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 19extern char _end[]; 20 21struct pglist_data *node_data[MAX_NUMNODES]; 22EXPORT_SYMBOL(node_data); 23static bootmem_data_t node_bdata[MAX_NUMNODES] __initdata; 24 25pg_data_t m32r_node_data[MAX_NUMNODES]; 26 27/* Memory profile */ 28typedef struct { 29 unsigned long start_pfn; 30 unsigned long pages; 31 unsigned long holes; 32 unsigned long free_pfn; 33} mem_prof_t; 34static mem_prof_t mem_prof[MAX_NUMNODES]; 35 36static 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 69unsigned 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 + PAGE_OFFSET; 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 130unsigned 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; 137 138 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} 165