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authorGabe Black <gabeblack@google.com>2019-08-27 23:34:31 -0700
committerGabe Black <gabeblack@google.com>2019-10-01 22:08:58 +0000
commit0c6afe0d0ab22221911619cd5eef3589e0e04e08 (patch)
tree7a898e729c74960684a0d33b55cf2c1a3744b094
parent54cf33fbf392f4dc47c8c3559e6f6f10ae3288dc (diff)
downloadgem5-0c6afe0d0ab22221911619cd5eef3589e0e04e08.tar.xz
fastmodel: Add a utility class which makes it easier to watch signals.
These signals come from the exported virtual subsystem and could signal interrupts, etc. The new SignalReceiver class makes it easier to watch those signals and perform some behavior when they change without having to bring along a lot of systemc baggage. Change-Id: I09651de1dd0e7340a61779aaf080c695ce299fd4 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21043 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>
-rw-r--r--src/arch/arm/fastmodel/common/signal_receiver.hh75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/arch/arm/fastmodel/common/signal_receiver.hh b/src/arch/arm/fastmodel/common/signal_receiver.hh
new file mode 100644
index 000000000..c249c3aaf
--- /dev/null
+++ b/src/arch/arm/fastmodel/common/signal_receiver.hh
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2019 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__
+#define __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__
+
+#include <amba_pv.h>
+#include <functional>
+
+namespace FastModel
+{
+
+class SignalReceiver : public amba_pv::signal_slave_base<bool>
+{
+ public:
+ typedef std::function<void(bool)> OnChangeFunc;
+
+ private:
+ bool _state;
+ OnChangeFunc _onChange;
+
+ public:
+ amba_pv::signal_slave_export<bool> signal_in;
+
+ SignalReceiver(const char *name) : SignalReceiver(name, nullptr) {}
+
+ SignalReceiver(const char *name, OnChangeFunc on_change) :
+ amba_pv::signal_slave_base<bool>(name),
+ _state(false), _onChange(on_change)
+ {
+ signal_in.bind(*this);
+ }
+
+ void onChange(OnChangeFunc func) { _onChange = func; }
+
+ void
+ set_state(int export_id, const bool &new_state) override
+ {
+ if (new_state == _state)
+ return;
+
+ _state = new_state;
+ _onChange(_state);
+ }
+};
+
+} // namespace FastModel
+
+#endif // __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__