feat: setup structure for block devices

added ide block device
added mbr block device driver
started fat block device driver

reordered boot
start timer before pci/ide/etc.
enable interrupts earlier

fixed exception from ide controller

cleanup code
more printfs

kernel/fs/blockdev.h

@@ -0,0 +1,71 @@
+//
+// Created by rick on 06-02-21.
+//
+
+#ifndef NEW_KERNEL_BLOCKDEV_H
+#define NEW_KERNEL_BLOCKDEV_H
+
+#include <types.h>
+
+#define BLOCK_DEV_ACCESS_OK  0
+#define BLOCK_DEV_ACCESS_ERR 1
+
+#define BLOCK_DEV_DIRECTION_READ    0
+#define BLOCK_DEV_DIRECTION_WRITE   1
+
+#define BLOCK_DEV_DRIVER_CHECK_OK       0
+#define BLOCK_DEV_DRIVER_CHECK_NO_MATCH 1
+
+#define BLOCK_DEV_REGISTER_DRIVER_OK 0
+#define BLOCK_DEV_REGISTER_DRIVER_FULL 1
+
+#define BLOCK_DEV_REGISTER_OK 0
+#define BLOCK_DEV_REGISTER_FULL 1
+
+
+typedef struct block_device block_device;
+
+typedef u8 (*block_device_driver_check_device)(const block_device *device, u8 *first_sector);
+
+typedef u8 (*block_device_driver_free)(const block_device *device);
+
+typedef u8 (*block_device_access)(const block_device *device, u8 direction, u32 lba, u8 sectors, void *target);
+
+
+typedef struct {
+    char name[16];
+    struct {
+        u8 root_only: 1;
+    } flags;
+    block_device_driver_check_device check_device;
+    block_device_driver_free free_device;
+} block_dev_driver;
+
+typedef struct block_device {
+    struct {
+        u8 present: 1;
+        u8 scanned: 1;
+        u8 unreadable: 1;
+        u8 root_device: 1;
+        u8 driver_installed: 1;
+    } flags;
+    char identifier[16];
+    u32 num_lba;
+    u16 block_size;
+    block_device_access access;
+    block_dev_driver *driver;
+    void *device_info; // pointer to driver defined structure
+    // todo device info
+} block_device;
+
+u8 block_dev_register_driver(block_dev_driver *driver);
+
+u8 block_dev_register(block_device *device);
+
+void block_dev_free(block_device *device);
+
+void block_dev_scan_repeat();
+
+void block_dev_print_info();
+
+#endif //NEW_KERNEL_BLOCKDEV_H