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