1 files changed, 60 insertions, 0 deletions

diff --git a/include/asm-x86/e820_32.h b/include/asm-x86/e820_32.h
new file mode 100644
index 000000000000..cf67dbb1db79
--- /dev/null
+++ b/include/asm-x86/e820_32.h
@@ -0,0 +1,60 @@
+/*
+ * 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 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
+
+#define HIGH_MEMORY     (1024*1024)
+
+#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 struct e820map e820;
+
+extern int e820_all_mapped(unsigned long start, unsigned long end,
+                           unsigned type);
+extern int e820_any_mapped(u64 start, u64 end, unsigned type);
+extern void find_max_pfn(void);
+extern void register_bootmem_low_pages(unsigned long max_low_pfn);
+extern void e820_register_memory(void);
+extern void limit_regions(unsigned long long size);
+extern void print_memory_map(char *who);
+
+#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
+extern void e820_mark_nosave_regions(void);
+#else
+static inline void e820_mark_nosave_regions(void)
+{
+}
+#endif
+
+#endif/*!__ASSEMBLY__*/
+
+#endif/*__E820_HEADER*/