vsbus.c revision 1.30
1 /* $NetBSD: vsbus.c,v 1.30 2000/11/21 05:49:08 chs 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 <uvm/uvm_extern.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_cputype.h" 70 71 int vsbus_match(struct device *, struct cfdata *, void *); 72 void vsbus_attach(struct device *, struct device *, void *); 73 int vsbus_print(void *, const char *); 74 int vsbus_search(struct device *, struct cfdata *, void *); 75 76 static 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 extern struct vax_bus_space vax_mem_bus_space; 99 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 100 101 struct cfattach vsbus_ca = { 102 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 103 }; 104 105 int 106 vsbus_print(aux, name) 107 void *aux; 108 const char *name; 109 { 110 struct vsbus_attach_args *va = aux; 111 112 printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 113 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 114 return(UNCONF); 115 } 116 117 int 118 vsbus_match(parent, cf, aux) 119 struct device *parent; 120 struct cfdata *cf; 121 void *aux; 122 { 123 if (vax_bustype == VAX_VSBUS) 124 return 1; 125 return 0; 126 } 127 128 void 129 vsbus_attach(parent, self, aux) 130 struct device *parent, *self; 131 void *aux; 132 { 133 struct vsbus_softc *sc = (void *)self; 134 int dbase, dsize; 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 if (vax_boardtype == VAX_BTYP_410) { 167 dbase = KA410_DMA_BASE; 168 dsize = KA410_DMA_SIZE; 169 } else { 170 dbase = KA420_DMA_BASE; 171 dsize = KA420_DMA_SIZE; 172 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 173 } 174 sc->sc_dmasize = dsize; 175 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 176 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 177 break; 178 } 179 180 SIMPLEQ_INIT(&vsbus_dma); 181 /* 182 * First: find which interrupts we won't care about. 183 * There are interrupts that interrupt on a periodic basic 184 * that we don't want to interfere with the rest of the 185 * interrupt probing. 186 */ 187 *sc->sc_intmsk = 0; 188 *sc->sc_intclr = 0xff; 189 DELAY(1000000); /* Wait a second */ 190 sc->sc_mask = *sc->sc_intreq; 191 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 192 /* 193 * now check for all possible devices on this "bus" 194 */ 195 config_search(vsbus_search, self, NULL); 196 197 /* Autoconfig finished, enable interrupts */ 198 *sc->sc_intmsk = ~sc->sc_mask; 199 } 200 201 int 202 vsbus_search(parent, cf, aux) 203 struct device *parent; 204 struct cfdata *cf; 205 void *aux; 206 { 207 struct vsbus_softc *sc = (void *)parent; 208 struct vsbus_attach_args va; 209 int i, vec, br; 210 u_char c; 211 212 va.va_paddr = cf->cf_loc[0]; 213 va.va_addr = vax_map_physmem(va.va_paddr, 1); 214 va.va_dmat = &sc->sc_dmatag; 215 va.va_iot = &vax_mem_bus_space; 216 217 *sc->sc_intmsk = 0; 218 *sc->sc_intclr = 0xff; 219 scb_vecref(0, 0); /* Clear vector ref */ 220 221 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 222 vax_unmap_physmem(va.va_addr, 1); 223 c = *sc->sc_intreq & ~sc->sc_mask; 224 if (i == 0) 225 goto forgetit; 226 if (i > 10) 227 c = sc->sc_mask; /* Fooling interrupt */ 228 else if (c == 0) 229 goto forgetit; 230 231 *sc->sc_intmsk = c; 232 DELAY(100); 233 *sc->sc_intmsk = 0; 234 va.va_maskno = ffs((u_int)c); 235 i = scb_vecref(&vec, &br); 236 if (i == 0) 237 goto fail; 238 if (vec == 0) 239 goto fail; 240 241 va.va_br = br; 242 va.va_cvec = vec; 243 va.va_dmaaddr = sc->sc_dmaaddr; 244 va.va_dmasize = sc->sc_dmasize; 245 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 246 config_attach(parent, cf, &va, vsbus_print); 247 *sc->sc_intmsk = 0; 248 return 0; 249 250 fail: 251 printf("%s%d at %s csr %x %s\n", 252 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 253 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 254 forgetit: 255 return 0; 256 } 257 258 /* 259 * Sets a new interrupt mask. Returns the old one. 260 * Works like spl functions. 261 */ 262 unsigned char 263 vsbus_setmask(mask) 264 unsigned char mask; 265 { 266 struct vsbus_softc *sc; 267 unsigned char ch; 268 269 if (vsbus_cd.cd_ndevs == 0) 270 return 0; 271 sc = vsbus_cd.cd_devs[0]; 272 273 ch = *sc->sc_intmsk; 274 *sc->sc_intmsk = mask; 275 return ch; 276 } 277 278 /* 279 * Clears the interrupts in mask. 280 */ 281 void 282 vsbus_clrintr(mask) 283 unsigned char mask; 284 { 285 struct vsbus_softc *sc; 286 287 if (vsbus_cd.cd_ndevs == 0) 288 return; 289 sc = vsbus_cd.cd_devs[0]; 290 291 *sc->sc_intclr = mask; 292 } 293 294 /* 295 * Copy data from/to a user process' space from the DMA area. 296 * Use the physical memory directly. 297 */ 298 void 299 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 300 { 301 struct pte *pte; 302 paddr_t pa; 303 304 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 305 bcopy(from, to, len); 306 return; 307 } 308 pte = uvtopte(trunc_page((vaddr_t)to), &p->p_addr->u_pcb); 309 if ((vaddr_t)to & PGOFSET) { 310 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 311 312 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 313 bcopy(from, (caddr_t)pa, min(cz, len)); 314 from += cz; 315 to += cz; 316 len -= cz; 317 pte += 8; /* XXX */ 318 } 319 while (len > 0) { 320 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 321 bcopy(from, (caddr_t)pa, min(NBPG, len)); 322 from += NBPG; 323 to += NBPG; 324 len -= NBPG; 325 pte += 8; /* XXX */ 326 } 327 } 328 329 void 330 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 331 { 332 struct pte *pte; 333 paddr_t pa; 334 335 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 336 bcopy(from, to, len); 337 return; 338 } 339 pte = uvtopte(trunc_page((vaddr_t)from), &p->p_addr->u_pcb); 340 if ((vaddr_t)from & PGOFSET) { 341 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 342 343 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 344 bcopy((caddr_t)pa, to, min(cz, len)); 345 from += cz; 346 to += cz; 347 len -= cz; 348 pte += 8; /* XXX */ 349 } 350 while (len > 0) { 351 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 352 bcopy((caddr_t)pa, to, min(NBPG, len)); 353 from += NBPG; 354 to += NBPG; 355 len -= NBPG; 356 pte += 8; /* XXX */ 357 } 358 } 359 360 /* 361 * There can only be one user of the DMA area on VS2k/VS3100 at one 362 * time, so keep track of it here. 363 */ 364 static int vsbus_active = 0; 365 366 void 367 vsbus_dma_start(struct vsbus_dma *vd) 368 { 369 370 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 371 372 if (vsbus_active == 0) 373 vsbus_dma_intr(); 374 } 375 376 void 377 vsbus_dma_intr(void) 378 { 379 struct vsbus_dma *vd; 380 381 vd = SIMPLEQ_FIRST(&vsbus_dma); 382 if (vd == NULL) { 383 vsbus_active = 0; 384 return; 385 } 386 vsbus_active = 1; 387 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd, vd_q); 388 (*vd->vd_go)(vd->vd_arg); 389 } 390 391
Indexes created Tue Sep 30 20:09:53 GMT 2025