minix/lib/libsys/sys_in.c

22 lines
598 B
C
Raw Normal View History

2005-04-21 16:53:53 +02:00
#include "syslib.h"
/*===========================================================================*
* sys_in *
*===========================================================================*/
2012-03-25 20:25:53 +02:00
int sys_in(port, value, type)
2005-04-21 16:53:53 +02:00
int port; /* port address to read from */
2012-03-05 00:11:41 +01:00
u32_t *value; /* pointer where to store value */
2005-04-21 16:53:53 +02:00
int type; /* byte, word, long */
{
message m_io;
int result;
m_io.DIO_REQUEST = _DIO_INPUT | type;
2005-04-21 16:53:53 +02:00
m_io.DIO_PORT = port;
result = _kernel_call(SYS_DEVIO, &m_io);
2005-04-21 16:53:53 +02:00
*value = m_io.DIO_VALUE;
return(result);
}