/* $NetBSD: uba_mainbus.c,v 1.15 2025/07/14 12:38:11 hans Exp $ */ /* * Copyright (c) 1982, 1986 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)uba.c 7.10 (Berkeley) 12/16/90 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 */ /* * Copyright (c) 1996 Jonathan Stone. * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)uba.c 7.10 (Berkeley) 12/16/90 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: uba_mainbus.c,v 1.15 2025/07/14 12:38:11 hans Exp $"); #define _VAX_BUS_DMA_PRIVATE #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/cpu.h> #include <sys/device.h> #include <machine/nexus.h> #include <machine/sgmap.h> #include <machine/mainbus.h> #include <dev/qbus/ubavar.h> #include <vax/uba/uba_common.h> #include "ioconf.h" /* Some Qbus-specific defines */ #define QBASIZE (8192 * VAX_NBPG) #define QBAMAP 0x20088000 #define QBAMEM 0x30000000 #define QIOPAGE 0x20000000 /* * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems. * It has an address space of 4MB (22 address bits), therefore the name, * and is hardware compatible with all 16 and 18 bits Q-bus devices. */ static int qba_match(device_t, cfdata_t, void *); static void qba_attach(device_t, device_t, void *); static void qba_beforescan(struct uba_softc*); static void qba_init(struct uba_softc*); CFATTACH_DECL_NEW(uba_mainbus, sizeof(struct uba_vsoftc), qba_match, qba_attach, NULL, NULL); extern struct vax_bus_space vax_mem_bus_space; int qba_match(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args * const ma = aux; return !strcmp(uba_cd.cd_name, ma->ma_type); } void qba_attach(device_t parent, device_t self, void *aux) { struct mainbus_attach_args * const ma = aux; struct uba_vsoftc * const sc = device_private(self); paddr_t paddr; vaddr_t vaddr; int *mapp; int pgnum; int val; int start; aprint_normal(": Q22\n"); sc->uv_sc.uh_dev = self; /* * Fill in bus specific data. */ sc->uv_sc.uh_beforescan = qba_beforescan; sc->uv_sc.uh_ubainit = qba_init; sc->uv_sc.uh_iot = ma->ma_iot; sc->uv_sc.uh_dmat = &sc->uv_dmat; /* * Fill in variables used by the sgmap system. */ sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */ sc->uv_addr = QBAMAP; /* Physical address of map registers */ uba_dma_init(sc); mapp = (int *)vax_map_physmem(QBAMAP, QBASIZE/VAX_NBPG); val = 0; for (paddr = QBAMEM, pgnum = 0, start = -1; paddr < QBAMEM + QBASIZE - 8192; paddr += VAX_NBPG, pgnum += 1) { val = mapp[pgnum]; mapp[pgnum] = 0; vaddr = vax_map_physmem(paddr, 1); if (badaddr((void *)vaddr, 2) == 0) { if (start < 0) start = pgnum; } else if (start >= 0) { aprint_normal("sgmap exclusion at %#x - %#x\n", start*VAX_NBPG, pgnum*VAX_NBPG - 1); vax_sgmap_reserve(start*VAX_NBPG, (pgnum - start)*VAX_NBPG, &sc->uv_sgmap); start = -1; } vax_unmap_physmem(vaddr, 1); mapp[pgnum] = val; } vax_unmap_physmem((vaddr_t)mapp, QBASIZE/VAX_NBPG); if (start >= 0) { aprint_normal("sgmap exclusion at %#x - %#x\n", start*VAX_NBPG, pgnum*VAX_NBPG - 1); vax_sgmap_reserve(start*VAX_NBPG, (pgnum - start)*VAX_NBPG, &sc->uv_sgmap); } /* reserve I/O space within Qbus */ vax_sgmap_reserve(0x3fe000, 0x400000 - 0x3fe000, &sc->uv_sgmap); uba_attach(&sc->uv_sc, QIOPAGE); } /* * Called when the QBA is set up; to enable DMA access from * QBA devices to main memory. */ void qba_beforescan(struct uba_softc *sc) { #define QIPCR 0x1f40 #define Q_LMEAE 0x20 bus_space_write_2(sc->uh_iot, sc->uh_ioh, QIPCR, Q_LMEAE); } void qba_init(struct uba_softc *sc) { mtpr(0, PR_IUR); DELAY(500000); qba_beforescan(sc); }
