Tue, 17 Oct 2017 12:58:25 +0800
merge
1 /*
2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2013 SAP AG. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
26 #ifndef CPU_PPC_VM_ICACHE_PPC_HPP
27 #define CPU_PPC_VM_ICACHE_PPC_HPP
29 // Interface for updating the instruction cache. Whenever the VM modifies
30 // code, part of the processor instruction cache potentially has to be flushed.
32 class ICache : public AbstractICache {
33 friend class ICacheStubGenerator;
34 static int ppc64_flush_icache(address start, int lines, int magic);
36 public:
37 enum {
38 // Actually, cache line size is 64, but keeping it as it is to be
39 // on the safe side on ALL PPC64 implementations.
40 log2_line_size = 5,
41 line_size = 1 << log2_line_size
42 };
44 static void ppc64_flush_icache_bytes(address start, int bytes) {
45 // Align start address to an icache line boundary and transform
46 // nbytes to an icache line count.
47 const uint line_offset = mask_address_bits(start, line_size - 1);
48 ppc64_flush_icache(start - line_offset, (bytes + line_offset + line_size - 1) >> log2_line_size, 0);
49 }
50 };
52 #endif // CPU_PPC_VM_ICACHE_PPC_HPP