Freescale Semiconductor MSC8156 Evaluation Module MSC8156EVM MSC8156EVM Benutzerhandbuch
Produktcode
MSC8156EVM
MSC8156 Reference Manual, Rev. 2
17-46
Freescale
Semiconductor
PCI Express Controller
23–21
TC
Traffic class. This field indicates the traffic class of the outbound packet. This field only applies to memory
transaction. All other transaction types should set the TC field to 0.
000 TC0
001 TC1
010 TC2
011 TC3
100 TC4
101 TC5
110 TC6
111 TC7
Note: Traffic class settings are passed through to the PCI Express link, but no specific actions are taken in
transaction. All other transaction types should set the TC field to 0.
000 TC0
001 TC1
010 TC2
011 TC3
100 TC4
101 TC5
110 TC6
111 TC7
Note: Traffic class settings are passed through to the PCI Express link, but no specific actions are taken in
the device based on traffic class.
20
—
Reserved
19–16
RTT
Read transaction type. Read transaction type to run on the PCI Express link
0000 Reserved
0000 Reserved
0010 Configuration read. Supported only when in RC mode and size of less than or equal to 4 bytes and not
0000 Reserved
0000 Reserved
0010 Configuration read. Supported only when in RC mode and size of less than or equal to 4 bytes and not
crossing 4-byte address boundary.
0100 Memory read
...
...
Reserved
1000 IO read. Supported only when in RC mode and size of less than or equal to 4 bytes and not crossing
4-byte address boundary.
...
Reserved
1111 Reserved
15–12
WTT
Write transaction type. Write transaction type to run on the PCI Express link.
0000 Reserved
0001 Reserved
0010 Configuration write. Supported only when in RC mode and size of less than or equal to 4 bytes and not
0000 Reserved
0001 Reserved
0010 Configuration write. Supported only when in RC mode and size of less than or equal to 4 bytes and not
crossing 4-byte address boundary.
0100 Memory write
0101 Message write. Only support 4-byte size access on a 4-byte address boundary.
...
0101 Message write. Only support 4-byte size access on a 4-byte address boundary.
...
Reserved
1000 IO Write. Supported only when in RC mode and size of less than or equal to 4 bytes and not crossing
4-byte address boundary.
...
Reserved
1111 Reserved
11–6
—
Reserved
5–0
OWS
Outbound window size. Outbound translation window size N which is the encoded 2
(N + 1)
-byte window size.
The smallest window size is 4 Kbytes. Note that for the default window (window 0), the outbound window
size may be programmed less than the 64-Gbyte maximum. However, accesses that miss all other windows
and hit outside the default window will be aliased to the default window.
000000 Reserved
...
001011 4-Kbyte window size
001100 8-Kbyte window size
...
011111
size may be programmed less than the 64-Gbyte maximum. However, accesses that miss all other windows
and hit outside the default window will be aliased to the default window.
000000 Reserved
...
001011 4-Kbyte window size
001100 8-Kbyte window size
...
011111
4-Gbyte window size
100000 8-Gbyte window size
100001 16-Gbyte window size
100010 32-Gbyte window size
100011 64-Gbyte window size
100100 Reserved
...
111111
100001 16-Gbyte window size
100010 32-Gbyte window size
100011 64-Gbyte window size
100100 Reserved
...
111111
Reserved
Table 17-35. PEXOWARn Field Descriptions (Continued)
Bits
Name
Description