include/e820.h

#ifndef BIOS_E820_H
#define BIOS_E820_H

#define SMAP    0x534d4150	/* ASCII "SMAP" */

#define E820_RAM	1
#define E820_RESERVED	2
#define E820_ACPI	3
#define E820_NVS	4
#define E820_UNUSABLE	5


/*
 * 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

struct e820entry {
	uint64_t addr;	/* start of memory segment */
	uint64_t size;	/* size of memory segment */
	uint32_t type;	/* type of memory segment */
} __attribute__((packed));

struct e820map {
	uint32_t nr_map;
	struct e820entry map[];
};

extern struct e820map *e820;

#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 /* BIOS_E820_H */