File: [local] / sys / arch / vax / vax / scb.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:47 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: scb.c,v 1.5 2004/07/07 23:10:46 deraadt Exp $ */
/* $NetBSD: scb.c,v 1.12 2000/06/04 06:16:59 matt Exp $ */
/*
* Copyright (c) 1999 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.
*/
/*
* Routines for dynamic allocation/release of SCB vectors.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/trap.h>
#include <machine/scb.h>
#include <machine/frame.h>
#include <machine/cpu.h>
#include <machine/sid.h>
#include <machine/mtpr.h>
struct scb *scb;
struct ivec_dsp *scb_vec;
static void scb_stray(void *);
static volatile int vector, ipl, gotintr;
/*
* Generates a new SCB.
*/
paddr_t
scb_init(paddr_t avail_start)
{
struct ivec_dsp **ivec = (struct ivec_dsp **)avail_start;
struct ivec_dsp **old = (struct ivec_dsp **)KERNBASE;
vaddr_t vavail = avail_start + KERNBASE;
int scb_size = dep_call->cpu_scbsz;
int i;
scb = (struct scb *)vavail;
scb_vec = (struct ivec_dsp *)(vavail + (scb_size * VAX_NBPG));
/* Init the whole SCB with interrupt catchers */
for (i = 0; i < (scb_size * VAX_NBPG)/4; i++) {
ivec[i] = &scb_vec[i];
(int)ivec[i] |= 1; /* On istack, please */
scb_vec[i] = idsptch;
scb_vec[i].hoppaddr = scb_stray;
scb_vec[i].pushlarg = (void *) (i * 4);
scb_vec[i].ev = NULL;
}
/*
* Copy all pre-set interrupt vectors to the new SCB.
* It is known that these vectors is at KERNBASE from the
* beginning, and that if the vector is zero it should call
* stray instead.
*/
for (i = 0; i < 64; i++)
if (old[i])
ivec[i] = old[i];
/* Last action: set the SCB */
mtpr(avail_start, PR_SCBB);
/* Return new avail_start. Also save space for the dispatchers. */
return avail_start + (1 + sizeof(struct ivec_dsp) / sizeof(void *))
* scb_size * VAX_NBPG;
};
/*
* Stray interrupt handler.
* This function must _not_ save any registers (in the reg save mask).
*/
void
scb_stray(void *arg)
{
gotintr = 1;
vector = ((int) arg) & ~3;
ipl = mfpr(PR_IPL);
if (cold == 0)
printf("stray interrupt: vector %d, ipl %d\n", vector, ipl);
else {
struct icallsframe *icf = (void *) __builtin_frame_address(0);
icf->ica_psl = (icf->ica_psl & ~PSL_IPL) | ipl << 16;
}
mtpr(ipl + 1, PR_IPL);
}
/*
* Fake interrupt handler, to fool some bus' autodetect system.
* (May I say DW780? :-)
*/
void
scb_fake(vec, br)
int vec, br;
{
vector = vec;
ipl = br;
gotintr = 1;
}
/*
* Returns last vector/ipl referenced. Clears vector/ipl after reading.
*/
int
scb_vecref(rvec, ripl)
int *rvec, *ripl;
{
int save;
if (rvec)
*rvec = vector;
if (ripl)
*ripl = ipl;
save = gotintr;
gotintr = vector = ipl = 0;
mtpr(0, PR_IPL);
return save;
}
/*
* Sets a vector to the specified function.
* Arg may not be greater than 63.
*/
void
scb_vecalloc(vecno, func, arg, stack, ev)
int vecno;
void (*func)(void *);
void *arg;
int stack;
struct evcount *ev;
{
struct ivec_dsp *dsp = &scb_vec[vecno / 4];
dsp->hoppaddr = func;
dsp->pushlarg = arg;
dsp->ev = ev;
((u_int *) scb)[vecno/4] = (u_int)(dsp) | stack;
}