1 /*
2 * linux/arch/cris/mm/init.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 * Copyright (C) 2000,2001 Axis Communications AB
6 *
7 * Authors: Bjorn Wesen (bjornw@axis.com)
8 *
9 */
10
11 #include <linux/gfp.h>
12 #include <linux/init.h>
13 #include <linux/bootmem.h>
14 #include <linux/proc_fs.h>
15 #include <linux/kcore.h>
16 #include <asm/tlb.h>
17 #include <asm/sections.h>
18
19 unsigned long empty_zero_page;
20 EXPORT_SYMBOL(empty_zero_page);
21
mem_init(void)22 void __init mem_init(void)
23 {
24 BUG_ON(!mem_map);
25
26 /* max/min_low_pfn was set by setup.c
27 * now we just copy it to some other necessary places...
28 *
29 * high_memory was also set in setup.c
30 */
31 max_mapnr = max_low_pfn - min_low_pfn;
32 free_all_bootmem();
33 mem_init_print_info(NULL);
34 }
35
36 /* Free a range of init pages. Virtual addresses. */
37
free_init_pages(const char * what,unsigned long begin,unsigned long end)38 void free_init_pages(const char *what, unsigned long begin, unsigned long end)
39 {
40 unsigned long addr;
41
42 for (addr = begin; addr < end; addr += PAGE_SIZE) {
43 ClearPageReserved(virt_to_page(addr));
44 init_page_count(virt_to_page(addr));
45 free_page(addr);
46 totalram_pages++;
47 }
48
49 printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
50 }
51
52 /* Free the pages occupied by initialization code. */
53
free_initmem(void)54 void free_initmem(void)
55 {
56 free_initmem_default(-1);
57 }
58
59 /* Free the pages occupied by initrd code. */
60
61 #ifdef CONFIG_BLK_DEV_INITRD
free_initrd_mem(unsigned long start,unsigned long end)62 void free_initrd_mem(unsigned long start, unsigned long end)
63 {
64 free_init_pages("initrd memory",
65 start,
66 end);
67 }
68 #endif
69