e820.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * structures and definitions for the int 15, ax=e820 memory map
- * scheme.
- *
- * In a nutshell, setup.S populates a scratch table in the
- * empty_zero_block that contains a list of usable address/size
- * duples. setup.c, this information is transferred into the e820map,
- * and in init.c/numa.c, that new information is used to mark pages
- * reserved or not.
- */
- #ifndef __E820_HEADER
- #define __E820_HEADER
- #include <linux/mmzone.h>
- #define E820MAP 0x2d0 /* our map */
- #define E820MAX 32 /* number of entries in E820MAP */
- #define E820NR 0x1e8 /* # entries in E820MAP */
- #define E820_RAM 1
- #define E820_RESERVED 2
- #define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */
- #define E820_NVS 4
- #define HIGH_MEMORY (1024*1024)
- #define LOWMEMSIZE() (0x9f000)
- #define MAXMEM (120UL * 1024 * 1024 * 1024 * 1024) /* 120TB */
- #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 {
- int nr_map;
- struct e820entry map[E820MAX];
- };
- extern unsigned long find_e820_area(unsigned long start, unsigned long end,
- unsigned size);
- extern void add_memory_region(unsigned long start, unsigned long size,
- int type);
- extern void setup_memory_region(void);
- extern void contig_e820_setup(void);
- extern void e820_end_of_ram(void);
- extern void e820_reserve_resources(void);
- extern void e820_print_map(char *who);
- extern int e820_mapped(unsigned long start, unsigned long end, int type);
- extern void e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end);
- extern void parse_mem_cmdline (char ** cmdline_p);
- extern struct e820map e820;
- #endif/*!__ASSEMBLY__*/
- #endif/*__E820_HEADER*/