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 completely 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/export.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 37 struct node_data *__node_data[MAX_COMPACT_NODES]; 38 39 EXPORT_SYMBOL(__node_data); 40 41 static int fine_mode; 42 43 static int is_fine_dirmode(void) 44 { 45 return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE; 46 } 47 48 static 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 56 static hubreg_t region_mask; 57 58 static 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 70 static int router_distance; 71 72 static 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 } 107 108 unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES]; 109 EXPORT_SYMBOL(__node_distances); 110 111 static 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 } 177 178 static 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 } 196 197 static 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 } 257 258 static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot) 259 { 260 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); 261 262 return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT); 263 } 264 265 static unsigned long __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 } 299 300 static 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 } 353 354 static void __init szmem(void) 355 { 356 unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */ 357 int slot; 358 cnodeid_t node; 359 360 for_each_online_node(node) { 361 nodebytes = 0; 362 for (slot = 0; slot < MAX_MEM_SLOTS; slot++) { 363 slot_psize = slot_psize_compute(node, slot); 364 if (slot == 0) 365 slot0sz = slot_psize; 366 /* 367 * We need to refine the hack when we have replicated 368 * kernel text. 369 */ 370 nodebytes += (1LL << SLOT_SHIFT); 371 372 if (!slot_psize) 373 continue; 374 375 if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) > 376 (slot0sz << PAGE_SHIFT)) { 377 printk("Ignoring slot %d onwards on node %d\n", 378 slot, node); 379 slot = MAX_MEM_SLOTS; 380 continue; 381 } 382 memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)), 383 PFN_PHYS(slot_psize), node); 384 } 385 } 386 } 387 388 static void __init node_mem_init(cnodeid_t node) 389 { 390 unsigned long slot_firstpfn = slot_getbasepfn(node, 0); 391 unsigned long slot_freepfn = node_getfirstfree(node); 392 unsigned long bootmap_size; 393 unsigned long start_pfn, end_pfn; 394 395 get_pfn_range_for_nid(node, &start_pfn, &end_pfn); 396 397 /* 398 * Allocate the node data structures on the node first. 399 */ 400 __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); 401 memset(__node_data[node], 0, PAGE_SIZE); 402 403 NODE_DATA(node)->bdata = &bootmem_node_data[node]; 404 NODE_DATA(node)->node_start_pfn = start_pfn; 405 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; 406 407 cpumask_clear(&hub_data(node)->h_cpus); 408 409 slot_freepfn += PFN_UP(sizeof(struct pglist_data) + 410 sizeof(struct hub_data)); 411 412 bootmap_size = init_bootmem_node(NODE_DATA(node), slot_freepfn, 413 start_pfn, end_pfn); 414 free_bootmem_with_active_regions(node, end_pfn); 415 reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, 416 ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size, 417 BOOTMEM_DEFAULT); 418 sparse_memory_present_with_active_regions(node); 419 } 420 421 /* 422 * A node with nothing. We use it to avoid any special casing in 423 * cpumask_of_node 424 */ 425 static struct node_data null_node = { 426 .hub = { 427 .h_cpus = CPU_MASK_NONE 428 } 429 }; 430 431 /* 432 * Currently, the intranode memory hole support assumes that each slot 433 * contains at least 32 MBytes of memory. We assume all bootmem data 434 * fits on the first slot. 435 */ 436 void __init prom_meminit(void) 437 { 438 cnodeid_t node; 439 440 mlreset(); 441 szmem(); 442 443 for (node = 0; node < MAX_COMPACT_NODES; node++) { 444 if (node_online(node)) { 445 node_mem_init(node); 446 continue; 447 } 448 __node_data[node] = &null_node; 449 } 450 } 451 452 void __init prom_free_prom_memory(void) 453 { 454 /* We got nothing to free here ... */ 455 } 456 457 extern void setup_zero_pages(void); 458 459 void __init paging_init(void) 460 { 461 unsigned long zones_size[MAX_NR_ZONES] = {0, }; 462 unsigned node; 463 464 pagetable_init(); 465 466 for_each_online_node(node) { 467 unsigned long start_pfn, end_pfn; 468 469 get_pfn_range_for_nid(node, &start_pfn, &end_pfn); 470 471 if (end_pfn > max_low_pfn) 472 max_low_pfn = end_pfn; 473 } 474 zones_size[ZONE_NORMAL] = max_low_pfn; 475 free_area_init_nodes(zones_size); 476 } 477 478 void __init mem_init(void) 479 { 480 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); 481 free_all_bootmem(); 482 setup_zero_pages(); /* This comes from node 0 */ 483 mem_init_print_info(NULL); 484 } 485