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