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

 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
19unsigned long empty_zero_page;
20EXPORT_SYMBOL(empty_zero_page);
21
22void __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
38void 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
54void 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
62void free_initrd_mem(unsigned long start, unsigned long end)
63{
64	free_init_pages("initrd memory",
65	                start,
66	                end);
 
67}
68#endif