/* $OpenBSD: vxtbus.c,v 1.2 2006/08/30 19:23:57 miod Exp $ */ /* * Copyright (c) 2006 Miodrag Vallat. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice, this permission notice, and the disclaimer below * appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/malloc.h> #include <sys/evcount.h> #include <sys/queue.h> #include <machine/cpu.h> #include <machine/nexus.h> #include <machine/scb.h> #include <vax/vxt/vxtbusvar.h> struct vxtbus_softc { struct device sc_dev; LIST_HEAD(, vxtbus_ih) sc_intrlist; }; void vxtbus_attach(struct device *, struct device *, void *); int vxtbus_match(struct device *, void*, void *); struct cfdriver vxtbus_cd = { NULL, "vxtbus", DV_DULL }; struct cfattach vxtbus_ca = { sizeof(struct vxtbus_softc), vxtbus_match, vxtbus_attach }; void vxtbus_intr(void *); int vxtbus_print(void *, const char *); int vxtbus_match(struct device *parent, void *vcf, void *aux) { struct mainbus_attach_args *maa = aux; return (maa->maa_bustype == VAX_VXTBUS ? 1 : 0); } void vxtbus_attach(struct device *parent, struct device *self, void *aux) { struct vxtbus_softc *sc = (void *)self; struct bp_conf bp; LIST_INIT(&sc->sc_intrlist); scb_vecalloc(VXT_INTRVEC, vxtbus_intr, sc, SCB_ISTACK, NULL); printf("\n"); bp.type = "sgec"; config_found(self, &bp, vxtbus_print); bp.type = "qsc"; config_found(self, &bp, vxtbus_print); bp.type = "lcspx"; config_found(self, &bp, vxtbus_print); } int vxtbus_print(void *aux, const char *name) { struct bp_conf *bp = aux; if (name) printf("%s at %s", bp->type, name); return (UNCONF); } /* * VXT2000 interrupt code. * * All device interrupts end up on the same vector, which is controllable * by the SC26C94 chip. * * Interrupts are handled at spl4 (ipl 0x14). * * The following routines implement shared interrupts for vxtbus subdevices. */ struct vxtbus_ih { LIST_ENTRY(vxtbus_ih) ih_link; int (*ih_fn)(void *); void * ih_arg; int ih_vec; struct evcount ih_cnt; }; void vxtbus_intr_establish(const char *name, int ipl, int (*fn)(void *), void *arg) { struct vxtbus_softc *sc = (void *)vxtbus_cd.cd_devs[0]; struct vxtbus_ih *ih; ih = (struct vxtbus_ih *)malloc(sizeof(*ih), M_DEVBUF, M_WAITOK); ih->ih_fn = fn; ih->ih_arg = arg; ih->ih_vec = VXT_INTRVEC; evcount_attach(&ih->ih_cnt, name, (void *)&ih->ih_vec, &evcount_intr); LIST_INSERT_HEAD(&sc->sc_intrlist, ih, ih_link); } void vxtbus_intr(void *arg) { struct vxtbus_softc *sc = arg; struct vxtbus_ih *ih; int rc; #ifdef DIAGNOSTIC int handled = 0; static int strayintr = 0; #endif LIST_FOREACH(ih, &sc->sc_intrlist, ih_link) { rc = (*ih->ih_fn)(ih->ih_arg); if (rc != 0) { #ifdef DIAGNOSTIC handled = 1; #endif ih->ih_cnt.ec_count++; if (rc > 0) break; } } #ifdef DIAGNOSTIC if (handled == 0) { if (++strayintr == 10) panic("%s: too many stray interrupts", sc->sc_dev.dv_xname); else printf("%s: stray interrupt\n", sc->sc_dev.dv_xname); } #endif }