Intel PCH-LP, Programming Manual

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Flash Image Tool
• Descriptor: Takes up a fixed amount of space at the beginning of flash memory.
The descriptor contains information such as space allocated for each region of the
flash image, read-write permissions for each region, and a space which can be used
for vendor-specific data.
• ME: Required region that contains code and configuration data for Intel
®
ME
functions such as Intel
®
ME Clock control, Intel
®
AMT, etc.
• GbE: Optional region that contains code and configuration data for Intel integrated
Gigabit Ethernet and 10/100 Ethernet.
• Platform Data Region: Optional region that contains data reserved for BIOS/Host
usage.
• BIOS: Optional region that contains code and configuration for the entire platform.
Region is only optional if BIOS is on Firmware Hub.
7.1.1 Flash Space Allocation
FITC allocates SPI flash space allocation for each region as follows:
1. Each region can be assigned a fixed amount of space. If no fixed space is assigned,
then the region occupies only as much space as it requires.
2. If after allocation for all regions there is still space left in flash, then the ME region
expands to fill the remaining space.
3. If there is leftover space and the ME region is not implemented, then the BIOS
region is expands to use the remaining space.
If there is leftover space and the BIOS region is not implemented, then the GbE region
is expands to contain the remaining space.
7.2 Modifying the Flash Descriptor Region
The flash descriptor region contains information about the flash image and the target
hardware. It is important for this region to be configured correctly or else the target
system my not function as desired.
7.2.1 Setting the Number and Size of the Flash Components
To set the number of flash components, expand the “Descriptor Region” node in the
tree on the left side of the main window. Then, select the “Descriptor Map” node (See
Figure 7-
386H
3). All of the parameters for the descriptor map section will appear in the list
on the right side of the main window.