File: [local] / sys / arch / i386 / stand / libsa / biosprobe.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:06:03 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: biosprobe.c,v 1.4 2004/03/09 19:12:12 tom Exp $ */
/*
* Copyright (c) 2002 Tobias Weingartner
* 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.
*
* 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.
*/
#include <sys/param.h>
#include <machine/biosvar.h>
#include <machine/pio.h>
#include <dev/cons.h>
#include <sys/disklabel.h>
#include "disk.h"
#include "debug.h"
#include "libsa.h"
#include "biosdev.h"
void *
getSYSCONFaddr(void)
{
u_int32_t status;
u_int8_t *vers;
__asm __volatile(DOINT(0x15) "\n\t"
"setc %%al\n\t"
: "=a" (status)
: "0" (0xC000)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "cc");
/* On failure we go for a NULL */
if (status)
return NULL;
/* Calculate where the version bytes are */
vers = (void*)((BIOS_regs.biosr_es << 4) | BIOS_regs.biosr_bx);
return vers;
}
void *
getEBDAaddr(void)
{
u_int32_t status;
u_int8_t *info;
info = getSYSCONFaddr();
if (!info)
return NULL;
__asm __volatile(DOINT(0x15) "\n\t"
"setc %%al"
: "=a" (status)
: "0" (0xC100)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "cc");
if (status)
return NULL;
info = (void *)(BIOS_regs.biosr_es << 4);
return info;
}