1 /*- 2 * Copyright (C) 1996 Wolfgang Solfrank. 3 * Copyright (C) 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $NetBSD: ofw_machdep.c,v 1.5 2000/05/23 13:25:43 tsubai Exp $ 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_platform.h" 38 #include <sys/param.h> 39 #include <sys/bus.h> 40 #include <sys/systm.h> 41 #include <sys/conf.h> 42 #include <sys/disk.h> 43 #include <sys/fcntl.h> 44 #include <sys/malloc.h> 45 #include <sys/smp.h> 46 #include <sys/stat.h> 47 #include <sys/endian.h> 48 49 #include <net/ethernet.h> 50 51 #include <dev/fdt/fdt_common.h> 52 #include <dev/ofw/openfirm.h> 53 #include <dev/ofw/ofw_pci.h> 54 #include <dev/ofw/ofw_bus.h> 55 #include <dev/ofw/ofw_subr.h> 56 57 #include <vm/vm.h> 58 #include <vm/vm_param.h> 59 #include <vm/vm_page.h> 60 61 #include <machine/bus.h> 62 #include <machine/cpu.h> 63 #include <machine/md_var.h> 64 #include <machine/platform.h> 65 #include <machine/ofw_machdep.h> 66 #include <machine/trap.h> 67 68 static void *fdt; 69 int ofw_real_mode; 70 71 #ifdef AIM 72 extern register_t ofmsr[5]; 73 extern void *openfirmware_entry; 74 char save_trap_init[0x2f00]; /* EXC_LAST */ 75 char save_trap_of[0x2f00]; /* EXC_LAST */ 76 77 int ofwcall(void *); 78 static int openfirmware(void *args); 79 80 __inline void 81 ofw_save_trap_vec(char *save_trap_vec) 82 { 83 if (!ofw_real_mode) 84 return; 85 86 bcopy((void *)EXC_RST, save_trap_vec, EXC_LAST - EXC_RST); 87 } 88 89 static __inline void 90 ofw_restore_trap_vec(char *restore_trap_vec) 91 { 92 if (!ofw_real_mode) 93 return; 94 95 bcopy(restore_trap_vec, (void *)EXC_RST, EXC_LAST - EXC_RST); 96 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 97 } 98 99 /* 100 * Saved SPRG0-3 from OpenFirmware. Will be restored prior to the callback. 101 */ 102 register_t ofw_sprg0_save; 103 104 static __inline void 105 ofw_sprg_prepare(void) 106 { 107 if (ofw_real_mode) 108 return; 109 110 /* 111 * Assume that interrupt are disabled at this point, or 112 * SPRG1-3 could be trashed 113 */ 114 #ifdef __powerpc64__ 115 __asm __volatile("mtsprg1 %0\n\t" 116 "mtsprg2 %1\n\t" 117 "mtsprg3 %2\n\t" 118 : 119 : "r"(ofmsr[2]), 120 "r"(ofmsr[3]), 121 "r"(ofmsr[4])); 122 #else 123 __asm __volatile("mfsprg0 %0\n\t" 124 "mtsprg0 %1\n\t" 125 "mtsprg1 %2\n\t" 126 "mtsprg2 %3\n\t" 127 "mtsprg3 %4\n\t" 128 : "=&r"(ofw_sprg0_save) 129 : "r"(ofmsr[1]), 130 "r"(ofmsr[2]), 131 "r"(ofmsr[3]), 132 "r"(ofmsr[4])); 133 #endif 134 } 135 136 static __inline void 137 ofw_sprg_restore(void) 138 { 139 if (ofw_real_mode) 140 return; 141 142 /* 143 * Note that SPRG1-3 contents are irrelevant. They are scratch 144 * registers used in the early portion of trap handling when 145 * interrupts are disabled. 146 * 147 * PCPU data cannot be used until this routine is called ! 148 */ 149 #ifndef __powerpc64__ 150 __asm __volatile("mtsprg0 %0" :: "r"(ofw_sprg0_save)); 151 #endif 152 } 153 #endif 154 155 static int 156 parse_ofw_memory(phandle_t node, const char *prop, struct mem_region *output) 157 { 158 cell_t address_cells, size_cells; 159 cell_t OFmem[4 * PHYS_AVAIL_SZ]; 160 int sz, i, j; 161 phandle_t phandle; 162 163 sz = 0; 164 165 /* 166 * Get #address-cells from root node, defaulting to 1 if it cannot 167 * be found. 168 */ 169 phandle = OF_finddevice("/"); 170 if (OF_getencprop(phandle, "#address-cells", &address_cells, 171 sizeof(address_cells)) < (ssize_t)sizeof(address_cells)) 172 address_cells = 1; 173 if (OF_getencprop(phandle, "#size-cells", &size_cells, 174 sizeof(size_cells)) < (ssize_t)sizeof(size_cells)) 175 size_cells = 1; 176 177 /* 178 * Get memory. 179 */ 180 if (node == -1 || (sz = OF_getencprop(node, prop, 181 OFmem, sizeof(OFmem))) <= 0) 182 panic("Physical memory map not found"); 183 184 i = 0; 185 j = 0; 186 while (i < sz/sizeof(cell_t)) { 187 #if !defined(__powerpc64__) && !defined(BOOKE) 188 /* On 32-bit PPC (OEA), ignore regions starting above 4 GB */ 189 if (address_cells > 1 && OFmem[i] > 0) { 190 i += address_cells + size_cells; 191 continue; 192 } 193 #endif 194 195 output[j].mr_start = OFmem[i++]; 196 if (address_cells == 2) { 197 output[j].mr_start <<= 32; 198 output[j].mr_start += OFmem[i++]; 199 } 200 201 output[j].mr_size = OFmem[i++]; 202 if (size_cells == 2) { 203 output[j].mr_size <<= 32; 204 output[j].mr_size += OFmem[i++]; 205 } 206 207 #if !defined(__powerpc64__) && !defined(BOOKE) 208 /* Book-E can support 36-bit addresses. */ 209 /* 210 * Check for memory regions extending above 32-bit 211 * memory space, and restrict them to stay there. 212 */ 213 if (((uint64_t)output[j].mr_start + 214 (uint64_t)output[j].mr_size) > 215 BUS_SPACE_MAXADDR_32BIT) { 216 output[j].mr_size = BUS_SPACE_MAXADDR_32BIT - 217 output[j].mr_start; 218 } 219 #endif 220 221 j++; 222 } 223 sz = j*sizeof(output[0]); 224 225 return (sz); 226 } 227 228 static int 229 excise_fdt_reserved(struct mem_region *avail, int asz) 230 { 231 struct { 232 uint64_t address; 233 uint64_t size; 234 } fdtmap[16]; 235 ssize_t fdtmapsize; 236 phandle_t chosen; 237 int i, j, k; 238 239 chosen = OF_finddevice("/chosen"); 240 fdtmapsize = OF_getprop(chosen, "fdtmemreserv", fdtmap, sizeof(fdtmap)); 241 242 for (j = 0; j < fdtmapsize/sizeof(fdtmap[0]); j++) { 243 fdtmap[j].address = be64toh(fdtmap[j].address); 244 fdtmap[j].size = be64toh(fdtmap[j].size); 245 } 246 247 for (i = 0; i < asz; i++) { 248 for (j = 0; j < fdtmapsize/sizeof(fdtmap[0]); j++) { 249 /* 250 * Case 1: Exclusion region encloses complete 251 * available entry. Drop it and move on. 252 */ 253 if (fdtmap[j].address <= avail[i].mr_start && 254 fdtmap[j].address + fdtmap[j].size >= 255 avail[i].mr_start + avail[i].mr_size) { 256 for (k = i+1; k < asz; k++) 257 avail[k-1] = avail[k]; 258 asz--; 259 i--; /* Repeat some entries */ 260 continue; 261 } 262 263 /* 264 * Case 2: Exclusion region starts in available entry. 265 * Trim it to where the entry begins and append 266 * a new available entry with the region after 267 * the excluded region, if any. 268 */ 269 if (fdtmap[j].address >= avail[i].mr_start && 270 fdtmap[j].address < avail[i].mr_start + 271 avail[i].mr_size) { 272 if (fdtmap[j].address + fdtmap[j].size < 273 avail[i].mr_start + avail[i].mr_size) { 274 avail[asz].mr_start = 275 fdtmap[j].address + fdtmap[j].size; 276 avail[asz].mr_size = avail[i].mr_start + 277 avail[i].mr_size - 278 avail[asz].mr_start; 279 asz++; 280 } 281 282 avail[i].mr_size = fdtmap[j].address - 283 avail[i].mr_start; 284 } 285 286 /* 287 * Case 3: Exclusion region ends in available entry. 288 * Move start point to where the exclusion zone ends. 289 * The case of a contained exclusion zone has already 290 * been caught in case 2. 291 */ 292 if (fdtmap[j].address + fdtmap[j].size >= 293 avail[i].mr_start && fdtmap[j].address + 294 fdtmap[j].size < avail[i].mr_start + 295 avail[i].mr_size) { 296 avail[i].mr_size += avail[i].mr_start; 297 avail[i].mr_start = 298 fdtmap[j].address + fdtmap[j].size; 299 avail[i].mr_size -= avail[i].mr_start; 300 } 301 } 302 } 303 304 return (asz); 305 } 306 307 /* 308 * This is called during powerpc_init, before the system is really initialized. 309 * It shall provide the total and the available regions of RAM. 310 * The available regions need not take the kernel into account. 311 */ 312 void 313 ofw_mem_regions(struct mem_region *memp, int *memsz, 314 struct mem_region *availp, int *availsz) 315 { 316 phandle_t phandle; 317 int asz, msz; 318 int res; 319 char name[31]; 320 321 asz = msz = 0; 322 323 /* 324 * Get memory from all the /memory nodes. 325 */ 326 for (phandle = OF_child(OF_peer(0)); phandle != 0; 327 phandle = OF_peer(phandle)) { 328 if (OF_getprop(phandle, "name", name, sizeof(name)) <= 0) 329 continue; 330 if (strncmp(name, "memory", sizeof(name)) != 0 && 331 strncmp(name, "memory@", strlen("memory@")) != 0) 332 continue; 333 334 res = parse_ofw_memory(phandle, "reg", &memp[msz]); 335 msz += res/sizeof(struct mem_region); 336 if (OF_getproplen(phandle, "available") >= 0) 337 res = parse_ofw_memory(phandle, "available", 338 &availp[asz]); 339 else 340 res = parse_ofw_memory(phandle, "reg", &availp[asz]); 341 asz += res/sizeof(struct mem_region); 342 } 343 344 phandle = OF_finddevice("/chosen"); 345 if (OF_hasprop(phandle, "fdtmemreserv")) 346 asz = excise_fdt_reserved(availp, asz); 347 348 *memsz = msz; 349 *availsz = asz; 350 } 351 352 void 353 OF_initial_setup(void *fdt_ptr, void *junk, int (*openfirm)(void *)) 354 { 355 #ifdef AIM 356 ofmsr[0] = mfmsr(); 357 #ifdef __powerpc64__ 358 ofmsr[0] &= ~PSL_SF; 359 #else 360 __asm __volatile("mfsprg0 %0" : "=&r"(ofmsr[1])); 361 #endif 362 __asm __volatile("mfsprg1 %0" : "=&r"(ofmsr[2])); 363 __asm __volatile("mfsprg2 %0" : "=&r"(ofmsr[3])); 364 __asm __volatile("mfsprg3 %0" : "=&r"(ofmsr[4])); 365 openfirmware_entry = openfirm; 366 367 if (ofmsr[0] & PSL_DR) 368 ofw_real_mode = 0; 369 else 370 ofw_real_mode = 1; 371 372 ofw_save_trap_vec(save_trap_init); 373 #else 374 ofw_real_mode = 1; 375 #endif 376 377 fdt = fdt_ptr; 378 379 #ifdef FDT_DTB_STATIC 380 /* Check for a statically included blob */ 381 if (fdt == NULL) 382 fdt = &fdt_static_dtb; 383 #endif 384 } 385 386 boolean_t 387 OF_bootstrap() 388 { 389 boolean_t status = FALSE; 390 391 #ifdef AIM 392 if (openfirmware_entry != NULL) { 393 if (ofw_real_mode) { 394 status = OF_install(OFW_STD_REAL, 0); 395 } else { 396 #ifdef __powerpc64__ 397 status = OF_install(OFW_STD_32BIT, 0); 398 #else 399 status = OF_install(OFW_STD_DIRECT, 0); 400 #endif 401 } 402 403 if (status != TRUE) 404 return status; 405 406 OF_init(openfirmware); 407 } else 408 #endif 409 if (fdt != NULL) { 410 status = OF_install(OFW_FDT, 0); 411 412 if (status != TRUE) 413 return status; 414 415 OF_init(fdt); 416 OF_interpret("perform-fixup", 0); 417 } 418 419 return (status); 420 } 421 422 #ifdef AIM 423 void 424 ofw_quiesce(void) 425 { 426 struct { 427 cell_t name; 428 cell_t nargs; 429 cell_t nreturns; 430 } args; 431 432 KASSERT(!pmap_bootstrapped, ("Cannot call ofw_quiesce after VM is up")); 433 434 args.name = (cell_t)(uintptr_t)"quiesce"; 435 args.nargs = 0; 436 args.nreturns = 0; 437 openfirmware(&args); 438 } 439 440 static int 441 openfirmware_core(void *args) 442 { 443 int result; 444 register_t oldmsr; 445 446 if (openfirmware_entry == NULL) 447 return (-1); 448 449 /* 450 * Turn off exceptions - we really don't want to end up 451 * anywhere unexpected with PCPU set to something strange 452 * or the stack pointer wrong. 453 */ 454 oldmsr = intr_disable(); 455 456 ofw_sprg_prepare(); 457 458 /* Save trap vectors */ 459 ofw_save_trap_vec(save_trap_of); 460 461 /* Restore initially saved trap vectors */ 462 ofw_restore_trap_vec(save_trap_init); 463 464 #if defined(AIM) && !defined(__powerpc64__) 465 /* 466 * Clear battable[] translations 467 */ 468 if (!(cpu_features & PPC_FEATURE_64)) 469 __asm __volatile("mtdbatu 2, %0\n" 470 "mtdbatu 3, %0" : : "r" (0)); 471 isync(); 472 #endif 473 474 result = ofwcall(args); 475 476 /* Restore trap vecotrs */ 477 ofw_restore_trap_vec(save_trap_of); 478 479 ofw_sprg_restore(); 480 481 intr_restore(oldmsr); 482 483 return (result); 484 } 485 486 #ifdef SMP 487 struct ofw_rv_args { 488 void *args; 489 int retval; 490 volatile int in_progress; 491 }; 492 493 static void 494 ofw_rendezvous_dispatch(void *xargs) 495 { 496 struct ofw_rv_args *rv_args = xargs; 497 498 /* NOTE: Interrupts are disabled here */ 499 500 if (PCPU_GET(cpuid) == 0) { 501 /* 502 * Execute all OF calls on CPU 0 503 */ 504 rv_args->retval = openfirmware_core(rv_args->args); 505 rv_args->in_progress = 0; 506 } else { 507 /* 508 * Spin with interrupts off on other CPUs while OF has 509 * control of the machine. 510 */ 511 while (rv_args->in_progress) 512 cpu_spinwait(); 513 } 514 } 515 #endif 516 517 static int 518 openfirmware(void *args) 519 { 520 int result; 521 #ifdef SMP 522 struct ofw_rv_args rv_args; 523 #endif 524 525 if (openfirmware_entry == NULL) 526 return (-1); 527 528 #ifdef SMP 529 rv_args.args = args; 530 rv_args.in_progress = 1; 531 smp_rendezvous(smp_no_rendezvous_barrier, ofw_rendezvous_dispatch, 532 smp_no_rendezvous_barrier, &rv_args); 533 result = rv_args.retval; 534 #else 535 result = openfirmware_core(args); 536 #endif 537 538 return (result); 539 } 540 541 void 542 OF_reboot() 543 { 544 struct { 545 cell_t name; 546 cell_t nargs; 547 cell_t nreturns; 548 cell_t arg; 549 } args; 550 551 args.name = (cell_t)(uintptr_t)"interpret"; 552 args.nargs = 1; 553 args.nreturns = 0; 554 args.arg = (cell_t)(uintptr_t)"reset-all"; 555 openfirmware_core(&args); /* Don't do rendezvous! */ 556 557 for (;;); /* just in case */ 558 } 559 560 #endif /* AIM */ 561 562 void 563 OF_getetheraddr(device_t dev, u_char *addr) 564 { 565 phandle_t node; 566 567 node = ofw_bus_get_node(dev); 568 OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN); 569 } 570 571 /* 572 * Return a bus handle and bus tag that corresponds to the register 573 * numbered regno for the device referenced by the package handle 574 * dev. This function is intended to be used by console drivers in 575 * early boot only. It works by mapping the address of the device's 576 * register in the address space of its parent and recursively walk 577 * the device tree upward this way. 578 */ 579 int 580 OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag, 581 bus_space_handle_t *handle, bus_size_t *sz) 582 { 583 bus_addr_t addr; 584 bus_size_t size; 585 pcell_t pci_hi; 586 int flags, res; 587 588 res = ofw_reg_to_paddr(dev, regno, &addr, &size, &pci_hi); 589 if (res < 0) 590 return (res); 591 592 if (pci_hi == OFW_PADDR_NOT_PCI) { 593 *tag = &bs_be_tag; 594 flags = 0; 595 } else { 596 *tag = &bs_le_tag; 597 flags = (pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) ? 598 BUS_SPACE_MAP_PREFETCHABLE: 0; 599 } 600 601 if (sz != NULL) 602 *sz = size; 603 604 return (bus_space_map(*tag, addr, size, flags, handle)); 605 } 606 607