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
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
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>
26 #include <asm/sgialib.h>
28 #include <asm/sn/arch.h>
29 #include <asm/sn/agent.h>
30 #include <asm/sn/klconfig.h>
32 #include "ip27-common.h"
34 #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT)
35 #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT)
37 struct node_data *__node_data[MAX_NUMNODES];
39 EXPORT_SYMBOL(__node_data);
41 static u64 gen_region_mask(void)
47 region_shift = get_region_shift();
49 for_each_online_node(nasid)
50 region_mask |= BIT_ULL(nasid >> region_shift);
55 #define rou_rflag rou_flags
57 static int router_distance;
59 static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth)
65 if (router_a->rou_rflag == 1)
68 if (depth >= router_distance)
71 router_a->rou_rflag = 1;
73 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
74 if (router_a->rou_port[port].port_nasid == INVALID_NASID)
77 brd = (lboard_t *)NODE_OFFSET_TO_K0(
78 router_a->rou_port[port].port_nasid,
79 router_a->rou_port[port].port_offset);
81 if (brd->brd_type == KLTYPE_ROUTER) {
82 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
83 if (router == router_b) {
84 if (depth < router_distance)
85 router_distance = depth;
88 router_recurse(router, router_b, depth + 1);
92 router_a->rou_rflag = 0;
95 unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
96 EXPORT_SYMBOL(__node_distances);
98 static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
100 klrou_t *router, *router_a = NULL, *router_b = NULL;
101 lboard_t *brd, *dest_brd;
105 /* Figure out which routers nodes in question are connected to */
106 for_each_online_node(nasid) {
107 brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
114 if (brd->brd_flags & DUPLICATE_BOARD)
117 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
118 router->rou_rflag = 0;
120 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
121 if (router->rou_port[port].port_nasid == INVALID_NASID)
124 dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
125 router->rou_port[port].port_nasid,
126 router->rou_port[port].port_offset);
128 if (dest_brd->brd_type == KLTYPE_IP27) {
129 if (dest_brd->brd_nasid == nasid_a)
131 if (dest_brd->brd_nasid == nasid_b)
136 } while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
139 if (nasid_a == nasid_b)
140 return LOCAL_DISTANCE;
142 if (router_a == router_b)
143 return LOCAL_DISTANCE + 1;
145 if (router_a == NULL) {
146 pr_info("node_distance: router_a NULL\n");
149 if (router_b == NULL) {
150 pr_info("node_distance: router_b NULL\n");
154 router_distance = 100;
155 router_recurse(router_a, router_b, 2);
157 return LOCAL_DISTANCE + router_distance;
160 static void __init init_topology_matrix(void)
164 for (row = 0; row < MAX_NUMNODES; row++)
165 for (col = 0; col < MAX_NUMNODES; col++)
166 __node_distances[row][col] = -1;
168 for_each_online_node(row) {
169 for_each_online_node(col) {
170 __node_distances[row][col] =
171 compute_node_distance(row, col);
176 static void __init dump_topology(void)
179 lboard_t *brd, *dest_brd;
185 pr_info("************** Topology ********************\n");
188 for_each_online_node(col)
189 pr_cont("%02d ", col);
191 for_each_online_node(row) {
192 pr_info("%02d ", row);
193 for_each_online_node(col)
194 pr_cont("%2d ", node_distance(row, col));
198 for_each_online_node(nasid) {
199 brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
206 if (brd->brd_flags & DUPLICATE_BOARD)
208 pr_cont("Router %d:", router_num);
211 router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
213 for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
214 if (router->rou_port[port].port_nasid == INVALID_NASID)
217 dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
218 router->rou_port[port].port_nasid,
219 router->rou_port[port].port_offset);
221 if (dest_brd->brd_type == KLTYPE_IP27)
222 pr_cont(" %d", dest_brd->brd_nasid);
223 if (dest_brd->brd_type == KLTYPE_ROUTER)
228 } while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
232 static unsigned long __init slot_getbasepfn(nasid_t nasid, int slot)
234 return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
237 static unsigned long __init slot_psize_compute(nasid_t nasid, int slot)
243 /* Find the node board */
244 brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
248 /* Get the memory bank structure */
249 banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
253 /* Size in _Megabytes_ */
254 size = (unsigned long)banks->membnk_bnksz[slot/4];
256 /* hack for 128 dimm banks */
259 size <<= 20; /* size in bytes */
260 return size >> PAGE_SHIFT;
266 return size >> PAGE_SHIFT;
270 static void __init mlreset(void)
275 master_nasid = get_nasid();
278 * Probe for all CPUs - this creates the cpumask and sets up the
279 * mapping tables. We need to do this as early as possible.
285 init_topology_matrix();
288 region_mask = gen_region_mask();
290 setup_replication_mask();
293 * Set all nodes' calias sizes to 8k
295 for_each_online_node(nasid) {
297 * Always have node 0 in the region mask, otherwise
298 * CALIAS accesses get exceptions since the hub
299 * thinks it is a node 0 address.
301 REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1));
302 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
306 * Set up all hubs to have a big window pointing at
307 * widget 0. Memory mode, widget 0, offset 0
309 REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN),
310 ((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) |
311 (0 << IIO_ITTE_WIDGET_SHIFT)));
316 static void __init szmem(void)
318 unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
322 for_each_online_node(node) {
324 for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
325 slot_psize = slot_psize_compute(node, slot);
327 slot0sz = slot_psize;
329 * We need to refine the hack when we have replicated
332 nodebytes += (1LL << SLOT_SHIFT);
337 if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
338 (slot0sz << PAGE_SHIFT)) {
339 pr_info("Ignoring slot %d onwards on node %d\n",
341 slot = MAX_MEM_SLOTS;
344 memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
345 PFN_PHYS(slot_psize), node,
351 static void __init node_mem_init(nasid_t node)
353 unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
354 unsigned long slot_freepfn = node_getfirstfree(node);
355 unsigned long start_pfn, end_pfn;
357 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
360 * Allocate the node data structures on the node first.
362 __node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
363 memset(__node_data[node], 0, PAGE_SIZE);
365 NODE_DATA(node)->node_start_pfn = start_pfn;
366 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
368 cpumask_clear(&hub_data(node)->h_cpus);
370 slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
371 sizeof(struct hub_data));
373 memblock_reserve(slot_firstpfn << PAGE_SHIFT,
374 ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
378 * A node with nothing. We use it to avoid any special casing in
381 static struct node_data null_node = {
383 .h_cpus = CPU_MASK_NONE
388 * Currently, the intranode memory hole support assumes that each slot
389 * contains at least 32 MBytes of memory. We assume all bootmem data
390 * fits on the first slot.
392 void __init prom_meminit(void)
398 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
400 for (node = 0; node < MAX_NUMNODES; node++) {
401 if (node_online(node)) {
405 __node_data[node] = &null_node;
409 extern void setup_zero_pages(void);
411 void __init paging_init(void)
413 unsigned long zones_size[MAX_NR_ZONES] = {0, };
416 zones_size[ZONE_NORMAL] = max_low_pfn;
417 free_area_init(zones_size);
420 void __init mem_init(void)
422 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
424 setup_zero_pages(); /* This comes from node 0 */
427 pg_data_t * __init arch_alloc_nodedata(int nid)
429 return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES);
432 void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
434 __node_data[nid] = (struct node_data *)pgdat;