File: [local] / sys / arch / alpha / stand / bootxx.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:04:49 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
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/* $OpenBSD: bootxx.c,v 1.10 2004/07/05 19:59:17 deraadt Exp $ */
/* $NetBSD: bootxx.c,v 1.4 1997/01/18 00:28:59 cgd Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <machine/rpb.h>
#include <machine/prom.h>
#include "bbinfo.h"
extern _end, start;
struct bbinfoloc desc = {
0xbabefacedeadbeef,
(u_int64_t)&start,
(u_int64_t)&_end,
{ 0, },
0xdeadbeeffacebabe
};
int
open_dev(fd)
int *fd;
{
prom_return_t ret;
char devname[64];
int devlen;
/*
* XXX
* We don't know what device names look like yet,
* so we can't change them.
*/
ret.bits = prom_getenv(PROM_E_BOOTED_DEV, devname, sizeof(devname));
devlen = ret.u.retval;
ret.bits = prom_open(devname, devlen);
if (ret.u.status)
return 0;
*fd = ret.u.retval;
return 1;
}
int
load_file(bbinfop, loadaddr)
struct bbinfo *bbinfop;
char *loadaddr;
{
prom_return_t ret;
int32_t cksum, *int32p;
int i, n, fd, rv;
char *cp;
if (bbinfop->nblocks <= 0) {
puts("invalid number of blocks in boot program description\n");
return 0;
}
if (bbinfop->bsize < DEV_BSIZE || bbinfop->bsize > MAXBSIZE) {
puts("invalid block size in boot program description\n");
return 0;
}
int32p = (int32_t *)&_end;
n = bbinfop->nblocks +
(sizeof(*bbinfop) / sizeof(bbinfop->blocks[0])) - 1;
if ((long)&_end - (long)&start + sizeof(bbinfop->blocks[0]) * n >
15 * 512) {
puts("way too many blocks\n");
return 0;
}
for (i = 0, cksum = 0; i < n; i++)
cksum += *int32p++;
if (cksum != 0) {
puts("invalid checksum in boot program description\n");
return 0;
}
if (!open_dev(&fd)) {
puts("couldn't open disk device\n");
return 0;
}
cp = loadaddr;
rv = 1;
for (i = 0; i < bbinfop->nblocks; i++) {
puts(".");
ret.bits = prom_read(fd, bbinfop->bsize, cp,
bbinfop->blocks[i]);
puts("\b");
if (ret.u.status) {
rv = 0;
puts("BLOCK READ ERROR!\n");
break;
}
cp += bbinfop->bsize;
}
prom_close(fd);
return (rv);
}
int
main()
{
struct bbinfo *bbinfop;
char *loadaddr;
void (*entry)(void);
/* Init prom callback vector. */
init_prom_calls();
puts("\nOpenBSD/Alpha Primary Boot\n");
bbinfop = (struct bbinfo *)&_end;
loadaddr = (char *)SECONDARY_LOAD_ADDRESS;
if (!load_file(bbinfop, loadaddr)) {
puts("\nLOAD FAILED!\n\n");
return;
}
#if 0
puts("Jumping to entry point...\n");
#endif
entry = (void (*)())loadaddr;
(*entry)();
puts("SECONDARY BOOT BLOCK RETURNED!\n");
}