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 __maybe_unused dt_prop_u64(struct iseries_flat_dt *dt,
 208                                               const char *name,
 209                 u64 data)
 210 {
 211         dt_prop(dt, name, &data, sizeof(u64));
 212 }
 213
 214 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
 215                 const char *name, u64 *data, int n)
 216 {
 217         dt_prop(dt, name, data, sizeof(u64) * n);
 218 }
 219
 220 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
 221                 const char *name, u32 *data, int n)
 222 {
 223         dt_prop(dt, name, data, sizeof(u32) * n);
 224 }
 225
 226 #ifdef notyet
 227 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
 228 {
 229         dt_prop(dt, name, NULL, 0);
 230 }
 231 #endif
 232
 233 static void __init dt_cpus(struct iseries_flat_dt *dt)
 234 {
 235         unsigned char buf[32];
 236         unsigned char *p;
 237         unsigned int i, index;
 238         struct IoHriProcessorVpd *d;
 239         u32 pft_size[2];
 240
 241         /* yuck */
 242         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
 243         p = strchr(buf, ' ');
 244         if (!p) p = buf + strlen(buf);
 245
 246         dt_start_node(dt, "cpus");
 247         dt_prop_u32(dt, "#address-cells", 1);
 248         dt_prop_u32(dt, "#size-cells", 0);
 249
 250         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
 251         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
 252
 253         for (i = 0; i < NR_CPUS; i++) {
 254                 if (lppaca[i].dyn_proc_status >= 2)
 255                         continue;
 256
 257                 snprintf(p, 32 - (p - buf), "@%d", i);
 258                 dt_start_node(dt, buf);
 259
 260                 dt_prop_str(dt, "device_type", device_type_cpu);
 261
 262                 index = lppaca[i].dyn_hv_phys_proc_index;
 263                 d = &xIoHriProcessorVpd[index];
 264
 265                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
 266                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
 267
 268                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
 269                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
 270
 271                 /* magic conversions to Hz copied from old code */
 272                 dt_prop_u32(dt, "clock-frequency",
 273                         ((1UL << 34) * 1000000) / d->xProcFreq);
 274                 dt_prop_u32(dt, "timebase-frequency",
 275                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
 276
 277                 dt_prop_u32(dt, "reg", i);
 278
 279                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
 280
 281                 dt_end_node(dt);
 282         }
 283
 284         dt_end_node(dt);
 285 }
 286
 287 static void __init dt_model(struct iseries_flat_dt *dt)
 288 {
 289         char buf[16] = "IBM,";
 290
 291         /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
 292         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
 293         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
 294         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
 295         buf[11] = '\0';
 296         dt_prop_str(dt, "system-id", buf);
 297
 298         /* "IBM," + machineType[0:4] */
 299         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
 300         buf[8] = '\0';
 301         dt_prop_str(dt, "model", buf);
 302
 303         dt_prop_str(dt, "compatible", "IBM,iSeries");
 304         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
 305 }
 306
 307 static void __init dt_initrd(struct iseries_flat_dt *dt)
 308 {
 309 #ifdef CONFIG_BLK_DEV_INITRD
 310         if (naca.xRamDisk) {
 311                 dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
 312                 dt_prop_u64(dt, "linux,initrd-end",
 313                         (u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
 314         }
 315 #endif
 316 }
 317
 318 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
 319                 const char *name, u32 reg, int unit,
 320                 const char *type, const char *compat, int end)
 321 {
 322         char buf[32];
 323
 324         snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
 325         dt_start_node(dt, buf);
 326         dt_prop_str(dt, "device_type", type);
 327         if (compat)
 328                 dt_prop_str(dt, "compatible", compat);
 329         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
 330         if (unit >= 0)
 331                 dt_prop_u32(dt, "linux,unit_address", unit);
 332         if (end)
 333                 dt_end_node(dt);
 334 }
 335
 336 static void __init dt_vdevices(struct iseries_flat_dt *dt)
 337 {
 338         u32 reg = 0;
 339         HvLpIndexMap vlan_map;
 340         int i;
 341
 342         dt_start_node(dt, "vdevice");
 343         dt_prop_str(dt, "device_type", device_type_vdevice);
 344         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
 345         dt_prop_u32(dt, "#address-cells", 1);
 346         dt_prop_u32(dt, "#size-cells", 0);
 347
 348         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
 349                         "IBM,iSeries-vty", 1);
 350         reg++;
 351
 352         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
 353                         "IBM,v-scsi", 1);
 354         reg++;
 355
 356         vlan_map = HvLpConfig_getVirtualLanIndexMap();
 357         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
 358                 unsigned char mac_addr[ETH_ALEN];
 359
 360                 if ((vlan_map & (0x8000 >> i)) == 0)
 361                         continue;
 362                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
 363                                 "IBM,iSeries-l-lan", 0);
 364                 mac_addr[0] = 0x02;
 365                 mac_addr[1] = 0x01;
 366                 mac_addr[2] = 0xff;
 367                 mac_addr[3] = i;
 368                 mac_addr[4] = 0xff;
 369                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
 370                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
 371                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
 372                 dt_prop_u32(dt, "max-frame-size", 9000);
 373                 dt_prop_u32(dt, "address-bits", 48);
 374
 375                 dt_end_node(dt);
 376         }
 377
 378         dt_end_node(dt);
 379 }
 380
 381 struct pci_class_name {
 382         u16 code;
 383         const char *name;
 384         const char *type;
 385 };
 386
 387 static struct pci_class_name __initdata pci_class_name[] = {
 388         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
 389 };
 390
 391 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
 392 {
 393         struct pci_class_name *cp;
 394
 395         for (cp = pci_class_name;
 396                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
 397                 if (cp->code == class_code)
 398                         return cp;
 399         return NULL;
 400 }
 401
 402 /*
 403  * This assumes that the node slot is always on the primary bus!
 404  */
 405 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
 406                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
 407 {
 408         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
 409         u16 vendor_id;
 410         u16 device_id;
 411         u32 class_id;
 412         int err;
 413         char buf[32];
 414         u32 reg[5];
 415         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
 416         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
 417         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
 418         u8 devfn;
 419         struct pci_class_name *cp;
 420
 421         /*
 422          * Connect all functions of any device found.
 423          */
 424         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
 425                 for (function = 0; function < 8; function++) {
 426                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
 427                                         function);
 428                         err = HvCallXm_connectBusUnit(bus, sub_bus,
 429                                         agent_id, 0);
 430                         if (err) {
 431                                 if (err != 0x302)
 432                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
 433                                                 bus, sub_bus, agent_id, err);
 434                                 continue;
 435                         }
 436
 437                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 438                                         PCI_VENDOR_ID, &vendor_id);
 439                         if (err) {
 440                                 DBG("ReadVendor(%x, %x, %x) %x\n",
 441                                         bus, sub_bus, agent_id, err);
 442                                 continue;
 443                         }
 444                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
 445                                         PCI_DEVICE_ID, &device_id);
 446                         if (err) {
 447                                 DBG("ReadDevice(%x, %x, %x) %x\n",
 448                                         bus, sub_bus, agent_id, err);
 449                                 continue;
 450                         }
 451                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
 452                                         PCI_CLASS_REVISION , &class_id);
 453                         if (err) {
 454                                 DBG("ReadClass(%x, %x, %x) %x\n",
 455                                         bus, sub_bus, agent_id, err);
 456                                 continue;
 457                         }
 458
 459                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
 460                                         function);
 461                         cp = dt_find_pci_class_name(class_id >> 16);
 462                         if (cp && cp->name)
 463                                 strncpy(buf, cp->name, sizeof(buf) - 1);
 464                         else
 465                                 snprintf(buf, sizeof(buf), "pci%x,%x",
 466                                                 vendor_id, device_id);
 467                         buf[sizeof(buf) - 1] = '\0';
 468                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 469                                         "@%x", PCI_SLOT(devfn));
 470                         buf[sizeof(buf) - 1] = '\0';
 471                         if (function != 0)
 472                                 snprintf(buf + strlen(buf),
 473                                         sizeof(buf) - strlen(buf),
 474                                         ",%x", function);
 475                         dt_start_node(dt, buf);
 476                         reg[0] = (bus << 16) | (devfn << 8);
 477                         reg[1] = 0;
 478                         reg[2] = 0;
 479                         reg[3] = 0;
 480                         reg[4] = 0;
 481                         dt_prop_u32_list(dt, "reg", reg, 5);
 482                         if (cp && (cp->type || cp->name))
 483                                 dt_prop_str(dt, "device_type",
 484                                         cp->type ? cp->type : cp->name);
 485                         dt_prop_u32(dt, "vendor-id", vendor_id);
 486                         dt_prop_u32(dt, "device-id", device_id);
 487                         dt_prop_u32(dt, "class-code", class_id >> 8);
 488                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
 489                         dt_prop_u32(dt, "linux,subbus", sub_bus);
 490                         dt_prop_u32(dt, "linux,agent-id", agent_id);
 491                         dt_prop_u32(dt, "linux,logical-slot-number",
 492                                         bridge_info->logicalSlotNumber);
 493                         dt_end_node(dt);
 494
 495                 }
 496         }
 497 }
 498
 499 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
 500                 HvSubBusNumber sub_bus, int id_sel)
 501 {
 502         struct HvCallPci_BridgeInfo bridge_info;
 503         HvAgentId agent_id;
 504         int function;
 505         int ret;
 506
 507         /* Note: hvSubBus and irq is always be 0 at this level! */
 508         for (function = 0; function < 8; ++function) {
 509                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
 510                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
 511                 if (ret != 0) {
 512                         if (ret != 0xb)
 513                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
 514                                                 bus, sub_bus, agent_id, ret);
 515                         continue;
 516                 }
 517                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
 518                                 bus, id_sel, function, agent_id);
 519                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
 520                                 iseries_hv_addr(&bridge_info),
 521                                 sizeof(struct HvCallPci_BridgeInfo));
 522                 if (ret != 0)
 523                         continue;
 524                 DBG("bridge info: type %x subbus %x "
 525                         "maxAgents %x maxsubbus %x logslot %x\n",
 526                         bridge_info.busUnitInfo.deviceType,
 527                         bridge_info.subBusNumber,
 528                         bridge_info.maxAgents,
 529                         bridge_info.maxSubBusNumber,
 530                         bridge_info.logicalSlotNumber);
 531                 if (bridge_info.busUnitInfo.deviceType ==
 532                                 HvCallPci_BridgeDevice)
 533                         scan_bridge_slot(dt, bus, &bridge_info);
 534                 else
 535                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
 536                                 bridge_info.busUnitInfo.deviceType);
 537         }
 538 }
 539
 540 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
 541 {
 542         struct HvCallPci_DeviceInfo dev_info;
 543         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
 544         int err;
 545         int id_sel;
 546         const int max_agents = 8;
 547
 548         /*
 549          * Probe for EADs Bridges
 550          */
 551         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
 552                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
 553                                 iseries_hv_addr(&dev_info),
 554                                 sizeof(struct HvCallPci_DeviceInfo));
 555                 if (err) {
 556                         if (err != 0x302)
 557                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
 558                                                 bus, sub_bus, id_sel, err);
 559                         continue;
 560                 }
 561                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
 562                         DBG("PCI: Invalid System Configuration"
 563                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
 564                                         dev_info.deviceType, bus, id_sel);
 565                         continue;
 566                 }
 567                 scan_bridge(dt, bus, sub_bus, id_sel);
 568         }
 569 }
 570
 571 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
 572 {
 573         HvBusNumber bus;
 574         char buf[32];
 575         u32 buses[2];
 576         int phb_num = 0;
 577
 578         /* Check all possible buses. */
 579         for (bus = 0; bus < 256; bus++) {
 580                 int err = HvCallXm_testBus(bus);
 581
 582                 if (err) {
 583                         /*
 584                          * Check for Unexpected Return code, a clue that
 585                          * something has gone wrong.
 586                          */
 587                         if (err != 0x0301)
 588                                 DBG("Unexpected Return on Probe(0x%02X) "
 589                                                 "0x%04X\n", bus, err);
 590                         continue;
 591                 }
 592                 DBG("bus %d appears to exist\n", bus);
 593                 snprintf(buf, 32, "pci@%d", phb_num);
 594                 dt_start_node(dt, buf);
 595                 dt_prop_str(dt, "device_type", device_type_pci);
 596                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
 597                 dt_prop_u32(dt, "#address-cells", 3);
 598                 dt_prop_u32(dt, "#size-cells", 2);
 599                 buses[0] = buses[1] = bus;
 600                 dt_prop_u32_list(dt, "bus-range", buses, 2);
 601                 scan_phb(dt, bus);
 602                 dt_end_node(dt);
 603                 phb_num++;
 604         }
 605 }
 606
 607 static void dt_finish(struct iseries_flat_dt *dt)
 608 {
 609         dt_push_u32(dt, OF_DT_END);
 610         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
 611         klimit = ALIGN((unsigned long)dt_data, 8);
 612 }
 613
 614 void * __init build_flat_dt(unsigned long phys_mem_size)
 615 {
 616         struct iseries_flat_dt *iseries_dt;
 617         u64 tmp[2];
 618
 619         iseries_dt = dt_init();
 620
 621         dt_start_node(iseries_dt, "");
 622
 623         dt_prop_u32(iseries_dt, "#address-cells", 2);
 624         dt_prop_u32(iseries_dt, "#size-cells", 2);
 625         dt_model(iseries_dt);
 626
 627         /* /memory */
 628         dt_start_node(iseries_dt, "memory@0");
 629         dt_prop_str(iseries_dt, "device_type", device_type_memory);
 630         tmp[0] = 0;
 631         tmp[1] = phys_mem_size;
 632         dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
 633         dt_end_node(iseries_dt);
 634
 635         /* /chosen */
 636         dt_start_node(iseries_dt, "chosen");
 637         dt_prop_str(iseries_dt, "bootargs", cmd_line);
 638         dt_initrd(iseries_dt);
 639         dt_end_node(iseries_dt);
 640
 641         dt_cpus(iseries_dt);
 642
 643         dt_vdevices(iseries_dt);
 644         dt_pci_devices(iseries_dt);
 645
 646         dt_end_node(iseries_dt);
 647
 648         dt_finish(iseries_dt);
 649
 650         return iseries_dt;
 651 }