JFIF$        dd7 

Viewing File: /usr/src/kernels/5.14.0-570.30.1.el9_6.x86_64/arch/x86/include/asm/e820/types.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_E820_TYPES_H
#define _ASM_E820_TYPES_H

#include <uapi/asm/bootparam.h>

/*
 * These are the E820 types known to the kernel:
 */
enum e820_type {
	E820_TYPE_RAM		= 1,
	E820_TYPE_RESERVED	= 2,
	E820_TYPE_ACPI		= 3,
	E820_TYPE_NVS		= 4,
	E820_TYPE_UNUSABLE	= 5,
	E820_TYPE_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=y 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... )
	 */
	E820_TYPE_PRAM		= 12,

	/*
	 * Special-purpose memory is indicated to the system via the
	 * EFI_MEMORY_SP attribute. Define an e820 translation of this
	 * memory type for the purpose of reserving this range and
	 * marking it with the IORES_DESC_SOFT_RESERVED designation.
	 */
	E820_TYPE_SOFT_RESERVED	= 0xefffffff,

	/*
	 * Reserved RAM used by the kernel itself if
	 * CONFIG_INTEL_TXT=y is enabled, memory of this type
	 * will be included in the S3 integrity calculation
	 * and so should not include any memory that the BIOS
	 * might alter over the S3 transition:
	 */
	E820_TYPE_RESERVED_KERN	= 128,
};

/*
 * A single E820 map entry, describing a memory range of [addr...addr+size-1],
 * of 'type' memory type:
 *
 * (We pack it because there can be thousands of them on large systems.)
 */
struct e820_entry {
	u64			addr;
	u64			size;
	enum e820_type		type;
} __attribute__((packed));

/*
 * The legacy E820 BIOS limits us to 128 (E820_MAX_ENTRIES_ZEROPAGE) nodes
 * due to the constrained space in the zeropage.
 *
 * On large systems we can easily have thousands of nodes with RAM,
 * which cannot be fit into so few entries - so we have a mechanism
 * to extend the e820 table size at build-time, via the E820_MAX_ENTRIES
 * define below.
 *
 * ( Those extra entries are enumerated via the EFI memory map, not
 *   via the legacy zeropage mechanism. )
 *
 * Size our internal memory map tables to have room for these additional
 * entries, based on a heuristic calculation: up to three entries per
 * NUMA node, plus E820_MAX_ENTRIES_ZEROPAGE for some extra space.
 *
 * This allows for bootstrap/firmware quirks such as possible duplicate
 * E820 entries that might need room in the same arrays, prior to the
 * call to e820__update_table() 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.
 */

#include <linux/numa.h>

#define E820_MAX_ENTRIES	(E820_MAX_ENTRIES_ZEROPAGE + 3*MAX_NUMNODES)

/*
 * The whole array of E820 entries:
 */
struct e820_table {
	__u32 nr_entries;
	struct e820_entry entries[E820_MAX_ENTRIES];
};

/*
 * Various well-known legacy memory ranges in physical memory:
 */
#define ISA_START_ADDRESS	0x000a0000
#define ISA_END_ADDRESS		0x00100000

#define BIOS_BEGIN		0x000a0000
#define BIOS_END		0x00100000

#define HIGH_MEMORY		0x00100000

#define BIOS_ROM_BASE		0xffe00000
#define BIOS_ROM_END		0xffffffff

#endif /* _ASM_E820_TYPES_H */
Back to Directory  nL+D550H?Mx ,D"v]qv;6*Zqn)ZP0!1 A "#a$2Qr D8 a Ri[f\mIykIw0cuFcRı?lO7к_f˓[C$殷WF<_W ԣsKcëIzyQy/_LKℂ;C",pFA:/]=H  ~,ls/9ć:[=/#f;)x{ٛEQ )~ =𘙲r*2~ a _V=' kumFD}KYYC)({ *g&f`툪ry`=^cJ.I](*`wq1dđ#̩͑0;H]u搂@:~וKL Nsh}OIR*8:2 !lDJVo(3=M(zȰ+i*NAr6KnSl)!JJӁ* %݉?|D}d5:eP0R;{$X'xF@.ÊB {,WJuQɲRI;9QE琯62fT.DUJ;*cP A\ILNj!J۱+O\͔]ޒS߼Jȧc%ANolՎprULZԛerE2=XDXgVQeӓk yP7U*omQIs,K`)6\G3t?pgjrmۛجwluGtfh9uyP0D;Uڽ"OXlif$)&|ML0Zrm1[HXPlPR0'G=i2N+0e2]]9VTPO׮7h(F*癈'=QVZDF,d߬~TX G[`le69CR(!S2!P <0x<!1AQ "Raq02Br#SCTb ?Ζ"]mH5WR7k.ۛ!}Q~+yԏz|@T20S~Kek *zFf^2X*(@8r?CIuI|֓>^ExLgNUY+{.RѪ τV׸YTD I62'8Y27'\TP.6d&˦@Vqi|8-OΕ]ʔ U=TL8=;6c| !qfF3aů&~$l}'NWUs$Uk^SV:U# 6w++s&r+nڐ{@29 gL u"TÙM=6(^"7r}=6YݾlCuhquympǦ GjhsǜNlɻ}o7#S6aw4!OSrD57%|?x>L |/nD6?/8w#[)L7+6〼T ATg!%5MmZ/c-{1_Je"|^$'O&ޱմTrb$w)R$& N1EtdU3Uȉ1pM"N*(DNyd96.(jQ)X 5cQɎMyW?Q*!R>6=7)Xj5`J]e8%t!+'!1Q5 !1 AQaqё#2"0BRb?Gt^## .llQT $v,,m㵜5ubV =sY+@d{N! dnO<.-B;_wJt6;QJd.Qc%p{ 1,sNDdFHI0ГoXшe黅XۢF:)[FGXƹ/w_cMeD,ʡcc.WDtA$j@:) -# u c1<@ۗ9F)KJ-hpP]_x[qBlbpʖw q"LFGdƶ*s+ډ_Zc"?%t[IP 6J]#=ɺVvvCGsGh1 >)6|ey?Lӣm,4GWUi`]uJVoVDG< SB6ϏQ@ TiUlyOU0kfV~~}SZ@*WUUi##; s/[=!7}"WN]'(L! ~y5g9T̅JkbM' +s:S +B)v@Mj e Cf jE 0Y\QnzG1д~Wo{T9?`Rmyhsy3!HAD]mc1~2LSu7xT;j$`}4->L#vzŏILS ֭T{rjGKC;bpU=-`BsK.SFw4Mq]ZdHS0)tLg