/* * 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)) 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 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