2 * structures and definitions for the int 15, ax=e820 memory map
5 * In a nutshell, arch/i386/boot/setup.S populates a scratch table
6 * in the empty_zero_block that contains a list of usable address/size
7 * duples. In arch/i386/kernel/setup.c, this information is
8 * transferred into the e820map, and in arch/i386/mm/init.c, that
9 * new information is used to mark pages reserved or not.
15 #define E820MAP 0x2d0 /* our map */
16 #define E820MAX 128 /* number of entries in E820MAP */
17 #define E820NR 0x1e8 /* # entries in E820MAP */
20 #define E820_RESERVED 2
24 #define HIGH_MEMORY (1024*1024)
29 u64 addr
; /* start of memory segment */
30 u64 size
; /* size of memory segment */
31 u32 type
; /* type of memory segment */
32 } __attribute__((packed
));
36 struct e820entry map
[E820MAX
];
39 extern struct e820map e820
;
41 extern int e820_all_mapped(unsigned long start
, unsigned long end
,
43 extern int e820_any_mapped(u64 start
, u64 end
, unsigned type
);
44 extern void find_max_pfn(void);
45 extern void register_bootmem_low_pages(unsigned long max_low_pfn
);
46 extern void e820_register_memory(void);
47 extern void limit_regions(unsigned long long size
);
48 extern void print_memory_map(char *who
);
50 #if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
51 extern void e820_mark_nosave_regions(void);
53 static inline void e820_mark_nosave_regions(void)
58 #endif/*!__ASSEMBLY__*/
60 #endif/*__E820_HEADER*/