NetBSD/sys/arch/alpha/pci/pci_kn20aa.c

369 lines
8.4 KiB
C

/* $NetBSD: pci_kn20aa.c,v 1.18 1996/10/13 03:00:12 christos Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/ciareg.h>
#include <alpha/pci/ciavar.h>
#include <alpha/pci/pci_kn20aa.h>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif
#include "sio.h"
#if NSIO
#include <alpha/pci/siovar.h>
#endif
int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int,
pci_intr_handle_t *));
const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t));
void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_kn20aa_intr_disestablish __P((void *, void *));
#define KN20AA_PCEB_IRQ 31
#define KN20AA_MAX_IRQ 32
#define PCI_STRAY_MAX 5
struct kn20aa_intrhand {
TAILQ_ENTRY(kn20aa_intrhand) ih_q;
int (*ih_fun)();
void *ih_arg;
u_long ih_count;
int ih_level;
};
TAILQ_HEAD(kn20aa_intrchain, kn20aa_intrhand);
struct kn20aa_intrchain kn20aa_pci_intrs[KN20AA_MAX_IRQ];
int kn20aa_pci_strayintrcnt[KN20AA_MAX_IRQ];
#ifdef EVCNT_COUNTERS
struct evcnt kn20aa_intr_evcnt;
#endif
void kn20aa_pci_strayintr __P((int irq));
void kn20aa_iointr __P((void *framep, unsigned long vec));
void kn20aa_enable_intr __P((int irq));
void kn20aa_disable_intr __P((int irq));
struct kn20aa_intrhand *kn20aa_attach_intr __P((struct kn20aa_intrchain *,
int, int (*) (void *), void *));
void
pci_kn20aa_pickintr(ccp)
struct cia_config *ccp;
{
int i;
struct kn20aa_intrhand *nintrhand;
bus_chipset_tag_t bc = &ccp->cc_bc;
pci_chipset_tag_t pc = &ccp->cc_pc;
for (i = 0; i < KN20AA_MAX_IRQ; i++)
TAILQ_INIT(&kn20aa_pci_intrs[i]);
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_kn20aa_intr_map;
pc->pc_intr_string = dec_kn20aa_intr_string;
pc->pc_intr_establish = dec_kn20aa_intr_establish;
pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish;
#if NSIO
sio_intr_setup(bc);
#endif
set_iointr(kn20aa_iointr);
#if NSIO
kn20aa_enable_intr(KN20AA_PCEB_IRQ);
#if 0 /* XXX init PCEB interrupt handler? */
kn20aa_attach_intr(&kn20aa_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???);
#endif
#endif
}
int
dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp)
void *ccv;
pcitag_t bustag;
int buspin, line;
pci_intr_handle_t *ihp;
{
struct cia_config *ccp = ccv;
pci_chipset_tag_t pc = &ccp->cc_pc;
int device;
int kn20aa_irq;
void *ih;
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin > 4) {
printf("pci_map_int: bad interrupt pin %d\n", buspin);
return 1;
}
/*
* Slot->interrupt translation. Appears to work, though it
* may not hold up forever.
*
* The DEC engineers who did this hardware obviously engaged
* in random drug testing.
*/
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch (device) {
case 11:
case 12:
kn20aa_irq = ((device - 11) + 0) * 4;
break;
case 7:
kn20aa_irq = 8;
break;
case 9:
kn20aa_irq = 12;
break;
case 6: /* 21040 on AlphaStation 500 */
kn20aa_irq = 13;
break;
case 8:
kn20aa_irq = 16;
break;
default:
#ifdef KN20AA_BOGUS_IRQ_FROB
*ihp = 0xdeadbeef;
printf("\n\n BOGUS INTERRUPT MAPPING: dev %d, pin %d\n",
device, buspin);
return (0);
#endif
panic("pci_kn20aa_map_int: invalid device number %d\n",
device);
}
kn20aa_irq += buspin - 1;
if (kn20aa_irq > KN20AA_MAX_IRQ)
panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n",
kn20aa_irq);
*ihp = kn20aa_irq;
return (0);
}
const char *
dec_kn20aa_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
struct cia_config *ccp = ccv;
static char irqstr[15]; /* 11 + 2 + NULL + sanity */
#ifdef KN20AA_BOGUS_IRQ_FROB
if (ih == 0xdeadbeef) {
sprintf(irqstr, "BOGUS");
return (irqstr);
}
#endif
if (ih > KN20AA_MAX_IRQ)
panic("dec_kn20aa_a50_intr_string: bogus kn20aa IRQ 0x%x\n",
ih);
sprintf(irqstr, "kn20aa irq %d", ih);
return (irqstr);
}
void *
dec_kn20aa_intr_establish(ccv, ih, level, func, arg)
void *ccv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
struct cia_config *ccp = ccv;
void *cookie;
#ifdef KN20AA_BOGUS_IRQ_FROB
if (ih == 0xdeadbeef) {
int i;
char chars[10];
printf("dec_kn20aa_intr_establish: BOGUS IRQ\n");
do {
printf("IRQ to enable? ");
getstr(chars, 10);
i = atoi(chars);
} while (i < 0 || i > 32);
printf("ENABLING IRQ %d\n", i);
kn20aa_enable_intr(i);
return ((void *)0xbabefacedeadbeef);
}
#endif
if (ih > KN20AA_MAX_IRQ)
panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n",
ih);
cookie = kn20aa_attach_intr(&kn20aa_pci_intrs[ih], level, func, arg);
kn20aa_enable_intr(ih);
return (cookie);
}
void
dec_kn20aa_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
struct cia_config *ccp = ccv;
panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */
}
/*
* caught a stray interrupt; notify if not too many seen already.
*/
void
kn20aa_pci_strayintr(irq)
int irq;
{
kn20aa_pci_strayintrcnt[irq]++;
if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
kn20aa_disable_intr(irq);
log(LOG_ERR, "stray kn20aa irq %d\n", irq);
if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
log(LOG_ERR, "disabling interrupts on kn20aa irq %d\n", irq);
}
void
kn20aa_iointr(framep, vec)
void *framep;
unsigned long vec;
{
struct kn20aa_intrhand *ih;
int irq, handled;
if (vec >= 0x900) {
if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4))
panic("kn20aa_iointr: vec 0x%x out of range\n", vec);
irq = (vec - 0x900) >> 4;
#ifdef EVCNT_COUNTERS
kn20aa_intr_evcnt.ev_count++;
#else
if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN)
panic("kn20aa interrupt counter sizes inconsistent");
intrcnt[INTRCNT_KN20AA_IRQ + irq]++;
#endif
for (ih = kn20aa_pci_intrs[irq].tqh_first, handled = 0;
ih != NULL; ih = ih->ih_q.tqe_next) {
int rv;
rv = (*ih->ih_fun)(ih->ih_arg);
ih->ih_count++;
handled = handled || (rv != 0);
}
if (!handled)
kn20aa_pci_strayintr(irq);
return;
}
if (vec >= 0x800) {
#if NSIO
sio_iointr(framep, vec);
#endif
return;
}
panic("kn20aa_iointr: weird vec 0x%x\n", vec);
}
void
kn20aa_enable_intr(irq)
int irq;
{
/*
* From disassembling small bits of the OSF/1 kernel:
* the following appears to enable a given interrupt request.
* "blech." I'd give valuable body parts for better docs or
* for a good decompiler.
*/
alpha_mb();
REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */
alpha_mb();
}
void
kn20aa_disable_intr(irq)
int irq;
{
alpha_mb();
REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */
alpha_mb();
}
struct kn20aa_intrhand *
kn20aa_attach_intr(chain, level, func, arg)
struct kn20aa_intrchain *chain;
int level;
int (*func) __P((void *));
void *arg;
{
struct kn20aa_intrhand *nintrhand;
nintrhand = (struct kn20aa_intrhand *)
malloc(sizeof *nintrhand, M_DEVBUF, M_WAITOK);
nintrhand->ih_fun = func;
nintrhand->ih_arg = arg;
nintrhand->ih_count = 0;
nintrhand->ih_level = level;
TAILQ_INSERT_TAIL(chain, nintrhand, ih_q);
return (nintrhand);
}