patch-2.2.19 linux/include/asm-i386/e820.h

• Lines: 41
• Date: Sun Mar 25 11:37:39 2001
• Orig file: v2.2.18/include/asm-i386/e820.h
• Orig date: Wed Dec 31 19:00:00 1969

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.18/include/asm-i386/e820.h linux/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*/