duke@435: /*
twisti@1734:  * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // This file holds the platform specific parts of the StubRoutines
duke@435: // definition. See stubRoutines.hpp for a description on how to
duke@435: // extend it.
duke@435: 
duke@435: 
duke@435: // So unfortunately c2 will call with a pc from a frame object
duke@435: // (already adjusted) and a raw pc (unadjusted), so we need to check both.
duke@435: // It didn't use to be like this before adapter removal.
duke@435: static bool returns_to_call_stub(address return_pc)   {
duke@435:   return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
duke@435:           (return_pc == _call_stub_return_address );
duke@435: }
duke@435: 
duke@435: enum /* platform_dependent_constants */ {
duke@435:   // %%%%%%%% May be able to shrink this a lot
twisti@1734:   code_size1 = 20000,           // simply increase if too small (assembler will crash if too small)
twisti@1734:   code_size2 = 20000            // simply increase if too small (assembler will crash if too small)
twisti@1734: };
twisti@1734: 
twisti@1734: // MethodHandles adapters
twisti@1734: enum method_handles_platform_dependent_constants {
twisti@1734:   method_handles_adapters_code_size = 5000
duke@435: };
duke@435: 
duke@435: class Sparc {
duke@435:  friend class StubGenerator;
duke@435: 
duke@435:  public:
duke@435:   enum { nof_instance_allocators = 10 };
duke@435: 
duke@435:   // allocator lock values
duke@435:   enum {
duke@435:     unlocked = 0,
duke@435:     locked   = 1
duke@435:   };
duke@435: 
duke@435:   enum {
duke@435:     v8_oop_lock_ignore_bits = 2,
duke@435:     v8_oop_lock_bits = 4,
duke@435:     nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),
duke@435:     v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),
duke@435:     v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits
duke@435:   };
duke@435: 
duke@435:   static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
duke@435: 
duke@435:  private:
duke@435:   static address _test_stop_entry;
duke@435:   static address _stop_subroutine_entry;
duke@435:   static address _flush_callers_register_windows_entry;
duke@435: 
duke@435:   static int _atomic_memory_operation_lock;
duke@435: 
duke@435:   static address _partial_subtype_check;
duke@435: 
duke@435:  public:
duke@435:   // %%% global lock for everyone who needs to use atomic_compare_and_exchange
duke@435:   // %%% or atomic_increment -- should probably use more locks for more
duke@435:   // %%% scalability-- for instance one for each eden space or group of
duke@435: 
duke@435:   // address of the lock for atomic_compare_and_exchange
duke@435:   static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
duke@435: 
duke@435:   // accessor and mutator for _atomic_memory_operation_lock
duke@435:   static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }
duke@435:   static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }
duke@435: 
duke@435:   // test assembler stop routine by setting registers
duke@435:   static void (*test_stop_entry()) ()                     { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
duke@435: 
duke@435:   // a subroutine for debugging assembler code
duke@435:   static address stop_subroutine_entry_address()          { return (address)&_stop_subroutine_entry; }
duke@435: 
duke@435:   // flushes (all but current) register window
duke@435:   static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
duke@435: 
duke@435:   static address partial_subtype_check()                  { return _partial_subtype_check; }
duke@435: };