port_io.h

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/*****************************************************************************/
/*****************************************************************************/
 
/*
 * (c) 2003-2009 Author(s)
 *     economic rights: Technische Universität Dresden (Germany)
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU Lesser General Public License 2.1.
 * Please see the COPYING-LGPL-2.1 file for details.
 */
 
#ifndef _L4UTIL_PORT_IO_H
#define _L4UTIL_PORT_IO_H
 
/* L4 includes */
#include <l4/sys/l4int.h>
#include <l4/sys/compiler.h>
 
/*****************************************************************************
 *** Prototypes
 *****************************************************************************/
 
EXTERN_C_BEGIN
L4_INLINE l4_uint8_t
l4util_in8(l4_uint16_t port);
 
L4_INLINE l4_uint16_t
l4util_in16(l4_uint16_t port);
 
L4_INLINE l4_uint32_t
l4util_in32(l4_uint16_t port);
 
L4_INLINE void
l4util_ins8(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_ins16(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_ins32(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_out8(l4_uint8_t value, l4_uint16_t port);
 
L4_INLINE void
l4util_out16(l4_uint16_t value, l4_uint16_t port);
 
L4_INLINE void
l4util_out32(l4_uint32_t value, l4_uint16_t port);
 
L4_INLINE void
l4util_outs8(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_outs16(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_outs32(l4_uint16_t port, l4_umword_t addr, l4_umword_t count);
 
L4_INLINE void
l4util_iodelay(void);
 
EXTERN_C_END
 
 
/*****************************************************************************
 *** Implementation
 *****************************************************************************/
 
L4_INLINE l4_uint8_t
l4util_in8(l4_uint16_t port)
{
  l4_uint8_t value;
  asm volatile ("inb %w1, %b0" : "=a" (value) : "Nd" (port));
  return value;
}
 
L4_INLINE l4_uint16_t
l4util_in16(l4_uint16_t port)
{
  l4_uint16_t value;
  asm volatile ("inw %w1, %w0" : "=a" (value) : "Nd" (port));
  return value;
}
 
L4_INLINE l4_uint32_t
l4util_in32(l4_uint16_t port)
{
  l4_uint32_t value;
  asm volatile ("inl %w1, %0" : "=a" (value) : "Nd" (port));
  return value;
}
 
L4_INLINE void
l4util_ins8(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep insb" : "=D"(dummy1), "=c"(dummy2)
         : "d" (port), "D" (addr), "c"(count)
         : "memory");
}
 
L4_INLINE void
l4util_ins16(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep insw" : "=D"(dummy1), "=c"(dummy2)
         : "d" (port), "D" (addr), "c"(count)
         : "memory");
}
 
L4_INLINE void
l4util_ins32(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep insl" : "=D"(dummy1), "=c"(dummy2)
         : "d" (port), "D" (addr), "c"(count)
         : "memory");
}
 
L4_INLINE void
l4util_out8(l4_uint8_t value, l4_uint16_t port)
{
  asm volatile ("outb %b0, %w1" : : "a" (value), "Nd" (port));
}
 
L4_INLINE void
l4util_out16(l4_uint16_t value, l4_uint16_t port)
{
  asm volatile ("outw %w0, %w1" : : "a" (value), "Nd" (port));
}
 
L4_INLINE void
l4util_out32(l4_uint32_t value, l4_uint16_t port)
{
  asm volatile ("outl %0, %w1" : : "a" (value), "Nd" (port));
}
 
L4_INLINE void
l4util_outs8(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep outsb" : "=S"(dummy1), "=c"(dummy2)
          : "d" (port), "S" (addr), "c"(count)
          : "memory");
}
 
L4_INLINE void
l4util_outs16(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep outsw" : "=S"(dummy1), "=c"(dummy2)
          : "d" (port), "S" (addr), "c"(count)
          : "memory");
}
 
L4_INLINE void
l4util_outs32(l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
{
  l4_umword_t dummy1, dummy2;
  asm volatile ("rep outsl" : "=S"(dummy1), "=c"(dummy2)
          : "d" (port), "S" (addr), "c"(count)
          : "memory");
}
 
L4_INLINE void
l4util_iodelay(void)
{
  asm volatile ("outb %al,$0x80");
}
 
#endif