Documentation\cpu-freq\amd-powernow.txt

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Documentation\cpu-freq\amd-powernow.txt 的中文翻译

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PowerNow! and Cool'n'Quiet are AMD names for frequency

management capabilities in AMD processors. As the hardware

implementation changes in new generations of the processors,

there is a different cpu-freq driver for each generation.

Note that the driver's will not load on the "wrong" hardware,

so it is safe to try each driver in turn when in doubt as to

which is the correct driver.

PowerNow和Cool'n'Quiet是AMD的名字因为

在AMD处理器中超频率的管理能力。因为硬件

的实现改变着新一代的处理器，

有一个不同的CPU频率驱动着每一代。

值得注意的是，驱动将不会加载在“错误”的硬件上，

所以它是安全的依次尝试每一个驱动程序，

当对哪一个是正确的驱动程序有疑问时。

Note that the functionality to change frequency (and voltage)

is not available in all processors. The drivers will refuse

to load on processors without this capability. The capability

is detected with the cpuid instruction.

The drivers use BIOS supplied tables to obtain frequency and

voltage information appropriate for a particular platform.

Frequency transitions will be unavailable if the BIOS does

not supply these tables.

6th Generation: powernow-k6

7th Generation: powernow-k7: Athlon, Duron, Geode.

注意，改变频率的功能（电压）

不是在所有的处理器上都可用的。驱动器如果没有这种能力

将拒绝在处理器上加载。能力

与CPUID指令检测相联系。

这些驱动程序使用BIOS提供的表去得到频率和

适合特定的平台的电压信息。

频率转换将不可用如果BIOS

不提供这些表。

第六代：powernow-k6

第七代：powernow-k7：Athlon, Duron, Geode.。

8th Generation: powernow-k8: Athlon, Athlon 64, Opteron, Sempron.

Documentation on this functionality in 8th generation processors

is available in the "BIOS and Kernel Developer's Guide", publication

26094, in chapter 9, available for download from
www.amd.com.

BIOS supplied data, for powernow-k7 and for powernow-k8, may be

from either the PSB table or from ACPI objects. The ACPI support

is only available if the kernel config sets CONFIG_ACPI_PROCESSOR.

The powernow-k8 driver will attempt to use ACPI if so configured,

and fall back to PST if that fails.

The powernow-k7 driver will try to use the PSB support first, and

fall back to ACPI if the PSB support fails. A module parameter,

acpi_force, is provided to force ACPI support to be used instead

of PSB support.

第八代：powernow-k8：Athlon, Athlon 64, Opteron, Sempron.

第八代处理器对这个功能的文档

在《BIOS和内核开发者指南》，出版

26094，第9章中，www.amd.com可供下载。

BIOS提供的数据，对powernow-k7和powernow-k8，可能

来自PSB表或ACPI对象。ACPI

只有当内核配置设置config_acpi_processor才支持。

powernow-k8驱动程序将试图这样配置使用ACPI，

如果失败，返回到PST。

powernow-k7驱动程序将首先尝试使用PSB支持，并且

如果PSB支持失败回到ACPI。一个模块的参数，

acpi_force，提供给力的ACPI支持可用于代替

PSB的支持。