e820.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * 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 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)
- #ifndef __ASSEMBLY__
- struct e820map {
- int nr_map;
- struct e820entry {
- unsigned long long addr; /* start of memory segment */
- unsigned long long size; /* size of memory segment */
- unsigned long type; /* type of memory segment */
- } map[E820MAX];
- };
- extern struct e820map e820;
- #endif/*!__ASSEMBLY__*/
- #endif/*__E820_HEADER*/