0fb6b9a8f8
Rather than an "iointr" routine that decomposes a vector into an IRQ, we maintain a vector table directly, hooking up each "iointr" routine at the correct vector. This also allows us to hook device interrupts up to specific vectors (c.f. Jensen). We can shave even more cycles off, here, and I will, but it requires some changes to the alpha_shared_intr stuff.
270 lines
6.1 KiB
C
270 lines
6.1 KiB
C
/* $NetBSD: pci_axppci_33.c,v 1.27 2001/07/27 00:25:20 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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* Authors: Jeffrey Hsu and 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_axppci_33.c,v 1.27 2001/07/27 00:25:20 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/device.h>
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#include <uvm/uvm_extern.h>
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#include <machine/autoconf.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/isa/isavar.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/lcavar.h>
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#include <alpha/pci/pci_axppci_33.h>
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#include <alpha/pci/siovar.h>
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#include <alpha/pci/sioreg.h>
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#include "sio.h"
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int dec_axppci_33_intr_map __P((struct pci_attach_args *, pci_intr_handle_t *));
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const char *dec_axppci_33_intr_string __P((void *, pci_intr_handle_t));
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const struct evcnt *dec_axppci_33_intr_evcnt __P((void *, pci_intr_handle_t));
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void *dec_axppci_33_intr_establish __P((void *, pci_intr_handle_t,
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int, int (*func)(void *), void *));
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void dec_axppci_33_intr_disestablish __P((void *, void *));
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#define LCA_SIO_DEVICE 7 /* XXX */
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void
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pci_axppci_33_pickintr(lcp)
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struct lca_config *lcp;
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{
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bus_space_tag_t iot = &lcp->lc_iot;
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pci_chipset_tag_t pc = &lcp->lc_pc;
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pcireg_t sioclass;
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int sioII;
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/* XXX MAGIC NUMBER */
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sioclass = pci_conf_read(pc, pci_make_tag(pc, 0, LCA_SIO_DEVICE, 0),
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PCI_CLASS_REG);
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sioII = (sioclass & 0xff) >= 3;
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if (!sioII)
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printf("WARNING: SIO NOT SIO II... NO BETS...\n");
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pc->pc_intr_v = lcp;
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pc->pc_intr_map = dec_axppci_33_intr_map;
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pc->pc_intr_string = dec_axppci_33_intr_string;
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pc->pc_intr_evcnt = dec_axppci_33_intr_evcnt;
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pc->pc_intr_establish = dec_axppci_33_intr_establish;
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pc->pc_intr_disestablish = dec_axppci_33_intr_disestablish;
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/* Not supported on AXPpci33. */
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pc->pc_pciide_compat_intr_establish = NULL;
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#if NSIO
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sio_intr_setup(pc, iot);
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#else
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panic("pci_axppci_33_pickintr: no I/O interrupt handler (no sio)");
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#endif
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}
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int
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dec_axppci_33_intr_map(pa, ihp)
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struct pci_attach_args *pa;
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pci_intr_handle_t *ihp;
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{
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pcitag_t bustag = pa->pa_intrtag;
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int buspin = pa->pa_intrpin;
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pci_chipset_tag_t pc = pa->pa_pc;
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int device, pirq;
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pcireg_t pirqreg;
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u_int8_t pirqline;
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#ifndef DIAGNOSTIC
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pirq = 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_axppci_33_intr_map: bad interrupt pin %d\n",
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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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case 6: /* NCR SCSI */
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pirq = 3;
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break;
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case 11: /* slot 1 */
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switch (buspin) {
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case PCI_INTERRUPT_PIN_A:
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case PCI_INTERRUPT_PIN_D:
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pirq = 0;
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break;
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case PCI_INTERRUPT_PIN_B:
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pirq = 2;
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break;
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case PCI_INTERRUPT_PIN_C:
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pirq = 1;
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break;
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#ifdef DIAGNOSTIC
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default: /* XXX gcc -Wuninitialized */
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panic("dec_axppci_33_intr_map: bogus PCI pin %d\n",
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buspin);
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#endif
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};
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break;
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case 12: /* slot 2 */
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switch (buspin) {
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case PCI_INTERRUPT_PIN_A:
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case PCI_INTERRUPT_PIN_D:
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pirq = 1;
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break;
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case PCI_INTERRUPT_PIN_B:
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pirq = 0;
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break;
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case PCI_INTERRUPT_PIN_C:
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pirq = 2;
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break;
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#ifdef DIAGNOSTIC
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default: /* XXX gcc -Wuninitialized */
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panic("dec_axppci_33_intr_map: bogus PCI pin %d\n",
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buspin);
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#endif
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};
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break;
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case 8: /* slot 3 */
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switch (buspin) {
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case PCI_INTERRUPT_PIN_A:
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case PCI_INTERRUPT_PIN_D:
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pirq = 2;
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break;
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case PCI_INTERRUPT_PIN_B:
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pirq = 1;
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break;
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case PCI_INTERRUPT_PIN_C:
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pirq = 0;
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break;
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#ifdef DIAGNOSTIC
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default: /* XXX gcc -Wuninitialized */
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panic("dec_axppci_33_intr_map bogus: PCI pin %d\n",
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buspin);
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#endif
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};
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break;
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default:
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printf("dec_axppci_33_intr_map: weird device number %d\n",
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device);
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return 1;
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}
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pirqreg = pci_conf_read(pc, pci_make_tag(pc, 0, LCA_SIO_DEVICE, 0),
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SIO_PCIREG_PIRQ_RTCTRL);
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#if 0
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printf("dec_axppci_33_intr_map: device %d pin %c: pirq %d, reg = %x\n",
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device, '@' + buspin, pirq, pirqreg);
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#endif
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pirqline = (pirqreg >> (pirq * 8)) & 0xff;
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if ((pirqline & 0x80) != 0)
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return 1; /* not routed? */
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pirqline &= 0xf;
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#if 0
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printf("dec_axppci_33_intr_map: device %d pin %c: mapped to line %d\n",
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device, '@' + buspin, pirqline);
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#endif
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*ihp = pirqline;
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return (0);
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}
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const char *
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dec_axppci_33_intr_string(lcv, ih)
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void *lcv;
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pci_intr_handle_t ih;
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{
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#if 0
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struct lca_config *lcp = lcv;
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#endif
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return sio_intr_string(NULL /*XXX*/, ih);
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}
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const struct evcnt *
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dec_axppci_33_intr_evcnt(lcv, ih)
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void *lcv;
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pci_intr_handle_t ih;
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{
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#if 0
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struct lca_config *lcp = lcv;
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#endif
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return sio_intr_evcnt(NULL /*XXX*/, ih);
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}
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void *
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dec_axppci_33_intr_establish(lcv, ih, level, func, arg)
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void *lcv, *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 lca_config *lcp = lcv;
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#endif
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return sio_intr_establish(NULL /*XXX*/, ih, IST_LEVEL, level, func,
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arg);
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}
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void
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dec_axppci_33_intr_disestablish(lcv, cookie)
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void *lcv, *cookie;
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{
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#if 0
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struct lca_config *lcp = lcv;
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#endif
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sio_intr_disestablish(NULL /*XXX*/, cookie);
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}
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