1 /*
   2  * Copyright (c) 1998, 2010, 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 OS_CPU_SOLARIS_X86_VM_THREADLS_SOLARIS_X86_HPP
  26 #define OS_CPU_SOLARIS_X86_VM_THREADLS_SOLARIS_X86_HPP
  27 
  28 // Processor dependent parts of ThreadLocalStorage

  29 
  30 private:
  31   static Thread* _get_thread_cache[];  // index by [(raw_id>>9)^(raw_id>>20) % _pd_cache_size]
  32   static Thread* get_thread_via_cache_slowly(uintptr_t raw_id, int index);
  33 
  34   NOT_PRODUCT(static int _tcacheHit;)
  35   NOT_PRODUCT(static int _tcacheMiss;)
  36 
  37 public:
  38   // Cache hit/miss statistics
  39   static void print_statistics() PRODUCT_RETURN;
  40 
  41   enum Constants {
  42 #ifdef AMD64
  43     _pd_cache_size         =  256*2   // projected typical # of threads * 2
  44 #else
  45     _pd_cache_size         =  128*2   // projected typical # of threads * 2
  46 #endif // AMD64
  47   };
  48 
  49   enum pd_tlsAccessMode {
  50      pd_tlsAccessUndefined      = -1,
  51      pd_tlsAccessSlow           = 0,
  52      pd_tlsAccessIndirect       = 1,
  53      pd_tlsAccessDirect         = 2
  54   } ;
  55 
  56   static void set_thread_in_slot (Thread *) ;
  57 
  58   static pd_tlsAccessMode pd_getTlsAccessMode () ;
  59   static ptrdiff_t pd_getTlsOffset () ;
  60 
  61   static uintptr_t pd_raw_thread_id() {
  62 #ifdef _GNU_SOURCE
  63 #ifdef AMD64
  64     uintptr_t rv;
  65     __asm__ __volatile__ ("movq %%fs:0, %0" : "=r"(rv));
  66     return rv;
  67 #else
  68     return gs_thread();
  69 #endif // AMD64
  70 #else  //_GNU_SOURCE
  71     return _raw_thread_id();
  72 #endif //_GNU_SOURCE
  73   }
  74 
  75   static int pd_cache_index(uintptr_t raw_id) {
  76     // Copied from the sparc version. Dave said it should also work fine
  77     // for solx86.
  78     int ix = (int) (((raw_id >> 9) ^ (raw_id >> 20)) % _pd_cache_size);
  79     return ix;
  80   }
  81 
  82   // Java Thread
  83   static inline Thread* thread();
  84 
  85 #endif // OS_CPU_SOLARIS_X86_VM_THREADLS_SOLARIS_X86_HPP
--- EOF ---