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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2000, 05 by Ralf Baechle (ralf@linux-mips.org) | |
7 | * Copyright (C) 2000 by Silicon Graphics, Inc. | |
8 | * Copyright (C) 2004 by Christoph Hellwig | |
9 | * | |
10 | * On SGI IP27 the ARC memory configuration data is completly bogus but | |
11 | * alternate easier to use mechanisms are available. | |
12 | */ | |
13 | #include <linux/config.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/mmzone.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/nodemask.h> | |
20 | #include <linux/swap.h> | |
21 | #include <linux/bootmem.h> | |
22 | #include <asm/page.h> | |
23 | #include <asm/sections.h> | |
24 | ||
25 | #include <asm/sn/arch.h> | |
26 | #include <asm/sn/hub.h> | |
27 | #include <asm/sn/klconfig.h> | |
28 | #include <asm/sn/sn_private.h> | |
29 | ||
30 | ||
31 | #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) | |
32 | ||
33 | #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT) | |
34 | #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT) | |
35 | ||
36 | #define SLOT_IGNORED 0xffff | |
37 | ||
38 | static short __initdata slot_lastfilled_cache[MAX_COMPACT_NODES]; | |
39 | static unsigned short __initdata slot_psize_cache[MAX_COMPACT_NODES][MAX_MEM_SLOTS]; | |
40 | static struct bootmem_data __initdata plat_node_bdata[MAX_COMPACT_NODES]; | |
41 | ||
42 | struct node_data *__node_data[MAX_COMPACT_NODES]; | |
43 | ||
44 | EXPORT_SYMBOL(__node_data); | |
45 | ||
46 | static int fine_mode; | |
47 | ||
48 | static int is_fine_dirmode(void) | |
49 | { | |
50 | return (((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) | |
51 | >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE); | |
52 | } | |
53 | ||
54 | static hubreg_t get_region(cnodeid_t cnode) | |
55 | { | |
56 | if (fine_mode) | |
57 | return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT; | |
58 | else | |
59 | return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT; | |
60 | } | |
61 | ||
62 | static hubreg_t region_mask; | |
63 | ||
64 | static void gen_region_mask(hubreg_t *region_mask) | |
65 | { | |
66 | cnodeid_t cnode; | |
67 | ||
68 | (*region_mask) = 0; | |
69 | for_each_online_node(cnode) { | |
70 | (*region_mask) |= 1ULL << get_region(cnode); | |
71 | } | |
72 | } | |
73 | ||
74 | #define rou_rflag rou_flags | |
75 | ||
76 | static int router_distance; | |
77 | ||
78 | static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth) | |
79 | { | |
80 | klrou_t *router; | |
81 | lboard_t *brd; | |
82 | int port; | |
83 | ||
84 | if (router_a->rou_rflag == 1) | |
85 | return; | |
86 | ||
87 | if (depth >= router_distance) | |
88 | return; | |
89 | ||
90 | router_a->rou_rflag = 1; | |
91 | ||
92 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
93 | if (router_a->rou_port[port].port_nasid == INVALID_NASID) | |
94 | continue; | |
95 | ||
96 | brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
97 | router_a->rou_port[port].port_nasid, | |
98 | router_a->rou_port[port].port_offset); | |
99 | ||
100 | if (brd->brd_type == KLTYPE_ROUTER) { | |
101 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
102 | if (router == router_b) { | |
103 | if (depth < router_distance) | |
104 | router_distance = depth; | |
105 | } | |
106 | else | |
107 | router_recurse(router, router_b, depth + 1); | |
108 | } | |
109 | } | |
110 | ||
111 | router_a->rou_rflag = 0; | |
112 | } | |
113 | ||
114 | unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES]; | |
115 | ||
116 | static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b) | |
117 | { | |
118 | klrou_t *router, *router_a = NULL, *router_b = NULL; | |
119 | lboard_t *brd, *dest_brd; | |
120 | cnodeid_t cnode; | |
121 | nasid_t nasid; | |
122 | int port; | |
123 | ||
124 | /* Figure out which routers nodes in question are connected to */ | |
125 | for_each_online_node(cnode) { | |
126 | nasid = COMPACT_TO_NASID_NODEID(cnode); | |
127 | ||
128 | if (nasid == -1) continue; | |
129 | ||
130 | brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), | |
131 | KLTYPE_ROUTER); | |
132 | ||
133 | if (!brd) | |
134 | continue; | |
135 | ||
136 | do { | |
137 | if (brd->brd_flags & DUPLICATE_BOARD) | |
138 | continue; | |
139 | ||
140 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
141 | router->rou_rflag = 0; | |
142 | ||
143 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
144 | if (router->rou_port[port].port_nasid == INVALID_NASID) | |
145 | continue; | |
146 | ||
147 | dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
148 | router->rou_port[port].port_nasid, | |
149 | router->rou_port[port].port_offset); | |
150 | ||
151 | if (dest_brd->brd_type == KLTYPE_IP27) { | |
152 | if (dest_brd->brd_nasid == nasid_a) | |
153 | router_a = router; | |
154 | if (dest_brd->brd_nasid == nasid_b) | |
155 | router_b = router; | |
156 | } | |
157 | } | |
158 | ||
159 | } while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER))); | |
160 | } | |
161 | ||
162 | if (router_a == NULL) { | |
163 | printk("node_distance: router_a NULL\n"); | |
164 | return -1; | |
165 | } | |
166 | if (router_b == NULL) { | |
167 | printk("node_distance: router_b NULL\n"); | |
168 | return -1; | |
169 | } | |
170 | ||
171 | if (nasid_a == nasid_b) | |
172 | return 0; | |
173 | ||
174 | if (router_a == router_b) | |
175 | return 1; | |
176 | ||
177 | router_distance = 100; | |
178 | router_recurse(router_a, router_b, 2); | |
179 | ||
180 | return router_distance; | |
181 | } | |
182 | ||
183 | static void __init init_topology_matrix(void) | |
184 | { | |
185 | nasid_t nasid, nasid2; | |
186 | cnodeid_t row, col; | |
187 | ||
188 | for (row = 0; row < MAX_COMPACT_NODES; row++) | |
189 | for (col = 0; col < MAX_COMPACT_NODES; col++) | |
190 | __node_distances[row][col] = -1; | |
191 | ||
192 | for_each_online_node(row) { | |
193 | nasid = COMPACT_TO_NASID_NODEID(row); | |
194 | for_each_online_node(col) { | |
195 | nasid2 = COMPACT_TO_NASID_NODEID(col); | |
196 | __node_distances[row][col] = | |
197 | compute_node_distance(nasid, nasid2); | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | static void __init dump_topology(void) | |
203 | { | |
204 | nasid_t nasid; | |
205 | cnodeid_t cnode; | |
206 | lboard_t *brd, *dest_brd; | |
207 | int port; | |
208 | int router_num = 0; | |
209 | klrou_t *router; | |
210 | cnodeid_t row, col; | |
211 | ||
212 | printk("************** Topology ********************\n"); | |
213 | ||
214 | printk(" "); | |
215 | for_each_online_node(col) | |
216 | printk("%02d ", col); | |
217 | printk("\n"); | |
218 | for_each_online_node(row) { | |
219 | printk("%02d ", row); | |
220 | for_each_online_node(col) | |
221 | printk("%2d ", node_distance(row, col)); | |
222 | printk("\n"); | |
223 | } | |
224 | ||
225 | for_each_online_node(cnode) { | |
226 | nasid = COMPACT_TO_NASID_NODEID(cnode); | |
227 | ||
228 | if (nasid == -1) continue; | |
229 | ||
230 | brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), | |
231 | KLTYPE_ROUTER); | |
232 | ||
233 | if (!brd) | |
234 | continue; | |
235 | ||
236 | do { | |
237 | if (brd->brd_flags & DUPLICATE_BOARD) | |
238 | continue; | |
239 | printk("Router %d:", router_num); | |
240 | router_num++; | |
241 | ||
242 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
243 | ||
244 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
245 | if (router->rou_port[port].port_nasid == INVALID_NASID) | |
246 | continue; | |
247 | ||
248 | dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
249 | router->rou_port[port].port_nasid, | |
250 | router->rou_port[port].port_offset); | |
251 | ||
252 | if (dest_brd->brd_type == KLTYPE_IP27) | |
253 | printk(" %d", dest_brd->brd_nasid); | |
254 | if (dest_brd->brd_type == KLTYPE_ROUTER) | |
255 | printk(" r"); | |
256 | } | |
257 | printk("\n"); | |
258 | ||
259 | } while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) ); | |
260 | } | |
261 | } | |
262 | ||
263 | static pfn_t __init slot_getbasepfn(cnodeid_t cnode, int slot) | |
264 | { | |
265 | nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); | |
266 | ||
267 | return ((pfn_t)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT); | |
268 | } | |
269 | ||
270 | /* | |
271 | * Return the number of pages of memory provided by the given slot | |
272 | * on the specified node. | |
273 | */ | |
274 | static pfn_t __init slot_getsize(cnodeid_t node, int slot) | |
275 | { | |
276 | return (pfn_t) slot_psize_cache[node][slot]; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Return highest slot filled | |
281 | */ | |
282 | static int __init node_getlastslot(cnodeid_t node) | |
283 | { | |
284 | return (int) slot_lastfilled_cache[node]; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Return the pfn of the last free page of memory on a node. | |
289 | */ | |
290 | static pfn_t __init node_getmaxclick(cnodeid_t node) | |
291 | { | |
292 | pfn_t slot_psize; | |
293 | int slot; | |
294 | ||
295 | /* | |
296 | * Start at the top slot. When we find a slot with memory in it, | |
297 | * that's the winner. | |
298 | */ | |
299 | for (slot = (MAX_MEM_SLOTS - 1); slot >= 0; slot--) { | |
300 | if ((slot_psize = slot_getsize(node, slot))) { | |
301 | if (slot_psize == SLOT_IGNORED) | |
302 | continue; | |
303 | /* Return the basepfn + the slot size, minus 1. */ | |
304 | return slot_getbasepfn(node, slot) + slot_psize - 1; | |
305 | } | |
306 | } | |
307 | ||
308 | /* | |
309 | * If there's no memory on the node, return 0. This is likely | |
310 | * to cause problems. | |
311 | */ | |
312 | return 0; | |
313 | } | |
314 | ||
315 | static pfn_t __init slot_psize_compute(cnodeid_t node, int slot) | |
316 | { | |
317 | nasid_t nasid; | |
318 | lboard_t *brd; | |
319 | klmembnk_t *banks; | |
320 | unsigned long size; | |
321 | ||
322 | nasid = COMPACT_TO_NASID_NODEID(node); | |
323 | /* Find the node board */ | |
324 | brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27); | |
325 | if (!brd) | |
326 | return 0; | |
327 | ||
328 | /* Get the memory bank structure */ | |
329 | banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK); | |
330 | if (!banks) | |
331 | return 0; | |
332 | ||
333 | /* Size in _Megabytes_ */ | |
334 | size = (unsigned long)banks->membnk_bnksz[slot/4]; | |
335 | ||
336 | /* hack for 128 dimm banks */ | |
337 | if (size <= 128) { | |
338 | if (slot % 4 == 0) { | |
339 | size <<= 20; /* size in bytes */ | |
340 | return(size >> PAGE_SHIFT); | |
341 | } else | |
342 | return 0; | |
343 | } else { | |
344 | size /= 4; | |
345 | size <<= 20; | |
346 | return size >> PAGE_SHIFT; | |
347 | } | |
348 | } | |
349 | ||
350 | static void __init mlreset(void) | |
351 | { | |
352 | int i; | |
353 | ||
354 | master_nasid = get_nasid(); | |
355 | fine_mode = is_fine_dirmode(); | |
356 | ||
357 | /* | |
358 | * Probe for all CPUs - this creates the cpumask and sets up the | |
359 | * mapping tables. We need to do this as early as possible. | |
360 | */ | |
361 | #ifdef CONFIG_SMP | |
362 | cpu_node_probe(); | |
363 | #endif | |
364 | ||
365 | init_topology_matrix(); | |
366 | dump_topology(); | |
367 | ||
368 | gen_region_mask(®ion_mask); | |
369 | ||
370 | setup_replication_mask(); | |
371 | ||
372 | /* | |
373 | * Set all nodes' calias sizes to 8k | |
374 | */ | |
375 | for_each_online_node(i) { | |
376 | nasid_t nasid; | |
377 | ||
378 | nasid = COMPACT_TO_NASID_NODEID(i); | |
379 | ||
380 | /* | |
381 | * Always have node 0 in the region mask, otherwise | |
382 | * CALIAS accesses get exceptions since the hub | |
383 | * thinks it is a node 0 address. | |
384 | */ | |
385 | REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1)); | |
386 | #ifdef CONFIG_REPLICATE_EXHANDLERS | |
387 | REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K); | |
388 | #else | |
389 | REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0); | |
390 | #endif | |
391 | ||
392 | #ifdef LATER | |
393 | /* | |
394 | * Set up all hubs to have a big window pointing at | |
395 | * widget 0. Memory mode, widget 0, offset 0 | |
396 | */ | |
397 | REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN), | |
398 | ((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) | | |
399 | (0 << IIO_ITTE_WIDGET_SHIFT))); | |
400 | #endif | |
401 | } | |
402 | } | |
403 | ||
404 | static void __init szmem(void) | |
405 | { | |
406 | pfn_t slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */ | |
407 | int slot, ignore; | |
408 | cnodeid_t node; | |
409 | ||
410 | num_physpages = 0; | |
411 | ||
412 | for_each_online_node(node) { | |
413 | ignore = nodebytes = 0; | |
414 | for (slot = 0; slot < MAX_MEM_SLOTS; slot++) { | |
415 | slot_psize = slot_psize_compute(node, slot); | |
416 | if (slot == 0) | |
417 | slot0sz = slot_psize; | |
418 | /* | |
419 | * We need to refine the hack when we have replicated | |
420 | * kernel text. | |
421 | */ | |
422 | nodebytes += (1LL << SLOT_SHIFT); | |
423 | if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) > | |
424 | (slot0sz << PAGE_SHIFT)) | |
425 | ignore = 1; | |
426 | if (ignore && slot_psize) { | |
427 | printk("Ignoring slot %d onwards on node %d\n", | |
428 | slot, node); | |
429 | slot_psize_cache[node][slot] = SLOT_IGNORED; | |
430 | slot = MAX_MEM_SLOTS; | |
431 | continue; | |
432 | } | |
433 | num_physpages += slot_psize; | |
434 | slot_psize_cache[node][slot] = | |
435 | (unsigned short) slot_psize; | |
436 | if (slot_psize) | |
437 | slot_lastfilled_cache[node] = slot; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | static void __init node_mem_init(cnodeid_t node) | |
443 | { | |
444 | pfn_t slot_firstpfn = slot_getbasepfn(node, 0); | |
445 | pfn_t slot_lastpfn = slot_firstpfn + slot_getsize(node, 0); | |
446 | pfn_t slot_freepfn = node_getfirstfree(node); | |
447 | struct pglist_data *pd; | |
448 | unsigned long bootmap_size; | |
449 | ||
450 | /* | |
451 | * Allocate the node data structures on the node first. | |
452 | */ | |
453 | __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); | |
454 | ||
455 | pd = NODE_DATA(node); | |
456 | pd->bdata = &plat_node_bdata[node]; | |
457 | ||
458 | cpus_clear(hub_data(node)->h_cpus); | |
459 | ||
460 | slot_freepfn += PFN_UP(sizeof(struct pglist_data) + | |
461 | sizeof(struct hub_data)); | |
462 | ||
463 | bootmap_size = init_bootmem_node(NODE_DATA(node), slot_freepfn, | |
464 | slot_firstpfn, slot_lastpfn); | |
465 | free_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, | |
466 | (slot_lastpfn - slot_firstpfn) << PAGE_SHIFT); | |
467 | reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, | |
468 | ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size); | |
469 | } | |
470 | ||
471 | /* | |
472 | * A node with nothing. We use it to avoid any special casing in | |
473 | * node_to_cpumask | |
474 | */ | |
475 | static struct node_data null_node = { | |
476 | .hub = { | |
477 | .h_cpus = CPU_MASK_NONE | |
478 | } | |
479 | }; | |
480 | ||
481 | /* | |
482 | * Currently, the intranode memory hole support assumes that each slot | |
483 | * contains at least 32 MBytes of memory. We assume all bootmem data | |
484 | * fits on the first slot. | |
485 | */ | |
486 | void __init prom_meminit(void) | |
487 | { | |
488 | cnodeid_t node; | |
489 | ||
490 | mlreset(); | |
491 | szmem(); | |
492 | ||
493 | for (node = 0; node < MAX_COMPACT_NODES; node++) { | |
494 | if (node_online(node)) { | |
495 | node_mem_init(node); | |
496 | continue; | |
497 | } | |
498 | __node_data[node] = &null_node; | |
499 | } | |
500 | } | |
501 | ||
502 | unsigned long __init prom_free_prom_memory(void) | |
503 | { | |
504 | /* We got nothing to free here ... */ | |
505 | return 0; | |
506 | } | |
507 | ||
508 | extern void pagetable_init(void); | |
509 | extern unsigned long setup_zero_pages(void); | |
510 | ||
511 | void __init paging_init(void) | |
512 | { | |
513 | unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0}; | |
514 | unsigned node; | |
515 | ||
516 | pagetable_init(); | |
517 | ||
518 | for_each_online_node(node) { | |
519 | pfn_t start_pfn = slot_getbasepfn(node, 0); | |
520 | pfn_t end_pfn = node_getmaxclick(node) + 1; | |
521 | ||
522 | zones_size[ZONE_DMA] = end_pfn - start_pfn; | |
523 | free_area_init_node(node, NODE_DATA(node), | |
524 | zones_size, start_pfn, NULL); | |
525 | ||
526 | if (end_pfn > max_low_pfn) | |
527 | max_low_pfn = end_pfn; | |
528 | } | |
529 | } | |
530 | ||
531 | void __init mem_init(void) | |
532 | { | |
533 | unsigned long codesize, datasize, initsize, tmp; | |
534 | unsigned node; | |
535 | ||
536 | high_memory = (void *) __va(num_physpages << PAGE_SHIFT); | |
537 | ||
538 | for_each_online_node(node) { | |
539 | unsigned slot, numslots; | |
540 | struct page *end, *p; | |
42a3b4f2 | 541 | |
1da177e4 | 542 | /* |
a3dddd56 RB |
543 | * This will free up the bootmem, ie, slot 0 memory. |
544 | */ | |
1da177e4 LT |
545 | totalram_pages += free_all_bootmem_node(NODE_DATA(node)); |
546 | ||
547 | /* | |
548 | * We need to manually do the other slots. | |
549 | */ | |
550 | numslots = node_getlastslot(node); | |
551 | for (slot = 1; slot <= numslots; slot++) { | |
408fde81 DH |
552 | p = nid_page_nr(node, slot_getbasepfn(node, slot) - |
553 | slot_getbasepfn(node, 0)); | |
1da177e4 LT |
554 | |
555 | /* | |
556 | * Free valid memory in current slot. | |
557 | */ | |
558 | for (end = p + slot_getsize(node, slot); p < end; p++) { | |
559 | /* if (!page_is_ram(pgnr)) continue; */ | |
560 | /* commented out until page_is_ram works */ | |
561 | ClearPageReserved(p); | |
7835e98b | 562 | init_page_count(p); |
1da177e4 LT |
563 | __free_page(p); |
564 | totalram_pages++; | |
565 | } | |
566 | } | |
567 | } | |
568 | ||
569 | totalram_pages -= setup_zero_pages(); /* This comes from node 0 */ | |
570 | ||
571 | codesize = (unsigned long) &_etext - (unsigned long) &_text; | |
572 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
573 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
574 | ||
575 | tmp = nr_free_pages(); | |
576 | printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " | |
577 | "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n", | |
578 | tmp << (PAGE_SHIFT-10), | |
579 | num_physpages << (PAGE_SHIFT-10), | |
580 | codesize >> 10, | |
581 | (num_physpages - tmp) << (PAGE_SHIFT-10), | |
582 | datasize >> 10, | |
583 | initsize >> 10, | |
584 | (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))); | |
585 | } |