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1da177e4 LT |
1 | /* |
2 | * linux/arch/m32r/mm/discontig.c | |
3 | * | |
4 | * Discontig memory support | |
5 | * | |
6 | * Copyright (c) 2003 Hitoshi Yamamoto | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/mm.h> |
10 | #include <linux/bootmem.h> | |
11 | #include <linux/mmzone.h> | |
12 | #include <linux/initrd.h> | |
13 | #include <linux/nodemask.h> | |
eaaece26 | 14 | #include <linux/module.h> |
22a9835c | 15 | #include <linux/pfn.h> |
1da177e4 LT |
16 | |
17 | #include <asm/setup.h> | |
18 | ||
19 | extern char _end[]; | |
20 | ||
21 | struct pglist_data *node_data[MAX_NUMNODES]; | |
eaaece26 | 22 | EXPORT_SYMBOL(node_data); |
1da177e4 LT |
23 | |
24 | pg_data_t m32r_node_data[MAX_NUMNODES]; | |
25 | ||
26 | /* Memory profile */ | |
27 | typedef struct { | |
28 | unsigned long start_pfn; | |
29 | unsigned long pages; | |
30 | unsigned long holes; | |
31 | unsigned long free_pfn; | |
32 | } mem_prof_t; | |
33 | static mem_prof_t mem_prof[MAX_NUMNODES]; | |
34 | ||
6b6fabce HT |
35 | extern unsigned long memory_start; |
36 | extern unsigned long memory_end; | |
37 | ||
1da177e4 LT |
38 | static void __init mem_prof_init(void) |
39 | { | |
40 | unsigned long start_pfn, holes, free_pfn; | |
41 | const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1); | |
42 | unsigned long ul; | |
43 | mem_prof_t *mp; | |
44 | ||
45 | /* Node#0 SDRAM */ | |
46 | mp = &mem_prof[0]; | |
47 | mp->start_pfn = PFN_UP(CONFIG_MEMORY_START); | |
6b6fabce | 48 | mp->pages = PFN_DOWN(memory_end - memory_start); |
1da177e4 LT |
49 | mp->holes = 0; |
50 | mp->free_pfn = PFN_UP(__pa(_end)); | |
51 | ||
52 | /* Node#1 internal SRAM */ | |
53 | mp = &mem_prof[1]; | |
54 | start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START); | |
55 | holes = 0; | |
56 | if (start_pfn & (zone_alignment - 1)) { | |
57 | ul = zone_alignment; | |
58 | while (start_pfn >= ul) | |
59 | ul += zone_alignment; | |
60 | ||
61 | start_pfn = ul - zone_alignment; | |
62 | holes = free_pfn - start_pfn; | |
63 | } | |
64 | ||
65 | mp->start_pfn = start_pfn; | |
66 | mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes; | |
67 | mp->holes = holes; | |
68 | mp->free_pfn = PFN_UP(CONFIG_IRAM_START); | |
69 | } | |
70 | ||
71 | unsigned long __init setup_memory(void) | |
72 | { | |
73 | unsigned long bootmap_size; | |
74 | unsigned long min_pfn; | |
75 | int nid; | |
76 | mem_prof_t *mp; | |
77 | ||
78 | max_low_pfn = 0; | |
79 | min_low_pfn = -1; | |
80 | ||
81 | mem_prof_init(); | |
82 | ||
83 | for_each_online_node(nid) { | |
84 | mp = &mem_prof[nid]; | |
85 | NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid]; | |
b61bfa3c | 86 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
1da177e4 LT |
87 | min_pfn = mp->start_pfn; |
88 | max_pfn = mp->start_pfn + mp->pages; | |
89 | bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn, | |
90 | mp->start_pfn, max_pfn); | |
91 | ||
92 | free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn), | |
93 | PFN_PHYS(mp->pages)); | |
94 | ||
95 | reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn), | |
72a7fe39 BW |
96 | PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size, |
97 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
98 | |
99 | if (max_low_pfn < max_pfn) | |
100 | max_low_pfn = max_pfn; | |
101 | ||
102 | if (min_low_pfn > min_pfn) | |
103 | min_low_pfn = min_pfn; | |
104 | } | |
105 | ||
106 | #ifdef CONFIG_BLK_DEV_INITRD | |
107 | if (LOADER_TYPE && INITRD_START) { | |
108 | if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) { | |
109 | reserve_bootmem_node(NODE_DATA(0), INITRD_START, | |
72a7fe39 | 110 | INITRD_SIZE, BOOTMEM_DEFAULT); |
19e5d9c0 | 111 | initrd_start = INITRD_START + PAGE_OFFSET; |
1da177e4 LT |
112 | initrd_end = initrd_start + INITRD_SIZE; |
113 | printk("initrd:start[%08lx],size[%08lx]\n", | |
114 | initrd_start, INITRD_SIZE); | |
115 | } else { | |
116 | printk("initrd extends beyond end of memory " | |
947d0496 | 117 | "(0x%08lx > 0x%08llx)\ndisabling initrd\n", |
1da177e4 | 118 | INITRD_START + INITRD_SIZE, |
947d0496 | 119 | (unsigned long long)PFN_PHYS(max_low_pfn)); |
1da177e4 LT |
120 | |
121 | initrd_start = 0; | |
122 | } | |
123 | } | |
124 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
125 | ||
126 | return max_low_pfn; | |
127 | } | |
128 | ||
3560e249 | 129 | #define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn) |
1da177e4 LT |
130 | #define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn) |
131 | ||
132 | unsigned long __init zone_sizes_init(void) | |
133 | { | |
134 | unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES]; | |
135 | unsigned long low, start_pfn; | |
136 | unsigned long holes = 0; | |
137 | int nid, i; | |
138 | mem_prof_t *mp; | |
139 | ||
1da177e4 LT |
140 | for_each_online_node(nid) { |
141 | mp = &mem_prof[nid]; | |
142 | for (i = 0 ; i < MAX_NR_ZONES ; i++) { | |
143 | zones_size[i] = 0; | |
144 | zholes_size[i] = 0; | |
145 | } | |
146 | start_pfn = START_PFN(nid); | |
147 | low = MAX_LOW_PFN(nid); | |
148 | zones_size[ZONE_DMA] = low - start_pfn; | |
149 | zholes_size[ZONE_DMA] = mp->holes; | |
150 | holes += zholes_size[ZONE_DMA]; | |
151 | ||
9109fb7b | 152 | free_area_init_node(nid, zones_size, start_pfn, zholes_size); |
1da177e4 LT |
153 | } |
154 | ||
155 | /* | |
156 | * For test | |
157 | * Use all area of internal RAM. | |
158 | * see __alloc_pages() | |
159 | */ | |
41858966 MG |
160 | NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0; |
161 | NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0; | |
162 | NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0; | |
1da177e4 LT |
163 | |
164 | return holes; | |
165 | } |