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