x86/boot/e820: Introduce arch/x86/include/asm/e820/types.h

 * E820_X_MAX is the maximum size of the extended E820 table.  The extended

 * table may contain up to 3 extra E820 entries per possible NUMA node, so we

 * make room for 3 * MAX_NUMNODES possible entries, beyond the standard 128.

 * Also note that E820_X_MAX *must* be defined before we include uapi/asm/e820.h.

 * Also note that E820_X_MAX *must* be defined before we include asm/e820/types.h.

 */

#include <linux/numa.h>

#define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES)

#include <uapi/asm/e820.h>

#include <asm/e820/types.h>

#ifndef __ASSEMBLY__

/* see comment in arch/x86/kernel/e820.c */

#ifndef _UAPI_ASM_X86_E820_H

#define _UAPI_ASM_X86_E820_H

#define E820MAP	0x2d0		/* our map */

#define E820MAX	128		/* number of entries in E820MAP */

/*

 * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the

 * constrained space in the zeropage.  If we have more nodes than

 * that, and if we've booted off EFI firmware, then the EFI tables

 * passed us from the EFI firmware can list more nodes.  Size our

 * internal memory map tables to have room for these additional

 * nodes, based on up to three entries per node for which the

 * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),

 * plus E820MAX, allowing space for the possible duplicate E820

 * entries that might need room in the same arrays, prior to the

 * call to sanitize_e820_map() to remove duplicates.  The allowance

 * of three memory map entries per node is "enough" entries for

 * the initial hardware platform motivating this mechanism to make

 * use of additional EFI map entries.  Future platforms may want

 * to allow more than three entries per node or otherwise refine

 * this size.

 */

#ifndef __KERNEL__

#define E820_X_MAX E820MAX

#endif

#define E820NR	0x1e8		/* # entries in E820MAP */

#define E820_RAM	1

#define E820_RESERVED	2

#define E820_ACPI	3

#define E820_NVS	4

#define E820_UNUSABLE	5

#define E820_PMEM	7

/*

 * This is a non-standardized way to represent ADR or NVDIMM regions that

 * persist over a reboot.  The kernel will ignore their special capabilities

 * unless the CONFIG_X86_PMEM_LEGACY option is set.

 *

 * ( Note that older platforms also used 6 for the same type of memory,

 *   but newer versions switched to 12 as 6 was assigned differently.  Some

 *   time they will learn... )

 */

#define E820_PRAM	12

/*

 * reserved RAM used by kernel itself

 * if CONFIG_INTEL_TXT is enabled, memory of this type will be

 * included in the S3 integrity calculation and so should not include

 * any memory that BIOS might alter over the S3 transition

 */

#define E820_RESERVED_KERN        128

#ifndef __ASSEMBLY__

#include <linux/types.h>

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[E820_X_MAX];

};

#define ISA_START_ADDRESS	0xa0000

#define ISA_END_ADDRESS		0x100000

#define BIOS_BEGIN		0x000a0000

#define BIOS_END		0x00100000

#define BIOS_ROM_BASE		0xffe00000

#define BIOS_ROM_END		0xffffffff

#endif /* __ASSEMBLY__ */

#endif /* _UAPI_ASM_X86_E820_H */