From 57aad98f8f164164e9777ad51c7a38b4d02be97d Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Sat, 13 Sep 2025 19:17:53 -0400 Subject: kernel/amd64: Add port I/O helpers Signed-off-by: Ian Moffett --- src/sys/include/arch/amd64/pio.h | 46 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/sys/include/arch/amd64/pio.h (limited to 'src/sys/include/arch/amd64/pio.h') diff --git a/src/sys/include/arch/amd64/pio.h b/src/sys/include/arch/amd64/pio.h new file mode 100644 index 0000000..d18a50c --- /dev/null +++ b/src/sys/include/arch/amd64/pio.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * 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 the project 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 _MACHINE_PIO_H_ +#define _MACHINE_PIO_H_ + +/* We support AMD64 PIO */ +#define _MACHINE_HAVE_PIO 1 + +#include + +uint8_t inb(uint16_t port); +uint16_t inw(uint16_t port); +uint32_t inl(uint16_t port); + +void outb(uint16_t port, uint8_t val); +void outw(uint16_t port, uint16_t val); +void outl(uint16_t port, uint32_t val); + +#endif /* !_MACHINE_PIO_H_ */ -- cgit v1.2.3