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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation
3 * August 2002: added remote node KVA remap - Martin J. Bligh
4 *
5 * Copyright (C) 2002, IBM Corp.
6 *
7 * All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
17 * NON INFRINGEMENT. See the GNU General Public License for more
18 * details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/bootmem.h>
Yinghai Lua9ce6bc2010-08-25 13:39:17 -070026#include <linux/memblock.h>
Alexey Dobriyan129f6942005-06-23 00:08:33 -070027#include <linux/module.h>
Eric W. Biederman1bc3b912005-06-25 14:58:01 -070028
Tejun Heobd6709a2011-05-02 17:24:48 +020029#include "numa_internal.h"
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070030
31#ifdef CONFIG_DISCONTIGMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -070032/*
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070033 * 4) physnode_map - the mapping between a pfn and owning node
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 * physnode_map keeps track of the physical memory layout of a generic
Yinghai Luba924c82008-05-31 22:51:51 -070035 * numa node on a 64Mb break (each element of the array will
36 * represent 64Mb of memory and will be marked by the node id. so,
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * if the first gig is on node 0, and the second gig is on node 1
38 * physnode_map will contain:
39 *
Yinghai Luba924c82008-05-31 22:51:51 -070040 * physnode_map[0-15] = 0;
41 * physnode_map[16-31] = 1;
42 * physnode_map[32- ] = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 */
Tejun Heod0ead152011-07-12 09:44:22 +020044s8 physnode_map[MAX_SECTIONS] __read_mostly = { [0 ... (MAX_SECTIONS - 1)] = -1};
Alexey Dobriyan129f6942005-06-23 00:08:33 -070045EXPORT_SYMBOL(physnode_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47void memory_present(int nid, unsigned long start, unsigned long end)
48{
49 unsigned long pfn;
50
Yinghai Luc0943452008-06-23 16:41:30 -070051 printk(KERN_INFO "Node: %d, start_pfn: %lx, end_pfn: %lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 nid, start, end);
53 printk(KERN_DEBUG " Setting physnode_map array to node %d for pfns:\n", nid);
54 printk(KERN_DEBUG " ");
Tejun Heod0ead152011-07-12 09:44:22 +020055 for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
56 physnode_map[pfn / PAGES_PER_SECTION] = nid;
Yinghai Luc0943452008-06-23 16:41:30 -070057 printk(KERN_CONT "%lx ", pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 }
Yinghai Luba924c82008-05-31 22:51:51 -070059 printk(KERN_CONT "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
62unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
63 unsigned long end_pfn)
64{
65 unsigned long nr_pages = end_pfn - start_pfn;
66
67 if (!nr_pages)
68 return 0;
69
70 return (nr_pages + 1) * sizeof(struct page);
71}
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070072#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074extern unsigned long highend_pfn, highstart_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Tejun Heod8fc3af2011-02-16 12:13:06 +010076void __init initmem_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
Tejun Heobd6709a2011-05-02 17:24:48 +020078 x86_numa_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#ifdef CONFIG_HIGHMEM
81 highstart_pfn = highend_pfn = max_pfn;
Yinghai Lu2ec65f82008-06-23 03:05:30 -070082 if (max_pfn > max_low_pfn)
83 highstart_pfn = max_low_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
85 pages_to_mb(highend_pfn - highstart_pfn));
Jan Beulichba9c2312006-09-26 10:52:31 +020086 high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
87#else
Yinghai Lu2ec65f82008-06-23 03:05:30 -070088 high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089#endif
90 printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
Yinghai Lu2ec65f82008-06-23 03:05:30 -070091 pages_to_mb(max_low_pfn));
Yinghai Luc0943452008-06-23 16:41:30 -070092 printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n",
93 max_low_pfn, highstart_pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Yinghai Luc0943452008-06-23 16:41:30 -070095 printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 (ulong) pfn_to_kaddr(max_low_pfn));
Yinghai Lu3a58a2a62008-06-24 12:19:41 -070097
Yinghai Luc0943452008-06-23 16:41:30 -070098 printk(KERN_DEBUG "High memory starts at vaddr %08lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 (ulong) pfn_to_kaddr(highstart_pfn));
Yinghai Lu3a58a2a62008-06-24 12:19:41 -0700100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 setup_bootmem_allocator();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}