| /* |
| * structures and definitions for the int 15, ax=e820 memory map |
| * scheme. |
| * |
| * In a nutshell, arch/x86_64/boot/setup.S populates a scratch table |
| * in the empty_zero_block that contains a list of usable address/size |
| * duples. In arch/x86_64/kernel/setup.c, this information is |
| * transferred into the e820map, and in arch/i386/x86_64/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 { |
| u64 addr __attribute__((packed)); /* start of memory segment */ |
| u64 size __attribute__((packed)); /* size of memory segment */ |
| u32 type __attribute__((packed)); /* type of memory segment */ |
| } map[E820MAX]; |
| }; |
| |
| extern struct e820map e820; |
| #endif/*!__ASSEMBLY__*/ |
| |
| #endif/*__E820_HEADER*/ |
