Merge branch 'master' into upstream
[linux-2.6] / 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
45 #ifdef DEBUG
46 #define DBG(fmt...) udbg_printf(fmt)
47 #else
48 #define DBG(fmt...)
49 #endif
50
51 /*
52  * These are created by the linker script at the start and end
53  * of the section containing all the strings from this file.
54  */
55 extern char __dt_strings_start[];
56 extern char __dt_strings_end[];
57
58 struct iseries_flat_dt {
59         struct boot_param_header header;
60         u64 reserve_map[2];
61 };
62
63 static void * __initdata dt_data;
64
65 /*
66  * Putting these strings here keeps them out of the section
67  * that we rename to .dt_strings using objcopy and capture
68  * for the strings blob of the flattened device tree.
69  */
70 static char __initdata device_type_cpu[] = "cpu";
71 static char __initdata device_type_memory[] = "memory";
72 static char __initdata device_type_serial[] = "serial";
73 static char __initdata device_type_network[] = "network";
74 static char __initdata device_type_block[] = "block";
75 static char __initdata device_type_byte[] = "byte";
76 static char __initdata device_type_pci[] = "pci";
77 static char __initdata device_type_vdevice[] = "vdevice";
78 static char __initdata device_type_vscsi[] = "vscsi";
79
80
81 /* EBCDIC to ASCII conversion routines */
82
83 static unsigned char __init e2a(unsigned char x)
84 {
85         switch (x) {
86         case 0x81 ... 0x89:
87                 return x - 0x81 + 'a';
88         case 0x91 ... 0x99:
89                 return x - 0x91 + 'j';
90         case 0xA2 ... 0xA9:
91                 return x - 0xA2 + 's';
92         case 0xC1 ... 0xC9:
93                 return x - 0xC1 + 'A';
94         case 0xD1 ... 0xD9:
95                 return x - 0xD1 + 'J';
96         case 0xE2 ... 0xE9:
97                 return x - 0xE2 + 'S';
98         case 0xF0 ... 0xF9:
99                 return x - 0xF0 + '0';
100         }
101         return ' ';
102 }
103
104 static unsigned char * __init strne2a(unsigned char *dest,
105                 const unsigned char *src, size_t n)
106 {
107         int i;
108
109         n = strnlen(src, n);
110
111         for (i = 0; i < n; i++)
112                 dest[i] = e2a(src[i]);
113
114         return dest;
115 }
116
117 static struct iseries_flat_dt * __init dt_init(void)
118 {
119         struct iseries_flat_dt *dt;
120         unsigned long str_len;
121
122         str_len = __dt_strings_end - __dt_strings_start;
123         dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
124         dt->header.off_mem_rsvmap =
125                 offsetof(struct iseries_flat_dt, reserve_map);
126         dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
127         dt->header.off_dt_struct = dt->header.off_dt_strings
128                 + ALIGN(str_len, 8);
129         dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
130         dt->header.dt_strings_size = str_len;
131
132         /* There is no notion of hardware cpu id on iSeries */
133         dt->header.boot_cpuid_phys = smp_processor_id();
134
135         memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
136                         str_len);
137
138         dt->header.magic = OF_DT_HEADER;
139         dt->header.version = 0x10;
140         dt->header.last_comp_version = 0x10;
141
142         dt->reserve_map[0] = 0;
143         dt->reserve_map[1] = 0;
144
145         return dt;
146 }
147
148 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
149 {
150         *((u32 *)dt_data) = value;
151         dt_data += sizeof(u32);
152 }
153
154 #ifdef notyet
155 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
156 {
157         *((u64 *)dt_data) = value;
158         dt_data += sizeof(u64);
159 }
160 #endif
161
162 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
163                 int len)
164 {
165         memcpy(dt_data, data, len);
166         dt_data += ALIGN(len, 4);
167 }
168
169 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
170 {
171         dt_push_u32(dt, OF_DT_BEGIN_NODE);
172         dt_push_bytes(dt, name, strlen(name) + 1);
173 }
174
175 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
176
177 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
178                 const void *data, int len)
179 {
180         unsigned long offset;
181
182         dt_push_u32(dt, OF_DT_PROP);
183
184         /* Length of the data */
185         dt_push_u32(dt, len);
186
187         offset = name - __dt_strings_start;
188
189         /* The offset of the properties name in the string blob. */
190         dt_push_u32(dt, (u32)offset);
191
192         /* The actual data. */
193         dt_push_bytes(dt, data, len);
194 }
195
196 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
197                 const char *data)
198 {
199         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
200 }
201
202 static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
203                 u32 data)
204 {
205         dt_prop(dt, name, &data, sizeof(u32));
206 }
207
208 #ifdef notyet
209 static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
210                 u64 data)
211 {
212         dt_prop(dt, name, &data, sizeof(u64));
213 }
214 #endif
215
216 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
217                 const char *name, u64 *data, int n)
218 {
219         dt_prop(dt, name, data, sizeof(u64) * n);
220 }
221
222 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
223                 const char *name, u32 *data, int n)
224 {
225         dt_prop(dt, name, data, sizeof(u32) * n);
226 }
227
228 #ifdef notyet
229 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
230 {
231         dt_prop(dt, name, NULL, 0);
232 }
233 #endif
234
235 static void __init dt_cpus(struct iseries_flat_dt *dt)
236 {
237         unsigned char buf[32];
238         unsigned char *p;
239         unsigned int i, index;
240         struct IoHriProcessorVpd *d;
241         u32 pft_size[2];
242
243         /* yuck */
244         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
245         p = strchr(buf, ' ');
246         if (!p) p = buf + strlen(buf);
247
248         dt_start_node(dt, "cpus");
249         dt_prop_u32(dt, "#address-cells", 1);
250         dt_prop_u32(dt, "#size-cells", 0);
251
252         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
253         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
254
255         for (i = 0; i < NR_CPUS; i++) {
256                 if (lppaca[i].dyn_proc_status >= 2)
257                         continue;
258
259                 snprintf(p, 32 - (p - buf), "@%d", i);
260                 dt_start_node(dt, buf);
261
262                 dt_prop_str(dt, "device_type", device_type_cpu);
263
264                 index = lppaca[i].dyn_hv_phys_proc_index;
265                 d = &xIoHriProcessorVpd[index];
266
267                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
268                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
269
270                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
271                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
272
273                 /* magic conversions to Hz copied from old code */
274                 dt_prop_u32(dt, "clock-frequency",
275                         ((1UL << 34) * 1000000) / d->xProcFreq);
276                 dt_prop_u32(dt, "timebase-frequency",
277                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
278
279                 dt_prop_u32(dt, "reg", i);
280
281                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
282
283                 dt_end_node(dt);
284         }
285
286         dt_end_node(dt);
287 }
288
289 static void __init dt_model(struct iseries_flat_dt *dt)
290 {
291         char buf[16] = "IBM,";
292
293         /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
294         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
295         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
296         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
297         buf[11] = '\0';
298         dt_prop_str(dt, "system-id", buf);
299
300         /* "IBM," + machineType[0:4] */
301         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
302         buf[8] = '\0';
303         dt_prop_str(dt, "model", buf);
304
305         dt_prop_str(dt, "compatible", "IBM,iSeries");
306         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
307 }
308
309 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
310                 const char *name, u32 reg, int unit,
311                 const char *type, const char *compat, int end)
312 {
313         char buf[32];
314
315         snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
316         dt_start_node(dt, buf);
317         dt_prop_str(dt, "device_type", type);
318         if (compat)
319                 dt_prop_str(dt, "compatible", compat);
320         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
321         if (unit >= 0)
322                 dt_prop_u32(dt, "linux,unit_address", unit);
323         if (end)
324                 dt_end_node(dt);
325 }
326
327 static void __init dt_vdevices(struct iseries_flat_dt *dt)
328 {
329         u32 reg = 0;
330         HvLpIndexMap vlan_map;
331         int i;
332
333         dt_start_node(dt, "vdevice");
334         dt_prop_str(dt, "device_type", device_type_vdevice);
335         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
336         dt_prop_u32(dt, "#address-cells", 1);
337         dt_prop_u32(dt, "#size-cells", 0);
338
339         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
340                         "IBM,iSeries-vty", 1);
341         reg++;
342
343         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
344                         "IBM,v-scsi", 1);
345         reg++;
346
347         vlan_map = HvLpConfig_getVirtualLanIndexMap();
348         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
349                 unsigned char mac_addr[ETH_ALEN];
350
351                 if ((vlan_map & (0x8000 >> i)) == 0)
352                         continue;
353                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
354                                 "IBM,iSeries-l-lan", 0);
355                 mac_addr[0] = 0x02;
356                 mac_addr[1] = 0x01;
357                 mac_addr[2] = 0xff;
358                 mac_addr[3] = i;
359                 mac_addr[4] = 0xff;
360                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
361                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
362                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
363                 dt_prop_u32(dt, "max-frame-size", 9000);
364                 dt_prop_u32(dt, "address-bits", 48);
365
366                 dt_end_node(dt);
367         }
368         reg += HVMAXARCHITECTEDVIRTUALLANS;
369
370         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
371                 dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
372                                 "IBM,iSeries-viodasd", 1);
373         reg += HVMAXARCHITECTEDVIRTUALDISKS;
374
375         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
376                 dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
377                                 "IBM,iSeries-viocd", 1);
378         reg += HVMAXARCHITECTEDVIRTUALCDROMS;
379
380         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
381                 dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
382                                 "IBM,iSeries-viotape", 1);
383
384         dt_end_node(dt);
385 }
386
387 struct pci_class_name {
388         u16 code;
389         const char *name;
390         const char *type;
391 };
392
393 static struct pci_class_name __initdata pci_class_name[] = {
394         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
395 };
396
397 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
398 {
399         struct pci_class_name *cp;
400
401         for (cp = pci_class_name;
402                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
403                 if (cp->code == class_code)
404                         return cp;
405         return NULL;
406 }
407
408 /*
409  * This assumes that the node slot is always on the primary bus!
410  */
411 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
412                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
413 {
414         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
415         u16 vendor_id;
416         u16 device_id;
417         u32 class_id;
418         int err;
419         char buf[32];
420         u32 reg[5];
421         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
422         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
423         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
424         u8 devfn;
425         struct pci_class_name *cp;
426
427         /*
428          * Connect all functions of any device found.
429          */
430         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
431                 for (function = 0; function < 8; function++) {
432                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
433                                         function);
434                         err = HvCallXm_connectBusUnit(bus, sub_bus,
435                                         agent_id, 0);
436                         if (err) {
437                                 if (err != 0x302)
438                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
439                                                 bus, sub_bus, agent_id, err);
440                                 continue;
441                         }
442
443                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
444                                         PCI_VENDOR_ID, &vendor_id);
445                         if (err) {
446                                 DBG("ReadVendor(%x, %x, %x) %x\n",
447                                         bus, sub_bus, agent_id, err);
448                                 continue;
449                         }
450                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
451                                         PCI_DEVICE_ID, &device_id);
452                         if (err) {
453                                 DBG("ReadDevice(%x, %x, %x) %x\n",
454                                         bus, sub_bus, agent_id, err);
455                                 continue;
456                         }
457                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
458                                         PCI_CLASS_REVISION , &class_id);
459                         if (err) {
460                                 DBG("ReadClass(%x, %x, %x) %x\n",
461                                         bus, sub_bus, agent_id, err);
462                                 continue;
463                         }
464
465                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
466                                         function);
467                         cp = dt_find_pci_class_name(class_id >> 16);
468                         if (cp && cp->name)
469                                 strncpy(buf, cp->name, sizeof(buf) - 1);
470                         else
471                                 snprintf(buf, sizeof(buf), "pci%x,%x",
472                                                 vendor_id, device_id);
473                         buf[sizeof(buf) - 1] = '\0';
474                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
475                                         "@%x", PCI_SLOT(devfn));
476                         buf[sizeof(buf) - 1] = '\0';
477                         if (function != 0)
478                                 snprintf(buf + strlen(buf),
479                                         sizeof(buf) - strlen(buf),
480                                         ",%x", function);
481                         dt_start_node(dt, buf);
482                         reg[0] = (bus << 16) | (devfn << 8);
483                         reg[1] = 0;
484                         reg[2] = 0;
485                         reg[3] = 0;
486                         reg[4] = 0;
487                         dt_prop_u32_list(dt, "reg", reg, 5);
488                         if (cp && (cp->type || cp->name))
489                                 dt_prop_str(dt, "device_type",
490                                         cp->type ? cp->type : cp->name);
491                         dt_prop_u32(dt, "vendor-id", vendor_id);
492                         dt_prop_u32(dt, "device-id", device_id);
493                         dt_prop_u32(dt, "class-code", class_id >> 8);
494                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
495                         dt_prop_u32(dt, "linux,subbus", sub_bus);
496                         dt_prop_u32(dt, "linux,agent-id", agent_id);
497                         dt_prop_u32(dt, "linux,logical-slot-number",
498                                         bridge_info->logicalSlotNumber);
499                         dt_end_node(dt);
500
501                 }
502         }
503 }
504
505 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
506                 HvSubBusNumber sub_bus, int id_sel)
507 {
508         struct HvCallPci_BridgeInfo bridge_info;
509         HvAgentId agent_id;
510         int function;
511         int ret;
512
513         /* Note: hvSubBus and irq is always be 0 at this level! */
514         for (function = 0; function < 8; ++function) {
515                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
516                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
517                 if (ret != 0) {
518                         if (ret != 0xb)
519                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
520                                                 bus, sub_bus, agent_id, ret);
521                         continue;
522                 }
523                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
524                                 bus, id_sel, function, agent_id);
525                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
526                                 iseries_hv_addr(&bridge_info),
527                                 sizeof(struct HvCallPci_BridgeInfo));
528                 if (ret != 0)
529                         continue;
530                 DBG("bridge info: type %x subbus %x "
531                         "maxAgents %x maxsubbus %x logslot %x\n",
532                         bridge_info.busUnitInfo.deviceType,
533                         bridge_info.subBusNumber,
534                         bridge_info.maxAgents,
535                         bridge_info.maxSubBusNumber,
536                         bridge_info.logicalSlotNumber);
537                 if (bridge_info.busUnitInfo.deviceType ==
538                                 HvCallPci_BridgeDevice)
539                         scan_bridge_slot(dt, bus, &bridge_info);
540                 else
541                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
542                                 bridge_info.busUnitInfo.deviceType);
543         }
544 }
545
546 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
547 {
548         struct HvCallPci_DeviceInfo dev_info;
549         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
550         int err;
551         int id_sel;
552         const int max_agents = 8;
553
554         /*
555          * Probe for EADs Bridges
556          */
557         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
558                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
559                                 iseries_hv_addr(&dev_info),
560                                 sizeof(struct HvCallPci_DeviceInfo));
561                 if (err) {
562                         if (err != 0x302)
563                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
564                                                 bus, sub_bus, id_sel, err);
565                         continue;
566                 }
567                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
568                         DBG("PCI: Invalid System Configuration"
569                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
570                                         dev_info.deviceType, bus, id_sel);
571                         continue;
572                 }
573                 scan_bridge(dt, bus, sub_bus, id_sel);
574         }
575 }
576
577 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
578 {
579         HvBusNumber bus;
580         char buf[32];
581         u32 buses[2];
582         int phb_num = 0;
583
584         /* Check all possible buses. */
585         for (bus = 0; bus < 256; bus++) {
586                 int err = HvCallXm_testBus(bus);
587
588                 if (err) {
589                         /*
590                          * Check for Unexpected Return code, a clue that
591                          * something has gone wrong.
592                          */
593                         if (err != 0x0301)
594                                 DBG("Unexpected Return on Probe(0x%02X) "
595                                                 "0x%04X\n", bus, err);
596                         continue;
597                 }
598                 DBG("bus %d appears to exist\n", bus);
599                 snprintf(buf, 32, "pci@%d", phb_num);
600                 dt_start_node(dt, buf);
601                 dt_prop_str(dt, "device_type", device_type_pci);
602                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
603                 dt_prop_u32(dt, "#address-cells", 3);
604                 dt_prop_u32(dt, "#size-cells", 2);
605                 buses[0] = buses[1] = bus;
606                 dt_prop_u32_list(dt, "bus-range", buses, 2);
607                 scan_phb(dt, bus);
608                 dt_end_node(dt);
609                 phb_num++;
610         }
611 }
612
613 static void dt_finish(struct iseries_flat_dt *dt)
614 {
615         dt_push_u32(dt, OF_DT_END);
616         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
617         klimit = ALIGN((unsigned long)dt_data, 8);
618 }
619
620 void * __init build_flat_dt(unsigned long phys_mem_size)
621 {
622         struct iseries_flat_dt *iseries_dt;
623         u64 tmp[2];
624
625         iseries_dt = dt_init();
626
627         dt_start_node(iseries_dt, "");
628
629         dt_prop_u32(iseries_dt, "#address-cells", 2);
630         dt_prop_u32(iseries_dt, "#size-cells", 2);
631         dt_model(iseries_dt);
632
633         /* /memory */
634         dt_start_node(iseries_dt, "memory@0");
635         dt_prop_str(iseries_dt, "device_type", device_type_memory);
636         tmp[0] = 0;
637         tmp[1] = phys_mem_size;
638         dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
639         dt_end_node(iseries_dt);
640
641         /* /chosen */
642         dt_start_node(iseries_dt, "chosen");
643         dt_prop_str(iseries_dt, "bootargs", cmd_line);
644         dt_end_node(iseries_dt);
645
646         dt_cpus(iseries_dt);
647
648         dt_vdevices(iseries_dt);
649         dt_pci_devices(iseries_dt);
650
651         dt_end_node(iseries_dt);
652
653         dt_finish(iseries_dt);
654
655         return iseries_dt;
656 }