Karina
45 lines
899 B
C
45 lines
899 B
C
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (c) 2026 0xKarinyash
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#pragma once
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#include <types.h>
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enum {
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kIOMasterCommand = 0x20,
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kIOMasterData = 0x21,
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kIOSlaveCommand = 0xA0,
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kIOSlaveData = 0xA1,
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kIOPortWaitAddress = 0x80
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};
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static inline void IOPortWrite8(UInt16 port, UInt8 val) {
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__asm__ volatile(
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"outb %0, %1"
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:
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: "a"(val),
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"Nd"(port) );
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}
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static inline unsigned char IOPortRead8(UInt16 port) {
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unsigned char ret;
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__asm__ volatile(
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"inb %1, %0"
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: "=a"(ret)
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: "Nd"(port)
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);
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return ret;
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}
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// sending junk to 0x80 (unused) to skip few tacts
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// not ideal i know
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static inline void IOSynchronizeBus() {
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IOPortWrite8(kIOPortWaitAddress, 0x0);
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}
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static inline void IOPortWrite8WithWait(UInt16 port, UInt8 val) {
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IOPortWrite8(port, val);
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IOSynchronizeBus();
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}
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