Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[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 #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_block[] = "block";
76 static char __initdata device_type_byte[] = "byte";
77 static char __initdata device_type_pci[] = "pci";
78 static char __initdata device_type_vdevice[] = "vdevice";
79 static char __initdata device_type_vscsi[] = "vscsi";
80
81
82 /* EBCDIC to ASCII conversion routines */
83
84 static unsigned char __init e2a(unsigned char x)
85 {
86         switch (x) {
87         case 0x81 ... 0x89:
88                 return x - 0x81 + 'a';
89         case 0x91 ... 0x99:
90                 return x - 0x91 + 'j';
91         case 0xA2 ... 0xA9:
92                 return x - 0xA2 + 's';
93         case 0xC1 ... 0xC9:
94                 return x - 0xC1 + 'A';
95         case 0xD1 ... 0xD9:
96                 return x - 0xD1 + 'J';
97         case 0xE2 ... 0xE9:
98                 return x - 0xE2 + 'S';
99         case 0xF0 ... 0xF9:
100                 return x - 0xF0 + '0';
101         }
102         return ' ';
103 }
104
105 static unsigned char * __init strne2a(unsigned char *dest,
106                 const unsigned char *src, size_t n)
107 {
108         int i;
109
110         n = strnlen(src, n);
111
112         for (i = 0; i < n; i++)
113                 dest[i] = e2a(src[i]);
114
115         return dest;
116 }
117
118 static struct iseries_flat_dt * __init dt_init(void)
119 {
120         struct iseries_flat_dt *dt;
121         unsigned long str_len;
122
123         str_len = __dt_strings_end - __dt_strings_start;
124         dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
125         dt->header.off_mem_rsvmap =
126                 offsetof(struct iseries_flat_dt, reserve_map);
127         dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
128         dt->header.off_dt_struct = dt->header.off_dt_strings
129                 + ALIGN(str_len, 8);
130         dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
131         dt->header.dt_strings_size = str_len;
132
133         /* There is no notion of hardware cpu id on iSeries */
134         dt->header.boot_cpuid_phys = smp_processor_id();
135
136         memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
137                         str_len);
138
139         dt->header.magic = OF_DT_HEADER;
140         dt->header.version = 0x10;
141         dt->header.last_comp_version = 0x10;
142
143         dt->reserve_map[0] = 0;
144         dt->reserve_map[1] = 0;
145
146         return dt;
147 }
148
149 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
150 {
151         *((u32 *)dt_data) = value;
152         dt_data += sizeof(u32);
153 }
154
155 #ifdef notyet
156 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
157 {
158         *((u64 *)dt_data) = value;
159         dt_data += sizeof(u64);
160 }
161 #endif
162
163 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
164                 int len)
165 {
166         memcpy(dt_data, data, len);
167         dt_data += ALIGN(len, 4);
168 }
169
170 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
171 {
172         dt_push_u32(dt, OF_DT_BEGIN_NODE);
173         dt_push_bytes(dt, name, strlen(name) + 1);
174 }
175
176 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
177
178 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
179                 const void *data, int len)
180 {
181         unsigned long offset;
182
183         dt_push_u32(dt, OF_DT_PROP);
184
185         /* Length of the data */
186         dt_push_u32(dt, len);
187
188         offset = name - __dt_strings_start;
189
190         /* The offset of the properties name in the string blob. */
191         dt_push_u32(dt, (u32)offset);
192
193         /* The actual data. */
194         dt_push_bytes(dt, data, len);
195 }
196
197 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
198                 const char *data)
199 {
200         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
201 }
202
203 static 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
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
215 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
216                 const char *name, u64 *data, int n)
217 {
218         dt_prop(dt, name, data, sizeof(u64) * n);
219 }
220
221 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
222                 const char *name, u32 *data, int n)
223 {
224         dt_prop(dt, name, data, sizeof(u32) * n);
225 }
226
227 #ifdef notyet
228 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
229 {
230         dt_prop(dt, name, NULL, 0);
231 }
232 #endif
233
234 static void __init dt_cpus(struct iseries_flat_dt *dt)
235 {
236         unsigned char buf[32];
237         unsigned char *p;
238         unsigned int i, index;
239         struct IoHriProcessorVpd *d;
240         u32 pft_size[2];
241
242         /* yuck */
243         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
244         p = strchr(buf, ' ');
245         if (!p) p = buf + strlen(buf);
246
247         dt_start_node(dt, "cpus");
248         dt_prop_u32(dt, "#address-cells", 1);
249         dt_prop_u32(dt, "#size-cells", 0);
250
251         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
252         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
253
254         for (i = 0; i < NR_CPUS; i++) {
255                 if (lppaca[i].dyn_proc_status >= 2)
256                         continue;
257
258                 snprintf(p, 32 - (p - buf), "@%d", i);
259                 dt_start_node(dt, buf);
260
261                 dt_prop_str(dt, "device_type", device_type_cpu);
262
263                 index = lppaca[i].dyn_hv_phys_proc_index;
264                 d = &xIoHriProcessorVpd[index];
265
266                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
267                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
268
269                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
270                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
271
272                 /* magic conversions to Hz copied from old code */
273                 dt_prop_u32(dt, "clock-frequency",
274                         ((1UL << 34) * 1000000) / d->xProcFreq);
275                 dt_prop_u32(dt, "timebase-frequency",
276                         ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
277
278                 dt_prop_u32(dt, "reg", i);
279
280                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
281
282                 dt_end_node(dt);
283         }
284
285         dt_end_node(dt);
286 }
287
288 static void __init dt_model(struct iseries_flat_dt *dt)
289 {
290         char buf[16] = "IBM,";
291
292         /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
293         /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
294         strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
295         strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
296         buf[11] = '\0';
297         dt_prop_str(dt, "system-id", buf);
298
299         /* "IBM," + machineType[0:4] */
300         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
301         buf[8] = '\0';
302         dt_prop_str(dt, "model", buf);
303
304         dt_prop_str(dt, "compatible", "IBM,iSeries");
305         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
306 }
307
308 static void __init dt_initrd(struct iseries_flat_dt *dt)
309 {
310 #ifdef CONFIG_BLK_DEV_INITRD
311         if (naca.xRamDisk) {
312                 dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
313                 dt_prop_u64(dt, "linux,initrd-end",
314                         (u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
315         }
316 #endif
317 }
318
319 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
320                 const char *name, u32 reg, int unit,
321                 const char *type, const char *compat, int end)
322 {
323         char buf[32];
324
325         snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
326         dt_start_node(dt, buf);
327         dt_prop_str(dt, "device_type", type);
328         if (compat)
329                 dt_prop_str(dt, "compatible", compat);
330         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
331         if (unit >= 0)
332                 dt_prop_u32(dt, "linux,unit_address", unit);
333         if (end)
334                 dt_end_node(dt);
335 }
336
337 static void __init dt_vdevices(struct iseries_flat_dt *dt)
338 {
339         u32 reg = 0;
340         HvLpIndexMap vlan_map;
341         int i;
342
343         dt_start_node(dt, "vdevice");
344         dt_prop_str(dt, "device_type", device_type_vdevice);
345         dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
346         dt_prop_u32(dt, "#address-cells", 1);
347         dt_prop_u32(dt, "#size-cells", 0);
348
349         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
350                         "IBM,iSeries-vty", 1);
351         reg++;
352
353         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
354                         "IBM,v-scsi", 1);
355         reg++;
356
357         vlan_map = HvLpConfig_getVirtualLanIndexMap();
358         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
359                 unsigned char mac_addr[ETH_ALEN];
360
361                 if ((vlan_map & (0x8000 >> i)) == 0)
362                         continue;
363                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
364                                 "IBM,iSeries-l-lan", 0);
365                 mac_addr[0] = 0x02;
366                 mac_addr[1] = 0x01;
367                 mac_addr[2] = 0xff;
368                 mac_addr[3] = i;
369                 mac_addr[4] = 0xff;
370                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
371                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
372                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
373                 dt_prop_u32(dt, "max-frame-size", 9000);
374                 dt_prop_u32(dt, "address-bits", 48);
375
376                 dt_end_node(dt);
377         }
378         reg += HVMAXARCHITECTEDVIRTUALLANS;
379
380         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
381                 dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
382                                 "IBM,iSeries-viodasd", 1);
383         reg += HVMAXARCHITECTEDVIRTUALDISKS;
384
385         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
386                 dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
387                                 "IBM,iSeries-viocd", 1);
388         reg += HVMAXARCHITECTEDVIRTUALCDROMS;
389
390         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
391                 dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
392                                 "IBM,iSeries-viotape", 1);
393
394         dt_end_node(dt);
395 }
396
397 struct pci_class_name {
398         u16 code;
399         const char *name;
400         const char *type;
401 };
402
403 static struct pci_class_name __initdata pci_class_name[] = {
404         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
405 };
406
407 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
408 {
409         struct pci_class_name *cp;
410
411         for (cp = pci_class_name;
412                         cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
413                 if (cp->code == class_code)
414                         return cp;
415         return NULL;
416 }
417
418 /*
419  * This assumes that the node slot is always on the primary bus!
420  */
421 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
422                 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
423 {
424         HvSubBusNumber sub_bus = bridge_info->subBusNumber;
425         u16 vendor_id;
426         u16 device_id;
427         u32 class_id;
428         int err;
429         char buf[32];
430         u32 reg[5];
431         int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
432         int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
433         HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
434         u8 devfn;
435         struct pci_class_name *cp;
436
437         /*
438          * Connect all functions of any device found.
439          */
440         for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
441                 for (function = 0; function < 8; function++) {
442                         HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
443                                         function);
444                         err = HvCallXm_connectBusUnit(bus, sub_bus,
445                                         agent_id, 0);
446                         if (err) {
447                                 if (err != 0x302)
448                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
449                                                 bus, sub_bus, agent_id, err);
450                                 continue;
451                         }
452
453                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
454                                         PCI_VENDOR_ID, &vendor_id);
455                         if (err) {
456                                 DBG("ReadVendor(%x, %x, %x) %x\n",
457                                         bus, sub_bus, agent_id, err);
458                                 continue;
459                         }
460                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
461                                         PCI_DEVICE_ID, &device_id);
462                         if (err) {
463                                 DBG("ReadDevice(%x, %x, %x) %x\n",
464                                         bus, sub_bus, agent_id, err);
465                                 continue;
466                         }
467                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
468                                         PCI_CLASS_REVISION , &class_id);
469                         if (err) {
470                                 DBG("ReadClass(%x, %x, %x) %x\n",
471                                         bus, sub_bus, agent_id, err);
472                                 continue;
473                         }
474
475                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
476                                         function);
477                         cp = dt_find_pci_class_name(class_id >> 16);
478                         if (cp && cp->name)
479                                 strncpy(buf, cp->name, sizeof(buf) - 1);
480                         else
481                                 snprintf(buf, sizeof(buf), "pci%x,%x",
482                                                 vendor_id, device_id);
483                         buf[sizeof(buf) - 1] = '\0';
484                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
485                                         "@%x", PCI_SLOT(devfn));
486                         buf[sizeof(buf) - 1] = '\0';
487                         if (function != 0)
488                                 snprintf(buf + strlen(buf),
489                                         sizeof(buf) - strlen(buf),
490                                         ",%x", function);
491                         dt_start_node(dt, buf);
492                         reg[0] = (bus << 16) | (devfn << 8);
493                         reg[1] = 0;
494                         reg[2] = 0;
495                         reg[3] = 0;
496                         reg[4] = 0;
497                         dt_prop_u32_list(dt, "reg", reg, 5);
498                         if (cp && (cp->type || cp->name))
499                                 dt_prop_str(dt, "device_type",
500                                         cp->type ? cp->type : cp->name);
501                         dt_prop_u32(dt, "vendor-id", vendor_id);
502                         dt_prop_u32(dt, "device-id", device_id);
503                         dt_prop_u32(dt, "class-code", class_id >> 8);
504                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
505                         dt_prop_u32(dt, "linux,subbus", sub_bus);
506                         dt_prop_u32(dt, "linux,agent-id", agent_id);
507                         dt_prop_u32(dt, "linux,logical-slot-number",
508                                         bridge_info->logicalSlotNumber);
509                         dt_end_node(dt);
510
511                 }
512         }
513 }
514
515 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
516                 HvSubBusNumber sub_bus, int id_sel)
517 {
518         struct HvCallPci_BridgeInfo bridge_info;
519         HvAgentId agent_id;
520         int function;
521         int ret;
522
523         /* Note: hvSubBus and irq is always be 0 at this level! */
524         for (function = 0; function < 8; ++function) {
525                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
526                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
527                 if (ret != 0) {
528                         if (ret != 0xb)
529                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
530                                                 bus, sub_bus, agent_id, ret);
531                         continue;
532                 }
533                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
534                                 bus, id_sel, function, agent_id);
535                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
536                                 iseries_hv_addr(&bridge_info),
537                                 sizeof(struct HvCallPci_BridgeInfo));
538                 if (ret != 0)
539                         continue;
540                 DBG("bridge info: type %x subbus %x "
541                         "maxAgents %x maxsubbus %x logslot %x\n",
542                         bridge_info.busUnitInfo.deviceType,
543                         bridge_info.subBusNumber,
544                         bridge_info.maxAgents,
545                         bridge_info.maxSubBusNumber,
546                         bridge_info.logicalSlotNumber);
547                 if (bridge_info.busUnitInfo.deviceType ==
548                                 HvCallPci_BridgeDevice)
549                         scan_bridge_slot(dt, bus, &bridge_info);
550                 else
551                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
552                                 bridge_info.busUnitInfo.deviceType);
553         }
554 }
555
556 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
557 {
558         struct HvCallPci_DeviceInfo dev_info;
559         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
560         int err;
561         int id_sel;
562         const int max_agents = 8;
563
564         /*
565          * Probe for EADs Bridges
566          */
567         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
568                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
569                                 iseries_hv_addr(&dev_info),
570                                 sizeof(struct HvCallPci_DeviceInfo));
571                 if (err) {
572                         if (err != 0x302)
573                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
574                                                 bus, sub_bus, id_sel, err);
575                         continue;
576                 }
577                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
578                         DBG("PCI: Invalid System Configuration"
579                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
580                                         dev_info.deviceType, bus, id_sel);
581                         continue;
582                 }
583                 scan_bridge(dt, bus, sub_bus, id_sel);
584         }
585 }
586
587 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
588 {
589         HvBusNumber bus;
590         char buf[32];
591         u32 buses[2];
592         int phb_num = 0;
593
594         /* Check all possible buses. */
595         for (bus = 0; bus < 256; bus++) {
596                 int err = HvCallXm_testBus(bus);
597
598                 if (err) {
599                         /*
600                          * Check for Unexpected Return code, a clue that
601                          * something has gone wrong.
602                          */
603                         if (err != 0x0301)
604                                 DBG("Unexpected Return on Probe(0x%02X) "
605                                                 "0x%04X\n", bus, err);
606                         continue;
607                 }
608                 DBG("bus %d appears to exist\n", bus);
609                 snprintf(buf, 32, "pci@%d", phb_num);
610                 dt_start_node(dt, buf);
611                 dt_prop_str(dt, "device_type", device_type_pci);
612                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
613                 dt_prop_u32(dt, "#address-cells", 3);
614                 dt_prop_u32(dt, "#size-cells", 2);
615                 buses[0] = buses[1] = bus;
616                 dt_prop_u32_list(dt, "bus-range", buses, 2);
617                 scan_phb(dt, bus);
618                 dt_end_node(dt);
619                 phb_num++;
620         }
621 }
622
623 static void dt_finish(struct iseries_flat_dt *dt)
624 {
625         dt_push_u32(dt, OF_DT_END);
626         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
627         klimit = ALIGN((unsigned long)dt_data, 8);
628 }
629
630 void * __init build_flat_dt(unsigned long phys_mem_size)
631 {
632         struct iseries_flat_dt *iseries_dt;
633         u64 tmp[2];
634
635         iseries_dt = dt_init();
636
637         dt_start_node(iseries_dt, "");
638
639         dt_prop_u32(iseries_dt, "#address-cells", 2);
640         dt_prop_u32(iseries_dt, "#size-cells", 2);
641         dt_model(iseries_dt);
642
643         /* /memory */
644         dt_start_node(iseries_dt, "memory@0");
645         dt_prop_str(iseries_dt, "device_type", device_type_memory);
646         tmp[0] = 0;
647         tmp[1] = phys_mem_size;
648         dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
649         dt_end_node(iseries_dt);
650
651         /* /chosen */
652         dt_start_node(iseries_dt, "chosen");
653         dt_prop_str(iseries_dt, "bootargs", cmd_line);
654         dt_initrd(iseries_dt);
655         dt_end_node(iseries_dt);
656
657         dt_cpus(iseries_dt);
658
659         dt_vdevices(iseries_dt);
660         dt_pci_devices(iseries_dt);
661
662         dt_end_node(iseries_dt);
663
664         dt_finish(iseries_dt);
665
666         return iseries_dt;
667 }