Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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 | ||
1da177e4 | 25 | #include <linux/bootmem.h> |
a9ce6bc1 | 26 | #include <linux/memblock.h> |
129f6946 | 27 | #include <linux/module.h> |
05b79bdc | 28 | |
bd6709a9 | 29 | #include "numa_internal.h" |
1da177e4 | 30 | |
05b79bdc | 31 | #ifdef CONFIG_DISCONTIGMEM |
1da177e4 | 32 | /* |
05b79bdc | 33 | * 4) physnode_map - the mapping between a pfn and owning node |
1da177e4 | 34 | * physnode_map keeps track of the physical memory layout of a generic |
ba924c81 YL |
35 | * 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, | |
1da177e4 LT |
37 | * if the first gig is on node 0, and the second gig is on node 1 |
38 | * physnode_map will contain: | |
39 | * | |
ba924c81 YL |
40 | * physnode_map[0-15] = 0; |
41 | * physnode_map[16-31] = 1; | |
42 | * physnode_map[32- ] = -1; | |
1da177e4 | 43 | */ |
d0ead157 | 44 | s8 physnode_map[MAX_SECTIONS] __read_mostly = { [0 ... (MAX_SECTIONS - 1)] = -1}; |
129f6946 | 45 | EXPORT_SYMBOL(physnode_map); |
1da177e4 LT |
46 | |
47 | void memory_present(int nid, unsigned long start, unsigned long end) | |
48 | { | |
49 | unsigned long pfn; | |
50 | ||
c0943457 | 51 | printk(KERN_INFO "Node: %d, start_pfn: %lx, end_pfn: %lx\n", |
1da177e4 LT |
52 | nid, start, end); |
53 | printk(KERN_DEBUG " Setting physnode_map array to node %d for pfns:\n", nid); | |
54 | printk(KERN_DEBUG " "); | |
85fc73a2 PT |
55 | start = round_down(start, PAGES_PER_SECTION); |
56 | end = round_up(end, PAGES_PER_SECTION); | |
d0ead157 TH |
57 | for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) { |
58 | physnode_map[pfn / PAGES_PER_SECTION] = nid; | |
c0943457 | 59 | printk(KERN_CONT "%lx ", pfn); |
1da177e4 | 60 | } |
ba924c81 | 61 | printk(KERN_CONT "\n"); |
1da177e4 LT |
62 | } |
63 | ||
64 | unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn, | |
65 | unsigned long end_pfn) | |
66 | { | |
67 | unsigned long nr_pages = end_pfn - start_pfn; | |
68 | ||
69 | if (!nr_pages) | |
70 | return 0; | |
71 | ||
72 | return (nr_pages + 1) * sizeof(struct page); | |
73 | } | |
05b79bdc | 74 | #endif |
1da177e4 | 75 | |
1da177e4 | 76 | extern unsigned long highend_pfn, highstart_pfn; |
1da177e4 | 77 | |
d8fc3afc | 78 | void __init initmem_init(void) |
1da177e4 | 79 | { |
bd6709a9 | 80 | x86_numa_init(); |
0e9f93c1 | 81 | |
1da177e4 LT |
82 | #ifdef CONFIG_HIGHMEM |
83 | highstart_pfn = highend_pfn = max_pfn; | |
2ec65f8b YL |
84 | if (max_pfn > max_low_pfn) |
85 | highstart_pfn = max_low_pfn; | |
1da177e4 LT |
86 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", |
87 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
88 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; |
89 | #else | |
2ec65f8b | 90 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; |
1da177e4 LT |
91 | #endif |
92 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
2ec65f8b | 93 | pages_to_mb(max_low_pfn)); |
c0943457 YL |
94 | printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n", |
95 | max_low_pfn, highstart_pfn); | |
1da177e4 | 96 | |
c0943457 | 97 | printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n", |
1da177e4 | 98 | (ulong) pfn_to_kaddr(max_low_pfn)); |
3a58a2a6 | 99 | |
c0943457 | 100 | printk(KERN_DEBUG "High memory starts at vaddr %08lx\n", |
1da177e4 | 101 | (ulong) pfn_to_kaddr(highstart_pfn)); |
3a58a2a6 | 102 | |
1da177e4 | 103 | setup_bootmem_allocator(); |
1da177e4 | 104 | } |