Altera IP Compiler for PCI Express - Manual (Page 346)

B–28 Chapter :
Incremental Compile Module for Descriptor/Data Examples
IP Compiler for PCI Express User Guide August 2014 Altera Corporation
_icm Partition
When you generate an IP Compiler for PCI Express, the parameter editor generates
module _icm in the subdirectory
_examples\common\incremental_compile_module
, as a
wrapper file that contains the IP core and the ICM module. (Refer to Figure B–23 .)
Your application connects to this wrapper file. The wrapper interface resembles the IP
Compiler for PCI Express interface, but replaces it with an Avalon-ST interface. (Refer
to
Table B–12 .)
1 The wrapper interface omits some signals from the IP core to maximize circuit
optimization across the partition boundary. However, all of the IP core signals are still
available in the IP core instance and can be wired to the wrapper interface by editing
the _icm file as required.
By setting this wrapper module as a design partition, you can preserve timing of the
IP core using the incremental synthesis flow.
Table B–12 describes the _icm interfaces.
Table B–12. _icm Interface Descriptions
Signal Group Description
Transmit Datapath
ICM Avalon-ST TX interface. These signals include tx_stream_valid0, tx_stream_data0,
tx_stream_ready0
, tx_stream_cred0, and tx_stream_mask0. Refer to Table B–15 on
page B–33 for details.
Receive Datapath
ICM interface. These signals include rx_stream_valid0, rx_stream_data0,
rx_stream_ready0
, and rx_stream_mask0. Refer to Table B–14 on page B–32 for details.
Configuration ()
Part of ICM sideband interface. These signals include cfg_busdev_icm, cfg_devcsr_icm, and
cfg_linkcsr_icm
.
Completion interfaces
Part of ICM sideband interface. These signals include cpl_pending_icm, cpl_err_icm,
pex_msi_num_icm
, and app_int_sts_icm. Refer to Table B–17 on page B–36 for details.
Interrupt
ICM Avalon-ST MSI interface. These signals include msi_stream_valid0, msi_stream_data0,
and msi_stream_ready0. Refer to
Table B–16 on page B–35 for details.
Test Interface
Part of ICM sideband signals; includes test_out_icm. Refer to Table B–17 on page B–36 for
details.
Global Interface
IP core signals; includes refclk, clk125_in, clk125_out, npor, srst, crst, ls_exit,
hotrst_exit
, and dlup_exit. Refer to Chapter 5, IP Core Interfaces for details.
PIPE Interface
IP core signals; includes tx, rx, pipe_mode, txdata0_ext, txdatak0_ext,
txdetectrx0_ext
, txelecidle0_ext, txcompliance0_ext, rxpolarity0_ext,
powerdown0_ext , rxdata0_ext, rxdatak0_ext, rxvalid0_ext, phystatus0_ext,
rxelecidle0_ext , rxstatus0_ext, txdata0_ext, txdatak0_ext, txdetectrx0_ext,
txelecidle0_ext , txcompliance0_ext, rxpolarity0_ext, powerdown0_ext,
rxdata0_ext , rxdatak0_ext, rxvalid0_ext, phystatus0_ext, rxelecidle0_ext, and
rxstatus0_ext . Refer Chapter 5, IP Core Interfaces for details.
Maximum Completion
Space Signals
This signal is ko_cpl_spc_vc, and is not available at the _icm ports () .
Instead, this static signal is regenerated for the user in the _example_pipen1b
module.
Note to Table B–12 :
(1) Cfg_tcvcmap is available from the ICM module, but not wired to the _icm ports. Refer to Table B–17 on page B–36 for
details.