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671919edee
NetBSD/sys/arch/i386/pnpbios/pnpbios.c
drochner 671919edee add consistency check whether the end mark does appear before the 
reported number of nodes
1999-11-30 15:54:55 +00:00

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/* $NetBSD: pnpbios.c,v 1.6 1999/11/30 15:54:55 drochner Exp $ */
/*
* Copyright (c) 1999
* Matthias Drochner. 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 AND CONTRIBUTORS ``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 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/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <dev/isa/isareg.h>
#include <machine/isa_machdep.h>
#include <machine/segments.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <arch/i386/pnpbios/pnpbiosvar.h>
#include "opt_pnpbiosverbose.h"
#include "isadma.h"
#include "locators.h"
struct pnpbios_softc {
struct device sc_dev;
isa_chipset_tag_t sc_ic;
};
static caddr_t pnpbios_find __P((void));
static int pnpbios_match __P((struct device *, struct cfdata *, void *));
static void pnpbios_attach __P((struct device *, struct device *, void *));
static void pnpbios_printres __P((struct pnpresources *));
static int pnpbios_print __P((void *, const char *));
static int pnpbios_getnumnodes __P((int *, size_t *));
static int pnpbios_getnode __P((int, int *, unsigned char *, size_t));
static void eisaid_to_string __P((unsigned char *, char *));
static void pnpbios_attachnode __P((struct pnpbios_softc *, int,
unsigned char *, size_t));
static int pnp_scan __P((unsigned char **, size_t, struct pnpresources *, int));
static int pnpbios_submatch __P((struct device *, struct cfdata *, void *));
extern int pnpbioscall __P((int));
struct cfattach pnpbios_ca = {
sizeof(struct pnpbios_softc), pnpbios_match, pnpbios_attach
};
/*
* Private stack and return value buffer. Spec (1.0a, ch. 4.3) says that
* 1024 bytes must be available to the BIOS function.
*/
#define PNPBIOS_BUFSIZE 4096
int pnpbios_enabled = 1;
size_t pnpbios_entry;
caddr_t pnpbios_scratchbuf;
/*
* There can be only one of these, and the i386 ISA code needs to
* reference this.
*/
struct pnpbios_softc *pnpbios_softc;
#define PNPBIOS_SIGNATURE ('$' | ('P' << 8) | ('n' << 16) | ('P' << 24))
static caddr_t
pnpbios_find()
{
caddr_t p, c;
unsigned char cksum;
size_t structlen;
for (p = (caddr_t)ISA_HOLE_VADDR(0xf0000);
p <= (caddr_t)ISA_HOLE_VADDR(0xffff0);
p += 16) {
if (*(int *)p != PNPBIOS_SIGNATURE)
continue;
structlen = *(unsigned char *)(p + 5);
if ((structlen < 0x21) ||
((p + structlen - 1) > (caddr_t)ISA_HOLE_VADDR(0xfffff)))
continue;
cksum = 0;
for (c = p; c < p + structlen; c++)
cksum += *(unsigned char *)c;
if (cksum != 0)
continue;
if (*(char *)(p + 4) != 0x10) {
printf("unknown version %x\n", *(char *)(p + 4));
continue;
}
return (p);
}
return (0);
}
int
pnpbios_probe()
{
return (pnpbios_find() != 0);
}
static int
pnpbios_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pnpbios_attach_args *paa = aux;
/* These are not the droids you're looking for. */
if (strcmp(paa->paa_busname, "pnpbios") != 0)
return (0);
/* There can be only one! */
if (pnpbios_softc != NULL)
return (0);
return (pnpbios_enabled);
}
static caddr_t mapit __P((u_long, u_long, int));
static caddr_t
mapit(addr, len, prot)
u_long addr, len;
int prot;
{
u_long startpa, pa, endpa;
vaddr_t startva, va;
pa = startpa = i386_trunc_page(addr);
endpa = i386_round_page(addr + len);
va = startva = uvm_km_valloc(kernel_map, endpa - startpa);
if (!startva)
return (0);
for (; pa < endpa; pa += NBPG, va += NBPG)
pmap_kenter_pa(va, pa, prot);
return ((caddr_t)(startva + (addr - startpa)));
}
static void
pnpbios_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pnpbios_softc *sc = (struct pnpbios_softc *)self;
struct pnpbios_attach_args *paa = aux;
caddr_t p;
unsigned int codepbase, datapbase;
caddr_t codeva, datava;
extern char pnpbiostramp[], epnpbiostramp[];
int res, num, i, size, idx;
unsigned char *buf;
pnpbios_softc = sc;
sc->sc_ic = paa->paa_ic;
#if NISADMA > 0
isa_dmainit(sc->sc_ic, I386_BUS_SPACE_IO, &isa_bus_dma_tag, self);
#endif
p = pnpbios_find();
if (!p)
panic("pnpbios_attach: disappeared");
codepbase = *(unsigned int *)(p + 0x13);
datapbase = *(unsigned int *)(p + 0x1d);
pnpbios_entry = *(unsigned short *)(p + 0x11);
#ifdef PNPBIOSVERBOSE
printf(": code %x, data %x, entry %x\n%s",
codepbase, datapbase, pnpbios_entry, self->dv_xname);
#endif
codeva = mapit(codepbase, 0x10000,
VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
datava = mapit(datapbase, 0x10000,
VM_PROT_READ | VM_PROT_WRITE);
if (codeva == 0 || datava == 0) {
printf("no vm for mapping\n");
return;
}
pnpbios_scratchbuf = malloc(PNPBIOS_BUFSIZE, M_DEVBUF, M_NOWAIT);
setsegment(&gdt[GPNPBIOSCODE_SEL].sd, codeva, 0xffff,
SDT_MEMERA, SEL_KPL, 0, 0);
setsegment(&gdt[GPNPBIOSDATA_SEL].sd, datava, 0xffff,
SDT_MEMRWA, SEL_KPL, 0, 0);
setsegment(&gdt[GPNPBIOSSCRATCH_SEL].sd,
pnpbios_scratchbuf, PNPBIOS_BUFSIZE - 1,
SDT_MEMRWA, SEL_KPL, 0, 0);
setsegment(&gdt[GPNPBIOSTRAMP_SEL].sd,
pnpbiostramp, epnpbiostramp - pnpbiostramp - 1,
SDT_MEMERA, SEL_KPL, 1, 0);
res = pnpbios_getnumnodes(&num, &size);
if (res) {
printf("pnpbios_getnumnodes: error %d\n", res);
return;
}
printf(": %d nodes, max len %d\n", num, size);
buf = malloc(size, M_DEVBUF, M_NOWAIT);
idx = 0;
for (i = 0; i < num && idx != 0xff; i++) {
int node = idx;
res = pnpbios_getnode(1, &idx, buf, size);
if (res) {
printf("pnpbios_getnode: error %d\n", res);
continue;
}
if (buf[2] != node)
printf("node idx: called %d, got %d\n", node, buf[2]);
pnpbios_attachnode(sc, node, buf, buf[0] + (buf[1] << 8));
}
if (i != num)
printf("got only %d nodes\n", i);
if (idx != 0xff)
printf("last idx=%x\n", idx);
free(buf, M_DEVBUF);
}
static int
pnpbios_getnumnodes(nump, sizep)
int *nump;
size_t *sizep;
{
int res;
short *help = (short *)(pnpbios_scratchbuf + PNPBIOS_BUFSIZE);
*--help = GSEL(GPNPBIOSDATA_SEL, SEL_KPL);
*--help = GSEL(GPNPBIOSSCRATCH_SEL, SEL_KPL);
*--help = 2; /* buffer offset for node size */
*--help = GSEL(GPNPBIOSSCRATCH_SEL, SEL_KPL);
*--help = 0; /* buffer offset for numnodes */
*--help = 0; /* GET_NUM_NODES */
res = pnpbioscall(((caddr_t)help) - pnpbios_scratchbuf);
if (res)
return (res);
*nump = *(short *)(pnpbios_scratchbuf + 0);
*sizep = *(short *)(pnpbios_scratchbuf + 2);
return (0);
}
static int
pnpbios_getnode(flags, idxp, buf, len)
int flags;
int *idxp;
unsigned char *buf;
size_t len;
{
int res;
short *help = (short *)(pnpbios_scratchbuf + PNPBIOS_BUFSIZE);
*--help = GSEL(GPNPBIOSDATA_SEL, SEL_KPL);
*--help = flags;
*--help = GSEL(GPNPBIOSSCRATCH_SEL, SEL_KPL);
*--help = 2; /* buffer offset for node data */
*--help = GSEL(GPNPBIOSSCRATCH_SEL, SEL_KPL);
*--help = 0; /* buffer offset for index in/out */
*--help = 1; /* GET_DEVICE_NODE */
*(short *)(pnpbios_scratchbuf + 0) = *idxp;
res = pnpbioscall(((caddr_t)help) - pnpbios_scratchbuf);
if (res)
return (res);
*idxp = *(short *)(pnpbios_scratchbuf + 0);
bcopy(pnpbios_scratchbuf + 2, buf, len);
return (0);
}
static void
eisaid_to_string(id, s)
unsigned char *id;
char *s;
{
static char hex[] = "0123456789ABCDEF";
*s++ = 'A' + (id[0] >> 2) - 1;
*s++ = 'A' + ((id[0] & 3) << 3) + (id[1] >> 5) - 1;
*s++ = 'A' + (id[1] & 0x1f) - 1;
*s++ = hex[id[2] >> 4];
*s++ = hex[id[2] & 0x0f];
*s++ = hex[id[3] >> 4];
*s++ = hex[id[3] & 0x0f];
*s = '\0';
}
static void
pnpbios_printres(r)
struct pnpresources *r;
{
struct pnp_mem *mem;
struct pnp_io *io;
struct pnp_irq *irq;
struct pnp_dma *dma;
int p = 0;
mem = SIMPLEQ_FIRST(&r->mem);
if (mem) {
printf("mem");
do {
printf(" %x", mem->minbase);
if (mem->len > 1)
printf("-%x", mem->minbase + mem->len - 1);
} while ((mem = SIMPLEQ_NEXT(mem, next)));
p++;
}
io = SIMPLEQ_FIRST(&r->io);
if (io) {
if (p++)
printf(", ");
printf("io");
do {
printf(" %x", io->minbase);
if (io->len > 1)
printf("-%x", io->minbase + io->len - 1);
} while ((io = SIMPLEQ_NEXT(io, next)));
}
irq = SIMPLEQ_FIRST(&r->irq);
if (irq) {
if (p++)
printf(", ");
printf("irq");
do {
printf(" %d", ffs(irq->mask) - 1);
} while ((irq = SIMPLEQ_NEXT(irq, next)));
}
dma = SIMPLEQ_FIRST(&r->dma);
if (dma) {
if (p)
printf(", ");
printf("dma");
do {
printf(" %d", ffs(dma->mask) - 1);
} while ((dma = SIMPLEQ_NEXT(dma, next)));
}
}
static int
pnpbios_print(aux, pnp)
void *aux;
const char *pnp;
{
struct pnpbiosdev_attach_args *aa = aux;
if (pnp)
return (QUIET);
printf(" index %d (%s", aa->idx, aa->primid);
if (aa->resc->longname)
printf(", %s", aa->resc->longname);
if (aa->idstr != aa->primid)
printf(", attached as %s", aa->idstr);
printf(")");
return (0);
}
void
pnpbios_print_devres(dev, aa)
struct device *dev;
struct pnpbiosdev_attach_args *aa;
{
printf("%s: ", dev->dv_xname);
pnpbios_printres(aa->resc);
printf("\n");
}
static int
pnpbios_submatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pnpbiosdev_attach_args *aa = aux;
if (match->cf_loc[PNPBIOSCF_INDEX] != PNPBIOSCF_INDEX_DEFAULT &&
match->cf_loc[PNPBIOSCF_INDEX] != aa->idx)
return (0);
return ((*match->cf_attach->ca_match)(parent, match, aux));
}
static void
pnpbios_attachnode(sc, idx, buf, len)
struct pnpbios_softc *sc;
int idx;
unsigned char *buf;
size_t len;
{
char idstr[8];
unsigned char *p;
int res;
struct pnpresources r, s;
int i;
struct pnpbiosdev_attach_args aa;
struct pnp_compatid *compatid;
eisaid_to_string(buf + 3, idstr);
p = buf + 12;
res = pnp_scan(&p, len - 12, &r, 0);
if (res < 0) {
printf("error in config data\n");
goto dump;
}
/*
* the following is consistency check only for now
*/
res = pnp_scan(&p, len - (p - buf), &s, 0);
if (res < 0) {
printf("error in possible configuration\n");
goto dump;
}
res = pnp_scan(&p, len - (p - buf), &s, 0);
if (res < 0) {
printf("error in compatible ID\n");
goto dump;
}
if (p != buf + len) {
printf("length mismatch\n");
goto dump;
}
aa.pbt = 0; /* XXX placeholder */
aa.idx = idx;
aa.resc = &r;
aa.ic = sc->sc_ic;
aa.primid = idstr;
/* first try the specific device ID */
aa.idstr = idstr;
if (config_found_sm((struct device *)sc, &aa, pnpbios_print,
pnpbios_submatch))
return;
/* if no driver was found, try compatible IDs */
compatid = s.compatids;
while (compatid) {
aa.idstr = compatid->idstr;
if (config_found_sm((struct device *)sc, &aa, pnpbios_print,
pnpbios_submatch))
return;
compatid = compatid->next;
}
#ifdef PNPBIOSVERBOSE
printf("%s", idstr);
if (r.longname)
printf(", %s", r.longname);
compatid = s.compatids;
while (compatid) {
printf(", %s", compatid->idstr);
compatid = compatid->next;
}
printf(" (");
pnpbios_printres(&r);
printf(") at %s index %d ignored\n", sc->sc_dev.dv_xname, idx);
#endif
return;
/* XXX should free ressource lists */
dump:
for (i = 0; i < len; i++)
printf(" %02x", buf[i]);
printf("\n");
}
static int pnp_compatid __P((struct pnpresources *, unsigned char *, size_t));
static int pnp_newirq __P((struct pnpresources *, unsigned char *, size_t));
static int pnp_newdma __P((struct pnpresources *, unsigned char *, size_t));
static int pnp_newioport __P((struct pnpresources *, unsigned char *, size_t));
/*
* small ressource types (beginning with 1)
*/
static struct{
int (*handler) __P((struct pnpresources *, unsigned char *, size_t));
int minlen, maxlen;
} smallrescs[] = {
{0, 2, 2}, /* PnP version number */
{0, 5, 6}, /* logical device id */
{pnp_compatid, 4, 4}, /* compatible device id */
{pnp_newirq, 2, 3}, /* irq descriptor */
{pnp_newdma, 2, 2}, /* dma descriptor */
{0, 0, 1}, /* start dep */
{0, 0, 0}, /* end dep */
{pnp_newioport, 7, 7}, /* io descriptor */
{0, 3, 3}, /* fixed io descriptor */
{0, -1, -1}, /* reserved */
{0, -1, -1},
{0, -1, -1},
{0, -1, -1},
{0, 1, 7}, /* vendor defined */
{0, 1, 1} /* end */
};
#define NEXTBYTE(p) (*(p)++)
static int
pnp_scan(bufp, maxlen, r, in_depends)
unsigned char **bufp;
size_t maxlen;
struct pnpresources *r;
int in_depends;
{
unsigned char *p = *bufp;
int tag, type, len;
char *idstr;
int i;
struct pnp_mem *mem;
bzero(r, sizeof(*r));
SIMPLEQ_INIT(&r->mem);
SIMPLEQ_INIT(&r->io);
SIMPLEQ_INIT(&r->irq);
SIMPLEQ_INIT(&r->dma);
for (;;) {
if (p >= *bufp + maxlen) {
printf("pnp_scanresources: end of buffer\n");
return (-1);
}
tag = NEXTBYTE(p);
if (tag & 0x80) { /* long tag */
type = tag & 0x7f;
len = NEXTBYTE(p);
len |= NEXTBYTE(p) << 8;
switch (type) {
case 0x01: /* memory descriptor */
if (len != 9) {
printf("pnp_scan: bad mem desc\n");
return (-1);
}
mem = malloc(sizeof(struct pnp_mem),
M_DEVBUF, M_WAITOK);
mem->flags = NEXTBYTE(p);
mem->minbase = NEXTBYTE(p) << 8;
mem->minbase |= NEXTBYTE(p) << 16;
mem->maxbase = NEXTBYTE(p) << 8;
mem->maxbase |= NEXTBYTE(p) << 16;
mem->align = NEXTBYTE(p);
mem->align |= NEXTBYTE(p) << 8;
if (mem->align == 0)
mem->align = 0x10000;
mem->len = NEXTBYTE(p) << 8;
mem->len |= NEXTBYTE(p) << 16;
SIMPLEQ_INSERT_TAIL(&r->mem, mem, next);
r->nummem++;
#ifdef PNPBIOSDEBUG
if (mem->len == 0)
printf("ZERO mem descriptor\n");
#endif
break;
case 0x02:
if (in_depends)
printf("ID in dep?\n");
idstr = malloc(len + 1, M_DEVBUF, M_NOWAIT);
for (i = 0; i < len; i++)
idstr[i] = NEXTBYTE(p);
idstr[len] = '\0';
r->longname = idstr;
break;
case 0x06: /* 32bit fixed memory descriptor */
if (len != 9) {
printf("pnp_scan: bad mem32 desc\n");
return (-1);
}
mem = malloc(sizeof(struct pnp_mem),
M_DEVBUF, M_WAITOK);
mem->flags = NEXTBYTE(p);
mem->minbase = NEXTBYTE(p);
mem->minbase |= NEXTBYTE(p) << 8;
mem->minbase |= NEXTBYTE(p) << 16;
mem->minbase |= NEXTBYTE(p) << 24;
mem->maxbase = mem->minbase;
mem->align = 0;
mem->len = NEXTBYTE(p);
mem->len |= NEXTBYTE(p) << 8;
mem->len |= NEXTBYTE(p) << 16;
mem->len |= NEXTBYTE(p) << 24;
SIMPLEQ_INSERT_TAIL(&r->mem, mem, next);
r->nummem++;
#ifdef PNPBIOSDEBUG
if (mem->len == 0)
printf("ZERO mem descriptor\n");
#endif
break;
default:
printf("ignoring long tag %x\n", type);
while (len--)
(void) NEXTBYTE(p);
}
} else {
unsigned char tmpbuf[7];
int i;
type = (tag >> 3) & 0x0f;
len = tag & 0x07;
if (type == 0 ||
len < smallrescs[type - 1].minlen ||
len > smallrescs[type - 1].maxlen) {
printf("pnp_scan: bad small resource\n");
return (-1);
}
for (i = 0; i < len; i++)
tmpbuf[i] = NEXTBYTE(p);
if (type == 0x0f) { /* end mark */
if (in_depends) {
printf("end in dep?\n");
return (-1);
}
break;
}
if (type == 0x06) { /* start dep */
struct pnpresources *new, *last;
int res;
if (r->dependant_link) {
printf("second dep?\n");
return (-1);
}
if (in_depends) {
*bufp = p;
return (1);
}
last = r;
do {
new = malloc(sizeof(*new),
M_DEVBUF, M_NOWAIT);
res = pnp_scan(&p, maxlen - (p - *bufp),
new, 1);
if (res < 0) {
printf("error in dependant function\n");
free(new, M_DEVBUF);
return (-1);
}
last->dependant_link = new;
last = new;
} while (res > 0);
continue;
}
if (type == 0x07) { /* end dep */
if (!in_depends) {
printf("end dep?\n");
return (-1);
}
break;
}
if (!smallrescs[type - 1].handler)
printf("ignoring short tag %x\n", type);
else
if ((*smallrescs[type - 1].handler)(r, tmpbuf,
len))
return (-1);
}
}
*bufp = p;
return (0);
}
static int
pnp_newirq(r, buf, len)
struct pnpresources *r;
unsigned char *buf;
size_t len;
{
struct pnp_irq *irq;
irq = malloc(sizeof(struct pnp_irq), M_DEVBUF, M_NOWAIT);
irq->mask = buf[0] | (buf[1] << 8);
if (len > 2)
irq->flags = buf[2];
else
irq->flags = 0x01;
SIMPLEQ_INSERT_TAIL(&r->irq, irq, next);
r->numirq++;
return (0);
}
static int
pnp_newdma(r, buf, len)
struct pnpresources *r;
unsigned char *buf;
size_t len;
{
struct pnp_dma *dma;
dma = malloc(sizeof(struct pnp_dma), M_DEVBUF, M_NOWAIT);
dma->mask = buf[0];
dma->flags = buf[1];
SIMPLEQ_INSERT_TAIL(&r->dma, dma, next);
r->numdma++;
return (0);
}
static int
pnp_newioport(r, buf, len)
struct pnpresources *r;
unsigned char *buf;
size_t len;
{
struct pnp_io *io;
io = malloc(sizeof(struct pnp_io), M_DEVBUF, M_NOWAIT);
io->flags = buf[0];
io->minbase = buf[1] | (buf[2] << 8);
io->maxbase = buf[3] | (buf[4] << 8);
io->align = buf[5];
io->len = buf[6];
SIMPLEQ_INSERT_TAIL(&r->io, io, next);
r->numio++;
return (0);
}
static int
pnp_compatid(r, buf, len)
struct pnpresources *r;
unsigned char *buf;
size_t len;
{
struct pnp_compatid *id;
id = malloc(sizeof(*id), M_DEVBUF, M_NOWAIT);
eisaid_to_string(buf, id->idstr);
id->next = r->compatids;
r->compatids = id;
return (0);
}
int
pnpbios_io_map(pbt, resc, idx, tagp, hdlp)
pnpbios_tag_t pbt;
struct pnpresources *resc;
int idx;
bus_space_tag_t *tagp;
bus_space_handle_t *hdlp;
{
struct pnp_io *io;
if (idx >= resc->numio)
return (EINVAL);
io = SIMPLEQ_FIRST(&resc->io);
while (idx--)
io = SIMPLEQ_NEXT(io, next);
*tagp = I386_BUS_SPACE_IO;
return (i386_memio_map(I386_BUS_SPACE_IO, io->minbase, io->len,
0, hdlp));
}
int
pnpbios_getiobase(pbt, resc, idx, tagp, basep)
pnpbios_tag_t pbt;
struct pnpresources *resc;
int idx;
bus_space_tag_t *tagp;
int *basep;
{
struct pnp_io *io;
if (idx >= resc->numio)
return (EINVAL);
io = SIMPLEQ_FIRST(&resc->io);
while (idx--)
io = SIMPLEQ_NEXT(io, next);
if (tagp)
*tagp = I386_BUS_SPACE_IO;
if (basep)
*basep = io->minbase;
return (0);
}
void *
pnpbios_intr_establish(pbt, resc, idx, level, fcn, arg)
pnpbios_tag_t pbt;
struct pnpresources *resc;
int idx, level;
int (*fcn) __P((void *));
void *arg;
{
struct pnp_irq *irq;
int irqnum, type;
if (idx >= resc->numirq)
return (0);
irq = SIMPLEQ_FIRST(&resc->irq);
while (idx--)
irq = SIMPLEQ_NEXT(irq, next);
irqnum = ffs(irq->mask) - 1;
type = (irq->flags & 0x0c) ? IST_LEVEL : IST_EDGE;
return (isa_intr_establish(0, irqnum, type, level, fcn, arg));
}
int
pnpbios_getirqnum(pbt, resc, idx, irqp)
pnpbios_tag_t pbt;
struct pnpresources *resc;
int idx;
int *irqp;
{
struct pnp_irq *irq;
if (idx >= resc->numirq)
return (EINVAL);
irq = SIMPLEQ_FIRST(&resc->irq);
while (idx--)
irq = SIMPLEQ_NEXT(irq, next);
*irqp = ffs(irq->mask) - 1;
return (0);
}
int
pnpbios_getdmachan(pbt, resc, idx, chanp)
pnpbios_tag_t pbt;
struct pnpresources *resc;
int idx;
int *chanp;
{
struct pnp_dma *dma;
if (idx >= resc->numdma)
return (EINVAL);
dma = SIMPLEQ_FIRST(&resc->dma);
while (idx--)
dma = SIMPLEQ_NEXT(dma, next);
*chanp = ffs(dma->mask) - 1;
return (0);
}
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