[DM/FEATURE] Support DMA management

components/drivers/Kconfig

@@ -23,6 +23,7 @@ rsource "hwcrypto/Kconfig"
 rsource "wlan/Kconfig"
 rsource "block/Kconfig"
 rsource "virtio/Kconfig"
+rsource "dma/Kconfig"
 rsource "mfd/Kconfig"
 rsource "ofw/Kconfig"
 rsource "pci/Kconfig"

components/drivers/dma/Kconfig

@@ -0,0 +1,10 @@
+menuconfig RT_USING_DMA
+    bool "Using Direct Memory Access (DMA)"
+    depends on RT_USING_DM
+    select RT_USING_ADT
+    select RT_USING_ADT_BITMAP
+    default n
+
+if RT_USING_DMA
+    osource "$(SOC_DM_DMA_DIR)/Kconfig"
+endif

components/drivers/dma/SConscript

@@ -0,0 +1,15 @@
+from building import *
+
+group = []
+
+if not GetDepend(['RT_USING_DMA']):
+    Return('group')
+
+cwd = GetCurrentDir()
+CPPPATH = [cwd + '/../include']
+
+src = ['dma.c', 'dma_pool.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')