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