vsbus.c revision 1.17
1 /* $NetBSD: vsbus.c,v 1.17 1999/04/14 23:14:46 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 struct bp_conf *bp = aux; 127 128 if (strcmp(bp->type, "vsbus")) 129 return 0; 130 /* 131 * on machines which can have it, the vsbus is always there 132 */ 133 if ((vax_bustype & VAX_VSBUS) == 0) 134 return (0); 135 136 return (1); 137 } 138 139 void 140 vsbus_attach(parent, self, aux) 141 struct device *parent, *self; 142 void *aux; 143 { 144 struct vsbus_softc *sc = (void *)self; 145 146 printf("\n"); 147 148 sc->sc_cpu = (void *)vax_map_physmem(VS_REGS, 1); 149 150 /* 151 * First: find which interrupts we won't care about. 152 * There are interrupts that interrupt on a periodic basic 153 * that we don't want to interfere with the rest of the 154 * interrupt probing. 155 */ 156 sc->sc_cpu->vc_intmsk = 0; 157 sc->sc_cpu->vc_intclr = 0xff; 158 DELAY(1000000); /* Wait a second */ 159 sc->sc_mask = sc->sc_cpu->vc_intreq; 160 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 161 /* 162 * now check for all possible devices on this "bus" 163 */ 164 config_search(vsbus_search, self, NULL); 165 166 /* Autoconfig finished, enable interrupts */ 167 sc->sc_cpu->vc_intmsk = ~sc->sc_mask; 168 } 169 170 int 171 vsbus_search(parent, cf, aux) 172 struct device *parent; 173 struct cfdata *cf; 174 void *aux; 175 { 176 struct vsbus_softc *sc = (void *)parent; 177 struct vsbus_attach_args va; 178 int i, vec, br; 179 u_char c; 180 181 va.va_paddr = cf->cf_loc[0]; 182 va.va_addr = vax_map_physmem(va.va_paddr, 1); 183 va.va_dmat = &vsbus_bus_dma_tag; 184 185 sc->sc_cpu->vc_intmsk = 0; 186 sc->sc_cpu->vc_intclr = 0xff; 187 scb_vecref(0, 0); /* Clear vector ref */ 188 189 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 190 vax_unmap_physmem(va.va_addr, 1); 191 c = sc->sc_cpu->vc_intreq & ~sc->sc_mask; 192 if (i > 10) 193 c = sc->sc_mask; /* Fooling interrupt */ 194 if (c == 0 || i == 0) 195 goto forgetit; 196 197 sc->sc_cpu->vc_intmsk = c; 198 DELAY(100); 199 sc->sc_cpu->vc_intmsk = 0; 200 va.va_maskno = ffs((u_int)c); 201 i = scb_vecref(&vec, &br); 202 if (i == 0) 203 goto fail; 204 if (vec == 0) 205 goto fail; 206 207 scb_vecalloc(vec, va.va_ivec, cf->cf_unit, SCB_ISTACK); 208 va.va_br = br; 209 va.va_cvec = vec; 210 211 config_attach(parent, cf, &va, vsbus_print); 212 return 0; 213 214 fail: 215 printf("%s%d at %s csr %x %s\n", 216 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 217 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 218 forgetit: 219 return 0; 220 } 221 222 /* 223 * Sets a new interrupt mask. Returns the old one. 224 * Works like spl functions. 225 */ 226 unsigned char 227 vsbus_setmask(mask) 228 unsigned char mask; 229 { 230 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 231 unsigned char ch; 232 233 ch = sc->sc_cpu->vc_intmsk; 234 sc->sc_cpu->vc_intmsk = mask; 235 return ch; 236 } 237 238 /* 239 * Clears the interrupts in mask. 240 */ 241 void 242 vsbus_clrintr(mask) 243 unsigned char mask; 244 { 245 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 246 247 sc->sc_cpu->vc_intclr = mask; 248 } 249 250 #ifdef notyet 251 /* 252 * Allocate/free DMA pages and other bus resources. 253 * VS2000: All DMA and register access must be exclusive. 254 * VS3100: DMA area may be accessed by anyone anytime. 255 * MFM/SCSI: Don't touch reg's while DMA is active. 256 * SCSI/SCSI: Legal to touch any register anytime. 257 */ 258 259 260 #endif 261
Indexes created Tue Sep 30 06:09:59 GMT 2025