vsbus.c revision 1.41
1 /* $NetBSD: vsbus.c,v 1.41 2003/01/18 07:10:35 thorpej 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/device.h> 44 #include <sys/dkstat.h> 45 #include <sys/disklabel.h> 46 #include <sys/syslog.h> 47 #include <sys/stat.h> 48 49 #include <uvm/uvm_extern.h> 50 51 #define _VAX_BUS_DMA_PRIVATE 52 #include <machine/bus.h> 53 #include <machine/pte.h> 54 #include <machine/sid.h> 55 #include <machine/scb.h> 56 #include <machine/cpu.h> 57 #include <machine/trap.h> 58 #include <machine/nexus.h> 59 60 #include <machine/uvax.h> 61 #include <machine/ka410.h> 62 #include <machine/ka420.h> 63 #include <machine/ka43.h> 64 65 #include <machine/vsbus.h> 66 67 #include "ioconf.h" 68 #include "opt_cputype.h" 69 70 int vsbus_match(struct device *, struct cfdata *, void *); 71 void vsbus_attach(struct device *, struct device *, void *); 72 int vsbus_print(void *, const char *); 73 int vsbus_search(struct device *, struct cfdata *, void *); 74 75 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 76 0, 77 0, 78 0, 79 0, 80 0, 81 0, 82 _bus_dmamap_create, 83 _bus_dmamap_destroy, 84 _bus_dmamap_load, 85 _bus_dmamap_load_mbuf, 86 _bus_dmamap_load_uio, 87 _bus_dmamap_load_raw, 88 _bus_dmamap_unload, 89 _bus_dmamap_sync, 90 _bus_dmamem_alloc, 91 _bus_dmamem_free, 92 _bus_dmamem_map, 93 _bus_dmamem_unmap, 94 _bus_dmamem_mmap, 95 }; 96 97 extern struct vax_bus_space vax_mem_bus_space; 98 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 99 100 CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc), 101 vsbus_match, vsbus_attach, NULL, NULL); 102 103 int 104 vsbus_print(aux, name) 105 void *aux; 106 const char *name; 107 { 108 struct vsbus_attach_args *va = aux; 109 110 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 111 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 112 return(UNCONF); 113 } 114 115 int 116 vsbus_match(parent, cf, aux) 117 struct device *parent; 118 struct cfdata *cf; 119 void *aux; 120 { 121 #if VAX53 || VAXANY 122 /* Kludge: VAX53 is... special */ 123 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 124 return 1; /* Hack */ 125 #endif 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 int dbase, dsize; 138 139 printf("\n"); 140 141 sc->sc_dmatag = vsbus_bus_dma_tag; 142 143 switch (vax_boardtype) { 144 #if VAX49 || VAX53 145 case VAX_BTYP_53: 146 case VAX_BTYP_49: 147 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 148 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 149 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 150 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 151 vsbus_dma_init(sc, 8192); 152 break; 153 #endif 154 155 #if VAX46 || VAX48 156 case VAX_BTYP_48: 157 case VAX_BTYP_46: 158 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 159 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 160 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 161 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 162 vsbus_dma_init(sc, 32768); 163 #endif 164 165 default: 166 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 167 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 168 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 169 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 170 if (vax_boardtype == VAX_BTYP_410) { 171 dbase = KA410_DMA_BASE; 172 dsize = KA410_DMA_SIZE; 173 } else { 174 dbase = KA420_DMA_BASE; 175 dsize = KA420_DMA_SIZE; 176 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 177 } 178 sc->sc_dmasize = dsize; 179 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 180 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 181 break; 182 } 183 184 SIMPLEQ_INIT(&vsbus_dma); 185 /* 186 * First: find which interrupts we won't care about. 187 * There are interrupts that interrupt on a periodic basic 188 * that we don't want to interfere with the rest of the 189 * interrupt probing. 190 */ 191 *sc->sc_intmsk = 0; 192 *sc->sc_intclr = 0xff; 193 DELAY(1000000); /* Wait a second */ 194 sc->sc_mask = *sc->sc_intreq; 195 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 196 /* 197 * now check for all possible devices on this "bus" 198 */ 199 config_search(vsbus_search, self, NULL); 200 201 /* Autoconfig finished, enable interrupts */ 202 *sc->sc_intmsk = ~sc->sc_mask; 203 } 204 205 int 206 vsbus_search(parent, cf, aux) 207 struct device *parent; 208 struct cfdata *cf; 209 void *aux; 210 { 211 struct vsbus_softc *sc = (void *)parent; 212 struct vsbus_attach_args va; 213 int i, vec, br; 214 u_char c; 215 216 va.va_paddr = cf->cf_loc[0]; 217 va.va_addr = vax_map_physmem(va.va_paddr, 1); 218 va.va_dmat = &sc->sc_dmatag; 219 va.va_iot = &vax_mem_bus_space; 220 221 *sc->sc_intmsk = 0; 222 *sc->sc_intclr = 0xff; 223 scb_vecref(0, 0); /* Clear vector ref */ 224 225 i = config_match(parent, cf, &va); 226 vax_unmap_physmem(va.va_addr, 1); 227 c = *sc->sc_intreq & ~sc->sc_mask; 228 if (i == 0) 229 goto forgetit; 230 if (i > 10) 231 c = sc->sc_mask; /* Fooling interrupt */ 232 else if (c == 0) 233 goto forgetit; 234 235 *sc->sc_intmsk = c; 236 DELAY(100); 237 *sc->sc_intmsk = 0; 238 va.va_maskno = ffs((u_int)c); 239 i = scb_vecref(&vec, &br); 240 if (i == 0) 241 goto fail; 242 if (vec == 0) 243 goto fail; 244 245 va.va_br = br; 246 va.va_cvec = vec; 247 va.va_dmaaddr = sc->sc_dmaaddr; 248 va.va_dmasize = sc->sc_dmasize; 249 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 250 config_attach(parent, cf, &va, vsbus_print); 251 *sc->sc_intmsk = 0; 252 return 0; 253 254 fail: 255 printf("%s%d at %s csr 0x%x %s\n", 256 cf->cf_name, cf->cf_unit, parent->dv_xname, 257 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 258 forgetit: 259 return 0; 260 } 261 262 /* 263 * Sets a new interrupt mask. Returns the old one. 264 * Works like spl functions. 265 */ 266 unsigned char 267 vsbus_setmask(mask) 268 unsigned char mask; 269 { 270 struct vsbus_softc *sc; 271 unsigned char ch; 272 273 if (vsbus_cd.cd_ndevs == 0) 274 return 0; 275 sc = vsbus_cd.cd_devs[0]; 276 277 ch = *sc->sc_intmsk; 278 *sc->sc_intmsk = mask; 279 return ch; 280 } 281 282 /* 283 * Clears the interrupts in mask. 284 */ 285 void 286 vsbus_clrintr(mask) 287 unsigned char mask; 288 { 289 struct vsbus_softc *sc; 290 291 if (vsbus_cd.cd_ndevs == 0) 292 return; 293 sc = vsbus_cd.cd_devs[0]; 294 295 *sc->sc_intclr = mask; 296 } 297 298 /* 299 * Copy data from/to a user process' space from the DMA area. 300 * Use the physical memory directly. 301 */ 302 void 303 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 304 { 305 struct pte *pte; 306 paddr_t pa; 307 308 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 309 bcopy(from, to, len); 310 return; 311 } 312 if ((long)to & 0x40000000) 313 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 314 else 315 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 316 if ((vaddr_t)to & PGOFSET) { 317 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 318 319 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 320 bcopy(from, (caddr_t)pa, min(cz, len)); 321 from += cz; 322 to += cz; 323 len -= cz; 324 pte += 8; /* XXX */ 325 } 326 while (len > 0) { 327 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 328 bcopy(from, (caddr_t)pa, min(NBPG, len)); 329 from += NBPG; 330 to += NBPG; 331 len -= NBPG; 332 pte += 8; /* XXX */ 333 } 334 } 335 336 void 337 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 338 { 339 struct pte *pte; 340 paddr_t pa; 341 342 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 343 bcopy(from, to, len); 344 return; 345 } 346 if ((long)to & 0x40000000) 347 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 348 else 349 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 350 if ((vaddr_t)from & PGOFSET) { 351 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 352 353 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 354 bcopy((caddr_t)pa, to, min(cz, len)); 355 from += cz; 356 to += cz; 357 len -= cz; 358 pte += 8; /* XXX */ 359 } 360 while (len > 0) { 361 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 362 bcopy((caddr_t)pa, to, min(NBPG, len)); 363 from += NBPG; 364 to += NBPG; 365 len -= NBPG; 366 pte += 8; /* XXX */ 367 } 368 } 369 370 /* 371 * There can only be one user of the DMA area on VS2k/VS3100 at one 372 * time, so keep track of it here. 373 */ 374 static int vsbus_active = 0; 375 376 void 377 vsbus_dma_start(struct vsbus_dma *vd) 378 { 379 380 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 381 382 if (vsbus_active == 0) 383 vsbus_dma_intr(); 384 } 385 386 void 387 vsbus_dma_intr(void) 388 { 389 struct vsbus_dma *vd; 390 391 vd = SIMPLEQ_FIRST(&vsbus_dma); 392 if (vd == NULL) { 393 vsbus_active = 0; 394 return; 395 } 396 vsbus_active = 1; 397 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 398 (*vd->vd_go)(vd->vd_arg); 399 } 400 401
Indexes created Tue Sep 30 11:09:46 GMT 2025