Started fleshing out the storage API

kernel/io/io.cpp

@@ -0,0 +1,76 @@
+#include "io.h"
+
+unsigned char inb_p(unsigned short ){
+        // TODO: implement me!
+        return 0;
+}
+unsigned short inw(unsigned short ){
+// TODO: implement me!
+        return 0;
+}
+unsigned short inw_p(unsigned short ){
+// TODO: implement me!
+        return 0;
+}
+uint32_t inl( int port  ){
+        unsigned int data;
+        asm volatile ("inl %w1, %0": "=a" (data): "d" (port));
+        return data;
+}
+unsigned int inl_p(unsigned short ){
+// TODO: implement me!
+        return 0;
+}
+
+
+void b_p(unsigned char , unsigned short ){
+
+}
+void outw(unsigned short , unsigned short ){
+
+}
+void outw_p(unsigned short , unsigned short ){
+
+}
+
+void outl( int port , uint32_t data ){
+        asm volatile ("outl %0, %1" :: "a" (data), "dn"(port));
+}
+
+
+void outl_p(unsigned int , unsigned short ){
+
+}
+
+void insb(unsigned short , void *,
+        unsigned long ){
+
+        }
+void insw(unsigned short , void *,
+        unsigned long ){
+
+        }
+void insl(unsigned short , void *,
+        unsigned long ){
+
+        }
+void outsb(unsigned short , const void *,
+        unsigned long ){
+
+        }
+void outsw(unsigned short , const void *,
+        unsigned long ){
+
+        }
+void outsl(unsigned short , const void *,
+        unsigned long ){
+
+        }
+
+void io_wait(void)
+{
+    /* TODO: This is probably fragile. */
+    asm volatile ( "jmp 1f\n\t"
+                   "1:jmp 2f\n\t"
+                   "2:" );
+}

kernel/io/io.h

@@ -0,0 +1,40 @@
+#pragma once
+#include <stdint.h>
+
+static inline uint8_t inb(uint16_t port)
+{
+    uint8_t ret;
+    asm volatile ( "inb %1, %0"
+                   : "=a"(ret)
+                   : "Nd"(port) );
+    return ret;
+}
+unsigned char inb_p(unsigned short port);
+unsigned short inw(unsigned short port);
+unsigned short inw_p(unsigned short port);
+uint32_t inl( int port  );
+unsigned int inl_p(unsigned short port);
+
+static inline void outb(uint16_t port, uint8_t val)
+{
+    asm volatile ( "outb %0, %1" : : "a"(val), "Nd"(port) );
+}
+void outb_p(unsigned char value, unsigned short port);
+void outw(unsigned short value, unsigned short port);
+void outw_p(unsigned short value, unsigned short port);
+void outl( int port , uint32_t data );
+void outl_p(unsigned int value, unsigned short port);
+
+void insb(unsigned short port, void *addr,
+        unsigned long count);
+void insw(unsigned short port, void *addr,
+        unsigned long count);
+void insl(unsigned short port, void *addr,
+        unsigned long count);
+void outsb(unsigned short port, const void *addr,
+        unsigned long count);
+void outsw(unsigned short port, const void *addr,
+        unsigned long count);
+void outsl(unsigned short port, const void *addr,
+        unsigned long count);
+void io_wait();