src/arch/avr32.h

   1 /*
   2  * Copyright (C) 2003, 2004, 2005, 2006, 2007
   3  * Robert Lougher <rob@lougher.org.uk>.
   4  *
   5  * This file is part of JamVM.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2,
  10  * or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  */
  21
  22 #define OS_ARCH "avr32"
  23 //#ifndef DEBUG
  24 //#define DEBUG
  25 //#endif
  26
  27 /* Override default min and max heap sizes.  AVR32 machines are
  28    usually embedded, and the standard defaults are too large. */
  29 #define DEFAULT_MAX_HEAP 8*MB
  30 #define DEFAULT_MIN_HEAP 1*MB
  31
  32 #define HANDLER_TABLE_T static const void
  33 #define DOUBLE_1_BITS 0x3ff0000000000000LL
  34
  35 #define READ_DBL(v,p,l) v = ((u8)p[0]<<56)|((u8)p[1]<<48)|((u8)p[2]<<40) \
  36                             |((u8)p[3]<<32)|((u8)p[4]<<24)|((u8)p[5]<<16) \
  37                             |((u8)p[6]<<8)|(u8)p[7]; p+=8
  38
  39 //extern void setDoublePrecision();
  40 #define FPU_HACK
  41
  42 //see C:\Cygwin\usr\local\avr32-linux\include\bits\atomicity.h
  43 //see http://www.avr32linux.org/twiki/bin/view/Main/AtomicOperations
  44 //see http://www.mail-archive.com/uclibc@uclibc.org/msg00914.html
  45 //http://www.avr32linux.org/twiki/pub/Main/MicroClibcPatches/uClibc-0.9.28-avr32-20060621.patch
  46 //http://www.google.com/codesearch?hl=en&q=+cmpxchg+avr32+show:WwwDfOAAdbA:L2BlPHy6h_g:nY7RakaTOnE&sa=N&cd=1&ct=rc&cs_p=http://gobo.calica.com/packages/official/Linux--2.6.20.4-r1--i686.tar.bz2&cs_f=Linux/2.6.20.4/Resources/Unmanaged/Files/Compile/Sources/linux-2.6.20.4/include/asm-avr32/system.h#first
  47
  48 /*
  49  * The original avr32 compare_and_swap is different from
  50  * all other versions (arm, ppc, i386), even varying from
  51  * implementation in uClibc. It simply returns the value
  52  * stored in the addr, which makes  no sense for the lock.
  53  * Replace with the in uClibc implementation
  54  */
  55 extern int avr32_compare_and_swap(uintptr_t* addr, uintptr_t old_val,
  56                                   uintptr_t new_val);
  57
  58 #define COMPARE_AND_SWAP(addr, old_val, new_val)        \
  59     avr32_compare_and_swap(addr, old_val, new_val)
  60
  61 #define FLUSH_CACHE(addr, length)
  62
  63 #define LOCKWORD_READ(addr) *addr
  64 #define LOCKWORD_WRITE(addr, value) *addr = value
  65 #define LOCKWORD_COMPARE_AND_SWAP(addr, old_val, new_val) \
  66         COMPARE_AND_SWAP(addr, old_val, new_val)
  67
  68 #define UNLOCK_MBARRIER() __asm__ __volatile__ ("" ::: "memory")
  69 #define JMM_LOCK_MBARRIER() __asm__ __volatile__ ("" ::: "memory")
  70 #define JMM_UNLOCK_MBARRIER() __asm__ __volatile__ ("" ::: "memory")
  71
  72 //TODO: lto
  73 #define MBARRIER() __asm__ __volatile__ ("" ::: "memory")
  74 //#define MBARRIER() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" ::: "memory")