From acd953afd2f52d64e2264c2c7c713dc0ad614406 Mon Sep 17 00:00:00 2001
From: Andrew Waterman <andrew@sifive.com>
Date: Sun, 29 Mar 2020 16:17:53 -0700
Subject: When enabling the debug module, poll til it's really enabled

Resolves #435
---
 fesvr/dtm.cc | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'fesvr')

diff --git a/fesvr/dtm.cc b/fesvr/dtm.cc
index 6e4952f..993011d 100644
--- a/fesvr/dtm.cc
+++ b/fesvr/dtm.cc
@@ -560,6 +560,8 @@ void dtm_t::producer_thread()
 
   // Enable the debugger.
   write(DMI_DMCONTROL, DMI_DMCONTROL_DMACTIVE);
+  // Poll until the debugger agrees it's enabled.
+  while ((read(DMI_DMCONTROL) & DMI_DMCONTROL_DMACTIVE) == 0) ;
     
   // These are checked every time we run an abstract command.
   uint32_t abstractcs = read(DMI_ABSTRACTCS);
-- 
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