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| -rw-r--r-- | sys/include/arch/amd64/io.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/sys/include/arch/amd64/io.h b/sys/include/arch/amd64/io.h new file mode 100644 index 0000000..8b2ff8f --- /dev/null +++ b/sys/include/arch/amd64/io.h @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * 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. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _AMD64_IO_H_ +#define _AMD64_IO_H_ + +#include <sys/types.h> +#include <sys/cdefs.h> + +static inline uint8_t +inb(uint16_t port) +{ + uint8_t result; + __asm__("in %%dx, %%al" : "=a" (result) : "d" (port)); + return result; +} + +static inline void +outb(uint16_t port, uint8_t data) +{ + __asm__("out %%al, %%dx" : :"a" (data), "d" (port)); +} + +static inline void +outw(uint16_t port, uint16_t data) +{ + __ASMV("outw %w0, %w1" : : "a" (data), "Nd" (port)); +} + +static inline uint16_t +inw(uint16_t port) +{ + uint16_t data; + __ASMV("inw %w1, %w0" : "=a" (data) : "Nd" (port)); + return data; +} + +static inline void +outl(uint16_t port, uint32_t data) +{ + __ASMV("outl %0, %w1" : : "a" (data), "Nd" (port)); +} + +static inline uint32_t +inl(uint16_t port) +{ + uint32_t data; + __ASMV("inl %w1, %0" : "=a" (data) : "Nd" (port)); + return data; +} + +#endif /* !_AMD64_IO_H_ */ |