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1da177e4 LT |
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 | ||
8039de10 | 41 | int pdc_type __read_mostly = PDC_TYPE_ILLEGAL; |
1da177e4 LT |
42 | |
43 | void __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; | |
a8f44e38 | 50 | #ifdef CONFIG_64BIT |
1da177e4 LT |
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 | ||
a8f44e38 | 76 | #ifdef CONFIG_64BIT |
1da177e4 LT |
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 */ | |
25985edc | 96 | case 0xA: /* 712 and similar */ |
1da177e4 LT |
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 | ||
112 | static void __init | |
113 | set_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 | ||
8039de10 HD |
123 | if (unlikely( ((start & (PAGE_SIZE - 1)) != 0) |
124 | || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) { | |
1da177e4 LT |
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 | ||
133 | static 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 | ||
a8f44e38 | 155 | #ifdef CONFIG_64BIT |
1da177e4 LT |
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 | ||
170 | static int __init | |
171 | pat_query_module(ulong pcell_loc, ulong mod_index) | |
172 | { | |
0d56d1aa | 173 | pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; |
1da177e4 LT |
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 | ||
0d56d1aa KM |
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 | ||
1da177e4 LT |
183 | /* return cell module (PA or Processor view) */ |
184 | status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index, | |
0d56d1aa | 185 | PA_VIEW, pa_pdc_cell); |
1da177e4 LT |
186 | |
187 | if (status != PDC_OK) { | |
188 | /* no more cell modules or error */ | |
fbd48433 | 189 | kfree(pa_pdc_cell); |
1da177e4 LT |
190 | return status; |
191 | } | |
192 | ||
0d56d1aa KM |
193 | temp = pa_pdc_cell->cba; |
194 | dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path)); | |
1da177e4 | 195 | if (!dev) { |
fbd48433 | 196 | kfree(pa_pdc_cell); |
ba5c4f1b | 197 | return PDC_OK; |
1da177e4 LT |
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... */ | |
0d56d1aa KM |
212 | dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */ |
213 | dev->pmod_loc = pa_pdc_cell->mod_location; | |
dd5e6d6a | 214 | dev->mod0 = pa_pdc_cell->mod[0]; |
1da177e4 LT |
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", | |
0d56d1aa | 226 | pa_pdc_cell->mod[0]); |
1da177e4 LT |
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", | |
0d56d1aa KM |
232 | pa_pdc_cell->mod[0], pa_pdc_cell->mod[1], |
233 | pa_pdc_cell->mod[2]); | |
1da177e4 LT |
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); | |
0d56d1aa KM |
253 | printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]); |
254 | for (i = 0; i < pa_pdc_cell->mod[1]; i++) { | |
1da177e4 LT |
255 | printk(KERN_DEBUG |
256 | " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", | |
0d56d1aa KM |
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) */ | |
1da177e4 LT |
260 | printk(KERN_DEBUG |
261 | " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", | |
0d56d1aa KM |
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) */ | |
1da177e4 LT |
265 | } |
266 | printk(KERN_DEBUG "\n"); | |
267 | break; | |
268 | } | |
269 | #endif /* DEBUG_PAT */ | |
0d56d1aa KM |
270 | |
271 | kfree(pa_pdc_cell); | |
272 | ||
1da177e4 LT |
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 | ||
286 | static 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 | ||
352 | static 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 */ | |
380 | static 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 | ||
a8f44e38 | 421 | #else /* !CONFIG_64BIT */ |
1da177e4 LT |
422 | |
423 | #define pat_inventory() do { } while (0) | |
424 | #define pat_memconfig() do { } while (0) | |
425 | #define sprockets_memconfig() pagezero_memconfig() | |
426 | ||
a8f44e38 | 427 | #endif /* !CONFIG_64BIT */ |
1da177e4 LT |
428 | |
429 | ||
430 | #ifndef CONFIG_PA20 | |
431 | ||
432 | /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */ | |
433 | ||
434 | static struct parisc_device * __init | |
435 | legacy_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 | */ | |
460 | static 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 | */ | |
501 | static void __init | |
502 | add_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", | |
91bae23c | 512 | __FILE__, __func__); |
1da177e4 LT |
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 | */ | |
536 | static 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 | ||
570 | void __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 | ||
597 | void __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 | } |