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Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
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1 | /* |
2 | * arch/sh/mm/numa.c - Multiple node support for SH machines |
3 | * |
4 | * Copyright (C) 2007 Paul Mundt |
5 | * |
6 | * This file is subject to the terms and conditions of the GNU General Public |
7 | * License. See the file "COPYING" in the main directory of this archive |
8 | * for more details. |
9 | */ |
10 | #include <linux/module.h> |
11 | #include <linux/bootmem.h> |
12 | #include <linux/memblock.h> |
13 | #include <linux/mm.h> |
14 | #include <linux/numa.h> |
15 | #include <linux/pfn.h> |
16 | #include <asm/sections.h> |
17 | |
18 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; |
19 | EXPORT_SYMBOL_GPL(node_data); |
20 | |
21 | /* |
22 | * On SH machines the conventional approach is to stash system RAM |
23 | * in node 0, and other memory blocks in to node 1 and up, ordered by |
24 | * latency. Each node's pgdat is node-local at the beginning of the node, |
25 | * immediately followed by the node mem map. |
26 | */ |
27 | void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) |
28 | { |
29 | unsigned long bootmap_pages; |
30 | unsigned long start_pfn, end_pfn; |
31 | unsigned long bootmem_paddr; |
32 | |
33 | /* Don't allow bogus node assignment */ |
34 | BUG_ON(nid > MAX_NUMNODES || nid <= 0); |
35 | |
36 | start_pfn = start >> PAGE_SHIFT; |
37 | end_pfn = end >> PAGE_SHIFT; |
38 | |
39 | pmb_bolt_mapping((unsigned long)__va(start), start, end - start, |
40 | PAGE_KERNEL); |
41 | |
42 | memblock_add(start, end - start); |
43 | |
44 | __add_active_range(nid, start_pfn, end_pfn); |
45 | |
46 | /* Node-local pgdat */ |
47 | NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data), |
48 | SMP_CACHE_BYTES, end)); |
49 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
50 | |
51 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
52 | NODE_DATA(nid)->node_start_pfn = start_pfn; |
53 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; |
54 | |
55 | /* Node-local bootmap */ |
56 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
57 | bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, |
58 | PAGE_SIZE, end); |
59 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, |
60 | start_pfn, end_pfn); |
61 | |
62 | free_bootmem_with_active_regions(nid, end_pfn); |
63 | |
64 | /* Reserve the pgdat and bootmap space with the bootmem allocator */ |
65 | reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT, |
66 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); |
67 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, |
68 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
69 | |
70 | /* It's up */ |
71 | node_set_online(nid); |
72 | |
73 | /* Kick sparsemem */ |
74 | sparse_memory_present_with_active_regions(nid); |
75 | } |
76 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9