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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-x86_64/e820.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-x86_64/e820.h')
-rw-r--r--include/asm-x86_64/e820.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/include/asm-x86_64/e820.h b/include/asm-x86_64/e820.h
new file mode 100644
index 000000000000..5b376e42b153
--- /dev/null
+++ b/include/asm-x86_64/e820.h
@@ -0,0 +1,59 @@
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/mmzone.h>
15
16#define E820MAP 0x2d0 /* our map */
17#define E820MAX 32 /* number of entries in E820MAP */
18#define E820NR 0x1e8 /* # entries in E820MAP */
19
20#define E820_RAM 1
21#define E820_RESERVED 2
22#define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */
23#define E820_NVS 4
24
25#define HIGH_MEMORY (1024*1024)
26
27#define LOWMEMSIZE() (0x9f000)
28
29#ifndef __ASSEMBLY__
30struct e820entry {
31 u64 addr; /* start of memory segment */
32 u64 size; /* size of memory segment */
33 u32 type; /* type of memory segment */
34} __attribute__((packed));
35
36struct e820map {
37 int nr_map;
38 struct e820entry map[E820MAX];
39};
40
41extern unsigned long find_e820_area(unsigned long start, unsigned long end,
42 unsigned size);
43extern void add_memory_region(unsigned long start, unsigned long size,
44 int type);
45extern void setup_memory_region(void);
46extern void contig_e820_setup(void);
47extern unsigned long e820_end_of_ram(void);
48extern void e820_reserve_resources(void);
49extern void e820_print_map(char *who);
50extern int e820_mapped(unsigned long start, unsigned long end, unsigned type);
51
52extern void e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end);
53
54extern void __init parse_memopt(char *p, char **end);
55
56extern struct e820map e820;
57#endif/*!__ASSEMBLY__*/
58
59#endif/*__E820_HEADER*/