vsbus.c revision 1.18
1 /* $NetBSD: vsbus.c,v 1.18 1999/08/07 10:36:51 ragge Exp $ */ 2 /* 3 * Copyright (c) 1996 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Ludd by Bertram Barth. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed at Ludd, University of 19 * Lule}, Sweden and its contributors. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/buf.h> 38 #include <sys/conf.h> 39 #include <sys/file.h> 40 #include <sys/ioctl.h> 41 #include <sys/proc.h> 42 #include <sys/user.h> 43 #include <sys/map.h> 44 #include <sys/device.h> 45 #include <sys/dkstat.h> 46 #include <sys/disklabel.h> 47 #include <sys/syslog.h> 48 #include <sys/stat.h> 49 50 #define _VAX_BUS_DMA_PRIVATE 51 #include <machine/bus.h> 52 #include <machine/pte.h> 53 #include <machine/sid.h> 54 #include <machine/scb.h> 55 #include <machine/cpu.h> 56 #include <machine/trap.h> 57 #include <machine/nexus.h> 58 59 #include <machine/uvax.h> 60 #include <machine/ka410.h> 61 #include <machine/ka420.h> 62 #include <machine/ka43.h> 63 64 #include <machine/vsbus.h> 65 66 #include "ioconf.h" 67 68 int vsbus_match __P((struct device *, struct cfdata *, void *)); 69 void vsbus_attach __P((struct device *, struct device *, void *)); 70 int vsbus_print __P((void *, const char *)); 71 int vsbus_search __P((struct device *, struct cfdata *, void *)); 72 73 void ka410_attach __P((struct device *, struct device *, void *)); 74 void ka43_attach __P((struct device *, struct device *, void *)); 75 76 struct vax_bus_dma_tag vsbus_bus_dma_tag = { 77 0, 78 0, 79 0, 80 0, 81 0, 82 0, 83 _bus_dmamap_create, 84 _bus_dmamap_destroy, 85 _bus_dmamap_load, 86 _bus_dmamap_load_mbuf, 87 _bus_dmamap_load_uio, 88 _bus_dmamap_load_raw, 89 _bus_dmamap_unload, 90 _bus_dmamap_sync, 91 _bus_dmamem_alloc, 92 _bus_dmamem_free, 93 _bus_dmamem_map, 94 _bus_dmamem_unmap, 95 _bus_dmamem_mmap, 96 }; 97 98 struct vsbus_softc { 99 struct device sc_dev; 100 volatile struct vs_cpu *sc_cpu; 101 u_char sc_mask; /* Interrupts to enable after autoconf */ 102 }; 103 104 struct cfattach vsbus_ca = { 105 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 106 }; 107 108 int 109 vsbus_print(aux, name) 110 void *aux; 111 const char *name; 112 { 113 struct vsbus_attach_args *va = aux; 114 115 printf(" csr 0x%lx vec %o ipl %x maskbit %x", va->va_paddr, 116 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 117 return(UNCONF); 118 } 119 120 int 121 vsbus_match(parent, cf, aux) 122 struct device *parent; 123 struct cfdata *cf; 124 void *aux; 125 { 126 if (vax_bustype == VAX_VSBUS) 127 return 1; 128 return 0; 129 } 130 131 void 132 vsbus_attach(parent, self, aux) 133 struct device *parent, *self; 134 void *aux; 135 { 136 struct vsbus_softc *sc = (void *)self; 137 138 printf("\n"); 139 140 sc->sc_cpu = (void *)vax_map_physmem(VS_REGS, 1); 141 142 /* 143 * First: find which interrupts we won't care about. 144 * There are interrupts that interrupt on a periodic basic 145 * that we don't want to interfere with the rest of the 146 * interrupt probing. 147 */ 148 sc->sc_cpu->vc_intmsk = 0; 149 sc->sc_cpu->vc_intclr = 0xff; 150 DELAY(1000000); /* Wait a second */ 151 sc->sc_mask = sc->sc_cpu->vc_intreq; 152 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 153 /* 154 * now check for all possible devices on this "bus" 155 */ 156 config_search(vsbus_search, self, NULL); 157 158 /* Autoconfig finished, enable interrupts */ 159 sc->sc_cpu->vc_intmsk = ~sc->sc_mask; 160 } 161 162 int 163 vsbus_search(parent, cf, aux) 164 struct device *parent; 165 struct cfdata *cf; 166 void *aux; 167 { 168 struct vsbus_softc *sc = (void *)parent; 169 struct vsbus_attach_args va; 170 int i, vec, br; 171 u_char c; 172 173 va.va_paddr = cf->cf_loc[0]; 174 va.va_addr = vax_map_physmem(va.va_paddr, 1); 175 va.va_dmat = &vsbus_bus_dma_tag; 176 177 sc->sc_cpu->vc_intmsk = 0; 178 sc->sc_cpu->vc_intclr = 0xff; 179 scb_vecref(0, 0); /* Clear vector ref */ 180 181 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 182 vax_unmap_physmem(va.va_addr, 1); 183 c = sc->sc_cpu->vc_intreq & ~sc->sc_mask; 184 if (i > 10) 185 c = sc->sc_mask; /* Fooling interrupt */ 186 if (c == 0 || i == 0) 187 goto forgetit; 188 189 sc->sc_cpu->vc_intmsk = c; 190 DELAY(100); 191 sc->sc_cpu->vc_intmsk = 0; 192 va.va_maskno = ffs((u_int)c); 193 i = scb_vecref(&vec, &br); 194 if (i == 0) 195 goto fail; 196 if (vec == 0) 197 goto fail; 198 199 scb_vecalloc(vec, va.va_ivec, cf->cf_unit, SCB_ISTACK); 200 va.va_br = br; 201 va.va_cvec = vec; 202 203 config_attach(parent, cf, &va, vsbus_print); 204 return 0; 205 206 fail: 207 printf("%s%d at %s csr %x %s\n", 208 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 209 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 210 forgetit: 211 return 0; 212 } 213 214 /* 215 * Sets a new interrupt mask. Returns the old one. 216 * Works like spl functions. 217 */ 218 unsigned char 219 vsbus_setmask(mask) 220 unsigned char mask; 221 { 222 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 223 unsigned char ch; 224 225 ch = sc->sc_cpu->vc_intmsk; 226 sc->sc_cpu->vc_intmsk = mask; 227 return ch; 228 } 229 230 /* 231 * Clears the interrupts in mask. 232 */ 233 void 234 vsbus_clrintr(mask) 235 unsigned char mask; 236 { 237 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 238 239 sc->sc_cpu->vc_intclr = mask; 240 } 241 242 #ifdef notyet 243 /* 244 * Allocate/free DMA pages and other bus resources. 245 * VS2000: All DMA and register access must be exclusive. 246 * VS3100: DMA area may be accessed by anyone anytime. 247 * MFM/SCSI: Don't touch reg's while DMA is active. 248 * SCSI/SCSI: Legal to touch any register anytime. 249 */ 250 251 252 #endif 253
Indexes created Tue Sep 30 06:09:59 GMT 2025