Intel C2550 FH8065401488912 数据表
产品代码
FH8065401488912
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
405
Volume 2—SMBus 2.0 Unit 2 - PECI—C2000 Product Family
PECI Proxy Commands
17.7.7
RdEndPointConfig()
The RdEndPointConfig() command provides sideband read access to the PCI
configuration space that resides within the processor, as well as the SSA sideband
configuration space of each agent. The exact listing of supported devices, functions and
registers is outside the scope of this document. PECI originators can access this space
even before BIOS enumeration of the system busses. PECI originators may also
conduct a device/function/register enumeration sweep of this space by issuing reads in
the same manner that the BIOS would.
shows the RdEndPointConfig PECI
Proxy Block Write format and
shows the RdEndPointConfig
PECI Proxy Block Read format.
The following Endpoints are accessible BUNIT (0x3), PUNIT (0x4), DUNIT0 (0x10),
DUNIT1 (0x13), TUNIT (0x2).
Table 17-20. RdEndPointConfig() PECI Proxy Block Write
SMBus
Function
Value
Data
Source
Comment
Slave
Address
(Write)
Write Address
SMBus
Command
0x4C
BMC
Command
Code
PECI Mode
command code
0x62
Byte Count
N
Control Data
0x0B
Byte 1
SMBus-PECI
Handshake
Control
0x00
Value = 0x00
No AW FCS Required
Byte 2
PECI Client
Address
PECI
Command
0x30
Byte 3
PECI Write
Length
{0x07}
Byte 4
PECI Read Length
{0x02,
0x3,
0x5}
Byte 5
RdEndPointConfig
Command Code
0xC1
Use the same command for
both, i.e., RdEndPointConfig
is an alias.
Byte 6
Host ID and Retry
0x00
Byte 7
SoC Sideband
Port
0x02
0x03
0x04
0x10
0x13
0x03
0x04
0x10
0x13
Sideband Port
• 0x02 = T-Unit
• 0x03 = B-Unit
• 0x04 = P-Unit
• 0x10 = D-Unit0
• 0x13 = D-Unit1
• 0x03 = B-Unit
• 0x04 = P-Unit
• 0x10 = D-Unit0
• 0x13 = D-Unit1
All other values return an
Error.
Byte 8
Port Register
Address Byte 1
(LSB)
Any valid
register
address for
the sideband
port
Port offset
If the addressed sideband
If the addressed sideband
port register does not exist,
an Error is returned.
Byte 9
Port Register
Address Byte 2
Byte 10
Port Register
Address Byte 3
Byte 11
Port Register
Address Byte 4
(MSB)