Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / parisc / kernel / inventory.c
blobb0fe19ac4d78f03cd524d9b9f2d23ec828dc9100
1 /*
2 * inventory.c
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.
9 * Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries)
10 * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
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...
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>
36 ** Debug options
37 ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
39 #undef DEBUG_PAT
41 int pdc_type __read_mostly = PDC_TYPE_ILLEGAL;
43 /* cell number and location (PAT firmware only) */
44 unsigned long parisc_cell_num __read_mostly;
45 unsigned long parisc_cell_loc __read_mostly;
48 void __init setup_pdc(void)
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
59 /* Determine the pdc "type" used on this machine */
61 printk(KERN_INFO "Determining PDC firmware type: ");
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;
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.
77 * TODO: We should test for 64 bit capability and give a
78 * clearer message.
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;
92 #endif
94 /* Check the CPU's bus ID. There's probably a better test. */
96 status = pdc_model_info(&model);
98 bus_id = (model.hversion >> (4 + 7)) & 0x1f;
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 */
108 pdc_type = PDC_TYPE_SNAKE;
109 pr_cont("Snake.\n");
110 return;
112 default: /* Everything else */
114 pr_cont("Unsupported.\n");
115 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
119 #define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
121 static void __init
122 set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
123 unsigned long pages4k)
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).
132 if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
133 || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
135 panic("Memory range doesn't align with page size!\n");
138 pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
139 pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
142 static void __init pagezero_memconfig(void)
144 unsigned long npages;
146 /* Use the 32 bit information from page zero to create a single
147 * entry in the pmem_ranges[] table.
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.
155 * If that support is done in the future, this is where it
156 * should be done.
159 npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
160 set_pmem_entry(pmem_ranges,0UL,npages);
161 npmem_ranges = 1;
164 #ifdef CONFIG_64BIT
166 /* All of the PDC PAT specific code is 64-bit only */
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.
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.
179 static int __init
180 pat_query_module(ulong pcell_loc, ulong mod_index)
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;
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!");
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);
196 if (status != PDC_OK) {
197 /* no more cell modules or error */
198 kfree(pa_pdc_cell);
199 return status;
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;
209 /* alloc_pa_dev sets dev->hpa */
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.)
216 dev->pcell_loc = pcell_loc;
217 dev->mod_index = mod_index;
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];
225 register_parisc_device(dev); /* advertise device */
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;
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;
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;
248 case PAT_ENTITY_PBC:
249 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
250 goto print_ranges;
252 case PAT_ENTITY_SBA:
253 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
254 goto print_ranges;
256 case PAT_ENTITY_LBA:
257 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
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) */
275 printk(KERN_DEBUG "\n");
276 break;
278 #endif /* DEBUG_PAT */
280 kfree(pa_pdc_cell);
282 return PDC_OK;
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.
293 #define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
295 static void __init pat_memconfig(void)
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;
306 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
308 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
310 if ((status != PDC_OK)
311 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
313 /* The above pdc call shouldn't fail, but, just in
314 * case, just use the PAGE0 info.
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;
324 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
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");
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.
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) ) ) {
347 continue;
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;
356 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
357 npmem_ranges++;
361 static int __init pat_inventory(void)
363 int status;
364 ulong mod_index = 0;
365 struct pdc_pat_cell_num cell_info;
368 ** Note: Prelude (and it's successors: Lclass, A400/500) only
369 ** implement PDC_PAT_CELL sub-options 0 and 2.
371 status = pdc_pat_cell_get_number(&cell_info);
372 if (status != PDC_OK) {
373 return 0;
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
381 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
382 mod_index++;
385 return mod_index;
388 /* We only look for extended memory ranges on a 64 bit capable box */
389 static void __init sprockets_memconfig(void)
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;
399 status = pdc_mem_mem_table(&r_addr,mem_table,
400 (unsigned long)MAX_PHYSMEM_RANGES);
402 if (status != PDC_OK) {
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.
410 pagezero_memconfig();
411 return;
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");
419 entries = (int)r_addr.entries_returned;
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++;
430 #else /* !CONFIG_64BIT */
432 #define pat_inventory() do { } while (0)
433 #define pat_memconfig() do { } while (0)
434 #define sprockets_memconfig() pagezero_memconfig()
436 #endif /* !CONFIG_64BIT */
439 #ifndef CONFIG_PA20
441 /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
443 static struct parisc_device * __init
444 legacy_create_device(struct pdc_memory_map *r_addr,
445 struct pdc_module_path *module_path)
447 struct parisc_device *dev;
448 int status = pdc_mem_map_hpa(r_addr, module_path);
449 if (status != PDC_OK)
450 return NULL;
452 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
453 if (dev == NULL)
454 return NULL;
456 register_parisc_device(dev);
457 return dev;
461 * snake_inventory
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.
469 static void __init snake_inventory(void)
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;
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;
484 memset(module_path.path.bc, 0xff, 4);
485 module_path.path.bc[4] = mod;
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);
495 #else /* CONFIG_PA20 */
496 #define snake_inventory() do { } while (0)
497 #endif /* CONFIG_PA20 */
499 /* Common 32/64 bit based code goes here */
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.
507 * This function adds any additional addresses reported by the system_map
508 * firmware to the parisc device.
510 static void __init
511 add_system_map_addresses(struct parisc_device *dev, int num_addrs,
512 int module_instance)
514 int i;
515 long status;
516 struct pdc_system_map_addr_info addr_result;
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;
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);
540 * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
542 * This function attempts to retrieve and register all the devices firmware
543 * knows about via the SYSTEM_MAP PDC call.
545 static void __init system_map_inventory(void)
547 int i;
548 long status = PDC_OK;
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;
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;
562 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
563 if (!dev)
564 continue;
566 register_parisc_device(dev);
568 /* if available, get the additional addresses for a module */
569 if (!module_result.add_addrs)
570 continue;
572 add_system_map_addresses(dev, module_result.add_addrs, i);
575 walk_central_bus();
576 return;
579 void __init do_memory_inventory(void)
581 switch (pdc_type) {
583 case PDC_TYPE_PAT:
584 pat_memconfig();
585 break;
587 case PDC_TYPE_SYSTEM_MAP:
588 sprockets_memconfig();
589 break;
591 case PDC_TYPE_SNAKE:
592 pagezero_memconfig();
593 return;
595 default:
596 panic("Unknown PDC type!\n");
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();
606 void __init do_device_inventory(void)
608 printk(KERN_INFO "Searching for devices...\n");
610 init_parisc_bus();
612 switch (pdc_type) {
614 case PDC_TYPE_PAT:
615 pat_inventory();
616 break;
618 case PDC_TYPE_SYSTEM_MAP:
619 system_map_inventory();
620 break;
622 case PDC_TYPE_SNAKE:
623 snake_inventory();
624 break;
626 default:
627 panic("Unknown PDC type!\n");
629 printk(KERN_INFO "Found devices:\n");
630 print_parisc_devices();