libc/include/x86.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   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
  20 #ifndef __X86_H
  21 #define __X86_H
  22
  23
  24 #define M_PIC  0x20     /* I/O for master PIC              */
  25 #define M_IMR  0x21     /* I/O for master IMR              */
  26 #define S_PIC  0xA0     /* I/O for slave PIC               */
  27 #define S_IMR  0xA1     /* I/O for slace IMR               */
  28
  29 #define EOI    0x20     /* EOI command                     */
  30
  31 #define ICW1   0x11     /* Cascade, Edge triggered         */
  32                         /* ICW2 is vector                  */
  33                         /* ICW3 is slave bitmap or number  */
  34 #define ICW4   0x01     /* 8088 mode                       */
  35
  36 #define M_VEC  0x68     /* Vector for master               */
  37 #define S_VEC  0x70     /* Vector for slave                */
  38
  39 #define OCW3_IRR  0x0A  /* Read IRR                        */
  40 #define OCW3_ISR  0x0B  /* Read ISR                        */
  41
  42 #define outb(value,port) \
  43 __asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
  44
  45
  46 #define inb(port) ({ \
  47 unsigned char _v; \
  48 __asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \
  49 _v; \
  50 })
  51
  52 #define outb_p(value,port) \
  53 __asm__ ("outb %%al,%%dx\n" \
  54                 "\tjmp 1f\n" \
  55                 "1:\tjmp 1f\n" \
  56                 "1:"::"a" (value),"d" (port))
  57
  58 #define inb_p(port) ({ \
  59 unsigned char _v; \
  60 __asm__ volatile ("inb %%dx,%%al\n" \
  61         "\tjmp 1f\n" \
  62         "1:\tjmp 1f\n" \
  63         "1:":"=a" (_v):"d" (port)); \
  64 _v; \
  65 })
  66
  67 extern unsigned inportb (unsigned short port);
  68 extern unsigned short inw (unsigned short port);
  69 extern void outw_p (unsigned short v, unsigned short port);
  70 extern void outportb (unsigned port, unsigned val);
  71
  72
  73 extern unsigned disable (void);
  74 extern void enable (void);
  75
  76 extern void enable_irq (unsigned short irq_num);
  77 extern void disable_irq (unsigned short irq_num);
  78
  79 #endif
  80