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Intel

EP80579 Software Drivers for Embedded Applications on FreeBSD*

September 2009 GSG

Order Number: 320152-005US 31

Pre-boot (BIOS) Firmware—EP80579 Integrated Processor

The default setting in the BIOS is 400 MHz. If a higher speed memory DIMM is inserted

into the development board, the corresponding memory speed must be selected in the

BIOS Setup Menu to support the intended speed. Otherwise, the memory is reduced to

the default of 400 MHz.

6.1.4 Coherent and Non-Coherent Memory Allocation

The development board supports allocation of memory regions for coherent and non-

coherent use. Coherent and non-coherent memory use features are for development

boards that use the Intel

EP80579 Integrated Processor with Intel

QuickAssist

Technology. Intel

EP80579 Integrated Processors (without Intel

QuickAssist

Technology) do not make use of the memory set aside for these features. Therefore, it

is recommended that the settings for coherent and non-coherent usage be set to zero

so that no memory is allocated to these features.

Enter the BIOS Setup Menu and select the Chipset tab. Select North bridge, and

navigate down towards the bottom to the Coherent Mem Size option and press Enter to

select this option. A dialog box is displayed prompting the user to enter a value. Type

the numerical value zero, “0”, and press Enter. Navigate to the next option, Non-

Coherent Mem Size, and press Enter to select this option. A dialog box is displayed

prompting the user to enter a value. Again, type the numerical value zero, “0”, and

press enter. These selections override the BIOS default settings and allocate no

memory regions for these two features.

Note: This software package requires the pre-boot firmware (BIOS) for your hardware to

allocate the values for each region called out in Table 5. For more information on these

regions, refer to the Intel

EP80579 Integrated Processor Product Line Datasheet,

Section 3.0.

6.1.5 Legacy and AHCI SATA Mode

The development board supports hard drives in legacy SATA mode and in Advanced

Host Controller Interface (AHCI) mode. AHCI mode provides advanced capabilities and

improved performance, provided the hard drive supports the following features:

•Hot Plug

• Native Command Queuing

• Speeds up to 3 Gb/s

Refer to the Serial ATA Organization web site for more information:

http://www.serialata.org/

The development board pre-boot firmware (BIOS) can be configured in either Legacy or

AHCI mode as desired. The BIOS defaults to Legacy mode because not all hard drives

support AHCI. To toggle the BIOS to either Legacy or AHCI mode, proceed as follows:

1. Press the <Del> key during POST to enter the pre-boot firmware setup menu.

2. Use the arrow keys to navigate to the Advanced menu.

Table 5. Memory Allocation Settings

Datasheet

name

Software

name

Region

Size

IA/ASU Shared

(Coherent)

CDRAM 0

IA/ASU Shared

(AIOC-Direct)

NCDRAM 0

1 2 ... 26 27 28 29 30 31 32 33 34 35 36

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