Altera IP Compiler for PCI Express - Manual (Page 113)

Chapter 5: IP Core Interfaces 5–27
Avalon-ST Interface
August 2014 Altera Corporation IP Compiler for PCI Express User Guide
ECC Error Signals
Table 5–8 shows the ECC error signals for the hard IP implementation.
PCI Express Interrupts for Endpoints
Table 5–9 describes the IP core’s interrupt signals for endpoints.
Table 5–8. ECC Error Signals for Hard IP Implementation (Note 1) (Note 2)
Signal I/O Description
derr_cor_ext_rcv[1:0] (3) O
Indicates a correctable error in the RX buffer for the corresponding virtual
channel.
derr_rpl (3) O Indicates an uncorrectable error in the retry buffer.
derr_cor_ext_rpl (3) O Indicates a correctable error in the retry buffer.
r2c_err0 O
Indicates an uncorrectable ECC error on VC0. Altera recommends
resetting the IP Compiler for PCI Express when an uncorrectable ECC error
is detected and the packet cannot be terminated early. Resetting
guarantees that the Configuration Space Registers are not corrupted by an
errant TLP.
r2c_err1 O
Indicates an uncorrectable ECC error on VC1. Altera recommends
reseeting the IP Compiler for PCI Express when an uncorrectable ECC
error is detected and the packet cannot be terminated early. Resetting
guarantees that the Configuration Space Registers are not corrupted by an
errant TLP
Notes to Table 5–8 :
(1) These signals are not available for the hard IP implementation in Arria II GX devices.
(2) The Avalon-ST rx_st_err described in Table 5–2 on page 5–6 indicates an uncorrectable error in the RX buffer.
(3) This signal applies only when ECC is enabled in some hard IP configurations. Refer to Table 1–9 on page 1–12 for more information.
Table 5–9. Interrupt Signals for Endpoints (Part 1 of 2)
Signal I/O Description
app_msi_req I
Application MSI request. Assertion causes an MSI posted write TLP to be generated based
on the MSI configuration register values and the app_msi_tc and app_msi_num input
ports.
app_msi_ack O
Application MSI acknowledge. This signal is sent by the IP core to acknowledge the
application's request for an MSI interrupt.
app_msi_tc[2:0] I
Application MSI traffic class. This signal indicates the traffic class used to send the MSI
(unlike INTX interrupts, any traffic class can be used to send MSIs).
app_msi_num[4:0] I
Application MSI offset number. This signal is used by the application to indicate the offset
between the base message data and the MSI to send.
cfg_msicsr[15:0] O
Configuration MSI control status register. This bus provides MSI software control. Refer to
Table 5–10 and Table 5–11 for more information.
pex_msi_num[4:0] I
Power management MSI number. This signal is used by power management and hot plug
to determine the offset between the base message interrupt number and the message
interrupt number to send through MSI.