xref: /minix3/minix/lib/libsys/arch/i386/sys_in.c (revision 433d6423c39e34ec4b79c950597bb2d236f886be)
1  #include "syslib.h"
2  
3  /*===========================================================================*
4   *                                sys_in				     *
5   *===========================================================================*/
sys_in(port,value,type)6  int sys_in(port, value, type)
7  int port; 				/* port address to read from */
8  u32_t *value;				/* pointer where to store value */
9  int type;				/* byte, word, long */
10  {
11      message m_io;
12      int result;
13  
14      m_io.m_lsys_krn_sys_devio.request = _DIO_INPUT | type;
15      m_io.m_lsys_krn_sys_devio.port = port;
16  
17      result = _kernel_call(SYS_DEVIO, &m_io);
18      *value = m_io.m_krn_lsys_sys_devio.value;
19      return(result);
20  }
21  
22