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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/cris/mm/init.c | |
4 | * | |
5 | * Copyright (C) 1995 Linus Torvalds | |
6 | * Copyright (C) 2000,2001 Axis Communications AB | |
7 | * | |
8 | * Authors: Bjorn Wesen (bjornw@axis.com) | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
5a0e3ad6 | 12 | #include <linux/gfp.h> |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/bootmem.h> | |
80d6170a JN |
15 | #include <linux/proc_fs.h> |
16 | #include <linux/kcore.h> | |
1da177e4 | 17 | #include <asm/tlb.h> |
2e529815 | 18 | #include <asm/sections.h> |
1da177e4 | 19 | |
1da177e4 | 20 | unsigned long empty_zero_page; |
80d6170a | 21 | EXPORT_SYMBOL(empty_zero_page); |
1da177e4 | 22 | |
80d6170a | 23 | void __init mem_init(void) |
1da177e4 | 24 | { |
59b97760 | 25 | BUG_ON(!mem_map); |
1da177e4 LT |
26 | |
27 | /* max/min_low_pfn was set by setup.c | |
28 | * now we just copy it to some other necessary places... | |
29 | * | |
30 | * high_memory was also set in setup.c | |
31 | */ | |
4e422de9 | 32 | max_mapnr = max_low_pfn - min_low_pfn; |
0c988534 | 33 | free_all_bootmem(); |
4e422de9 | 34 | mem_init_print_info(NULL); |
1da177e4 LT |
35 | } |
36 | ||
80d6170a | 37 | /* Free a range of init pages. Virtual addresses. */ |
1da177e4 | 38 | |
80d6170a JN |
39 | void free_init_pages(const char *what, unsigned long begin, unsigned long end) |
40 | { | |
41 | unsigned long addr; | |
42 | ||
43 | for (addr = begin; addr < end; addr += PAGE_SIZE) { | |
44 | ClearPageReserved(virt_to_page(addr)); | |
45 | init_page_count(virt_to_page(addr)); | |
46 | free_page(addr); | |
47 | totalram_pages++; | |
48 | } | |
49 | ||
50 | printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); | |
51 | } | |
52 | ||
53 | /* Free the pages occupied by initialization code. */ | |
54 | ||
55 | void free_initmem(void) | |
1da177e4 | 56 | { |
dbe67df4 | 57 | free_initmem_default(-1); |
1da177e4 | 58 | } |
80d6170a JN |
59 | |
60 | /* Free the pages occupied by initrd code. */ | |
61 | ||
62 | #ifdef CONFIG_BLK_DEV_INITRD | |
63 | void free_initrd_mem(unsigned long start, unsigned long end) | |
64 | { | |
65 | free_init_pages("initrd memory", | |
66 | start, | |
67 | end); | |
68 | } | |
69 | #endif |