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AR# 6224

M1 Map - WARNING:x4kma:423: Signals drive closed FMAPs. Set XIL_MAP_OPEN_FMAPS

Description

Keywords: signals, drive, closed, MAP, FMAP, HMAP, XIL_MAP_OPEN_FMAPS,
reduced, environment, variable

Urgency: Standard

General Description:

WARNING:x4kma:423 - The following signals, driven by buffers or
logic that reduced to a buffer, drive closed FMAPs. You may open
all closed FMAPs by setting the environment variable
XIL_MAP_OPEN_FMAPS.

解决方案

This warning is saying that there is some logic that has been reduced
to a buffer (nothing) that could be merged into a particular FMAP, but
the FMAP is closed. So there will be an extra level of logic that could
be avoided had the FMAP been open.

"Closed" indicates that the software cannot add or remove logic from
the function specified by the MAP symbol.

A workaround is to set the XIL_MAP_OPEN_FMAPS environment
variable, which will set all FMAPs to open.

Reference the libraries guide for more information regarding the
MAP attribute:
http://toolbox.xilinx.com/docsan/data/alliance/lib/lib12_5.htm#X12681
AR# 6224
创建日期 08/31/2007
Last Updated 10/01/2008
状态 Archive
Type 综合文章