1/* $NetBSD: obmem.c,v 1.25 2008/04/28 20:23:38 martin Exp $ */ 2 3/*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass and Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * On-board MEMory (OBMEM) 34 * Used by frame buffers... 35 */ 36 37#include <sys/cdefs.h> 38__KERNEL_RCSID(0, "$NetBSD: obmem.c,v 1.25 2008/04/28 20:23:38 martin Exp $"); 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/device.h> 43 44#include <uvm/uvm_extern.h> 45 46#include <machine/autoconf.h> 47#include <machine/bus.h> 48#include <sun3/sun3/obmem.h> 49 50static int obmem_match(device_t, cfdata_t, void *); 51static void obmem_attach(device_t, device_t, void *); 52 53struct obmem_softc { 54 device_t sc_dev; 55 bus_space_tag_t sc_bustag; 56 bus_dma_tag_t sc_dmatag; 57}; 58 59CFATTACH_DECL_NEW(obmem, sizeof(struct obmem_softc), 60 obmem_match, obmem_attach, NULL, NULL); 61 62static int obmem_attached; 63 64static int obmem_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t, 65 int, vaddr_t, bus_space_handle_t *); 66static paddr_t obmem_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t, 67 int, int); 68 69static struct sun68k_bus_space_tag obmem_space_tag = { 70 NULL, /* cookie */ 71 NULL, /* parent bus space tag */ 72 obmem_bus_map, /* bus_space_map */ 73 NULL, /* bus_space_unmap */ 74 NULL, /* bus_space_subregion */ 75 NULL, /* bus_space_barrier */ 76 obmem_bus_mmap, /* bus_space_mmap */ 77 NULL, /* bus_intr_establish */ 78 NULL, /* bus_space_peek_N */ 79 NULL /* bus_space_poke_N */ 80}; 81 82static int 83obmem_match(device_t parent, cfdata_t cf, void *aux) 84{ 85 struct confargs *ca = aux; 86 87 if (obmem_attached) 88 return 0; 89 90 if (ca->ca_bustype != BUS_OBMEM) 91 return 0; 92 93 if (ca->ca_name != NULL && strcmp(cf->cf_name, ca->ca_name) != 0) 94 return 0; 95 96 return 1; 97} 98 99static void 100obmem_attach(device_t parent, device_t self, void *aux) 101{ 102 struct confargs *ca = aux; 103 struct obmem_softc *sc = device_private(self); 104 struct confargs obma; 105 106 obmem_attached = 1; 107 sc->sc_dev = self; 108 109 aprint_normal("\n"); 110 111 sc->sc_bustag = ca->ca_bustag; 112 sc->sc_dmatag = ca->ca_dmatag; 113 114 obmem_space_tag.cookie = sc; 115 obmem_space_tag.parent = sc->sc_bustag; 116 117 obma = *ca; 118 obma.ca_bustag = &obmem_space_tag; 119 120 /* We know ca_bustype == BUS_OBMEM */ 121 config_search_ia(bus_scan, self, "obmem", &obma); 122} 123 124int 125obmem_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, 126 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp) 127{ 128 struct obmem_softc *sc = t->cookie; 129 130 return bus_space_map2(sc->sc_bustag, PMAP_OBMEM, paddr, size, flags, 131 vaddr, hp); 132} 133 134paddr_t 135obmem_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off, 136 int prot, int flags) 137{ 138 struct obmem_softc *sc = t->cookie; 139 140 return bus_space_mmap2(sc->sc_bustag, PMAP_OBMEM, paddr, off, prot, 141 flags); 142} 143