1/*
2 * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "asm/macroAssembler.hpp"
27#include "assembler_arm.inline.hpp"
28#include "runtime/icache.hpp"
29
30#define __ _masm->
31
32#ifdef AARCH64
33
34static int icache_flush(address addr, int lines, int magic) {
35  // TODO-AARCH64 Figure out actual cache line size (mrs Xt, CTR_EL0)
36
37  address p = addr;
38  for (int i = 0; i < lines; i++, p += ICache::line_size) {
39    __asm__ volatile(
40      " dc cvau, %[p]"
41      :
42      : [p] "r" (p)
43      : "memory");
44  }
45
46  __asm__ volatile(
47    " dsb ish"
48    : : : "memory");
49
50  p = addr;
51  for (int i = 0; i < lines; i++, p += ICache::line_size) {
52    __asm__ volatile(
53      " ic ivau, %[p]"
54      :
55      : [p] "r" (p)
56      : "memory");
57  }
58
59  __asm__ volatile(
60    " dsb ish\n\t"
61    " isb\n\t"
62    : : : "memory");
63
64  return magic;
65}
66
67#else
68
69static int icache_flush(address addr, int lines, int magic) {
70  __builtin___clear_cache(addr, addr + (lines << ICache::log2_line_size));
71  return magic;
72}
73
74#endif // AARCH64
75
76void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
77  address start = (address)icache_flush;
78
79  *flush_icache_stub = (ICache::flush_icache_stub_t)start;
80
81  // ICache::invalidate_range() contains explicit condition that the first
82  // call is invoked on the generated icache flush stub code range.
83  ICache::invalidate_range(start, 0);
84
85  {
86    // dummy code mark to make the shared code happy
87    // (fields that would need to be modified to emulate the correct
88    // mark are not accessible)
89    StubCodeMark mark(this, "ICache", "fake_stub_for_inlined_icache_flush");
90    __ ret();
91  }
92}
93
94#undef __
95