From b10a0092aecbc6927e9a2336188615ed97614fd0 Mon Sep 17 00:00:00 2001 From: Nikos Nikoleris Date: Tue, 13 Jun 2017 11:14:00 +0100 Subject: mem: Signal the local monitor when clearing the global monitor ARM systems require the coordination of the global and local monitors. When the system is run without caches the global monitor is implemented in the abstract memory object. This change adds a callback from the abstract memory that notifies the local monitor when the global monitor is cleared. Additionally, for ARM systems the local monitor signals the event register and wakes the thread context up. Subsequent wait-for-event (WFE) instructions will be immediately signaled. Change-Id: If6c038f3a6bea7239ba4258f07f39c7f9a30500b Reviewed-by: Andreas Sandberg Reviewed-on: https://gem5-review.googlesource.com/3760 Maintainer: Nikos Nikoleris Reviewed-by: Jason Lowe-Power --- src/arch/null/locked_mem.hh | 54 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 src/arch/null/locked_mem.hh (limited to 'src/arch/null') diff --git a/src/arch/null/locked_mem.hh b/src/arch/null/locked_mem.hh new file mode 100644 index 000000000..f5ecaf7dc --- /dev/null +++ b/src/arch/null/locked_mem.hh @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2017 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) 2006 The Regents of The University of Michigan + * All rights reserved. + * + * 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: Steve Reinhardt + */ + +#ifndef __ARCH_NULL_LOCKED_MEM_HH__ +#define __ARCH_NULL_LOCKED_MEM_HH__ + +/** + * @file + * + * ISA-specific helper functions for locked memory accesses. + */ + +#include "arch/generic/locked_mem.hh" + +#endif -- cgit v1.2.3