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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2008 coresystems GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#ifndef _ARCH_IO_H
#define _ARCH_IO_H
#include <inttypes.h>
/*
* readb/w/l writeb/w/l are deprecated. use read8/16/32 and write8/16/32
* instead for future development.
*
* TODO: make the existing code use read8/16/32 and write8/16/32 then remove
* readb/w/l and writeb/w/l.
*/
#define readb(_a) (*(volatile const unsigned char *) (_a))
#define readw(_a) (*(volatile const unsigned short *) (_a))
#define readl(_a) (*(volatile const unsigned int *) (_a))
#define writeb(_v, _a) (*(volatile unsigned char *) (_a) = (_v))
#define writew(_v, _a) (*(volatile unsigned short *) (_a) = (_v))
#define writel(_v, _a) (*(volatile unsigned int *) (_a) = (_v))
static inline __attribute__((always_inline)) uint8_t read8(const volatile void *addr)
{
return *((volatile uint8_t *)(addr));
}
static inline __attribute__((always_inline)) uint16_t read16(const volatile void *addr)
{
return *((volatile uint16_t *)(addr));
}
static inline __attribute__((always_inline)) uint32_t read32(const volatile void *addr)
{
return *((volatile uint32_t *)(addr));
}
static inline __attribute__((always_inline)) uint64_t read64(const volatile void *addr)
{
return *((volatile uint64_t *)(addr));
}
static inline __attribute__((always_inline)) void write8(volatile void *addr, uint8_t value)
{
*((volatile uint8_t *)(addr)) = value;
}
static inline __attribute__((always_inline)) void write16(volatile void *addr, uint16_t value)
{
*((volatile uint16_t *)(addr)) = value;
}
static inline __attribute__((always_inline)) void write32(volatile void *addr, uint32_t value)
{
*((volatile uint32_t *)(addr)) = value;
}
static inline __attribute__((always_inline)) void write64(volatile void *addr, uint64_t value)
{
*((volatile uint64_t *)(addr)) = value;
}
static inline unsigned int inl(int port)
{
unsigned long val;
__asm__ __volatile__("inl %w1, %0" : "=a"(val) : "Nd"(port));
return val;
}
static inline unsigned short inw(int port)
{
unsigned short val;
__asm__ __volatile__("inw %w1, %w0" : "=a"(val) : "Nd"(port));
return val;
}
static inline unsigned char inb(int port)
{
unsigned char val;
__asm__ __volatile__("inb %w1, %b0" : "=a"(val) : "Nd"(port));
return val;
}
static inline void outl(unsigned int val, int port)
{
__asm__ __volatile__("outl %0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outw(unsigned short val, int port)
{
__asm__ __volatile__("outw %w0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outb(unsigned char val, int port)
{
__asm__ __volatile__("outb %b0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outsl(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsl" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void outsw(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsw" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void outsb(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsb" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void insl(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insl" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
static inline void insw(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insw" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
static inline void insb(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insb" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
#endif
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