Added ordered_list driver and some parts of init ram disk

kernel/drivers/initrd.h

@@ -0,0 +1,29 @@
+#ifndef INITRD_H
+#define INITRD_H
+/* Ramdisk is a file system that is loaded along with the kernel
+ * and it usually contains configuration files or file system drivers.
+ * It is used BEFORE partitions are being mounted*/
+
+#include <stdint.h>
+#include "../libc/string.h"
+#include "fs.h"
+
+typedef struct {
+    uint32_t nfiles; // Number of files in the ramdisk
+} initrd_header_t;
+
+typedef struct {
+    uint8_t magic; // Magic number for error checking
+    int8_t name[64]; // Filename
+    uint32_t offset;
+    uint32_t length; // Length of the file
+} initrd_file_header_t;
+
+// Function to initialize initrd, we'll pass the multiboot
+// module as parameter
+fs_node_t *init_ramdisk(uint32_t multiboot_location);
+static uint32_t initrd_read(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
+static struct dirent *initrd_readdir(fs_node_t *node, uint32_t index);
+static fs_node_t *initrd_finddir(fs_node_t *node, uint8_t *name);
+
+#endif