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 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 /* alloc_pa_dev sets dev->hpa */
199
200 /*
201 ** save parameters in the parisc_device
202 ** (The idea being the device driver will call pdc_pat_cell_module()
203 ** and store the results in its own data structure.)
204 */
205 dev->pcell_loc = pcell_loc;
206 dev->mod_index = mod_index;
207
208 /* save generic info returned from the call */
209 /* REVISIT: who is the consumer of this? not sure yet... */
210 dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */
211 dev->pmod_loc = pa_pdc_cell->mod_location;
212
213 register_parisc_device(dev); /* advertise device */
214
215#ifdef DEBUG_PAT
216 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
217 /* dump what we see so far... */
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], /* type */
255 pa_pdc_cell->mod[3 + i * 3], /* start */
256 pa_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
257 printk(KERN_DEBUG
258 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
259 i, io_pdc_cell->mod[2 + i * 3], /* type */
260 io_pdc_cell->mod[3 + i * 3], /* start */
261 io_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
262 }
263 printk(KERN_DEBUG "\n");
264 break;
265 }
266#endif /* DEBUG_PAT */
267
268 kfree(pa_pdc_cell);
269
270 return PDC_OK;
271}
272
273
274/* pat pdc can return information about a variety of different
275 * types of memory (e.g. firmware,i/o, etc) but we only care about
276 * the usable physical ram right now. Since the firmware specific
277 * information is allocated on the stack, we'll be generous, in
278 * case there is a lot of other information we don't care about.
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 /* The above pdc call shouldn't fail, but, just in
302 * case, just use the PAGE0 info.
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 /* Copy information into the firmware independent pmem_ranges
320 * array, skipping types we don't care about. Notice we said
321 * "may" above. We'll use all the entries that were returned.
322 */
323
324 npmem_ranges = 0;
325 mtbl_ptr = mem_table;
326 pmem_ptr = pmem_ranges; /* Global firmware independent table */
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 ** Note: Prelude (and it's successors: Lclass, A400/500) only
357 ** implement PDC_PAT_CELL sub-options 0 and 2.
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/* We only look for extended memory ranges on a 64 bit capable box */
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 /* The above pdc call only works on boxes with sprockets
393 * firmware (newer B,C,J class). Other non PAT PDC machines
394 * do support more than 3.75 Gb of memory, but we don't
395 * support them yet.
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; /* Global firmware independent table */
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 /* !CONFIG_64BIT */
419
420#define pat_inventory() do { } while (0)
421#define pat_memconfig() do { } while (0)
422#define sprockets_memconfig() pagezero_memconfig()
423
424#endif /* !CONFIG_64BIT */
425
426
427#ifndef CONFIG_PA20
428
429/* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
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 * snake_inventory
450 *
451 * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
452 * To use it, we initialise the mod_path.bc to 0xff and try all values of
453 * mod to get the HPA for the top-level devices. Bus adapters may have
454 * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
455 * module, then trying all possible functions.
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 /* CONFIG_PA20 */
484#define snake_inventory() do { } while (0)
485#endif /* CONFIG_PA20 */
486
487/* Common 32/64 bit based code goes here */
488
489/**
490 * add_system_map_addresses - Add additional addresses to the parisc device.
491 * @dev: The parisc device.
492 * @num_addrs: Then number of addresses to add;
493 * @module_instance: The system_map module instance.
494 *
495 * This function adds any additional addresses reported by the system_map
496 * firmware to the parisc device.
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 * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
529 *
530 * This function attempts to retrieve and register all the devices firmware
531 * knows about via the SYSTEM_MAP PDC call.
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 /* if available, get the additional addresses for a module */
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}
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(sizeof (*pa_pdc_cell), GFP_KERNEL);
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 temp = pa_pdc_cell->cba;
211 dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
212 if (!dev) {
213 kfree(pa_pdc_cell);
214 return PDC_OK;
215 }
216
217 /* alloc_pa_dev sets dev->hpa */
218
219 /*
220 ** save parameters in the parisc_device
221 ** (The idea being the device driver will call pdc_pat_cell_module()
222 ** and store the results in its own data structure.)
223 */
224 dev->pcell_loc = pcell_loc;
225 dev->mod_index = mod_index;
226
227 /* save generic info returned from the call */
228 /* REVISIT: who is the consumer of this? not sure yet... */
229 dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */
230 dev->pmod_loc = pa_pdc_cell->mod_location;
231 dev->mod0 = pa_pdc_cell->mod[0];
232
233 register_parisc_device(dev); /* advertise device */
234
235#ifdef DEBUG_PAT
236 /* dump what we see so far... */
237 switch (PAT_GET_ENTITY(dev->mod_info)) {
238 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
239 unsigned long i;
240
241 case PAT_ENTITY_PROC:
242 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
243 pa_pdc_cell->mod[0]);
244 break;
245
246 case PAT_ENTITY_MEM:
247 printk(KERN_DEBUG
248 "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
249 pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
250 pa_pdc_cell->mod[2]);
251 break;
252 case PAT_ENTITY_CA:
253 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
254 break;
255
256 case PAT_ENTITY_PBC:
257 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
258 goto print_ranges;
259
260 case PAT_ENTITY_SBA:
261 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
262 goto print_ranges;
263
264 case PAT_ENTITY_LBA:
265 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
266
267 print_ranges:
268 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
269 IO_VIEW, &io_pdc_cell);
270 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
271 for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
272 printk(KERN_DEBUG
273 " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
274 i, pa_pdc_cell->mod[2 + i * 3], /* type */
275 pa_pdc_cell->mod[3 + i * 3], /* start */
276 pa_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
277 printk(KERN_DEBUG
278 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
279 i, io_pdc_cell.mod[2 + i * 3], /* type */
280 io_pdc_cell.mod[3 + i * 3], /* start */
281 io_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
282 }
283 printk(KERN_DEBUG "\n");
284 break;
285 }
286#endif /* DEBUG_PAT */
287
288 kfree(pa_pdc_cell);
289
290 return PDC_OK;
291}
292
293
294/* pat pdc can return information about a variety of different
295 * types of memory (e.g. firmware,i/o, etc) but we only care about
296 * the usable physical ram right now. Since the firmware specific
297 * information is allocated on the stack, we'll be generous, in
298 * case there is a lot of other information we don't care about.
299 */
300
301#define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
302
303static void __init pat_memconfig(void)
304{
305 unsigned long actual_len;
306 struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
307 struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
308 physmem_range_t *pmem_ptr;
309 long status;
310 int entries;
311 unsigned long length;
312 int i;
313
314 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
315
316 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
317
318 if ((status != PDC_OK)
319 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
320
321 /* The above pdc call shouldn't fail, but, just in
322 * case, just use the PAGE0 info.
323 */
324
325 printk("\n\n\n");
326 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
327 "All memory may not be used!\n\n\n");
328 pagezero_memconfig();
329 return;
330 }
331
332 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
333
334 if (entries > PAT_MAX_RANGES) {
335 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
336 printk(KERN_WARNING "Some memory may not be used!\n");
337 }
338
339 /* Copy information into the firmware independent pmem_ranges
340 * array, skipping types we don't care about. Notice we said
341 * "may" above. We'll use all the entries that were returned.
342 */
343
344 npmem_ranges = 0;
345 mtbl_ptr = mem_table;
346 pmem_ptr = pmem_ranges; /* Global firmware independent table */
347 for (i = 0; i < entries; i++,mtbl_ptr++) {
348 if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
349 || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
350 || (mtbl_ptr->pages == 0)
351 || ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
352 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
353 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
354
355 continue;
356 }
357
358 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
359 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
360 printk(KERN_WARNING "Some memory will not be used!\n");
361 break;
362 }
363
364 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
365 npmem_ranges++;
366 }
367}
368
369static int __init pat_inventory(void)
370{
371 int status;
372 ulong mod_index = 0;
373 struct pdc_pat_cell_num cell_info;
374
375 /*
376 ** Note: Prelude (and it's successors: Lclass, A400/500) only
377 ** implement PDC_PAT_CELL sub-options 0 and 2.
378 */
379 status = pdc_pat_cell_get_number(&cell_info);
380 if (status != PDC_OK) {
381 return 0;
382 }
383
384#ifdef DEBUG_PAT
385 printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
386 cell_info.cell_loc);
387#endif
388
389 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
390 mod_index++;
391 }
392
393 return mod_index;
394}
395
396/* We only look for extended memory ranges on a 64 bit capable box */
397static void __init sprockets_memconfig(void)
398{
399 struct pdc_memory_table_raddr r_addr;
400 struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
401 struct pdc_memory_table *mtbl_ptr;
402 physmem_range_t *pmem_ptr;
403 long status;
404 int entries;
405 int i;
406
407 status = pdc_mem_mem_table(&r_addr,mem_table,
408 (unsigned long)MAX_PHYSMEM_RANGES);
409
410 if (status != PDC_OK) {
411
412 /* The above pdc call only works on boxes with sprockets
413 * firmware (newer B,C,J class). Other non PAT PDC machines
414 * do support more than 3.75 Gb of memory, but we don't
415 * support them yet.
416 */
417
418 pagezero_memconfig();
419 return;
420 }
421
422 if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
423 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
424 printk(KERN_WARNING "Some memory will not be used!\n");
425 }
426
427 entries = (int)r_addr.entries_returned;
428
429 npmem_ranges = 0;
430 mtbl_ptr = mem_table;
431 pmem_ptr = pmem_ranges; /* Global firmware independent table */
432 for (i = 0; i < entries; i++,mtbl_ptr++) {
433 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
434 npmem_ranges++;
435 }
436}
437
438#else /* !CONFIG_64BIT */
439
440#define pat_inventory() do { } while (0)
441#define pat_memconfig() do { } while (0)
442#define sprockets_memconfig() pagezero_memconfig()
443
444#endif /* !CONFIG_64BIT */
445
446
447#ifndef CONFIG_PA20
448
449/* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
450
451static struct parisc_device * __init
452legacy_create_device(struct pdc_memory_map *r_addr,
453 struct pdc_module_path *module_path)
454{
455 struct parisc_device *dev;
456 int status = pdc_mem_map_hpa(r_addr, module_path);
457 if (status != PDC_OK)
458 return NULL;
459
460 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
461 if (dev == NULL)
462 return NULL;
463
464 register_parisc_device(dev);
465 return dev;
466}
467
468/**
469 * snake_inventory
470 *
471 * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
472 * To use it, we initialise the mod_path.bc to 0xff and try all values of
473 * mod to get the HPA for the top-level devices. Bus adapters may have
474 * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
475 * module, then trying all possible functions.
476 */
477static void __init snake_inventory(void)
478{
479 int mod;
480 for (mod = 0; mod < 16; mod++) {
481 struct parisc_device *dev;
482 struct pdc_module_path module_path;
483 struct pdc_memory_map r_addr;
484 unsigned int func;
485
486 memset(module_path.path.bc, 0xff, 6);
487 module_path.path.mod = mod;
488 dev = legacy_create_device(&r_addr, &module_path);
489 if ((!dev) || (dev->id.hw_type != HPHW_BA))
490 continue;
491
492 memset(module_path.path.bc, 0xff, 4);
493 module_path.path.bc[4] = mod;
494
495 for (func = 0; func < 16; func++) {
496 module_path.path.bc[5] = 0;
497 module_path.path.mod = func;
498 legacy_create_device(&r_addr, &module_path);
499 }
500 }
501}
502
503#else /* CONFIG_PA20 */
504#define snake_inventory() do { } while (0)
505#endif /* CONFIG_PA20 */
506
507/* Common 32/64 bit based code goes here */
508
509/**
510 * add_system_map_addresses - Add additional addresses to the parisc device.
511 * @dev: The parisc device.
512 * @num_addrs: Then number of addresses to add;
513 * @module_instance: The system_map module instance.
514 *
515 * This function adds any additional addresses reported by the system_map
516 * firmware to the parisc device.
517 */
518static void __init
519add_system_map_addresses(struct parisc_device *dev, int num_addrs,
520 int module_instance)
521{
522 int i;
523 long status;
524 struct pdc_system_map_addr_info addr_result;
525
526 dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL);
527 if(!dev->addr) {
528 printk(KERN_ERR "%s %s(): memory allocation failure\n",
529 __FILE__, __func__);
530 return;
531 }
532
533 for(i = 1; i <= num_addrs; ++i) {
534 status = pdc_system_map_find_addrs(&addr_result,
535 module_instance, i);
536 if(PDC_OK == status) {
537 dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
538 dev->num_addrs++;
539 } else {
540 printk(KERN_WARNING
541 "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
542 status, i);
543 }
544 }
545}
546
547/**
548 * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
549 *
550 * This function attempts to retrieve and register all the devices firmware
551 * knows about via the SYSTEM_MAP PDC call.
552 */
553static void __init system_map_inventory(void)
554{
555 int i;
556 long status = PDC_OK;
557
558 for (i = 0; i < 256; i++) {
559 struct parisc_device *dev;
560 struct pdc_system_map_mod_info module_result;
561 struct pdc_module_path module_path;
562
563 status = pdc_system_map_find_mods(&module_result,
564 &module_path, i);
565 if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
566 break;
567 if (status != PDC_OK)
568 continue;
569
570 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
571 if (!dev)
572 continue;
573
574 register_parisc_device(dev);
575
576 /* if available, get the additional addresses for a module */
577 if (!module_result.add_addrs)
578 continue;
579
580 add_system_map_addresses(dev, module_result.add_addrs, i);
581 }
582
583 walk_central_bus();
584 return;
585}
586
587void __init do_memory_inventory(void)
588{
589 switch (pdc_type) {
590
591 case PDC_TYPE_PAT:
592 pat_memconfig();
593 break;
594
595 case PDC_TYPE_SYSTEM_MAP:
596 sprockets_memconfig();
597 break;
598
599 case PDC_TYPE_SNAKE:
600 pagezero_memconfig();
601 return;
602
603 default:
604 panic("Unknown PDC type!\n");
605 }
606
607 if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
608 printk(KERN_WARNING "Bad memory configuration returned!\n");
609 printk(KERN_WARNING "Some memory may not be used!\n");
610 pagezero_memconfig();
611 }
612}
613
614void __init do_device_inventory(void)
615{
616 printk(KERN_INFO "Searching for devices...\n");
617
618 init_parisc_bus();
619
620 switch (pdc_type) {
621
622 case PDC_TYPE_PAT:
623 pat_inventory();
624 break;
625
626 case PDC_TYPE_SYSTEM_MAP:
627 system_map_inventory();
628 break;
629
630 case PDC_TYPE_SNAKE:
631 snake_inventory();
632 break;
633
634 default:
635 panic("Unknown PDC type!\n");
636 }
637 printk(KERN_INFO "Found devices:\n");
638 print_parisc_devices();
639
640#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
641 pa_serialize_tlb_flushes = machine_has_merced_bus();
642 if (pa_serialize_tlb_flushes)
643 pr_info("Merced bus found: Enable PxTLB serialization.\n");
644#endif
645
646#if defined(CONFIG_FW_CFG_SYSFS)
647 if (running_on_qemu) {
648 struct resource res[3] = {0,};
649 unsigned int base;
650
651 base = ((unsigned long long) PAGE0->pad0[2] << 32)
652 | PAGE0->pad0[3]; /* SeaBIOS stored it here */
653
654 res[0].name = "fw_cfg";
655 res[0].start = base;
656 res[0].end = base + 8 - 1;
657 res[0].flags = IORESOURCE_MEM;
658
659 res[1].name = "ctrl";
660 res[1].start = 0;
661 res[1].flags = IORESOURCE_REG;
662
663 res[2].name = "data";
664 res[2].start = 4;
665 res[2].flags = IORESOURCE_REG;
666
667 if (base) {
668 pr_info("Found qemu fw_cfg interface at %#08x\n", base);
669 platform_device_register_simple("fw_cfg",
670 PLATFORM_DEVID_NONE, res, 3);
671 }
672 }
673#endif
674}