tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * structures and definitions for the int 15, ax=e820 memory map
3 * scheme.
4 *
5 * In a nutshell, arch/i386/boot/setup.S populates a scratch table
6 * in the empty_zero_block that contains a list of usable address/size
7 * duples. In arch/i386/kernel/setup.c, this information is
8 * transferred into the e820map, and in arch/i386/mm/init.c, that
9 * new information is used to mark pages reserved or not.
10 *
11 */
12#ifndef __E820_HEADER
13#define __E820_HEADER
14
15#include <linux/ioport.h>
16
17#define HIGH_MEMORY (1024*1024)
18
19#ifndef __ASSEMBLY__
20
21extern struct e820map e820;
22extern void update_e820(void);
23
24extern int e820_all_mapped(unsigned long start, unsigned long end,
25 unsigned type);
26extern int e820_any_mapped(u64 start, u64 end, unsigned type);
27extern void propagate_e820_map(void);
28extern void register_bootmem_low_pages(unsigned long max_low_pfn);
29extern void add_memory_region(unsigned long long start,
30 unsigned long long size, int type);
31extern void update_memory_range(u64 start, u64 size, unsigned old_type,
32 unsigned new_type);
33extern void e820_register_memory(void);
34extern void limit_regions(unsigned long long size);
35extern void print_memory_map(char *who);
36extern void init_iomem_resources(struct resource *code_resource,
37 struct resource *data_resource,
38 struct resource *bss_resource);
39
40#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
41extern void e820_mark_nosave_regions(void);
42#else
43static inline void e820_mark_nosave_regions(void)
44{
45}
46#endif
47
48
49#endif/*!__ASSEMBLY__*/
50#endif/*__E820_HEADER*/