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
7 * Copyright (C) 2000 by Silicon Graphics, Inc.
8 * Copyright (C) 2004 by Christoph Hellwig
10 * On SGI IP27 the ARC memory configuration data is completely bogus but
11 * alternate easier to use mechanisms are available.
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/memblock.h>
17 #include <linux/mmzone.h>
18 #include <linux/export.h>
19 #include <linux/nodemask.h>
20 #include <linux/swap.h>
21 #include <linux/pfn.h>
22 #include <linux/highmem.h>
24 #include <asm/pgalloc.h>
25 #include <asm/sections.h>
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>
33 #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT)
34 #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT)
36 struct node_data *__node_data[MAX_COMPACT_NODES];
38 EXPORT_SYMBOL(__node_data);
42 static int is_fine_dirmode(void)
44 return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
47 static hubreg_t get_region(cnodeid_t cnode)
50 return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT;
52 return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT;
55 static hubreg_t region_mask;
57 static void gen_region_mask(hubreg_t *region_mask)
62 for_each_online_node(cnode) {
63 (*region_mask) |= 1ULL << get_region(cnode);
67 #define rou_rflag rou_flags
69 static int router_distance;
71 static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth)
77 if (router_a->rou_rflag == 1)
80 if (depth >= router_distance)
83 router_a->rou_rflag = 1;
85 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
86 if (router_a->rou_port[port].port_nasid == INVALID_NASID)
89 brd = (lboard_t *)NODE_OFFSET_TO_K0(
90 router_a->rou_port[port].port_nasid,
91 router_a->rou_port[port].port_offset);
93 if (brd->brd_type == KLTYPE_ROUTER) {
94 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
95 if (router == router_b) {
96 if (depth < router_distance)
97 router_distance = depth;
100 router_recurse(router, router_b, depth + 1);
104 router_a->rou_rflag = 0;
107 unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
108 EXPORT_SYMBOL(__node_distances);
110 static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
112 klrou_t *router, *router_a = NULL, *router_b = NULL;
113 lboard_t *brd, *dest_brd;
118 /* Figure out which routers nodes in question are connected to */
119 for_each_online_node(cnode) {
120 nasid = COMPACT_TO_NASID_NODEID(cnode);
122 if (nasid == -1) continue;
124 brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
131 if (brd->brd_flags & DUPLICATE_BOARD)
134 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
135 router->rou_rflag = 0;
137 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
138 if (router->rou_port[port].port_nasid == INVALID_NASID)
141 dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
142 router->rou_port[port].port_nasid,
143 router->rou_port[port].port_offset);
145 if (dest_brd->brd_type == KLTYPE_IP27) {
146 if (dest_brd->brd_nasid == nasid_a)
148 if (dest_brd->brd_nasid == nasid_b)
153 } while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
156 if (router_a == NULL) {
157 printk("node_distance: router_a NULL\n");
160 if (router_b == NULL) {
161 printk("node_distance: router_b NULL\n");
165 if (nasid_a == nasid_b)
168 if (router_a == router_b)
171 router_distance = 100;
172 router_recurse(router_a, router_b, 2);
174 return router_distance;
177 static void __init init_topology_matrix(void)
179 nasid_t nasid, nasid2;
182 for (row = 0; row < MAX_COMPACT_NODES; row++)
183 for (col = 0; col < MAX_COMPACT_NODES; col++)
184 __node_distances[row][col] = -1;
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);
196 static void __init dump_topology(void)
200 lboard_t *brd, *dest_brd;
206 printk("************** Topology ********************\n");
209 for_each_online_node(col)
210 printk("%02d ", col);
212 for_each_online_node(row) {
213 printk("%02d ", row);
214 for_each_online_node(col)
215 printk("%2d ", node_distance(row, col));
219 for_each_online_node(cnode) {
220 nasid = COMPACT_TO_NASID_NODEID(cnode);
222 if (nasid == -1) continue;
224 brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
231 if (brd->brd_flags & DUPLICATE_BOARD)
233 printk("Router %d:", router_num);
236 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
238 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
239 if (router->rou_port[port].port_nasid == INVALID_NASID)
242 dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
243 router->rou_port[port].port_nasid,
244 router->rou_port[port].port_offset);
246 if (dest_brd->brd_type == KLTYPE_IP27)
247 printk(" %d", dest_brd->brd_nasid);
248 if (dest_brd->brd_type == KLTYPE_ROUTER)
253 } while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
257 static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
259 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
261 return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
264 static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
271 nasid = COMPACT_TO_NASID_NODEID(node);
272 /* Find the node board */
273 brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
277 /* Get the memory bank structure */
278 banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
282 /* Size in _Megabytes_ */
283 size = (unsigned long)banks->membnk_bnksz[slot/4];
285 /* hack for 128 dimm banks */
288 size <<= 20; /* size in bytes */
289 return size >> PAGE_SHIFT;
295 return size >> PAGE_SHIFT;
299 static void __init mlreset(void)
303 master_nasid = get_nasid();
304 fine_mode = is_fine_dirmode();
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.
314 init_topology_matrix();
317 gen_region_mask(®ion_mask);
319 setup_replication_mask();
322 * Set all nodes' calias sizes to 8k
324 for_each_online_node(i) {
327 nasid = COMPACT_TO_NASID_NODEID(i);
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.
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);
338 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
343 * Set up all hubs to have a big window pointing at
344 * widget 0. Memory mode, widget 0, offset 0
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)));
353 static void __init szmem(void)
355 unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
359 for_each_online_node(node) {
361 for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
362 slot_psize = slot_psize_compute(node, slot);
364 slot0sz = slot_psize;
366 * We need to refine the hack when we have replicated
369 nodebytes += (1LL << SLOT_SHIFT);
374 if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
375 (slot0sz << PAGE_SHIFT)) {
376 printk("Ignoring slot %d onwards on node %d\n",
378 slot = MAX_MEM_SLOTS;
381 memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
382 PFN_PHYS(slot_psize), node);
387 static void __init node_mem_init(cnodeid_t node)
389 unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
390 unsigned long slot_freepfn = node_getfirstfree(node);
391 unsigned long start_pfn, end_pfn;
393 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
396 * Allocate the node data structures on the node first.
398 __node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
399 memset(__node_data[node], 0, PAGE_SIZE);
401 NODE_DATA(node)->node_start_pfn = start_pfn;
402 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
404 cpumask_clear(&hub_data(node)->h_cpus);
406 slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
407 sizeof(struct hub_data));
409 free_bootmem_with_active_regions(node, end_pfn);
411 memblock_reserve(slot_firstpfn << PAGE_SHIFT,
412 ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
414 sparse_memory_present_with_active_regions(node);
418 * A node with nothing. We use it to avoid any special casing in
421 static struct node_data null_node = {
423 .h_cpus = CPU_MASK_NONE
428 * Currently, the intranode memory hole support assumes that each slot
429 * contains at least 32 MBytes of memory. We assume all bootmem data
430 * fits on the first slot.
432 void __init prom_meminit(void)
439 for (node = 0; node < MAX_COMPACT_NODES; node++) {
440 if (node_online(node)) {
444 __node_data[node] = &null_node;
448 void __init prom_free_prom_memory(void)
450 /* We got nothing to free here ... */
453 extern void setup_zero_pages(void);
455 void __init paging_init(void)
457 unsigned long zones_size[MAX_NR_ZONES] = {0, };
462 for_each_online_node(node) {
463 unsigned long start_pfn, end_pfn;
465 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
467 if (end_pfn > max_low_pfn)
468 max_low_pfn = end_pfn;
470 zones_size[ZONE_NORMAL] = max_low_pfn;
471 free_area_init_nodes(zones_size);
474 void __init mem_init(void)
476 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
478 setup_zero_pages(); /* This comes from node 0 */
479 mem_init_print_info(NULL);