Remove LOC constraint, and add Linux test for 100T.

Signed-off-by: Tim Callahan <tcal@google.com>

xc7/README.rst

@@ -75,5 +75,6 @@ To build the linux-litex-demo example, run the following commands:
 .. code:: bash
 
         pushd xc7/linux_litex_demo && make && popd
+        pushd xc7/linux_litex_demo && TARGET=arty_100 make && popd
 
 .. build_examples_include_end_label

xc7/linux_litex_demo/Makefile

@@ -6,13 +6,22 @@ VERILOG := ${current_dir}/baselitex_arty.v \
 MEM_INIT := ${current_dir}/mem.init \
             ${current_dir}/mem_1.init \
             ${current_dir}/mem_2.init
-PARTNAME := xc7a35tcsg324-1
-DEVICE  := xc7a50t_test
 BITSTREAM_DEVICE := artix7
 PCF := ${current_dir}/arty.pcf
 SDC := ${current_dir}/arty.sdc
 XDC := ${current_dir}/arty.xdc
-BUILDDIR := build
+BUILDDIR_35  := build
+BUILDDIR_100 := build
+
+ifeq ($(TARGET),arty_100)
+    PARTNAME := xc7a100tcsg324-1
+    DEVICE   := xc7a100t_test
+    BUILDDIR := ${BUILDDIR_100}
+else
+    PARTNAME := xc7a35tcsg324-1
+    DEVICE   := xc7a50t_test
+    BUILDDIR := ${BUILDDIR_35}
+endif
 
 all: ${BUILDDIR}/${TOP}.bit
 
@@ -21,7 +30,7 @@ ${BUILDDIR}:
 	ln -s ${MEM_INIT} ${BUILDDIR}
 
 ${BUILDDIR}/${TOP}.eblif: | ${BUILDDIR}
-	cd ${BUILDDIR} && symbiflow_synth -t ${TOP} -v ${VERILOG} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} -x ${XDC} 2>&1 > /dev/null
+	cd ${BUILDDIR} && symbiflow_synth -t ${TOP} -v ${VERILOG} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} -x ${XDC} 
 
 ${BUILDDIR}/${TOP}.net: ${BUILDDIR}/${TOP}.eblif
 	cd ${BUILDDIR} && symbiflow_pack -e ${TOP}.eblif -d ${DEVICE} -s ${SDC} 2>&1 > /dev/null
@@ -39,5 +48,4 @@ ${BUILDDIR}/${TOP}.bit: ${BUILDDIR}/${TOP}.fasm
 	cd ${BUILDDIR} && symbiflow_write_bitstream -d ${BITSTREAM_DEVICE} -f ${TOP}.fasm -p ${PARTNAME} -b ${TOP}.bit
 
 clean:
-	rm -rf ${BUILDDIR}
-
+	rm -rf ${BUILDDIR_35} ${BUILDDIR_100}