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21#include <linux/types.h>
22#include <linux/kernel.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/mm.h>
26#include <asm/hardware.h>
27#include <asm/io.h>
28#include <asm/mmzone.h>
29#include <asm/pdc.h>
30#include <asm/pdcpat.h>
31#include <asm/processor.h>
32#include <asm/page.h>
33#include <asm/parisc-device.h>
34
35
36
37
38
39#undef DEBUG_PAT
40
41int pdc_type __read_mostly = PDC_TYPE_ILLEGAL;
42
43void __init setup_pdc(void)
44{
45 long status;
46 unsigned int bus_id;
47 struct pdc_system_map_mod_info module_result;
48 struct pdc_module_path module_path;
49 struct pdc_model model;
50#ifdef CONFIG_64BIT
51 struct pdc_pat_cell_num cell_info;
52#endif
53
54
55
56 printk(KERN_INFO "Determining PDC firmware type: ");
57
58 status = pdc_system_map_find_mods(&module_result, &module_path, 0);
59 if (status == PDC_OK) {
60 pdc_type = PDC_TYPE_SYSTEM_MAP;
61 printk("System Map.\n");
62 return;
63 }
64
65
66
67
68
69
70
71
72
73
74
75
76#ifdef CONFIG_64BIT
77 status = pdc_pat_cell_get_number(&cell_info);
78 if (status == PDC_OK) {
79 pdc_type = PDC_TYPE_PAT;
80 printk("64 bit PAT.\n");
81 return;
82 }
83#endif
84
85
86
87 status = pdc_model_info(&model);
88
89 bus_id = (model.hversion >> (4 + 7)) & 0x1f;
90
91 switch (bus_id) {
92 case 0x4:
93 case 0x6:
94 case 0x7:
95 case 0x8:
96 case 0xA:
97 case 0xC:
98
99 pdc_type = PDC_TYPE_SNAKE;
100 printk("Snake.\n");
101 return;
102
103 default:
104
105 printk("Unsupported.\n");
106 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
107 }
108}
109
110#define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12)
111
112static void __init
113set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
114 unsigned long pages4k)
115{
116
117
118
119
120
121
122
123 if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
124 || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
125
126 panic("Memory range doesn't align with page size!\n");
127 }
128
129 pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
130 pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
131}
132
133static void __init pagezero_memconfig(void)
134{
135 unsigned long npages;
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150 npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
151 set_pmem_entry(pmem_ranges,0UL,npages);
152 npmem_ranges = 1;
153}
154
155#ifdef CONFIG_64BIT
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170static int __init
171pat_query_module(ulong pcell_loc, ulong mod_index)
172{
173 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
174 unsigned long bytecnt;
175 unsigned long temp;
176 long status;
177 struct parisc_device *dev;
178
179 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
180 if (!pa_pdc_cell)
181 panic("couldn't allocate memory for PDC_PAT_CELL!");
182
183
184 status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
185 PA_VIEW, pa_pdc_cell);
186
187 if (status != PDC_OK) {
188
189 return status;
190 }
191
192 temp = pa_pdc_cell->cba;
193 dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
194 if (!dev) {
195 return PDC_OK;
196 }
197
198
199
200
201
202
203
204
205 dev->pcell_loc = pcell_loc;
206 dev->mod_index = mod_index;
207
208
209
210 dev->mod_info = pa_pdc_cell->mod_info;
211 dev->pmod_loc = pa_pdc_cell->mod_location;
212
213 register_parisc_device(dev);
214
215#ifdef DEBUG_PAT
216 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
217
218 switch (PAT_GET_ENTITY(dev->mod_info)) {
219 unsigned long i;
220
221 case PAT_ENTITY_PROC:
222 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
223 pa_pdc_cell->mod[0]);
224 break;
225
226 case PAT_ENTITY_MEM:
227 printk(KERN_DEBUG
228 "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
229 pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
230 pa_pdc_cell->mod[2]);
231 break;
232 case PAT_ENTITY_CA:
233 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
234 break;
235
236 case PAT_ENTITY_PBC:
237 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
238 goto print_ranges;
239
240 case PAT_ENTITY_SBA:
241 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
242 goto print_ranges;
243
244 case PAT_ENTITY_LBA:
245 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
246
247 print_ranges:
248 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
249 IO_VIEW, &io_pdc_cell);
250 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
251 for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
252 printk(KERN_DEBUG
253 " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
254 i, pa_pdc_cell->mod[2 + i * 3],
255 pa_pdc_cell->mod[3 + i * 3],
256 pa_pdc_cell->mod[4 + i * 3]);
257 printk(KERN_DEBUG
258 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
259 i, io_pdc_cell->mod[2 + i * 3],
260 io_pdc_cell->mod[3 + i * 3],
261 io_pdc_cell->mod[4 + i * 3]);
262 }
263 printk(KERN_DEBUG "\n");
264 break;
265 }
266#endif
267
268 kfree(pa_pdc_cell);
269
270 return PDC_OK;
271}
272
273
274
275
276
277
278
279
280
281#define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
282
283static void __init pat_memconfig(void)
284{
285 unsigned long actual_len;
286 struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
287 struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
288 physmem_range_t *pmem_ptr;
289 long status;
290 int entries;
291 unsigned long length;
292 int i;
293
294 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
295
296 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
297
298 if ((status != PDC_OK)
299 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
300
301
302
303
304
305 printk("\n\n\n");
306 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
307 "All memory may not be used!\n\n\n");
308 pagezero_memconfig();
309 return;
310 }
311
312 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
313
314 if (entries > PAT_MAX_RANGES) {
315 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
316 printk(KERN_WARNING "Some memory may not be used!\n");
317 }
318
319
320
321
322
323
324 npmem_ranges = 0;
325 mtbl_ptr = mem_table;
326 pmem_ptr = pmem_ranges;
327 for (i = 0; i < entries; i++,mtbl_ptr++) {
328 if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
329 || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
330 || (mtbl_ptr->pages == 0)
331 || ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
332 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
333 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
334
335 continue;
336 }
337
338 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
339 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
340 printk(KERN_WARNING "Some memory will not be used!\n");
341 break;
342 }
343
344 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
345 npmem_ranges++;
346 }
347}
348
349static int __init pat_inventory(void)
350{
351 int status;
352 ulong mod_index = 0;
353 struct pdc_pat_cell_num cell_info;
354
355
356
357
358
359 status = pdc_pat_cell_get_number(&cell_info);
360 if (status != PDC_OK) {
361 return 0;
362 }
363
364#ifdef DEBUG_PAT
365 printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
366 cell_info.cell_loc);
367#endif
368
369 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
370 mod_index++;
371 }
372
373 return mod_index;
374}
375
376
377static void __init sprockets_memconfig(void)
378{
379 struct pdc_memory_table_raddr r_addr;
380 struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
381 struct pdc_memory_table *mtbl_ptr;
382 physmem_range_t *pmem_ptr;
383 long status;
384 int entries;
385 int i;
386
387 status = pdc_mem_mem_table(&r_addr,mem_table,
388 (unsigned long)MAX_PHYSMEM_RANGES);
389
390 if (status != PDC_OK) {
391
392
393
394
395
396
397
398 pagezero_memconfig();
399 return;
400 }
401
402 if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
403 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
404 printk(KERN_WARNING "Some memory will not be used!\n");
405 }
406
407 entries = (int)r_addr.entries_returned;
408
409 npmem_ranges = 0;
410 mtbl_ptr = mem_table;
411 pmem_ptr = pmem_ranges;
412 for (i = 0; i < entries; i++,mtbl_ptr++) {
413 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
414 npmem_ranges++;
415 }
416}
417
418#else
419
420#define pat_inventory() do { } while (0)
421#define pat_memconfig() do { } while (0)
422#define sprockets_memconfig() pagezero_memconfig()
423
424#endif
425
426
427#ifndef CONFIG_PA20
428
429
430
431static struct parisc_device * __init
432legacy_create_device(struct pdc_memory_map *r_addr,
433 struct pdc_module_path *module_path)
434{
435 struct parisc_device *dev;
436 int status = pdc_mem_map_hpa(r_addr, module_path);
437 if (status != PDC_OK)
438 return NULL;
439
440 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
441 if (dev == NULL)
442 return NULL;
443
444 register_parisc_device(dev);
445 return dev;
446}
447
448
449
450
451
452
453
454
455
456
457static void __init snake_inventory(void)
458{
459 int mod;
460 for (mod = 0; mod < 16; mod++) {
461 struct parisc_device *dev;
462 struct pdc_module_path module_path;
463 struct pdc_memory_map r_addr;
464 unsigned int func;
465
466 memset(module_path.path.bc, 0xff, 6);
467 module_path.path.mod = mod;
468 dev = legacy_create_device(&r_addr, &module_path);
469 if ((!dev) || (dev->id.hw_type != HPHW_BA))
470 continue;
471
472 memset(module_path.path.bc, 0xff, 4);
473 module_path.path.bc[4] = mod;
474
475 for (func = 0; func < 16; func++) {
476 module_path.path.bc[5] = 0;
477 module_path.path.mod = func;
478 legacy_create_device(&r_addr, &module_path);
479 }
480 }
481}
482
483#else
484#define snake_inventory() do { } while (0)
485#endif
486
487
488
489
490
491
492
493
494
495
496
497
498static void __init
499add_system_map_addresses(struct parisc_device *dev, int num_addrs,
500 int module_instance)
501{
502 int i;
503 long status;
504 struct pdc_system_map_addr_info addr_result;
505
506 dev->addr = kmalloc(num_addrs * sizeof(unsigned long), GFP_KERNEL);
507 if(!dev->addr) {
508 printk(KERN_ERR "%s %s(): memory allocation failure\n",
509 __FILE__, __func__);
510 return;
511 }
512
513 for(i = 1; i <= num_addrs; ++i) {
514 status = pdc_system_map_find_addrs(&addr_result,
515 module_instance, i);
516 if(PDC_OK == status) {
517 dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
518 dev->num_addrs++;
519 } else {
520 printk(KERN_WARNING
521 "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
522 status, i);
523 }
524 }
525}
526
527
528
529
530
531
532
533static void __init system_map_inventory(void)
534{
535 int i;
536 long status = PDC_OK;
537
538 for (i = 0; i < 256; i++) {
539 struct parisc_device *dev;
540 struct pdc_system_map_mod_info module_result;
541 struct pdc_module_path module_path;
542
543 status = pdc_system_map_find_mods(&module_result,
544 &module_path, i);
545 if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
546 break;
547 if (status != PDC_OK)
548 continue;
549
550 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
551 if (!dev)
552 continue;
553
554 register_parisc_device(dev);
555
556
557 if (!module_result.add_addrs)
558 continue;
559
560 add_system_map_addresses(dev, module_result.add_addrs, i);
561 }
562
563 walk_central_bus();
564 return;
565}
566
567void __init do_memory_inventory(void)
568{
569 switch (pdc_type) {
570
571 case PDC_TYPE_PAT:
572 pat_memconfig();
573 break;
574
575 case PDC_TYPE_SYSTEM_MAP:
576 sprockets_memconfig();
577 break;
578
579 case PDC_TYPE_SNAKE:
580 pagezero_memconfig();
581 return;
582
583 default:
584 panic("Unknown PDC type!\n");
585 }
586
587 if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
588 printk(KERN_WARNING "Bad memory configuration returned!\n");
589 printk(KERN_WARNING "Some memory may not be used!\n");
590 pagezero_memconfig();
591 }
592}
593
594void __init do_device_inventory(void)
595{
596 printk(KERN_INFO "Searching for devices...\n");
597
598 init_parisc_bus();
599
600 switch (pdc_type) {
601
602 case PDC_TYPE_PAT:
603 pat_inventory();
604 break;
605
606 case PDC_TYPE_SYSTEM_MAP:
607 system_map_inventory();
608 break;
609
610 case PDC_TYPE_SNAKE:
611 snake_inventory();
612 break;
613
614 default:
615 panic("Unknown PDC type!\n");
616 }
617 printk(KERN_INFO "Found devices:\n");
618 print_parisc_devices();
619}
620