iodev/extfpuirq.cc

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: extfpuirq.cc,v 1.10 2008/07/26 08:02:27 vruppert Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //  Copyright (C) 2002  MandrakeSoft S.A.
   6 //
   7 //    MandrakeSoft S.A.
   8 //    43, rue d'Aboukir
   9 //    75002 Paris - France
  10 //    http://www.linux-mandrake.com/
  11 //    http://www.mandrakesoft.com/
  12 //
  13 //  This library is free software; you can redistribute it and/or
  14 //  modify it under the terms of the GNU Lesser General Public
  15 //  License as published by the Free Software Foundation; either
  16 //  version 2 of the License, or (at your option) any later version.
  17 //
  18 //  This library is distributed in the hope that it will be useful,
  19 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 //  Lesser General Public License for more details.
  22 //
  23 //  You should have received a copy of the GNU Lesser General Public
  24 //  License along with this library; if not, write to the Free Software
  25 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26
  27 //
  28 // External circuit for MSDOS compatible FPU exceptions
  29 //
  30
  31 // Define BX_PLUGGABLE in files that can be compiled into plugins.  For
  32 // platforms that require a special tag on exported symbols, BX_PLUGGABLE
  33 // is used to know when we are exporting symbols and when we are importing.
  34 #define BX_PLUGGABLE
  35
  36 #include "iodev.h"
  37
  38 #define LOG_THIS theExternalFpuIrq->
  39
  40 bx_extfpuirq_c *theExternalFpuIrq = NULL;
  41
  42 int libextfpuirq_LTX_plugin_init(plugin_t *plugin, plugintype_t type, int argc, char *argv[])
  43 {
  44   theExternalFpuIrq = new bx_extfpuirq_c();
  45   BX_REGISTER_DEVICE_DEVMODEL(plugin, type, theExternalFpuIrq, BX_PLUGIN_EXTFPUIRQ);
  46   return(0); // Success
  47 }
  48
  49 void libextfpuirq_LTX_plugin_fini(void)
  50 {
  51   delete theExternalFpuIrq;
  52 }
  53
  54 bx_extfpuirq_c::bx_extfpuirq_c(void)
  55 {
  56   put("EFIRQ");
  57   settype(EXTFPUIRQLOG);
  58 }
  59
  60 bx_extfpuirq_c::~bx_extfpuirq_c(void)
  61 {
  62   BX_DEBUG(("Exit"));
  63 }
  64
  65 void bx_extfpuirq_c::init(void)
  66 {
  67   // called once when bochs initializes
  68   DEV_register_iowrite_handler(this, write_handler, 0x00F0, "External FPU IRQ", 1);
  69   DEV_register_irq(13, "External FPU IRQ");
  70 }
  71
  72 void bx_extfpuirq_c::reset(unsigned type)
  73 {
  74   // We should handle IGNNE here
  75   DEV_pic_lower_irq(13);
  76 }
  77
  78 // static IO port write callback handler
  79 // redirects to non-static class handler to avoid virtual functions
  80
  81 void bx_extfpuirq_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
  82 {
  83 #if !BX_USE_EFI_SMF
  84   bx_extfpuirq_c *class_ptr = (bx_extfpuirq_c *) this_ptr;
  85   class_ptr->write(address, value, io_len);
  86 }
  87
  88 void bx_extfpuirq_c::write(Bit32u address, Bit32u value, unsigned io_len)
  89 {
  90 #else
  91   UNUSED(this_ptr);
  92 #endif // !BX_USE_EFI_SMF
  93
  94   // We should handle IGNNE here
  95   DEV_pic_lower_irq(13);
  96 }