1 files changed, 59 insertions, 0 deletions

diff --git a/include/asm-x86_64/e820.h b/include/asm-x86_64/e820.h
new file mode 100644
index 000000000000..5b376e42b153
--- /dev/null
+++ b/include/asm-x86_64/e820.h
@@ -0,0 +1,59 @@
+/*
+ * 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)
+
+#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 unsigned long 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, unsigned type);
+
+extern void e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end);
+
+extern void __init parse_memopt(char *p, char **end);
+
+extern struct e820map e820;
+#endif/*!__ASSEMBLY__*/
+
+#endif/*__E820_HEADER*/