Address translation unit (pci express)—intel, Bit default description – Intel CONTROLLERS 413808 User Manual
Page 343
Intel
®
413808 and 413812 I/O Controllers in TPER Mode
October 2007
Developer’s Manual
Order Number: 317805-001US
343
Address Translation Unit (PCI Express)—Intel
®
413808 and 413812
3.17.58 PCI Express Device Capabilities Register - PCIE_DCAP
This register identifies the capabilities and current operating mode of ATU, DMAs and
Message Unit when operating in the PCI Express mode.
Table 198. PCI Express Device Capabilities Register - PCIE_DCAP
Bit
Default
Description
31:28
00
2
Preserved
27:26
00
Captured Slot Power Limit Scale - Specifies the scale used for the Slot Power Limit Value. This value is
set when the Set_Slot_Power_Limit message is received.
25:18
00H
Captured Slot Power Limit Value - In combination with the Slot Power Limit Scale value, specifies the
upper limit on power supplied by slot. This value is set when the Set_Slot_Power_Limit message is
received.
17:16
00
Preserved
15
1
Role-Based Error Reporting - this bit is set to indicate that this device implements the Role Base Error
Reporting defined in PCI Express Base Specification, Revision 1.1.
14
0
Power Indicator Present on Device - When set, indicates that a Power Indicator is implemented on the
card or module.
13
0
Attention Indicator Preset on Device - When set, indicates that an Attention Indicator is implemented on
the card or module
12
0
Attention Button Present on Device - When set, indicates that an Attention Button is implemented on
the card or module
11:9
000
Endpoint L1 Acceptable Latency - 4138xx does not support L1 active state power management.
8:6
111
Endpoint L0 Acceptable Latency -Total acceptable latency that 4138xx can withstand due to a transition
from L0s to L0 state.
5
0
Extended Tag Field Supported - Indicates the maximum supported size of the Tag field as a Requester.
4138xx does not generate 8-bit Tags but supports 8-bit Tags as a completer.
4:3
00
Phantom Functions Supported
The ATU does not use phantom functions to extend the number of outstanding requests.
2:0
010
Max Payload Size Supported - Indicates that 4138xx can support a max payload of 512B
PCI
IOP
Attributes
Attributes
28
24
20
16
12
8
4
0
31
pr
pr
pr
pr
pr
pr
pr
pr
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
pr
pr
pr
pr
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
rw
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
Attribute Legend:
RV = Reserved
PR = Preserved
RS = Read/Set
RW = Read/Write
RC = Read Clear
RO = Read Only
NA = Not Accessible
Internal Bus Address Offset
+0D4H