86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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Copyright 2025 Kamil Kowalczyk
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions 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. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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“AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <libk/types.h>
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#include <sys/ioport.h>
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uint8_t ioport_in8(uint16_t port) {
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uint8_t r;
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__asm__ volatile("inb %1, %0" : "=a"(r) : "dN"(port));
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return r;
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}
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void ioport_out8(uint16_t port, uint8_t value) {
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__asm__ volatile("outb %1, %0" :: "dN"(port), "a"(value));
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}
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uint16_t ioport_in16(uint16_t port) {
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uint16_t r;
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__asm__ volatile("in %%dx, %%ax" : "=a"(r) : "d"(port));
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return r;
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}
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void ioport_out16(uint16_t port, uint16_t value) {
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__asm__ volatile("out %%ax, %%dx" :: "a"(value), "d"(port));
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}
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uint32_t ioport_in32(uint16_t port) {
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uint32_t r;
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__asm__ volatile("inl %%dx, %%eax" : "=a"(r) : "d"(port));
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return r;
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}
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void ioport_out32(uint16_t port, uint32_t value) {
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__asm__ volatile("outl %%eax, %%dx" :: "d"(port), "a"(value));
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}
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void ioport_ins16(uint16_t port, void *addr, int cnt) {
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__asm__ volatile(
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"cld; rep insw"
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: "+D"(addr), "+c"(cnt)
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: "d"(port)
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: "memory", "cc"
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);
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}
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void ioport_outs16(uint16_t port, const void *addr, int cnt) {
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__asm__ volatile(
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"cld; rep outsw"
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: "+S"(addr), "+c"(cnt)
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: "d"(port)
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: "memory", "cc"
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);
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}
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void ioport_wait(void) {
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ioport_out8(0x80, 0);
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}
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