Merge pull request f4pga#1906 from antmicro/allow-custom-top-module

xc7: yosys: allow custom top module instead of using only auto-top
mithro · Jan 5, 2021 · 45cc311 · 45cc311
2 parents 65874e7 + 3c6219f
commit 45cc311
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diff --git a/xc/xc7/toolchain_wrappers/symbiflow_synth b/xc/xc7/toolchain_wrappers/symbiflow_synth
@@ -92,6 +92,7 @@ fi
 
 DATABASE_DIR=${DATABASE_DIR:=$(prjxray-config)}
 
+export TOP=${TOP}
 export USE_ROI="FALSE"
 export INPUT_XDC_FILE=${XDC_FILES[*]}
 export OUT_JSON=$TOP.json

diff --git a/xc/xc7/yosys/synth.tcl b/xc/xc7/yosys/synth.tcl
@@ -29,7 +29,11 @@ if { $::env(USE_ROI) == "TRUE" } {
     # Re-targetting FD to FDREs
     techmap -map  $::env(TECHMAP_PATH)/retarget.v
 
-    hierarchy -check -auto-top
+    if { [info exists ::env(TOP)] && $::env(TOP) != "" } {
+        hierarchy -check -top $::env(TOP)
+    } else {
+        hierarchy -check -auto-top
+    }
 
     # Start flow after library reading
     synth_xilinx -flatten -abc9 -nosrl -noclkbuf -nodsp -iopad -nowidelut -run prepare:check