Documentation:Chinese translation of Documentation/arm64/memory.txt

PATCH In review Tekkaman Ninja 3 participants 7 messages Oct 24, 2012 – Oct 28, 2012 Documentation

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Tekkaman Ninja

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2012-10-24 16:03 UTC #0 lore raw

PATCH 1/1 Documentation:Chinese translation of Documentation/arm64/memory.txt

This is a Chinese translated version of
Documentation/arm64/memory.txt

Signed-off-by Fu Wei <[email protected]>

---
 Documentation/zh_CN/arm64/memory.txt |   93 ++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 Documentation/zh_CN/arm64/memory.txt

Documentation/zh_CN/arm64/memory.txt new file +93 -0

new file mode 100644
index 0000000..83b5193
@@ -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  Contact the Chinese maintainer if this translation is outdated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 <[email protected]>
+Chinese maintainer: Fu Wei <[email protected]>
+---------------------------------------------------------------------
+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 <[email protected]>
+中文版维护者： 傅炜  Fu Wei <[email protected]>
+中文版翻译者： 傅炜  Fu Wei <[email protected]>
+中文版校译者： 傅炜  Fu Wei <[email protected]>
+
+以下为正文
+---------------------------------------------------------------------
+		     Linux 在 AArch64 中的内存布局
+		     ===========================
+
+作者: Catalin Marinas <[email protected]>
+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

Signature · 1 line

1.7.9.5

Catalin Marinas

Acked-by on v1 1/1

2012-10-24 16:09 UTC #1 lore raw

2012/10/24 Tekkaman Ninja <[email protected]>:

Quoted 4 lines

This is a Chinese translated version of
Documentation/arm64/memory.txt
Signed-off-by Fu Wei <[email protected]>

As long as you maintain it and you keep it in sync:

Acked-by Catalin Marinas <[email protected]>

I used google translate and it seems close to the original document :)

Signature · 1 line

Catalin

Hi, Catalin
I have a question about the original document.
what is the exact meaning about the "memory" in
"ffffffc000000000 ffffffffffffffff 256GB memory"
Can I treat it as "kernel logical address space" ? Or maybe It can be modified to “kernel” ？

It's relevant to my Chinese translation.

--
Tekkaman Ninja
2012/10/25 Catalin Marinas <[email protected]>:

Quoted 14 lines

2012/10/24 Tekkaman Ninja <[email protected]>:
Quoted 4 lines
This is a Chinese translated version of
Documentation/arm64/memory.txt
Signed-off-by Fu Wei <[email protected]>
As long as you maintain it and you keep it in sync:
Acked-by Catalin Marinas <[email protected]>
I used google translate and it seems close to the original document :)
--
Catalin

Catalin Marinas

2012-10-27 15:46 UTC #3 lore raw

Quoted 5 lines · Ninja Tekkaman

I have a question about the original document.
what is the exact meaning about the "memory" in
"ffffffc000000000 ffffffffffffffff 256GB memory"
Can I treat it as "kernel logical address space" ? Or maybe It can be modified to “kernel” ？

It's the linear mapping of the RAM used by the kernel. So you could say "kernel logical memory map" (I wouldn't say address space as this is wider and it includes vmalloc, modules etc.)

Signature · 1 line

Catalin

Ninja Tekkaman

author

2012-10-28 02:39 UTC #4 lore raw

Thanks for your answer!
So I will make a patch for it (in English and Chinese). For English patch ,if you like it, please acked it.

2012/10/27 Catalin Marinas <[email protected]>:

Quoted 13 lines · Ninja Tekkaman

Quoted 5 lines
I have a question about the original document.
what is the exact meaning about the "memory" in
"ffffffc000000000 ffffffffffffffff 256GB memory"
Can I treat it as "kernel logical address space" ? Or maybe It can be modified to “kernel” ？
It's the linear mapping of the RAM used by the kernel. So you could say "kernel logical memory map" (I wouldn't say address space as this is wider and it includes vmalloc, modules etc.)
--
Catalin

Ninja Tekkaman

author

2012-10-27 05:14 UTC #5 lore raw

In reply to Catalin Marinas

Once I realized that the original document have been updated, I will update that translation immediately.

2012/10/25 Catalin Marinas <[email protected]>:

Quoted 14 lines

2012/10/24 Tekkaman Ninja <[email protected]>:
Quoted 4 lines
This is a Chinese translated version of
Documentation/arm64/memory.txt
Signed-off-by Fu Wei <[email protected]>
As long as you maintain it and you keep it in sync:
Acked-by Catalin Marinas <[email protected]>
I used google translate and it seems close to the original document :)
--
Catalin

harryxiyou

Acked-by on v1 1/1

2012-10-26 15:51 UTC #6 lore raw

In reply to Tekkaman Ninja

2012/10/25 Tekkaman Ninja <[email protected]>:

Quoted 5 lines

This is a Chinese translated version of
Documentation/arm64/memory.txt
Signed-off-by Fu Wei <[email protected]>

Acked-by Harry Wei <[email protected]>

Thanks for your good job ;-)

Signature · 2 lines

Thanks
Harry Wei