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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_X86_E820_H
#define _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.
 */

#define E820_X_MAX E820MAX

#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 /* _ASM_X86_E820_H */

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⬅ include 64 item

Nama	Tipe	Ukuran	Diubah	Aksi
📄a.out.h	h	756 B	2026-03-24 10:01	✏️ 👁️
📄amd_hsmp.h	h	11.3 KB	2026-03-24 10:01	✏️ 👁️
📄auxvec.h	h	546 B	2026-03-24 10:01	✏️ 👁️
📄bitsperlong.h	h	321 B	2026-03-24 10:01	✏️ 👁️
📄boot.h	h	323 B	2026-03-24 10:01	✏️ 👁️
📄bootparam.h	h	8.3 KB	2026-03-24 10:01	✏️ 👁️
📄bpf_perf_event.h	h	40 B	2026-03-24 10:01	✏️ 👁️
📄byteorder.h	h	200 B	2026-03-24 10:01	✏️ 👁️
📄debugreg.h	h	3.3 KB	2026-03-24 10:01	✏️ 👁️
📄e820.h	h	2.5 KB	2026-03-24 10:01	✏️ 👁️
📄errno.h	h	31 B	2026-03-24 10:01	✏️ 👁️
📄fcntl.h	h	31 B	2026-03-24 10:01	✏️ 👁️
📄hw_breakpoint.h	h	69 B	2026-03-24 10:01	✏️ 👁️
📄hwcap2.h	h	324 B	2026-03-24 10:01	✏️ 👁️
📄ioctl.h	h	31 B	2026-03-24 10:01	✏️ 👁️
📄ioctls.h	h	32 B	2026-03-24 10:01	✏️ 👁️
📄ipcbuf.h	h	32 B	2026-03-24 10:01	✏️ 👁️
📄ist.h	h	854 B	2026-03-24 10:01	✏️ 👁️
📄kvm.h	h	22.3 KB	2026-03-24 10:01	✏️ 👁️
📄kvm_para.h	h	4.2 KB	2026-03-24 10:01	✏️ 👁️
📄kvm_perf.h	h	388 B	2026-03-24 10:01	✏️ 👁️
📄ldt.h	h	1.3 KB	2026-03-24 10:01	✏️ 👁️
📄mce.h	h	1.7 KB	2026-03-24 10:01	✏️ 👁️
📄mman.h	h	413 B	2026-03-24 10:01	✏️ 👁️
📄msgbuf.h	h	1.1 KB	2026-03-24 10:01	✏️ 👁️
📄msr.h	h	346 B	2026-03-24 10:01	✏️ 👁️
📄mtrr.h	h	3.9 KB	2026-03-24 10:01	✏️ 👁️
📄param.h	h	31 B	2026-03-24 10:01	✏️ 👁️
📄perf_regs.h	h	1.4 KB	2026-03-24 10:01	✏️ 👁️
📄poll.h	h	30 B	2026-03-24 10:01	✏️ 👁️
📄posix_types.h	h	224 B	2026-03-24 10:01	✏️ 👁️
📄posix_types_32.h	h	765 B	2026-03-24 10:01	✏️ 👁️
📄posix_types_64.h	h	609 B	2026-03-24 10:01	✏️ 👁️
📄posix_types_x32.h	h	581 B	2026-03-24 10:01	✏️ 👁️
📄prctl.h	h	1.1 KB	2026-03-24 10:01	✏️ 👁️
📄processor-flags.h	h	7 KB	2026-03-24 10:01	✏️ 👁️
📄ptrace-abi.h	h	2 KB	2026-03-24 10:01	✏️ 👁️
📄ptrace.h	h	1.5 KB	2026-03-24 10:01	✏️ 👁️
📄resource.h	h	34 B	2026-03-24 10:01	✏️ 👁️
📄sembuf.h	h	1 KB	2026-03-24 10:01	✏️ 👁️
📄setup.h	h	6 B	2026-03-24 10:01	✏️ 👁️
📄sgx.h	h	8.1 KB	2026-03-24 10:01	✏️ 👁️
📄shmbuf.h	h	1.3 KB	2026-03-24 10:01	✏️ 👁️
📄sigcontext.h	h	9.5 KB	2026-03-24 10:01	✏️ 👁️
📄sigcontext32.h	h	271 B	2026-03-24 10:01	✏️ 👁️
📄siginfo.h	h	422 B	2026-03-24 10:01	✏️ 👁️
📄signal.h	h	2 KB	2026-03-24 10:01	✏️ 👁️
📄socket.h	h	32 B	2026-03-24 10:01	✏️ 👁️
📄sockios.h	h	33 B	2026-03-24 10:01	✏️ 👁️
📄stat.h	h	3.1 KB	2026-03-24 10:01	✏️ 👁️
📄statfs.h	h	416 B	2026-03-24 10:01	✏️ 👁️
📄svm.h	h	9.7 KB	2026-03-24 10:01	✏️ 👁️
📄swab.h	h	724 B	2026-03-24 10:01	✏️ 👁️
📄termbits.h	h	34 B	2026-03-24 10:01	✏️ 👁️
📄termios.h	h	33 B	2026-03-24 10:01	✏️ 👁️
📄types.h	h	31 B	2026-03-24 10:01	✏️ 👁️
📄ucontext.h	h	2.1 KB	2026-03-24 10:01	✏️ 👁️
📄unistd.h	h	623 B	2026-03-24 10:01	✏️ 👁️
📄unistd_32.h	h	11.8 KB	2026-03-24 10:01	✏️ 👁️
📄unistd_64.h	h	9.7 KB	2026-03-24 10:01	✏️ 👁️
📄unistd_x32.h	h	17.1 KB	2026-03-24 10:01	✏️ 👁️
📄vm86.h	h	3.1 KB	2026-03-24 10:01	✏️ 👁️
📄vmx.h	h	7.4 KB	2026-03-24 10:01	✏️ 👁️
📄vsyscall.h	h	263 B	2026-03-24 10:01	✏️ 👁️

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