ZHCSS37J may 2009 – january 2021 XIO2001
PRODUCTION DATA
In the extended PCI Express configuration space, the bridge supports the advanced error reporting capabilities structure. For the PCI Express interface, both correctable and uncorrectable error statuses are provided. For the PCI bus interface, secondary uncorrectable error status is provided. All uncorrectable status bits have corresponding mask and severity control bits. For correctable status bits, only mask bits are provided.
Both the primary and secondary interfaces include first error pointer and header log registers. When the first error is detected, the corresponding bit position within the uncorrectable status register is loaded into the first error pointer register. Likewise, the header information associated with the first failing transaction is loaded into the header log. To reset this first error control logic, the corresponding status bit in the uncorrectable status register is cleared by a writeback of 1b.
For systems that require high data reliability, ECRC is fully supported on the PCI Express interface. The primary side advanced error capabilities and control register has both ECRC generation and checking enable control bits. When the checking bit is asserted, all received TLPs are checked for a valid ECRC field. If the generation bit is asserted, then all transmitted TLPs contain a valid ECRC field.