1 /*
2 * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2018 SAP SE. 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 */
25
26 #include "precompiled.hpp"
27 #include "runtime/icache.hpp"
28
29 // Use inline assembler to implement icache flush.
ppc64_flush_icache(address start,int lines,int magic)30 int ICache::ppc64_flush_icache(address start, int lines, int magic) {
31 address end = start + (unsigned int)lines*ICache::line_size;
32 assert(start <= end, "flush_icache parms");
33
34 // Store modified cache lines from data cache.
35 for (address a = start; a < end; a += ICache::line_size) {
36 __asm__ __volatile__(
37 "dcbst 0, %0 \n"
38 :
39 : "r" (a)
40 : "memory");
41 }
42
43 // sync instruction
44 __asm__ __volatile__(
45 "sync \n"
46 :
47 :
48 : "memory");
49
50 // Invalidate respective cache lines in instruction cache.
51 for (address a = start; a < end; a += ICache::line_size) {
52 __asm__ __volatile__(
53 "icbi 0, %0 \n"
54 :
55 : "r" (a)
56 : "memory");
57 }
58
59 // Discard fetched instructions.
60 __asm__ __volatile__(
61 "isync \n"
62 :
63 :
64 : "memory");
65
66 return magic;
67 }
68
generate_icache_flush(ICache::flush_icache_stub_t * flush_icache_stub)69 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
70
71 *flush_icache_stub = (ICache::flush_icache_stub_t)ICache::ppc64_flush_icache;
72
73 // First call to flush itself.
74 // Pointless since we call C, but it is expected to get
75 // executed during VM_Version::determine_features().
76 ICache::invalidate_range((address)(*flush_icache_stub), 0);
77 }
78