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/page.h>
  31 #include <asm/cputable.h>
  32 #include <asm/abs_addr.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 struct blob {
  51         unsigned char data[PAGE_SIZE * 2];
  52         unsigned long next;
  53 };
  54
  55 struct iseries_flat_dt {
  56         struct boot_param_header header;
  57         u64 reserve_map[2];
  58         struct blob dt;
  59         struct blob strings;
  60 };
  61
  62 static struct iseries_flat_dt iseries_dt;
  63
  64 static void __init dt_init(struct iseries_flat_dt *dt)
  65 {
  66         dt->header.off_mem_rsvmap =
  67                 offsetof(struct iseries_flat_dt, reserve_map);
  68         dt->header.off_dt_struct = offsetof(struct iseries_flat_dt, dt);
  69         dt->header.off_dt_strings = offsetof(struct iseries_flat_dt, strings);
  70         dt->header.totalsize = sizeof(struct iseries_flat_dt);
  71         dt->header.dt_strings_size = sizeof(struct blob);
  72
  73         /* There is no notion of hardware cpu id on iSeries */
  74         dt->header.boot_cpuid_phys = smp_processor_id();
  75
  76         dt->dt.next = (unsigned long)&dt->dt.data;
  77         dt->strings.next = (unsigned long)&dt->strings.data;
  78
  79         dt->header.magic = OF_DT_HEADER;
  80         dt->header.version = 0x10;
  81         dt->header.last_comp_version = 0x10;
  82
  83         dt->reserve_map[0] = 0;
  84         dt->reserve_map[1] = 0;
  85 }
  86
  87 static void __init dt_check_blob(struct blob *b)
  88 {
  89         if (b->next >= (unsigned long)&b->next) {
  90                 DBG("Ran out of space in flat device tree blob!\n");
  91                 BUG();
  92         }
  93 }
  94
  95 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
  96 {
  97         *((u32*)dt->dt.next) = value;
  98         dt->dt.next += sizeof(u32);
  99
 100         dt_check_blob(&dt->dt);
 101 }
 102
 103 #ifdef notyet
 104 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
 105 {
 106         *((u64*)dt->dt.next) = value;
 107         dt->dt.next += sizeof(u64);
 108
 109         dt_check_blob(&dt->dt);
 110 }
 111 #endif
 112
 113 static unsigned long __init dt_push_bytes(struct blob *blob, char *data, int len)
 114 {
 115         unsigned long start = blob->next - (unsigned long)blob->data;
 116
 117         memcpy((char *)blob->next, data, len);
 118         blob->next = _ALIGN(blob->next + len, 4);
 119
 120         dt_check_blob(blob);
 121
 122         return start;
 123 }
 124
 125 static void __init dt_start_node(struct iseries_flat_dt *dt, char *name)
 126 {
 127         dt_push_u32(dt, OF_DT_BEGIN_NODE);
 128         dt_push_bytes(&dt->dt, name, strlen(name) + 1);
 129 }
 130
 131 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
 132
 133 static void __init dt_prop(struct iseries_flat_dt *dt, char *name,
 134                 char *data, int len)
 135 {
 136         unsigned long offset;
 137
 138         dt_push_u32(dt, OF_DT_PROP);
 139
 140         /* Length of the data */
 141         dt_push_u32(dt, len);
 142
 143         /* Put the property name in the string blob. */
 144         offset = dt_push_bytes(&dt->strings, name, strlen(name) + 1);
 145
 146         /* The offset of the properties name in the string blob. */
 147         dt_push_u32(dt, (u32)offset);
 148
 149         /* The actual data. */
 150         dt_push_bytes(&dt->dt, data, len);
 151 }
 152
 153 static void __init dt_prop_str(struct iseries_flat_dt *dt, char *name,
 154                 char *data)
 155 {
 156         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
 157 }
 158
 159 static void __init dt_prop_u32(struct iseries_flat_dt *dt, char *name, u32 data)
 160 {
 161         dt_prop(dt, name, (char *)&data, sizeof(u32));
 162 }
 163
 164 static void __init dt_prop_u64(struct iseries_flat_dt *dt, char *name, u64 data)
 165 {
 166         dt_prop(dt, name, (char *)&data, sizeof(u64));
 167 }
 168
 169 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt, char *name,
 170                 u64 *data, int n)
 171 {
 172         dt_prop(dt, name, (char *)data, sizeof(u64) * n);
 173 }
 174
 175 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt, char *name,
 176                 u32 *data, int n)
 177 {
 178         dt_prop(dt, name, (char *)data, sizeof(u32) * n);
 179 }
 180
 181 #ifdef notyet
 182 static void __init dt_prop_empty(struct iseries_flat_dt *dt, char *name)
 183 {
 184         dt_prop(dt, name, NULL, 0);
 185 }
 186 #endif
 187
 188 static void __init dt_cpus(struct iseries_flat_dt *dt)
 189 {
 190         unsigned char buf[32];
 191         unsigned char *p;
 192         unsigned int i, index;
 193         struct IoHriProcessorVpd *d;
 194         u32 pft_size[2];
 195
 196         /* yuck */
 197         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
 198         p = strchr(buf, ' ');
 199         if (!p) p = buf + strlen(buf);
 200
 201         dt_start_node(dt, "cpus");
 202         dt_prop_u32(dt, "#address-cells", 1);
 203         dt_prop_u32(dt, "#size-cells", 0);
 204
 205         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
 206         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
 207
 208         for (i = 0; i < NR_CPUS; i++) {
 209                 if (lppaca[i].dyn_proc_status >= 2)
 210                         continue;
 211
 212                 snprintf(p, 32 - (p - buf), "@%d", i);
 213                 dt_start_node(dt, buf);
 214
 215                 dt_prop_str(dt, "device_type", "cpu");
 216
 217                 index = lppaca[i].dyn_hv_phys_proc_index;
 218                 d = &xIoHriProcessorVpd[index];
 219
 220                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
 221                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
 222
 223                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
 224                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
 225
 226                 /* magic conversions to Hz copied from old code */
 227                 dt_prop_u32(dt, "clock-frequency",
 228                         ((1UL << 34) * 1000000) / d->xProcFreq);
 229                 dt_prop_u32(dt, "timebase-frequency",
 230                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
 231
 232                 dt_prop_u32(dt, "reg", i);
 233
 234                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
 235
 236                 dt_end_node(dt);
 237         }
 238
 239         dt_end_node(dt);
 240 }
 241
 242 static void __init dt_model(struct iseries_flat_dt *dt)
 243 {
 244         char buf[16] = "IBM,";
 245
 246         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
 247         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
 248         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
 249         buf[11] = '\0';
 250         dt_prop_str(dt, "system-id", buf);
 251
 252         /* "IBM," + machineType[0:4] */
 253         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
 254         buf[8] = '\0';
 255         dt_prop_str(dt, "model", buf);
 256
 257         dt_prop_str(dt, "compatible", "IBM,iSeries");
 258 }
 259
 260 static void __init dt_vdevices(struct iseries_flat_dt *dt)
 261 {
 262         u32 reg = 0;
 263         HvLpIndexMap vlan_map;
 264         int i;
 265         char buf[32];
 266
 267         dt_start_node(dt, "vdevice");
 268         dt_prop_str(dt, "device_type", "vdevice");
 269         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
 270         dt_prop_u32(dt, "#address-cells", 1);
 271         dt_prop_u32(dt, "#size-cells", 0);
 272
 273         snprintf(buf, sizeof(buf), "vty@%08x", reg);
 274         dt_start_node(dt, buf);
 275         dt_prop_str(dt, "device_type", "serial");
 276         dt_prop_u32(dt, "reg", reg);
 277         dt_end_node(dt);
 278         reg++;
 279
 280         snprintf(buf, sizeof(buf), "v-scsi@%08x", reg);
 281         dt_start_node(dt, buf);
 282         dt_prop_str(dt, "device_type", "vscsi");
 283         dt_prop_str(dt, "compatible", "IBM,v-scsi");
 284         dt_prop_u32(dt, "reg", reg);
 285         dt_end_node(dt);
 286         reg++;
 287
 288         vlan_map = HvLpConfig_getVirtualLanIndexMap();
 289         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
 290                 unsigned char mac_addr[ETH_ALEN];
 291
 292                 if ((vlan_map & (0x8000 >> i)) == 0)
 293                         continue;
 294                 snprintf(buf, 32, "l-lan@%08x", reg + i);
 295                 dt_start_node(dt, buf);
 296                 dt_prop_str(dt, "device_type", "network");
 297                 dt_prop_str(dt, "compatible", "IBM,iSeries-l-lan");
 298                 dt_prop_u32(dt, "reg", reg + i);
 299                 dt_prop_u32(dt, "linux,unit_address", i);
 300
 301                 mac_addr[0] = 0x02;
 302                 mac_addr[1] = 0x01;
 303                 mac_addr[2] = 0xff;
 304                 mac_addr[3] = i;
 305                 mac_addr[4] = 0xff;
 306                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
 307                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
 308                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
 309                 dt_prop_u32(dt, "max-frame-size", 9000);
 310                 dt_prop_u32(dt, "address-bits", 48);
 311
 312                 dt_end_node(dt);
 313         }
 314         reg += HVMAXARCHITECTEDVIRTUALLANS;
 315
 316         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++) {
 317                 snprintf(buf, 32, "viodasd@%08x", reg + i);
 318                 dt_start_node(dt, buf);
 319                 dt_prop_str(dt, "device_type", "block");
 320                 dt_prop_str(dt, "compatible", "IBM,iSeries-viodasd");
 321                 dt_prop_u32(dt, "reg", reg + i);
 322                 dt_prop_u32(dt, "linux,unit_address", i);
 323                 dt_end_node(dt);
 324         }
 325         reg += HVMAXARCHITECTEDVIRTUALDISKS;
 326         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++) {
 327                 snprintf(buf, 32, "viocd@%08x", reg + i);
 328                 dt_start_node(dt, buf);
 329                 dt_prop_str(dt, "device_type", "block");
 330                 dt_prop_str(dt, "compatible", "IBM,iSeries-viocd");
 331                 dt_prop_u32(dt, "reg", reg + i);
 332                 dt_prop_u32(dt, "linux,unit_address", i);
 333                 dt_end_node(dt);
 334         }
 335         reg += HVMAXARCHITECTEDVIRTUALCDROMS;
 336         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++) {
 337                 snprintf(buf, 32, "viotape@%08x", reg + i);
 338                 dt_start_node(dt, buf);
 339                 dt_prop_str(dt, "device_type", "byte");
 340                 dt_prop_str(dt, "compatible", "IBM,iSeries-viotape");
 341                 dt_prop_u32(dt, "reg", reg + i);
 342                 dt_prop_u32(dt, "linux,unit_address", i);
 343                 dt_end_node(dt);
 344         }
 345
 346         dt_end_node(dt);
 347 }
 348
 349 struct pci_class_name {
 350         u16 code;
 351         char *name;
 352         char *type;
 353 };
 354
 355 static struct pci_class_name __initdata pci_class_name[] = {
 356         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", "network" },
 357 };
 358
 359 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
 360 {
 361         struct pci_class_name *cp;
 362
 363         for (cp = pci_class_name;
 364                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
 365                 if (cp->code == class_code)
 366                         return cp;
 367         return NULL;
 368 }
 369
 370 /*
 371  * This assumes that the node slot is always on the primary bus!
 372  */
 373 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
 374                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
 375 {
 376         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
 377         u16 vendor_id;
 378         u16 device_id;
 379         u32 class_id;
 380         int err;
 381         char buf[32];
 382         u32 reg[5];
 383         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
 384         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
 385         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
 386         u8 devfn;
 387         struct pci_class_name *cp;
 388
 389         /*
 390          * Connect all functions of any device found.
 391          */
 392         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
 393                 for (function = 0; function < 8; function++) {
 394                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
 395                                         function);
 396                         err = HvCallXm_connectBusUnit(bus, sub_bus,
 397                                         agent_id, 0);
 398                         if (err) {
 399                                 if (err != 0x302)
 400                                         printk(KERN_DEBUG
 401                                                 "connectBusUnit(%x, %x, %x) "
 402                                                 "== %x\n",
 403                                                 bus, sub_bus, agent_id, err);
 404                                 continue;
 405                         }
 406
 407                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 408                                         PCI_VENDOR_ID, &vendor_id);
 409                         if (err) {
 410                                 printk(KERN_DEBUG
 411                                         "ReadVendor(%x, %x, %x) == %x\n",
 412                                         bus, sub_bus, agent_id, err);
 413                                 continue;
 414                         }
 415                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 416                                         PCI_DEVICE_ID, &device_id);
 417                         if (err) {
 418                                 printk(KERN_DEBUG
 419                                         "ReadDevice(%x, %x, %x) == %x\n",
 420                                         bus, sub_bus, agent_id, err);
 421                                 continue;
 422                         }
 423                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
 424                                         PCI_CLASS_REVISION , &class_id);
 425                         if (err) {
 426                                 printk(KERN_DEBUG
 427                                         "ReadClass(%x, %x, %x) == %x\n",
 428                                         bus, sub_bus, agent_id, err);
 429                                 continue;
 430                         }
 431
 432                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
 433                                         function);
 434                         cp = dt_find_pci_class_name(class_id >> 16);
 435                         if (cp && cp->name)
 436                                 strncpy(buf, cp->name, sizeof(buf) - 1);
 437                         else
 438                                 snprintf(buf, sizeof(buf), "pci%x,%x",
 439                                                 vendor_id, device_id);
 440                         buf[sizeof(buf) - 1] = '\0';
 441                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 442                                         "@%x", PCI_SLOT(devfn));
 443                         buf[sizeof(buf) - 1] = '\0';
 444                         if (function != 0)
 445                                 snprintf(buf + strlen(buf),
 446                                         sizeof(buf) - strlen(buf),
 447                                         ",%x", function);
 448                         dt_start_node(dt, buf);
 449                         reg[0] = (bus << 16) | (devfn << 8);
 450                         reg[1] = 0;
 451                         reg[2] = 0;
 452                         reg[3] = 0;
 453                         reg[4] = 0;
 454                         dt_prop_u32_list(dt, "reg", reg, 5);
 455                         if (cp && (cp->type || cp->name))
 456                                 dt_prop_str(dt, "device_type",
 457                                         cp->type ? cp->type : cp->name);
 458                         dt_prop_u32(dt, "vendor-id", vendor_id);
 459                         dt_prop_u32(dt, "device-id", device_id);
 460                         dt_prop_u32(dt, "class-code", class_id >> 8);
 461                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
 462                         dt_prop_u32(dt, "linux,subbus", sub_bus);
 463                         dt_prop_u32(dt, "linux,agent-id", agent_id);
 464                         dt_prop_u32(dt, "linux,logical-slot-number",
 465                                         bridge_info->logicalSlotNumber);
 466                         dt_end_node(dt);
 467
 468                 }
 469         }
 470 }
 471
 472 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
 473                 HvSubBusNumber sub_bus, int id_sel)
 474 {
 475         struct HvCallPci_BridgeInfo bridge_info;
 476         HvAgentId agent_id;
 477         int function;
 478         int ret;
 479
 480         /* Note: hvSubBus and irq is always be 0 at this level! */
 481         for (function = 0; function < 8; ++function) {
 482                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
 483                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
 484                 if (ret != 0) {
 485                         if (ret != 0xb)
 486                                 printk(KERN_DEBUG "connectBusUnit(%x, %x, %x) "
 487                                                 "== %x\n",
 488                                                 bus, sub_bus, agent_id, ret);
 489                         continue;
 490                 }
 491                 printk("found device at bus %d idsel %d func %d (AgentId %x)\n",
 492                                 bus, id_sel, function, agent_id);
 493                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
 494                                 iseries_hv_addr(&bridge_info),
 495                                 sizeof(struct HvCallPci_BridgeInfo));
 496                 if (ret != 0)
 497                         continue;
 498                 printk("bridge info: type %x subbus %x "
 499                         "maxAgents %x maxsubbus %x logslot %x\n",
 500                         bridge_info.busUnitInfo.deviceType,
 501                         bridge_info.subBusNumber,
 502                         bridge_info.maxAgents,
 503                         bridge_info.maxSubBusNumber,
 504                         bridge_info.logicalSlotNumber);
 505                 if (bridge_info.busUnitInfo.deviceType ==
 506                                 HvCallPci_BridgeDevice)
 507                         scan_bridge_slot(dt, bus, &bridge_info);
 508                 else
 509                         printk("PCI: Invalid Bridge Configuration(0x%02X)",
 510                                 bridge_info.busUnitInfo.deviceType);
 511         }
 512 }
 513
 514 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
 515 {
 516         struct HvCallPci_DeviceInfo dev_info;
 517         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
 518         int err;
 519         int id_sel;
 520         const int max_agents = 8;
 521
 522         /*
 523          * Probe for EADs Bridges
 524          */
 525         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
 526                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
 527                                 iseries_hv_addr(&dev_info),
 528                                 sizeof(struct HvCallPci_DeviceInfo));
 529                 if (err) {
 530                         if (err != 0x302)
 531                                 printk(KERN_DEBUG "getDeviceInfo(%x, %x, %x) "
 532                                                 "== %x\n",
 533                                                 bus, sub_bus, id_sel, err);
 534                         continue;
 535                 }
 536                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
 537                         printk(KERN_DEBUG "PCI: Invalid System Configuration"
 538                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
 539                                         dev_info.deviceType, bus, id_sel);
 540                         continue;
 541                 }
 542                 scan_bridge(dt, bus, sub_bus, id_sel);
 543         }
 544 }
 545
 546 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
 547 {
 548         HvBusNumber bus;
 549         char buf[32];
 550         u32 buses[2];
 551         int phb_num = 0;
 552
 553         /* Check all possible buses. */
 554         for (bus = 0; bus < 256; bus++) {
 555                 int err = HvCallXm_testBus(bus);
 556
 557                 if (err) {
 558                         /*
 559                          * Check for Unexpected Return code, a clue that
 560                          * something has gone wrong.
 561                          */
 562                         if (err != 0x0301)
 563                                 printk(KERN_ERR "Unexpected Return on Probe"
 564                                                 "(0x%02X): 0x%04X", bus, err);
 565                         continue;
 566                 }
 567                 printk("bus %d appears to exist\n", bus);
 568                 snprintf(buf, 32, "pci@%d", phb_num);
 569                 dt_start_node(dt, buf);
 570                 dt_prop_str(dt, "device_type", "pci");
 571                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
 572                 dt_prop_u32(dt, "#address-cells", 3);
 573                 dt_prop_u32(dt, "#size-cells", 2);
 574                 buses[0] = buses[1] = bus;
 575                 dt_prop_u32_list(dt, "bus-range", buses, 2);
 576                 scan_phb(dt, bus);
 577                 dt_end_node(dt);
 578                 phb_num++;
 579         }
 580 }
 581
 582 void * __init build_flat_dt(unsigned long phys_mem_size)
 583 {
 584         u64 tmp[2];
 585
 586         dt_init(&iseries_dt);
 587
 588         dt_start_node(&iseries_dt, "");
 589
 590         dt_prop_u32(&iseries_dt, "#address-cells", 2);
 591         dt_prop_u32(&iseries_dt, "#size-cells", 2);
 592         dt_model(&iseries_dt);
 593
 594         /* /memory */
 595         dt_start_node(&iseries_dt, "memory@0");
 596         dt_prop_str(&iseries_dt, "name", "memory");
 597         dt_prop_str(&iseries_dt, "device_type", "memory");
 598         tmp[0] = 0;
 599         tmp[1] = phys_mem_size;
 600         dt_prop_u64_list(&iseries_dt, "reg", tmp, 2);
 601         dt_end_node(&iseries_dt);
 602
 603         /* /chosen */
 604         dt_start_node(&iseries_dt, "chosen");
 605         dt_prop_str(&iseries_dt, "bootargs", cmd_line);
 606         dt_end_node(&iseries_dt);
 607
 608         dt_cpus(&iseries_dt);
 609
 610         dt_vdevices(&iseries_dt);
 611         dt_pci_devices(&iseries_dt);
 612
 613         dt_end_node(&iseries_dt);
 614
 615         dt_push_u32(&iseries_dt, OF_DT_END);
 616
 617         return &iseries_dt;
 618 }