Datasheet

Datasheet, Volume 2 131

Processor Integrated I/O (IIO) Configuration Registers
27:26 RW 0b
Request or Completion Packet Selection
x1 = Request packet
1x = Completion packet
11 = Either
25:24 RW 0b
Read or Write Selection
x1 = Read
1x = Write
11 = Either
23:22 RW 0b
Completion Required
x1 = No completion required
1x = Completion required
11 = Either
21:20 RW 0b
Lock Attribute Selection
x1 = No lock
1x = Lock
11 = Either
19:18 RW 0b
Extended Addressing Header
x1 = 32b addressing
1x = 64b addressing
11 = Either
17:16 RW 0b
Configuration Type
x1 = Type
01x = Type 1
11 = Either
15:11 RW 0h
Transaction Type Encoding
1_xxxx = Trusted
x_1xxx: Memory
x_x1xx: IO
x_xx1x: Configuration
x_xxx1: Messages
1_1111: Any transaction type
10:4 RW 0h
Data Length
1xx_xxxx = (129 to 256 bytes)
x1x_xxxx = (65 to 128 bytes)
xx1_xxxx = (33 to 64 bytes)
xxx_1xxx = (17 to 32 bytes)
xxx_x1xx = (9 to 16 bytes)
xxx_xx1x = (0 to 8 bytes)
xxx_xxx1 = 0 bytes, used for a special zero length encoded packets
111_1111 = Any Data length
3:0 RW 0b
Completion Status.
1xxx = Completer abortx
1xx = Configuration request retry status (only used for inbound completions)
xx1x = Unsupported request
xxx1 = Successful completion
1111 = Any status
The completion feature is not supported. This field should not be used by software
(reserved): write 0 always, read return random.
XPPMEVL[0:1]
Bus: 0 Device: 0 Function: 0 Offset: 49C, 4A0
Bus: 0 Device: 2 Function: 0 Offset: 49C, 4A0
Bus: 0 Device: 3 Function: 0 Offset: 49C, 4A0
Bit Attr
Reset
Value
Description