Karina
42 lines
820 B
C
42 lines
820 B
C
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
// Copyright (c) 2025 0xKarinyash
|
|
|
|
#ifndef IO_H
|
|
#define IO_H
|
|
|
|
#define MASTER_COMMAND 0x20
|
|
#define MASTER_DATA 0x21
|
|
#define SLAVE_COMMAND 0xA0
|
|
#define SLAVE_DATA 0xA1
|
|
|
|
static inline void outb(unsigned short port, unsigned char val) {
|
|
__asm__ volatile(
|
|
"outb %0, %1"
|
|
:
|
|
: "a"(val),
|
|
"Nd"(port) );
|
|
}
|
|
|
|
static inline unsigned char inb(unsigned short port) {
|
|
unsigned char ret;
|
|
__asm__ volatile(
|
|
"inb %1, %0"
|
|
: "=a"(ret)
|
|
: "Nd"(port)
|
|
);
|
|
|
|
return ret;
|
|
}
|
|
|
|
// sending junk to 0x80 (unused) to skip few tacts
|
|
// not ideal i know
|
|
static inline void io_wait() {
|
|
outb(0x80, 0x0);
|
|
}
|
|
|
|
static inline void outb_wait(unsigned short port, unsigned char val) {
|
|
outb(port, val);
|
|
io_wait();
|
|
}
|
|
|
|
#endif |