vsbus.c revision 1.43
1 /* $NetBSD: vsbus.c,v 1.43 2003/06/18 08:58:42 drochner 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/disklabel.h> 45 #include <sys/syslog.h> 46 #include <sys/stat.h> 47 48 #include <uvm/uvm_extern.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 #include "opt_cputype.h" 68 69 int vsbus_match(struct device *, struct cfdata *, void *); 70 void vsbus_attach(struct device *, struct device *, void *); 71 int vsbus_print(void *, const char *); 72 int vsbus_search(struct device *, struct cfdata *, void *); 73 74 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 75 0, 76 0, 77 0, 78 0, 79 0, 80 0, 81 _bus_dmamap_create, 82 _bus_dmamap_destroy, 83 _bus_dmamap_load, 84 _bus_dmamap_load_mbuf, 85 _bus_dmamap_load_uio, 86 _bus_dmamap_load_raw, 87 _bus_dmamap_unload, 88 _bus_dmamap_sync, 89 _bus_dmamem_alloc, 90 _bus_dmamem_free, 91 _bus_dmamem_map, 92 _bus_dmamem_unmap, 93 _bus_dmamem_mmap, 94 }; 95 96 extern struct vax_bus_space vax_mem_bus_space; 97 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 98 99 CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc), 100 vsbus_match, vsbus_attach, NULL, NULL); 101 102 int 103 vsbus_print(aux, name) 104 void *aux; 105 const char *name; 106 { 107 struct vsbus_attach_args *va = aux; 108 109 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 110 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 111 return(UNCONF); 112 } 113 114 int 115 vsbus_match(parent, cf, aux) 116 struct device *parent; 117 struct cfdata *cf; 118 void *aux; 119 { 120 #if VAX53 || VAXANY 121 /* Kludge: VAX53 is... special */ 122 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 123 return 1; /* Hack */ 124 #endif 125 if (vax_bustype == VAX_VSBUS) 126 return 1; 127 return 0; 128 } 129 130 void 131 vsbus_attach(parent, self, aux) 132 struct device *parent, *self; 133 void *aux; 134 { 135 struct vsbus_softc *sc = (void *)self; 136 int dbase, dsize; 137 138 printf("\n"); 139 140 sc->sc_dmatag = vsbus_bus_dma_tag; 141 142 switch (vax_boardtype) { 143 #if VAX49 || VAX53 144 case VAX_BTYP_53: 145 case VAX_BTYP_49: 146 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 147 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 148 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 149 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 150 vsbus_dma_init(sc, 8192); 151 break; 152 #endif 153 154 #if VAX46 || VAX48 155 case VAX_BTYP_48: 156 case VAX_BTYP_46: 157 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 158 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 159 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 160 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 161 vsbus_dma_init(sc, 32768); 162 #endif 163 164 default: 165 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 166 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 167 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 168 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 169 if (vax_boardtype == VAX_BTYP_410) { 170 dbase = KA410_DMA_BASE; 171 dsize = KA410_DMA_SIZE; 172 } else { 173 dbase = KA420_DMA_BASE; 174 dsize = KA420_DMA_SIZE; 175 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 176 } 177 sc->sc_dmasize = dsize; 178 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 179 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 180 break; 181 } 182 183 SIMPLEQ_INIT(&vsbus_dma); 184 /* 185 * First: find which interrupts we won't care about. 186 * There are interrupts that interrupt on a periodic basic 187 * that we don't want to interfere with the rest of the 188 * interrupt probing. 189 */ 190 *sc->sc_intmsk = 0; 191 *sc->sc_intclr = 0xff; 192 DELAY(1000000); /* Wait a second */ 193 sc->sc_mask = *sc->sc_intreq; 194 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 195 /* 196 * now check for all possible devices on this "bus" 197 */ 198 config_search(vsbus_search, self, NULL); 199 200 /* Autoconfig finished, enable interrupts */ 201 *sc->sc_intmsk = ~sc->sc_mask; 202 } 203 204 int 205 vsbus_search(parent, cf, aux) 206 struct device *parent; 207 struct cfdata *cf; 208 void *aux; 209 { 210 struct vsbus_softc *sc = (void *)parent; 211 struct vsbus_attach_args va; 212 int i, vec, br; 213 u_char c; 214 215 va.va_paddr = cf->cf_loc[0]; 216 va.va_addr = vax_map_physmem(va.va_paddr, 1); 217 va.va_dmat = &sc->sc_dmatag; 218 va.va_iot = &vax_mem_bus_space; 219 220 *sc->sc_intmsk = 0; 221 *sc->sc_intclr = 0xff; 222 scb_vecref(0, 0); /* Clear vector ref */ 223 224 i = config_match(parent, cf, &va); 225 vax_unmap_physmem(va.va_addr, 1); 226 c = *sc->sc_intreq & ~sc->sc_mask; 227 if (i == 0) 228 goto forgetit; 229 if (i > 10) 230 c = sc->sc_mask; /* Fooling interrupt */ 231 else if (c == 0) 232 goto forgetit; 233 234 *sc->sc_intmsk = c; 235 DELAY(100); 236 *sc->sc_intmsk = 0; 237 va.va_maskno = ffs((u_int)c); 238 i = scb_vecref(&vec, &br); 239 if (i == 0) 240 goto fail; 241 if (vec == 0) 242 goto fail; 243 244 va.va_br = br; 245 va.va_cvec = vec; 246 va.va_dmaaddr = sc->sc_dmaaddr; 247 va.va_dmasize = sc->sc_dmasize; 248 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 249 config_attach(parent, cf, &va, vsbus_print); 250 *sc->sc_intmsk = 0; 251 return 0; 252 253 fail: 254 printf("%s%d at %s csr 0x%x %s\n", 255 cf->cf_name, cf->cf_unit, parent->dv_xname, 256 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 257 forgetit: 258 return 0; 259 } 260 261 /* 262 * Sets a new interrupt mask. Returns the old one. 263 * Works like spl functions. 264 */ 265 unsigned char 266 vsbus_setmask(mask) 267 unsigned char mask; 268 { 269 struct vsbus_softc *sc; 270 unsigned char ch; 271 272 if (vsbus_cd.cd_ndevs == 0) 273 return 0; 274 sc = vsbus_cd.cd_devs[0]; 275 276 ch = *sc->sc_intmsk; 277 *sc->sc_intmsk = mask; 278 return ch; 279 } 280 281 /* 282 * Clears the interrupts in mask. 283 */ 284 void 285 vsbus_clrintr(mask) 286 unsigned char mask; 287 { 288 struct vsbus_softc *sc; 289 290 if (vsbus_cd.cd_ndevs == 0) 291 return; 292 sc = vsbus_cd.cd_devs[0]; 293 294 *sc->sc_intclr = mask; 295 } 296 297 /* 298 * Copy data from/to a user process' space from the DMA area. 299 * Use the physical memory directly. 300 */ 301 void 302 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 303 { 304 struct pte *pte; 305 paddr_t pa; 306 307 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 308 bcopy(from, to, len); 309 return; 310 } 311 if ((long)to & 0x40000000) 312 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 313 else 314 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 315 if ((vaddr_t)to & PGOFSET) { 316 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 317 318 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 319 bcopy(from, (caddr_t)pa, 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(from, (caddr_t)pa, min(PAGE_SIZE, len)); 328 from += PAGE_SIZE; 329 to += PAGE_SIZE; 330 len -= PAGE_SIZE; 331 pte += 8; /* XXX */ 332 } 333 } 334 335 void 336 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 337 { 338 struct pte *pte; 339 paddr_t pa; 340 341 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 342 bcopy(from, to, len); 343 return; 344 } 345 if ((long)to & 0x40000000) 346 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 347 else 348 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 349 if ((vaddr_t)from & PGOFSET) { 350 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 351 352 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 353 bcopy((caddr_t)pa, to, min(cz, len)); 354 from += cz; 355 to += cz; 356 len -= cz; 357 pte += 8; /* XXX */ 358 } 359 while (len > 0) { 360 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 361 bcopy((caddr_t)pa, to, min(PAGE_SIZE, len)); 362 from += PAGE_SIZE; 363 to += PAGE_SIZE; 364 len -= PAGE_SIZE; 365 pte += 8; /* XXX */ 366 } 367 } 368 369 /* 370 * There can only be one user of the DMA area on VS2k/VS3100 at one 371 * time, so keep track of it here. 372 */ 373 static int vsbus_active = 0; 374 375 void 376 vsbus_dma_start(struct vsbus_dma *vd) 377 { 378 379 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 380 381 if (vsbus_active == 0) 382 vsbus_dma_intr(); 383 } 384 385 void 386 vsbus_dma_intr(void) 387 { 388 struct vsbus_dma *vd; 389 390 vd = SIMPLEQ_FIRST(&vsbus_dma); 391 if (vd == NULL) { 392 vsbus_active = 0; 393 return; 394 } 395 vsbus_active = 1; 396 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 397 (*vd->vd_go)(vd->vd_arg); 398 } 399 400
Indexes created Sun Oct 19 02:09:48 GMT 2025