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 long size, unsigned long align);
19extern unsigned long find_e820_area_size(unsigned long start,
20 unsigned long *sizep,
21 unsigned long align);
22extern void add_memory_region(unsigned long start, unsigned long size,
23 int type);
24extern void update_memory_range(u64 start, u64 size, unsigned old_type,
25 unsigned new_type);
26extern void setup_memory_region(void);
27extern void contig_e820_setup(void);
28extern unsigned long e820_end_of_ram(void);
29extern void e820_reserve_resources(void);
30extern void e820_mark_nosave_regions(void);
31extern int e820_any_mapped(unsigned long start, unsigned long end,
32 unsigned type);
33extern int e820_all_mapped(unsigned long start, unsigned long end,
34 unsigned type);
35extern int e820_any_non_reserved(unsigned long start, unsigned long end);
36extern int is_memory_any_valid(unsigned long start, unsigned long end);
37extern int e820_all_non_reserved(unsigned long start, unsigned long end);
38extern int is_memory_all_valid(unsigned long start, unsigned long end);
39extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
40
41extern void e820_setup_gap(void);
42extern void e820_register_active_regions(int nid, unsigned long start_pfn,
43 unsigned long end_pfn);
44
45extern void finish_e820_parsing(void);
46
47extern struct e820map e820;
48extern void update_e820(void);
49
50extern void reserve_early(unsigned long start, unsigned long end, char *name);
51extern void free_early(unsigned long start, unsigned long end);
52extern void early_res_to_bootmem(unsigned long start, unsigned long end);
53
54#endif/*!__ASSEMBLY__*/
55
56#endif/*__E820_HEADER*/