linux/arch/powerpc/platforms/iseries/dt.c
<<
>>
Prefs
   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 */
  56extern char __dt_strings_start[];
  57extern char __dt_strings_end[];
  58
  59#define DS(s)   ({      \
  60        static const char __s[] __attribute__((section(".dt_strings"))) = s; \
  61        __s;            \
  62})
  63
  64struct iseries_flat_dt {
  65        struct boot_param_header header;
  66        u64 reserve_map[2];
  67};
  68
  69static 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 */
  75static char __initdata device_type_cpu[] = "cpu";
  76static char __initdata device_type_memory[] = "memory";
  77static char __initdata device_type_serial[] = "serial";
  78static char __initdata device_type_network[] = "network";
  79static char __initdata device_type_pci[] = "pci";
  80static char __initdata device_type_vdevice[] = "vdevice";
  81static char __initdata device_type_vscsi[] = "vscsi";
  82
  83
  84/* EBCDIC to ASCII conversion routines */
  85
  86static 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
 107static 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
 120static 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
 151static 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
 158static 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
 165static 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
 172static 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
 180static 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
 203static 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
 210static 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
 225static 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_LPPACAS; i++) {
 246                if (lppaca[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[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
 279static 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
 299static 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
 310static 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
 328static 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
 373struct pci_class_name {
 374        u16 code;
 375        const char *name;
 376        const char *type;
 377};
 378
 379static struct pci_class_name __initdata pci_class_name[] = {
 380        { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
 381};
 382
 383static 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 */
 397static 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
 491static 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
 532static 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
 563static 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
 599static 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
 606void * __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}
 644