diff options
Diffstat (limited to 'payloads/libpayload/include/i386/arch/io.h')
-rw-r--r-- | payloads/libpayload/include/i386/arch/io.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/payloads/libpayload/include/i386/arch/io.h b/payloads/libpayload/include/i386/arch/io.h new file mode 100644 index 0000000000..31a8f88410 --- /dev/null +++ b/payloads/libpayload/include/i386/arch/io.h @@ -0,0 +1,108 @@ +/* + * 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 + +#define readb(_a) (*(volatile unsigned char *) (_a)) +#define readw(_a) (*(volatile unsigned short *) (_a)) +#define readl(_a) (*(volatile unsigned long *) (_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 long *) (_a) = (_v)) + +static inline unsigned long 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 long 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)); +} + +static inline void insw(int port, void *addr, unsigned long count) +{ + __asm__ __volatile__("rep; insw" : "+D"(addr), "+c"(count) : "d"(port)); +} + +static inline void insb(int port, void *addr, unsigned long count) +{ + __asm__ __volatile__("rep; insb" : "+D"(addr), "+c"(count) : "d"(port)); +} + +#endif |