vsbus.c revision 1.24
1 /* $NetBSD: vsbus.c,v 1.24 2000/04/23 16:38:54 matt Exp $ */ 2 /* 3 * Copyright (c) 1996, 1999 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 #include <vm/vm.h> 51 52 #define _VAX_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 #include <machine/pte.h> 55 #include <machine/sid.h> 56 #include <machine/scb.h> 57 #include <machine/cpu.h> 58 #include <machine/trap.h> 59 #include <machine/nexus.h> 60 61 #include <machine/uvax.h> 62 #include <machine/ka410.h> 63 #include <machine/ka420.h> 64 #include <machine/ka43.h> 65 66 #include <machine/vsbus.h> 67 68 #include "ioconf.h" 69 #include "opt_vax46.h" 70 #include "opt_vax48.h" 71 #include "opt_vax49.h" 72 73 int vsbus_match __P((struct device *, struct cfdata *, void *)); 74 void vsbus_attach __P((struct device *, struct device *, void *)); 75 int vsbus_print __P((void *, const char *)); 76 int vsbus_search __P((struct device *, struct cfdata *, void *)); 77 78 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 79 0, 80 0, 81 0, 82 0, 83 0, 84 0, 85 _bus_dmamap_create, 86 _bus_dmamap_destroy, 87 _bus_dmamap_load, 88 _bus_dmamap_load_mbuf, 89 _bus_dmamap_load_uio, 90 _bus_dmamap_load_raw, 91 _bus_dmamap_unload, 92 _bus_dmamap_sync, 93 _bus_dmamem_alloc, 94 _bus_dmamem_free, 95 _bus_dmamem_map, 96 _bus_dmamem_unmap, 97 _bus_dmamem_mmap, 98 }; 99 100 extern struct vax_bus_space vax_mem_bus_space; 101 102 struct cfattach vsbus_ca = { 103 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 104 }; 105 106 int 107 vsbus_print(aux, name) 108 void *aux; 109 const char *name; 110 { 111 struct vsbus_attach_args *va = aux; 112 113 printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 114 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 115 return(UNCONF); 116 } 117 118 int 119 vsbus_match(parent, cf, aux) 120 struct device *parent; 121 struct cfdata *cf; 122 void *aux; 123 { 124 if (vax_bustype == VAX_VSBUS) 125 return 1; 126 return 0; 127 } 128 129 void 130 vsbus_attach(parent, self, aux) 131 struct device *parent, *self; 132 void *aux; 133 { 134 struct vsbus_softc *sc = (void *)self; 135 136 printf("\n"); 137 138 sc->sc_dmatag = vsbus_bus_dma_tag; 139 140 switch (vax_boardtype) { 141 #if VAX49 142 case VAX_BTYP_49: 143 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 144 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 145 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 146 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 147 vsbus_dma_init(sc, 8192); 148 break; 149 #endif 150 151 #if VAX46 || VAX48 152 case VAX_BTYP_48: 153 case VAX_BTYP_46: 154 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 155 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 156 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 157 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 158 vsbus_dma_init(sc, 32768); 159 #endif 160 161 default: 162 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 163 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 164 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 165 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 166 break; 167 } 168 169 /* 170 * First: find which interrupts we won't care about. 171 * There are interrupts that interrupt on a periodic basic 172 * that we don't want to interfere with the rest of the 173 * interrupt probing. 174 */ 175 *sc->sc_intmsk = 0; 176 *sc->sc_intclr = 0xff; 177 DELAY(1000000); /* Wait a second */ 178 sc->sc_mask = *sc->sc_intreq; 179 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 180 /* 181 * now check for all possible devices on this "bus" 182 */ 183 config_search(vsbus_search, self, NULL); 184 185 /* Autoconfig finished, enable interrupts */ 186 *sc->sc_intmsk = ~sc->sc_mask; 187 } 188 189 int 190 vsbus_search(parent, cf, aux) 191 struct device *parent; 192 struct cfdata *cf; 193 void *aux; 194 { 195 struct vsbus_softc *sc = (void *)parent; 196 struct vsbus_attach_args va; 197 int i, vec, br; 198 u_char c; 199 200 va.va_paddr = cf->cf_loc[0]; 201 va.va_addr = vax_map_physmem(va.va_paddr, 1); 202 va.va_dmat = &sc->sc_dmatag; 203 va.va_iot = &vax_mem_bus_space; 204 205 *sc->sc_intmsk = 0; 206 *sc->sc_intclr = 0xff; 207 scb_vecref(0, 0); /* Clear vector ref */ 208 209 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 210 vax_unmap_physmem(va.va_addr, 1); 211 c = *sc->sc_intreq & ~sc->sc_mask; 212 if (i == 0) 213 goto forgetit; 214 if (i > 10) 215 c = sc->sc_mask; /* Fooling interrupt */ 216 else if (c == 0) 217 goto forgetit; 218 219 *sc->sc_intmsk = c; 220 DELAY(100); 221 *sc->sc_intmsk = 0; 222 va.va_maskno = ffs((u_int)c); 223 i = scb_vecref(&vec, &br); 224 if (i == 0) 225 goto fail; 226 if (vec == 0) 227 goto fail; 228 229 va.va_br = br; 230 va.va_cvec = vec; 231 232 config_attach(parent, cf, &va, vsbus_print); 233 return 0; 234 235 fail: 236 printf("%s%d at %s csr %x %s\n", 237 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 238 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 239 forgetit: 240 return 0; 241 } 242 243 /* 244 * Sets a new interrupt mask. Returns the old one. 245 * Works like spl functions. 246 */ 247 unsigned char 248 vsbus_setmask(mask) 249 unsigned char mask; 250 { 251 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 252 unsigned char ch; 253 254 ch = *sc->sc_intmsk; 255 *sc->sc_intmsk = mask; 256 return ch; 257 } 258 259 /* 260 * Clears the interrupts in mask. 261 */ 262 void 263 vsbus_clrintr(mask) 264 unsigned char mask; 265 { 266 struct vsbus_softc *sc = vsbus_cd.cd_devs[0]; 267 268 *sc->sc_intclr = mask; 269 } 270 271 /* 272 * Copy data from/to a user process' space from the DMA area. 273 * Use the physical memory directly. 274 */ 275 void 276 vsbus_copytoproc(p, from, to, len) 277 struct proc *p; 278 caddr_t from, to; 279 int len; 280 { 281 struct pte *pte; 282 paddr_t pa; 283 284 pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb)); 285 if ((vaddr_t)to & PGOFSET) { 286 int cz = ROUND_PAGE(to) - (vaddr_t)to; 287 288 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 289 bcopy(from, (caddr_t)pa, min(cz, len)); 290 from += cz; 291 to += cz; 292 len -= cz; 293 pte += 8; /* XXX */ 294 } 295 while (len > 0) { 296 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 297 bcopy(from, (caddr_t)pa, min(NBPG, len)); 298 from += NBPG; 299 to += NBPG; 300 len -= NBPG; 301 pte += 8; /* XXX */ 302 } 303 } 304 305 void 306 vsbus_copyfromproc(p, from, to, len) 307 struct proc *p; 308 caddr_t from, to; 309 int len; 310 { 311 struct pte *pte; 312 paddr_t pa; 313 314 pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb)); 315 if ((vaddr_t)from & PGOFSET) { 316 int cz = ROUND_PAGE(from) - (vaddr_t)from; 317 318 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 319 bcopy((caddr_t)pa, to, min(cz, len)); 320 from += cz; 321 to += cz; 322 len -= cz; 323 pte += 8; /* XXX */ 324 } 325 while (len > 0) { 326 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 327 bcopy((caddr_t)pa, to, min(NBPG, len)); 328 from += NBPG; 329 to += NBPG; 330 len -= NBPG; 331 pte += 8; /* XXX */ 332 } 333 } 334
Indexes created Tue Sep 30 10:09:55 GMT 2025