Datasheet

Functional Description
172 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
4. The Region section points to the three other regions as well as the size of each
region.
5. The master region contains the security settings for the flash, granting read/write
permissions for each region and identifying each master by a requestor ID. See
Section 3.23.2.1 for more information.
6. The processor and Intel® Xeon® Processor D-1500 Product Family soft strap
sections contain processor and Intel® Xeon® Processor D-1500 Product Family
configurable parameters.
7. (same as 6) The processor and Intel® Xeon® Processor D-1500 Product Family
soft strap sections contain processor and Intel® Xeon® Processor D-1500 Product
Family configurable parameters.
8. The Reserved region between the top of the processor strap section and the bottom
of the OEM Section is reserved for future chipset usages.
9. The Descriptor Upper MAP determines the length and base address of the
Management Engine VSCC Table.
10. The Management Engine VSCC Table holds the JEDEC ID and the VSCC information
of the entire SPI Flash supported by the NVM image.
11. OEM Section is 256 Bytes reserved at the top of the Flash Descriptor for use
by OEM.
3.23.2.1 Descriptor Master Region
The master region defines read and write access setting for each region of the SPI
device. The master region recognizes three masters: BIOS, Gigabit Ethernet, and
Management Engine. Each master is only allowed to do direct reads of its primary
regions.
3.23.3 Flash Access
There are two types of flash accesses:
Direct Access:
• Masters are allowed to do direct read only of their primary region
Table 3-52. Region Access Control Table
Master Read/Write Access
Region Processor and BIOS Intel
®
ME GbE Controller
Descriptor N/A N/A N/A
BIOS Processor and BIOS can
always read from and
write to BIOS Region
Read / Write Read / Write
Management Engine Read / Write Intel
®
ME can always
read from and write to
Intel ME Region
Read / Write
Gigabit Ethernet Read / Write Read / Write GbE software can always
read from and write to
GbE region
Platform Data Region N/A N/A N/A