Documentation/translations/zh_CN/arch/arm64/memory.txt
Source file repositories/reference/linux-study-clean/Documentation/translations/zh_CN/arch/arm64/memory.txt
File Facts
- System
- Linux kernel
- Corpus path
Documentation/translations/zh_CN/arch/arm64/memory.txt- Extension
.txt- Size
- 5404 bytes
- Lines
- 115
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
Chinese translated version of Documentation/arch/arm64/memory.rst
If you have any comment or update to the content, please contact the
original document maintainer directly. However, if you have a problem
communicating in English you can also ask the Chinese maintainer for
help. Contact the Chinese maintainer if this translation is outdated
or if there is a problem with the translation.
Maintainer: Catalin Marinas <catalin.marinas@arm.com>
Chinese maintainer: Fu Wei <wefu@redhat.com>
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Documentation/arch/arm64/memory.rst 的中文翻译
如果想评论或更新本文的内容,请直接联系原文档的维护者。如果你使用英文
交流有困难的话,也可以向中文版维护者求助。如果本翻译更新不及时或者翻
译存在问题,请联系中文版维护者。
本文翻译提交时的 Git 检出点为: bc465aa9d045feb0e13b4a8f32cc33c1943f62d6
英文版维护者: Catalin Marinas <catalin.marinas@arm.com>
中文版维护者: 傅炜 Fu Wei <wefu@redhat.com>
中文版翻译者: 傅炜 Fu Wei <wefu@redhat.com>
中文版校译者: 傅炜 Fu Wei <wefu@redhat.com>
以下为正文
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Linux 在 AArch64 中的内存布局
===========================
作者: Catalin Marinas <catalin.marinas@arm.com>
本文档描述 AArch64 Linux 内核所使用的虚拟内存布局。此构架可以实现
页大小为 4KB 的 4 级转换表和页大小为 64KB 的 3 级转换表。
AArch64 Linux 使用 3 级或 4 级转换表,其页大小配置为 4KB,对于用户和内核
分别都有 39-bit (512GB) 或 48-bit (256TB) 的虚拟地址空间。
对于页大小为 64KB的配置,仅使用 2 级转换表,有 42-bit (4TB) 的虚拟地址空间,但内存布局相同。
用户地址空间的 63:48 位为 0,而内核地址空间的相应位为 1。TTBRx 的
选择由虚拟地址的 63 位给出。swapper_pg_dir 仅包含内核(全局)映射,
而用户 pgd 仅包含用户(非全局)映射。swapper_pg_dir 地址被写入
TTBR1 中,且从不写入 TTBR0。
AArch64 Linux 在页大小为 4KB,并使用 3 级转换表时的内存布局:
起始地址 结束地址 大小 用途
-----------------------------------------------------------------------
0000000000000000 0000007fffffffff 512GB 用户空间
ffffff8000000000 ffffffffffffffff 512GB 内核空间
AArch64 Linux 在页大小为 4KB,并使用 4 级转换表时的内存布局:
起始地址 结束地址 大小 用途
-----------------------------------------------------------------------
0000000000000000 0000ffffffffffff 256TB 用户空间
ffff000000000000 ffffffffffffffff 256TB 内核空间
AArch64 Linux 在页大小为 64KB,并使用 2 级转换表时的内存布局:
起始地址 结束地址 大小 用途
-----------------------------------------------------------------------
0000000000000000 000003ffffffffff 4TB 用户空间
fffffc0000000000 ffffffffffffffff 4TB 内核空间
AArch64 Linux 在页大小为 64KB,并使用 3 级转换表时的内存布局:
Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.