1 // SPDX-License-Identifier: GPL-2.0
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 *
10 */
11
12 #include <linux/gfp.h>
13 #include <linux/init.h>
14 #include <linux/bootmem.h>
15 #include <linux/proc_fs.h>
16 #include <linux/kcore.h>
17 #include <asm/tlb.h>
18 #include <asm/sections.h>
19
20 unsigned long empty_zero_page;
21 EXPORT_SYMBOL(empty_zero_page);
22
mem_init(void)23 void __init mem_init(void)
24 {
25 BUG_ON(!mem_map);
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 */
32 max_mapnr = max_low_pfn - min_low_pfn;
33 free_all_bootmem();
34 mem_init_print_info(NULL);
35 }
36
37 /* Free a range of init pages. Virtual addresses. */
38
free_init_pages(const char * what,unsigned long begin,unsigned long end)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
free_initmem(void)55 void free_initmem(void)
56 {
57 free_initmem_default(-1);
58 }
59
60 /* Free the pages occupied by initrd code. */
61
62 #ifdef CONFIG_BLK_DEV_INITRD
free_initrd_mem(unsigned long start,unsigned long end)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
70