arch/parisc/kernel/inventory.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
setup_pdc
set_pmem_entry
pagezero_memconfig
pat_query_module
pat_memconfig
pat_inventory
sprockets_memconfig
legacy_create_device
snake_inventory
add_system_map_addresses
system_map_inventory
do_memory_inventory
do_device_inventory
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * inventory.c
   4  *
   5  * Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries)
   6  * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
   7  *
   8  * These are the routines to discover what hardware exists in this box.
   9  * This task is complicated by there being 3 different ways of
  10  * performing an inventory, depending largely on the age of the box.
  11  * The recommended way to do this is to check to see whether the machine
  12  * is a `Snake' first, then try System Map, then try PAT.  We try System
  13  * Map before checking for a Snake -- this probably doesn't cause any
  14  * problems, but...
  15  */
  16 
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/slab.h>
  21 #include <linux/mm.h>
  22 #include <asm/hardware.h>
  23 #include <asm/io.h>
  24 #include <asm/mmzone.h>
  25 #include <asm/pdc.h>
  26 #include <asm/pdcpat.h>
  27 #include <asm/processor.h>
  28 #include <asm/page.h>
  29 #include <asm/parisc-device.h>
  30 #include <asm/tlbflush.h>
  31 
  32 /*
  33 ** Debug options
  34 ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
  35 */
  36 #undef DEBUG_PAT
  37 
  38 int pdc_type __ro_after_init = PDC_TYPE_ILLEGAL;
  39 
  40 /* cell number and location (PAT firmware only) */
  41 unsigned long parisc_cell_num __ro_after_init;
  42 unsigned long parisc_cell_loc __ro_after_init;
  43 unsigned long parisc_pat_pdc_cap __ro_after_init;
  44 
  45 
  46 void __init setup_pdc(void)
  47 {
  48         long status;
  49         unsigned int bus_id;
  50         struct pdc_system_map_mod_info module_result;
  51         struct pdc_module_path module_path;
  52         struct pdc_model model;
  53 #ifdef CONFIG_64BIT
  54         struct pdc_pat_cell_num cell_info;
  55 #endif
  56 
  57         /* Determine the pdc "type" used on this machine */
  58 
  59         printk(KERN_INFO "Determining PDC firmware type: ");
  60 
  61         status = pdc_system_map_find_mods(&module_result, &module_path, 0);
  62         if (status == PDC_OK) {
  63                 pdc_type = PDC_TYPE_SYSTEM_MAP;
  64                 pr_cont("System Map.\n");
  65                 return;
  66         }
  67 
  68         /*
  69          * If the machine doesn't support PDC_SYSTEM_MAP then either it
  70          * is a pdc pat box, or it is an older box. All 64 bit capable
  71          * machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.
  72          */
  73 
  74         /*
  75          * TODO: We should test for 64 bit capability and give a
  76          * clearer message.
  77          */
  78 
  79 #ifdef CONFIG_64BIT
  80         status = pdc_pat_cell_get_number(&cell_info);
  81         if (status == PDC_OK) {
  82                 unsigned long legacy_rev, pat_rev;
  83                 pdc_type = PDC_TYPE_PAT;
  84                 pr_cont("64 bit PAT.\n");
  85                 parisc_cell_num = cell_info.cell_num;
  86                 parisc_cell_loc = cell_info.cell_loc;
  87                 pr_info("PAT: Running on cell %lu and location %lu.\n",
  88                         parisc_cell_num, parisc_cell_loc);
  89                 status = pdc_pat_pd_get_pdc_revisions(&legacy_rev,
  90                         &pat_rev, &parisc_pat_pdc_cap);
  91                 pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",
  92                         legacy_rev, pat_rev, parisc_pat_pdc_cap,
  93                         parisc_pat_pdc_cap
  94                          & PDC_PAT_CAPABILITY_BIT_SIMULTANEOUS_PTLB ? 1:0,
  95                         parisc_pat_pdc_cap
  96                          & PDC_PAT_CAPABILITY_BIT_PDC_HPMC_RENDEZ   ? 1:0);
  97                 return;
  98         }
  99 #endif
 100 
 101         /* Check the CPU's bus ID.  There's probably a better test.  */
 102 
 103         status = pdc_model_info(&model);
 104 
 105         bus_id = (model.hversion >> (4 + 7)) & 0x1f;
 106 
 107         switch (bus_id) {
 108         case 0x4:               /* 720, 730, 750, 735, 755 */
 109         case 0x6:               /* 705, 710 */
 110         case 0x7:               /* 715, 725 */
 111         case 0x8:               /* 745, 747, 742 */
 112         case 0xA:               /* 712 and similar */
 113         case 0xC:               /* 715/64, at least */
 114 
 115                 pdc_type = PDC_TYPE_SNAKE;
 116                 pr_cont("Snake.\n");
 117                 return;
 118 
 119         default:                /* Everything else */
 120 
 121                 pr_cont("Unsupported.\n");
 122                 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
 123         }
 124 }
 125 
 126 #define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
 127 
 128 static void __init
 129 set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
 130                unsigned long pages4k)
 131 {
 132         /* Rather than aligning and potentially throwing away
 133          * memory, we'll assume that any ranges are already
 134          * nicely aligned with any reasonable page size, and
 135          * panic if they are not (it's more likely that the
 136          * pdc info is bad in this case).
 137          */
 138 
 139         if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
 140             || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
 141 
 142                 panic("Memory range doesn't align with page size!\n");
 143         }
 144 
 145         pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
 146         pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
 147 }
 148 
 149 static void __init pagezero_memconfig(void)
 150 {
 151         unsigned long npages;
 152 
 153         /* Use the 32 bit information from page zero to create a single
 154          * entry in the pmem_ranges[] table.
 155          *
 156          * We currently don't support machines with contiguous memory
 157          * >= 4 Gb, who report that memory using 64 bit only fields
 158          * on page zero. It's not worth doing until it can be tested,
 159          * and it is not clear we can support those machines for other
 160          * reasons.
 161          *
 162          * If that support is done in the future, this is where it
 163          * should be done.
 164          */
 165 
 166         npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
 167         set_pmem_entry(pmem_ranges,0UL,npages);
 168         npmem_ranges = 1;
 169 }
 170 
 171 #ifdef CONFIG_64BIT
 172 
 173 /* All of the PDC PAT specific code is 64-bit only */
 174 
 175 /*
 176 **  The module object is filled via PDC_PAT_CELL[Return Cell Module].
 177 **  If a module is found, register module will get the IODC bytes via
 178 **  pdc_iodc_read() using the PA view of conf_base_addr for the hpa parameter.
 179 **
 180 **  The IO view can be used by PDC_PAT_CELL[Return Cell Module]
 181 **  only for SBAs and LBAs.  This view will cause an invalid
 182 **  argument error for all other cell module types.
 183 **
 184 */
 185 
 186 static int __init 
 187 pat_query_module(ulong pcell_loc, ulong mod_index)
 188 {
 189         pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
 190         unsigned long bytecnt;
 191         unsigned long temp;     /* 64-bit scratch value */
 192         long status;            /* PDC return value status */
 193         struct parisc_device *dev;
 194 
 195         pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
 196         if (!pa_pdc_cell)
 197                 panic("couldn't allocate memory for PDC_PAT_CELL!");
 198 
 199         /* return cell module (PA or Processor view) */
 200         status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
 201                                      PA_VIEW, pa_pdc_cell);
 202 
 203         if (status != PDC_OK) {
 204                 /* no more cell modules or error */
 205                 kfree(pa_pdc_cell);
 206                 return status;
 207         }
 208 
 209         temp = pa_pdc_cell->cba;
 210         dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
 211         if (!dev) {
 212                 kfree(pa_pdc_cell);
 213                 return PDC_OK;
 214         }
 215 
 216         /* alloc_pa_dev sets dev->hpa */
 217 
 218         /*
 219         ** save parameters in the parisc_device
 220         ** (The idea being the device driver will call pdc_pat_cell_module()
 221         ** and store the results in its own data structure.)
 222         */
 223         dev->pcell_loc = pcell_loc;
 224         dev->mod_index = mod_index;
 225 
 226         /* save generic info returned from the call */
 227         /* REVISIT: who is the consumer of this? not sure yet... */
 228         dev->mod_info = pa_pdc_cell->mod_info;  /* pass to PAT_GET_ENTITY() */
 229         dev->pmod_loc = pa_pdc_cell->mod_location;
 230         dev->mod0 = pa_pdc_cell->mod[0];
 231 
 232         register_parisc_device(dev);    /* advertise device */
 233 
 234 #ifdef DEBUG_PAT
 235         /* dump what we see so far... */
 236         switch (PAT_GET_ENTITY(dev->mod_info)) {
 237                 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
 238                 unsigned long i;
 239 
 240         case PAT_ENTITY_PROC:
 241                 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
 242                         pa_pdc_cell->mod[0]);
 243                 break;
 244 
 245         case PAT_ENTITY_MEM:
 246                 printk(KERN_DEBUG 
 247                         "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
 248                         pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
 249                         pa_pdc_cell->mod[2]);
 250                 break;
 251         case PAT_ENTITY_CA:
 252                 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
 253                 break;
 254 
 255         case PAT_ENTITY_PBC:
 256                 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
 257                 goto print_ranges;
 258 
 259         case PAT_ENTITY_SBA:
 260                 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
 261                 goto print_ranges;
 262 
 263         case PAT_ENTITY_LBA:
 264                 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
 265 
 266  print_ranges:
 267                 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
 268                                     IO_VIEW, &io_pdc_cell);
 269                 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
 270                 for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
 271                         printk(KERN_DEBUG 
 272                                 "  PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", 
 273                                 i, pa_pdc_cell->mod[2 + i * 3], /* type */
 274                                 pa_pdc_cell->mod[3 + i * 3],    /* start */
 275                                 pa_pdc_cell->mod[4 + i * 3]);   /* finish (ie end) */
 276                         printk(KERN_DEBUG 
 277                                 "  IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", 
 278                                 i, io_pdc_cell.mod[2 + i * 3],  /* type */
 279                                 io_pdc_cell.mod[3 + i * 3],     /* start */
 280                                 io_pdc_cell.mod[4 + i * 3]);    /* finish (ie end) */
 281                 }
 282                 printk(KERN_DEBUG "\n");
 283                 break;
 284         }
 285 #endif /* DEBUG_PAT */
 286 
 287         kfree(pa_pdc_cell);
 288 
 289         return PDC_OK;
 290 }
 291 
 292 
 293 /* pat pdc can return information about a variety of different
 294  * types of memory (e.g. firmware,i/o, etc) but we only care about
 295  * the usable physical ram right now. Since the firmware specific
 296  * information is allocated on the stack, we'll be generous, in
 297  * case there is a lot of other information we don't care about.
 298  */
 299 
 300 #define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
 301 
 302 static void __init pat_memconfig(void)
 303 {
 304         unsigned long actual_len;
 305         struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
 306         struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
 307         physmem_range_t *pmem_ptr;
 308         long status;
 309         int entries;
 310         unsigned long length;
 311         int i;
 312 
 313         length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
 314 
 315         status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
 316 
 317         if ((status != PDC_OK)
 318             || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
 319 
 320                 /* The above pdc call shouldn't fail, but, just in
 321                  * case, just use the PAGE0 info.
 322                  */
 323 
 324                 printk("\n\n\n");
 325                 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
 326                         "All memory may not be used!\n\n\n");
 327                 pagezero_memconfig();
 328                 return;
 329         }
 330 
 331         entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
 332 
 333         if (entries > PAT_MAX_RANGES) {
 334                 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
 335                 printk(KERN_WARNING "Some memory may not be used!\n");
 336         }
 337 
 338         /* Copy information into the firmware independent pmem_ranges
 339          * array, skipping types we don't care about. Notice we said
 340          * "may" above. We'll use all the entries that were returned.
 341          */
 342 
 343         npmem_ranges = 0;
 344         mtbl_ptr = mem_table;
 345         pmem_ptr = pmem_ranges; /* Global firmware independent table */
 346         for (i = 0; i < entries; i++,mtbl_ptr++) {
 347                 if (   (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
 348                     || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
 349                     || (mtbl_ptr->pages == 0)
 350                     || (   (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
 351                         && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
 352                         && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
 353 
 354                         continue;
 355                 }
 356 
 357                 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
 358                         printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
 359                         printk(KERN_WARNING "Some memory will not be used!\n");
 360                         break;
 361                 }
 362 
 363                 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
 364                 npmem_ranges++;
 365         }
 366 }
 367 
 368 static int __init pat_inventory(void)
 369 {
 370         int status;
 371         ulong mod_index = 0;
 372         struct pdc_pat_cell_num cell_info;
 373 
 374         /*
 375         ** Note:  Prelude (and it's successors: Lclass, A400/500) only
 376         **        implement PDC_PAT_CELL sub-options 0 and 2.
 377         */
 378         status = pdc_pat_cell_get_number(&cell_info);
 379         if (status != PDC_OK) {
 380                 return 0;
 381         }
 382 
 383 #ifdef DEBUG_PAT
 384         printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num, 
 385                cell_info.cell_loc);
 386 #endif
 387 
 388         while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
 389                 mod_index++;
 390         }
 391 
 392         return mod_index;
 393 }
 394 
 395 /* We only look for extended memory ranges on a 64 bit capable box */
 396 static void __init sprockets_memconfig(void)
 397 {
 398         struct pdc_memory_table_raddr r_addr;
 399         struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
 400         struct pdc_memory_table *mtbl_ptr;
 401         physmem_range_t *pmem_ptr;
 402         long status;
 403         int entries;
 404         int i;
 405 
 406         status = pdc_mem_mem_table(&r_addr,mem_table,
 407                                 (unsigned long)MAX_PHYSMEM_RANGES);
 408 
 409         if (status != PDC_OK) {
 410 
 411                 /* The above pdc call only works on boxes with sprockets
 412                  * firmware (newer B,C,J class). Other non PAT PDC machines
 413                  * do support more than 3.75 Gb of memory, but we don't
 414                  * support them yet.
 415                  */
 416 
 417                 pagezero_memconfig();
 418                 return;
 419         }
 420 
 421         if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
 422                 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
 423                 printk(KERN_WARNING "Some memory will not be used!\n");
 424         }
 425 
 426         entries = (int)r_addr.entries_returned;
 427 
 428         npmem_ranges = 0;
 429         mtbl_ptr = mem_table;
 430         pmem_ptr = pmem_ranges; /* Global firmware independent table */
 431         for (i = 0; i < entries; i++,mtbl_ptr++) {
 432                 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
 433                 npmem_ranges++;
 434         }
 435 }
 436 
 437 #else   /* !CONFIG_64BIT */
 438 
 439 #define pat_inventory() do { } while (0)
 440 #define pat_memconfig() do { } while (0)
 441 #define sprockets_memconfig() pagezero_memconfig()
 442 
 443 #endif  /* !CONFIG_64BIT */
 444 
 445 
 446 #ifndef CONFIG_PA20
 447 
 448 /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
 449 
 450 static struct parisc_device * __init
 451 legacy_create_device(struct pdc_memory_map *r_addr,
 452                 struct pdc_module_path *module_path)
 453 {
 454         struct parisc_device *dev;
 455         int status = pdc_mem_map_hpa(r_addr, module_path);
 456         if (status != PDC_OK)
 457                 return NULL;
 458 
 459         dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
 460         if (dev == NULL)
 461                 return NULL;
 462 
 463         register_parisc_device(dev);
 464         return dev;
 465 }
 466 
 467 /**
 468  * snake_inventory
 469  *
 470  * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
 471  * To use it, we initialise the mod_path.bc to 0xff and try all values of
 472  * mod to get the HPA for the top-level devices.  Bus adapters may have
 473  * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
 474  * module, then trying all possible functions.
 475  */
 476 static void __init snake_inventory(void)
 477 {
 478         int mod;
 479         for (mod = 0; mod < 16; mod++) {
 480                 struct parisc_device *dev;
 481                 struct pdc_module_path module_path;
 482                 struct pdc_memory_map r_addr;
 483                 unsigned int func;
 484 
 485                 memset(module_path.path.bc, 0xff, 6);
 486                 module_path.path.mod = mod;
 487                 dev = legacy_create_device(&r_addr, &module_path);
 488                 if ((!dev) || (dev->id.hw_type != HPHW_BA))
 489                         continue;
 490 
 491                 memset(module_path.path.bc, 0xff, 4);
 492                 module_path.path.bc[4] = mod;
 493 
 494                 for (func = 0; func < 16; func++) {
 495                         module_path.path.bc[5] = 0;
 496                         module_path.path.mod = func;
 497                         legacy_create_device(&r_addr, &module_path);
 498                 }
 499         }
 500 }
 501 
 502 #else /* CONFIG_PA20 */
 503 #define snake_inventory() do { } while (0)
 504 #endif  /* CONFIG_PA20 */
 505 
 506 /* Common 32/64 bit based code goes here */
 507 
 508 /**
 509  * add_system_map_addresses - Add additional addresses to the parisc device.
 510  * @dev: The parisc device.
 511  * @num_addrs: Then number of addresses to add;
 512  * @module_instance: The system_map module instance.
 513  *
 514  * This function adds any additional addresses reported by the system_map
 515  * firmware to the parisc device.
 516  */
 517 static void __init
 518 add_system_map_addresses(struct parisc_device *dev, int num_addrs, 
 519                          int module_instance)
 520 {
 521         int i;
 522         long status;
 523         struct pdc_system_map_addr_info addr_result;
 524 
 525         dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL);
 526         if(!dev->addr) {
 527                 printk(KERN_ERR "%s %s(): memory allocation failure\n",
 528                        __FILE__, __func__);
 529                 return;
 530         }
 531 
 532         for(i = 1; i <= num_addrs; ++i) {
 533                 status = pdc_system_map_find_addrs(&addr_result, 
 534                                                    module_instance, i);
 535                 if(PDC_OK == status) {
 536                         dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
 537                         dev->num_addrs++;
 538                 } else {
 539                         printk(KERN_WARNING 
 540                                "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
 541                                status, i);
 542                 }
 543         }
 544 }
 545 
 546 /**
 547  * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
 548  *
 549  * This function attempts to retrieve and register all the devices firmware
 550  * knows about via the SYSTEM_MAP PDC call.
 551  */
 552 static void __init system_map_inventory(void)
 553 {
 554         int i;
 555         long status = PDC_OK;
 556     
 557         for (i = 0; i < 256; i++) {
 558                 struct parisc_device *dev;
 559                 struct pdc_system_map_mod_info module_result;
 560                 struct pdc_module_path module_path;
 561 
 562                 status = pdc_system_map_find_mods(&module_result,
 563                                 &module_path, i);
 564                 if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
 565                         break;
 566                 if (status != PDC_OK)
 567                         continue;
 568 
 569                 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
 570                 if (!dev)
 571                         continue;
 572                 
 573                 register_parisc_device(dev);
 574 
 575                 /* if available, get the additional addresses for a module */
 576                 if (!module_result.add_addrs)
 577                         continue;
 578 
 579                 add_system_map_addresses(dev, module_result.add_addrs, i);
 580         }
 581 
 582         walk_central_bus();
 583         return;
 584 }
 585 
 586 void __init do_memory_inventory(void)
 587 {
 588         switch (pdc_type) {
 589 
 590         case PDC_TYPE_PAT:
 591                 pat_memconfig();
 592                 break;
 593 
 594         case PDC_TYPE_SYSTEM_MAP:
 595                 sprockets_memconfig();
 596                 break;
 597 
 598         case PDC_TYPE_SNAKE:
 599                 pagezero_memconfig();
 600                 return;
 601 
 602         default:
 603                 panic("Unknown PDC type!\n");
 604         }
 605 
 606         if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
 607                 printk(KERN_WARNING "Bad memory configuration returned!\n");
 608                 printk(KERN_WARNING "Some memory may not be used!\n");
 609                 pagezero_memconfig();
 610         }
 611 }
 612 
 613 void __init do_device_inventory(void)
 614 {
 615         printk(KERN_INFO "Searching for devices...\n");
 616 
 617         init_parisc_bus();
 618 
 619         switch (pdc_type) {
 620 
 621         case PDC_TYPE_PAT:
 622                 pat_inventory();
 623                 break;
 624 
 625         case PDC_TYPE_SYSTEM_MAP:
 626                 system_map_inventory();
 627                 break;
 628 
 629         case PDC_TYPE_SNAKE:
 630                 snake_inventory();
 631                 break;
 632 
 633         default:
 634                 panic("Unknown PDC type!\n");
 635         }
 636         printk(KERN_INFO "Found devices:\n");
 637         print_parisc_devices();
 638 
 639 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
 640         pa_serialize_tlb_flushes = machine_has_merced_bus();
 641         if (pa_serialize_tlb_flushes)
 642                 pr_info("Merced bus found: Enable PxTLB serialization.\n");
 643 #endif
 644 }
/* [<][>][^][v][top][bottom][index][help] */
root/arch/parisc/kernel/inventory.c

DEFINITIONS
