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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> | |
5084f61a | 12 | #include <linux/lmb.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 | */ | |
27 | void __init setup_memory(void) | |
28 | { | |
29 | unsigned long free_pfn = PFN_UP(__pa(_end)); | |
5084f61a | 30 | u64 base = min_low_pfn << PAGE_SHIFT; |
f3a4c00a | 31 | u64 size = (max_low_pfn << PAGE_SHIFT) - base; |
5084f61a MF |
32 | |
33 | lmb_add(base, size); | |
34 | ||
35 | /* Reserve the LMB regions used by the kernel, initrd, etc.. */ | |
36 | lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET, | |
37 | (PFN_PHYS(free_pfn) + PAGE_SIZE - 1) - | |
38 | (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET)); | |
b241cb0c | 39 | |
b25b9758 MD |
40 | /* |
41 | * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET. | |
42 | */ | |
43 | if (CONFIG_ZERO_PAGE_OFFSET != 0) | |
44 | lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET); | |
45 | ||
46 | lmb_analyze(); | |
47 | lmb_dump_all(); | |
48 | ||
b241cb0c PM |
49 | /* |
50 | * Node 0 sets up its pgdat at the first available pfn, | |
51 | * and bumps it up before setting up the bootmem allocator. | |
52 | */ | |
53 | NODE_DATA(0) = pfn_to_kaddr(free_pfn); | |
54 | memset(NODE_DATA(0), 0, sizeof(struct pglist_data)); | |
55 | free_pfn += PFN_UP(sizeof(struct pglist_data)); | |
b61bfa3c | 56 | NODE_DATA(0)->bdata = &bootmem_node_data[0]; |
b241cb0c PM |
57 | |
58 | /* Set up node 0 */ | |
59 | setup_bootmem_allocator(free_pfn); | |
60 | ||
61 | /* Give the platforms a chance to hook up their nodes */ | |
62 | plat_mem_setup(); | |
63 | } | |
64 | ||
65 | void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) | |
66 | { | |
5084f61a MF |
67 | unsigned long bootmap_pages; |
68 | unsigned long start_pfn, end_pfn; | |
69 | unsigned long bootmem_paddr; | |
b241cb0c PM |
70 | |
71 | /* Don't allow bogus node assignment */ | |
90163320 | 72 | BUG_ON(nid > MAX_NUMNODES || nid <= 0); |
b241cb0c | 73 | |
5084f61a | 74 | start_pfn = start >> PAGE_SHIFT; |
b241cb0c PM |
75 | end_pfn = end >> PAGE_SHIFT; |
76 | ||
5084f61a MF |
77 | lmb_add(start, end - start); |
78 | ||
0146ba78 | 79 | __add_active_range(nid, start_pfn, end_pfn); |
b241cb0c PM |
80 | |
81 | /* Node-local pgdat */ | |
5084f61a | 82 | NODE_DATA(nid) = __va(lmb_alloc_base(sizeof(struct pglist_data), |
b25b9758 | 83 | SMP_CACHE_BYTES, end)); |
b241cb0c PM |
84 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
85 | ||
b61bfa3c | 86 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
b241cb0c PM |
87 | NODE_DATA(nid)->node_start_pfn = start_pfn; |
88 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
89 | ||
90 | /* Node-local bootmap */ | |
91 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
5084f61a | 92 | bootmem_paddr = lmb_alloc_base(bootmap_pages << PAGE_SHIFT, |
b25b9758 | 93 | PAGE_SIZE, end); |
5084f61a MF |
94 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, |
95 | start_pfn, end_pfn); | |
b241cb0c PM |
96 | |
97 | free_bootmem_with_active_regions(nid, end_pfn); | |
98 | ||
99 | /* Reserve the pgdat and bootmap space with the bootmem allocator */ | |
100 | reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT, | |
72a7fe39 | 101 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); |
5084f61a | 102 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, |
72a7fe39 | 103 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
b241cb0c PM |
104 | |
105 | /* It's up */ | |
106 | node_set_online(nid); | |
107 | ||
108 | /* Kick sparsemem */ | |
109 | sparse_memory_present_with_active_regions(nid); | |
110 | } |