kernel: block abstraction and partition table parsing

kernel-src/include/kernel/block.h

@@ -0,0 +1,23 @@
+#ifndef _BLOCK_H
+#define _BLOCK_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define BLOCK_TYPE_DISK 0
+#define BLOCK_TYPE_PART 1
+
+typedef struct {
+	void *private;
+	int type;
+	uintmax_t lbaoffset;
+	size_t blockcapacity;
+	size_t blocksize;
+	int (*write)(void *private, void *buffer, uintmax_t lba, size_t count);
+	int (*read)(void *private, void *buffer, uintmax_t lba, size_t count);
+} blockdesc_t;
+
+void block_register(blockdesc_t *desc, char *name);
+void block_init();
+
+#endif

kernel-src/include/kernel/devfs.h

@@ -11,6 +11,7 @@
 #define DEV_MAJOR_CONSOLE 4
 #define DEV_MAJOR_FB 5
 #define DEV_MAJOR_KEYBOARD 6
+#define DEV_MAJOR_BLOCK 7
 
 typedef struct {
 	int (*open)(int minor, int flags);