11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public 31da177e4SLinus Torvalds * License. See the file "COPYING" in the main directory of this archive 41da177e4SLinus Torvalds * for more details. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (C) 2000, 05 by Ralf Baechle (ralf@linux-mips.org) 71da177e4SLinus Torvalds * Copyright (C) 2000 by Silicon Graphics, Inc. 81da177e4SLinus Torvalds * Copyright (C) 2004 by Christoph Hellwig 91da177e4SLinus Torvalds * 1092a76f6dSAdam Buchbinder * On SGI IP27 the ARC memory configuration data is completely bogus but 111da177e4SLinus Torvalds * alternate easier to use mechanisms are available. 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds #include <linux/init.h> 141da177e4SLinus Torvalds #include <linux/kernel.h> 159d15ffc8STejun Heo #include <linux/memblock.h> 161da177e4SLinus Torvalds #include <linux/mm.h> 171da177e4SLinus Torvalds #include <linux/mmzone.h> 1826dd3e4fSPaul Gortmaker #include <linux/export.h> 191da177e4SLinus Torvalds #include <linux/nodemask.h> 201da177e4SLinus Torvalds #include <linux/swap.h> 2122a9835cSDave Hansen #include <linux/pfn.h> 22c1f60a5aSChristoph Lameter #include <linux/highmem.h> 231da177e4SLinus Torvalds #include <asm/page.h> 246a1e5529SAtsushi Nemoto #include <asm/pgalloc.h> 251da177e4SLinus Torvalds #include <asm/sections.h> 26f134bd1eSThomas Bogendoerfer #include <asm/sgialib.h> 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include <asm/sn/arch.h> 29524c4e1fSThomas Bogendoerfer #include <asm/sn/agent.h> 301da177e4SLinus Torvalds #include <asm/sn/klconfig.h> 311da177e4SLinus Torvalds 329d0aaf98SThomas Bogendoerfer #include "ip27-common.h" 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT) 351da177e4SLinus Torvalds #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT) 361da177e4SLinus Torvalds 37*bc5c8ad3SMike Rapoport (Microsoft) struct node_data *__node_data[MAX_NUMNODES]; 381da177e4SLinus Torvalds EXPORT_SYMBOL(__node_data); 391da177e4SLinus Torvalds 40524c4e1fSThomas Bogendoerfer static u64 gen_region_mask(void) 411da177e4SLinus Torvalds { 42524c4e1fSThomas Bogendoerfer int region_shift; 43524c4e1fSThomas Bogendoerfer u64 region_mask; 444bf841ebSThomas Bogendoerfer nasid_t nasid; 451da177e4SLinus Torvalds 46524c4e1fSThomas Bogendoerfer region_shift = get_region_shift(); 47524c4e1fSThomas Bogendoerfer region_mask = 0; 48524c4e1fSThomas Bogendoerfer for_each_online_node(nasid) 49524c4e1fSThomas Bogendoerfer region_mask |= BIT_ULL(nasid >> region_shift); 50524c4e1fSThomas Bogendoerfer 51524c4e1fSThomas Bogendoerfer return region_mask; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds #define rou_rflag rou_flags 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static int router_distance; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds klrou_t *router; 611da177e4SLinus Torvalds lboard_t *brd; 621da177e4SLinus Torvalds int port; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds if (router_a->rou_rflag == 1) 651da177e4SLinus Torvalds return; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds if (depth >= router_distance) 681da177e4SLinus Torvalds return; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds router_a->rou_rflag = 1; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds for (port = 1; port <= MAX_ROUTER_PORTS; port++) { 731da177e4SLinus Torvalds if (router_a->rou_port[port].port_nasid == INVALID_NASID) 741da177e4SLinus Torvalds continue; 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds brd = (lboard_t *)NODE_OFFSET_TO_K0( 771da177e4SLinus Torvalds router_a->rou_port[port].port_nasid, 781da177e4SLinus Torvalds router_a->rou_port[port].port_offset); 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds if (brd->brd_type == KLTYPE_ROUTER) { 811da177e4SLinus Torvalds router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); 821da177e4SLinus Torvalds if (router == router_b) { 831da177e4SLinus Torvalds if (depth < router_distance) 841da177e4SLinus Torvalds router_distance = depth; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds else 871da177e4SLinus Torvalds router_recurse(router, router_b, depth + 1); 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds router_a->rou_rflag = 0; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds 94c80b4896SThomas Bogendoerfer unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; 955829b0ecSJames Cowgill EXPORT_SYMBOL(__node_distances); 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds klrou_t *router, *router_a = NULL, *router_b = NULL; 1001da177e4SLinus Torvalds lboard_t *brd, *dest_brd; 1011da177e4SLinus Torvalds nasid_t nasid; 1021da177e4SLinus Torvalds int port; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds /* Figure out which routers nodes in question are connected to */ 1054bf841ebSThomas Bogendoerfer for_each_online_node(nasid) { 1061da177e4SLinus Torvalds brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), 1071da177e4SLinus Torvalds KLTYPE_ROUTER); 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds if (!brd) 1101da177e4SLinus Torvalds continue; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds do { 1131da177e4SLinus Torvalds if (brd->brd_flags & DUPLICATE_BOARD) 1141da177e4SLinus Torvalds continue; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); 1171da177e4SLinus Torvalds router->rou_rflag = 0; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds for (port = 1; port <= MAX_ROUTER_PORTS; port++) { 1201da177e4SLinus Torvalds if (router->rou_port[port].port_nasid == INVALID_NASID) 1211da177e4SLinus Torvalds continue; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( 1241da177e4SLinus Torvalds router->rou_port[port].port_nasid, 1251da177e4SLinus Torvalds router->rou_port[port].port_offset); 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds if (dest_brd->brd_type == KLTYPE_IP27) { 1281da177e4SLinus Torvalds if (dest_brd->brd_nasid == nasid_a) 1291da177e4SLinus Torvalds router_a = router; 1301da177e4SLinus Torvalds if (dest_brd->brd_nasid == nasid_b) 1311da177e4SLinus Torvalds router_b = router; 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds } while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER))); 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds 138a20ebc04SThomas Bogendoerfer if (nasid_a == nasid_b) 139a20ebc04SThomas Bogendoerfer return LOCAL_DISTANCE; 140a20ebc04SThomas Bogendoerfer 141a20ebc04SThomas Bogendoerfer if (router_a == router_b) 142a20ebc04SThomas Bogendoerfer return LOCAL_DISTANCE + 1; 143a20ebc04SThomas Bogendoerfer 1441da177e4SLinus Torvalds if (router_a == NULL) { 145ab68280eSThomas Bogendoerfer pr_info("node_distance: router_a NULL\n"); 146a20ebc04SThomas Bogendoerfer return 255; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds if (router_b == NULL) { 149ab68280eSThomas Bogendoerfer pr_info("node_distance: router_b NULL\n"); 150a20ebc04SThomas Bogendoerfer return 255; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds router_distance = 100; 1541da177e4SLinus Torvalds router_recurse(router_a, router_b, 2); 1551da177e4SLinus Torvalds 156a20ebc04SThomas Bogendoerfer return LOCAL_DISTANCE + router_distance; 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds static void __init init_topology_matrix(void) 1601da177e4SLinus Torvalds { 1614bf841ebSThomas Bogendoerfer nasid_t row, col; 1621da177e4SLinus Torvalds 163c80b4896SThomas Bogendoerfer for (row = 0; row < MAX_NUMNODES; row++) 164c80b4896SThomas Bogendoerfer for (col = 0; col < MAX_NUMNODES; col++) 1651da177e4SLinus Torvalds __node_distances[row][col] = -1; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds for_each_online_node(row) { 1681da177e4SLinus Torvalds for_each_online_node(col) { 1691da177e4SLinus Torvalds __node_distances[row][col] = 1704bf841ebSThomas Bogendoerfer compute_node_distance(row, col); 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static void __init dump_topology(void) 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds nasid_t nasid; 1781da177e4SLinus Torvalds lboard_t *brd, *dest_brd; 1791da177e4SLinus Torvalds int port; 1801da177e4SLinus Torvalds int router_num = 0; 1811da177e4SLinus Torvalds klrou_t *router; 1824bf841ebSThomas Bogendoerfer nasid_t row, col; 1831da177e4SLinus Torvalds 184ab68280eSThomas Bogendoerfer pr_info("************** Topology ********************\n"); 1851da177e4SLinus Torvalds 186ab68280eSThomas Bogendoerfer pr_info(" "); 1871da177e4SLinus Torvalds for_each_online_node(col) 188ab68280eSThomas Bogendoerfer pr_cont("%02d ", col); 189ab68280eSThomas Bogendoerfer pr_cont("\n"); 1901da177e4SLinus Torvalds for_each_online_node(row) { 191ab68280eSThomas Bogendoerfer pr_info("%02d ", row); 1921da177e4SLinus Torvalds for_each_online_node(col) 193ab68280eSThomas Bogendoerfer pr_cont("%2d ", node_distance(row, col)); 194ab68280eSThomas Bogendoerfer pr_cont("\n"); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1974bf841ebSThomas Bogendoerfer for_each_online_node(nasid) { 1981da177e4SLinus Torvalds brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid), 1991da177e4SLinus Torvalds KLTYPE_ROUTER); 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds if (!brd) 2021da177e4SLinus Torvalds continue; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds do { 2051da177e4SLinus Torvalds if (brd->brd_flags & DUPLICATE_BOARD) 2061da177e4SLinus Torvalds continue; 207ab68280eSThomas Bogendoerfer pr_cont("Router %d:", router_num); 2081da177e4SLinus Torvalds router_num++; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]); 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds for (port = 1; port <= MAX_ROUTER_PORTS; port++) { 2131da177e4SLinus Torvalds if (router->rou_port[port].port_nasid == INVALID_NASID) 2141da177e4SLinus Torvalds continue; 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds dest_brd = (lboard_t *)NODE_OFFSET_TO_K0( 2171da177e4SLinus Torvalds router->rou_port[port].port_nasid, 2181da177e4SLinus Torvalds router->rou_port[port].port_offset); 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds if (dest_brd->brd_type == KLTYPE_IP27) 221ab68280eSThomas Bogendoerfer pr_cont(" %d", dest_brd->brd_nasid); 2221da177e4SLinus Torvalds if (dest_brd->brd_type == KLTYPE_ROUTER) 223ab68280eSThomas Bogendoerfer pr_cont(" r"); 2241da177e4SLinus Torvalds } 225ab68280eSThomas Bogendoerfer pr_cont("\n"); 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds } while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) ); 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2314bf841ebSThomas Bogendoerfer static unsigned long __init slot_getbasepfn(nasid_t nasid, int slot) 2321da177e4SLinus Torvalds { 233fc0460d0SRalf Baechle return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT); 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2364bf841ebSThomas Bogendoerfer static unsigned long __init slot_psize_compute(nasid_t nasid, int slot) 2371da177e4SLinus Torvalds { 2381da177e4SLinus Torvalds lboard_t *brd; 2391da177e4SLinus Torvalds klmembnk_t *banks; 2401da177e4SLinus Torvalds unsigned long size; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* Find the node board */ 2431da177e4SLinus Torvalds brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27); 2441da177e4SLinus Torvalds if (!brd) 2451da177e4SLinus Torvalds return 0; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds /* Get the memory bank structure */ 2481da177e4SLinus Torvalds banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK); 2491da177e4SLinus Torvalds if (!banks) 2501da177e4SLinus Torvalds return 0; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds /* Size in _Megabytes_ */ 2531da177e4SLinus Torvalds size = (unsigned long)banks->membnk_bnksz[slot/4]; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds /* hack for 128 dimm banks */ 2561da177e4SLinus Torvalds if (size <= 128) { 2571da177e4SLinus Torvalds if (slot % 4 == 0) { 2581da177e4SLinus Torvalds size <<= 20; /* size in bytes */ 259635c9907SRalf Baechle return size >> PAGE_SHIFT; 2601da177e4SLinus Torvalds } else 2611da177e4SLinus Torvalds return 0; 2621da177e4SLinus Torvalds } else { 2631da177e4SLinus Torvalds size /= 4; 2641da177e4SLinus Torvalds size <<= 20; 2651da177e4SLinus Torvalds return size >> PAGE_SHIFT; 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds static void __init mlreset(void) 2701da177e4SLinus Torvalds { 271524c4e1fSThomas Bogendoerfer u64 region_mask; 2724bf841ebSThomas Bogendoerfer nasid_t nasid; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds master_nasid = get_nasid(); 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * Probe for all CPUs - this creates the cpumask and sets up the 2781da177e4SLinus Torvalds * mapping tables. We need to do this as early as possible. 2791da177e4SLinus Torvalds */ 2801da177e4SLinus Torvalds #ifdef CONFIG_SMP 2811da177e4SLinus Torvalds cpu_node_probe(); 2821da177e4SLinus Torvalds #endif 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds init_topology_matrix(); 2851da177e4SLinus Torvalds dump_topology(); 2861da177e4SLinus Torvalds 287524c4e1fSThomas Bogendoerfer region_mask = gen_region_mask(); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds setup_replication_mask(); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* 2921da177e4SLinus Torvalds * Set all nodes' calias sizes to 8k 2931da177e4SLinus Torvalds */ 2944bf841ebSThomas Bogendoerfer for_each_online_node(nasid) { 2951da177e4SLinus Torvalds /* 2961da177e4SLinus Torvalds * Always have node 0 in the region mask, otherwise 2971da177e4SLinus Torvalds * CALIAS accesses get exceptions since the hub 2981da177e4SLinus Torvalds * thinks it is a node 0 address. 2991da177e4SLinus Torvalds */ 3001da177e4SLinus Torvalds REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1)); 3011da177e4SLinus Torvalds REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds #ifdef LATER 3041da177e4SLinus Torvalds /* 3051da177e4SLinus Torvalds * Set up all hubs to have a big window pointing at 3061da177e4SLinus Torvalds * widget 0. Memory mode, widget 0, offset 0 3071da177e4SLinus Torvalds */ 3081da177e4SLinus Torvalds REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN), 3091da177e4SLinus Torvalds ((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) | 3101da177e4SLinus Torvalds (0 << IIO_ITTE_WIDGET_SHIFT))); 3111da177e4SLinus Torvalds #endif 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds static void __init szmem(void) 3161da177e4SLinus Torvalds { 317fc0460d0SRalf Baechle unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */ 3182bf8ec2dSThomas Bogendoerfer int slot; 3194bf841ebSThomas Bogendoerfer nasid_t node; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds for_each_online_node(node) { 3222bf8ec2dSThomas Bogendoerfer nodebytes = 0; 3231da177e4SLinus Torvalds for (slot = 0; slot < MAX_MEM_SLOTS; slot++) { 3241da177e4SLinus Torvalds slot_psize = slot_psize_compute(node, slot); 3251da177e4SLinus Torvalds if (slot == 0) 3261da177e4SLinus Torvalds slot0sz = slot_psize; 3271da177e4SLinus Torvalds /* 3281da177e4SLinus Torvalds * We need to refine the hack when we have replicated 3291da177e4SLinus Torvalds * kernel text. 3301da177e4SLinus Torvalds */ 3311da177e4SLinus Torvalds nodebytes += (1LL << SLOT_SHIFT); 3322bf8ec2dSThomas Bogendoerfer 3332bf8ec2dSThomas Bogendoerfer if (!slot_psize) 3342bf8ec2dSThomas Bogendoerfer continue; 3352bf8ec2dSThomas Bogendoerfer 3361da177e4SLinus Torvalds if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) > 3372bf8ec2dSThomas Bogendoerfer (slot0sz << PAGE_SHIFT)) { 338ab68280eSThomas Bogendoerfer pr_info("Ignoring slot %d onwards on node %d\n", 3391da177e4SLinus Torvalds slot, node); 3401da177e4SLinus Torvalds slot = MAX_MEM_SLOTS; 3411da177e4SLinus Torvalds continue; 3421da177e4SLinus Torvalds } 3439d15ffc8STejun Heo memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)), 344952eea9bSDavid Hildenbrand PFN_PHYS(slot_psize), node, 345952eea9bSDavid Hildenbrand MEMBLOCK_NONE); 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3504bf841ebSThomas Bogendoerfer static void __init node_mem_init(nasid_t node) 3511da177e4SLinus Torvalds { 352fc0460d0SRalf Baechle unsigned long slot_firstpfn = slot_getbasepfn(node, 0); 353fc0460d0SRalf Baechle unsigned long slot_freepfn = node_getfirstfree(node); 354fc0460d0SRalf Baechle unsigned long start_pfn, end_pfn; 3552bf8ec2dSThomas Bogendoerfer 3562bf8ec2dSThomas Bogendoerfer get_pfn_range_for_nid(node, &start_pfn, &end_pfn); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds /* 3591da177e4SLinus Torvalds * Allocate the node data structures on the node first. 3601da177e4SLinus Torvalds */ 3611da177e4SLinus Torvalds __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); 36293180cecSMinchan Kim memset(__node_data[node], 0, PAGE_SIZE); 363*bc5c8ad3SMike Rapoport (Microsoft) node_data[node] = &__node_data[node]->pglist; 3641da177e4SLinus Torvalds 3652bf8ec2dSThomas Bogendoerfer NODE_DATA(node)->node_start_pfn = start_pfn; 3662bf8ec2dSThomas Bogendoerfer NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; 3671da177e4SLinus Torvalds 3688dd92891SRusty Russell cpumask_clear(&hub_data(node)->h_cpus); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds slot_freepfn += PFN_UP(sizeof(struct pglist_data) + 3711da177e4SLinus Torvalds sizeof(struct hub_data)); 3721da177e4SLinus Torvalds 373bcec54bfSMike Rapoport memblock_reserve(slot_firstpfn << PAGE_SHIFT, 374bcec54bfSMike Rapoport ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT)); 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds /* 3781da177e4SLinus Torvalds * A node with nothing. We use it to avoid any special casing in 37929c337a0SRusty Russell * cpumask_of_node 3801da177e4SLinus Torvalds */ 3811da177e4SLinus Torvalds static struct node_data null_node = { 3821da177e4SLinus Torvalds .hub = { 3831da177e4SLinus Torvalds .h_cpus = CPU_MASK_NONE 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds }; 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* 3881da177e4SLinus Torvalds * Currently, the intranode memory hole support assumes that each slot 3891da177e4SLinus Torvalds * contains at least 32 MBytes of memory. We assume all bootmem data 3901da177e4SLinus Torvalds * fits on the first slot. 3911da177e4SLinus Torvalds */ 3921da177e4SLinus Torvalds void __init prom_meminit(void) 3931da177e4SLinus Torvalds { 3944bf841ebSThomas Bogendoerfer nasid_t node; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds mlreset(); 3971da177e4SLinus Torvalds szmem(); 3981229ace4SPaul Burton max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); 3991da177e4SLinus Torvalds 400c80b4896SThomas Bogendoerfer for (node = 0; node < MAX_NUMNODES; node++) { 4011da177e4SLinus Torvalds if (node_online(node)) { 4021da177e4SLinus Torvalds node_mem_init(node); 4031da177e4SLinus Torvalds continue; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds __node_data[node] = &null_node; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 40931605922SJiang Liu extern void setup_zero_pages(void); 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds void __init paging_init(void) 4121da177e4SLinus Torvalds { 413f06a9684SChristoph Lameter unsigned long zones_size[MAX_NR_ZONES] = {0, }; 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds pagetable_init(); 4162bf8ec2dSThomas Bogendoerfer zones_size[ZONE_NORMAL] = max_low_pfn; 4179691a071SMike Rapoport free_area_init(zones_size); 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds void __init mem_init(void) 4211da177e4SLinus Torvalds { 4221132137eSJiang Liu high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); 423c6ffc5caSMike Rapoport memblock_free_all(); 42431605922SJiang Liu setup_zero_pages(); /* This comes from node 0 */ 4251da177e4SLinus Torvalds } 426