2 * linux/arch/m68k/mm/init.c
4 * Copyright (C) 1995 Hamish Macdonald
6 * Contains common initialization routines, specific init code moved
7 * to motorola.c and sun3mmu.c
10 #include <linux/module.h>
11 #include <linux/signal.h>
12 #include <linux/sched.h>
14 #include <linux/swap.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/types.h>
18 #include <linux/init.h>
19 #include <linux/bootmem.h>
20 #include <linux/gfp.h>
22 #include <asm/setup.h>
23 #include <asm/uaccess.h>
25 #include <asm/pgalloc.h>
26 #include <asm/system.h>
27 #include <asm/machdep.h>
30 #include <asm/atari_stram.h>
32 #include <asm/sections.h>
35 pg_data_t pg_data_map[MAX_NUMNODES];
36 EXPORT_SYMBOL(pg_data_map);
38 int m68k_virt_to_node_shift;
40 #ifndef CONFIG_SINGLE_MEMORY_CHUNK
41 pg_data_t *pg_data_table[65];
42 EXPORT_SYMBOL(pg_data_table);
45 void __init m68k_setup_node(int node)
47 #ifndef CONFIG_SINGLE_MEMORY_CHUNK
48 struct mem_info *info = m68k_memory + node;
51 i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
52 end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
53 for (; i <= end; i++) {
55 printk("overlap at %u for chunk %u\n", i, node);
56 pg_data_table[i] = pg_data_map + node;
59 pg_data_map[node].bdata = bootmem_node_data + node;
60 node_set_online(node);
65 * ZERO_PAGE is a special page that is used for zero-initialized
69 void *empty_zero_page;
70 EXPORT_SYMBOL(empty_zero_page);
72 extern void init_pointer_table(unsigned long ptable);
74 /* References to section boundaries */
76 extern pmd_t *zero_pgtable;
78 void __init mem_init(void)
86 /* this will put all memory onto the freelists */
87 totalram_pages = num_physpages = 0;
88 for_each_online_pgdat(pgdat) {
89 num_physpages += pgdat->node_present_pages;
91 totalram_pages += free_all_bootmem_node(pgdat);
92 for (i = 0; i < pgdat->node_spanned_pages; i++) {
93 struct page *page = pgdat->node_mem_map + i;
94 char *addr = page_to_virt(page);
96 if (!PageReserved(page))
101 else if (addr >= __init_begin &&
110 /* insert pointer tables allocated so far into the tablelist */
111 init_pointer_table((unsigned long)kernel_pg_dir);
112 for (i = 0; i < PTRS_PER_PGD; i++) {
113 if (pgd_present(kernel_pg_dir[i]))
114 init_pointer_table(__pgd_page(kernel_pg_dir[i]));
117 /* insert also pointer table that we used to unmap the zero page */
119 init_pointer_table((unsigned long)zero_pgtable);
122 printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
123 nr_free_pages() << (PAGE_SHIFT-10),
124 totalram_pages << (PAGE_SHIFT-10),
125 codepages << (PAGE_SHIFT-10),
126 datapages << (PAGE_SHIFT-10),
127 initpages << (PAGE_SHIFT-10));
130 #ifdef CONFIG_BLK_DEV_INITRD
131 void free_initrd_mem(unsigned long start, unsigned long end)
134 for (; start < end; start += PAGE_SIZE) {
135 ClearPageReserved(virt_to_page(start));
136 init_page_count(virt_to_page(start));
141 printk ("Freeing initrd memory: %dk freed\n", pages);