[PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Tekkaman Ninja]

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

Signed-off-by: Fu Wei <tekkamanninja@gmail.com>

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

diff --git a/Documentation/zh_CN/arm64/memory.txt b/Documentation/zh_CN/arm64/memory.txt
new file mode 100644
index 0000000..83b5193
--- /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  Contact the Chinese maintainer if this translation is outdated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
-- 
1.7.9.5

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Catalin Marinas]

2012/10/24 Tekkaman Ninja <tekkamanninja@gmail.com>:
> This is a Chinese translated version of
> Documentation/arm64/memory.txt
>
> Signed-off-by: Fu Wei <tekkamanninja@gmail.com>

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

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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

-- 
Catalin

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[harryxiyou]

2012/10/25 Tekkaman Ninja <tekkamanninja@gmail.com>:
> This is a Chinese translated version of
> Documentation/arm64/memory.txt
>
> Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
>

Acked-by: Harry Wei <harryxiyou@gmail.com>

Thanks for your good job ;-)

-- 
Thanks
Harry Wei

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Ninja Tekkaman]

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 <catalin.marinas@arm.com>:
> 2012/10/24 Tekkaman Ninja <tekkamanninja@gmail.com>:
>> This is a Chinese translated version of
>> Documentation/arm64/memory.txt
>>
>> Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
>
> As long as you maintain it and you keep it in sync:
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>
> I used google translate and it seems close to the original document :)
>
> --
> Catalin

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Ninja Tekkaman]

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

2012/10/25 Catalin Marinas <catalin.marinas@arm.com>:
> 2012/10/24 Tekkaman Ninja <tekkamanninja@gmail.com>:
>> This is a Chinese translated version of
>> Documentation/arm64/memory.txt
>>
>> Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
>
> As long as you maintain it and you keep it in sync:
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>
> I used google translate and it seems close to the original document :)
>
> --
> Catalin

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Catalin Marinas]

On 27 October 2012 06:11, Ninja Tekkaman <tekkamanninja@gmail.com> wrote:
> 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

Re: [PATCH]Documentation:Chinese translation of Documentation/arm64/memory.txt

[Ninja Tekkaman]

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 <catalin.marinas@arm.com>:
> On 27 October 2012 06:11, Ninja Tekkaman <tekkamanninja@gmail.com> wrote:
>> 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