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1da177e4 LT |
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 | * | |
1da177e4 LT |
9 | */ |
10 | ||
5a0e3ad6 | 11 | #include <linux/gfp.h> |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/bootmem.h> | |
14 | #include <asm/tlb.h> | |
15 | ||
16 | DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); | |
17 | ||
18 | unsigned long empty_zero_page; | |
19 | ||
20 | extern char _stext, _edata, _etext; /* From linkerscript */ | |
21 | extern char __init_begin, __init_end; | |
22 | ||
1da177e4 LT |
23 | void __init |
24 | mem_init(void) | |
25 | { | |
26 | int codesize, reservedpages, datasize, initsize; | |
27 | unsigned long tmp; | |
28 | ||
59b97760 | 29 | BUG_ON(!mem_map); |
1da177e4 LT |
30 | |
31 | /* max/min_low_pfn was set by setup.c | |
32 | * now we just copy it to some other necessary places... | |
33 | * | |
34 | * high_memory was also set in setup.c | |
35 | */ | |
36 | ||
37 | max_mapnr = num_physpages = max_low_pfn - min_low_pfn; | |
38 | ||
39 | /* this will put all memory onto the freelists */ | |
40 | totalram_pages = free_all_bootmem(); | |
41 | ||
42 | reservedpages = 0; | |
43 | for (tmp = 0; tmp < max_mapnr; tmp++) { | |
44 | /* | |
45 | * Only count reserved RAM pages | |
46 | */ | |
47 | if (PageReserved(mem_map + tmp)) | |
48 | reservedpages++; | |
49 | } | |
50 | ||
51 | codesize = (unsigned long) &_etext - (unsigned long) &_stext; | |
52 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
53 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
54 | ||
55 | printk(KERN_INFO | |
56 | "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, " | |
57 | "%dk init)\n" , | |
cc013a88 | 58 | nr_free_pages() << (PAGE_SHIFT-10), |
1da177e4 LT |
59 | max_mapnr << (PAGE_SHIFT-10), |
60 | codesize >> 10, | |
61 | reservedpages << (PAGE_SHIFT-10), | |
62 | datasize >> 10, | |
63 | initsize >> 10 | |
64 | ); | |
65 | } | |
66 | ||
67 | /* free the pages occupied by initialization code */ | |
68 | ||
69 | void | |
70 | free_initmem(void) | |
71 | { | |
72 | unsigned long addr; | |
73 | ||
74 | addr = (unsigned long)(&__init_begin); | |
75 | for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { | |
76 | ClearPageReserved(virt_to_page(addr)); | |
7835e98b | 77 | init_page_count(virt_to_page(addr)); |
1da177e4 LT |
78 | free_page(addr); |
79 | totalram_pages++; | |
80 | } | |
81 | printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n", | |
82 | (unsigned long)((&__init_end - &__init_begin) >> 10)); | |
83 | } |