83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
||
|
|
#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 */
|