/*
 * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
 * Copyright 2007-2008 Reservoir Labs, Inc.  All Rights Reserved.
 * Copyright 2010 Lemote, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *  
 */

// Processor dependent parts of ThreadLocalStorage
//only the low 2G space for user program in Linux
  
#define SP_BITLENGTH  31
#define PAGE_SHIFT    12
#define PAGE_SIZE     (1UL << PAGE_SHIFT)
  
static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)]; 
static int _sp_map_low;
static int _sp_map_high;
			  
public:
  static Thread** sp_map_addr() { return _sp_map; }
  static int sp_map_low() { return _sp_map_low; }
  static int sp_map_high() { return _sp_map_high; }

  static Thread* thread() {
	  uintptr_t sp; 
		__asm__ volatile ("addi %0, $29, 0" : "=r" (sp));
		return _sp_map[sp >> PAGE_SHIFT];
	}
/*
public:

  static Thread* thread()
  {
    return (Thread*) os::thread_local_storage_at(thread_index());
  }
 */