File: [local] / sys / arch / mvme68k / stand / sboot / XBUG.S (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:07:37 2008 UTC (16 years, 6 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)
|
/* $OpenBSD: XBUG.S,v 1.7 2003/06/04 16:36:14 deraadt Exp $ */
/*
* Copyright (c) 1989,1990,1995 Theo de Raadt
*
* 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.
*
* 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.
*/
/*
* Theo says: I wrote a bootrom for the MVME147 *years* ago. To write
* this ROM I copied a few chunks from the old bootrom, like this piece:
*
* "watch this, the moto bastard struck here, shouldn't have hired people
* from intel I tried to tell them...
* "BOOT"
* offset from baseaddr to entry point.
* offset from baseaddr to first word after checksum
* garbage
* checksum made with CS command
* No need to change any of this unless you try to take our names out
* of there. Ie. don't touch."
*/
.text
bootlabel: .ascii "BOOT"
.long bootstart-0xffa00000 | for rom install
.long bootlabelend - bootlabel
.asciz "VME147 rboot Copyright (c) 1995 Theo de Raadt"
.align 2
bootstart: jmp bssclr
.word 0x229c | XXX bitching cksum!
bootlabelend:
.word 0
| clear bss and the kernel location
bssclr: movl #_edata,a0
movl #_end,d0
subl #_edata,d0
1: clrb a0@+
subql #1,d0
bpl 1b
| rip the data segment from ROM into ram..
movl #_etext,a2 | start of data
movl #0x4000,a1 | shovel address
movl #_edata,d0
subl #_etext,d0
1: movb a2@+,a1@+
subql #1,d0
bpl 1b
bra start