From 799c3da8d0086bfdfbae532e05018828387e4497 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@ARM.com>
Date: Thu, 17 Mar 2011 19:20:19 -0500
Subject: O3: Send instruction back to fetch on squash to seed predecoder
correctly.
---
src/kern/linux/events.cc | 12 ++++++++++++
1 file changed, 12 insertions(+)
(limited to 'src/kern/linux/events.cc')
diff --git a/src/kern/linux/events.cc b/src/kern/linux/events.cc
index f619dd11b..60aa857ac 100644
--- a/src/kern/linux/events.cc
+++ b/src/kern/linux/events.cc
@@ -1,4 +1,16 @@
/*
+ * Copyright (c) 2011 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
* Copyright (c) 2004-2006 The Regents of The University of Michigan
* All rights reserved.
*
--
cgit v1.2.3
From b78be240cf1c1269ed83548bf71095193487ca33 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@ARM.com>
Date: Thu, 17 Mar 2011 19:20:20 -0500
Subject: ARM: Detect and skip udelay() functions in linux kernel.
This change speeds up booting, especially in MP cases, by not executing
udelay() on the core but instead skipping ahead tha amount of time that is being
delayed.
---
src/kern/linux/events.cc | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
(limited to 'src/kern/linux/events.cc')
diff --git a/src/kern/linux/events.cc b/src/kern/linux/events.cc
index 60aa857ac..75c2b6f7f 100644
--- a/src/kern/linux/events.cc
+++ b/src/kern/linux/events.cc
@@ -44,11 +44,13 @@
#include <sstream>
#include "base/trace.hh"
+#include "arch/utility.hh"
#include "cpu/thread_context.hh"
#include "kern/linux/events.hh"
#include "kern/linux/printk.hh"
#include "kern/system_events.hh"
#include "sim/arguments.hh"
+#include "sim/pseudo_inst.hh"
#include "sim/system.hh"
namespace Linux {
@@ -66,4 +68,27 @@ DebugPrintkEvent::process(ThreadContext *tc)
SkipFuncEvent::process(tc);
}
+void
+UDelayEvent::process(ThreadContext *tc)
+{
+ int arg_num = 0;
+
+ // Get the time in native size
+ uint64_t time = TheISA::getArgument(tc, arg_num, (uint16_t)-1, false);
+
+ // convert parameter to ns
+ if (argDivToNs)
+ time /= argDivToNs;
+
+ time *= argMultToNs;
+
+ // Convert ns to ticks
+ time *= SimClock::Int::ns;
+
+ SkipFuncEvent::process(tc);
+
+ PseudoInst::quiesceNs(tc, time);
+}
+
+
} // namespace linux
--
cgit v1.2.3