152 lines
4.7 KiB
C
152 lines
4.7 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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* Copyright (C) 2008 coresystems GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARCH_IO_H
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#define _ARCH_IO_H
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#include <inttypes.h>
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/*
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* readb/w/l writeb/w/l are deprecated. use read8/16/32 and write8/16/32
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* instead for future development.
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*
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* TODO: make the existing code use read8/16/32 and write8/16/32 then remove
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* readb/w/l and writeb/w/l.
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*/
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#define readb(_a) (*(volatile const unsigned char *) (_a))
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#define readw(_a) (*(volatile const unsigned short *) (_a))
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#define readl(_a) (*(volatile const unsigned int *) (_a))
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#define writeb(_v, _a) (*(volatile unsigned char *) (_a) = (_v))
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#define writew(_v, _a) (*(volatile unsigned short *) (_a) = (_v))
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#define writel(_v, _a) (*(volatile unsigned int *) (_a) = (_v))
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static inline __attribute__((always_inline)) uint8_t read8(const volatile void *addr)
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{
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return *((volatile uint8_t *)(addr));
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}
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static inline __attribute__((always_inline)) uint16_t read16(const volatile void *addr)
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{
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return *((volatile uint16_t *)(addr));
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}
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static inline __attribute__((always_inline)) uint32_t read32(const volatile void *addr)
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{
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return *((volatile uint32_t *)(addr));
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}
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static inline __attribute__((always_inline)) void write8(volatile void *addr, uint8_t value)
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{
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*((volatile uint8_t *)(addr)) = value;
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}
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static inline __attribute__((always_inline)) void write16(volatile void *addr, uint16_t value)
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{
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*((volatile uint16_t *)(addr)) = value;
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}
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static inline __attribute__((always_inline)) void write32(volatile void *addr, uint32_t value)
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{
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*((volatile uint32_t *)(addr)) = value;
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}
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static inline unsigned int inl(int port)
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{
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unsigned long val;
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__asm__ __volatile__("inl %w1, %0" : "=a"(val) : "Nd"(port));
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return val;
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}
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static inline unsigned short inw(int port)
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{
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unsigned short val;
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__asm__ __volatile__("inw %w1, %w0" : "=a"(val) : "Nd"(port));
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return val;
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}
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static inline unsigned char inb(int port)
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{
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unsigned char val;
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__asm__ __volatile__("inb %w1, %b0" : "=a"(val) : "Nd"(port));
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return val;
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}
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static inline void outl(unsigned int val, int port)
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{
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__asm__ __volatile__("outl %0, %w1" : : "a"(val), "Nd"(port));
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}
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static inline void outw(unsigned short val, int port)
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{
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__asm__ __volatile__("outw %w0, %w1" : : "a"(val), "Nd"(port));
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}
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static inline void outb(unsigned char val, int port)
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{
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__asm__ __volatile__("outb %b0, %w1" : : "a"(val), "Nd"(port));
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}
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static inline void outsl(int port, const void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; outsl" : "+S"(addr), "+c"(count) : "d"(port));
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}
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static inline void outsw(int port, const void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; outsw" : "+S"(addr), "+c"(count) : "d"(port));
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}
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static inline void outsb(int port, const void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; outsb" : "+S"(addr), "+c"(count) : "d"(port));
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}
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static inline void insl(int port, void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; insl" : "+D"(addr), "+c"(count) : "d"(port)
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: "memory");
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}
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static inline void insw(int port, void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; insw" : "+D"(addr), "+c"(count) : "d"(port)
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: "memory");
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}
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static inline void insb(int port, void *addr, unsigned long count)
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{
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__asm__ __volatile__("rep; insb" : "+D"(addr), "+c"(count) : "d"(port)
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: "memory");
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}
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#endif
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