vme.c revision 1.13
1 /* $NetBSD: vme.c,v 1.13 2007/02/03 16:58:08 tsutsui 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 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: vme.c,v 1.13 2007/02/03 16:58:08 tsutsui Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 46 #include <uvm/uvm_extern.h> 47 48 #define _SUN68K_BUS_DMA_PRIVATE 49 #include <machine/autoconf.h> 50 #include <machine/bus.h> 51 #include <machine/dvma.h> 52 #include <machine/pmap.h> 53 54 #include <sun3/sun3x/vme.h> 55 56 /* Does this machine have a VME bus? */ 57 extern int cpu_has_vme; 58 59 /* 60 * Convert vme unit number to bus type, 61 * but only for supported bus types. 62 * (See autoconf.h and vme.h) 63 */ 64 #define VME_UNITS 6 65 static const struct { 66 int bustype; 67 const char *name; 68 int pmtype; 69 vaddr_t base; 70 vaddr_t mask; 71 } vme_info[VME_UNITS] = { 72 { BUS_VME16D16, "A16/D16", PMAP_VME16, VME16_BASE, VME16_MASK }, 73 { BUS_VME16D32, "A16/D32", PMAP_VME32, VME16_BASE, VME16_MASK }, 74 { BUS_VME24D16, "A24/D16", PMAP_VME16, VME24_BASE, VME24_MASK }, 75 { BUS_VME24D32, "A24/D32", PMAP_VME32, VME24_BASE, VME24_MASK }, 76 { BUS_VME32D16, "A32/D16", PMAP_VME16, VME32_BASE, VME32_MASK }, 77 { BUS_VME32D32, "A32/D32", PMAP_VME32, VME32_BASE, VME32_MASK }, 78 }; 79 80 static int vme_match(struct device *, struct cfdata *, void *); 81 static void vme_attach(struct device *, struct device *, void *); 82 83 struct vme_softc { 84 struct device sc_dev; 85 bus_space_tag_t sc_bustag; 86 bus_dma_tag_t sc_dmatag; 87 int sc_bustype; 88 }; 89 90 CFATTACH_DECL(vme, sizeof(struct vme_softc), 91 vme_match, vme_attach, NULL, NULL); 92 93 static int vme_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t, 94 int, vaddr_t, bus_space_handle_t *); 95 static paddr_t vme_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, 96 off_t, int, int); 97 static int vme_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 98 struct proc *, int); 99 100 static struct sun68k_bus_space_tag vme_space_tag = { 101 NULL, /* cookie */ 102 NULL, /* parent bus space tag */ 103 vme_bus_map, /* bus_space_map */ 104 NULL, /* bus_space_unmap */ 105 NULL, /* bus_space_subregion */ 106 NULL, /* bus_space_barrier */ 107 vme_bus_mmap, /* bus_space_mmap */ 108 NULL, /* bus_intr_establish */ 109 NULL, /* bus_space_peek_N */ 110 NULL /* bus_space_poke_N */ 111 }; 112 113 static struct sun68k_bus_dma_tag vme_dma_tag; 114 115 static int 116 vme_match(struct device *parent, struct cfdata *cf, void *aux) 117 { 118 struct confargs *ca = aux; 119 int unit; 120 121 if (cpu_has_vme == 0) 122 return (0); 123 124 unit = cf->cf_unit; 125 if (unit >= VME_UNITS) 126 return (0); 127 128 if (ca->ca_bustype != vme_info[unit].bustype) 129 return (0); 130 131 return (1); 132 } 133 134 static void 135 vme_attach(struct device *parent, struct device *self, void *args) 136 { 137 struct confargs *ca = aux; 138 struct vme_softc *sc = (void *)self; 139 struct confargs vmea; 140 int unit; 141 142 unit = device_unit(self); 143 printf(": (%s)\n", vme_info[unit].name); 144 145 sc->sc_bustag = ca->ca_bustag; 146 sc->sc_dmatag = ca->ca_dmatag; 147 sc->sc_bustype = unit; 148 149 vme_space_tag.cookie = sc; 150 vme_space_tag.parent = sc->sc_bustag; 151 152 vme_dma_tag = *sc->sc_dmatag; 153 vme_dma_tag._cookie = sc; 154 vme_dma_tag._dmamap_load = vme_dmamap_load; 155 156 vmea = *ca; 157 vmea.ca_bustag = &vme_space_tag; 158 vmea.ca_dmatag = &vme_dma_tag; 159 160 /* We know ca_bustype == BUS_VMExx */ 161 config_search_ia(bus_scan, self, "vme", args); 162 } 163 164 int 165 vme_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, 166 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp) 167 { 168 struct vme_softc *sc = t->cookie; 169 paddr_t pa; 170 int bustype, pmtype; 171 172 bustype = sc->sc_bustype; 173 pa = paddr; 174 pa &= vme_info[bustype].mask; 175 pa |= vme_info[bustype].base; 176 pmtype = vme_info[bustype].pmtype; 177 178 return bus_space_map2(sc->sc_bustag, pmtype, pa, size, 179 flags | _SUN68K_BUS_MAP_USE_PROM, vaddr, hp); 180 } 181 182 paddr_t 183 vme_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off, 184 int prot, int flags) 185 { 186 struct vme_softc *sc = t->cookie; 187 paddr_t pa; 188 int bustype, pmtype; 189 190 bustype = sc->sc_bustype; 191 pa = paddr; 192 pa &= vme_info[bustype].mask; 193 pa |= vme_info[bustype].base; 194 pmtype = vme_info[bustype].pmtype; 195 196 return bus_space_mmap2(sc->sc_bustag, pmtype, pa, off, prot, flags); 197 } 198 199 static int 200 vme_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 201 bus_size_t buflen, struct proc *p, int flags) 202 { 203 int error; 204 205 error = _bus_dmamap_load(t, map, buf, buflen, p, flags); 206 if (error == 0) 207 map->dm_segs[0].ds_addr &= DVMA_VME_SLAVE_MASK; 208 return error; 209 } 210
Indexes created Wed Sep 24 14:09:57 GMT 2025