Kbuild: Additional Kconfig symbols.

This commit adds the following Kconfig symbols:
 - INIT_STACKS
 - UART_INTERRUPT_DRIVEN
 - CONSOLE_HANDLER
 - BUILD_TIMESTAMP
 - TICKLESS_KERNEL
 - CONTEXT_CUSTOM_DATA

Change-Id: Id96a7e759c8beac73f27193df07b5c7562379b2f
Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@linux.intel.com>

Kconfig

@@ -111,6 +111,14 @@ config  SECTION_GARBAGE_COLLECTION
 	Enabling this option may cause these host tools to end abnormally
 	if the expected symbols have been discarded.
 
+config BUILD_TIMESTAMP
+	bool
+	prompt "Build timestamp"
+	default n
+	help
+	This option embeds a string into the project image that indicates
+	the date and time the image was created.
+
 endmenu
 
 source "drivers/Kconfig"

drivers/Kconfig

@@ -4,6 +4,10 @@ config DRV_CONSOLE
 	help
 	This option enables the UART console driver.
 
+if DRV_CONSOLE
+source "drivers/console/Kconfig"
+endif
+
 config DRV_SERIAL
 	bool
 	default n

drivers/console/Kconfig

@@ -0,0 +1,16 @@
+config UART_INTERRUPT_DRIVEN
+	bool
+	prompt "Interrupt driven UART support"
+	default n
+	help
+	This option enables interrupt support for UART allowing console
+	input and UART based drivers.
+
+config CONSOLE_HANDLER
+	bool
+	prompt "Enable console input handler"
+	select UART_INTERRUPT_DRIVEN
+	default n
+	help
+	This option enables console input handler allowing to write simple
+	interaction between serial console and the OS.

drivers/serial/Kconfig

@@ -21,3 +21,11 @@ config DRV_STELLARIS_UART
 	This option enables the Stellaris serial driver.
 	This specific driver can be used for the serial hardware
 	available at the Texas Instrument LM3S6965 BSP.
+
+config  UART_INTERRUPT_DRIVEN
+	bool
+	prompt "Interrupt driven UART support"
+	default n
+	help
+	This option enables interrupt support for UART allowing console
+	input and UART based drivers.

kernel/Kconfig

@@ -27,6 +27,25 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 	Frequency of the hardware timer used for the system clock
 	(in Hz).
 
+config  TICKLESS_KERNEL
+	bool
+	# omit prompt to signify a "hidden" option
+	default y if (SYS_CLOCK_TICKS_PER_SEC = 0)
+	default n
+	help
+	This option specifies that the kernel lacks timer support.
+
+config  INIT_STACKS
+	bool
+	prompt "Initialize stack areas"
+	default n
+	help
+	This option instructs the kernel to initialize stack areas with a
+	known value (0xaa) before they are first used, so that the high
+	water mark can be easily determined. This applies to the stack areas
+	for both tasks and fibers, as well as for the K_swapper's command
+	stack.
+
 config  XIP
 	bool
 	prompt "Execute in place"

kernel/microkernel/core/Kconfig

@@ -66,7 +66,8 @@ config NUM_COMMAND_PACKETS
 
 config NUM_TIMER_PACKETS
 	int
-	prompt "Number of timer packets"
+	prompt "Number of timer packets" if !TICKLESS_KERNEL
+	default 0 if TICKLESS_KERNEL
 	default 10
 	depends on MICROKERNEL
 	help

kernel/microkernel/timer/Kconfig

@@ -5,7 +5,7 @@ config TIMESLICING
 	bool
 	prompt "Task time slicing"
 	default y
-	depends on MICROKERNEL
+	depends on MICROKERNEL && !TICKLESS_KERNEL
 	help
 	This option enables time slicing between tasks of equal priority.
 

kernel/nanokernel/core/Kconfig

@@ -35,3 +35,11 @@ config ISR_STACK_SIZE
 	help
 	This option specifies the size of the stack used by interrupt
 	service routines (ISRs), and during nanokernel initialization.
+
+config  CONTEXT_CUSTOM_DATA
+	bool
+	prompt "Task and fiber custom data"
+	default n
+	help
+	This option allows each task and fiber to store 32 bits of custom data,
+	which can be accessed using the context_custom_data_xxx() APIs.