Linux 2.6.25.3
[linux/fpc-iii.git] / arch / m32r / mm / discontig.c
blob07c1af7dc0e2a3bffec2474e22fab8a17fee0dce
1 /*
2 * linux/arch/m32r/mm/discontig.c
4 * Discontig memory support
6 * Copyright (c) 2003 Hitoshi Yamamoto
7 */
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>
14 #include <linux/module.h>
15 #include <linux/pfn.h>
17 #include <asm/setup.h>
19 extern char _end[];
21 struct pglist_data *node_data[MAX_NUMNODES];
22 EXPORT_SYMBOL(node_data);
23 static bootmem_data_t node_bdata[MAX_NUMNODES] __initdata;
25 pg_data_t m32r_node_data[MAX_NUMNODES];
27 /* Memory profile */
28 typedef struct {
29 unsigned long start_pfn;
30 unsigned long pages;
31 unsigned long holes;
32 unsigned long free_pfn;
33 } mem_prof_t;
34 static mem_prof_t mem_prof[MAX_NUMNODES];
36 static void __init mem_prof_init(void)
38 unsigned long start_pfn, holes, free_pfn;
39 const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
40 unsigned long ul;
41 mem_prof_t *mp;
43 /* Node#0 SDRAM */
44 mp = &mem_prof[0];
45 mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
46 mp->pages = PFN_DOWN(CONFIG_MEMORY_SIZE);
47 mp->holes = 0;
48 mp->free_pfn = PFN_UP(__pa(_end));
50 /* Node#1 internal SRAM */
51 mp = &mem_prof[1];
52 start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
53 holes = 0;
54 if (start_pfn & (zone_alignment - 1)) {
55 ul = zone_alignment;
56 while (start_pfn >= ul)
57 ul += zone_alignment;
59 start_pfn = ul - zone_alignment;
60 holes = free_pfn - start_pfn;
63 mp->start_pfn = start_pfn;
64 mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
65 mp->holes = holes;
66 mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
69 unsigned long __init setup_memory(void)
71 unsigned long bootmap_size;
72 unsigned long min_pfn;
73 int nid;
74 mem_prof_t *mp;
76 max_low_pfn = 0;
77 min_low_pfn = -1;
79 mem_prof_init();
81 for_each_online_node(nid) {
82 mp = &mem_prof[nid];
83 NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
84 NODE_DATA(nid)->bdata = &node_bdata[nid];
85 min_pfn = mp->start_pfn;
86 max_pfn = mp->start_pfn + mp->pages;
87 bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
88 mp->start_pfn, max_pfn);
90 free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
91 PFN_PHYS(mp->pages));
93 reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
94 PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
95 BOOTMEM_DEFAULT);
97 if (max_low_pfn < max_pfn)
98 max_low_pfn = max_pfn;
100 if (min_low_pfn > min_pfn)
101 min_low_pfn = min_pfn;
104 #ifdef CONFIG_BLK_DEV_INITRD
105 if (LOADER_TYPE && INITRD_START) {
106 if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
107 reserve_bootmem_node(NODE_DATA(0), INITRD_START,
108 INITRD_SIZE, BOOTMEM_DEFAULT);
109 initrd_start = INITRD_START + PAGE_OFFSET;
110 initrd_end = initrd_start + INITRD_SIZE;
111 printk("initrd:start[%08lx],size[%08lx]\n",
112 initrd_start, INITRD_SIZE);
113 } else {
114 printk("initrd extends beyond end of memory "
115 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
116 INITRD_START + INITRD_SIZE,
117 PFN_PHYS(max_low_pfn));
119 initrd_start = 0;
122 #endif /* CONFIG_BLK_DEV_INITRD */
124 return max_low_pfn;
127 #define START_PFN(nid) \
128 (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
129 #define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
131 unsigned long __init zone_sizes_init(void)
133 unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
134 unsigned long low, start_pfn;
135 unsigned long holes = 0;
136 int nid, i;
137 mem_prof_t *mp;
139 for_each_online_node(nid) {
140 mp = &mem_prof[nid];
141 for (i = 0 ; i < MAX_NR_ZONES ; i++) {
142 zones_size[i] = 0;
143 zholes_size[i] = 0;
145 start_pfn = START_PFN(nid);
146 low = MAX_LOW_PFN(nid);
147 zones_size[ZONE_DMA] = low - start_pfn;
148 zholes_size[ZONE_DMA] = mp->holes;
149 holes += zholes_size[ZONE_DMA];
151 free_area_init_node(nid, NODE_DATA(nid), zones_size,
152 start_pfn, zholes_size);
156 * For test
157 * Use all area of internal RAM.
158 * see __alloc_pages()
160 NODE_DATA(1)->node_zones->pages_min = 0;
161 NODE_DATA(1)->node_zones->pages_low = 0;
162 NODE_DATA(1)->node_zones->pages_high = 0;
164 return holes;