projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 35 | static void __init mem_prof_init(void) | |
| 36 | { | |
| 37 | unsigned long start_pfn, holes, free_pfn; | |
| 38 | const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1); | |
| 39 | unsigned long ul; | |
| 40 | mem_prof_t *mp; | |
| 41 | ||
| 42 | /* Node#0 SDRAM */ | |
| 43 | mp = &mem_prof[0]; | |
| 44 | mp->start_pfn = PFN_UP(CONFIG_MEMORY_START); | |
| 45 | mp->pages = PFN_DOWN(CONFIG_MEMORY_SIZE); | |
| 46 | mp->holes = 0; | |
| 47 | mp->free_pfn = PFN_UP(__pa(_end)); | |
| 48 | ||
| 49 | /* Node#1 internal SRAM */ | |
| 50 | mp = &mem_prof[1]; | |
| 51 | start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START); | |
| 52 | holes = 0; | |
| 53 | if (start_pfn & (zone_alignment - 1)) { | |
| 54 | ul = zone_alignment; | |
| 55 | while (start_pfn >= ul) | |
| 56 | ul += zone_alignment; | |
| 57 | ||
| 58 | start_pfn = ul - zone_alignment; | |
| 59 | holes = free_pfn - start_pfn; | |
| 60 | } | |
| 61 | ||
| 62 | mp->start_pfn = start_pfn; | |
| 63 | mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes; | |
| 64 | mp->holes = holes; | |
| 65 | mp->free_pfn = PFN_UP(CONFIG_IRAM_START); | |
| 66 | } | |
| 67 | ||
| 68 | unsigned long __init setup_memory(void) | |
| 69 | { | |
| 70 | unsigned long bootmap_size; | |
| 71 | unsigned long min_pfn; | |
| 72 | int nid; | |
| 73 | mem_prof_t *mp; | |
| 74 | ||
| 75 | max_low_pfn = 0; | |
| 76 | min_low_pfn = -1; | |
| 77 | ||
| 78 | mem_prof_init(); | |
| 79 | ||
| 80 | for_each_online_node(nid) { | |
| 81 | mp = &mem_prof[nid]; | |
| 82 | NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid]; | |
| b61bfa3c | 83 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
| 1da177e4 LT |
84 | min_pfn = mp->start_pfn; |
| 85 | max_pfn = mp->start_pfn + mp->pages; | |
| 86 | bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn, | |
| 87 | mp->start_pfn, max_pfn); | |
| 88 | ||
| 89 | free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn), | |
| 90 | PFN_PHYS(mp->pages)); | |
| 91 | ||
| 92 | reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn), | |
| 72a7fe39 BW |
93 | PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size, |
| 94 | BOOTMEM_DEFAULT); | |
| 1da177e4 LT |
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, | |
| 72a7fe39 | 107 | INITRD_SIZE, BOOTMEM_DEFAULT); |
| 19e5d9c0 | 108 | initrd_start = INITRD_START + PAGE_OFFSET; |
| 1da177e4 LT |
109 | initrd_end = initrd_start + INITRD_SIZE; |
| 110 | printk("initrd:start[%08lx],size[%08lx]\n", | |
| 111 | initrd_start, INITRD_SIZE); | |
| 112 | } else { | |
| 113 | printk("initrd extends beyond end of memory " | |
| 114 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
| 115 | INITRD_START + INITRD_SIZE, | |
| 116 | PFN_PHYS(max_low_pfn)); | |
| 117 | ||
| 118 | initrd_start = 0; | |
| 119 | } | |
| 120 | } | |
| 121 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
| 122 | ||
| 123 | return max_low_pfn; | |
| 124 | } | |
| 125 | ||
| 126 | #define START_PFN(nid) \ | |
| 127 | (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT) | |
| 128 | #define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn) | |
| 129 | ||
| 130 | unsigned long __init zone_sizes_init(void) | |
| 131 | { | |
| 132 | unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES]; | |
| 133 | unsigned long low, start_pfn; | |
| 134 | unsigned long holes = 0; | |
| 135 | int nid, i; | |
| 136 | mem_prof_t *mp; | |
| 137 | ||
| 1da177e4 LT |
138 | for_each_online_node(nid) { |
| 139 | mp = &mem_prof[nid]; | |
| 140 | for (i = 0 ; i < MAX_NR_ZONES ; i++) { | |
| 141 | zones_size[i] = 0; | |
| 142 | zholes_size[i] = 0; | |
| 143 | } | |
| 144 | start_pfn = START_PFN(nid); | |
| 145 | low = MAX_LOW_PFN(nid); | |
| 146 | zones_size[ZONE_DMA] = low - start_pfn; | |
| 147 | zholes_size[ZONE_DMA] = mp->holes; | |
| 148 | holes += zholes_size[ZONE_DMA]; | |
| 149 | ||
| 150 | free_area_init_node(nid, NODE_DATA(nid), zones_size, | |
| 151 | start_pfn, zholes_size); | |
| 152 | } | |
| 153 | ||
| 154 | /* | |
| 155 | * For test | |
| 156 | * Use all area of internal RAM. | |
| 157 | * see __alloc_pages() | |
| 158 | */ | |
| 159 | NODE_DATA(1)->node_zones->pages_min = 0; | |
| 160 | NODE_DATA(1)->node_zones->pages_low = 0; | |
| 161 | NODE_DATA(1)->node_zones->pages_high = 0; | |
| 162 | ||
| 163 | return holes; | |
| 164 | } |