Altera Stratix V Avalon-ST - Manual (Page 246)

ebfm_cfgwr_imm_wait Procedure
The
ebfm_cfgwr_imm_wait
procedure writes up to four bytes of data to the specified configuration
register. This procedure waits until the write completion has been returned.
Location altpcietb_bfm_driver_rp.v
Syntax
ebfm_cfgwr_imm_wait(bus_num, dev_num, fnc_num, imm_regb_ad, regb_ln, imm_
data, compl_status
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 written. Maximum length is four
bytes. The
regb_ln
and the
regb_ad
arguments cannot cross a
DWORD boundary.
imm_data Data to be written.
This argument is
reg [31:0]
.
The bits written depend on the length:
• 4: 31 downto 0
• 3: 23 downto 0
• 2: 15 downto 0
• 1: 7 downto 0
compl_status This argument is
reg [2:0]
.
This argument 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_cfgwr_imm_nowt Procedure
The
ebfm_cfgwr_imm_nowt
procedure writes up to four bytes of data to the specified configuration
register. This procedure returns as soon as the VC interface module accepts the transaction, allowing
other writes to be issued in the interim. Use this procedure only when successful completion status is
expected.
UG-01097_avst
2014.12.15
ebfm_cfgwr_imm_wait Procedure 17-35
Testbench and Design Example Altera Corporation
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