git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/platforms/iseries/setup.c

   1 /*
   2  *    Copyright (c) 2000 Mike Corrigan <mikejc@us.ibm.com>
   3  *    Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
   4  *
   5  *    Description:
   6  *      Architecture- / platform-specific boot-time initialization code for
   7  *      the IBM iSeries LPAR.  Adapted from original code by Grant Erickson and
   8  *      code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
   9  *      <dan@net4x.com>.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #undef DEBUG
  18
  19 #include <linux/init.h>
  20 #include <linux/threads.h>
  21 #include <linux/smp.h>
  22 #include <linux/param.h>
  23 #include <linux/string.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/kdev_t.h>
  26 #include <linux/kexec.h>
  27 #include <linux/major.h>
  28 #include <linux/root_dev.h>
  29 #include <linux/kernel.h>
  30 #include <linux/hrtimer.h>
  31 #include <linux/tick.h>
  32
  33 #include <asm/processor.h>
  34 #include <asm/machdep.h>
  35 #include <asm/page.h>
  36 #include <asm/mmu.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/mmu_context.h>
  39 #include <asm/cputable.h>
  40 #include <asm/sections.h>
  41 #include <asm/iommu.h>
  42 #include <asm/firmware.h>
  43 #include <asm/system.h>
  44 #include <asm/time.h>
  45 #include <asm/paca.h>
  46 #include <asm/cache.h>
  47 #include <asm/abs_addr.h>
  48 #include <asm/iseries/hv_lp_config.h>
  49 #include <asm/iseries/hv_call_event.h>
  50 #include <asm/iseries/hv_call_xm.h>
  51 #include <asm/iseries/it_lp_queue.h>
  52 #include <asm/iseries/mf.h>
  53 #include <asm/iseries/hv_lp_event.h>
  54 #include <asm/iseries/lpar_map.h>
  55 #include <asm/udbg.h>
  56 #include <asm/irq.h>
  57
  58 #include "naca.h"
  59 #include "setup.h"
  60 #include "irq.h"
  61 #include "vpd_areas.h"
  62 #include "processor_vpd.h"
  63 #include "it_lp_naca.h"
  64 #include "main_store.h"
  65 #include "call_sm.h"
  66 #include "call_hpt.h"
  67 #include "pci.h"
  68
  69 #ifdef DEBUG
  70 #define DBG(fmt...) udbg_printf(fmt)
  71 #else
  72 #define DBG(fmt...)
  73 #endif
  74
  75 /* Function Prototypes */
  76 static unsigned long build_iSeries_Memory_Map(void);
  77 static void iseries_shared_idle(void);
  78 static void iseries_dedicated_idle(void);
  79
  80
  81 struct MemoryBlock {
  82         unsigned long absStart;
  83         unsigned long absEnd;
  84         unsigned long logicalStart;
  85         unsigned long logicalEnd;
  86 };
  87
  88 /*
  89  * Process the main store vpd to determine where the holes in memory are
  90  * and return the number of physical blocks and fill in the array of
  91  * block data.
  92  */
  93 static unsigned long iSeries_process_Condor_mainstore_vpd(
  94                 struct MemoryBlock *mb_array, unsigned long max_entries)
  95 {
  96         unsigned long holeFirstChunk, holeSizeChunks;
  97         unsigned long numMemoryBlocks = 1;
  98         struct IoHriMainStoreSegment4 *msVpd =
  99                 (struct IoHriMainStoreSegment4 *)xMsVpd;
 100         unsigned long holeStart = msVpd->nonInterleavedBlocksStartAdr;
 101         unsigned long holeEnd = msVpd->nonInterleavedBlocksEndAdr;
 102         unsigned long holeSize = holeEnd - holeStart;
 103
 104         printk("Mainstore_VPD: Condor\n");
 105         /*
 106          * Determine if absolute memory has any
 107          * holes so that we can interpret the
 108          * access map we get back from the hypervisor
 109          * correctly.
 110          */
 111         mb_array[0].logicalStart = 0;
 112         mb_array[0].logicalEnd = 0x100000000UL;
 113         mb_array[0].absStart = 0;
 114         mb_array[0].absEnd = 0x100000000UL;
 115
 116         if (holeSize) {
 117                 numMemoryBlocks = 2;
 118                 holeStart = holeStart & 0x000fffffffffffffUL;
 119                 holeStart = addr_to_chunk(holeStart);
 120                 holeFirstChunk = holeStart;
 121                 holeSize = addr_to_chunk(holeSize);
 122                 holeSizeChunks = holeSize;
 123                 printk( "Main store hole: start chunk = %0lx, size = %0lx chunks\n",
 124                                 holeFirstChunk, holeSizeChunks );
 125                 mb_array[0].logicalEnd = holeFirstChunk;
 126                 mb_array[0].absEnd = holeFirstChunk;
 127                 mb_array[1].logicalStart = holeFirstChunk;
 128                 mb_array[1].logicalEnd = 0x100000000UL - holeSizeChunks;
 129                 mb_array[1].absStart = holeFirstChunk + holeSizeChunks;
 130                 mb_array[1].absEnd = 0x100000000UL;
 131         }
 132         return numMemoryBlocks;
 133 }
 134
 135 #define MaxSegmentAreas                 32
 136 #define MaxSegmentAdrRangeBlocks        128
 137 #define MaxAreaRangeBlocks              4
 138
 139 static unsigned long iSeries_process_Regatta_mainstore_vpd(
 140                 struct MemoryBlock *mb_array, unsigned long max_entries)
 141 {
 142         struct IoHriMainStoreSegment5 *msVpdP =
 143                 (struct IoHriMainStoreSegment5 *)xMsVpd;
 144         unsigned long numSegmentBlocks = 0;
 145         u32 existsBits = msVpdP->msAreaExists;
 146         unsigned long area_num;
 147
 148         printk("Mainstore_VPD: Regatta\n");
 149
 150         for (area_num = 0; area_num < MaxSegmentAreas; ++area_num ) {
 151                 unsigned long numAreaBlocks;
 152                 struct IoHriMainStoreArea4 *currentArea;
 153
 154                 if (existsBits & 0x80000000) {
 155                         unsigned long block_num;
 156
 157                         currentArea = &msVpdP->msAreaArray[area_num];
 158                         numAreaBlocks = currentArea->numAdrRangeBlocks;
 159                         printk("ms_vpd: processing area %2ld  blocks=%ld",
 160                                         area_num, numAreaBlocks);
 161                         for (block_num = 0; block_num < numAreaBlocks;
 162                                         ++block_num ) {
 163                                 /* Process an address range block */
 164                                 struct MemoryBlock tempBlock;
 165                                 unsigned long i;
 166
 167                                 tempBlock.absStart =
 168                                         (unsigned long)currentArea->xAdrRangeBlock[block_num].blockStart;
 169                                 tempBlock.absEnd =
 170                                         (unsigned long)currentArea->xAdrRangeBlock[block_num].blockEnd;
 171                                 tempBlock.logicalStart = 0;
 172                                 tempBlock.logicalEnd   = 0;
 173                                 printk("\n          block %ld absStart=%016lx absEnd=%016lx",
 174                                                 block_num, tempBlock.absStart,
 175                                                 tempBlock.absEnd);
 176
 177                                 for (i = 0; i < numSegmentBlocks; ++i) {
 178                                         if (mb_array[i].absStart ==
 179                                                         tempBlock.absStart)
 180                                                 break;
 181                                 }
 182                                 if (i == numSegmentBlocks) {
 183                                         if (numSegmentBlocks == max_entries)
 184                                                 panic("iSeries_process_mainstore_vpd: too many memory blocks");
 185                                         mb_array[numSegmentBlocks] = tempBlock;
 186                                         ++numSegmentBlocks;
 187                                 } else
 188                                         printk(" (duplicate)");
 189                         }
 190                         printk("\n");
 191                 }
 192                 existsBits <<= 1;
 193         }
 194         /* Now sort the blocks found into ascending sequence */
 195         if (numSegmentBlocks > 1) {
 196                 unsigned long m, n;
 197
 198                 for (m = 0; m < numSegmentBlocks - 1; ++m) {
 199                         for (n = numSegmentBlocks - 1; m < n; --n) {
 200                                 if (mb_array[n].absStart <
 201                                                 mb_array[n-1].absStart) {
 202                                         struct MemoryBlock tempBlock;
 203
 204                                         tempBlock = mb_array[n];
 205                                         mb_array[n] = mb_array[n-1];
 206                                         mb_array[n-1] = tempBlock;
 207                                 }
 208                         }
 209                 }
 210         }
 211         /*
 212          * Assign "logical" addresses to each block.  These
 213          * addresses correspond to the hypervisor "bitmap" space.
 214          * Convert all addresses into units of 256K chunks.
 215          */
 216         {
 217         unsigned long i, nextBitmapAddress;
 218
 219         printk("ms_vpd: %ld sorted memory blocks\n", numSegmentBlocks);
 220         nextBitmapAddress = 0;
 221         for (i = 0; i < numSegmentBlocks; ++i) {
 222                 unsigned long length = mb_array[i].absEnd -
 223                         mb_array[i].absStart;
 224
 225                 mb_array[i].logicalStart = nextBitmapAddress;
 226                 mb_array[i].logicalEnd = nextBitmapAddress + length;
 227                 nextBitmapAddress += length;
 228                 printk("          Bitmap range: %016lx - %016lx\n"
 229                                 "        Absolute range: %016lx - %016lx\n",
 230                                 mb_array[i].logicalStart,
 231                                 mb_array[i].logicalEnd,
 232                                 mb_array[i].absStart, mb_array[i].absEnd);
 233                 mb_array[i].absStart = addr_to_chunk(mb_array[i].absStart &
 234                                 0x000fffffffffffffUL);
 235                 mb_array[i].absEnd = addr_to_chunk(mb_array[i].absEnd &
 236                                 0x000fffffffffffffUL);
 237                 mb_array[i].logicalStart =
 238                         addr_to_chunk(mb_array[i].logicalStart);
 239                 mb_array[i].logicalEnd = addr_to_chunk(mb_array[i].logicalEnd);
 240         }
 241         }
 242
 243         return numSegmentBlocks;
 244 }
 245
 246 static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
 247                 unsigned long max_entries)
 248 {
 249         unsigned long i;
 250         unsigned long mem_blocks = 0;
 251
 252         if (cpu_has_feature(CPU_FTR_SLB))
 253                 mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
 254                                 max_entries);
 255         else
 256                 mem_blocks = iSeries_process_Condor_mainstore_vpd(mb_array,
 257                                 max_entries);
 258
 259         printk("Mainstore_VPD: numMemoryBlocks = %ld \n", mem_blocks);
 260         for (i = 0; i < mem_blocks; ++i) {
 261                 printk("Mainstore_VPD: block %3ld logical chunks %016lx - %016lx\n"
 262                        "                             abs chunks %016lx - %016lx\n",
 263                         i, mb_array[i].logicalStart, mb_array[i].logicalEnd,
 264                         mb_array[i].absStart, mb_array[i].absEnd);
 265         }
 266         return mem_blocks;
 267 }
 268
 269 static void __init iSeries_get_cmdline(void)
 270 {
 271         char *p, *q;
 272
 273         /* copy the command line parameter from the primary VSP  */
 274         HvCallEvent_dmaToSp(cmd_line, 2 * 64* 1024, 256,
 275                         HvLpDma_Direction_RemoteToLocal);
 276
 277         p = cmd_line;
 278         q = cmd_line + 255;
 279         while(p < q) {
 280                 if (!*p || *p == '\n')
 281                         break;
 282                 ++p;
 283         }
 284         *p = 0;
 285 }
 286
 287 static void __init iSeries_init_early(void)
 288 {
 289         DBG(" -> iSeries_init_early()\n");
 290
 291         /* Snapshot the timebase, for use in later recalibration */
 292         iSeries_time_init_early();
 293
 294         /*
 295          * Initialize the DMA/TCE management
 296          */
 297         iommu_init_early_iSeries();
 298
 299         /* Initialize machine-dependency vectors */
 300 #ifdef CONFIG_SMP
 301         smp_init_iSeries();
 302 #endif
 303
 304         /* Associate Lp Event Queue 0 with processor 0 */
 305         HvCallEvent_setLpEventQueueInterruptProc(0, 0);
 306
 307         mf_init();
 308
 309         DBG(" <- iSeries_init_early()\n");
 310 }
 311
 312 struct mschunks_map mschunks_map = {
 313         /* XXX We don't use these, but Piranha might need them. */
 314         .chunk_size  = MSCHUNKS_CHUNK_SIZE,
 315         .chunk_shift = MSCHUNKS_CHUNK_SHIFT,
 316         .chunk_mask  = MSCHUNKS_OFFSET_MASK,
 317 };
 318 EXPORT_SYMBOL(mschunks_map);
 319
 320 static void mschunks_alloc(unsigned long num_chunks)
 321 {
 322         klimit = _ALIGN(klimit, sizeof(u32));
 323         mschunks_map.mapping = (u32 *)klimit;
 324         klimit += num_chunks * sizeof(u32);
 325         mschunks_map.num_chunks = num_chunks;
 326 }
 327
 328 /*
 329  * The iSeries may have very large memories ( > 128 GB ) and a partition
 330  * may get memory in "chunks" that may be anywhere in the 2**52 real
 331  * address space.  The chunks are 256K in size.  To map this to the
 332  * memory model Linux expects, the AS/400 specific code builds a
 333  * translation table to translate what Linux thinks are "physical"
 334  * addresses to the actual real addresses.  This allows us to make
 335  * it appear to Linux that we have contiguous memory starting at
 336  * physical address zero while in fact this could be far from the truth.
 337  * To avoid confusion, I'll let the words physical and/or real address
 338  * apply to the Linux addresses while I'll use "absolute address" to
 339  * refer to the actual hardware real address.
 340  *
 341  * build_iSeries_Memory_Map gets information from the Hypervisor and
 342  * looks at the Main Store VPD to determine the absolute addresses
 343  * of the memory that has been assigned to our partition and builds
 344  * a table used to translate Linux's physical addresses to these
 345  * absolute addresses.  Absolute addresses are needed when
 346  * communicating with the hypervisor (e.g. to build HPT entries)
 347  *
 348  * Returns the physical memory size
 349  */
 350
 351 static unsigned long __init build_iSeries_Memory_Map(void)
 352 {
 353         u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
 354         u32 nextPhysChunk;
 355         u32 hptFirstChunk, hptLastChunk, hptSizeChunks, hptSizePages;
 356         u32 totalChunks,moreChunks;
 357         u32 currChunk, thisChunk, absChunk;
 358         u32 currDword;
 359         u32 chunkBit;
 360         u64 map;
 361         struct MemoryBlock mb[32];
 362         unsigned long numMemoryBlocks, curBlock;
 363
 364         /* Chunk size on iSeries is 256K bytes */
 365         totalChunks = (u32)HvLpConfig_getMsChunks();
 366         mschunks_alloc(totalChunks);
 367
 368         /*
 369          * Get absolute address of our load area
 370          * and map it to physical address 0
 371          * This guarantees that the loadarea ends up at physical 0
 372          * otherwise, it might not be returned by PLIC as the first
 373          * chunks
 374          */
 375
 376         loadAreaFirstChunk = (u32)addr_to_chunk(itLpNaca.xLoadAreaAddr);
 377         loadAreaSize =  itLpNaca.xLoadAreaChunks;
 378
 379         /*
 380          * Only add the pages already mapped here.
 381          * Otherwise we might add the hpt pages
 382          * The rest of the pages of the load area
 383          * aren't in the HPT yet and can still
 384          * be assigned an arbitrary physical address
 385          */
 386         if ((loadAreaSize * 64) > HvPagesToMap)
 387                 loadAreaSize = HvPagesToMap / 64;
 388
 389         loadAreaLastChunk = loadAreaFirstChunk + loadAreaSize - 1;
 390
 391         /*
 392          * TODO Do we need to do something if the HPT is in the 64MB load area?
 393          * This would be required if the itLpNaca.xLoadAreaChunks includes
 394          * the HPT size
 395          */
 396
 397         printk("Mapping load area - physical addr = 0000000000000000\n"
 398                 "                    absolute addr = %016lx\n",
 399                 chunk_to_addr(loadAreaFirstChunk));
 400         printk("Load area size %dK\n", loadAreaSize * 256);
 401
 402         for (nextPhysChunk = 0; nextPhysChunk < loadAreaSize; ++nextPhysChunk)
 403                 mschunks_map.mapping[nextPhysChunk] =
 404                         loadAreaFirstChunk + nextPhysChunk;
 405
 406         /*
 407          * Get absolute address of our HPT and remember it so
 408          * we won't map it to any physical address
 409          */
 410         hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
 411         hptSizePages = (u32)HvCallHpt_getHptPages();
 412         hptSizeChunks = hptSizePages >>
 413                 (MSCHUNKS_CHUNK_SHIFT - HW_PAGE_SHIFT);
 414         hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
 415
 416         printk("HPT absolute addr = %016lx, size = %dK\n",
 417                         chunk_to_addr(hptFirstChunk), hptSizeChunks * 256);
 418
 419         /*
 420          * Determine if absolute memory has any
 421          * holes so that we can interpret the
 422          * access map we get back from the hypervisor
 423          * correctly.
 424          */
 425         numMemoryBlocks = iSeries_process_mainstore_vpd(mb, 32);
 426
 427         /*
 428          * Process the main store access map from the hypervisor
 429          * to build up our physical -> absolute translation table
 430          */
 431         curBlock = 0;
 432         currChunk = 0;
 433         currDword = 0;
 434         moreChunks = totalChunks;
 435
 436         while (moreChunks) {
 437                 map = HvCallSm_get64BitsOfAccessMap(itLpNaca.xLpIndex,
 438                                 currDword);
 439                 thisChunk = currChunk;
 440                 while (map) {
 441                         chunkBit = map >> 63;
 442                         map <<= 1;
 443                         if (chunkBit) {
 444                                 --moreChunks;
 445                                 while (thisChunk >= mb[curBlock].logicalEnd) {
 446                                         ++curBlock;
 447                                         if (curBlock >= numMemoryBlocks)
 448                                                 panic("out of memory blocks");
 449                                 }
 450                                 if (thisChunk < mb[curBlock].logicalStart)
 451                                         panic("memory block error");
 452
 453                                 absChunk = mb[curBlock].absStart +
 454                                         (thisChunk - mb[curBlock].logicalStart);
 455                                 if (((absChunk < hptFirstChunk) ||
 456                                      (absChunk > hptLastChunk)) &&
 457                                     ((absChunk < loadAreaFirstChunk) ||
 458                                      (absChunk > loadAreaLastChunk))) {
 459                                         mschunks_map.mapping[nextPhysChunk] =
 460                                                 absChunk;
 461                                         ++nextPhysChunk;
 462                                 }
 463                         }
 464                         ++thisChunk;
 465                 }
 466                 ++currDword;
 467                 currChunk += 64;
 468         }
 469
 470         /*
 471          * main store size (in chunks) is
 472          *   totalChunks - hptSizeChunks
 473          * which should be equal to
 474          *   nextPhysChunk
 475          */
 476         return chunk_to_addr(nextPhysChunk);
 477 }
 478
 479 /*
 480  * Document me.
 481  */
 482 static void __init iSeries_setup_arch(void)
 483 {
 484         if (get_lppaca()->shared_proc) {
 485                 ppc_md.idle_loop = iseries_shared_idle;
 486                 printk(KERN_DEBUG "Using shared processor idle loop\n");
 487         } else {
 488                 ppc_md.idle_loop = iseries_dedicated_idle;
 489                 printk(KERN_DEBUG "Using dedicated idle loop\n");
 490         }
 491
 492         /* Setup the Lp Event Queue */
 493         setup_hvlpevent_queue();
 494
 495         printk("Max  logical processors = %d\n",
 496                         itVpdAreas.xSlicMaxLogicalProcs);
 497         printk("Max physical processors = %d\n",
 498                         itVpdAreas.xSlicMaxPhysicalProcs);
 499
 500         iSeries_pcibios_init();
 501 }
 502
 503 static void iSeries_show_cpuinfo(struct seq_file *m)
 504 {
 505         seq_printf(m, "machine\t\t: 64-bit iSeries Logical Partition\n");
 506 }
 507
 508 static void __init iSeries_progress(char * st, unsigned short code)
 509 {
 510         printk("Progress: [%04x] - %s\n", (unsigned)code, st);
 511         mf_display_progress(code);
 512 }
 513
 514 static void __init iSeries_fixup_klimit(void)
 515 {
 516         /*
 517          * Change klimit to take into account any ram disk
 518          * that may be included
 519          */
 520         if (naca.xRamDisk)
 521                 klimit = KERNELBASE + (u64)naca.xRamDisk +
 522                         (naca.xRamDiskSize * HW_PAGE_SIZE);
 523 }
 524
 525 static int __init iSeries_src_init(void)
 526 {
 527         /* clear the progress line */
 528         if (firmware_has_feature(FW_FEATURE_ISERIES))
 529                 ppc_md.progress(" ", 0xffff);
 530         return 0;
 531 }
 532
 533 late_initcall(iSeries_src_init);
 534
 535 static inline void process_iSeries_events(void)
 536 {
 537         asm volatile ("li 0,0x5555; sc" : : : "r0", "r3");
 538 }
 539
 540 static void yield_shared_processor(void)
 541 {
 542         unsigned long tb;
 543
 544         HvCall_setEnabledInterrupts(HvCall_MaskIPI |
 545                                     HvCall_MaskLpEvent |
 546                                     HvCall_MaskLpProd |
 547                                     HvCall_MaskTimeout);
 548
 549         tb = get_tb();
 550         /* Compute future tb value when yield should expire */
 551         HvCall_yieldProcessor(HvCall_YieldTimed, tb+tb_ticks_per_jiffy);
 552
 553         /*
 554          * The decrementer stops during the yield.  Force a fake decrementer
 555          * here and let the timer_interrupt code sort out the actual time.
 556          */
 557         get_lppaca()->int_dword.fields.decr_int = 1;
 558         ppc64_runlatch_on();
 559         process_iSeries_events();
 560 }
 561
 562 static void iseries_shared_idle(void)
 563 {
 564         while (1) {
 565                 tick_nohz_stop_sched_tick(1);
 566                 while (!need_resched() && !hvlpevent_is_pending()) {
 567                         local_irq_disable();
 568                         ppc64_runlatch_off();
 569
 570                         /* Recheck with irqs off */
 571                         if (!need_resched() && !hvlpevent_is_pending())
 572                                 yield_shared_processor();
 573
 574                         HMT_medium();
 575                         local_irq_enable();
 576                 }
 577
 578                 ppc64_runlatch_on();
 579                 tick_nohz_restart_sched_tick();
 580
 581                 if (hvlpevent_is_pending())
 582                         process_iSeries_events();
 583
 584                 preempt_enable_no_resched();
 585                 schedule();
 586                 preempt_disable();
 587         }
 588 }
 589
 590 static void iseries_dedicated_idle(void)
 591 {
 592         set_thread_flag(TIF_POLLING_NRFLAG);
 593
 594         while (1) {
 595                 tick_nohz_stop_sched_tick(1);
 596                 if (!need_resched()) {
 597                         while (!need_resched()) {
 598                                 ppc64_runlatch_off();
 599                                 HMT_low();
 600
 601                                 if (hvlpevent_is_pending()) {
 602                                         HMT_medium();
 603                                         ppc64_runlatch_on();
 604                                         process_iSeries_events();
 605                                 }
 606                         }
 607
 608                         HMT_medium();
 609                 }
 610
 611                 ppc64_runlatch_on();
 612                 tick_nohz_restart_sched_tick();
 613                 preempt_enable_no_resched();
 614                 schedule();
 615                 preempt_disable();
 616         }
 617 }
 618
 619 static void __iomem *iseries_ioremap(phys_addr_t address, unsigned long size,
 620                                      unsigned long flags, void *caller)
 621 {
 622         return (void __iomem *)address;
 623 }
 624
 625 static void iseries_iounmap(volatile void __iomem *token)
 626 {
 627 }
 628
 629 static int __init iseries_probe(void)
 630 {
 631         unsigned long root = of_get_flat_dt_root();
 632         if (!of_flat_dt_is_compatible(root, "IBM,iSeries"))
 633                 return 0;
 634
 635         hpte_init_iSeries();
 636         /* iSeries does not support 16M pages */
 637         cur_cpu_spec->cpu_features &= ~CPU_FTR_16M_PAGE;
 638
 639         return 1;
 640 }
 641
 642 #ifdef CONFIG_KEXEC
 643 static int iseries_kexec_prepare(struct kimage *image)
 644 {
 645         return -ENOSYS;
 646 }
 647 #endif
 648
 649 define_machine(iseries) {
 650         .name                   = "iSeries",
 651         .setup_arch             = iSeries_setup_arch,
 652         .show_cpuinfo           = iSeries_show_cpuinfo,
 653         .init_IRQ               = iSeries_init_IRQ,
 654         .get_irq                = iSeries_get_irq,
 655         .init_early             = iSeries_init_early,
 656         .pcibios_fixup          = iSeries_pci_final_fixup,
 657         .pcibios_fixup_resources= iSeries_pcibios_fixup_resources,
 658         .restart                = mf_reboot,
 659         .power_off              = mf_power_off,
 660         .halt                   = mf_power_off,
 661         .get_boot_time          = iSeries_get_boot_time,
 662         .set_rtc_time           = iSeries_set_rtc_time,
 663         .get_rtc_time           = iSeries_get_rtc_time,
 664         .calibrate_decr         = generic_calibrate_decr,
 665         .progress               = iSeries_progress,
 666         .probe                  = iseries_probe,
 667         .ioremap                = iseries_ioremap,
 668         .iounmap                = iseries_iounmap,
 669 #ifdef CONFIG_KEXEC
 670         .machine_kexec_prepare  = iseries_kexec_prepare,
 671 #endif
 672         /* XXX Implement enable_pmcs for iSeries */
 673 };
 674
 675 void * __init iSeries_early_setup(void)
 676 {
 677         unsigned long phys_mem_size;
 678
 679         /* Identify CPU type. This is done again by the common code later
 680          * on but calling this function multiple times is fine.
 681          */
 682         identify_cpu(0, mfspr(SPRN_PVR));
 683
 684         powerpc_firmware_features |= FW_FEATURE_ISERIES;
 685         powerpc_firmware_features |= FW_FEATURE_LPAR;
 686
 687         iSeries_fixup_klimit();
 688
 689         /*
 690          * Initialize the table which translate Linux physical addresses to
 691          * AS/400 absolute addresses
 692          */
 693         phys_mem_size = build_iSeries_Memory_Map();
 694
 695         iSeries_get_cmdline();
 696
 697         return (void *) __pa(build_flat_dt(phys_mem_size));
 698 }
 699
 700 static void hvputc(char c)
 701 {
 702         if (c == '\n')
 703                 hvputc('\r');
 704
 705         HvCall_writeLogBuffer(&c, 1);
 706 }
 707
 708 void __init udbg_init_iseries(void)
 709 {
 710         udbg_putc = hvputc;
 711 }