Altera Arria V Avalon-ST - Manual (Page 207)

Location altpcietb_bfm_driver_rp.v
Arguments
bus_num PCI Express bus number of the target device.
dev_num PCI Express device number of the target device.
fnc_num Function number in the target device to be accessed.
regb_ad Byte-specific address of the register to be written.
regb_ln Length, in bytes, of the data read. Maximum length is four
bytes. The
regb_ln
and the
regb_ad
arguments cannot cross a
DWORD boundary.
lcladdr BFM shared memory address of where the read data should be
placed.
compl_status Completion status for the configuration transaction.
This argument is reg [2:0].
In both languages, this is the completion status as specified in
the PCI Express specification. The following encodings are
defined.
• 3’b000: SC— Successful completion
• 3’b001: UR— Unsupported Request
• 3’b010: CRS — Configuration Request Retry Status
• 3’b100: CA — Completer Abort
ebfm_cfgrd_nowt Procedure
The
ebfm_cfgrd_nowt
procedure reads up to four bytes of data from the specified configuration register
and stores the data in the BFM shared memory. This procedure returns as soon as the VC interface
module has accepted the transaction, allowing other reads to be issued in the interim. Use this procedure
only when successful completion status is expected and a subsequent read or write with a wait can be used
to guarantee the completion of this operation.
Location altpcietb_bfm_driver_rp.v
Syntax
ebfm_cfgrd_nowt(bus_num, dev_num, fnc_num, regb_ad, regb_ln, lcladdr)
2014.12.15
ebfm_cfgrd_nowt Procedure 16-37
Testbench and Design Example Altera Corporation
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