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/config.h>
  20 #include <linux/init.h>
  21 #include <linux/threads.h>
  22 #include <linux/smp.h>
  23 #include <linux/param.h>
  24 #include <linux/string.h>
  25 #include <linux/initrd.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/kdev_t.h>
  28 #include <linux/major.h>
  29 #include <linux/root_dev.h>
  30 #include <linux/kernel.h>
  31 #include <linux/if_ether.h>     /* ETH_ALEN */
  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/sections.h>
  48 #include <asm/abs_addr.h>
  49 #include <asm/iseries/hv_types.h>
  50 #include <asm/iseries/hv_lp_config.h>
  51 #include <asm/iseries/hv_call_event.h>
  52 #include <asm/iseries/hv_call_xm.h>
  53 #include <asm/iseries/it_lp_queue.h>
  54 #include <asm/iseries/mf.h>
  55 #include <asm/iseries/it_exp_vpd_panel.h>
  56 #include <asm/iseries/hv_lp_event.h>
  57 #include <asm/iseries/lpar_map.h>
  58 #include <asm/udbg.h>
  59 #include <asm/irq.h>
  60
  61 #include "naca.h"
  62 #include "setup.h"
  63 #include "irq.h"
  64 #include "vpd_areas.h"
  65 #include "processor_vpd.h"
  66 #include "main_store.h"
  67 #include "call_sm.h"
  68 #include "call_hpt.h"
  69
  70 #ifdef DEBUG
  71 #define DBG(fmt...) udbg_printf(fmt)
  72 #else
  73 #define DBG(fmt...)
  74 #endif
  75
  76 /* Function Prototypes */
  77 static unsigned long build_iSeries_Memory_Map(void);
  78 static void iseries_shared_idle(void);
  79 static void iseries_dedicated_idle(void);
  80 #ifdef CONFIG_PCI
  81 extern void iSeries_pci_final_fixup(void);
  82 #else
  83 static void iSeries_pci_final_fixup(void) { }
  84 #endif
  85
  86 extern int rd_size;             /* Defined in drivers/block/rd.c */
  87 extern unsigned long embedded_sysmap_start;
  88 extern unsigned long embedded_sysmap_end;
  89
  90 extern unsigned long iSeries_recal_tb;
  91 extern unsigned long iSeries_recal_titan;
  92
  93 static unsigned long cmd_mem_limit;
  94
  95 struct MemoryBlock {
  96         unsigned long absStart;
  97         unsigned long absEnd;
  98         unsigned long logicalStart;
  99         unsigned long logicalEnd;
 100 };
 101
 102 /*
 103  * Process the main store vpd to determine where the holes in memory are
 104  * and return the number of physical blocks and fill in the array of
 105  * block data.
 106  */
 107 static unsigned long iSeries_process_Condor_mainstore_vpd(
 108                 struct MemoryBlock *mb_array, unsigned long max_entries)
 109 {
 110         unsigned long holeFirstChunk, holeSizeChunks;
 111         unsigned long numMemoryBlocks = 1;
 112         struct IoHriMainStoreSegment4 *msVpd =
 113                 (struct IoHriMainStoreSegment4 *)xMsVpd;
 114         unsigned long holeStart = msVpd->nonInterleavedBlocksStartAdr;
 115         unsigned long holeEnd = msVpd->nonInterleavedBlocksEndAdr;
 116         unsigned long holeSize = holeEnd - holeStart;
 117
 118         printk("Mainstore_VPD: Condor\n");
 119         /*
 120          * Determine if absolute memory has any
 121          * holes so that we can interpret the
 122          * access map we get back from the hypervisor
 123          * correctly.
 124          */
 125         mb_array[0].logicalStart = 0;
 126         mb_array[0].logicalEnd = 0x100000000;
 127         mb_array[0].absStart = 0;
 128         mb_array[0].absEnd = 0x100000000;
 129
 130         if (holeSize) {
 131                 numMemoryBlocks = 2;
 132                 holeStart = holeStart & 0x000fffffffffffff;
 133                 holeStart = addr_to_chunk(holeStart);
 134                 holeFirstChunk = holeStart;
 135                 holeSize = addr_to_chunk(holeSize);
 136                 holeSizeChunks = holeSize;
 137                 printk( "Main store hole: start chunk = %0lx, size = %0lx chunks\n",
 138                                 holeFirstChunk, holeSizeChunks );
 139                 mb_array[0].logicalEnd = holeFirstChunk;
 140                 mb_array[0].absEnd = holeFirstChunk;
 141                 mb_array[1].logicalStart = holeFirstChunk;
 142                 mb_array[1].logicalEnd = 0x100000000 - holeSizeChunks;
 143                 mb_array[1].absStart = holeFirstChunk + holeSizeChunks;
 144                 mb_array[1].absEnd = 0x100000000;
 145         }
 146         return numMemoryBlocks;
 147 }
 148
 149 #define MaxSegmentAreas                 32
 150 #define MaxSegmentAdrRangeBlocks        128
 151 #define MaxAreaRangeBlocks              4
 152
 153 static unsigned long iSeries_process_Regatta_mainstore_vpd(
 154                 struct MemoryBlock *mb_array, unsigned long max_entries)
 155 {
 156         struct IoHriMainStoreSegment5 *msVpdP =
 157                 (struct IoHriMainStoreSegment5 *)xMsVpd;
 158         unsigned long numSegmentBlocks = 0;
 159         u32 existsBits = msVpdP->msAreaExists;
 160         unsigned long area_num;
 161
 162         printk("Mainstore_VPD: Regatta\n");
 163
 164         for (area_num = 0; area_num < MaxSegmentAreas; ++area_num ) {
 165                 unsigned long numAreaBlocks;
 166                 struct IoHriMainStoreArea4 *currentArea;
 167
 168                 if (existsBits & 0x80000000) {
 169                         unsigned long block_num;
 170
 171                         currentArea = &msVpdP->msAreaArray[area_num];
 172                         numAreaBlocks = currentArea->numAdrRangeBlocks;
 173                         printk("ms_vpd: processing area %2ld  blocks=%ld",
 174                                         area_num, numAreaBlocks);
 175                         for (block_num = 0; block_num < numAreaBlocks;
 176                                         ++block_num ) {
 177                                 /* Process an address range block */
 178                                 struct MemoryBlock tempBlock;
 179                                 unsigned long i;
 180
 181                                 tempBlock.absStart =
 182                                         (unsigned long)currentArea->xAdrRangeBlock[block_num].blockStart;
 183                                 tempBlock.absEnd =
 184                                         (unsigned long)currentArea->xAdrRangeBlock[block_num].blockEnd;
 185                                 tempBlock.logicalStart = 0;
 186                                 tempBlock.logicalEnd   = 0;
 187                                 printk("\n          block %ld absStart=%016lx absEnd=%016lx",
 188                                                 block_num, tempBlock.absStart,
 189                                                 tempBlock.absEnd);
 190
 191                                 for (i = 0; i < numSegmentBlocks; ++i) {
 192                                         if (mb_array[i].absStart ==
 193                                                         tempBlock.absStart)
 194                                                 break;
 195                                 }
 196                                 if (i == numSegmentBlocks) {
 197                                         if (numSegmentBlocks == max_entries)
 198                                                 panic("iSeries_process_mainstore_vpd: too many memory blocks");
 199                                         mb_array[numSegmentBlocks] = tempBlock;
 200                                         ++numSegmentBlocks;
 201                                 } else
 202                                         printk(" (duplicate)");
 203                         }
 204                         printk("\n");
 205                 }
 206                 existsBits <<= 1;
 207         }
 208         /* Now sort the blocks found into ascending sequence */
 209         if (numSegmentBlocks > 1) {
 210                 unsigned long m, n;
 211
 212                 for (m = 0; m < numSegmentBlocks - 1; ++m) {
 213                         for (n = numSegmentBlocks - 1; m < n; --n) {
 214                                 if (mb_array[n].absStart <
 215                                                 mb_array[n-1].absStart) {
 216                                         struct MemoryBlock tempBlock;
 217
 218                                         tempBlock = mb_array[n];
 219                                         mb_array[n] = mb_array[n-1];
 220                                         mb_array[n-1] = tempBlock;
 221                                 }
 222                         }
 223                 }
 224         }
 225         /*
 226          * Assign "logical" addresses to each block.  These
 227          * addresses correspond to the hypervisor "bitmap" space.
 228          * Convert all addresses into units of 256K chunks.
 229          */
 230         {
 231         unsigned long i, nextBitmapAddress;
 232
 233         printk("ms_vpd: %ld sorted memory blocks\n", numSegmentBlocks);
 234         nextBitmapAddress = 0;
 235         for (i = 0; i < numSegmentBlocks; ++i) {
 236                 unsigned long length = mb_array[i].absEnd -
 237                         mb_array[i].absStart;
 238
 239                 mb_array[i].logicalStart = nextBitmapAddress;
 240                 mb_array[i].logicalEnd = nextBitmapAddress + length;
 241                 nextBitmapAddress += length;
 242                 printk("          Bitmap range: %016lx - %016lx\n"
 243                                 "        Absolute range: %016lx - %016lx\n",
 244                                 mb_array[i].logicalStart,
 245                                 mb_array[i].logicalEnd,
 246                                 mb_array[i].absStart, mb_array[i].absEnd);
 247                 mb_array[i].absStart = addr_to_chunk(mb_array[i].absStart &
 248                                 0x000fffffffffffff);
 249                 mb_array[i].absEnd = addr_to_chunk(mb_array[i].absEnd &
 250                                 0x000fffffffffffff);
 251                 mb_array[i].logicalStart =
 252                         addr_to_chunk(mb_array[i].logicalStart);
 253                 mb_array[i].logicalEnd = addr_to_chunk(mb_array[i].logicalEnd);
 254         }
 255         }
 256
 257         return numSegmentBlocks;
 258 }
 259
 260 static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
 261                 unsigned long max_entries)
 262 {
 263         unsigned long i;
 264         unsigned long mem_blocks = 0;
 265
 266         if (cpu_has_feature(CPU_FTR_SLB))
 267                 mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
 268                                 max_entries);
 269         else
 270                 mem_blocks = iSeries_process_Condor_mainstore_vpd(mb_array,
 271                                 max_entries);
 272
 273         printk("Mainstore_VPD: numMemoryBlocks = %ld \n", mem_blocks);
 274         for (i = 0; i < mem_blocks; ++i) {
 275                 printk("Mainstore_VPD: block %3ld logical chunks %016lx - %016lx\n"
 276                        "                             abs chunks %016lx - %016lx\n",
 277                         i, mb_array[i].logicalStart, mb_array[i].logicalEnd,
 278                         mb_array[i].absStart, mb_array[i].absEnd);
 279         }
 280         return mem_blocks;
 281 }
 282
 283 static void __init iSeries_get_cmdline(void)
 284 {
 285         char *p, *q;
 286
 287         /* copy the command line parameter from the primary VSP  */
 288         HvCallEvent_dmaToSp(cmd_line, 2 * 64* 1024, 256,
 289                         HvLpDma_Direction_RemoteToLocal);
 290
 291         p = cmd_line;
 292         q = cmd_line + 255;
 293         while(p < q) {
 294                 if (!*p || *p == '\n')
 295                         break;
 296                 ++p;
 297         }
 298         *p = 0;
 299 }
 300
 301 static void __init iSeries_init_early(void)
 302 {
 303         DBG(" -> iSeries_init_early()\n");
 304
 305         ppc64_interrupt_controller = IC_ISERIES;
 306
 307 #if defined(CONFIG_BLK_DEV_INITRD)
 308         /*
 309          * If the init RAM disk has been configured and there is
 310          * a non-zero starting address for it, set it up
 311          */
 312         if (naca.xRamDisk) {
 313                 initrd_start = (unsigned long)__va(naca.xRamDisk);
 314                 initrd_end = initrd_start + naca.xRamDiskSize * HW_PAGE_SIZE;
 315                 initrd_below_start_ok = 1;      // ramdisk in kernel space
 316                 ROOT_DEV = Root_RAM0;
 317                 if (((rd_size * 1024) / HW_PAGE_SIZE) < naca.xRamDiskSize)
 318                         rd_size = (naca.xRamDiskSize * HW_PAGE_SIZE) / 1024;
 319         } else
 320 #endif /* CONFIG_BLK_DEV_INITRD */
 321         {
 322             /* ROOT_DEV = MKDEV(VIODASD_MAJOR, 1); */
 323         }
 324
 325         iSeries_recal_tb = get_tb();
 326         iSeries_recal_titan = HvCallXm_loadTod();
 327
 328         /*
 329          * Initialize the hash table management pointers
 330          */
 331         hpte_init_iSeries();
 332
 333         /*
 334          * Initialize the DMA/TCE management
 335          */
 336         iommu_init_early_iSeries();
 337
 338         /* Initialize machine-dependency vectors */
 339 #ifdef CONFIG_SMP
 340         smp_init_iSeries();
 341 #endif
 342
 343         /* Associate Lp Event Queue 0 with processor 0 */
 344         HvCallEvent_setLpEventQueueInterruptProc(0, 0);
 345
 346         mf_init();
 347
 348         /* If we were passed an initrd, set the ROOT_DEV properly if the values
 349          * look sensible. If not, clear initrd reference.
 350          */
 351 #ifdef CONFIG_BLK_DEV_INITRD
 352         if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
 353             initrd_end > initrd_start)
 354                 ROOT_DEV = Root_RAM0;
 355         else
 356                 initrd_start = initrd_end = 0;
 357 #endif /* CONFIG_BLK_DEV_INITRD */
 358
 359         DBG(" <- iSeries_init_early()\n");
 360 }
 361
 362 struct mschunks_map mschunks_map = {
 363         /* XXX We don't use these, but Piranha might need them. */
 364         .chunk_size  = MSCHUNKS_CHUNK_SIZE,
 365         .chunk_shift = MSCHUNKS_CHUNK_SHIFT,
 366         .chunk_mask  = MSCHUNKS_OFFSET_MASK,
 367 };
 368 EXPORT_SYMBOL(mschunks_map);
 369
 370 void mschunks_alloc(unsigned long num_chunks)
 371 {
 372         klimit = _ALIGN(klimit, sizeof(u32));
 373         mschunks_map.mapping = (u32 *)klimit;
 374         klimit += num_chunks * sizeof(u32);
 375         mschunks_map.num_chunks = num_chunks;
 376 }
 377
 378 /*
 379  * The iSeries may have very large memories ( > 128 GB ) and a partition
 380  * may get memory in "chunks" that may be anywhere in the 2**52 real
 381  * address space.  The chunks are 256K in size.  To map this to the
 382  * memory model Linux expects, the AS/400 specific code builds a
 383  * translation table to translate what Linux thinks are "physical"
 384  * addresses to the actual real addresses.  This allows us to make
 385  * it appear to Linux that we have contiguous memory starting at
 386  * physical address zero while in fact this could be far from the truth.
 387  * To avoid confusion, I'll let the words physical and/or real address
 388  * apply to the Linux addresses while I'll use "absolute address" to
 389  * refer to the actual hardware real address.
 390  *
 391  * build_iSeries_Memory_Map gets information from the Hypervisor and
 392  * looks at the Main Store VPD to determine the absolute addresses
 393  * of the memory that has been assigned to our partition and builds
 394  * a table used to translate Linux's physical addresses to these
 395  * absolute addresses.  Absolute addresses are needed when
 396  * communicating with the hypervisor (e.g. to build HPT entries)
 397  *
 398  * Returns the physical memory size
 399  */
 400
 401 static unsigned long __init build_iSeries_Memory_Map(void)
 402 {
 403         u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
 404         u32 nextPhysChunk;
 405         u32 hptFirstChunk, hptLastChunk, hptSizeChunks, hptSizePages;
 406         u32 totalChunks,moreChunks;
 407         u32 currChunk, thisChunk, absChunk;
 408         u32 currDword;
 409         u32 chunkBit;
 410         u64 map;
 411         struct MemoryBlock mb[32];
 412         unsigned long numMemoryBlocks, curBlock;
 413
 414         /* Chunk size on iSeries is 256K bytes */
 415         totalChunks = (u32)HvLpConfig_getMsChunks();
 416         mschunks_alloc(totalChunks);
 417
 418         /*
 419          * Get absolute address of our load area
 420          * and map it to physical address 0
 421          * This guarantees that the loadarea ends up at physical 0
 422          * otherwise, it might not be returned by PLIC as the first
 423          * chunks
 424          */
 425
 426         loadAreaFirstChunk = (u32)addr_to_chunk(itLpNaca.xLoadAreaAddr);
 427         loadAreaSize =  itLpNaca.xLoadAreaChunks;
 428
 429         /*
 430          * Only add the pages already mapped here.
 431          * Otherwise we might add the hpt pages
 432          * The rest of the pages of the load area
 433          * aren't in the HPT yet and can still
 434          * be assigned an arbitrary physical address
 435          */
 436         if ((loadAreaSize * 64) > HvPagesToMap)
 437                 loadAreaSize = HvPagesToMap / 64;
 438
 439         loadAreaLastChunk = loadAreaFirstChunk + loadAreaSize - 1;
 440
 441         /*
 442          * TODO Do we need to do something if the HPT is in the 64MB load area?
 443          * This would be required if the itLpNaca.xLoadAreaChunks includes
 444          * the HPT size
 445          */
 446
 447         printk("Mapping load area - physical addr = 0000000000000000\n"
 448                 "                    absolute addr = %016lx\n",
 449                 chunk_to_addr(loadAreaFirstChunk));
 450         printk("Load area size %dK\n", loadAreaSize * 256);
 451
 452         for (nextPhysChunk = 0; nextPhysChunk < loadAreaSize; ++nextPhysChunk)
 453                 mschunks_map.mapping[nextPhysChunk] =
 454                         loadAreaFirstChunk + nextPhysChunk;
 455
 456         /*
 457          * Get absolute address of our HPT and remember it so
 458          * we won't map it to any physical address
 459          */
 460         hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
 461         hptSizePages = (u32)HvCallHpt_getHptPages();
 462         hptSizeChunks = hptSizePages >>
 463                 (MSCHUNKS_CHUNK_SHIFT - HW_PAGE_SHIFT);
 464         hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
 465
 466         printk("HPT absolute addr = %016lx, size = %dK\n",
 467                         chunk_to_addr(hptFirstChunk), hptSizeChunks * 256);
 468
 469         /*
 470          * Determine if absolute memory has any
 471          * holes so that we can interpret the
 472          * access map we get back from the hypervisor
 473          * correctly.
 474          */
 475         numMemoryBlocks = iSeries_process_mainstore_vpd(mb, 32);
 476
 477         /*
 478          * Process the main store access map from the hypervisor
 479          * to build up our physical -> absolute translation table
 480          */
 481         curBlock = 0;
 482         currChunk = 0;
 483         currDword = 0;
 484         moreChunks = totalChunks;
 485
 486         while (moreChunks) {
 487                 map = HvCallSm_get64BitsOfAccessMap(itLpNaca.xLpIndex,
 488                                 currDword);
 489                 thisChunk = currChunk;
 490                 while (map) {
 491                         chunkBit = map >> 63;
 492                         map <<= 1;
 493                         if (chunkBit) {
 494                                 --moreChunks;
 495                                 while (thisChunk >= mb[curBlock].logicalEnd) {
 496                                         ++curBlock;
 497                                         if (curBlock >= numMemoryBlocks)
 498                                                 panic("out of memory blocks");
 499                                 }
 500                                 if (thisChunk < mb[curBlock].logicalStart)
 501                                         panic("memory block error");
 502
 503                                 absChunk = mb[curBlock].absStart +
 504                                         (thisChunk - mb[curBlock].logicalStart);
 505                                 if (((absChunk < hptFirstChunk) ||
 506                                      (absChunk > hptLastChunk)) &&
 507                                     ((absChunk < loadAreaFirstChunk) ||
 508                                      (absChunk > loadAreaLastChunk))) {
 509                                         mschunks_map.mapping[nextPhysChunk] =
 510                                                 absChunk;
 511                                         ++nextPhysChunk;
 512                                 }
 513                         }
 514                         ++thisChunk;
 515                 }
 516                 ++currDword;
 517                 currChunk += 64;
 518         }
 519
 520         /*
 521          * main store size (in chunks) is
 522          *   totalChunks - hptSizeChunks
 523          * which should be equal to
 524          *   nextPhysChunk
 525          */
 526         return chunk_to_addr(nextPhysChunk);
 527 }
 528
 529 /*
 530  * Document me.
 531  */
 532 static void __init iSeries_setup_arch(void)
 533 {
 534         if (get_lppaca()->shared_proc) {
 535                 ppc_md.idle_loop = iseries_shared_idle;
 536                 printk(KERN_DEBUG "Using shared processor idle loop\n");
 537         } else {
 538                 ppc_md.idle_loop = iseries_dedicated_idle;
 539                 printk(KERN_DEBUG "Using dedicated idle loop\n");
 540         }
 541
 542         /* Setup the Lp Event Queue */
 543         setup_hvlpevent_queue();
 544
 545         printk("Max  logical processors = %d\n",
 546                         itVpdAreas.xSlicMaxLogicalProcs);
 547         printk("Max physical processors = %d\n",
 548                         itVpdAreas.xSlicMaxPhysicalProcs);
 549 }
 550
 551 static void iSeries_show_cpuinfo(struct seq_file *m)
 552 {
 553         seq_printf(m, "machine\t\t: 64-bit iSeries Logical Partition\n");
 554 }
 555
 556 static void __init iSeries_progress(char * st, unsigned short code)
 557 {
 558         printk("Progress: [%04x] - %s\n", (unsigned)code, st);
 559         mf_display_progress(code);
 560 }
 561
 562 static void __init iSeries_fixup_klimit(void)
 563 {
 564         /*
 565          * Change klimit to take into account any ram disk
 566          * that may be included
 567          */
 568         if (naca.xRamDisk)
 569                 klimit = KERNELBASE + (u64)naca.xRamDisk +
 570                         (naca.xRamDiskSize * HW_PAGE_SIZE);
 571         else {
 572                 /*
 573                  * No ram disk was included - check and see if there
 574                  * was an embedded system map.  Change klimit to take
 575                  * into account any embedded system map
 576                  */
 577                 if (embedded_sysmap_end)
 578                         klimit = KERNELBASE + ((embedded_sysmap_end + 4095) &
 579                                         0xfffffffffffff000);
 580         }
 581 }
 582
 583 static int __init iSeries_src_init(void)
 584 {
 585         /* clear the progress line */
 586         ppc_md.progress(" ", 0xffff);
 587         return 0;
 588 }
 589
 590 late_initcall(iSeries_src_init);
 591
 592 static inline void process_iSeries_events(void)
 593 {
 594         asm volatile ("li 0,0x5555; sc" : : : "r0", "r3");
 595 }
 596
 597 static void yield_shared_processor(void)
 598 {
 599         unsigned long tb;
 600
 601         HvCall_setEnabledInterrupts(HvCall_MaskIPI |
 602                                     HvCall_MaskLpEvent |
 603                                     HvCall_MaskLpProd |
 604                                     HvCall_MaskTimeout);
 605
 606         tb = get_tb();
 607         /* Compute future tb value when yield should expire */
 608         HvCall_yieldProcessor(HvCall_YieldTimed, tb+tb_ticks_per_jiffy);
 609
 610         /*
 611          * The decrementer stops during the yield.  Force a fake decrementer
 612          * here and let the timer_interrupt code sort out the actual time.
 613          */
 614         get_lppaca()->int_dword.fields.decr_int = 1;
 615         ppc64_runlatch_on();
 616         process_iSeries_events();
 617 }
 618
 619 static void iseries_shared_idle(void)
 620 {
 621         while (1) {
 622                 while (!need_resched() && !hvlpevent_is_pending()) {
 623                         local_irq_disable();
 624                         ppc64_runlatch_off();
 625
 626                         /* Recheck with irqs off */
 627                         if (!need_resched() && !hvlpevent_is_pending())
 628                                 yield_shared_processor();
 629
 630                         HMT_medium();
 631                         local_irq_enable();
 632                 }
 633
 634                 ppc64_runlatch_on();
 635
 636                 if (hvlpevent_is_pending())
 637                         process_iSeries_events();
 638
 639                 preempt_enable_no_resched();
 640                 schedule();
 641                 preempt_disable();
 642         }
 643 }
 644
 645 static void iseries_dedicated_idle(void)
 646 {
 647         set_thread_flag(TIF_POLLING_NRFLAG);
 648
 649         while (1) {
 650                 if (!need_resched()) {
 651                         while (!need_resched()) {
 652                                 ppc64_runlatch_off();
 653                                 HMT_low();
 654
 655                                 if (hvlpevent_is_pending()) {
 656                                         HMT_medium();
 657                                         ppc64_runlatch_on();
 658                                         process_iSeries_events();
 659                                 }
 660                         }
 661
 662                         HMT_medium();
 663                 }
 664
 665                 ppc64_runlatch_on();
 666                 preempt_enable_no_resched();
 667                 schedule();
 668                 preempt_disable();
 669         }
 670 }
 671
 672 #ifndef CONFIG_PCI
 673 void __init iSeries_init_IRQ(void) { }
 674 #endif
 675
 676 static int __init iseries_probe(void)
 677 {
 678         unsigned long root = of_get_flat_dt_root();
 679         if (!of_flat_dt_is_compatible(root, "IBM,iSeries"))
 680                 return 0;
 681
 682         powerpc_firmware_features |= FW_FEATURE_ISERIES;
 683         powerpc_firmware_features |= FW_FEATURE_LPAR;
 684
 685         /*
 686          * The Hypervisor only allows us up to 256 interrupt
 687          * sources (the irq number is passed in a u8).
 688          */
 689         virt_irq_max = 255;
 690
 691         return 1;
 692 }
 693
 694 define_machine(iseries) {
 695         .name           = "iSeries",
 696         .setup_arch     = iSeries_setup_arch,
 697         .show_cpuinfo   = iSeries_show_cpuinfo,
 698         .init_IRQ       = iSeries_init_IRQ,
 699         .get_irq        = iSeries_get_irq,
 700         .init_early     = iSeries_init_early,
 701         .pcibios_fixup  = iSeries_pci_final_fixup,
 702         .restart        = mf_reboot,
 703         .power_off      = mf_power_off,
 704         .halt           = mf_power_off,
 705         .get_boot_time  = iSeries_get_boot_time,
 706         .set_rtc_time   = iSeries_set_rtc_time,
 707         .get_rtc_time   = iSeries_get_rtc_time,
 708         .calibrate_decr = generic_calibrate_decr,
 709         .progress       = iSeries_progress,
 710         .probe          = iseries_probe,
 711         /* XXX Implement enable_pmcs for iSeries */
 712 };
 713
 714 struct blob {
 715         unsigned char data[PAGE_SIZE * 2];
 716         unsigned long next;
 717 };
 718
 719 struct iseries_flat_dt {
 720         struct boot_param_header header;
 721         u64 reserve_map[2];
 722         struct blob dt;
 723         struct blob strings;
 724 };
 725
 726 struct iseries_flat_dt iseries_dt;
 727
 728 void dt_init(struct iseries_flat_dt *dt)
 729 {
 730         dt->header.off_mem_rsvmap =
 731                 offsetof(struct iseries_flat_dt, reserve_map);
 732         dt->header.off_dt_struct = offsetof(struct iseries_flat_dt, dt);
 733         dt->header.off_dt_strings = offsetof(struct iseries_flat_dt, strings);
 734         dt->header.totalsize = sizeof(struct iseries_flat_dt);
 735         dt->header.dt_strings_size = sizeof(struct blob);
 736
 737         /* There is no notion of hardware cpu id on iSeries */
 738         dt->header.boot_cpuid_phys = smp_processor_id();
 739
 740         dt->dt.next = (unsigned long)&dt->dt.data;
 741         dt->strings.next = (unsigned long)&dt->strings.data;
 742
 743         dt->header.magic = OF_DT_HEADER;
 744         dt->header.version = 0x10;
 745         dt->header.last_comp_version = 0x10;
 746
 747         dt->reserve_map[0] = 0;
 748         dt->reserve_map[1] = 0;
 749 }
 750
 751 void dt_check_blob(struct blob *b)
 752 {
 753         if (b->next >= (unsigned long)&b->next) {
 754                 DBG("Ran out of space in flat device tree blob!\n");
 755                 BUG();
 756         }
 757 }
 758
 759 void dt_push_u32(struct iseries_flat_dt *dt, u32 value)
 760 {
 761         *((u32*)dt->dt.next) = value;
 762         dt->dt.next += sizeof(u32);
 763
 764         dt_check_blob(&dt->dt);
 765 }
 766
 767 void dt_push_u64(struct iseries_flat_dt *dt, u64 value)
 768 {
 769         *((u64*)dt->dt.next) = value;
 770         dt->dt.next += sizeof(u64);
 771
 772         dt_check_blob(&dt->dt);
 773 }
 774
 775 unsigned long dt_push_bytes(struct blob *blob, char *data, int len)
 776 {
 777         unsigned long start = blob->next - (unsigned long)blob->data;
 778
 779         memcpy((char *)blob->next, data, len);
 780         blob->next = _ALIGN(blob->next + len, 4);
 781
 782         dt_check_blob(blob);
 783
 784         return start;
 785 }
 786
 787 void dt_start_node(struct iseries_flat_dt *dt, char *name)
 788 {
 789         dt_push_u32(dt, OF_DT_BEGIN_NODE);
 790         dt_push_bytes(&dt->dt, name, strlen(name) + 1);
 791 }
 792
 793 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
 794
 795 void dt_prop(struct iseries_flat_dt *dt, char *name, char *data, int len)
 796 {
 797         unsigned long offset;
 798
 799         dt_push_u32(dt, OF_DT_PROP);
 800
 801         /* Length of the data */
 802         dt_push_u32(dt, len);
 803
 804         /* Put the property name in the string blob. */
 805         offset = dt_push_bytes(&dt->strings, name, strlen(name) + 1);
 806
 807         /* The offset of the properties name in the string blob. */
 808         dt_push_u32(dt, (u32)offset);
 809
 810         /* The actual data. */
 811         dt_push_bytes(&dt->dt, data, len);
 812 }
 813
 814 void dt_prop_str(struct iseries_flat_dt *dt, char *name, char *data)
 815 {
 816         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
 817 }
 818
 819 void dt_prop_u32(struct iseries_flat_dt *dt, char *name, u32 data)
 820 {
 821         dt_prop(dt, name, (char *)&data, sizeof(u32));
 822 }
 823
 824 void dt_prop_u64(struct iseries_flat_dt *dt, char *name, u64 data)
 825 {
 826         dt_prop(dt, name, (char *)&data, sizeof(u64));
 827 }
 828
 829 void dt_prop_u64_list(struct iseries_flat_dt *dt, char *name, u64 *data, int n)
 830 {
 831         dt_prop(dt, name, (char *)data, sizeof(u64) * n);
 832 }
 833
 834 void dt_prop_u32_list(struct iseries_flat_dt *dt, char *name, u32 *data, int n)
 835 {
 836         dt_prop(dt, name, (char *)data, sizeof(u32) * n);
 837 }
 838
 839 void dt_prop_empty(struct iseries_flat_dt *dt, char *name)
 840 {
 841         dt_prop(dt, name, NULL, 0);
 842 }
 843
 844 void dt_cpus(struct iseries_flat_dt *dt)
 845 {
 846         unsigned char buf[32];
 847         unsigned char *p;
 848         unsigned int i, index;
 849         struct IoHriProcessorVpd *d;
 850         u32 pft_size[2];
 851
 852         /* yuck */
 853         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
 854         p = strchr(buf, ' ');
 855         if (!p) p = buf + strlen(buf);
 856
 857         dt_start_node(dt, "cpus");
 858         dt_prop_u32(dt, "#address-cells", 1);
 859         dt_prop_u32(dt, "#size-cells", 0);
 860
 861         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
 862         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
 863
 864         for (i = 0; i < NR_CPUS; i++) {
 865                 if (lppaca[i].dyn_proc_status >= 2)
 866                         continue;
 867
 868                 snprintf(p, 32 - (p - buf), "@%d", i);
 869                 dt_start_node(dt, buf);
 870
 871                 dt_prop_str(dt, "device_type", "cpu");
 872
 873                 index = lppaca[i].dyn_hv_phys_proc_index;
 874                 d = &xIoHriProcessorVpd[index];
 875
 876                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
 877                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
 878
 879                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
 880                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
 881
 882                 /* magic conversions to Hz copied from old code */
 883                 dt_prop_u32(dt, "clock-frequency",
 884                         ((1UL << 34) * 1000000) / d->xProcFreq);
 885                 dt_prop_u32(dt, "timebase-frequency",
 886                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
 887
 888                 dt_prop_u32(dt, "reg", i);
 889
 890                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
 891
 892                 dt_end_node(dt);
 893         }
 894
 895         dt_end_node(dt);
 896 }
 897
 898 void dt_model(struct iseries_flat_dt *dt)
 899 {
 900         char buf[16] = "IBM,";
 901
 902         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
 903         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
 904         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
 905         buf[11] = '\0';
 906         dt_prop_str(dt, "system-id", buf);
 907
 908         /* "IBM," + machineType[0:4] */
 909         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
 910         buf[8] = '\0';
 911         dt_prop_str(dt, "model", buf);
 912
 913         dt_prop_str(dt, "compatible", "IBM,iSeries");
 914 }
 915
 916 void dt_vdevices(struct iseries_flat_dt *dt)
 917 {
 918         u32 reg = 0;
 919         HvLpIndexMap vlan_map;
 920         int i;
 921         char buf[32];
 922
 923         dt_start_node(dt, "vdevice");
 924         dt_prop_u32(dt, "#address-cells", 1);
 925         dt_prop_u32(dt, "#size-cells", 0);
 926
 927         snprintf(buf, sizeof(buf), "viocons@%08x", reg);
 928         dt_start_node(dt, buf);
 929         dt_prop_str(dt, "device_type", "serial");
 930         dt_prop_str(dt, "compatible", "");
 931         dt_prop_u32(dt, "reg", reg);
 932         dt_end_node(dt);
 933         reg++;
 934
 935         snprintf(buf, sizeof(buf), "v-scsi@%08x", reg);
 936         dt_start_node(dt, buf);
 937         dt_prop_str(dt, "device_type", "vscsi");
 938         dt_prop_str(dt, "compatible", "IBM,v-scsi");
 939         dt_prop_u32(dt, "reg", reg);
 940         dt_end_node(dt);
 941         reg++;
 942
 943         vlan_map = HvLpConfig_getVirtualLanIndexMap();
 944         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
 945                 unsigned char mac_addr[ETH_ALEN];
 946
 947                 if ((vlan_map & (0x8000 >> i)) == 0)
 948                         continue;
 949                 snprintf(buf, 32, "l-lan@%08x", reg + i);
 950                 dt_start_node(dt, buf);
 951                 dt_prop_str(dt, "device_type", "network");
 952                 dt_prop_str(dt, "compatible", "IBM,iSeries-l-lan");
 953                 dt_prop_u32(dt, "reg", reg + i);
 954                 dt_prop_u32(dt, "linux,unit_address", i);
 955
 956                 mac_addr[0] = 0x02;
 957                 mac_addr[1] = 0x01;
 958                 mac_addr[2] = 0xff;
 959                 mac_addr[3] = i;
 960                 mac_addr[4] = 0xff;
 961                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
 962                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
 963                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
 964                 dt_prop_u32(dt, "max-frame-size", 9000);
 965                 dt_prop_u32(dt, "address-bits", 48);
 966
 967                 dt_end_node(dt);
 968         }
 969         reg += HVMAXARCHITECTEDVIRTUALLANS;
 970
 971         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++) {
 972                 snprintf(buf, 32, "viodasd@%08x", reg + i);
 973                 dt_start_node(dt, buf);
 974                 dt_prop_str(dt, "device_type", "viodasd");
 975                 dt_prop_str(dt, "compatible", "");
 976                 dt_prop_u32(dt, "reg", reg + i);
 977                 dt_prop_u32(dt, "linux,unit_address", i);
 978                 dt_end_node(dt);
 979         }
 980         reg += HVMAXARCHITECTEDVIRTUALDISKS;
 981         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++) {
 982                 snprintf(buf, 32, "viocd@%08x", reg + i);
 983                 dt_start_node(dt, buf);
 984                 dt_prop_str(dt, "device_type", "viocd");
 985                 dt_prop_str(dt, "compatible", "");
 986                 dt_prop_u32(dt, "reg", reg + i);
 987                 dt_prop_u32(dt, "linux,unit_address", i);
 988                 dt_end_node(dt);
 989         }
 990         reg += HVMAXARCHITECTEDVIRTUALCDROMS;
 991         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++) {
 992                 snprintf(buf, 32, "viotape@%08x", reg + i);
 993                 dt_start_node(dt, buf);
 994                 dt_prop_str(dt, "device_type", "viotape");
 995                 dt_prop_str(dt, "compatible", "");
 996                 dt_prop_u32(dt, "reg", reg + i);
 997                 dt_prop_u32(dt, "linux,unit_address", i);
 998                 dt_end_node(dt);
 999         }
1000
1001         dt_end_node(dt);
1002 }
1003
1004 void build_flat_dt(struct iseries_flat_dt *dt, unsigned long phys_mem_size)
1005 {
1006         u64 tmp[2];
1007
1008         dt_init(dt);
1009
1010         dt_start_node(dt, "");
1011
1012         dt_prop_u32(dt, "#address-cells", 2);
1013         dt_prop_u32(dt, "#size-cells", 2);
1014         dt_model(dt);
1015
1016         /* /memory */
1017         dt_start_node(dt, "memory@0");
1018         dt_prop_str(dt, "name", "memory");
1019         dt_prop_str(dt, "device_type", "memory");
1020         tmp[0] = 0;
1021         tmp[1] = phys_mem_size;
1022         dt_prop_u64_list(dt, "reg", tmp, 2);
1023         dt_end_node(dt);
1024
1025         /* /chosen */
1026         dt_start_node(dt, "chosen");
1027         dt_prop_str(dt, "bootargs", cmd_line);
1028         if (cmd_mem_limit)
1029                 dt_prop_u64(dt, "linux,memory-limit", cmd_mem_limit);
1030         dt_end_node(dt);
1031
1032         dt_cpus(dt);
1033
1034         dt_vdevices(dt);
1035
1036         dt_end_node(dt);
1037
1038         dt_push_u32(dt, OF_DT_END);
1039 }
1040
1041 void * __init iSeries_early_setup(void)
1042 {
1043         unsigned long phys_mem_size;
1044
1045         iSeries_fixup_klimit();
1046
1047         /*
1048          * Initialize the table which translate Linux physical addresses to
1049          * AS/400 absolute addresses
1050          */
1051         phys_mem_size = build_iSeries_Memory_Map();
1052
1053         iSeries_get_cmdline();
1054
1055         /* Save unparsed command line copy for /proc/cmdline */
1056         strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
1057
1058         /* Parse early parameters, in particular mem=x */
1059         parse_early_param();
1060
1061         build_flat_dt(&iseries_dt, phys_mem_size);
1062
1063         return (void *) __pa(&iseries_dt);
1064 }
1065
1066 /*
1067  * On iSeries we just parse the mem=X option from the command line.
1068  * On pSeries it's a bit more complicated, see prom_init_mem()
1069  */
1070 static int __init early_parsemem(char *p)
1071 {
1072         if (p)
1073                 cmd_mem_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
1074         return 0;
1075 }
1076 early_param("mem", early_parsemem);
1077
1078 static void hvputc(char c)
1079 {
1080         if (c == '\n')
1081                 hvputc('\r');
1082
1083         HvCall_writeLogBuffer(&c, 1);
1084 }
1085
1086 void __init udbg_init_iseries(void)
1087 {
1088         udbg_putc = hvputc;
1089 }