IBM Intel Xeon X7350 44E4243 Data Sheet
Product codes
44E4243
Document Number: 318080-002
119
Features
7.4.3
Processor Information ROM (PIROM)
The lower half (128 bytes) of the SMBus memory component is an electrically
programmed read-only memory with information about the processor. This information
is permanently write-protected.
programmed read-only memory with information about the processor. This information
is permanently write-protected.
provides the formats of the data fields included in the Processor Information ROM
(PIROM).
(PIROM).
The PIROM consists of the following sections:
• Header
• Processor Data
• Processor Core Data
• Cache Data
• Package Data
• Part Number Data
• Thermal Reference Data
• Feature Data
• Other Data
• Processor Data
• Processor Core Data
• Cache Data
• Package Data
• Part Number Data
• Thermal Reference Data
• Feature Data
• Other Data
Table 7-6.
Processor Information ROM Data Sections (Sheet 1 of 3)
Offset/Section
# of
Bits
Function
Notes
Header:
00h
8
Data Format Revision
Two 4-bit hex digits
01 - 02h
16
PIROM Size
Size in bytes (MSB first)
03h
8
Processor Data Address
Byte pointer, 00h if not present
04h
8
Processor Core Data
Address
Byte pointer, 00h if not present
05h
8
L3 Cache Data Address
Byte pointer, 00h if not present
06h
8
Package Data Address
Byte pointer, 00h if not present
07h
8
Part Number Data Address
Byte pointer, 00h if not present
08h
8
Thermal Reference Data
Address
Byte pointer, 00h if not present
09h
8
Feature Data Address
Byte pointer, 00h if not present
0Ah
8
Other Data Address
Byte pointer, 00h if not present
0B - 0Ch
16
Reserved
Reserved
0Dh
8
Checksum
1 byte checksum
Processor Data:
0E - 13h
48
S-spec Number
Six 8-bit ASCII characters
14h
6
2
2
Reserved
Sample/Production
Reserved (most significant bits)
00b = Sample, 01b = Production
15h
8
Checksum
1 byte checksum
Processor Core
Data:
16 - 19h
2
Reserved
Reserved for future use
8
Extended Family
From CPUID
4
Extended Model
From CPUID