[DM/FEATURE] Support simple block layer

1. Disk and blk device management.
2. Support partitions probe auto.
3. Support DFS and user mode fops, ioctl.
4. Add a cmd for blk info.

Signed-off-by: GuEe-GUI <[email protected]>

Author: GuEe-GUI

components/drivers/Kconfig

@@ -21,6 +21,7 @@ rsource "touch/Kconfig"
 rsource "graphic/Kconfig"
 rsource "hwcrypto/Kconfig"
 rsource "wlan/Kconfig"
+rsource "block/Kconfig"
 rsource "virtio/Kconfig"
 rsource "ofw/Kconfig"
 rsource "pci/Kconfig"

components/drivers/block/Kconfig

@@ -0,0 +1,7 @@
+menuconfig RT_USING_BLK
+    bool "Using Block device drivers"
+    default n
+
+if RT_USING_BLK
+    rsource "partitions/Kconfig"
+endif

components/drivers/block/SConscript

@@ -0,0 +1,23 @@
+from building import *
+
+group = []
+objs = []
+
+if not GetDepend(['RT_USING_BLK']):
+    Return('group')
+
+cwd = GetCurrentDir()
+list = os.listdir(cwd)
+CPPPATH = [cwd + '/../include']
+
+src = ['blk.c', 'blk_dev.c', 'blk_dfs.c', 'blk_partition.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+objs = objs + group
+
+Return('objs')