From: Anton Blanchard <anton@linux.ibm.com>
Date: Tue, 15 Dec 2020 03:27:26 +0000 (+1100)
Subject: Reset JTAG/DMI
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5eb351b4bec8496d917f4dff0b9c1447508d97c3;p=microwatt.git

Reset JTAG/DMI

request is never initialized and we leak X state control signals to other
parts of the core (eg dmi_wr). Add a reset.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
---

diff --git a/dmi_dtm_xilinx.vhdl b/dmi_dtm_xilinx.vhdl
index ed92e95..69d8996 100644
--- a/dmi_dtm_xilinx.vhdl
+++ b/dmi_dtm_xilinx.vhdl
@@ -222,11 +222,12 @@ begin
     -- jtag_req latch. Could be split into 3 processes but it's probably
     -- not worthwhile.
     --
-    shifter: process(jtag_clk, jtag_reset)
+    shifter: process(jtag_clk, jtag_reset, sys_reset)
     begin
-	if jtag_reset = '1' then
+	if jtag_reset = '1' or sys_reset = '1' then
 	    shiftr <= (others => '0');
 	    jtag_req <= '0';
+	    request <= (others => '0');
 	elsif rising_edge(jtag_clk) then
 
 	    -- Handle jtag "commands" when sel is 1