]>
git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-x86_64/e820.h
2 * structures and definitions for the int 15, ax=e820 memory map
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
14 #include <linux/mmzone.h>
16 #define E820MAP 0x2d0 /* our map */
17 #define E820MAX 128 /* number of entries in E820MAP */
18 #define E820NR 0x1e8 /* # entries in E820MAP */
21 #define E820_RESERVED 2
22 #define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */
25 #define HIGH_MEMORY (1024*1024)
27 #define LOWMEMSIZE() (0x9f000)
31 u64 addr
; /* start of memory segment */
32 u64 size
; /* size of memory segment */
33 u32 type
; /* type of memory segment */
34 } __attribute__((packed
));
38 struct e820entry map
[E820MAX
];
41 extern unsigned long find_e820_area(unsigned long start
, unsigned long end
,
43 extern void add_memory_region(unsigned long start
, unsigned long size
,
45 extern void setup_memory_region(void);
46 extern void contig_e820_setup(void);
47 extern unsigned long e820_end_of_ram(void);
48 extern void e820_reserve_resources(void);
49 extern void e820_print_map(char *who
);
50 extern int e820_mapped(unsigned long start
, unsigned long end
, unsigned type
);
52 extern void e820_bootmem_free(pg_data_t
*pgdat
, unsigned long start
,unsigned long end
);
53 extern void e820_setup_gap(void);
55 extern void __init
parse_memopt(char *p
, char **end
);
57 extern struct e820map e820
;
58 #endif/*!__ASSEMBLY__*/
60 #endif/*__E820_HEADER*/