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 <sys/param.h> 38 #include <sys/bus.h> 39 #include <sys/systm.h> 40 #include <sys/conf.h> 41 #include <sys/disk.h> 42 #include <sys/fcntl.h> 43 #include <sys/malloc.h> 44 #include <sys/smp.h> 45 #include <sys/stat.h> 46 47 #include <net/ethernet.h> 48 49 #include <dev/ofw/openfirm.h> 50 #include <dev/ofw/ofw_pci.h> 51 #include <dev/ofw/ofw_bus.h> 52 53 #include <vm/vm.h> 54 #include <vm/vm_param.h> 55 #include <vm/vm_page.h> 56 57 #include <machine/bus.h> 58 #include <machine/cpu.h> 59 #include <machine/md_var.h> 60 #include <machine/platform.h> 61 #include <machine/ofw_machdep.h> 62 #include <machine/trap.h> 63 64 #ifdef AIM 65 extern register_t ofmsr[5]; 66 extern void *openfirmware_entry; 67 static void *fdt; 68 int ofw_real_mode; 69 extern char save_trap_init[0x2f00]; /* EXC_LAST */ 70 char save_trap_of[0x2f00]; /* EXC_LAST */ 71 72 int ofwcall(void *); 73 static int openfirmware(void *args); 74 75 __inline void 76 ofw_save_trap_vec(char *save_trap_vec) 77 { 78 if (!ofw_real_mode) 79 return; 80 81 bcopy((void *)EXC_RST, save_trap_vec, EXC_LAST - EXC_RST); 82 } 83 84 static __inline void 85 ofw_restore_trap_vec(char *restore_trap_vec) 86 { 87 if (!ofw_real_mode) 88 return; 89 90 bcopy(restore_trap_vec, (void *)EXC_RST, EXC_LAST - EXC_RST); 91 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 92 } 93 94 /* 95 * Saved SPRG0-3 from OpenFirmware. Will be restored prior to the callback. 96 */ 97 register_t ofw_sprg0_save; 98 99 static __inline void 100 ofw_sprg_prepare(void) 101 { 102 if (ofw_real_mode) 103 return; 104 105 /* 106 * Assume that interrupt are disabled at this point, or 107 * SPRG1-3 could be trashed 108 */ 109 __asm __volatile("mfsprg0 %0\n\t" 110 "mtsprg0 %1\n\t" 111 "mtsprg1 %2\n\t" 112 "mtsprg2 %3\n\t" 113 "mtsprg3 %4\n\t" 114 : "=&r"(ofw_sprg0_save) 115 : "r"(ofmsr[1]), 116 "r"(ofmsr[2]), 117 "r"(ofmsr[3]), 118 "r"(ofmsr[4])); 119 } 120 121 static __inline void 122 ofw_sprg_restore(void) 123 { 124 if (ofw_real_mode) 125 return; 126 127 /* 128 * Note that SPRG1-3 contents are irrelevant. They are scratch 129 * registers used in the early portion of trap handling when 130 * interrupts are disabled. 131 * 132 * PCPU data cannot be used until this routine is called ! 133 */ 134 __asm __volatile("mtsprg0 %0" :: "r"(ofw_sprg0_save)); 135 } 136 #endif 137 138 static int 139 parse_ofw_memory(phandle_t node, const char *prop, struct mem_region *output) 140 { 141 cell_t address_cells, size_cells; 142 cell_t OFmem[4 * PHYS_AVAIL_SZ]; 143 int sz, i, j; 144 int apple_hack_mode; 145 phandle_t phandle; 146 147 sz = 0; 148 apple_hack_mode = 0; 149 150 /* 151 * Get #address-cells from root node, defaulting to 1 if it cannot 152 * be found. 153 */ 154 phandle = OF_finddevice("/"); 155 if (OF_getprop(phandle, "#address-cells", &address_cells, 156 sizeof(address_cells)) < (ssize_t)sizeof(address_cells)) 157 address_cells = 1; 158 if (OF_getprop(phandle, "#size-cells", &size_cells, 159 sizeof(size_cells)) < (ssize_t)sizeof(size_cells)) 160 size_cells = 1; 161 162 /* 163 * Get memory. 164 */ 165 if (node == -1 || (sz = OF_getprop(node, prop, 166 OFmem, sizeof(OFmem))) <= 0) 167 panic("Physical memory map not found"); 168 169 i = 0; 170 j = 0; 171 while (i < sz/sizeof(cell_t)) { 172 #ifndef __powerpc64__ 173 /* On 32-bit PPC, ignore regions starting above 4 GB */ 174 if (address_cells > 1 && OFmem[i] > 0) { 175 i += address_cells + size_cells; 176 continue; 177 } 178 #endif 179 180 output[j].mr_start = OFmem[i++]; 181 if (address_cells == 2) { 182 #ifdef __powerpc64__ 183 output[j].mr_start <<= 32; 184 #endif 185 output[j].mr_start += OFmem[i++]; 186 } 187 188 output[j].mr_size = OFmem[i++]; 189 if (size_cells == 2) { 190 #ifdef __powerpc64__ 191 output[j].mr_size <<= 32; 192 #endif 193 output[j].mr_size += OFmem[i++]; 194 } 195 196 #ifndef __powerpc64__ 197 /* 198 * Check for memory regions extending above 32-bit 199 * memory space, and restrict them to stay there. 200 */ 201 if (((uint64_t)output[j].mr_start + 202 (uint64_t)output[j].mr_size) > 203 BUS_SPACE_MAXADDR_32BIT) { 204 output[j].mr_size = BUS_SPACE_MAXADDR_32BIT - 205 output[j].mr_start; 206 } 207 #endif 208 209 j++; 210 } 211 sz = j*sizeof(output[0]); 212 213 return (sz); 214 } 215 216 /* 217 * This is called during powerpc_init, before the system is really initialized. 218 * It shall provide the total and the available regions of RAM. 219 * Both lists must have a zero-size entry as terminator. 220 * The available regions need not take the kernel into account, but needs 221 * to provide space for two additional entry beyond the terminating one. 222 */ 223 void 224 ofw_mem_regions(struct mem_region *memp, int *memsz, 225 struct mem_region *availp, int *availsz) 226 { 227 phandle_t phandle; 228 int asz, msz; 229 int res; 230 char name[31]; 231 232 asz = msz = 0; 233 234 /* 235 * Get memory from all the /memory nodes. 236 */ 237 for (phandle = OF_child(OF_peer(0)); phandle != 0; 238 phandle = OF_peer(phandle)) { 239 if (OF_getprop(phandle, "name", name, sizeof(name)) <= 0) 240 continue; 241 if (strncmp(name, "memory", sizeof(name)) != 0) 242 continue; 243 244 res = parse_ofw_memory(phandle, "reg", &memp[msz]); 245 msz += res/sizeof(struct mem_region); 246 if (OF_getproplen(phandle, "available") >= 0) 247 res = parse_ofw_memory(phandle, "available", 248 &availp[asz]); 249 else 250 res = parse_ofw_memory(phandle, "reg", &availp[asz]); 251 asz += res/sizeof(struct mem_region); 252 } 253 254 *memsz = msz; 255 *availsz = asz; 256 } 257 258 #ifdef AIM 259 void 260 OF_initial_setup(void *fdt_ptr, void *junk, int (*openfirm)(void *)) 261 { 262 if (ofmsr[0] & PSL_DR) 263 ofw_real_mode = 0; 264 else 265 ofw_real_mode = 1; 266 267 fdt = fdt_ptr; 268 269 #ifdef FDT_DTB_STATIC 270 /* Check for a statically included blob */ 271 if (fdt == NULL) 272 fdt = &fdt_static_dtb; 273 #endif 274 } 275 276 boolean_t 277 OF_bootstrap() 278 { 279 boolean_t status = FALSE; 280 281 if (openfirmware_entry != NULL) { 282 if (ofw_real_mode) { 283 status = OF_install(OFW_STD_REAL, 0); 284 } else { 285 #ifdef __powerpc64__ 286 status = OF_install(OFW_STD_32BIT, 0); 287 #else 288 status = OF_install(OFW_STD_DIRECT, 0); 289 #endif 290 } 291 292 if (status != TRUE) 293 return status; 294 295 OF_init(openfirmware); 296 } else if (fdt != NULL) { 297 status = OF_install(OFW_FDT, 0); 298 299 if (status != TRUE) 300 return status; 301 302 OF_init(fdt); 303 } 304 305 return (status); 306 } 307 308 void 309 ofw_quiesce(void) 310 { 311 struct { 312 cell_t name; 313 cell_t nargs; 314 cell_t nreturns; 315 } args; 316 317 KASSERT(!pmap_bootstrapped, ("Cannot call ofw_quiesce after VM is up")); 318 319 args.name = (cell_t)(uintptr_t)"quiesce"; 320 args.nargs = 0; 321 args.nreturns = 0; 322 openfirmware(&args); 323 } 324 325 static int 326 openfirmware_core(void *args) 327 { 328 int result; 329 register_t oldmsr; 330 331 /* 332 * Turn off exceptions - we really don't want to end up 333 * anywhere unexpected with PCPU set to something strange 334 * or the stack pointer wrong. 335 */ 336 oldmsr = intr_disable(); 337 338 ofw_sprg_prepare(); 339 340 /* Save trap vectors */ 341 ofw_save_trap_vec(save_trap_of); 342 343 /* Restore initially saved trap vectors */ 344 ofw_restore_trap_vec(save_trap_init); 345 346 #if defined(AIM) && !defined(__powerpc64__) 347 /* 348 * Clear battable[] translations 349 */ 350 if (!(cpu_features & PPC_FEATURE_64)) 351 __asm __volatile("mtdbatu 2, %0\n" 352 "mtdbatu 3, %0" : : "r" (0)); 353 isync(); 354 #endif 355 356 result = ofwcall(args); 357 358 /* Restore trap vecotrs */ 359 ofw_restore_trap_vec(save_trap_of); 360 361 ofw_sprg_restore(); 362 363 intr_restore(oldmsr); 364 365 return (result); 366 } 367 368 #ifdef SMP 369 struct ofw_rv_args { 370 void *args; 371 int retval; 372 volatile int in_progress; 373 }; 374 375 static void 376 ofw_rendezvous_dispatch(void *xargs) 377 { 378 struct ofw_rv_args *rv_args = xargs; 379 380 /* NOTE: Interrupts are disabled here */ 381 382 if (PCPU_GET(cpuid) == 0) { 383 /* 384 * Execute all OF calls on CPU 0 385 */ 386 rv_args->retval = openfirmware_core(rv_args->args); 387 rv_args->in_progress = 0; 388 } else { 389 /* 390 * Spin with interrupts off on other CPUs while OF has 391 * control of the machine. 392 */ 393 while (rv_args->in_progress) 394 cpu_spinwait(); 395 } 396 } 397 #endif 398 399 static int 400 openfirmware(void *args) 401 { 402 int result; 403 #ifdef SMP 404 struct ofw_rv_args rv_args; 405 406 rv_args.args = args; 407 rv_args.in_progress = 1; 408 smp_rendezvous(smp_no_rendevous_barrier, ofw_rendezvous_dispatch, 409 smp_no_rendevous_barrier, &rv_args); 410 result = rv_args.retval; 411 #else 412 result = openfirmware_core(args); 413 #endif 414 415 return (result); 416 } 417 418 void 419 OF_reboot() 420 { 421 struct { 422 cell_t name; 423 cell_t nargs; 424 cell_t nreturns; 425 cell_t arg; 426 } args; 427 428 args.name = (cell_t)(uintptr_t)"interpret"; 429 args.nargs = 1; 430 args.nreturns = 0; 431 args.arg = (cell_t)(uintptr_t)"reset-all"; 432 openfirmware_core(&args); /* Don't do rendezvous! */ 433 434 for (;;); /* just in case */ 435 } 436 437 #endif /* AIM */ 438 439 void 440 OF_getetheraddr(device_t dev, u_char *addr) 441 { 442 phandle_t node; 443 444 node = ofw_bus_get_node(dev); 445 OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN); 446 } 447 448 /* 449 * Return a bus handle and bus tag that corresponds to the register 450 * numbered regno for the device referenced by the package handle 451 * dev. This function is intended to be used by console drivers in 452 * early boot only. It works by mapping the address of the device's 453 * register in the address space of its parent and recursively walk 454 * the device tree upward this way. 455 */ 456 static void 457 OF_get_addr_props(phandle_t node, uint32_t *addrp, uint32_t *sizep, int *pcip) 458 { 459 char type[64]; 460 uint32_t addr, size; 461 int pci, res; 462 463 res = OF_getprop(node, "#address-cells", &addr, sizeof(addr)); 464 if (res == -1) 465 addr = 2; 466 res = OF_getprop(node, "#size-cells", &size, sizeof(size)); 467 if (res == -1) 468 size = 1; 469 pci = 0; 470 if (addr == 3 && size == 2) { 471 res = OF_getprop(node, "device_type", type, sizeof(type)); 472 if (res != -1) { 473 type[sizeof(type) - 1] = '\0'; 474 pci = (strcmp(type, "pci") == 0) ? 1 : 0; 475 } 476 } 477 if (addrp != NULL) 478 *addrp = addr; 479 if (sizep != NULL) 480 *sizep = size; 481 if (pcip != NULL) 482 *pcip = pci; 483 } 484 485 int 486 OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag, 487 bus_space_handle_t *handle) 488 { 489 uint32_t cell[32]; 490 bus_addr_t addr, raddr, baddr; 491 bus_size_t size, rsize; 492 uint32_t c, nbridge, naddr, nsize; 493 phandle_t bridge, parent; 494 u_int spc, rspc, prefetch; 495 int pci, pcib, res; 496 497 /* Sanity checking. */ 498 if (dev == 0) 499 return (EINVAL); 500 bridge = OF_parent(dev); 501 if (bridge == 0) 502 return (EINVAL); 503 if (regno < 0) 504 return (EINVAL); 505 if (tag == NULL || handle == NULL) 506 return (EINVAL); 507 508 /* Assume big-endian unless we find a PCI device */ 509 *tag = &bs_be_tag; 510 511 /* Get the requested register. */ 512 OF_get_addr_props(bridge, &naddr, &nsize, &pci); 513 if (pci) 514 *tag = &bs_le_tag; 515 res = OF_getprop(dev, (pci) ? "assigned-addresses" : "reg", 516 cell, sizeof(cell)); 517 if (res == -1) 518 return (ENXIO); 519 if (res % sizeof(cell[0])) 520 return (ENXIO); 521 res /= sizeof(cell[0]); 522 regno *= naddr + nsize; 523 if (regno + naddr + nsize > res) 524 return (EINVAL); 525 spc = (pci) ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK : ~0; 526 prefetch = (pci) ? cell[regno] & OFW_PCI_PHYS_HI_PREFETCHABLE : 0; 527 addr = 0; 528 for (c = 0; c < naddr; c++) 529 addr = ((uint64_t)addr << 32) | cell[regno++]; 530 size = 0; 531 for (c = 0; c < nsize; c++) 532 size = ((uint64_t)size << 32) | cell[regno++]; 533 534 /* 535 * Map the address range in the bridge's decoding window as given 536 * by the "ranges" property. If a node doesn't have such property 537 * then no mapping is done. 538 */ 539 parent = OF_parent(bridge); 540 while (parent != 0) { 541 OF_get_addr_props(parent, &nbridge, NULL, &pcib); 542 if (pcib) 543 *tag = &bs_le_tag; 544 res = OF_getprop(bridge, "ranges", cell, sizeof(cell)); 545 if (res == -1) 546 goto next; 547 if (res % sizeof(cell[0])) 548 return (ENXIO); 549 res /= sizeof(cell[0]); 550 regno = 0; 551 while (regno < res) { 552 rspc = (pci) 553 ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK 554 : ~0; 555 if (rspc != spc) { 556 regno += naddr + nbridge + nsize; 557 continue; 558 } 559 raddr = 0; 560 for (c = 0; c < naddr; c++) 561 raddr = ((uint64_t)raddr << 32) | cell[regno++]; 562 rspc = (pcib) 563 ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK 564 : ~0; 565 baddr = 0; 566 for (c = 0; c < nbridge; c++) 567 baddr = ((uint64_t)baddr << 32) | cell[regno++]; 568 rsize = 0; 569 for (c = 0; c < nsize; c++) 570 rsize = ((uint64_t)rsize << 32) | cell[regno++]; 571 if (addr < raddr || addr >= raddr + rsize) 572 continue; 573 addr = addr - raddr + baddr; 574 if (rspc != ~0) 575 spc = rspc; 576 } 577 578 next: 579 bridge = parent; 580 parent = OF_parent(bridge); 581 OF_get_addr_props(bridge, &naddr, &nsize, &pci); 582 } 583 584 return (bus_space_map(*tag, addr, size, 585 prefetch ? BUS_SPACE_MAP_PREFETCHABLE : 0, handle)); 586 } 587 588