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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 | */ | |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/kernel.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/mmzone.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/nodemask.h> | |
19 | #include <linux/swap.h> | |
20 | #include <linux/bootmem.h> | |
22a9835c | 21 | #include <linux/pfn.h> |
c1f60a5a | 22 | #include <linux/highmem.h> |
1da177e4 LT |
23 | #include <asm/page.h> |
24 | #include <asm/sections.h> | |
25 | ||
26 | #include <asm/sn/arch.h> | |
27 | #include <asm/sn/hub.h> | |
28 | #include <asm/sn/klconfig.h> | |
29 | #include <asm/sn/sn_private.h> | |
30 | ||
31 | ||
1da177e4 LT |
32 | #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT) |
33 | #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT) | |
34 | ||
35 | #define SLOT_IGNORED 0xffff | |
36 | ||
37 | static short __initdata slot_lastfilled_cache[MAX_COMPACT_NODES]; | |
38 | static unsigned short __initdata slot_psize_cache[MAX_COMPACT_NODES][MAX_MEM_SLOTS]; | |
39 | static struct bootmem_data __initdata plat_node_bdata[MAX_COMPACT_NODES]; | |
40 | ||
41 | struct node_data *__node_data[MAX_COMPACT_NODES]; | |
42 | ||
43 | EXPORT_SYMBOL(__node_data); | |
44 | ||
45 | static int fine_mode; | |
46 | ||
47 | static int is_fine_dirmode(void) | |
48 | { | |
49 | return (((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) | |
50 | >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE); | |
51 | } | |
52 | ||
53 | static hubreg_t get_region(cnodeid_t cnode) | |
54 | { | |
55 | if (fine_mode) | |
56 | return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT; | |
57 | else | |
58 | return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT; | |
59 | } | |
60 | ||
61 | static hubreg_t region_mask; | |
62 | ||
63 | static void gen_region_mask(hubreg_t *region_mask) | |
64 | { | |
65 | cnodeid_t cnode; | |
66 | ||
67 | (*region_mask) = 0; | |
68 | for_each_online_node(cnode) { | |
69 | (*region_mask) |= 1ULL << get_region(cnode); | |
70 | } | |
71 | } | |
72 | ||
73 | #define rou_rflag rou_flags | |
74 | ||
75 | static int router_distance; | |
76 | ||
77 | static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth) | |
78 | { | |
79 | klrou_t *router; | |
80 | lboard_t *brd; | |
81 | int port; | |
82 | ||
83 | if (router_a->rou_rflag == 1) | |
84 | return; | |
85 | ||
86 | if (depth >= router_distance) | |
87 | return; | |
88 | ||
89 | router_a->rou_rflag = 1; | |
90 | ||
91 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
92 | if (router_a->rou_port[port].port_nasid == INVALID_NASID) | |
93 | continue; | |
94 | ||
95 | brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
96 | router_a->rou_port[port].port_nasid, | |
97 | router_a->rou_port[port].port_offset); | |
98 | ||
99 | if (brd->brd_type == KLTYPE_ROUTER) { | |
100 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
101 | if (router == router_b) { | |
102 | if (depth < router_distance) | |
103 | router_distance = depth; | |
104 | } | |
105 | else | |
106 | router_recurse(router, router_b, depth + 1); | |
107 | } | |
108 | } | |
109 | ||
110 | router_a->rou_rflag = 0; | |
111 | } | |
112 | ||
113 | unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES]; | |
114 | ||
115 | static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b) | |
116 | { | |
117 | klrou_t *router, *router_a = NULL, *router_b = NULL; | |
118 | lboard_t *brd, *dest_brd; | |
119 | cnodeid_t cnode; | |
120 | nasid_t nasid; | |
121 | int port; | |
122 | ||
123 | /* Figure out which routers nodes in question are connected to */ | |
124 | for_each_online_node(cnode) { | |
125 | nasid = COMPACT_TO_NASID_NODEID(cnode); | |
126 | ||
127 | if (nasid == -1) continue; | |
128 | ||
129 | brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), | |
130 | KLTYPE_ROUTER); | |
131 | ||
132 | if (!brd) | |
133 | continue; | |
134 | ||
135 | do { | |
136 | if (brd->brd_flags & DUPLICATE_BOARD) | |
137 | continue; | |
138 | ||
139 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
140 | router->rou_rflag = 0; | |
141 | ||
142 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
143 | if (router->rou_port[port].port_nasid == INVALID_NASID) | |
144 | continue; | |
145 | ||
146 | dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
147 | router->rou_port[port].port_nasid, | |
148 | router->rou_port[port].port_offset); | |
149 | ||
150 | if (dest_brd->brd_type == KLTYPE_IP27) { | |
151 | if (dest_brd->brd_nasid == nasid_a) | |
152 | router_a = router; | |
153 | if (dest_brd->brd_nasid == nasid_b) | |
154 | router_b = router; | |
155 | } | |
156 | } | |
157 | ||
158 | } while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER))); | |
159 | } | |
160 | ||
161 | if (router_a == NULL) { | |
162 | printk("node_distance: router_a NULL\n"); | |
163 | return -1; | |
164 | } | |
165 | if (router_b == NULL) { | |
166 | printk("node_distance: router_b NULL\n"); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | if (nasid_a == nasid_b) | |
171 | return 0; | |
172 | ||
173 | if (router_a == router_b) | |
174 | return 1; | |
175 | ||
176 | router_distance = 100; | |
177 | router_recurse(router_a, router_b, 2); | |
178 | ||
179 | return router_distance; | |
180 | } | |
181 | ||
182 | static void __init init_topology_matrix(void) | |
183 | { | |
184 | nasid_t nasid, nasid2; | |
185 | cnodeid_t row, col; | |
186 | ||
187 | for (row = 0; row < MAX_COMPACT_NODES; row++) | |
188 | for (col = 0; col < MAX_COMPACT_NODES; col++) | |
189 | __node_distances[row][col] = -1; | |
190 | ||
191 | for_each_online_node(row) { | |
192 | nasid = COMPACT_TO_NASID_NODEID(row); | |
193 | for_each_online_node(col) { | |
194 | nasid2 = COMPACT_TO_NASID_NODEID(col); | |
195 | __node_distances[row][col] = | |
196 | compute_node_distance(nasid, nasid2); | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | static void __init dump_topology(void) | |
202 | { | |
203 | nasid_t nasid; | |
204 | cnodeid_t cnode; | |
205 | lboard_t *brd, *dest_brd; | |
206 | int port; | |
207 | int router_num = 0; | |
208 | klrou_t *router; | |
209 | cnodeid_t row, col; | |
210 | ||
211 | printk("************** Topology ********************\n"); | |
212 | ||
213 | printk(" "); | |
214 | for_each_online_node(col) | |
215 | printk("%02d ", col); | |
216 | printk("\n"); | |
217 | for_each_online_node(row) { | |
218 | printk("%02d ", row); | |
219 | for_each_online_node(col) | |
220 | printk("%2d ", node_distance(row, col)); | |
221 | printk("\n"); | |
222 | } | |
223 | ||
224 | for_each_online_node(cnode) { | |
225 | nasid = COMPACT_TO_NASID_NODEID(cnode); | |
226 | ||
227 | if (nasid == -1) continue; | |
228 | ||
229 | brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), | |
230 | KLTYPE_ROUTER); | |
231 | ||
232 | if (!brd) | |
233 | continue; | |
234 | ||
235 | do { | |
236 | if (brd->brd_flags & DUPLICATE_BOARD) | |
237 | continue; | |
238 | printk("Router %d:", router_num); | |
239 | router_num++; | |
240 | ||
241 | router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); | |
242 | ||
243 | for (port = 1; port <= MAX_ROUTER_PORTS; port++) { | |
244 | if (router->rou_port[port].port_nasid == INVALID_NASID) | |
245 | continue; | |
246 | ||
247 | dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( | |
248 | router->rou_port[port].port_nasid, | |
249 | router->rou_port[port].port_offset); | |
250 | ||
251 | if (dest_brd->brd_type == KLTYPE_IP27) | |
252 | printk(" %d", dest_brd->brd_nasid); | |
253 | if (dest_brd->brd_type == KLTYPE_ROUTER) | |
254 | printk(" r"); | |
255 | } | |
256 | printk("\n"); | |
257 | ||
258 | } while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) ); | |
259 | } | |
260 | } | |
261 | ||
262 | static pfn_t __init slot_getbasepfn(cnodeid_t cnode, int slot) | |
263 | { | |
264 | nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); | |
265 | ||
266 | return ((pfn_t)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT); | |
267 | } | |
268 | ||
269 | /* | |
270 | * Return the number of pages of memory provided by the given slot | |
271 | * on the specified node. | |
272 | */ | |
273 | static pfn_t __init slot_getsize(cnodeid_t node, int slot) | |
274 | { | |
275 | return (pfn_t) slot_psize_cache[node][slot]; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Return highest slot filled | |
280 | */ | |
281 | static int __init node_getlastslot(cnodeid_t node) | |
282 | { | |
283 | return (int) slot_lastfilled_cache[node]; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Return the pfn of the last free page of memory on a node. | |
288 | */ | |
289 | static pfn_t __init node_getmaxclick(cnodeid_t node) | |
290 | { | |
291 | pfn_t slot_psize; | |
292 | int slot; | |
293 | ||
294 | /* | |
295 | * Start at the top slot. When we find a slot with memory in it, | |
296 | * that's the winner. | |
297 | */ | |
298 | for (slot = (MAX_MEM_SLOTS - 1); slot >= 0; slot--) { | |
299 | if ((slot_psize = slot_getsize(node, slot))) { | |
300 | if (slot_psize == SLOT_IGNORED) | |
301 | continue; | |
302 | /* Return the basepfn + the slot size, minus 1. */ | |
303 | return slot_getbasepfn(node, slot) + slot_psize - 1; | |
304 | } | |
305 | } | |
306 | ||
307 | /* | |
308 | * If there's no memory on the node, return 0. This is likely | |
309 | * to cause problems. | |
310 | */ | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static pfn_t __init slot_psize_compute(cnodeid_t node, int slot) | |
315 | { | |
316 | nasid_t nasid; | |
317 | lboard_t *brd; | |
318 | klmembnk_t *banks; | |
319 | unsigned long size; | |
320 | ||
321 | nasid = COMPACT_TO_NASID_NODEID(node); | |
322 | /* Find the node board */ | |
323 | brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27); | |
324 | if (!brd) | |
325 | return 0; | |
326 | ||
327 | /* Get the memory bank structure */ | |
328 | banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK); | |
329 | if (!banks) | |
330 | return 0; | |
331 | ||
332 | /* Size in _Megabytes_ */ | |
333 | size = (unsigned long)banks->membnk_bnksz[slot/4]; | |
334 | ||
335 | /* hack for 128 dimm banks */ | |
336 | if (size <= 128) { | |
337 | if (slot % 4 == 0) { | |
338 | size <<= 20; /* size in bytes */ | |
339 | return(size >> PAGE_SHIFT); | |
340 | } else | |
341 | return 0; | |
342 | } else { | |
343 | size /= 4; | |
344 | size <<= 20; | |
345 | return size >> PAGE_SHIFT; | |
346 | } | |
347 | } | |
348 | ||
349 | static void __init mlreset(void) | |
350 | { | |
351 | int i; | |
352 | ||
353 | master_nasid = get_nasid(); | |
354 | fine_mode = is_fine_dirmode(); | |
355 | ||
356 | /* | |
357 | * Probe for all CPUs - this creates the cpumask and sets up the | |
358 | * mapping tables. We need to do this as early as possible. | |
359 | */ | |
360 | #ifdef CONFIG_SMP | |
361 | cpu_node_probe(); | |
362 | #endif | |
363 | ||
364 | init_topology_matrix(); | |
365 | dump_topology(); | |
366 | ||
367 | gen_region_mask(®ion_mask); | |
368 | ||
369 | setup_replication_mask(); | |
370 | ||
371 | /* | |
372 | * Set all nodes' calias sizes to 8k | |
373 | */ | |
374 | for_each_online_node(i) { | |
375 | nasid_t nasid; | |
376 | ||
377 | nasid = COMPACT_TO_NASID_NODEID(i); | |
378 | ||
379 | /* | |
380 | * Always have node 0 in the region mask, otherwise | |
381 | * CALIAS accesses get exceptions since the hub | |
382 | * thinks it is a node 0 address. | |
383 | */ | |
384 | REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1)); | |
385 | #ifdef CONFIG_REPLICATE_EXHANDLERS | |
386 | REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K); | |
387 | #else | |
388 | REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0); | |
389 | #endif | |
390 | ||
391 | #ifdef LATER | |
392 | /* | |
393 | * Set up all hubs to have a big window pointing at | |
394 | * widget 0. Memory mode, widget 0, offset 0 | |
395 | */ | |
396 | REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN), | |
397 | ((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) | | |
398 | (0 << IIO_ITTE_WIDGET_SHIFT))); | |
399 | #endif | |
400 | } | |
401 | } | |
402 | ||
403 | static void __init szmem(void) | |
404 | { | |
405 | pfn_t slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */ | |
406 | int slot, ignore; | |
407 | cnodeid_t node; | |
408 | ||
409 | num_physpages = 0; | |
410 | ||
411 | for_each_online_node(node) { | |
412 | ignore = nodebytes = 0; | |
413 | for (slot = 0; slot < MAX_MEM_SLOTS; slot++) { | |
414 | slot_psize = slot_psize_compute(node, slot); | |
415 | if (slot == 0) | |
416 | slot0sz = slot_psize; | |
417 | /* | |
418 | * We need to refine the hack when we have replicated | |
419 | * kernel text. | |
420 | */ | |
421 | nodebytes += (1LL << SLOT_SHIFT); | |
422 | if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) > | |
423 | (slot0sz << PAGE_SHIFT)) | |
424 | ignore = 1; | |
425 | if (ignore && slot_psize) { | |
426 | printk("Ignoring slot %d onwards on node %d\n", | |
427 | slot, node); | |
428 | slot_psize_cache[node][slot] = SLOT_IGNORED; | |
429 | slot = MAX_MEM_SLOTS; | |
430 | continue; | |
431 | } | |
432 | num_physpages += slot_psize; | |
433 | slot_psize_cache[node][slot] = | |
434 | (unsigned short) slot_psize; | |
435 | if (slot_psize) | |
436 | slot_lastfilled_cache[node] = slot; | |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | static void __init node_mem_init(cnodeid_t node) | |
442 | { | |
443 | pfn_t slot_firstpfn = slot_getbasepfn(node, 0); | |
444 | pfn_t slot_lastpfn = slot_firstpfn + slot_getsize(node, 0); | |
445 | pfn_t slot_freepfn = node_getfirstfree(node); | |
446 | struct pglist_data *pd; | |
447 | unsigned long bootmap_size; | |
448 | ||
449 | /* | |
450 | * Allocate the node data structures on the node first. | |
451 | */ | |
452 | __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); | |
453 | ||
454 | pd = NODE_DATA(node); | |
455 | pd->bdata = &plat_node_bdata[node]; | |
456 | ||
457 | cpus_clear(hub_data(node)->h_cpus); | |
458 | ||
459 | slot_freepfn += PFN_UP(sizeof(struct pglist_data) + | |
460 | sizeof(struct hub_data)); | |
461 | ||
462 | bootmap_size = init_bootmem_node(NODE_DATA(node), slot_freepfn, | |
463 | slot_firstpfn, slot_lastpfn); | |
464 | free_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, | |
465 | (slot_lastpfn - slot_firstpfn) << PAGE_SHIFT); | |
466 | reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, | |
467 | ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size); | |
468 | } | |
469 | ||
470 | /* | |
471 | * A node with nothing. We use it to avoid any special casing in | |
472 | * node_to_cpumask | |
473 | */ | |
474 | static struct node_data null_node = { | |
475 | .hub = { | |
476 | .h_cpus = CPU_MASK_NONE | |
477 | } | |
478 | }; | |
479 | ||
480 | /* | |
481 | * Currently, the intranode memory hole support assumes that each slot | |
482 | * contains at least 32 MBytes of memory. We assume all bootmem data | |
483 | * fits on the first slot. | |
484 | */ | |
485 | void __init prom_meminit(void) | |
486 | { | |
487 | cnodeid_t node; | |
488 | ||
489 | mlreset(); | |
490 | szmem(); | |
491 | ||
492 | for (node = 0; node < MAX_COMPACT_NODES; node++) { | |
493 | if (node_online(node)) { | |
494 | node_mem_init(node); | |
495 | continue; | |
496 | } | |
497 | __node_data[node] = &null_node; | |
498 | } | |
499 | } | |
500 | ||
501 | unsigned long __init prom_free_prom_memory(void) | |
502 | { | |
503 | /* We got nothing to free here ... */ | |
504 | return 0; | |
505 | } | |
506 | ||
507 | extern void pagetable_init(void); | |
508 | extern unsigned long setup_zero_pages(void); | |
509 | ||
510 | void __init paging_init(void) | |
511 | { | |
f06a9684 | 512 | unsigned long zones_size[MAX_NR_ZONES] = {0, }; |
1da177e4 LT |
513 | unsigned node; |
514 | ||
515 | pagetable_init(); | |
516 | ||
517 | for_each_online_node(node) { | |
518 | pfn_t start_pfn = slot_getbasepfn(node, 0); | |
519 | pfn_t end_pfn = node_getmaxclick(node) + 1; | |
520 | ||
521 | zones_size[ZONE_DMA] = end_pfn - start_pfn; | |
522 | free_area_init_node(node, NODE_DATA(node), | |
523 | zones_size, start_pfn, NULL); | |
524 | ||
525 | if (end_pfn > max_low_pfn) | |
526 | max_low_pfn = end_pfn; | |
527 | } | |
528 | } | |
529 | ||
530 | void __init mem_init(void) | |
531 | { | |
532 | unsigned long codesize, datasize, initsize, tmp; | |
533 | unsigned node; | |
534 | ||
535 | high_memory = (void *) __va(num_physpages << PAGE_SHIFT); | |
536 | ||
537 | for_each_online_node(node) { | |
538 | unsigned slot, numslots; | |
539 | struct page *end, *p; | |
42a3b4f2 | 540 | |
1da177e4 | 541 | /* |
a3dddd56 RB |
542 | * This will free up the bootmem, ie, slot 0 memory. |
543 | */ | |
1da177e4 LT |
544 | totalram_pages += free_all_bootmem_node(NODE_DATA(node)); |
545 | ||
546 | /* | |
547 | * We need to manually do the other slots. | |
548 | */ | |
549 | numslots = node_getlastslot(node); | |
550 | for (slot = 1; slot <= numslots; slot++) { | |
408fde81 DH |
551 | p = nid_page_nr(node, slot_getbasepfn(node, slot) - |
552 | slot_getbasepfn(node, 0)); | |
1da177e4 LT |
553 | |
554 | /* | |
555 | * Free valid memory in current slot. | |
556 | */ | |
557 | for (end = p + slot_getsize(node, slot); p < end; p++) { | |
558 | /* if (!page_is_ram(pgnr)) continue; */ | |
559 | /* commented out until page_is_ram works */ | |
560 | ClearPageReserved(p); | |
7835e98b | 561 | init_page_count(p); |
1da177e4 LT |
562 | __free_page(p); |
563 | totalram_pages++; | |
564 | } | |
565 | } | |
566 | } | |
567 | ||
568 | totalram_pages -= setup_zero_pages(); /* This comes from node 0 */ | |
569 | ||
570 | codesize = (unsigned long) &_etext - (unsigned long) &_text; | |
571 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
572 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
573 | ||
574 | tmp = nr_free_pages(); | |
575 | printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " | |
576 | "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n", | |
577 | tmp << (PAGE_SHIFT-10), | |
578 | num_physpages << (PAGE_SHIFT-10), | |
579 | codesize >> 10, | |
580 | (num_physpages - tmp) << (PAGE_SHIFT-10), | |
581 | datasize >> 10, | |
582 | initsize >> 10, | |
583 | (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))); | |
584 | } |