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
27 u64 addr; /* start of memory segment */
28 u64 size; /* size of memory segment */
29 u32 type; /* type of memory segment */
30 } __attribute__((packed));
34 struct e820entry map[E820MAX];
37 extern unsigned long find_e820_area(unsigned long start, unsigned long end,
39 extern void add_memory_region(unsigned long start, unsigned long size,
41 extern void setup_memory_region(void);
42 extern void contig_e820_setup(void);
43 extern unsigned long e820_end_of_ram(void);
44 extern void e820_reserve_resources(void);
45 extern void e820_mark_nosave_regions(void);
46 extern void e820_print_map(char *who);
47 extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);
48 extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);
49 extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
51 extern void e820_setup_gap(void);
52 extern void e820_register_active_regions(int nid,
53 unsigned long start_pfn, unsigned long end_pfn);
55 extern void finish_e820_parsing(void);
57 extern struct e820map e820;
59 extern unsigned ebda_addr, ebda_size;
60 extern unsigned long nodemap_addr, nodemap_size;
61 #endif/*!__ASSEMBLY__*/
63 #endif/*__E820_HEADER*/