1 files changed, 40 insertions, 0 deletions

diff --git a/include/asm-i386/e820.h b/include/asm-i386/e820.h
new file mode 100644
index 000000000000..5c285aee7294
--- /dev/null
+++ b/include/asm-i386/e820.h
@@ -0,0 +1,40 @@
+/*
+ * 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*/