kernel2/include/pic.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _PIC_H_
  20 #define _PIC_H_
  21
  22 #define PIC1                        0x20     // IO base address for master PIC
  23 #define PIC2                        0xA0     // IO base address for slave PIC
  24 #define PIC1_COMMAND                PIC1
  25 #define PIC1_DATA                   (PIC1+1)
  26 #define PIC2_COMMAND                PIC2
  27 #define PIC2_DATA                   (PIC2+1)
  28 #define PIC_EOI                     0x20     // End - of - interrupt command code
  29 #define ICW1_ICW4                   0x01     // ICW4 (not) needed
  30 #define ICW1_SINGLE                 0x02     // Single (cascade) mode
  31 #define ICW1_INTERVAL4              0x04     // Call address interval 4 (8)
  32 #define ICW1_LEVEL                  0x08     // Level triggered (edge) mode
  33 #define ICW1_INIT                   0x10     // Initialization - required!
  34 #define ICW4_8086                   0x01     // 8086/88 (MCS-80/85) mode
  35 #define ICW4_AUTO                   0x02     // Auto (normal) EOI
  36 #define ICW4_BUF_SLAVE              0x08     // Buffered mode/slave
  37 #define ICW4_BUF_MASTER             0x0C     // Buffered mode/master
  38 #define ICW4_SFNM                   0x10     // Special fully nested (not)
  39
  40 #define PIT_CHANNELS                0x40     // Channel ports of PIT
  41 #define PIT_FREQ                    1193180  // Frequency of PIT
  42
  43 int pic_init();
  44 unsigned int pic_getmask(int irq);
  45 void pic_setmask(int irq,unsigned int mask);
  46 void pic_eoi(int irq);
  47 int pic_pit_setinterval(int channel,unsigned int interval);
  48
  49 #endif