1 /* 2 * Copyright (c) 1997, 2011, 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 #ifndef CPU_SPARC_VM_STUBROUTINES_SPARC_HPP 26 #define CPU_SPARC_VM_STUBROUTINES_SPARC_HPP 27 28 // This file holds the platform specific parts of the StubRoutines 29 // definition. See stubRoutines.hpp for a description on how to 30 // extend it. 31 32 33 // So unfortunately c2 will call with a pc from a frame object 34 // (already adjusted) and a raw pc (unadjusted), so we need to check both. 35 // It didn't use to be like this before adapter removal. 36 static bool returns_to_call_stub(address return_pc) { 37 return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) || 38 (return_pc == _call_stub_return_address ); 39 } 40 41 enum /* platform_dependent_constants */ { 42 // %%%%%%%% May be able to shrink this a lot 43 code_size1 = 20000, // simply increase if too small (assembler will crash if too small) 44 code_size2 = 20000 // simply increase if too small (assembler will crash if too small) 45 }; 46 47 class Sparc { 48 friend class StubGenerator; 49 50 public: 51 enum { nof_instance_allocators = 10 }; 52 53 // allocator lock values 54 enum { 55 unlocked = 0, 56 locked = 1 57 }; 58 59 enum { 60 v8_oop_lock_ignore_bits = 2, 61 v8_oop_lock_bits = 4, 62 nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits), 63 v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits), 64 v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits 65 }; 66 67 static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries]; 68 69 private: 70 static address _test_stop_entry; 71 static address _stop_subroutine_entry; 72 static address _flush_callers_register_windows_entry; 73 74 static int _atomic_memory_operation_lock; 75 76 static address _partial_subtype_check; 77 78 public: 79 // %%% global lock for everyone who needs to use atomic_compare_and_exchange 80 // %%% or atomic_increment -- should probably use more locks for more 81 // %%% scalability-- for instance one for each eden space or group of 82 83 // address of the lock for atomic_compare_and_exchange 84 static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; } 85 86 // accessor and mutator for _atomic_memory_operation_lock 87 static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; } 88 static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; } 89 90 // test assembler stop routine by setting registers 91 static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); } 92 93 // a subroutine for debugging assembler code 94 static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; } 95 96 // flushes (all but current) register window 97 static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); } 98 99 static address partial_subtype_check() { return _partial_subtype_check; } 100 }; 101 102 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP