Integrate uACPI

kernel/hal/x86_64/io.c

@@ -0,0 +1,28 @@
+#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));
+}