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