Remove obsolete #include <linux/config.h>
[linux-2.6.git] / arch / m32r / mm / discontig.c
1 /*
2  *  linux/arch/m32r/mm/discontig.c
3  *
4  *  Discontig memory support
5  *
6  *  Copyright (c) 2003  Hitoshi Yamamoto
7  */
8
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>
16
17 #include <asm/setup.h>
18
19 extern char _end[];
20
21 struct pglist_data *node_data[MAX_NUMNODES];
22 EXPORT_SYMBOL(node_data);
23 static bootmem_data_t node_bdata[MAX_NUMNODES] __initdata;
24
25 pg_data_t m32r_node_data[MAX_NUMNODES];
26
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];
35
36 static void __init mem_prof_init(void)
37 {
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;
42
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));
49
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;
58
59                 start_pfn = ul - zone_alignment;
60                 holes = free_pfn - start_pfn;
61         }
62
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);
67 }
68
69 unsigned long __init setup_memory(void)
70 {
71         unsigned long bootmap_size;
72         unsigned long min_pfn;
73         int nid;
74         mem_prof_t *mp;
75
76         max_low_pfn = 0;
77         min_low_pfn = -1;
78
79         mem_prof_init();
80
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);
89
90                 free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
91                         PFN_PHYS(mp->pages));
92
93                 reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
94                         PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size);
95
96                 if (max_low_pfn < max_pfn)
97                         max_low_pfn = max_pfn;
98
99                 if (min_low_pfn > min_pfn)
100                         min_low_pfn = min_pfn;
101         }
102
103 #ifdef CONFIG_BLK_DEV_INITRD
104         if (LOADER_TYPE && INITRD_START) {
105                 if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
106                         reserve_bootmem_node(NODE_DATA(0), INITRD_START,
107                                 INITRD_SIZE);
108                         initrd_start = INITRD_START ?
109                                 INITRD_START + PAGE_OFFSET : 0;
110
111                         initrd_end = initrd_start + INITRD_SIZE;
112                         printk("initrd:start[%08lx],size[%08lx]\n",
113                                 initrd_start, INITRD_SIZE);
114                 } else {
115                         printk("initrd extends beyond end of memory "
116                                 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
117                                 INITRD_START + INITRD_SIZE,
118                                 PFN_PHYS(max_low_pfn));
119
120                         initrd_start = 0;
121                 }
122         }
123 #endif  /* CONFIG_BLK_DEV_INITRD */
124
125         return max_low_pfn;
126 }
127
128 #define START_PFN(nid)  \
129         (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
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
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
152                 free_area_init_node(nid, NODE_DATA(nid), zones_size,
153                         start_pfn, zholes_size);
154         }
155
156         /*
157          * For test
158          *  Use all area of internal RAM.
159          *  see __alloc_pages()
160          */
161         NODE_DATA(1)->node_zones->pages_min = 0;
162         NODE_DATA(1)->node_zones->pages_low = 0;
163         NODE_DATA(1)->node_zones->pages_high = 0;
164
165         return holes;
166 }
167