~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/iseries/dt.c

Version: ~ [ linux-5.4.2 ] ~ [ linux-5.3.15 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.88 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.158 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.206 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.206 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.78 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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  */
 56 extern char __dt_strings_start[];
 57 extern char __dt_strings_end[];
 58 
 59 #define DS(s)   ({      \
 60         static const char __s[] __attribute__((section(".dt_strings"))) = s; \
 61         __s;            \
 62 })
 63 
 64 struct iseries_flat_dt {
 65         struct boot_param_header header;
 66         u64 reserve_map[2];
 67 };
 68 
 69 static 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  */
 75 static char __initdata device_type_cpu[] = "cpu";
 76 static char __initdata device_type_memory[] = "memory";
 77 static char __initdata device_type_serial[] = "serial";
 78 static char __initdata device_type_network[] = "network";
 79 static char __initdata device_type_pci[] = "pci";
 80 static char __initdata device_type_vdevice[] = "vdevice";
 81 static char __initdata device_type_vscsi[] = "vscsi";
 82 
 83 
 84 /* EBCDIC to ASCII conversion routines */
 85 
 86 static 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 + '';
103         }
104         return ' ';
105 }
106 
107 static 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 
120 static 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 
151 static 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
158 static 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 
165 static 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 
172 static 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 
180 static 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 
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 #define dt_prop_u32(dt, name, data)     __dt_prop_u32((dt), DS(name), (data))
209 
210 static 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 
225 static 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_CPUS; 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 
279 static 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 
299 static 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 
310 static 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 
328 static 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 
373 struct pci_class_name {
374         u16 code;
375         const char *name;
376         const char *type;
377 };
378 
379 static struct pci_class_name __initdata pci_class_name[] = {
380         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
381 };
382 
383 static 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  */
397 static 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 
491 static 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 
532 static 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 
563 static 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 
599 static 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 
606 void * __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 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp