// Definitions for X86 IO port access.
//
// Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#ifndef __IOPORT_H
#define __IOPORT_H

#include "types.h" // u8

#define PORT_DMA_ADDR_2        0x0004
#define PORT_DMA_CNT_2         0x0005
#define PORT_DMA1_MASK_REG     0x000a
#define PORT_DMA1_MODE_REG     0x000b
#define PORT_DMA1_CLEAR_FF_REG 0x000c
#define PORT_DMA1_MASTER_CLEAR 0x000d
#define PORT_PIC1              0x0020
#define PORT_PIC1_DATA         0x0021
#define PORT_PIT_COUNTER0      0x0040
#define PORT_PIT_COUNTER1      0x0041
#define PORT_PIT_COUNTER2      0x0042
#define PORT_PIT_MODE          0x0043
#define PORT_KBD_CTRLB         0x0061
#define PORT_CMOS_INDEX        0x0070
#define PORT_CMOS_DATA         0x0071
#define PORT_DMA_PAGE_2        0x0081
#define PORT_A20               0x0092
#define PORT_PIC2              0x00a0
#define PORT_PIC2_DATA         0x00a1
#define PORT_DMA2_MASK_REG     0x00d4
#define PORT_DMA2_MODE_REG     0x00d6
#define PORT_DMA2_MASTER_CLEAR 0x00da
#define PORT_FD_DOR            0x03f2
#define PORT_FD_STATUS         0x03f4
#define PORT_FD_DATA           0x03f5

// PORT_PIC1 bitdefs
#define PIC1_IRQ5  (1<<5)
// PORT_PIC2 bitdefs
#define PIC2_IRQ8  (1<<0)
#define PIC2_IRQ13 (1<<5)

// PORT_KBD_CTRLB bitdefs
#define KBD_REFRESH (1<<4)


static inline void outb(u8 value, u16 port) {
    __asm__ __volatile__("outb %b0, %w1" : : "a"(value), "Nd"(port));
}
static inline u8 inb(u16 port) {
    u8 value;
    __asm__ __volatile__("inb %w1, %b0" : "=a"(value) : "Nd"(port));
    return value;
}

#endif // ioport.h