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/*
* Copyright (c) 2013, Red Hat Inc.
* Copyright (c) 1997, 2012, Oracle and/or its affiliates.
* All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "asm/macroAssembler.hpp"
#include "asm/macroAssembler.inline.hpp"
#include "memory/resourceArea.hpp"
#include "runtime/java.hpp"
#include "runtime/stubCodeGenerator.hpp"
#include "vm_version_aarch64.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "os_linux.inline.hpp"
#endif
#ifndef BUILTIN_SIM
#include <sys/auxv.h>
#include <asm/hwcap.h>
#ifndef HWCAP_AES
#define HWCAP_AES (1<<3)
#endif
#ifndef HWCAP_CRC32
#define HWCAP_CRC32 (1<<7)
#endif
#endif
int VM_Version::_cpu;
int VM_Version::_model;
int VM_Version::_stepping;
int VM_Version::_cpuFeatures;
const char* VM_Version::_features_str = "";
static BufferBlob* stub_blob;
static const int stub_size = 550;
extern "C" {
typedef void (*getPsrInfo_stub_t)(void*);
}
static getPsrInfo_stub_t getPsrInfo_stub = NULL;
class VM_Version_StubGenerator: public StubCodeGenerator {
public:
VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {}
address generate_getPsrInfo() {
StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub");
# define __ _masm->
address start = __ pc();
#ifdef BUILTIN_SIM
__ c_stub_prolog(1, 0, MacroAssembler::ret_type_void);
#endif
// void getPsrInfo(VM_Version::CpuidInfo* cpuid_info);
address entry = __ pc();
// TODO : redefine fields in CpuidInfo and generate
// code to fill them in
__ ret(lr);
# undef __
}
};
void VM_Version::get_processor_features() {
_supports_cx8 = true;
_supports_atomic_getset4 = true;
_supports_atomic_getadd4 = true;
_supports_atomic_getset8 = true;
_supports_atomic_getadd8 = true;
FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256);
FLAG_SET_DEFAULT(PrefetchScanIntervalInBytes, 256);
FLAG_SET_DEFAULT(PrefetchFieldsAhead, 256);
FLAG_SET_DEFAULT(PrefetchCopyIntervalInBytes, 256);
#ifndef BUILTIN_SIM
unsigned long auxv = getauxval(AT_HWCAP);
if (FLAG_IS_DEFAULT(UseCRC32)) {
UseCRC32 = (auxv & HWCAP_CRC32) != 0;
}
if (UseCRC32 && (auxv & HWCAP_CRC32) == 0) {
warning("UseCRC32 specified, but not supported on this CPU");
}
if (auxv & HWCAP_AES) {
UseAES = UseAES || FLAG_IS_DEFAULT(UseAES);
UseAESIntrinsics =
UseAESIntrinsics || (UseAES && FLAG_IS_DEFAULT(UseAESIntrinsics));
if (UseAESIntrinsics && !UseAES) {
warning("UseAESIntrinsics enabled, but UseAES not, enabling");
UseAES = true;
}
} else {
if (UseAES) {
warning("UseAES specified, but not supported on this CPU");
}
if (UseAESIntrinsics) {
warning("UseAESIntrinsics specified, but not supported on this CPU");
}
}
#endif
if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
UseCRC32Intrinsics = true;
}
}
void VM_Version::initialize() {
ResourceMark rm;
stub_blob = BufferBlob::create("getPsrInfo_stub", stub_size);
if (stub_blob == NULL) {
vm_exit_during_initialization("Unable to allocate getPsrInfo_stub");
}
CodeBuffer c(stub_blob);
VM_Version_StubGenerator g(&c);
getPsrInfo_stub = CAST_TO_FN_PTR(getPsrInfo_stub_t,
g.generate_getPsrInfo());
get_processor_features();
}
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