diff options
author | Tekkaman Ninja <tekkamanninja@gmail.com> | 2012-10-25 00:02:53 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-25 11:54:06 -0700 |
commit | bf34be058158fd30622601346819d098dc5d623f (patch) | |
tree | 04891bac16506ab30c542cfc07d2392bdbf301d9 | |
parent | 4bdac7b668d29dcaa53b72921b7f6a51d0f80b9b (diff) | |
download | linux-bf34be058158fd30622601346819d098dc5d623f.tar.gz linux-bf34be058158fd30622601346819d098dc5d623f.tar.bz2 linux-bf34be058158fd30622601346819d098dc5d623f.zip |
Documentation:Chinese translation of Documentation/arm64/memory.txt
This is a Chinese translated version of
Documentation/arm64/memory.txt
Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | Documentation/zh_CN/arm64/memory.txt | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/Documentation/zh_CN/arm64/memory.txt b/Documentation/zh_CN/arm64/memory.txt new file mode 100644 index 000000000000..83b519314706 --- /dev/null +++ b/Documentation/zh_CN/arm64/memory.txt @@ -0,0 +1,93 @@ +Chinese translated version of Documentation/arm64/memory.txt + +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 Contact the Chinese maintainer if this translation is outdated +or if there is a problem with the translation.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 <tekkamanninja@gmail.com> +--------------------------------------------------------------------- +Documentation/arm64/memory.txt 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。 + +英文版维护者: Catalin Marinas <catalin.marinas@arm.com> +中文版维护者: 傅炜 Fu Wei <tekkamanninja@gmail.com> +中文版翻译者: 傅炜 Fu Wei <tekkamanninja@gmail.com> +中文版校译者: 傅炜 Fu Wei <tekkamanninja@gmail.com> + +以下为正文 +--------------------------------------------------------------------- + Linux 在 AArch64 中的内存布局 + =========================== + +作者: Catalin Marinas <catalin.marinas@arm.com> +日期: 2012 年 02 月 20 日 + +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 使用页大小为 4KB 的 3 级转换表配置,对于用户和内核 +都有 39-bit (512GB) 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,但内存布局相同。 + +用户地址空间的 63:39 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_pgd_dir 地址被写入 +TTBR1 中,且从不写入 TTBR0。 + + +AArch64 Linux 内存布局: + +起始地址 结束地址 大小 用途 +----------------------------------------------------------------------- +0000000000000000 0000007fffffffff 512GB 用户空间 + +ffffff8000000000 ffffffbbfffcffff ~240GB vmalloc + +ffffffbbfffd0000 ffffffbcfffdffff 64KB [防护页] + +ffffffbbfffe0000 ffffffbcfffeffff 64KB PCI I/O 空间 + +ffffffbbffff0000 ffffffbcffffffff 64KB [防护页] + +ffffffbc00000000 ffffffbdffffffff 8GB vmemmap + +ffffffbe00000000 ffffffbffbffffff ~8GB [防护页,未来用于 vmmemap] + +ffffffbffc000000 ffffffbfffffffff 64MB 模块 + +ffffffc000000000 ffffffffffffffff 256GB 内存空间 + + +4KB 页大小的转换表查找: + ++--------+--------+--------+--------+--------+--------+--------+--------+ +|63 56|55 48|47 40|39 32|31 24|23 16|15 8|7 0| ++--------+--------+--------+--------+--------+--------+--------+--------+ + | | | | | | + | | | | | v + | | | | | [11:0] 页内偏移 + | | | | +-> [20:12] L3 索引 + | | | +-----------> [29:21] L2 索引 + | | +---------------------> [38:30] L1 索引 + | +-------------------------------> [47:39] L0 索引 (未使用) + +-------------------------------------------------> [63] TTBR0/1 + + +64KB 页大小的转换表查找: + ++--------+--------+--------+--------+--------+--------+--------+--------+ +|63 56|55 48|47 40|39 32|31 24|23 16|15 8|7 0| ++--------+--------+--------+--------+--------+--------+--------+--------+ + | | | | | + | | | | v + | | | | [15:0] 页内偏移 + | | | +----------> [28:16] L3 索引 + | | +--------------------------> [41:29] L2 索引 (仅使用 38:29 ) + | +-------------------------------> [47:42] L1 索引 (未使用) + +-------------------------------------------------> [63] TTBR0/1 |