdr) + hdr.a_text + hdr.a_data + hdr.a_syms;
err = 8;
if (lseek(fd, (off_t)x, SEEK_SET) != x)
goto error;
err = 9;
if (read(fd, &strsz, sizeof(strsz)) != sizeof(strsz))
goto error;
err = 10;
if (lseek(fd, (off_t)sizeof(hdr), SEEK_SET) != sizeof(hdr))
goto error;
od->ksize += sizeof(strsz) + hdr.a_syms + strsz;
}
/*
* Read text & data, clear bss
*/
err = 16;
if ((od->kstart = alloc(od->ksize)) == NULL)
goto error;
err = 17;
if (read(fd, od->kstart, hdr.a_text) != hdr.a_text)
goto error;
err = 18;
if (read(fd, od->kstart + textsz, hdr.a_data) != hdr.a_data)
goto error;
bzero(od->kstart + textsz + hdr.a_data, hdr.a_bss);
/*
* Read symbol and string table
*/
if (hdr.a_syms) {
char *p = od->kstart + textsz + hdr.a_data + hdr.a_bss;
*((u_int32_t *)p)++ = hdr.a_syms;
err = 24;
if (read(fd, p, hdr.a_syms) != hdr.a_syms)
goto error;
p += hdr.a_syms;
err = 25;
if (read(fd, p, strsz) != strsz)
goto error;
od->k_esym = (p - (char *)od->kstart) + strsz;
}
return(0);
error:
if (fd >= 0) {
if (od->kstart)
free(od->kstart, od->ksize);
close(fd);
}
printf("Error %d in load_BSD.\n", err);
return(-1);
}