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b241cb0c PM |
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> | |
95f72d1e | 12 | #include <linux/memblock.h> |
b241cb0c PM |
13 | #include <linux/mm.h> |
14 | #include <linux/numa.h> | |
15 | #include <linux/pfn.h> | |
16 | #include <asm/sections.h> | |
17 | ||
b241cb0c PM |
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 | */ | |
b241cb0c PM |
27 | void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) |
28 | { | |
5084f61a MF |
29 | unsigned long bootmap_pages; |
30 | unsigned long start_pfn, end_pfn; | |
31 | unsigned long bootmem_paddr; | |
b241cb0c PM |
32 | |
33 | /* Don't allow bogus node assignment */ | |
ded00142 | 34 | BUG_ON(nid >= MAX_NUMNODES || nid <= 0); |
b241cb0c | 35 | |
81cf09ed AK |
36 | start_pfn = PFN_DOWN(start); |
37 | end_pfn = PFN_DOWN(end); | |
b241cb0c | 38 | |
09e11723 PM |
39 | pmb_bolt_mapping((unsigned long)__va(start), start, end - start, |
40 | PAGE_KERNEL); | |
41 | ||
95f72d1e | 42 | memblock_add(start, end - start); |
5084f61a | 43 | |
0146ba78 | 44 | __add_active_range(nid, start_pfn, end_pfn); |
b241cb0c PM |
45 | |
46 | /* Node-local pgdat */ | |
95f72d1e | 47 | NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data), |
b25b9758 | 48 | SMP_CACHE_BYTES, end)); |
b241cb0c PM |
49 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
50 | ||
b61bfa3c | 51 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
b241cb0c PM |
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); | |
95f72d1e | 57 | bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, |
b25b9758 | 58 | PAGE_SIZE, end); |
5084f61a MF |
59 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, |
60 | start_pfn, end_pfn); | |
b241cb0c PM |
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, | |
72a7fe39 | 66 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); |
5084f61a | 67 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, |
72a7fe39 | 68 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
b241cb0c PM |
69 | |
70 | /* It's up */ | |
71 | node_set_online(nid); | |
72 | ||
73 | /* Kick sparsemem */ | |
74 | sparse_memory_present_with_active_regions(nid); | |
75 | } |