Altera Arria V Avalon-ST - Manual (Page 137)

Local Management Interface (LMI Interface)
The LMI bus provides access to the PCI Express Configuration Space in the Transaction Layer.
Related Information
LMI Signals on page 4-42
Hard IP Reconfiguration
The PCI Express reconfiguration bus allows you to dynamically change the
read-only
values stored in
the Configuration Registers.
Related Information
Hard IP Reconfiguration Interface on page 4-52
Transceiver Reconfiguration
The transceiver reconfiguration interface allows you to dynamically reconfigure the values of analog
settings in the PMA block of the transceiver. Dynamic reconfiguration is necessary to compensate for
process variations.
Related Information
Transceiver PHY IP Reconfiguration on page 15-1
Interrupts
The Hard IP for PCI Express offers the following interrupt mechanisms:
• Message Signaled Interrupts (MSI)— MSI uses the Transaction Layer's request-acknowledge
handshaking protocol to implement interrupts. The MSI Capability structure is stored in the Configu‐
ration Space and is programmable using Configuration Space accesses.
• MSI-X—The Transaction Layer generates MSI-X messages which are single dword memory writes. In
contrast to the MSI capability structure, which contains all of the control and status information for
the interrupt vectors, the MSI-X Capability structure points to an MSI-X table structure and MSI-X
PBA structure which are stored in memory.
• Legacy interrupts—
app_int_sts_vec[7:0]
controls legacy interrupt generation. When asserted, the
Hard IP to generates an
Assert_INT<n>
message TLP.
Related Information
• Interrupts for Endpoints on page 4-30
• Interrupts for Root Ports on page 4-31
PIPE
The PIPE interface implements the Intel-designed PIPE interface specification. You can use this parallel
interface to speed simulation; however, you cannot use the PIPE interface in actual hardware. The Gen1
and Gen2 simulation models support PIPE and serial simulation.
Related Information
PIPE Interface Signals on page 4-54
9-4 Local Management Interface (LMI Interface)
2014.12.15
Altera Corporation IP Core Architecture
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