/*
* Copyright (c) 2006 Ondrej Palkovsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file
* @ingroup libcia32, libcamd64
*/
#ifndef _LIBC_ia32_DDI_H_
#define _LIBC_ia32_DDI_H_
#include <ddi.h>
#define IO_SPACE_BOUNDARY ((void *) (64 * 1024))
static inline uint8_t arch_pio_read_8(const ioport8_t *port)
{
if (port < (ioport8_t *) IO_SPACE_BOUNDARY) {
uint8_t val;
asm volatile (
"inb %w[port], %b[val]\n"
: [val] "=a" (val)
: [port] "d" (port)
);
return val;
} else
return (uint8_t) *port;
}
static inline uint16_t arch_pio_read_16(const ioport16_t *port)
{
if (port < (ioport16_t *) IO_SPACE_BOUNDARY) {
uint16_t val;
asm volatile (
"inw %w[port], %w[val]\n"
: [val] "=a" (val)
: [port] "d" (port)
);
return val;
} else
return (uint16_t) *port;
}
static inline uint32_t arch_pio_read_32(const ioport32_t *port)
{
if (port < (ioport32_t *) IO_SPACE_BOUNDARY) {
uint32_t val;
asm volatile (
"inl %w[port], %[val]\n"
: [val] "=a" (val)
: [port] "d" (port)
);
return val;
} else
return (uint32_t) *port;
}
static inline uint64_t arch_pio_read_64(const ioport64_t *port)
{
return (uint64_t) *port;
}
static inline void arch_pio_write_8(ioport8_t *port, uint8_t val)
{
if (port < (ioport8_t *) IO_SPACE_BOUNDARY) {
asm volatile (
"outb %b[val], %w[port]\n"
:: [val] "a" (val), [port] "d" (port)
);
} else
*port = val;
}
static inline void arch_pio_write_16(ioport16_t *port, uint16_t val)
{
if (port < (ioport16_t *) IO_SPACE_BOUNDARY) {
asm volatile (
"outw %w[val], %w[port]\n"
:: [val] "a" (val), [port] "d" (port)
);
} else
*port = val;
}
static inline void arch_pio_write_32(ioport32_t *port, uint32_t val)
{
if (port < (ioport32_t *) IO_SPACE_BOUNDARY) {
asm volatile (
"outl %[val], %w[port]\n"
:: [val] "a" (val), [port] "d" (port)
);
} else
*port = val;
}
static inline void arch_pio_write_64(ioport64_t *port, uint64_t val)
{
*port = val;
}
#endif