dev: implement block device registration

include/socks/device.h

@@ -23,6 +23,7 @@ struct tty_device;
 
 #define INPUT_DEVICE_EVENT_QUEUE_SIZE 128
 #define INPUT_DEVICE_MAX 4096
+#define BLOCK_DEVICE_MAX 4096
 #define FRAMEBUFFER_DEVICE_MAX 4096
 
 #define BLOCK_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_BLOCK ? &(dev)->blk : NULL)
@@ -80,6 +81,9 @@ struct framebuffer_device_ops {
 
 struct block_device {
 	struct block_device_ops *b_ops;
+	unsigned int b_id;
+	unsigned int sector_size;
+	sectors_t capacity;
 };
 
 struct char_device {
@@ -161,6 +165,11 @@ struct driver {
 	struct driver_ops *drv_ops;
 };
 
+struct iovec {
+	void *io_buf;
+	size_t io_len;
+};
+
 extern kern_status_t device_init(void);
 extern struct device *root_device(void);
 extern struct device *misc_device(void);

include/socks/types.h

@@ -7,6 +7,7 @@
 
 typedef uintptr_t phys_addr_t;
 typedef uint64_t cycles_t;
+typedef uint64_t sectors_t;
 
 typedef unsigned int umode_t;