cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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e820.h (2620B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef _UAPI_ASM_X86_E820_H
      3#define _UAPI_ASM_X86_E820_H
      4#define E820MAP	0x2d0		/* our map */
      5#define E820MAX	128		/* number of entries in E820MAP */
      6
      7/*
      8 * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
      9 * constrained space in the zeropage.  If we have more nodes than
     10 * that, and if we've booted off EFI firmware, then the EFI tables
     11 * passed us from the EFI firmware can list more nodes.  Size our
     12 * internal memory map tables to have room for these additional
     13 * nodes, based on up to three entries per node for which the
     14 * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
     15 * plus E820MAX, allowing space for the possible duplicate E820
     16 * entries that might need room in the same arrays, prior to the
     17 * call to sanitize_e820_map() to remove duplicates.  The allowance
     18 * of three memory map entries per node is "enough" entries for
     19 * the initial hardware platform motivating this mechanism to make
     20 * use of additional EFI map entries.  Future platforms may want
     21 * to allow more than three entries per node or otherwise refine
     22 * this size.
     23 */
     24
     25#ifndef __KERNEL__
     26#define E820_X_MAX E820MAX
     27#endif
     28
     29#define E820NR	0x1e8		/* # entries in E820MAP */
     30
     31#define E820_RAM	1
     32#define E820_RESERVED	2
     33#define E820_ACPI	3
     34#define E820_NVS	4
     35#define E820_UNUSABLE	5
     36#define E820_PMEM	7
     37
     38/*
     39 * This is a non-standardized way to represent ADR or NVDIMM regions that
     40 * persist over a reboot.  The kernel will ignore their special capabilities
     41 * unless the CONFIG_X86_PMEM_LEGACY option is set.
     42 *
     43 * ( Note that older platforms also used 6 for the same type of memory,
     44 *   but newer versions switched to 12 as 6 was assigned differently.  Some
     45 *   time they will learn... )
     46 */
     47#define E820_PRAM	12
     48
     49/*
     50 * reserved RAM used by kernel itself
     51 * if CONFIG_INTEL_TXT is enabled, memory of this type will be
     52 * included in the S3 integrity calculation and so should not include
     53 * any memory that BIOS might alter over the S3 transition
     54 */
     55#define E820_RESERVED_KERN        128
     56
     57#ifndef __ASSEMBLY__
     58#include <linux/types.h>
     59struct e820entry {
     60	__u64 addr;	/* start of memory segment */
     61	__u64 size;	/* size of memory segment */
     62	__u32 type;	/* type of memory segment */
     63} __attribute__((packed));
     64
     65struct e820map {
     66	__u32 nr_map;
     67	struct e820entry map[E820_X_MAX];
     68};
     69
     70#define ISA_START_ADDRESS	0xa0000
     71#define ISA_END_ADDRESS		0x100000
     72
     73#define BIOS_BEGIN		0x000a0000
     74#define BIOS_END		0x00100000
     75
     76#define BIOS_ROM_BASE		0xffe00000
     77#define BIOS_ROM_END		0xffffffff
     78
     79#endif /* __ASSEMBLY__ */
     80
     81
     82#endif /* _UAPI_ASM_X86_E820_H */