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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * inventory.c | |
4 | * | |
1da177e4 LT |
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> | |
b37d1c18 | 30 | #include <asm/tlbflush.h> |
1da177e4 LT |
31 | |
32 | /* | |
33 | ** Debug options | |
34 | ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices. | |
35 | */ | |
36 | #undef DEBUG_PAT | |
37 | ||
7c1952b4 | 38 | int pdc_type __ro_after_init = PDC_TYPE_ILLEGAL; |
1da177e4 | 39 | |
c9c2877d | 40 | /* cell number and location (PAT firmware only) */ |
7c1952b4 HD |
41 | unsigned long parisc_cell_num __ro_after_init; |
42 | unsigned long parisc_cell_loc __ro_after_init; | |
43 | unsigned long parisc_pat_pdc_cap __ro_after_init; | |
c9c2877d HD |
44 | |
45 | ||
1da177e4 LT |
46 | void __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; | |
a8f44e38 | 53 | #ifdef CONFIG_64BIT |
1da177e4 LT |
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; | |
4345a64a | 64 | pr_cont("System Map.\n"); |
1da177e4 LT |
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 | ||
a8f44e38 | 79 | #ifdef CONFIG_64BIT |
1da177e4 LT |
80 | status = pdc_pat_cell_get_number(&cell_info); |
81 | if (status == PDC_OK) { | |
e543b3a6 | 82 | unsigned long legacy_rev, pat_rev; |
1da177e4 | 83 | pdc_type = PDC_TYPE_PAT; |
4345a64a | 84 | pr_cont("64 bit PAT.\n"); |
c9c2877d HD |
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); | |
e543b3a6 HD |
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); | |
1da177e4 LT |
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 */ | |
25985edc | 112 | case 0xA: /* 712 and similar */ |
1da177e4 LT |
113 | case 0xC: /* 715/64, at least */ |
114 | ||
115 | pdc_type = PDC_TYPE_SNAKE; | |
4345a64a | 116 | pr_cont("Snake.\n"); |
1da177e4 LT |
117 | return; |
118 | ||
119 | default: /* Everything else */ | |
120 | ||
4345a64a | 121 | pr_cont("Unsupported.\n"); |
1da177e4 LT |
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 | ||
128 | static void __init | |
129 | set_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 | ||
8039de10 HD |
139 | if (unlikely( ((start & (PAGE_SIZE - 1)) != 0) |
140 | || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) { | |
1da177e4 LT |
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 | ||
149 | static 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 | ||
a8f44e38 | 171 | #ifdef CONFIG_64BIT |
1da177e4 LT |
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 | ||
186 | static int __init | |
187 | pat_query_module(ulong pcell_loc, ulong mod_index) | |
188 | { | |
0d56d1aa | 189 | pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; |
1da177e4 LT |
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 | ||
0d56d1aa KM |
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 | ||
1da177e4 LT |
199 | /* return cell module (PA or Processor view) */ |
200 | status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index, | |
0d56d1aa | 201 | PA_VIEW, pa_pdc_cell); |
1da177e4 LT |
202 | |
203 | if (status != PDC_OK) { | |
204 | /* no more cell modules or error */ | |
fbd48433 | 205 | kfree(pa_pdc_cell); |
1da177e4 LT |
206 | return status; |
207 | } | |
208 | ||
0d56d1aa KM |
209 | temp = pa_pdc_cell->cba; |
210 | dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path)); | |
1da177e4 | 211 | if (!dev) { |
fbd48433 | 212 | kfree(pa_pdc_cell); |
ba5c4f1b | 213 | return PDC_OK; |
1da177e4 LT |
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... */ | |
0d56d1aa KM |
228 | dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */ |
229 | dev->pmod_loc = pa_pdc_cell->mod_location; | |
dd5e6d6a | 230 | dev->mod0 = pa_pdc_cell->mod[0]; |
1da177e4 LT |
231 | |
232 | register_parisc_device(dev); /* advertise device */ | |
233 | ||
234 | #ifdef DEBUG_PAT | |
1da177e4 LT |
235 | /* dump what we see so far... */ |
236 | switch (PAT_GET_ENTITY(dev->mod_info)) { | |
637250cc | 237 | pdc_pat_cell_mod_maddr_block_t io_pdc_cell; |
1da177e4 LT |
238 | unsigned long i; |
239 | ||
240 | case PAT_ENTITY_PROC: | |
241 | printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n", | |
0d56d1aa | 242 | pa_pdc_cell->mod[0]); |
1da177e4 LT |
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", | |
0d56d1aa KM |
248 | pa_pdc_cell->mod[0], pa_pdc_cell->mod[1], |
249 | pa_pdc_cell->mod[2]); | |
1da177e4 LT |
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); | |
0d56d1aa KM |
269 | printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]); |
270 | for (i = 0; i < pa_pdc_cell->mod[1]; i++) { | |
1da177e4 LT |
271 | printk(KERN_DEBUG |
272 | " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", | |
0d56d1aa KM |
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) */ | |
1da177e4 LT |
276 | printk(KERN_DEBUG |
277 | " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n", | |
637250cc HD |
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) */ | |
1da177e4 LT |
281 | } |
282 | printk(KERN_DEBUG "\n"); | |
283 | break; | |
284 | } | |
285 | #endif /* DEBUG_PAT */ | |
0d56d1aa KM |
286 | |
287 | kfree(pa_pdc_cell); | |
288 | ||
1da177e4 LT |
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 | ||
302 | static 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 | ||
368 | static 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 */ | |
396 | static 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 | ||
a8f44e38 | 437 | #else /* !CONFIG_64BIT */ |
1da177e4 LT |
438 | |
439 | #define pat_inventory() do { } while (0) | |
440 | #define pat_memconfig() do { } while (0) | |
441 | #define sprockets_memconfig() pagezero_memconfig() | |
442 | ||
a8f44e38 | 443 | #endif /* !CONFIG_64BIT */ |
1da177e4 LT |
444 | |
445 | ||
446 | #ifndef CONFIG_PA20 | |
447 | ||
448 | /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */ | |
449 | ||
450 | static struct parisc_device * __init | |
451 | legacy_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 | */ | |
476 | static 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 | */ | |
517 | static void __init | |
518 | add_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 | ||
c4351d98 | 525 | dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL); |
1da177e4 LT |
526 | if(!dev->addr) { |
527 | printk(KERN_ERR "%s %s(): memory allocation failure\n", | |
91bae23c | 528 | __FILE__, __func__); |
1da177e4 LT |
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 | */ | |
552 | static 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 | ||
586 | void __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 | ||
613 | void __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(); | |
b37d1c18 MP |
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 | |
1da177e4 | 644 | } |