kernel2/include/ioport.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 #include <stdint.h>
  20
  21 #define IOPORT_ISREG(iopb,port) ((*(((int*)iopb)+(port/sizeof(int))))&(1<<(port%sizeof(int))))
  22 #define IOPORT_REG(iopb,port)   (*(((int*)iopb)+(port/sizeof(int))) |= 1<<(port%sizeof(int)))
  23 #define IOPORT_UNREG(iopb,port) (*(((int*)iopb)+(port/sizeof(int))) &= ~(1<<(port%sizeof(int))))
  24
  25 #define IOPORT_MAXNUM 0x10000
  26
  27 int *iopb_general;
  28
  29 static inline uint8_t inb(uint16_t _port) {
  30   uint8_t _result;
  31   __asm__("inb %1, %0":"=a"(_result):"Nd"(_port));
  32   return _result;
  33 }
  34
  35 static inline uint16_t inw(uint16_t _port) {
  36   uint16_t _result;
  37   __asm__("inw %1, %0":"=a"(_result):"Nd"(_port));
  38   return _result;
  39 }
  40
  41 static inline uint32_t inl(uint16_t _port) {
  42   uint32_t _result;
  43   __asm__("inl %1, %0":"=a"(_result):"Nd"(_port));
  44   return _result;
  45 }
  46
  47 static inline void outw(uint16_t _port,uint16_t _data) {
  48   __asm__("outw %0, %1"::"a"(_data),"Nd"(_port));
  49 }
  50
  51 static inline void outb(uint16_t _port,uint8_t _data) {
  52   __asm__("outb %0, %1"::"a"(_data),"Nd"(_port));
  53 }
  54
  55 static inline void outl(uint16_t _port,uint32_t _data) {
  56   __asm__("outl %0, %1"::"a"(_data),"Nd" (_port));
  57 }
  58
  59 int ioport_init();
  60 int ioport_reg(unsigned int port);
  61 int ioport_unreg(unsigned int port);