blob: 514f46a4b2303baef15045e55fb218b8b1834c28 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 */
10
11#include <linux/init.h>
12#include <linux/bootmem.h>
13#include <asm/tlb.h>
14
15DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
16
17unsigned long empty_zero_page;
18
19extern char _stext, _edata, _etext; /* From linkerscript */
20extern char __init_begin, __init_end;
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022void __init
23mem_init(void)
24{
25 int codesize, reservedpages, datasize, initsize;
26 unsigned long tmp;
27
Stoyan Gaydarov59b97762009-03-10 06:10:40 +010028 BUG_ON(!mem_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30 /* max/min_low_pfn was set by setup.c
31 * now we just copy it to some other necessary places...
32 *
33 * high_memory was also set in setup.c
34 */
35
36 max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
37
38 /* this will put all memory onto the freelists */
39 totalram_pages = free_all_bootmem();
40
41 reservedpages = 0;
42 for (tmp = 0; tmp < max_mapnr; tmp++) {
43 /*
44 * Only count reserved RAM pages
45 */
46 if (PageReserved(mem_map + tmp))
47 reservedpages++;
48 }
49
50 codesize = (unsigned long) &_etext - (unsigned long) &_stext;
51 datasize = (unsigned long) &_edata - (unsigned long) &_etext;
52 initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
53
54 printk(KERN_INFO
55 "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
56 "%dk init)\n" ,
57 (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
58 max_mapnr << (PAGE_SHIFT-10),
59 codesize >> 10,
60 reservedpages << (PAGE_SHIFT-10),
61 datasize >> 10,
62 initsize >> 10
63 );
64}
65
66/* free the pages occupied by initialization code */
67
68void
69free_initmem(void)
70{
71 unsigned long addr;
72
73 addr = (unsigned long)(&__init_begin);
74 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
75 ClearPageReserved(virt_to_page(addr));
Nick Piggin7835e982006-03-22 00:08:40 -080076 init_page_count(virt_to_page(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 free_page(addr);
78 totalram_pages++;
79 }
80 printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
81 (unsigned long)((&__init_end - &__init_begin) >> 10));
82}