1 // Definitions for X86 IO port access.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU GPLv3 license.
9 #include "types.h" // u8
11 #define PORT_DMA_ADDR_2 0x0004
12 #define PORT_DMA_CNT_2 0x0005
13 #define PORT_DMA1_MASK_REG 0x000a
14 #define PORT_DMA1_MODE_REG 0x000b
15 #define PORT_DMA1_CLEAR_FF_REG 0x000c
16 #define PORT_DMA1_MASTER_CLEAR 0x000d
17 #define PORT_PIC1 0x0020
18 #define PORT_PIC1_DATA 0x0021
19 #define PORT_PIT_COUNTER0 0x0040
20 #define PORT_PIT_COUNTER1 0x0041
21 #define PORT_PIT_COUNTER2 0x0042
22 #define PORT_PIT_MODE 0x0043
23 #define PORT_KBD_CTRLB 0x0061
24 #define PORT_CMOS_INDEX 0x0070
25 #define PORT_CMOS_DATA 0x0071
26 #define PORT_DMA_PAGE_2 0x0081
27 #define PORT_A20 0x0092
28 #define PORT_PIC2 0x00a0
29 #define PORT_PIC2_DATA 0x00a1
30 #define PORT_DMA2_MASK_REG 0x00d4
31 #define PORT_DMA2_MODE_REG 0x00d6
32 #define PORT_DMA2_MASTER_CLEAR 0x00da
33 #define PORT_FD_DOR 0x03f2
34 #define PORT_FD_STATUS 0x03f4
35 #define PORT_FD_DATA 0x03f5
38 #define PIC1_IRQ5 (1<<5)
40 #define PIC2_IRQ8 (1<<0)
41 #define PIC2_IRQ13 (1<<5)
43 // PORT_KBD_CTRLB bitdefs
44 #define KBD_REFRESH (1<<4)
47 static inline void outb(u8 value, u16 port) {
48 __asm__ __volatile__("outb %b0, %w1" : : "a"(value), "Nd"(port));
50 static inline u8 inb(u16 port) {
52 __asm__ __volatile__("inb %w1, %b0" : "=a"(value) : "Nd"(port));