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

   1 /*
   2  *    Copyright (C) 2005-2006 Michael Ellerman, IBM Corporation
   3  *    Copyright (C) 2000-2004, IBM Corporation
   4  *
   5  *    Description:
   6  *      This file contains all the routines to build a flattened device
   7  *      tree for a legacy iSeries machine.
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  */
  14
  15 #undef DEBUG
  16
  17 #include <linux/types.h>
  18 #include <linux/init.h>
  19 #include <linux/pci.h>
  20 #include <linux/pci_regs.h>
  21 #include <linux/pci_ids.h>
  22 #include <linux/threads.h>
  23 #include <linux/bitops.h>
  24 #include <linux/string.h>
  25 #include <linux/kernel.h>
  26 #include <linux/if_ether.h>     /* ETH_ALEN */
  27
  28 #include <asm/machdep.h>
  29 #include <asm/prom.h>
  30 #include <asm/lppaca.h>
  31 #include <asm/cputable.h>
  32 #include <asm/abs_addr.h>
  33 #include <asm/system.h>
  34 #include <asm/iseries/hv_types.h>
  35 #include <asm/iseries/hv_lp_config.h>
  36 #include <asm/iseries/hv_call_xm.h>
  37 #include <asm/udbg.h>
  38
  39 #include "processor_vpd.h"
  40 #include "call_hpt.h"
  41 #include "call_pci.h"
  42 #include "pci.h"
  43 #include "it_exp_vpd_panel.h"
  44 #include "naca.h"
  45
  46 #ifdef DEBUG
  47 #define DBG(fmt...) udbg_printf(fmt)
  48 #else
  49 #define DBG(fmt...)
  50 #endif
  51
  52 /*
  53  * These are created by the linker script at the start and end
  54  * of the section containing all the strings from this file.
  55  */
  56 extern char __dt_strings_start[];
  57 extern char __dt_strings_end[];
  58
  59 struct iseries_flat_dt {
  60         struct boot_param_header header;
  61         u64 reserve_map[2];
  62 };
  63
  64 static void * __initdata dt_data;
  65
  66 /*
  67  * Putting these strings here keeps them out of the section
  68  * that we rename to .dt_strings using objcopy and capture
  69  * for the strings blob of the flattened device tree.
  70  */
  71 static char __initdata device_type_cpu[] = "cpu";
  72 static char __initdata device_type_memory[] = "memory";
  73 static char __initdata device_type_serial[] = "serial";
  74 static char __initdata device_type_network[] = "network";
  75 static char __initdata device_type_pci[] = "pci";
  76 static char __initdata device_type_vdevice[] = "vdevice";
  77 static char __initdata device_type_vscsi[] = "vscsi";
  78
  79
  80 /* EBCDIC to ASCII conversion routines */
  81
  82 static unsigned char __init e2a(unsigned char x)
  83 {
  84         switch (x) {
  85         case 0x81 ... 0x89:
  86                 return x - 0x81 + 'a';
  87         case 0x91 ... 0x99:
  88                 return x - 0x91 + 'j';
  89         case 0xA2 ... 0xA9:
  90                 return x - 0xA2 + 's';
  91         case 0xC1 ... 0xC9:
  92                 return x - 0xC1 + 'A';
  93         case 0xD1 ... 0xD9:
  94                 return x - 0xD1 + 'J';
  95         case 0xE2 ... 0xE9:
  96                 return x - 0xE2 + 'S';
  97         case 0xF0 ... 0xF9:
  98                 return x - 0xF0 + '0';
  99         }
 100         return ' ';
 101 }
 102
 103 static unsigned char * __init strne2a(unsigned char *dest,
 104                 const unsigned char *src, size_t n)
 105 {
 106         int i;
 107
 108         n = strnlen(src, n);
 109
 110         for (i = 0; i < n; i++)
 111                 dest[i] = e2a(src[i]);
 112
 113         return dest;
 114 }
 115
 116 static struct iseries_flat_dt * __init dt_init(void)
 117 {
 118         struct iseries_flat_dt *dt;
 119         unsigned long str_len;
 120
 121         str_len = __dt_strings_end - __dt_strings_start;
 122         dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
 123         dt->header.off_mem_rsvmap =
 124                 offsetof(struct iseries_flat_dt, reserve_map);
 125         dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
 126         dt->header.off_dt_struct = dt->header.off_dt_strings
 127                 + ALIGN(str_len, 8);
 128         dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
 129         dt->header.dt_strings_size = str_len;
 130
 131         /* There is no notion of hardware cpu id on iSeries */
 132         dt->header.boot_cpuid_phys = smp_processor_id();
 133
 134         memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
 135                         str_len);
 136
 137         dt->header.magic = OF_DT_HEADER;
 138         dt->header.version = 0x10;
 139         dt->header.last_comp_version = 0x10;
 140
 141         dt->reserve_map[0] = 0;
 142         dt->reserve_map[1] = 0;
 143
 144         return dt;
 145 }
 146
 147 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
 148 {
 149         *((u32 *)dt_data) = value;
 150         dt_data += sizeof(u32);
 151 }
 152
 153 #ifdef notyet
 154 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
 155 {
 156         *((u64 *)dt_data) = value;
 157         dt_data += sizeof(u64);
 158 }
 159 #endif
 160
 161 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
 162                 int len)
 163 {
 164         memcpy(dt_data, data, len);
 165         dt_data += ALIGN(len, 4);
 166 }
 167
 168 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
 169 {
 170         dt_push_u32(dt, OF_DT_BEGIN_NODE);
 171         dt_push_bytes(dt, name, strlen(name) + 1);
 172 }
 173
 174 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
 175
 176 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
 177                 const void *data, int len)
 178 {
 179         unsigned long offset;
 180
 181         dt_push_u32(dt, OF_DT_PROP);
 182
 183         /* Length of the data */
 184         dt_push_u32(dt, len);
 185
 186         offset = name - __dt_strings_start;
 187
 188         /* The offset of the properties name in the string blob. */
 189         dt_push_u32(dt, (u32)offset);
 190
 191         /* The actual data. */
 192         dt_push_bytes(dt, data, len);
 193 }
 194
 195 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
 196                 const char *data)
 197 {
 198         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
 199 }
 200
 201 static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
 202                 u32 data)
 203 {
 204         dt_prop(dt, name, &data, sizeof(u32));
 205 }
 206
 207 static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
 208                 u64 data)
 209 {
 210         dt_prop(dt, name, &data, sizeof(u64));
 211 }
 212
 213 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
 214                 const char *name, u64 *data, int n)
 215 {
 216         dt_prop(dt, name, data, sizeof(u64) * n);
 217 }
 218
 219 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
 220                 const char *name, u32 *data, int n)
 221 {
 222         dt_prop(dt, name, data, sizeof(u32) * n);
 223 }
 224
 225 #ifdef notyet
 226 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
 227 {
 228         dt_prop(dt, name, NULL, 0);
 229 }
 230 #endif
 231
 232 static void __init dt_cpus(struct iseries_flat_dt *dt)
 233 {
 234         unsigned char buf[32];
 235         unsigned char *p;
 236         unsigned int i, index;
 237         struct IoHriProcessorVpd *d;
 238         u32 pft_size[2];
 239
 240         /* yuck */
 241         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
 242         p = strchr(buf, ' ');
 243         if (!p) p = buf + strlen(buf);
 244
 245         dt_start_node(dt, "cpus");
 246         dt_prop_u32(dt, "#address-cells", 1);
 247         dt_prop_u32(dt, "#size-cells", 0);
 248
 249         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
 250         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
 251
 252         for (i = 0; i < NR_CPUS; i++) {
 253                 if (lppaca[i].dyn_proc_status >= 2)
 254                         continue;
 255
 256                 snprintf(p, 32 - (p - buf), "@%d", i);
 257                 dt_start_node(dt, buf);
 258
 259                 dt_prop_str(dt, "device_type", device_type_cpu);
 260
 261                 index = lppaca[i].dyn_hv_phys_proc_index;
 262                 d = &xIoHriProcessorVpd[index];
 263
 264                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
 265                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
 266
 267                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
 268                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
 269
 270                 /* magic conversions to Hz copied from old code */
 271                 dt_prop_u32(dt, "clock-frequency",
 272                         ((1UL << 34) * 1000000) / d->xProcFreq);
 273                 dt_prop_u32(dt, "timebase-frequency",
 274                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
 275
 276                 dt_prop_u32(dt, "reg", i);
 277
 278                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
 279
 280                 dt_end_node(dt);
 281         }
 282
 283         dt_end_node(dt);
 284 }
 285
 286 static void __init dt_model(struct iseries_flat_dt *dt)
 287 {
 288         char buf[16] = "IBM,";
 289
 290         /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
 291         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
 292         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
 293         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
 294         buf[11] = '\0';
 295         dt_prop_str(dt, "system-id", buf);
 296
 297         /* "IBM," + machineType[0:4] */
 298         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
 299         buf[8] = '\0';
 300         dt_prop_str(dt, "model", buf);
 301
 302         dt_prop_str(dt, "compatible", "IBM,iSeries");
 303         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
 304 }
 305
 306 static void __init dt_initrd(struct iseries_flat_dt *dt)
 307 {
 308 #ifdef CONFIG_BLK_DEV_INITRD
 309         if (naca.xRamDisk) {
 310                 dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
 311                 dt_prop_u64(dt, "linux,initrd-end",
 312                         (u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
 313         }
 314 #endif
 315 }
 316
 317 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
 318                 const char *name, u32 reg, int unit,
 319                 const char *type, const char *compat, int end)
 320 {
 321         char buf[32];
 322
 323         snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
 324         dt_start_node(dt, buf);
 325         dt_prop_str(dt, "device_type", type);
 326         if (compat)
 327                 dt_prop_str(dt, "compatible", compat);
 328         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
 329         if (unit >= 0)
 330                 dt_prop_u32(dt, "linux,unit_address", unit);
 331         if (end)
 332                 dt_end_node(dt);
 333 }
 334
 335 static void __init dt_vdevices(struct iseries_flat_dt *dt)
 336 {
 337         u32 reg = 0;
 338         HvLpIndexMap vlan_map;
 339         int i;
 340
 341         dt_start_node(dt, "vdevice");
 342         dt_prop_str(dt, "device_type", device_type_vdevice);
 343         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
 344         dt_prop_u32(dt, "#address-cells", 1);
 345         dt_prop_u32(dt, "#size-cells", 0);
 346
 347         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
 348                         "IBM,iSeries-vty", 1);
 349         reg++;
 350
 351         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
 352                         "IBM,v-scsi", 1);
 353         reg++;
 354
 355         vlan_map = HvLpConfig_getVirtualLanIndexMap();
 356         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
 357                 unsigned char mac_addr[ETH_ALEN];
 358
 359                 if ((vlan_map & (0x8000 >> i)) == 0)
 360                         continue;
 361                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
 362                                 "IBM,iSeries-l-lan", 0);
 363                 mac_addr[0] = 0x02;
 364                 mac_addr[1] = 0x01;
 365                 mac_addr[2] = 0xff;
 366                 mac_addr[3] = i;
 367                 mac_addr[4] = 0xff;
 368                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
 369                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
 370                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
 371                 dt_prop_u32(dt, "max-frame-size", 9000);
 372                 dt_prop_u32(dt, "address-bits", 48);
 373
 374                 dt_end_node(dt);
 375         }
 376
 377         dt_end_node(dt);
 378 }
 379
 380 struct pci_class_name {
 381         u16 code;
 382         const char *name;
 383         const char *type;
 384 };
 385
 386 static struct pci_class_name __initdata pci_class_name[] = {
 387         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
 388 };
 389
 390 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
 391 {
 392         struct pci_class_name *cp;
 393
 394         for (cp = pci_class_name;
 395                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
 396                 if (cp->code == class_code)
 397                         return cp;
 398         return NULL;
 399 }
 400
 401 /*
 402  * This assumes that the node slot is always on the primary bus!
 403  */
 404 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
 405                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
 406 {
 407         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
 408         u16 vendor_id;
 409         u16 device_id;
 410         u32 class_id;
 411         int err;
 412         char buf[32];
 413         u32 reg[5];
 414         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
 415         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
 416         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
 417         u8 devfn;
 418         struct pci_class_name *cp;
 419
 420         /*
 421          * Connect all functions of any device found.
 422          */
 423         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
 424                 for (function = 0; function < 8; function++) {
 425                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
 426                                         function);
 427                         err = HvCallXm_connectBusUnit(bus, sub_bus,
 428                                         agent_id, 0);
 429                         if (err) {
 430                                 if (err != 0x302)
 431                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
 432                                                 bus, sub_bus, agent_id, err);
 433                                 continue;
 434                         }
 435
 436                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 437                                         PCI_VENDOR_ID, &vendor_id);
 438                         if (err) {
 439                                 DBG("ReadVendor(%x, %x, %x) %x\n",
 440                                         bus, sub_bus, agent_id, err);
 441                                 continue;
 442                         }
 443                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 444                                         PCI_DEVICE_ID, &device_id);
 445                         if (err) {
 446                                 DBG("ReadDevice(%x, %x, %x) %x\n",
 447                                         bus, sub_bus, agent_id, err);
 448                                 continue;
 449                         }
 450                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
 451                                         PCI_CLASS_REVISION , &class_id);
 452                         if (err) {
 453                                 DBG("ReadClass(%x, %x, %x) %x\n",
 454                                         bus, sub_bus, agent_id, err);
 455                                 continue;
 456                         }
 457
 458                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
 459                                         function);
 460                         cp = dt_find_pci_class_name(class_id >> 16);
 461                         if (cp && cp->name)
 462                                 strncpy(buf, cp->name, sizeof(buf) - 1);
 463                         else
 464                                 snprintf(buf, sizeof(buf), "pci%x,%x",
 465                                                 vendor_id, device_id);
 466                         buf[sizeof(buf) - 1] = '\0';
 467                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 468                                         "@%x", PCI_SLOT(devfn));
 469                         buf[sizeof(buf) - 1] = '\0';
 470                         if (function != 0)
 471                                 snprintf(buf + strlen(buf),
 472                                         sizeof(buf) - strlen(buf),
 473                                         ",%x", function);
 474                         dt_start_node(dt, buf);
 475                         reg[0] = (bus << 16) | (devfn << 8);
 476                         reg[1] = 0;
 477                         reg[2] = 0;
 478                         reg[3] = 0;
 479                         reg[4] = 0;
 480                         dt_prop_u32_list(dt, "reg", reg, 5);
 481                         if (cp && (cp->type || cp->name))
 482                                 dt_prop_str(dt, "device_type",
 483                                         cp->type ? cp->type : cp->name);
 484                         dt_prop_u32(dt, "vendor-id", vendor_id);
 485                         dt_prop_u32(dt, "device-id", device_id);
 486                         dt_prop_u32(dt, "class-code", class_id >> 8);
 487                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
 488                         dt_prop_u32(dt, "linux,subbus", sub_bus);
 489                         dt_prop_u32(dt, "linux,agent-id", agent_id);
 490                         dt_prop_u32(dt, "linux,logical-slot-number",
 491                                         bridge_info->logicalSlotNumber);
 492                         dt_end_node(dt);
 493
 494                 }
 495         }
 496 }
 497
 498 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
 499                 HvSubBusNumber sub_bus, int id_sel)
 500 {
 501         struct HvCallPci_BridgeInfo bridge_info;
 502         HvAgentId agent_id;
 503         int function;
 504         int ret;
 505
 506         /* Note: hvSubBus and irq is always be 0 at this level! */
 507         for (function = 0; function < 8; ++function) {
 508                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
 509                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
 510                 if (ret != 0) {
 511                         if (ret != 0xb)
 512                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
 513                                                 bus, sub_bus, agent_id, ret);
 514                         continue;
 515                 }
 516                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
 517                                 bus, id_sel, function, agent_id);
 518                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
 519                                 iseries_hv_addr(&bridge_info),
 520                                 sizeof(struct HvCallPci_BridgeInfo));
 521                 if (ret != 0)
 522                         continue;
 523                 DBG("bridge info: type %x subbus %x "
 524                         "maxAgents %x maxsubbus %x logslot %x\n",
 525                         bridge_info.busUnitInfo.deviceType,
 526                         bridge_info.subBusNumber,
 527                         bridge_info.maxAgents,
 528                         bridge_info.maxSubBusNumber,
 529                         bridge_info.logicalSlotNumber);
 530                 if (bridge_info.busUnitInfo.deviceType ==
 531                                 HvCallPci_BridgeDevice)
 532                         scan_bridge_slot(dt, bus, &bridge_info);
 533                 else
 534                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
 535                                 bridge_info.busUnitInfo.deviceType);
 536         }
 537 }
 538
 539 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
 540 {
 541         struct HvCallPci_DeviceInfo dev_info;
 542         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
 543         int err;
 544         int id_sel;
 545         const int max_agents = 8;
 546
 547         /*
 548          * Probe for EADs Bridges
 549          */
 550         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
 551                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
 552                                 iseries_hv_addr(&dev_info),
 553                                 sizeof(struct HvCallPci_DeviceInfo));
 554                 if (err) {
 555                         if (err != 0x302)
 556                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
 557                                                 bus, sub_bus, id_sel, err);
 558                         continue;
 559                 }
 560                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
 561                         DBG("PCI: Invalid System Configuration"
 562                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
 563                                         dev_info.deviceType, bus, id_sel);
 564                         continue;
 565                 }
 566                 scan_bridge(dt, bus, sub_bus, id_sel);
 567         }
 568 }
 569
 570 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
 571 {
 572         HvBusNumber bus;
 573         char buf[32];
 574         u32 buses[2];
 575         int phb_num = 0;
 576
 577         /* Check all possible buses. */
 578         for (bus = 0; bus < 256; bus++) {
 579                 int err = HvCallXm_testBus(bus);
 580
 581                 if (err) {
 582                         /*
 583                          * Check for Unexpected Return code, a clue that
 584                          * something has gone wrong.
 585                          */
 586                         if (err != 0x0301)
 587                                 DBG("Unexpected Return on Probe(0x%02X) "
 588                                                 "0x%04X\n", bus, err);
 589                         continue;
 590                 }
 591                 DBG("bus %d appears to exist\n", bus);
 592                 snprintf(buf, 32, "pci@%d", phb_num);
 593                 dt_start_node(dt, buf);
 594                 dt_prop_str(dt, "device_type", device_type_pci);
 595                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
 596                 dt_prop_u32(dt, "#address-cells", 3);
 597                 dt_prop_u32(dt, "#size-cells", 2);
 598                 buses[0] = buses[1] = bus;
 599                 dt_prop_u32_list(dt, "bus-range", buses, 2);
 600                 scan_phb(dt, bus);
 601                 dt_end_node(dt);
 602                 phb_num++;
 603         }
 604 }
 605
 606 static void dt_finish(struct iseries_flat_dt *dt)
 607 {
 608         dt_push_u32(dt, OF_DT_END);
 609         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
 610         klimit = ALIGN((unsigned long)dt_data, 8);
 611 }
 612
 613 void * __init build_flat_dt(unsigned long phys_mem_size)
 614 {
 615         struct iseries_flat_dt *iseries_dt;
 616         u64 tmp[2];
 617
 618         iseries_dt = dt_init();
 619
 620         dt_start_node(iseries_dt, "");
 621
 622         dt_prop_u32(iseries_dt, "#address-cells", 2);
 623         dt_prop_u32(iseries_dt, "#size-cells", 2);
 624         dt_model(iseries_dt);
 625
 626         /* /memory */
 627         dt_start_node(iseries_dt, "memory@0");
 628         dt_prop_str(iseries_dt, "device_type", device_type_memory);
 629         tmp[0] = 0;
 630         tmp[1] = phys_mem_size;
 631         dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
 632         dt_end_node(iseries_dt);
 633
 634         /* /chosen */
 635         dt_start_node(iseries_dt, "chosen");
 636         dt_prop_str(iseries_dt, "bootargs", cmd_line);
 637         dt_initrd(iseries_dt);
 638         dt_end_node(iseries_dt);
 639
 640         dt_cpus(iseries_dt);
 641
 642         dt_vdevices(iseries_dt);
 643         dt_pci_devices(iseries_dt);
 644
 645         dt_end_node(iseries_dt);
 646
 647         dt_finish(iseries_dt);
 648
 649         return iseries_dt;
 650 }