87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
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#pragma once
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#include "../../../main.h"
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static inline void outb(uint16_t port, uint8_t val) {
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asm volatile("outb %0, %1" ::"a"(val), "Nd"(port));
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/*There's an outb %al, $imm8 encoding, for compile-time constant port numbers that fit in 8b. (N constraint).
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Wider immediate constants would be truncated at assemble-time (e.g. "i" constraint).
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The outb %al, %dx encoding is the only option for all other cases.
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%1 expands to %dx because port is a uint16_t. %w1 could be used if we had the port number a wider C type*/
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}
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static inline uint8_t inb(uint16_t port) {
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uint8_t ret;
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asm volatile("inb %1, %0"
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: "=a"(ret)
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: "Nd"(port));
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return ret;
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}
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// Wait a very small amount of time (1 to 4 microseconds, generally).
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static inline void io_wait(void) {
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outb(0x80, 0);
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}
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static inline void outb_wait(uint16_t port, uint8_t val) {
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asm volatile("outb %0, %1" ::"a"(val), "Nd"(port));
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/*There's an outb %al, $imm8 encoding, for compile-time constant port numbers that fit in 8b. (N constraint).
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Wider immediate constants would be truncated at assemble-time (e.g. "i" constraint).
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The outb %al, %dx encoding is the only option for all other cases.
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%1 expands to %dx because port is a uint16_t. %w1 could be used if we had the port number a wider C type*/
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asm volatile("outb %al, $0x80");
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}
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#define PIC1 0x20 // IO base address for master PIC
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#define PIC2 0xA0 // IO base address for slave PIC
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#define PIC1_COMMAND 0x20 // Port for Command for master PIC
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#define PIC1_DATA 0x21 // Port for Data for master PIC
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#define PIC2_COMMAND 0xA0 // Port for Command for slave PIC
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#define PIC2_DATA 0xA1 // Port for Data for slave PIC
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#define PIC_CMD_EOI 0x20 // End-Of-Interrupt command
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#define ICW1_ICW4 0x01 // ICW4 (not) needed
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#define ICW1_SINGLE 0x02 // Single (cascade) mode
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#define ICW1_INTERVAL4 0x04 // Call address interval 4 (8)
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#define ICW1_LEVEL 0x08 // Level triggered (edge) mode
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#define ICW1_INIT 0x10 // Initialization - required!
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#define ICW4_8086 0x01 // 8086/88 (MCS-80/85) mode
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#define ICW4_AUTO 0x02 // Auto (normal) EOI
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#define ICW4_BUF_SLAVE 0x08 // Buffered mode/slave
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#define ICW4_BUF_MASTER 0x0C // Buffered mode/master
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#define ICW4_SFNM 0x10 // Special fully nested (not)
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SYSV_ABI void irq_pic_IntHandler(int irq);
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SYSV_ABI void irq_pic_IntHandler20h();
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SYSV_ABI void irq_pic_IntHandler21h();
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SYSV_ABI void irq_pic_IntHandler22h();
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SYSV_ABI void irq_pic_IntHandler23h();
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SYSV_ABI void irq_pic_IntHandler24h();
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SYSV_ABI void irq_pic_IntHandler25h();
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SYSV_ABI void irq_pic_IntHandler26h();
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SYSV_ABI void irq_pic_IntHandler27h();
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SYSV_ABI void irq_pic_IntHandler28h();
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SYSV_ABI void irq_pic_IntHandler29h();
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SYSV_ABI void irq_pic_IntHandler2ah();
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SYSV_ABI void irq_pic_IntHandler2bh();
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SYSV_ABI void irq_pic_IntHandler2ch();
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SYSV_ABI void irq_pic_IntHandler2dh();
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SYSV_ABI void irq_pic_IntHandler2eh();
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SYSV_ABI void irq_pic_IntHandler2fh();
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#ifdef __cplusplus
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}
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#endif
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