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c438b58e JH |
1 | /* |
2 | * Multiple memory node support for Meta machines | |
3 | * | |
4 | * Copyright (C) 2007 Paul Mundt | |
5 | * Copyright (C) 2010 Imagination Technologies Ltd. | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License. See the file "COPYING" in the main directory of this archive | |
9 | * for more details. | |
10 | */ | |
11 | #include <linux/export.h> | |
12 | #include <linux/bootmem.h> | |
13 | #include <linux/memblock.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/numa.h> | |
16 | #include <linux/pfn.h> | |
17 | #include <asm/sections.h> | |
18 | ||
19 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; | |
20 | EXPORT_SYMBOL_GPL(node_data); | |
21 | ||
22 | extern char _heap_start[]; | |
23 | ||
24 | /* | |
25 | * On Meta machines the conventional approach is to stash system RAM | |
26 | * in node 0, and other memory blocks in to node 1 and up, ordered by | |
27 | * latency. Each node's pgdat is node-local at the beginning of the node, | |
28 | * immediately followed by the node mem map. | |
29 | */ | |
30 | void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) | |
31 | { | |
32 | unsigned long bootmap_pages, bootmem_paddr; | |
33 | unsigned long start_pfn, end_pfn; | |
34 | unsigned long pgdat_paddr; | |
35 | ||
36 | /* Don't allow bogus node assignment */ | |
37 | BUG_ON(nid > MAX_NUMNODES || nid <= 0); | |
38 | ||
39 | start_pfn = start >> PAGE_SHIFT; | |
40 | end_pfn = end >> PAGE_SHIFT; | |
41 | ||
42 | memblock_add(start, end - start); | |
43 | ||
44 | memblock_set_node(PFN_PHYS(start_pfn), | |
45 | PFN_PHYS(end_pfn - start_pfn), nid); | |
46 | ||
47 | /* Node-local pgdat */ | |
48 | pgdat_paddr = memblock_alloc_base(sizeof(struct pglist_data), | |
49 | SMP_CACHE_BYTES, end); | |
50 | NODE_DATA(nid) = __va(pgdat_paddr); | |
51 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
52 | ||
53 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; | |
54 | NODE_DATA(nid)->node_start_pfn = start_pfn; | |
55 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
56 | ||
57 | /* Node-local bootmap */ | |
58 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
59 | bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, | |
60 | PAGE_SIZE, end); | |
61 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, | |
62 | start_pfn, end_pfn); | |
63 | ||
64 | free_bootmem_with_active_regions(nid, end_pfn); | |
65 | ||
66 | /* Reserve the pgdat and bootmap space with the bootmem allocator */ | |
67 | reserve_bootmem_node(NODE_DATA(nid), pgdat_paddr & PAGE_MASK, | |
68 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); | |
69 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, | |
70 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); | |
71 | ||
72 | /* It's up */ | |
73 | node_set_online(nid); | |
74 | ||
75 | /* Kick sparsemem */ | |
76 | sparse_memory_present_with_active_regions(nid); | |
77 | } | |
78 | ||
79 | void __init __weak soc_mem_setup(void) | |
80 | { | |
81 | } |