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, setup.S populates a scratch table in the
6 * empty_zero_block that contains a list of usable address/size
7 * duples. setup.c, this information is transferred into the e820map,
8 * and in init.c/numa.c, that new information is used to mark pages
9 * reserved or not.
10 */
11#ifndef __E820_HEADER
12#define __E820_HEADER
13
14#include <linux/ioport.h>
15
16#ifndef __ASSEMBLY__
17extern unsigned long find_e820_area(unsigned long start, unsigned long end,
18 unsigned size, unsigned long align);
19extern void add_memory_region(unsigned long start, unsigned long size,
20 int type);
21extern void setup_memory_region(void);
22extern void contig_e820_setup(void);
23extern unsigned long e820_end_of_ram(void);
24extern void e820_reserve_resources(struct resource *code_resource,
25 struct resource *data_resource, struct resource *bss_resource);
26extern void e820_mark_nosave_regions(void);
27extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);
28extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);
29extern int e820_any_non_reserved(unsigned long start, unsigned long end);
30extern int is_memory_any_valid(unsigned long start, unsigned long end);
31extern int e820_all_non_reserved(unsigned long start, unsigned long end);
32extern int is_memory_all_valid(unsigned long start, unsigned long end);
33extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
34
35extern void e820_setup_gap(void);
36extern void e820_register_active_regions(int nid,
37 unsigned long start_pfn, unsigned long end_pfn);
38
39extern void finish_e820_parsing(void);
40
41extern struct e820map e820;
42extern void update_e820(void);
43
44extern void reserve_early(unsigned long start, unsigned long end, char *name);
45extern void early_res_to_bootmem(void);
46
47#endif/*!__ASSEMBLY__*/
48
49#endif/*__E820_HEADER*/