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Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:54 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)

/*	$OpenBSD: crt.c,v 1.2 2006/05/20 22:38:33 miod Exp $ */

#include <sys/types.h>
#include <machine/prom.h>

#include "stand.h"

extern void netboot(const char *, int, int, int);

/*
 * This is the boot code entry point.
 * Note that we do not bother to set r31, and use the default value supplied
 * by the PROM, which is the top of memory, minus the PROM data area (usually
 * 128KB).
 */
void
start(const char *args, int dev, int unit, int part)
{
	extern int edata, end;

	/* 
	 * This code enables the SFU1 and is used for single stage 
	 * bootstraps or the first stage of a two stage bootstrap.
	 * Do not use any low register to enable the SFU1. This wipes out
	 * the args.  Not cool at all... r25 seems free. 
	 */
	asm("|	enable SFU1");
	asm("	ldcr	r25,cr1" ::: "r25");
	asm("	clr	r25,r25,1<3>"); /* bit 3 is SFU1D */
	asm("	stcr	r25,cr1");

	memset(&edata, 0, ((int)&end - (int)&edata));

	netboot(args, dev, unit, part);
	_rtt();
	/* NOTREACHED */
}

void
__main()
{
}