329 lines
7.5 KiB
C
329 lines
7.5 KiB
C
/* $NetBSD: pci_eb164.c,v 1.13 1998/04/16 19:50:55 thorpej 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/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: pci_eb164.c,v 1.13 1998/04/16 19:50:55 thorpej Exp $");
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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_eb164.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_eb164_intr_map __P((void *, pcitag_t, int, int,
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pci_intr_handle_t *));
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const char *dec_eb164_intr_string __P((void *, pci_intr_handle_t));
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void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t,
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int, int (*func)(void *), void *));
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void dec_eb164_intr_disestablish __P((void *, void *));
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#define EB164_SIO_IRQ 4
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#define EB164_MAX_IRQ 24
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#define PCI_STRAY_MAX 5
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struct alpha_shared_intr *eb164_pci_intr;
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#ifdef EVCNT_COUNTERS
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struct evcnt eb164_intr_evcnt;
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#endif
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bus_space_tag_t eb164_intrgate_iot;
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bus_space_handle_t eb164_intrgate_ioh;
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void eb164_iointr __P((void *framep, unsigned long vec));
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extern void eb164_intr_enable __P((int irq)); /* pci_eb164_intr.S */
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extern void eb164_intr_disable __P((int irq)); /* pci_eb164_intr.S */
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void
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pci_eb164_pickintr(ccp)
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struct cia_config *ccp;
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{
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bus_space_tag_t iot = &ccp->cc_iot;
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pci_chipset_tag_t pc = &ccp->cc_pc;
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int i;
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pc->pc_intr_v = ccp;
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pc->pc_intr_map = dec_eb164_intr_map;
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pc->pc_intr_string = dec_eb164_intr_string;
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pc->pc_intr_establish = dec_eb164_intr_establish;
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pc->pc_intr_disestablish = dec_eb164_intr_disestablish;
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eb164_intrgate_iot = iot;
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if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0,
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&eb164_intrgate_ioh) != 0)
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panic("pci_eb164_pickintr: couldn't map interrupt PLD");
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for (i = 0; i < EB164_MAX_IRQ; i++)
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eb164_intr_disable(i);
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eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ);
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for (i = 0; i < EB164_MAX_IRQ; i++)
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alpha_shared_intr_set_maxstrays(eb164_pci_intr, i,
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PCI_STRAY_MAX);
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#if NSIO
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sio_intr_setup(pc, iot);
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eb164_intr_enable(EB164_SIO_IRQ);
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#endif
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set_iointr(eb164_iointr);
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}
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int
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dec_eb164_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 eb164_irq, pinbase, pinoff;
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#ifndef DIAGNOSTIC
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pinbase = pinoff = 0; /* XXX gcc -Wuninitialized */
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#endif
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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("dec_eb164_intr_map: bad interrupt pin %d\n", buspin);
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return 1;
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}
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alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL);
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switch (device) {
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/*
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* There might be a PCI IDE controller on one of the SIO's
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* functions, so go ahead and map this interrupt.
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*/
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case 8: /* SIO */
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eb164_irq = 4;
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break;
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case 11:
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eb164_irq = 5; /* IDE */
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break;
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case 5:
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case 6:
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case 7:
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case 9:
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switch (buspin) {
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case 1:
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pinbase = 0;
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break;
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case 2:
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case 3:
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case 4:
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pinbase = (buspin * 4) - 1;
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break;
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#ifdef DIAGNOSTIC
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default:
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panic("dec_eb164_intr_map: slot buspin switch");
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#endif
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};
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switch (device) {
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case 5:
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pinoff = 2;
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break;
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case 6:
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case 7:
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case 9:
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pinoff = device - 6;
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break;
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#ifdef DIAGNOSTIC
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default:
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panic("dec_eb164_intr_map: slot device switch");
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#endif
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}
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eb164_irq = pinoff + pinbase;
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break;
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default:
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panic("dec_eb164_intr_map: invalid device number %d\n",
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device);
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}
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if (eb164_irq > EB164_MAX_IRQ)
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panic("dec_eb164_intr_map: eb164_irq too large (%d)\n",
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eb164_irq);
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*ihp = eb164_irq;
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return (0);
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}
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const char *
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dec_eb164_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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#if 0
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struct cia_config *ccp = ccv;
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#endif
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static char irqstr[15]; /* 11 + 2 + NULL + sanity */
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if (ih > EB164_MAX_IRQ)
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panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih);
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sprintf(irqstr, "eb164 irq %d", ih);
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return (irqstr);
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}
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void *
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dec_eb164_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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#if 0
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struct cia_config *ccp = ccv;
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#endif
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void *cookie;
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if (ih > EB164_MAX_IRQ)
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panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih);
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cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL,
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level, func, arg, "eb164 irq");
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if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih))
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eb164_intr_enable(ih);
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return (cookie);
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}
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void
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dec_eb164_intr_disestablish(ccv, cookie)
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void *ccv, *cookie;
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{
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#if 0
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struct cia_config *ccp = ccv;
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#endif
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panic("dec_eb164_intr_disestablish not implemented"); /* XXX */
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}
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void
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eb164_iointr(framep, vec)
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void *framep;
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unsigned long vec;
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{
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int irq;
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if (vec >= 0x900) {
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if (vec >= 0x900 + (EB164_MAX_IRQ << 4))
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panic("eb164_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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eb164_intr_evcnt.ev_count++;
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#else
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if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN)
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panic("eb164 interrupt counter sizes inconsistent");
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intrcnt[INTRCNT_EB164_IRQ + irq]++;
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#endif
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if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) {
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alpha_shared_intr_stray(eb164_pci_intr, irq,
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"eb164 irq");
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if (eb164_pci_intr[irq].intr_nstrays ==
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eb164_pci_intr[irq].intr_maxstrays)
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eb164_intr_disable(irq);
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}
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return;
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}
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#if NSIO
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if (vec >= 0x800) {
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sio_iointr(framep, vec);
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return;
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}
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#endif
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panic("eb164_iointr: weird vec 0x%x\n", vec);
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}
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#if 0 /* THIS DOES NOT WORK! see pci_eb164_intr.S. */
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u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff };
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void
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eb164_intr_enable(irq)
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int irq;
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{
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int byte = (irq / 8), bit = (irq % 8);
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#if 1
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printf("eb164_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit);
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#endif
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eb164_intr_mask[byte] &= ~(1 << bit);
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bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
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eb164_intr_mask[byte]);
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}
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void
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eb164_intr_disable(irq)
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int irq;
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{
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int byte = (irq / 8), bit = (irq % 8);
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#if 1
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printf("eb164_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit);
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#endif
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eb164_intr_mask[byte] |= (1 << bit);
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bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
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eb164_intr_mask[byte]);
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}
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#endif
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