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/*
* structures and definitions for the int 15, ax=e820 memory map
* scheme.
*
* In a nutshell, arch/i386/boot/setup.S populates a scratch table
* in the empty_zero_block that contains a list of usable address/size
* duples. In arch/i386/kernel/setup.c, this information is
* transferred into the e820map, and in arch/i386/mm/init.c, that
* new information is used to mark pages reserved or not.
*
*/
#ifndef __E820_HEADER
#define __E820_HEADER
#define E820MAP 0x2d0 /* our map */
#define E820MAX 128 /* number of entries in E820MAP */
#define E820NR 0x1e8 /* # entries in E820MAP */
#define E820_RAM 1
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#define HIGH_MEMORY (1024*1024)
#ifndef __ASSEMBLY__
struct e820entry {
u64 addr; /* start of memory segment */
u64 size; /* size of memory segment */
u32 type; /* type of memory segment */
} __attribute__((packed));
struct e820map {
u32 nr_map;
struct e820entry map[E820MAX];
};
extern struct e820map e820;
extern int e820_all_mapped(unsigned long start, unsigned long end,
unsigned type);
extern int e820_any_mapped(u64 start, u64 end, unsigned type);
extern void find_max_pfn(void);
extern void register_bootmem_low_pages(unsigned long max_low_pfn);
extern void e820_register_memory(void);
extern void limit_regions(unsigned long long size);
extern void print_memory_map(char *who);
#endif/*!__ASSEMBLY__*/
#endif/*__E820_HEADER*/
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