Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

91

Each local device contains a set of local error registers. The PCIe Root Port Local Error 

registers are defined by the PCI Express Base Specification, Revision 2.1.

The local error register definitions are:

• Local Uncorrectable Error Status Register

The SoC provides the Local Uncorrectable Error Status registers for the 

uncorrectable errors associated with the SoC local interfaces. When a specific 

uncorrectable error occurred in the local interface, its corresponding bit in the 

Uncorrectable Error Status register is set. Each error is individually masked by 

the Uncorrectable Error Mask register.

• Local Uncorrectable Error Mask Register

• Local Uncorrectable Error Severity Register

The SoC provides Local Error Severity registers for uncorrectable errors 

associated with SoC local interfaces. The Local Uncorrectable Error Severity 

register controls whether an individual error is reported as a non-fatal or fatal 

error. An error is reported as fatal when the corresponding error bit in the 

severity register is set. If the bit is clear, the corresponding error is considered 

non-fatal.

The PCIe Root Complex integrated endpoint detected uncorrectable internal errors are 

reported using Uncorrectable Internal Error Status (bit 22) of the ERRUNCSTS register 

and then uses the ERRUNCSEV: Uncorrectable Internal Error Severity bit to control the 

severity of the uncorrectable internal errors. This is reported using Uncorrectable 

Internal Error Status (bit 22) of the ERRUNCSTS register and the Corrected Internal 

Status (bit 14) of the ERRCORSTS register.

• Local Uncorrectable First/Next Error Status Register

The SoC provides the Local Error Log register for the errors associated with the 

SoC local interfaces. When an error is detected by the SoC, the information 

related to the error is stored in the log register. The SoC local errors are first 

separated into correctable and uncorrectable categories. Each category 

contains two sets of log registers: FERR and NERR. FERR logs the first 

occurrence of an error, while NERR logs the subsequent occurrence of the 

errors. 

FERR/NERR do not log a masked error. The FERR log remains valid and unchanged from 

the first error detection until the clearing of the corresponding FERR Error bit in the 

Error Status register by the software. The xxxxERRUNCSTS registers are only cleared 

by writing to the corresponding Local Error Status register. For example, clearing bit 0 

in RTF_ERRUNCSTS clears the bit in this register and bit 0 in RTF_FERRUNCSTS and 

RTF_NERRUNCSTS.

• Local Uncorrectable First Error Header Log Register

The SoC provides Local First Error Header Log register for the uncorrectable 

errors associated with the SoC local interfaces. The Header log stores the 

header information of the associated first uncorrectable error.