369 lines
8.4 KiB
C
369 lines
8.4 KiB
C
/* $NetBSD: pci_kn20aa.c,v 1.16 1996/08/19 04:28:25 cgd Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/syslog.h>
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#include <vm/vm.h>
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#include <machine/autoconf.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <alpha/pci/ciareg.h>
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#include <alpha/pci/ciavar.h>
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#include <alpha/pci/pci_kn20aa.h>
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#ifndef EVCNT_COUNTERS
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#include <machine/intrcnt.h>
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#endif
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#include "sio.h"
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#if NSIO
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#include <alpha/pci/siovar.h>
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#endif
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int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int,
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pci_intr_handle_t *));
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const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t));
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void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t,
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int, int (*func)(void *), void *));
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void dec_kn20aa_intr_disestablish __P((void *, void *));
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#define KN20AA_PCEB_IRQ 31
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#define KN20AA_MAX_IRQ 32
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#define PCI_STRAY_MAX 5
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struct kn20aa_intrhand {
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TAILQ_ENTRY(kn20aa_intrhand) ih_q;
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int (*ih_fun)();
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void *ih_arg;
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u_long ih_count;
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int ih_level;
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};
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TAILQ_HEAD(kn20aa_intrchain, kn20aa_intrhand);
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struct kn20aa_intrchain kn20aa_pci_intrs[KN20AA_MAX_IRQ];
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int kn20aa_pci_strayintrcnt[KN20AA_MAX_IRQ];
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#ifdef EVCNT_COUNTERS
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struct evcnt kn20aa_intr_evcnt;
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#endif
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void kn20aa_pci_strayintr __P((int irq));
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void kn20aa_iointr __P((void *framep, unsigned long vec));
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void kn20aa_enable_intr __P((int irq));
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void kn20aa_disable_intr __P((int irq));
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struct kn20aa_intrhand *kn20aa_attach_intr __P((struct kn20aa_intrchain *,
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int, int (*) (void *), void *));
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void
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pci_kn20aa_pickintr(ccp)
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struct cia_config *ccp;
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{
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int i;
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struct kn20aa_intrhand *nintrhand;
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bus_chipset_tag_t bc = &ccp->cc_bc;
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pci_chipset_tag_t pc = &ccp->cc_pc;
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for (i = 0; i < KN20AA_MAX_IRQ; i++)
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TAILQ_INIT(&kn20aa_pci_intrs[i]);
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pc->pc_intr_v = ccp;
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pc->pc_intr_map = dec_kn20aa_intr_map;
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pc->pc_intr_string = dec_kn20aa_intr_string;
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pc->pc_intr_establish = dec_kn20aa_intr_establish;
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pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish;
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#if NSIO
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sio_intr_setup(bc);
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#endif
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set_iointr(kn20aa_iointr);
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#if NSIO
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kn20aa_enable_intr(KN20AA_PCEB_IRQ);
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#if 0 /* XXX init PCEB interrupt handler? */
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kn20aa_attach_intr(&kn20aa_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???);
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#endif
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#endif
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}
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int
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dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp)
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void *ccv;
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pcitag_t bustag;
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int buspin, line;
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pci_intr_handle_t *ihp;
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{
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struct cia_config *ccp = ccv;
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pci_chipset_tag_t pc = &ccp->cc_pc;
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int device;
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int kn20aa_irq;
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void *ih;
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if (buspin == 0) {
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/* No IRQ used. */
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return 1;
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}
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if (buspin > 4) {
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printf("pci_map_int: bad interrupt pin %d\n", buspin);
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return 1;
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}
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/*
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* Slot->interrupt translation. Appears to work, though it
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* may not hold up forever.
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*
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* The DEC engineers who did this hardware obviously engaged
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* in random drug testing.
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*/
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pci_decompose_tag(pc, bustag, NULL, &device, NULL);
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switch (device) {
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case 11:
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case 12:
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kn20aa_irq = ((device - 11) + 0) * 4;
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break;
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case 7:
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kn20aa_irq = 8;
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break;
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case 9:
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kn20aa_irq = 12;
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break;
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case 6: /* 21040 on AlphaStation 500 */
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kn20aa_irq = 13;
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break;
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case 8:
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kn20aa_irq = 16;
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break;
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default:
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#ifdef KN20AA_BOGUS_IRQ_FROB
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*ihp = 0xdeadbeef;
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printf("\n\n BOGUS INTERRUPT MAPPING: dev %d, pin %d\n",
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device, buspin);
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return (0);
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#endif
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panic("pci_kn20aa_map_int: invalid device number %d\n",
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device);
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}
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kn20aa_irq += buspin - 1;
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if (kn20aa_irq > KN20AA_MAX_IRQ)
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panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n",
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kn20aa_irq);
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*ihp = kn20aa_irq;
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return (0);
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}
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const char *
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dec_kn20aa_intr_string(ccv, ih)
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void *ccv;
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pci_intr_handle_t ih;
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{
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struct cia_config *ccp = ccv;
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static char irqstr[15]; /* 11 + 2 + NULL + sanity */
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#ifdef KN20AA_BOGUS_IRQ_FROB
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if (ih == 0xdeadbeef) {
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sprintf(irqstr, "BOGUS");
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return (irqstr);
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}
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#endif
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if (ih > KN20AA_MAX_IRQ)
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panic("dec_kn20aa_a50_intr_string: bogus kn20aa IRQ 0x%x\n",
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ih);
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sprintf(irqstr, "kn20aa irq %d", ih);
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return (irqstr);
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}
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void *
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dec_kn20aa_intr_establish(ccv, ih, level, func, arg)
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void *ccv, *arg;
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pci_intr_handle_t ih;
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int level;
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int (*func) __P((void *));
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{
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struct cia_config *ccp = ccv;
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void *cookie;
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#ifdef KN20AA_BOGUS_IRQ_FROB
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if (ih == 0xdeadbeef) {
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int i;
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char chars[10];
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printf("dec_kn20aa_intr_establish: BOGUS IRQ\n");
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do {
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printf("IRQ to enable? ");
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getstr(chars, 10);
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i = atoi(chars);
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} while (i < 0 || i > 32);
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printf("ENABLING IRQ %d\n", i);
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kn20aa_enable_intr(i);
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return ((void *)0xbabefacedeadbeef);
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}
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#endif
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if (ih > KN20AA_MAX_IRQ)
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panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n",
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ih);
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cookie = kn20aa_attach_intr(&kn20aa_pci_intrs[ih], level, func, arg);
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kn20aa_enable_intr(ih);
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return (cookie);
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}
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void
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dec_kn20aa_intr_disestablish(ccv, cookie)
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void *ccv, *cookie;
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{
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struct cia_config *ccp = ccv;
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panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */
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}
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/*
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* caught a stray interrupt; notify if not too many seen already.
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*/
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void
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kn20aa_pci_strayintr(irq)
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int irq;
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{
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kn20aa_pci_strayintrcnt[irq]++;
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if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
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kn20aa_disable_intr(irq);
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log(LOG_ERR, "stray kn20aa irq %d\n", irq);
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if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
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log(LOG_ERR, "disabling interrupts on kn20aa irq %d\n", irq);
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}
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void
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kn20aa_iointr(framep, vec)
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void *framep;
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unsigned long vec;
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{
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struct kn20aa_intrhand *ih;
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int irq, handled;
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if (vec >= 0x900) {
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if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4))
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panic("kn20aa_iointr: vec 0x%x out of range\n", vec);
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irq = (vec - 0x900) >> 4;
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#ifdef EVCNT_COUNTERS
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kn20aa_intr_evcnt.ev_count++;
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#else
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if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN)
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panic("kn20aa interrupt counter sizes inconsistent");
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intrcnt[INTRCNT_KN20AA_IRQ + irq]++;
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#endif
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for (ih = kn20aa_pci_intrs[irq].tqh_first, handled = 0;
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ih != NULL; ih = ih->ih_q.tqe_next) {
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int rv;
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rv = (*ih->ih_fun)(ih->ih_arg);
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ih->ih_count++;
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handled = handled || (rv != 0);
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}
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if (!handled)
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kn20aa_pci_strayintr(irq);
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return;
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}
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if (vec >= 0x800) {
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#if NSIO
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sio_iointr(framep, vec);
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#endif
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return;
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}
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panic("kn20aa_iointr: weird vec 0x%x\n", vec);
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}
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void
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kn20aa_enable_intr(irq)
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int irq;
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{
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/*
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* From disassembling small bits of the OSF/1 kernel:
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* the following appears to enable a given interrupt request.
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* "blech." I'd give valuable body parts for better docs or
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* for a good decompiler.
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*/
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alpha_mb();
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REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */
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alpha_mb();
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}
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void
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kn20aa_disable_intr(irq)
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int irq;
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{
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alpha_mb();
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REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */
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alpha_mb();
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}
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struct kn20aa_intrhand *
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kn20aa_attach_intr(chain, level, func, arg)
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struct kn20aa_intrchain *chain;
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int level;
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int (*func) __P((void *));
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void *arg;
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{
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struct kn20aa_intrhand *nintrhand;
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nintrhand = (struct kn20aa_intrhand *)
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malloc(sizeof *nintrhand, M_DEVBUF, M_WAITOK);
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nintrhand->ih_fun = func;
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nintrhand->ih_arg = arg;
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nintrhand->ih_count = 0;
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nintrhand->ih_level = level;
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TAILQ_INSERT_TAIL(chain, nintrhand, ih_q);
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return (nintrhand);
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}
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