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Diffstat (limited to 'include/asm-x86/e820_64.h')
| -rw-r--r-- | include/asm-x86/e820_64.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/asm-x86/e820_64.h b/include/asm-x86/e820_64.h new file mode 100644 index 00000000000..3486e701bd8 --- /dev/null +++ b/include/asm-x86/e820_64.h @@ -0,0 +1,61 @@ +/* + * 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 + +#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 + +#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 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 unsigned long e820_end_of_ram(void); +extern void e820_reserve_resources(void); +extern void e820_mark_nosave_regions(void); +extern void e820_print_map(char *who); +extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type); +extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type); +extern unsigned long e820_hole_size(unsigned long start, unsigned long end); + +extern void e820_setup_gap(void); +extern void e820_register_active_regions(int nid, + unsigned long start_pfn, unsigned long end_pfn); + +extern void finish_e820_parsing(void); + +extern struct e820map e820; + +extern unsigned ebda_addr, ebda_size; +extern unsigned long nodemap_addr, nodemap_size; +#endif/*!__ASSEMBLY__*/ + +#endif/*__E820_HEADER*/ |