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 /*

  * Copyright (c) 1997, 2011, 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

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  */

 #ifndef CPU_SPARC_VM_STUBROUTINES_SPARC_HPP

 #define CPU_SPARC_VM_STUBROUTINES_SPARC_HPP

 // This file holds the platform specific parts of the StubRoutines

 // definition. See stubRoutines.hpp for a description on how to

 // extend it.

 // So unfortunately c2 will call with a pc from a frame object

 // (already adjusted) and a raw pc (unadjusted), so we need to check both.

 // It didn't use to be like this before adapter removal.

 static bool returns_to_call_stub(address return_pc)   {

   return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||

           (return_pc == _call_stub_return_address );

 }

 enum /* platform_dependent_constants */ {

   // %%%%%%%% May be able to shrink this a lot

   code_size1 = 20000,           // simply increase if too small (assembler will crash if too small)

   code_size2 = 20000            // simply increase if too small (assembler will crash if too small)

 };

 class Sparc {

  friend class StubGenerator;

  public:

   enum { nof_instance_allocators = 10 };

   // allocator lock values

   enum {

     unlocked = 0,

     locked   = 1

   };

   enum {

     v8_oop_lock_ignore_bits = 2,

     v8_oop_lock_bits = 4,

     nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),

     v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),

     v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits

   };

   static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];

  private:

   static address _test_stop_entry;

   static address _stop_subroutine_entry;

   static address _flush_callers_register_windows_entry;

   static int _atomic_memory_operation_lock;

   static address _partial_subtype_check;

  public:

   // %%% global lock for everyone who needs to use atomic_compare_and_exchange

   // %%% or atomic_increment -- should probably use more locks for more

   // %%% scalability-- for instance one for each eden space or group of

   // address of the lock for atomic_compare_and_exchange

   static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }

   // accessor and mutator for _atomic_memory_operation_lock

   static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }

   static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }

   // test assembler stop routine by setting registers

   static void (*test_stop_entry()) ()                     { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }

   // a subroutine for debugging assembler code

   static address stop_subroutine_entry_address()          { return (address)&_stop_subroutine_entry; }

   // flushes (all but current) register window

   static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }

   static address partial_subtype_check()                  { return _partial_subtype_check; }

 };

 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP