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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * inventory.c
4 *
5 * Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries)
6 * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
7 *
8 * These are the routines to discover what hardware exists in this box.
9 * This task is complicated by there being 3 different ways of
10 * performing an inventory, depending largely on the age of the box.
11 * The recommended way to do this is to check to see whether the machine
12 * is a `Snake' first, then try System Map, then try PAT. We try System
13 * Map before checking for a Snake -- this probably doesn't cause any
14 * problems, but...
15 */
16
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/mm.h>
22#include <linux/platform_device.h>
23#include <asm/hardware.h>
24#include <asm/io.h>
25#include <asm/mmzone.h>
26#include <asm/pdc.h>
27#include <asm/pdcpat.h>
28#include <asm/processor.h>
29#include <asm/page.h>
30#include <asm/parisc-device.h>
31#include <asm/tlbflush.h>
32
33/*
34** Debug options
35** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
36*/
37#undef DEBUG_PAT
38
39int pdc_type __ro_after_init = PDC_TYPE_ILLEGAL;
40
41/* cell number and location (PAT firmware only) */
42unsigned long parisc_cell_num __ro_after_init;
43unsigned long parisc_cell_loc __ro_after_init;
44unsigned long parisc_pat_pdc_cap __ro_after_init;
45
46
47void __init setup_pdc(void)
48{
49 long status;
50 unsigned int bus_id;
51 struct pdc_system_map_mod_info module_result;
52 struct pdc_module_path module_path;
53 struct pdc_model model;
54#ifdef CONFIG_64BIT
55 struct pdc_pat_cell_num cell_info;
56#endif
57
58 /* Determine the pdc "type" used on this machine */
59
60 printk(KERN_INFO "Determining PDC firmware type: ");
61
62 status = pdc_system_map_find_mods(&module_result, &module_path, 0);
63 if (status == PDC_OK) {
64 pdc_type = PDC_TYPE_SYSTEM_MAP;
65 pr_cont("System Map.\n");
66 return;
67 }
68
69 /*
70 * If the machine doesn't support PDC_SYSTEM_MAP then either it
71 * is a pdc pat box, or it is an older box. All 64 bit capable
72 * machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.
73 */
74
75 /*
76 * TODO: We should test for 64 bit capability and give a
77 * clearer message.
78 */
79
80#ifdef CONFIG_64BIT
81 status = pdc_pat_cell_get_number(&cell_info);
82 if (status == PDC_OK) {
83 unsigned long legacy_rev, pat_rev;
84 pdc_type = PDC_TYPE_PAT;
85 pr_cont("64 bit PAT.\n");
86 parisc_cell_num = cell_info.cell_num;
87 parisc_cell_loc = cell_info.cell_loc;
88 pr_info("PAT: Running on cell %lu and location %lu.\n",
89 parisc_cell_num, parisc_cell_loc);
90 status = pdc_pat_pd_get_pdc_revisions(&legacy_rev,
91 &pat_rev, &parisc_pat_pdc_cap);
92 pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",
93 legacy_rev, pat_rev, parisc_pat_pdc_cap,
94 parisc_pat_pdc_cap
95 & PDC_PAT_CAPABILITY_BIT_SIMULTANEOUS_PTLB ? 1:0,
96 parisc_pat_pdc_cap
97 & PDC_PAT_CAPABILITY_BIT_PDC_HPMC_RENDEZ ? 1:0);
98 return;
99 }
100#endif
101
102 /* Check the CPU's bus ID. There's probably a better test. */
103
104 status = pdc_model_info(&model);
105
106 bus_id = (model.hversion >> (4 + 7)) & 0x1f;
107
108 switch (bus_id) {
109 case 0x4: /* 720, 730, 750, 735, 755 */
110 case 0x6: /* 705, 710 */
111 case 0x7: /* 715, 725 */
112 case 0x8: /* 745, 747, 742 */
113 case 0xA: /* 712 and similar */
114 case 0xC: /* 715/64, at least */
115
116 pdc_type = PDC_TYPE_SNAKE;
117 pr_cont("Snake.\n");
118 return;
119
120 default: /* Everything else */
121
122 pr_cont("Unsupported.\n");
123 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
124 }
125}
126
127#define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
128
129static void __init
130set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
131 unsigned long pages4k)
132{
133 /* Rather than aligning and potentially throwing away
134 * memory, we'll assume that any ranges are already
135 * nicely aligned with any reasonable page size, and
136 * panic if they are not (it's more likely that the
137 * pdc info is bad in this case).
138 */
139
140 if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
141 || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
142
143 panic("Memory range doesn't align with page size!\n");
144 }
145
146 pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
147 pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
148}
149
150static void __init pagezero_memconfig(void)
151{
152 unsigned long npages;
153
154 /* Use the 32 bit information from page zero to create a single
155 * entry in the pmem_ranges[] table.
156 *
157 * We currently don't support machines with contiguous memory
158 * >= 4 Gb, who report that memory using 64 bit only fields
159 * on page zero. It's not worth doing until it can be tested,
160 * and it is not clear we can support those machines for other
161 * reasons.
162 *
163 * If that support is done in the future, this is where it
164 * should be done.
165 */
166
167 npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
168 set_pmem_entry(pmem_ranges,0UL,npages);
169 npmem_ranges = 1;
170}
171
172#ifdef CONFIG_64BIT
173
174/* All of the PDC PAT specific code is 64-bit only */
175
176/*
177** The module object is filled via PDC_PAT_CELL[Return Cell Module].
178** If a module is found, register module will get the IODC bytes via
179** pdc_iodc_read() using the PA view of conf_base_addr for the hpa parameter.
180**
181** The IO view can be used by PDC_PAT_CELL[Return Cell Module]
182** only for SBAs and LBAs. This view will cause an invalid
183** argument error for all other cell module types.
184**
185*/
186
187static int __init
188pat_query_module(ulong pcell_loc, ulong mod_index)
189{
190 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
191 unsigned long bytecnt;
192 unsigned long temp; /* 64-bit scratch value */
193 long status; /* PDC return value status */
194 struct parisc_device *dev;
195
196 pa_pdc_cell = kmalloc_obj(*pa_pdc_cell);
197 if (!pa_pdc_cell)
198 panic("couldn't allocate memory for PDC_PAT_CELL!");
199
200 /* return cell module (PA or Processor view) */
201 status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
202 PA_VIEW, pa_pdc_cell);
203
204 if (status != PDC_OK) {
205 /* no more cell modules or error */
206 kfree(pa_pdc_cell);
207 return status;
208 }
209
210#ifdef DEBUG_PAT
211 pr_debug("PAT INDEX: %lu: cba 0x%lx, "
212 "mod_info 0x%lx, mod_location 0x%lx, "
213 "mod: 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx "
214 "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
215 mod_index + 1, pa_pdc_cell->cba,
216 pa_pdc_cell->mod_info, pa_pdc_cell->mod_location,
217 pa_pdc_cell->mod[0], pa_pdc_cell->mod[1], pa_pdc_cell->mod[2],
218 pa_pdc_cell->mod[3], pa_pdc_cell->mod[4], pa_pdc_cell->mod[5],
219 pa_pdc_cell->mod[6], pa_pdc_cell->mod[7], pa_pdc_cell->mod[8],
220 pa_pdc_cell->mod[9], pa_pdc_cell->mod[10], pa_pdc_cell->mod[11]);
221#endif
222
223 temp = pa_pdc_cell->cba;
224 dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
225 if (!dev) {
226 kfree(pa_pdc_cell);
227 return PDC_OK;
228 }
229
230 /* alloc_pa_dev sets dev->hpa */
231
232 /*
233 ** save parameters in the parisc_device
234 ** (The idea being the device driver will call pdc_pat_cell_module()
235 ** and store the results in its own data structure.)
236 */
237 dev->pcell_loc = pcell_loc;
238 dev->mod_index = mod_index;
239
240 /* save generic info returned from the call */
241 /* REVISIT: who is the consumer of this? not sure yet... */
242 dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */
243 dev->pmod_loc = pa_pdc_cell->mod_location;
244 dev->mod0 = pa_pdc_cell->mod[0];
245
246 register_parisc_device(dev); /* advertise device */
247
248#ifdef DEBUG_PAT
249 /* dump what we see so far... */
250 switch (PAT_GET_ENTITY(dev->mod_info)) {
251 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
252 unsigned long i;
253
254 case PAT_ENTITY_PROC:
255 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
256 pa_pdc_cell->mod[0]);
257 break;
258
259 case PAT_ENTITY_MEM:
260 printk(KERN_DEBUG
261 "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
262 pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
263 pa_pdc_cell->mod[2]);
264 break;
265 case PAT_ENTITY_CA:
266 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
267 break;
268
269 case PAT_ENTITY_PBC:
270 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
271 goto print_ranges;
272
273 case PAT_ENTITY_SBA:
274 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
275 goto print_ranges;
276
277 case PAT_ENTITY_LBA:
278 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
279
280 print_ranges:
281 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
282 IO_VIEW, &io_pdc_cell);
283 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
284 for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
285 printk(KERN_DEBUG
286 " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
287 i, pa_pdc_cell->mod[2 + i * 3], /* type */
288 pa_pdc_cell->mod[3 + i * 3], /* start */
289 pa_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
290 printk(KERN_DEBUG
291 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
292 i, io_pdc_cell.mod[2 + i * 3], /* type */
293 io_pdc_cell.mod[3 + i * 3], /* start */
294 io_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
295 }
296 printk(KERN_DEBUG "\n");
297 break;
298 }
299#endif /* DEBUG_PAT */
300
301 kfree(pa_pdc_cell);
302
303 return PDC_OK;
304}
305
306
307/* pat pdc can return information about a variety of different
308 * types of memory (e.g. firmware,i/o, etc) but we only care about
309 * the usable physical ram right now. Since the firmware specific
310 * information is allocated on the stack, we'll be generous, in
311 * case there is a lot of other information we don't care about.
312 */
313
314#define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
315
316static void __init pat_memconfig(void)
317{
318 unsigned long actual_len;
319 struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
320 struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
321 physmem_range_t *pmem_ptr;
322 long status;
323 int entries;
324 unsigned long length;
325 int i;
326
327 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
328
329 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
330
331 if ((status != PDC_OK)
332 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
333
334 /* The above pdc call shouldn't fail, but, just in
335 * case, just use the PAGE0 info.
336 */
337
338 printk("\n\n\n");
339 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
340 "All memory may not be used!\n\n\n");
341 pagezero_memconfig();
342 return;
343 }
344
345 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
346
347 if (entries > PAT_MAX_RANGES) {
348 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
349 printk(KERN_WARNING "Some memory may not be used!\n");
350 }
351
352 /* Copy information into the firmware independent pmem_ranges
353 * array, skipping types we don't care about. Notice we said
354 * "may" above. We'll use all the entries that were returned.
355 */
356
357 npmem_ranges = 0;
358 mtbl_ptr = mem_table;
359 pmem_ptr = pmem_ranges; /* Global firmware independent table */
360 for (i = 0; i < entries; i++,mtbl_ptr++) {
361 if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
362 || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
363 || (mtbl_ptr->pages == 0)
364 || ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
365 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
366 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
367
368 continue;
369 }
370
371 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
372 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
373 printk(KERN_WARNING "Some memory will not be used!\n");
374 break;
375 }
376
377 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
378 npmem_ranges++;
379 }
380}
381
382static int __init pat_inventory(void)
383{
384 int status;
385 ulong mod_index = 0;
386 struct pdc_pat_cell_num cell_info;
387
388 /*
389 ** Note: Prelude (and it's successors: Lclass, A400/500) only
390 ** implement PDC_PAT_CELL sub-options 0 and 2.
391 */
392 status = pdc_pat_cell_get_number(&cell_info);
393 if (status != PDC_OK) {
394 return 0;
395 }
396
397#ifdef DEBUG_PAT
398 printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
399 cell_info.cell_loc);
400#endif
401
402 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
403 mod_index++;
404 }
405
406 return mod_index;
407}
408
409/* We only look for extended memory ranges on a 64 bit capable box */
410static void __init sprockets_memconfig(void)
411{
412 struct pdc_memory_table_raddr r_addr;
413 struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
414 struct pdc_memory_table *mtbl_ptr;
415 physmem_range_t *pmem_ptr;
416 long status;
417 int entries;
418 int i;
419
420 status = pdc_mem_mem_table(&r_addr,mem_table,
421 (unsigned long)MAX_PHYSMEM_RANGES);
422
423 if (status != PDC_OK) {
424
425 /* The above pdc call only works on boxes with sprockets
426 * firmware (newer B,C,J class). Other non PAT PDC machines
427 * do support more than 3.75 Gb of memory, but we don't
428 * support them yet.
429 */
430
431 pagezero_memconfig();
432 return;
433 }
434
435 if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
436 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
437 printk(KERN_WARNING "Some memory will not be used!\n");
438 }
439
440 entries = (int)r_addr.entries_returned;
441
442 npmem_ranges = 0;
443 mtbl_ptr = mem_table;
444 pmem_ptr = pmem_ranges; /* Global firmware independent table */
445 for (i = 0; i < entries; i++,mtbl_ptr++) {
446 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
447 npmem_ranges++;
448 }
449}
450
451#else /* !CONFIG_64BIT */
452
453#define pat_inventory() do { } while (0)
454#define pat_memconfig() do { } while (0)
455#define sprockets_memconfig() pagezero_memconfig()
456
457#endif /* !CONFIG_64BIT */
458
459
460#ifndef CONFIG_PA20
461
462/* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
463
464static struct parisc_device * __init
465legacy_create_device(struct pdc_memory_map *r_addr,
466 struct pdc_module_path *module_path)
467{
468 struct parisc_device *dev;
469 int status = pdc_mem_map_hpa(r_addr, module_path);
470 if (status != PDC_OK)
471 return NULL;
472
473 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
474 if (dev == NULL)
475 return NULL;
476
477 register_parisc_device(dev);
478 return dev;
479}
480
481/**
482 * snake_inventory
483 *
484 * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
485 * To use it, we initialise the mod_path.bc to 0xff and try all values of
486 * mod to get the HPA for the top-level devices. Bus adapters may have
487 * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
488 * module, then trying all possible functions.
489 */
490static void __init snake_inventory(void)
491{
492 int mod;
493 for (mod = 0; mod < 16; mod++) {
494 struct parisc_device *dev;
495 struct pdc_module_path module_path;
496 struct pdc_memory_map r_addr;
497 unsigned int func;
498
499 memset(module_path.path.bc, 0xff, 6);
500 module_path.path.mod = mod;
501 dev = legacy_create_device(&r_addr, &module_path);
502 if ((!dev) || (dev->id.hw_type != HPHW_BA))
503 continue;
504
505 memset(module_path.path.bc, 0xff, 4);
506 module_path.path.bc[4] = mod;
507
508 for (func = 0; func < 16; func++) {
509 module_path.path.bc[5] = 0;
510 module_path.path.mod = func;
511 legacy_create_device(&r_addr, &module_path);
512 }
513 }
514}
515
516#else /* CONFIG_PA20 */
517#define snake_inventory() do { } while (0)
518#endif /* CONFIG_PA20 */
519
520/* Common 32/64 bit based code goes here */
521
522/**
523 * add_system_map_addresses - Add additional addresses to the parisc device.
524 * @dev: The parisc device.
525 * @num_addrs: Then number of addresses to add;
526 * @module_instance: The system_map module instance.
527 *
528 * This function adds any additional addresses reported by the system_map
529 * firmware to the parisc device.
530 */
531static void __init
532add_system_map_addresses(struct parisc_device *dev, int num_addrs,
533 int module_instance)
534{
535 int i;
536 long status;
537 struct pdc_system_map_addr_info addr_result;
538
539 dev->addr = kmalloc_objs(*dev->addr, num_addrs);
540 if(!dev->addr) {
541 printk(KERN_ERR "%s %s(): memory allocation failure\n",
542 __FILE__, __func__);
543 return;
544 }
545
546 for(i = 1; i <= num_addrs; ++i) {
547 status = pdc_system_map_find_addrs(&addr_result,
548 module_instance, i);
549 if(PDC_OK == status) {
550 dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
551 dev->num_addrs++;
552 } else {
553 printk(KERN_WARNING
554 "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
555 status, i);
556 }
557 }
558}
559
560/**
561 * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
562 *
563 * This function attempts to retrieve and register all the devices firmware
564 * knows about via the SYSTEM_MAP PDC call.
565 */
566static void __init system_map_inventory(void)
567{
568 int i;
569 long status = PDC_OK;
570
571 for (i = 0; i < 256; i++) {
572 struct parisc_device *dev;
573 struct pdc_system_map_mod_info module_result;
574 struct pdc_module_path module_path;
575
576 status = pdc_system_map_find_mods(&module_result,
577 &module_path, i);
578 if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
579 break;
580 if (status != PDC_OK)
581 continue;
582
583 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
584 if (!dev)
585 continue;
586
587 register_parisc_device(dev);
588
589 /* if available, get the additional addresses for a module */
590 if (!module_result.add_addrs)
591 continue;
592
593 add_system_map_addresses(dev, module_result.add_addrs, i);
594 }
595
596 walk_central_bus();
597 return;
598}
599
600void __init do_memory_inventory(void)
601{
602 switch (pdc_type) {
603
604 case PDC_TYPE_PAT:
605 pat_memconfig();
606 break;
607
608 case PDC_TYPE_SYSTEM_MAP:
609 sprockets_memconfig();
610 break;
611
612 case PDC_TYPE_SNAKE:
613 pagezero_memconfig();
614 return;
615
616 default:
617 panic("Unknown PDC type!\n");
618 }
619
620 if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
621 printk(KERN_WARNING "Bad memory configuration returned!\n");
622 printk(KERN_WARNING "Some memory may not be used!\n");
623 pagezero_memconfig();
624 }
625}
626
627void __init do_device_inventory(void)
628{
629 printk(KERN_INFO "Searching for devices...\n");
630
631 init_parisc_bus();
632
633 switch (pdc_type) {
634
635 case PDC_TYPE_PAT:
636 pat_inventory();
637 break;
638
639 case PDC_TYPE_SYSTEM_MAP:
640 system_map_inventory();
641 break;
642
643 case PDC_TYPE_SNAKE:
644 snake_inventory();
645 break;
646
647 default:
648 panic("Unknown PDC type!\n");
649 }
650 printk(KERN_INFO "Found devices:\n");
651 print_parisc_devices();
652
653#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
654 pa_serialize_tlb_flushes = machine_has_merced_bus();
655 if (pa_serialize_tlb_flushes)
656 pr_info("Merced bus found: Enable PxTLB serialization.\n");
657#endif
658
659#if defined(CONFIG_FW_CFG_SYSFS)
660 if (running_on_qemu) {
661 struct resource res[3] = {0,};
662 unsigned int base;
663
664 base = ((unsigned long long) PAGE0->pad0[2] << 32)
665 | PAGE0->pad0[3]; /* SeaBIOS stored it here */
666
667 res[0].name = "fw_cfg";
668 res[0].start = base;
669 res[0].end = base + 8 - 1;
670 res[0].flags = IORESOURCE_MEM;
671
672 res[1].name = "ctrl";
673 res[1].start = 0;
674 res[1].flags = IORESOURCE_REG;
675
676 res[2].name = "data";
677 res[2].start = 4;
678 res[2].flags = IORESOURCE_REG;
679
680 if (base) {
681 pr_info("Found qemu fw_cfg interface at %#08x\n", base);
682 platform_device_register_simple("fw_cfg",
683 PLATFORM_DEVID_NONE, res, 3);
684 }
685 }
686#endif
687}