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 marked with the DS macro.
  55  */
  56 extern char __dt_strings_start[];
  57 extern char __dt_strings_end[];
  58
  59 #define DS(s)   ({      \
  60         static const char __s[] __attribute__((section(".dt_strings"))) = s; \
  61         __s;            \
  62 })
  63
  64 struct iseries_flat_dt {
  65         struct boot_param_header header;
  66         u64 reserve_map[2];
  67 };
  68
  69 static void * __initdata dt_data;
  70
  71 /*
  72  * Putting these strings here keeps them out of the .dt_strings section
  73  * that we capture for the strings blob of the flattened device tree.
  74  */
  75 static char __initdata device_type_cpu[] = "cpu";
  76 static char __initdata device_type_memory[] = "memory";
  77 static char __initdata device_type_serial[] = "serial";
  78 static char __initdata device_type_network[] = "network";
  79 static char __initdata device_type_pci[] = "pci";
  80 static char __initdata device_type_vdevice[] = "vdevice";
  81 static char __initdata device_type_vscsi[] = "vscsi";
  82
  83
  84 /* EBCDIC to ASCII conversion routines */
  85
  86 static unsigned char __init e2a(unsigned char x)
  87 {
  88         switch (x) {
  89         case 0x81 ... 0x89:
  90                 return x - 0x81 + 'a';
  91         case 0x91 ... 0x99:
  92                 return x - 0x91 + 'j';
  93         case 0xA2 ... 0xA9:
  94                 return x - 0xA2 + 's';
  95         case 0xC1 ... 0xC9:
  96                 return x - 0xC1 + 'A';
  97         case 0xD1 ... 0xD9:
  98                 return x - 0xD1 + 'J';
  99         case 0xE2 ... 0xE9:
 100                 return x - 0xE2 + 'S';
 101         case 0xF0 ... 0xF9:
 102                 return x - 0xF0 + '0';
 103         }
 104         return ' ';
 105 }
 106
 107 static unsigned char * __init strne2a(unsigned char *dest,
 108                 const unsigned char *src, size_t n)
 109 {
 110         int i;
 111
 112         n = strnlen(src, n);
 113
 114         for (i = 0; i < n; i++)
 115                 dest[i] = e2a(src[i]);
 116
 117         return dest;
 118 }
 119
 120 static struct iseries_flat_dt * __init dt_init(void)
 121 {
 122         struct iseries_flat_dt *dt;
 123         unsigned long str_len;
 124
 125         str_len = __dt_strings_end - __dt_strings_start;
 126         dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
 127         dt->header.off_mem_rsvmap =
 128                 offsetof(struct iseries_flat_dt, reserve_map);
 129         dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
 130         dt->header.off_dt_struct = dt->header.off_dt_strings
 131                 + ALIGN(str_len, 8);
 132         dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
 133         dt->header.dt_strings_size = str_len;
 134
 135         /* There is no notion of hardware cpu id on iSeries */
 136         dt->header.boot_cpuid_phys = smp_processor_id();
 137
 138         memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
 139                         str_len);
 140
 141         dt->header.magic = OF_DT_HEADER;
 142         dt->header.version = 0x10;
 143         dt->header.last_comp_version = 0x10;
 144
 145         dt->reserve_map[0] = 0;
 146         dt->reserve_map[1] = 0;
 147
 148         return dt;
 149 }
 150
 151 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
 152 {
 153         *((u32 *)dt_data) = value;
 154         dt_data += sizeof(u32);
 155 }
 156
 157 #ifdef notyet
 158 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
 159 {
 160         *((u64 *)dt_data) = value;
 161         dt_data += sizeof(u64);
 162 }
 163 #endif
 164
 165 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
 166                 int len)
 167 {
 168         memcpy(dt_data, data, len);
 169         dt_data += ALIGN(len, 4);
 170 }
 171
 172 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
 173 {
 174         dt_push_u32(dt, OF_DT_BEGIN_NODE);
 175         dt_push_bytes(dt, name, strlen(name) + 1);
 176 }
 177
 178 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
 179
 180 static void __init __dt_prop(struct iseries_flat_dt *dt, const char *name,
 181                 const void *data, int len)
 182 {
 183         unsigned long offset;
 184
 185         dt_push_u32(dt, OF_DT_PROP);
 186
 187         /* Length of the data */
 188         dt_push_u32(dt, len);
 189
 190         offset = name - __dt_strings_start;
 191
 192         /* The offset of the properties name in the string blob. */
 193         dt_push_u32(dt, (u32)offset);
 194
 195         /* The actual data. */
 196         dt_push_bytes(dt, data, len);
 197 }
 198 #define dt_prop(dt, name, data, len)    __dt_prop((dt), DS(name), (data), (len))
 199
 200 #define dt_prop_str(dt, name, data)     \
 201         dt_prop((dt), name, (data), strlen((data)) + 1); /* + 1 for NULL */
 202
 203 static void __init __dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
 204                 u32 data)
 205 {
 206         __dt_prop(dt, name, &data, sizeof(u32));
 207 }
 208 #define dt_prop_u32(dt, name, data)     __dt_prop_u32((dt), DS(name), (data))
 209
 210 static void __init __maybe_unused __dt_prop_u64(struct iseries_flat_dt *dt,
 211                 const char *name, u64 data)
 212 {
 213         __dt_prop(dt, name, &data, sizeof(u64));
 214 }
 215 #define dt_prop_u64(dt, name, data)     __dt_prop_u64((dt), DS(name), (data))
 216
 217 #define dt_prop_u64_list(dt, name, data, n)     \
 218         dt_prop((dt), name, (data), sizeof(u64) * (n))
 219
 220 #define dt_prop_u32_list(dt, name, data, n)     \
 221         dt_prop((dt), name, (data), sizeof(u32) * (n))
 222
 223 #define dt_prop_empty(dt, name)         dt_prop((dt), name, NULL, 0)
 224
 225 static void __init dt_cpus(struct iseries_flat_dt *dt)
 226 {
 227         unsigned char buf[32];
 228         unsigned char *p;
 229         unsigned int i, index;
 230         struct IoHriProcessorVpd *d;
 231         u32 pft_size[2];
 232
 233         /* yuck */
 234         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
 235         p = strchr(buf, ' ');
 236         if (!p) p = buf + strlen(buf);
 237
 238         dt_start_node(dt, "cpus");
 239         dt_prop_u32(dt, "#address-cells", 1);
 240         dt_prop_u32(dt, "#size-cells", 0);
 241
 242         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
 243         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
 244
 245         for (i = 0; i < NR_CPUS; i++) {
 246                 if (lppaca_of(i).dyn_proc_status >= 2)
 247                         continue;
 248
 249                 snprintf(p, 32 - (p - buf), "@%d", i);
 250                 dt_start_node(dt, buf);
 251
 252                 dt_prop_str(dt, "device_type", device_type_cpu);
 253
 254                 index = lppaca_of(i).dyn_hv_phys_proc_index;
 255                 d = &xIoHriProcessorVpd[index];
 256
 257                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
 258                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
 259
 260                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
 261                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
 262
 263                 /* magic conversions to Hz copied from old code */
 264                 dt_prop_u32(dt, "clock-frequency",
 265                         ((1UL << 34) * 1000000) / d->xProcFreq);
 266                 dt_prop_u32(dt, "timebase-frequency",
 267                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
 268
 269                 dt_prop_u32(dt, "reg", i);
 270
 271                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
 272
 273                 dt_end_node(dt);
 274         }
 275
 276         dt_end_node(dt);
 277 }
 278
 279 static void __init dt_model(struct iseries_flat_dt *dt)
 280 {
 281         char buf[16] = "IBM,";
 282
 283         /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
 284         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
 285         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
 286         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
 287         buf[11] = '\0';
 288         dt_prop_str(dt, "system-id", buf);
 289
 290         /* "IBM," + machineType[0:4] */
 291         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
 292         buf[8] = '\0';
 293         dt_prop_str(dt, "model", buf);
 294
 295         dt_prop_str(dt, "compatible", "IBM,iSeries");
 296         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
 297 }
 298
 299 static void __init dt_initrd(struct iseries_flat_dt *dt)
 300 {
 301 #ifdef CONFIG_BLK_DEV_INITRD
 302         if (naca.xRamDisk) {
 303                 dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
 304                 dt_prop_u64(dt, "linux,initrd-end",
 305                         (u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
 306         }
 307 #endif
 308 }
 309
 310 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
 311                 const char *name, u32 reg, int unit,
 312                 const char *type, const char *compat, int end)
 313 {
 314         char buf[32];
 315
 316         snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
 317         dt_start_node(dt, buf);
 318         dt_prop_str(dt, "device_type", type);
 319         if (compat)
 320                 dt_prop_str(dt, "compatible", compat);
 321         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
 322         if (unit >= 0)
 323                 dt_prop_u32(dt, "linux,unit_address", unit);
 324         if (end)
 325                 dt_end_node(dt);
 326 }
 327
 328 static void __init dt_vdevices(struct iseries_flat_dt *dt)
 329 {
 330         u32 reg = 0;
 331         HvLpIndexMap vlan_map;
 332         int i;
 333
 334         dt_start_node(dt, "vdevice");
 335         dt_prop_str(dt, "device_type", device_type_vdevice);
 336         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
 337         dt_prop_u32(dt, "#address-cells", 1);
 338         dt_prop_u32(dt, "#size-cells", 0);
 339
 340         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
 341                         "IBM,iSeries-vty", 1);
 342         reg++;
 343
 344         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
 345                         "IBM,v-scsi", 1);
 346         reg++;
 347
 348         vlan_map = HvLpConfig_getVirtualLanIndexMap();
 349         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
 350                 unsigned char mac_addr[ETH_ALEN];
 351
 352                 if ((vlan_map & (0x8000 >> i)) == 0)
 353                         continue;
 354                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
 355                                 "IBM,iSeries-l-lan", 0);
 356                 mac_addr[0] = 0x02;
 357                 mac_addr[1] = 0x01;
 358                 mac_addr[2] = 0xff;
 359                 mac_addr[3] = i;
 360                 mac_addr[4] = 0xff;
 361                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
 362                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
 363                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
 364                 dt_prop_u32(dt, "max-frame-size", 9000);
 365                 dt_prop_u32(dt, "address-bits", 48);
 366
 367                 dt_end_node(dt);
 368         }
 369
 370         dt_end_node(dt);
 371 }
 372
 373 struct pci_class_name {
 374         u16 code;
 375         const char *name;
 376         const char *type;
 377 };
 378
 379 static struct pci_class_name __initdata pci_class_name[] = {
 380         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
 381 };
 382
 383 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
 384 {
 385         struct pci_class_name *cp;
 386
 387         for (cp = pci_class_name;
 388                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
 389                 if (cp->code == class_code)
 390                         return cp;
 391         return NULL;
 392 }
 393
 394 /*
 395  * This assumes that the node slot is always on the primary bus!
 396  */
 397 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
 398                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
 399 {
 400         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
 401         u16 vendor_id;
 402         u16 device_id;
 403         u32 class_id;
 404         int err;
 405         char buf[32];
 406         u32 reg[5];
 407         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
 408         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
 409         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
 410         u8 devfn;
 411         struct pci_class_name *cp;
 412
 413         /*
 414          * Connect all functions of any device found.
 415          */
 416         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
 417                 for (function = 0; function < 8; function++) {
 418                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
 419                                         function);
 420                         err = HvCallXm_connectBusUnit(bus, sub_bus,
 421                                         agent_id, 0);
 422                         if (err) {
 423                                 if (err != 0x302)
 424                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
 425                                                 bus, sub_bus, agent_id, err);
 426                                 continue;
 427                         }
 428
 429                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 430                                         PCI_VENDOR_ID, &vendor_id);
 431                         if (err) {
 432                                 DBG("ReadVendor(%x, %x, %x) %x\n",
 433                                         bus, sub_bus, agent_id, err);
 434                                 continue;
 435                         }
 436                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 437                                         PCI_DEVICE_ID, &device_id);
 438                         if (err) {
 439                                 DBG("ReadDevice(%x, %x, %x) %x\n",
 440                                         bus, sub_bus, agent_id, err);
 441                                 continue;
 442                         }
 443                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
 444                                         PCI_CLASS_REVISION , &class_id);
 445                         if (err) {
 446                                 DBG("ReadClass(%x, %x, %x) %x\n",
 447                                         bus, sub_bus, agent_id, err);
 448                                 continue;
 449                         }
 450
 451                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
 452                                         function);
 453                         cp = dt_find_pci_class_name(class_id >> 16);
 454                         if (cp && cp->name)
 455                                 strncpy(buf, cp->name, sizeof(buf) - 1);
 456                         else
 457                                 snprintf(buf, sizeof(buf), "pci%x,%x",
 458                                                 vendor_id, device_id);
 459                         buf[sizeof(buf) - 1] = '\0';
 460                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 461                                         "@%x", PCI_SLOT(devfn));
 462                         buf[sizeof(buf) - 1] = '\0';
 463                         if (function != 0)
 464                                 snprintf(buf + strlen(buf),
 465                                         sizeof(buf) - strlen(buf),
 466                                         ",%x", function);
 467                         dt_start_node(dt, buf);
 468                         reg[0] = (bus << 16) | (devfn << 8);
 469                         reg[1] = 0;
 470                         reg[2] = 0;
 471                         reg[3] = 0;
 472                         reg[4] = 0;
 473                         dt_prop_u32_list(dt, "reg", reg, 5);
 474                         if (cp && (cp->type || cp->name))
 475                                 dt_prop_str(dt, "device_type",
 476                                         cp->type ? cp->type : cp->name);
 477                         dt_prop_u32(dt, "vendor-id", vendor_id);
 478                         dt_prop_u32(dt, "device-id", device_id);
 479                         dt_prop_u32(dt, "class-code", class_id >> 8);
 480                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
 481                         dt_prop_u32(dt, "linux,subbus", sub_bus);
 482                         dt_prop_u32(dt, "linux,agent-id", agent_id);
 483                         dt_prop_u32(dt, "linux,logical-slot-number",
 484                                         bridge_info->logicalSlotNumber);
 485                         dt_end_node(dt);
 486
 487                 }
 488         }
 489 }
 490
 491 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
 492                 HvSubBusNumber sub_bus, int id_sel)
 493 {
 494         struct HvCallPci_BridgeInfo bridge_info;
 495         HvAgentId agent_id;
 496         int function;
 497         int ret;
 498
 499         /* Note: hvSubBus and irq is always be 0 at this level! */
 500         for (function = 0; function < 8; ++function) {
 501                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
 502                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
 503                 if (ret != 0) {
 504                         if (ret != 0xb)
 505                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
 506                                                 bus, sub_bus, agent_id, ret);
 507                         continue;
 508                 }
 509                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
 510                                 bus, id_sel, function, agent_id);
 511                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
 512                                 iseries_hv_addr(&bridge_info),
 513                                 sizeof(struct HvCallPci_BridgeInfo));
 514                 if (ret != 0)
 515                         continue;
 516                 DBG("bridge info: type %x subbus %x "
 517                         "maxAgents %x maxsubbus %x logslot %x\n",
 518                         bridge_info.busUnitInfo.deviceType,
 519                         bridge_info.subBusNumber,
 520                         bridge_info.maxAgents,
 521                         bridge_info.maxSubBusNumber,
 522                         bridge_info.logicalSlotNumber);
 523                 if (bridge_info.busUnitInfo.deviceType ==
 524                                 HvCallPci_BridgeDevice)
 525                         scan_bridge_slot(dt, bus, &bridge_info);
 526                 else
 527                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
 528                                 bridge_info.busUnitInfo.deviceType);
 529         }
 530 }
 531
 532 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
 533 {
 534         struct HvCallPci_DeviceInfo dev_info;
 535         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
 536         int err;
 537         int id_sel;
 538         const int max_agents = 8;
 539
 540         /*
 541          * Probe for EADs Bridges
 542          */
 543         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
 544                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
 545                                 iseries_hv_addr(&dev_info),
 546                                 sizeof(struct HvCallPci_DeviceInfo));
 547                 if (err) {
 548                         if (err != 0x302)
 549                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
 550                                                 bus, sub_bus, id_sel, err);
 551                         continue;
 552                 }
 553                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
 554                         DBG("PCI: Invalid System Configuration"
 555                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
 556                                         dev_info.deviceType, bus, id_sel);
 557                         continue;
 558                 }
 559                 scan_bridge(dt, bus, sub_bus, id_sel);
 560         }
 561 }
 562
 563 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
 564 {
 565         HvBusNumber bus;
 566         char buf[32];
 567         u32 buses[2];
 568         int phb_num = 0;
 569
 570         /* Check all possible buses. */
 571         for (bus = 0; bus < 256; bus++) {
 572                 int err = HvCallXm_testBus(bus);
 573
 574                 if (err) {
 575                         /*
 576                          * Check for Unexpected Return code, a clue that
 577                          * something has gone wrong.
 578                          */
 579                         if (err != 0x0301)
 580                                 DBG("Unexpected Return on Probe(0x%02X) "
 581                                                 "0x%04X\n", bus, err);
 582                         continue;
 583                 }
 584                 DBG("bus %d appears to exist\n", bus);
 585                 snprintf(buf, 32, "pci@%d", phb_num);
 586                 dt_start_node(dt, buf);
 587                 dt_prop_str(dt, "device_type", device_type_pci);
 588                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
 589                 dt_prop_u32(dt, "#address-cells", 3);
 590                 dt_prop_u32(dt, "#size-cells", 2);
 591                 buses[0] = buses[1] = bus;
 592                 dt_prop_u32_list(dt, "bus-range", buses, 2);
 593                 scan_phb(dt, bus);
 594                 dt_end_node(dt);
 595                 phb_num++;
 596         }
 597 }
 598
 599 static void dt_finish(struct iseries_flat_dt *dt)
 600 {
 601         dt_push_u32(dt, OF_DT_END);
 602         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
 603         klimit = ALIGN((unsigned long)dt_data, 8);
 604 }
 605
 606 void * __init build_flat_dt(unsigned long phys_mem_size)
 607 {
 608         struct iseries_flat_dt *iseries_dt;
 609         u64 tmp[2];
 610
 611         iseries_dt = dt_init();
 612
 613         dt_start_node(iseries_dt, "");
 614
 615         dt_prop_u32(iseries_dt, "#address-cells", 2);
 616         dt_prop_u32(iseries_dt, "#size-cells", 2);
 617         dt_model(iseries_dt);
 618
 619         /* /memory */
 620         dt_start_node(iseries_dt, "memory@0");
 621         dt_prop_str(iseries_dt, "device_type", device_type_memory);
 622         tmp[0] = 0;
 623         tmp[1] = phys_mem_size;
 624         dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
 625         dt_end_node(iseries_dt);
 626
 627         /* /chosen */
 628         dt_start_node(iseries_dt, "chosen");
 629         dt_prop_str(iseries_dt, "bootargs", cmd_line);
 630         dt_initrd(iseries_dt);
 631         dt_end_node(iseries_dt);
 632
 633         dt_cpus(iseries_dt);
 634
 635         dt_vdevices(iseries_dt);
 636         dt_pci_devices(iseries_dt);
 637
 638         dt_end_node(iseries_dt);
 639
 640         dt_finish(iseries_dt);
 641
 642         return iseries_dt;
 643 }