[tools] Add KConfig files.

src/Kconfig

@@ -0,0 +1,156 @@
+menu "Real-time Kernel"
+
+config RT_NAME_MAX
+    int "The maximal size of kernel object name"
+    range 2 32
+    default 8
+    help 
+        Each kernel object, such as thread, timer, semaphore etc, has a name, the RT_NAME_MAX is the maximal size of this object name.
+
+config RT_ALIGN_SIZE
+    int "Alignment size for CPU architecture data access"
+    default 4
+    help
+        Alignment size for CPU architecture data access
+
+config RT_THREAD_PRIORITY_MAX
+    int "The maximal level value of priority of thread"
+    range 8 256
+    default 32
+
+config RT_TICK_PER_SECOND
+    int "Tick frequency, Hz"
+    range 10 1000
+    default 100
+    help
+        System's tick frequency, Hz.
+
+config RT_DEBUG
+    bool "Enable debug features"
+    default y
+
+if RT_DEBUG
+
+config RT_USING_OVERFLOW_CHECK
+    bool "Using stack overflow checking"
+    default y
+    help
+        Enable thread stack overflow checking. The stack overflow is checking when each thread switch.
+
+config RT_DEBUG_INIT
+    bool "Enable system initialization informat print"
+    default n
+    help
+        print the procedure name of initialization
+
+config RT_DEBUG_THREAD
+    bool "Enable thread switch information dump"
+    default n
+    help
+        print the switch to/from thread name when each thread context switch
+
+endif
+
+config RT_USING_HOOK
+    bool "Enable system hook"
+    default y
+    help
+        Enable the hook function when system running, such as idle thread hook, thread context switch etc.
+
+config RT_USING_TIMER_SOFT
+    bool "Enable software timer with a timer thread"
+    default n
+    help
+        the timeout function context of soft-timer is under a high priority timer thread.
+
+if RT_USING_TIMER_SOFT
+config RT_TIMER_THREAD_PRIO
+    int "The priority level value of timer thread"
+    default 4
+
+config RT_TIMER_THREAD_STACK_SIZE
+    int "The stack size of timer thread"
+    default 512
+
+endif
+
+menu "Inter-Thread communication"
+
+config RT_USING_SEMAPHORE
+    bool "Enable semaphore"
+    default y
+
+config RT_USING_MUTEX
+    bool "Enable mutex"
+    default y
+
+config RT_USING_EVENT
+    bool "Enable event flag"
+    default y
+
+config RT_USING_MAILBOX
+    bool "Enable mailbox"
+    default y
+
+config RT_USING_MESSAGEQUEUE
+    bool "Enable message queue"
+    default y
+
+endmenu
+
+menu "Memory Management"
+
+    config RT_USING_MEMPOOL
+        bool "Using memory pool"
+        default y
+        help
+            Using static memory fixed partition
+
+    config RT_USING_MEMHEAP
+        bool "Using memory heap object"
+        default n
+        help
+            Using memory heap object to manage dynamic memory heap.
+
+    config RT_USING_HEAP
+        bool "Using dynamic memory management"
+        default y
+
+    if RT_USING_HEAP
+
+        choice USING_HEAP
+
+        config RT_USING_SMALL_MEM
+            bool "The memory management for small memory"
+
+        config RT_USING_SLAB
+            bool "Using SLAB memory management for large memory"
+        endchoice
+
+    endif
+
+endmenu
+
+menu "Kernel Device Object"
+
+    config RT_USING_DEVICE
+        bool "Using device object"
+        default y
+
+    config RT_USING_CONSOLE
+        bool "Using console for rt_kprintf"
+        default y
+
+    if RT_USING_CONSOLE
+        config RT_CONSOLEBUF_SIZE
+            int "the buffer size for console log printf"
+            default 128
+
+        config RT_CONSOLE_DEVICE_NAME
+            string "the device name for console"
+            default "uart"
+    endif
+
+endmenu
+
+endmenu