Decouple I/O from HAL

kernel/hal/x86_64/intr.c

@@ -2,7 +2,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "intr.h"
-#include "io.h"
+#include "io/io.h"
 #include "gdt.h"
 #include "hal/hal.h"
 #include "kprintf.h"

kernel/hal/x86_64/io.c

@@ -1,46 +0,0 @@
-#include <stdint.h>
-
-uint8_t io_in8(uint16_t port) {
-  uint8_t r;
-  asm volatile("inb %1, %0" : "=a"(r) : "dN"(port));
-  return r;
-}
-void io_out8(uint16_t port, uint8_t value) {
-  asm volatile("outb %1, %0" :: "dN"(port), "a"(value));
-}
-
-uint16_t io_in16(uint16_t port) {
-  uint16_t r;
-  asm volatile("in %%dx, %%ax" : "=a"(r) : "d"(port));
-  return r;
-}
-void io_out16(uint16_t port, uint16_t value) {
-  asm volatile("out %%ax, %%dx" :: "a"(value), "d"(port));
-}
-
-uint32_t io_in32(uint16_t port) {
-  uint32_t r;
-  asm volatile("inl %%dx, %%eax" : "=a"(r) : "d"(port));
-  return r;
-}
-void io_out32(uint16_t port, uint32_t value) {
-  asm volatile("outl %%eax, %%dx" :: "d"(port), "a"(value));
-}
-
-void io_ins16(uint16_t port, void *addr, int cnt) {
-  asm volatile(
-    "cld; rep insw"
-    : "+D"(addr), "+c"(cnt)
-    : "d"(port)
-    : "memory", "cc"
-  );
-}
-
-void io_outs16(uint16_t port, const void *addr, int cnt) {
-  asm volatile(
-    "cld; rep outsw"
-    : "+S"(addr), "+c"(cnt)
-    : "d"(port)
-    : "memory", "cc"
-  );
-}

kernel/hal/x86_64/io.h

@@ -1,18 +0,0 @@
-#ifndef HAL_IO_H_
-#define HAL_IO_H_
-
-#include <stdint.h>
-
-uint8_t io_in8(uint16_t port);
-void io_out8(uint16_t port, uint8_t value);
-
-uint16_t io_in16(uint16_t port);
-void io_out16(uint16_t port, uint16_t value);
-
-uint32_t io_in32(uint16_t port);
-void io_out32(uint16_t port, uint32_t value);
-
-void io_ins16(uint16_t port, void *addr, int cnt);
-void io_outs16(uint16_t port, const void *addr, int cnt);
-
-#endif // HAL_IO_H_

kernel/hal/x86_64/pic.c

@@ -1,7 +1,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include "pic.h"
-#include "io.h"
+#include "io/io.h"
 #include "intr.h"
 
 void pic_init(void) {

kernel/hal/x86_64/pit.c

@@ -1,6 +1,6 @@
 #include <stdint.h>
 #include "pit.h"
-#include "io.h"
+#include "io/io.h"
 
 #define PIT_COUNTER0      0x40
 #define PIT_CMD           0x43