Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

  * Copyright (c) 2015, 2019, Loongson Technology. 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_mips.hpp"

 #ifdef TARGET_OS_FAMILY_linux

 # include "os_linux.inline.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_solaris

 # include "os_solaris.inline.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_windows

 # include "os_windows.inline.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_bsd

 # include "os_bsd.inline.hpp"

 #endif

 int VM_Version::_features = VM_Version::unknown_m;

 const char* VM_Version::_features_str = "";

 void VM_Version::initialize() {

   _features = determine_features();

   //no need, Abstract_VM_Version already define it as false

   _supports_cx8 = true;

   //////////////////////add some other feature here//////////////////

   if (UseG1GC && FLAG_IS_DEFAULT(MaxGCPauseMillis)) {

     FLAG_SET_CMDLINE(uintx, MaxGCPauseMillis, 650);

   }

 #ifdef COMPILER2

   if (MaxVectorSize > 0) {

     if (!is_power_of_2(MaxVectorSize)) {

       warning("MaxVectorSize must be a power of 2");

       MaxVectorSize = 8;

     }

     if (MaxVectorSize > 0 && supports_ps()) {

       MaxVectorSize = 8;

     }

   }

   //

   // Vector optimization of MIPS works in most cases, but cannot pass hotspot/test/compiler/6340864/TestFloatVect.java.

   // Vector optimization was closed by default.

   // The reasons:

   // 1. The kernel does not have emulation of PS instructions yet, so the emulation of PS instructions must be done in JVM, see JVM_handle_linux_signal.

   // 2. It seems the gcc4.4.7 had some bug related to ucontext_t, which is used in signal handler to emulate PS instructions.

   //

   if (FLAG_IS_DEFAULT(MaxVectorSize)) {

     MaxVectorSize = 0;

   }

   if (is_gs464e()) {

     if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstructionMIPS64)) {

       FLAG_SET_DEFAULT(UseCountTrailingZerosInstructionMIPS64, 1);

     }

   } else if (UseCountTrailingZerosInstructionMIPS64) {

     if (!FLAG_IS_DEFAULT(UseCountTrailingZerosInstructionMIPS64))

       warning("Only 3A2000/3000 CPUs support UseCountTrailingZerosInstructionMIPS64");

     FLAG_SET_DEFAULT(UseCountTrailingZerosInstructionMIPS64, 0);

   }

 #endif

   UseSSE = 0; // Only on x86 and x64

   if (is_loongson()) {

     if (FLAG_IS_DEFAULT(UseLoongsonISA)) {

       FLAG_SET_DEFAULT(UseLoongsonISA, 1);

     }

   } else if (UseLoongsonISA) {

     if (!FLAG_IS_DEFAULT(UseLoongsonISA))

       warning("Only Loongson CPUs support LoongISA");

     FLAG_SET_DEFAULT(UseLoongsonISA, 0);

   }

   if (is_gs464e()) {

     if (FLAG_IS_DEFAULT(Use3A2000)) {

       FLAG_SET_DEFAULT(Use3A2000, 1);

     }

   } else if (Use3A2000) {

     if (!FLAG_IS_DEFAULT(Use3A2000))

       warning("Only 3A2000/3000 CPUs support this option");

     FLAG_SET_DEFAULT(Use3A2000, 0);

   }

   if (is_gs464()) {

     if (FLAG_IS_DEFAULT(UseSyncLevel)) {

       FLAG_SET_DEFAULT(UseSyncLevel, 1000);

     }

   }

   if (is_gs464e() || is_gs464v()) {

     if (FLAG_IS_DEFAULT(UseSyncLevel)) {

       FLAG_SET_DEFAULT(UseSyncLevel, 2000);

     }

   }

   if (TieredCompilation) {

     if (!FLAG_IS_DEFAULT(TieredCompilation))

       warning("TieredCompilation not supported");

     FLAG_SET_DEFAULT(TieredCompilation, false);

   }

   char buf[256];

   bool is_unknown_loongson_cpu = is_loongson() && !is_gs464() && !is_gs464e() && !is_gs464v() && !is_gs264();

   jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s, UseSyncLevel:%d",

               (has_l2_cache() ?  ", has_l2_cache" : ""),

               (has_16k_page() ?  ", has_16k_page" : ""),

               (is_loongson()  ?  ", MIPS-compatible Loongson CPU"  : "MIPS"),

               (is_gs464()     ?  ", GS464 (3A1000/3B1500)" : ""),

               (is_gs464e()    ?  ", GS464E (3A2000/3A3000/3B2000/3B3000)" : ""),

               (is_gs464v()    ?  ", GS464V (3A4000/3B4000)" : ""),

               (is_gs264()     ?  ", GS264 (2K1000)" : ""),

               (is_unknown_loongson_cpu ?  ", Unknown Loongson CPU" : ""),

               (UseLoongsonISA ?  ", UseLoongsonISA" : ""),

               (UseCountTrailingZerosInstructionMIPS64 ? ", UseCountTrailingZerosInstructionMIPS64" : ""),

               (Use3A2000      ?  ", Use3A2000" : ""),

               UseSyncLevel);

   // buf is started with ", " or is empty

   _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);

   if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {

     FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1);

   }

   if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) {

     FLAG_SET_DEFAULT(AllocatePrefetchLines, 1);

   }

   if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize)) {

     FLAG_SET_DEFAULT(AllocatePrefetchStepSize, 64);

   }

   if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {

     FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64);

   }

   if (FLAG_IS_DEFAULT(AllocateInstancePrefetchLines)) {

     FLAG_SET_DEFAULT(AllocateInstancePrefetchLines, 1);

   }

   if (UseSHA) {

     warning("SHA instructions are not available on this CPU");

     FLAG_SET_DEFAULT(UseSHA, false);

   }

   if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {

     warning("SHA intrinsics are not available on this CPU");

     FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);

     FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);

     FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);

   }

   NOT_PRODUCT( if (PrintMiscellaneous && Verbose) print_features(); );

 }

 void VM_Version::print_features() {

   tty->print_cr("Version: %s", cpu_features());

 }

 int VM_Version::determine_features() {

   //////////////////////add some other feature here//////////////////

   int features = platform_features(unknown_m);

   //spt_16k_page_m;

   return features;

 }

 static int saved_features = 0;

 void VM_Version::allow_all() {

   saved_features = _features;

   _features      = all_features_m;

 }

 void VM_Version::revert() {

   _features = saved_features;

 }