File: [local] / sys / arch / vax / boot / common / str.S (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:35 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: str.S,v 1.1 2002/06/11 09:36:24 hugh Exp $ */
/* $NetBSD: str.S,v 1.1 2002/02/24 01:04:25 matt Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* 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 at Ludd, University of
* Lule}, Sweden and its contributors.
* 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.
*/
/*
* Small versions of the most common functions not using any
* emulated instructions.
*/
#include "asm.h"
/*
* atoi() used in devopen.
*/
ENTRY(atoi, 0)
movl 4(ap),r1
clrl r0
2: movzbl (r1)+,r2
cmpb r2,$48
blss 1f
cmpb r2,$57
bgtr 1f
subl2 $48,r2
mull2 $10,r0
addl2 r2,r0
brb 2b
1: ret
/*
* index() small and easy.
* doesnt work if we search for null.
*/
ENTRY(index, 0)
movq 4(ap),r0
1: cmpb (r0), r1
beql 2f
tstb (r0)+
bneq 1b
clrl r0
2: ret
/*
* cmpc3 is emulated on MVII.
*/
ENTRY(bcmp, 0)
movl 4(ap), r2
movl 8(ap), r1
movl 12(ap), r0
2: cmpb (r2)+, (r1)+
bneq 1f
decl r0
bneq 2b
1: ret
/*
* Is movc3/movc5 emulated on any CPU? I dont think so; use them here.
*/
ENTRY(bzero,0)
movc5 $0,*4(ap),$0,8(ap),*4(ap)
ret
ENTRY(bcopy,0)
movc3 12(ap), *4(ap), *8(ap)
ret
ENTRY(strlen, 0)
movl 4(ap), r0
1: tstb (r0)+
bneq 1b
decl r0
subl2 4(ap), r0
ret
ENTRY(strncmp, 0)
movl 12(ap), r3
brb 5f
ENTRY(strcmp, 0)
movl $250, r3 # max string len to compare
5: movl 4(ap), r2
movl 8(ap), r1
movl $1, r0
2: cmpb (r2),(r1)+
bneq 1f # something differ
tstb (r2)+
beql 4f # continue, strings unequal
decl r3 # max string len encountered?
bneq 2b
4: clrl r0 # We are done, strings equal.
ret
1: bgtr 3f
mnegl r0, r0
3: ret
ENTRY(strncpy, 0)
movl 4(ap), r1
movl 8(ap), r2
movl 12(ap), r3
bleq 2f
1: movb (r2)+, (r1)+
beql 2f
decl r3
bneq 1b
2: ret
ENTRY(strcat, 0)
pushl 4(ap)
calls $1,_C_LABEL(strlen)
addl2 4(ap),r0
movl 8(ap),r1
1: movb (r1)+,(r0)+
bneq 1b
ret
ENTRY(setjmp, 0)
movl 4(ap), r0
movl 8(fp), (r0)
movl 12(fp), 4(r0)
movl 16(fp), 8(r0)
addl3 fp,$28,12(r0)
clrl r0
ret
ENTRY(longjmp, 0)
movl 4(ap), r1
movl 8(ap), r0
movl (r1), ap
movl 4(r1), fp
movl 12(r1), sp
jmp *8(r1)