a3e113239b
In most cases, the microcode ROM doesn't actually do anything. The structural existence of a microcode ROM doesn't make sense in the general case, and in architectures that know they have one and need to interact with it, they can cast their decoder into an arch specific type and access the ROM that way. Change-Id: I25b67bfe65df1fdb84eb5bc894cfcb83da1ce64b Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32898 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>
42 lines
1.8 KiB
C++
42 lines
1.8 KiB
C++
/*
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* Copyright 2020 Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ARCH_GENERIC_DECODER_HH__
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#define __ARCH_GENERIC_DECODER_HH__
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#include "base/types.hh"
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#include "cpu/static_inst_fwd.hh"
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class InstDecoder
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{
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public:
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virtual StaticInstPtr fetchRomMicroop(
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MicroPC micropc, StaticInstPtr curMacroop);
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};
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#endif // __ARCH_DECODER_GENERIC_HH__
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