From: Andreas Hansson <andreas.hansson@arm.com>
Date: Mon, 19 Aug 2013 07:52:26 +0000 (-0400)
Subject: mem: Allow disabling of tXAW through a 0 activation limit
X-Git-Tag: stable_2014_02_15~179
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7bc3eaec7a7a67b821774bea4298418241cbf815;p=gem5.git

mem: Allow disabling of tXAW through a 0 activation limit

This patch fixes an issue where an activation limit of 0 was not
allowed. With this patch, setting the limit to 0 simply disables the
tXAW constraint.
---

diff --git a/src/mem/simple_dram.cc b/src/mem/simple_dram.cc
index 2bb1cec9d..3d8f71ee9 100644
--- a/src/mem/simple_dram.cc
+++ b/src/mem/simple_dram.cc
@@ -852,6 +852,10 @@ SimpleDRAM::recordActivate(Tick act_tick)
 
     DPRINTF(DRAM, "Activate at tick %d\n", act_tick);
 
+    // if the activation limit is disabled then we are done
+    if (actTicks.empty())
+        return;
+
     // sanity check
     if (actTicks.back() && (act_tick - actTicks.back()) < tXAW) {
         panic("Got %d activates in window %d (%d - %d) which is smaller "