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UG197 (v1.5) July 22, 2009

Error Detection

That configuration requests obey the following restrictions:

• TC[2:0] must be 000b

• Attr[1:0] must be 00b

• Length[9:0] must be 00 0000 0001b

• The last DW BE[3:0] must be 000b

Any configuration request that violates this rule is treated as a

Malformed TLP.

2.2.7 Optional Endpoint block

That configuration requests address a valid function number field. 7.3.2 Required Endpoint block

Checks Made Regarding Message Requests

That Assert_INTx/Deassert_INTx Messages are only issued by

upstream Ports. Any Assert_INTx/Deassert_INTx Message that violates

this rule is treated as a Malformed TLP.

2.2.8.1 Optional Endpoint block

That Assert_INTx/Deassert_INTx Messages use TC0. Any

Assert_INTx/Deassert_INTx Message that violates this rule is treated as

a Malformed TLP.

2.2.8.1 Required Endpoint block

That Power Management Messages use TC0. Any PM Message that

violates this rule is treated as a Malformed TLP.

2.2.8.2 Required Endpoint block

That Error Signaling Messages use TC0. Any Error Signaling Message

that violates this rule is treated as a Malformed TLP.

2.2.8.3 Required Endpoint block

That Unlock Messages use TC0. Any Unlock Message that violates this

rule is treated as a Malformed TLP.

2.2.8.4 Required Endpoint block

That Set_Slot_Power_Limit Messages use TC0. Any

Set_Slot_Power_Limit message that violates this rule is treated as a

Malformed TLP.

2.2.8.5 Required Endpoint block

Unsupported Type 0 Vendor-Defined Messages. Reported as

unsupported requests.

Note: Type 1 Vendor-Defined Messages should be ignored.

2.2.8.6 Required User

Unsupported messages, i.e., all messages other than:

• Supported Type 0 Vendor-Defined Messages (message code

01111110)

• Type 1 Vendor-Defined Messages (message code 01111111)

• Ignored Messages (messages codes 01000000, 01000001,

01000011, 01000100, 01000101, 01000111, 01001000)

Reported as unsupported requests.

2.2.8.6, 2.2.8.7 Required User

Checks Made Regarding Handling of TLPs

That any received TLP passes the required and implemented optional

checks on TLP formation. Any TLP that violates this rule is a malformed

TLP. The user must generate the appropriate completion TLP.

2.3 Required Endpoint block

Table 4-2: Error Checking Summary (Continued)

PCI Express

Specification

Section

Check is

Required

or Optional

Where Check is

Implemented

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 119 120

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