NetBSD/sys/arch/vax/vsa/vsbus.c

334 lines
7.9 KiB
C

/* $NetBSD: vsbus.c,v 1.24 2000/04/23 16:38:54 matt Exp $ */
/*
* Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* This code is derived from software contributed to Ludd by Bertram Barth.
*
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/map.h>
#include <sys/device.h>
#include <sys/dkstat.h>
#include <sys/disklabel.h>
#include <sys/syslog.h>
#include <sys/stat.h>
#include <vm/vm.h>
#define _VAX_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/pte.h>
#include <machine/sid.h>
#include <machine/scb.h>
#include <machine/cpu.h>
#include <machine/trap.h>
#include <machine/nexus.h>
#include <machine/uvax.h>
#include <machine/ka410.h>
#include <machine/ka420.h>
#include <machine/ka43.h>
#include <machine/vsbus.h>
#include "ioconf.h"
#include "opt_vax46.h"
#include "opt_vax48.h"
#include "opt_vax49.h"
int vsbus_match __P((struct device *, struct cfdata *, void *));
void vsbus_attach __P((struct device *, struct device *, void *));
int vsbus_print __P((void *, const char *));
int vsbus_search __P((struct device *, struct cfdata *, void *));
static struct vax_bus_dma_tag vsbus_bus_dma_tag = {
0,
0,
0,
0,
0,
0,
_bus_dmamap_create,
_bus_dmamap_destroy,
_bus_dmamap_load,
_bus_dmamap_load_mbuf,
_bus_dmamap_load_uio,
_bus_dmamap_load_raw,
_bus_dmamap_unload,
_bus_dmamap_sync,
_bus_dmamem_alloc,
_bus_dmamem_free,
_bus_dmamem_map,
_bus_dmamem_unmap,
_bus_dmamem_mmap,
};
extern struct vax_bus_space vax_mem_bus_space;
struct cfattach vsbus_ca = {
sizeof(struct vsbus_softc), vsbus_match, vsbus_attach
};
int
vsbus_print(aux, name)
void *aux;
const char *name;
{
struct vsbus_attach_args *va = aux;
printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr,
va->va_cvec & 511, va->va_br, va->va_maskno - 1);
return(UNCONF);
}
int
vsbus_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
if (vax_bustype == VAX_VSBUS)
return 1;
return 0;
}
void
vsbus_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct vsbus_softc *sc = (void *)self;
printf("\n");
sc->sc_dmatag = vsbus_bus_dma_tag;
switch (vax_boardtype) {
#if VAX49
case VAX_BTYP_49:
sc->sc_vsregs = vax_map_physmem(0x25c00000, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 12;
sc->sc_intclr = (char *)sc->sc_vsregs + 12;
sc->sc_intmsk = (char *)sc->sc_vsregs + 8;
vsbus_dma_init(sc, 8192);
break;
#endif
#if VAX46 || VAX48
case VAX_BTYP_48:
case VAX_BTYP_46:
sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 15;
sc->sc_intclr = (char *)sc->sc_vsregs + 15;
sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
vsbus_dma_init(sc, 32768);
#endif
default:
sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 15;
sc->sc_intclr = (char *)sc->sc_vsregs + 15;
sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
break;
}
/*
* First: find which interrupts we won't care about.
* There are interrupts that interrupt on a periodic basic
* that we don't want to interfere with the rest of the
* interrupt probing.
*/
*sc->sc_intmsk = 0;
*sc->sc_intclr = 0xff;
DELAY(1000000); /* Wait a second */
sc->sc_mask = *sc->sc_intreq;
printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask);
/*
* now check for all possible devices on this "bus"
*/
config_search(vsbus_search, self, NULL);
/* Autoconfig finished, enable interrupts */
*sc->sc_intmsk = ~sc->sc_mask;
}
int
vsbus_search(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct vsbus_softc *sc = (void *)parent;
struct vsbus_attach_args va;
int i, vec, br;
u_char c;
va.va_paddr = cf->cf_loc[0];
va.va_addr = vax_map_physmem(va.va_paddr, 1);
va.va_dmat = &sc->sc_dmatag;
va.va_iot = &vax_mem_bus_space;
*sc->sc_intmsk = 0;
*sc->sc_intclr = 0xff;
scb_vecref(0, 0); /* Clear vector ref */
i = (*cf->cf_attach->ca_match) (parent, cf, &va);
vax_unmap_physmem(va.va_addr, 1);
c = *sc->sc_intreq & ~sc->sc_mask;
if (i == 0)
goto forgetit;
if (i > 10)
c = sc->sc_mask; /* Fooling interrupt */
else if (c == 0)
goto forgetit;
*sc->sc_intmsk = c;
DELAY(100);
*sc->sc_intmsk = 0;
va.va_maskno = ffs((u_int)c);
i = scb_vecref(&vec, &br);
if (i == 0)
goto fail;
if (vec == 0)
goto fail;
va.va_br = br;
va.va_cvec = vec;
config_attach(parent, cf, &va, vsbus_print);
return 0;
fail:
printf("%s%d at %s csr %x %s\n",
cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
forgetit:
return 0;
}
/*
* Sets a new interrupt mask. Returns the old one.
* Works like spl functions.
*/
unsigned char
vsbus_setmask(mask)
unsigned char mask;
{
struct vsbus_softc *sc = vsbus_cd.cd_devs[0];
unsigned char ch;
ch = *sc->sc_intmsk;
*sc->sc_intmsk = mask;
return ch;
}
/*
* Clears the interrupts in mask.
*/
void
vsbus_clrintr(mask)
unsigned char mask;
{
struct vsbus_softc *sc = vsbus_cd.cd_devs[0];
*sc->sc_intclr = mask;
}
/*
* Copy data from/to a user process' space from the DMA area.
* Use the physical memory directly.
*/
void
vsbus_copytoproc(p, from, to, len)
struct proc *p;
caddr_t from, to;
int len;
{
struct pte *pte;
paddr_t pa;
pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb));
if ((vaddr_t)to & PGOFSET) {
int cz = ROUND_PAGE(to) - (vaddr_t)to;
pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE;
bcopy(from, (caddr_t)pa, min(cz, len));
from += cz;
to += cz;
len -= cz;
pte += 8; /* XXX */
}
while (len > 0) {
pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
bcopy(from, (caddr_t)pa, min(NBPG, len));
from += NBPG;
to += NBPG;
len -= NBPG;
pte += 8; /* XXX */
}
}
void
vsbus_copyfromproc(p, from, to, len)
struct proc *p;
caddr_t from, to;
int len;
{
struct pte *pte;
paddr_t pa;
pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb));
if ((vaddr_t)from & PGOFSET) {
int cz = ROUND_PAGE(from) - (vaddr_t)from;
pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE;
bcopy((caddr_t)pa, to, min(cz, len));
from += cz;
to += cz;
len -= cz;
pte += 8; /* XXX */
}
while (len > 0) {
pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
bcopy((caddr_t)pa, to, min(NBPG, len));
from += NBPG;
to += NBPG;
len -= NBPG;
pte += 8; /* XXX */
}
}