File: [local] / sys / arch / i386 / stand / boot / crt0.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:06:03 2008 UTC (16 years, 3 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: crt0.c,v 1.5 2003/06/03 20:22:11 mickey Exp $ */
/*
* Copyright (c) 1997-1998 Michael Shalayeff
* 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 REGENTS OR CONTRIBUTORS 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 <sys/types.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <termios.h>
#include "libsa.h"
#include <lib/libsa/unixdev.h>
void start(void) asm("start");
void _rtt(void);
extern int boot(dev_t);
static void domap(void);
static void seterm(void);
void
start()
{
domap();
seterm();
uexit(boot(0));
}
void
_rtt()
{
uexit(1);
}
#define ummap(a,l,p,f,fd,o) (caddr_t)syscall((quad_t)SYS_mmap,a,l,p,f,fd,0,o)
static void
domap()
{
extern char end[];
register caddr_t p = (caddr_t)(((u_long)end + PGOFSET) & ~PGOFSET);
/* map heap */
if ( (p = ummap(p, 32*NBPG, PROT_READ|PROT_WRITE,
MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
printf("mmap failed: %d\n", errno);
uexit(1);
}
#ifdef DEBUG
else
printf("mmap==%p\n", p);
#endif
/* map kernel */
if ( (p = ummap(0x100000, 0xf00000, PROT_READ|PROT_WRITE,
MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
printf("mmap failed: %d\n", errno);
uexit(1);
}
#ifdef DEBUG
else
printf("mmap==%p\n", p);
#endif
}
void
seterm()
{
struct termios tc;
if (uioctl(0, TIOCGETA, (char *)&tc) < 0) {
printf("cannot get tty\n");
uexit(1);
}
tc.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
tc.c_oflag &= ~OPOST;
tc.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
tc.c_cflag &= ~(CSIZE|PARENB);
tc.c_cflag |= CS8;
if (uioctl(0, TIOCSETA, (char *)&tc) < 0) {
printf("cannot set tty\n");
uexit(1);
}
}