53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
/*
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* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2012, 2013 SAP AG. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef CPU_PPC_VM_ICACHE_PPC_HPP
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#define CPU_PPC_VM_ICACHE_PPC_HPP
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// Interface for updating the instruction cache. Whenever the VM modifies
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// code, part of the processor instruction cache potentially has to be flushed.
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class ICache : public AbstractICache {
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friend class ICacheStubGenerator;
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static int ppc64_flush_icache(address start, int lines, int magic);
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public:
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enum {
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// Actually, cache line size is 64, but keeping it as it is to be
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// on the safe side on ALL PPC64 implementations.
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log2_line_size = 5,
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line_size = 1 << log2_line_size
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};
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static void ppc64_flush_icache_bytes(address start, int bytes) {
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// Align start address to an icache line boundary and transform
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// nbytes to an icache line count.
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const uint line_offset = mask_address_bits(start, line_size - 1);
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ppc64_flush_icache(start - line_offset, (bytes + line_offset + line_size - 1) >> log2_line_size, 0);
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}
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};
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#endif // CPU_PPC_VM_ICACHE_PPC_HPP
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