From: Tobias Platen <tplaten@posteo.de>
Date: Sat, 22 Jan 2022 13:36:20 +0000 (+0100)
Subject: add microwatt docs
X-Git-Tag: opf_rfc_ls005_v1~3249
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fb76d1dcb92bf877d0e0d23775ef29a242d50ea9;p=libreriscv.git

add microwatt docs
---

diff --git a/HDL_workflow/microwatt.mdwn b/HDL_workflow/microwatt.mdwn
new file mode 100644
index 000000000..8de9495b2
--- /dev/null
+++ b/HDL_workflow/microwatt.mdwn
@@ -0,0 +1,19 @@
+# Build instructions for Microwatt
+
+After installing ghdl-yosys-plugin use schroot to switch environment
+
+    schroot -c bullseye_ghdl
+    git clone https://github.com/antonblanchard/microwatt
+    export FPGA_TARGET=verilator
+    make microwatt-verilator
+
+Then run the resulting binary
+
+    time ./microwatt-verilator
+
+If everything works correcly it will print out an light bulb in ascii art
+with the message Microwatt, it works. On my ASUS KGPE D16 this takes
+
+     real	1m4.986s
+     user	1m4.373s
+     sys	0m0.013s
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