patch-2.4.20 linux-2.4.20/include/asm-x86_64/e820.h

• Lines: 63
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/e820.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/e820.h linux-2.4.20/include/asm-x86_64/e820.h
@@ -0,0 +1,62 @@
+/*
+ * 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)
+
+#define MAXMEM		(120UL * 1024 * 1024 * 1024 * 1024)  /* 120TB */ 
+
+
+#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 void 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, int type);
+
+extern void e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end);
+
+extern void parse_mem_cmdline (char ** cmdline_p);
+
+extern struct e820map e820;
+#endif/*!__ASSEMBLY__*/
+
+#endif/*__E820_HEADER*/