services/interrupt_manager.cpp

   1 /* Quarn OS
   2  *
   3  * Interrupt manager
   4  *
   5  * Copyright (C) 2009 Pawel Dziepak
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (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 along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #include "interrupt_manager.h"
  24 #include "manes/manec.h"
  25 #include "manes/error.h"
  26 #include "arch/low/pit.h"
  27 #include "arch/low/irq.h"
  28
  29 using namespace services;
  30
  31 /* Cache Interrupt Manager */
  32 p<interrupt_manager> im = p<interrupt_manager>::invalid;
  33
  34 void interrupt(int i) {
  35         im->interrupt_called(i);
  36 }
  37
  38 interrupt_manager::interrupt_manager() {
  39         im = this;
  40 }
  41
  42 void interrupt_manager::register_interrupt(unsigned int i, delegate<void> handler) {
  43         if (i == 0x32 || i == 0x33)
  44                 critical("Can not override 0x32 and 0x33 interrupt handlers.");
  45
  46         handlers[i] = handler;
  47
  48         arch::unmask_irq(i - 0x20);
  49 }
  50
  51 void interrupt_manager::free_interrupt(unsigned int i) {
  52         arch::unlock_irqs(i - 0x20);
  53 }
  54
  55 void interrupt_manager::interrupt_called(unsigned int i) {
  56         if (!handlers[i].null())
  57                 handlers[i]();
  58         else
  59                 /* throw */ critical((string)"Unknown interrupt occured: 0x" + string(i,true));
  60 }
  61
  62 void interrupt_manager::register_type() {
  63         manes::manec::get()->register_type<interrupt_manager>("interrupt_manager", "service");
  64 }