init: Add protection against incorrect levels or priorities

Initialization level can be one of five predefined.
Init priority is numeric from 1 to 99. If init level or priority
is defined wrong, linker prints out the message and stops.

Change-Id: I165a32ffb668cda983fd48eb2aa7b94998e31a18
Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com>

arch/arc/platforms/generic_arc/generic_arc.cmd

@@ -136,6 +136,11 @@ SECTIONS {
 		DEVICE_INIT_SECTIONS()
 	} GROUP_LINK_IN(RAMABLE_REGION)
 
+	SECTION_PROLOGUE(initlevel_error, (OPTIONAL),)
+	{
+		DEVICE_INIT_UNDEFINED_SECTION()
+	}
+	ASSERT(SIZEOF(initlevel_error) == 0, "Undefined initialization levels used.")
 
 	__data_ram_end = .;
 

include/arch/arm/cortex_m/scripts/linker.cmd

@@ -156,6 +156,12 @@ SECTIONS
 		DEVICE_INIT_SECTIONS()
 	} GROUP_LINK_IN(RAMABLE_REGION)
 
+	SECTION_PROLOGUE(initlevel_error, (OPTIONAL),)
+	{
+		DEVICE_INIT_UNDEFINED_SECTION()
+	}
+	ASSERT(SIZEOF(initlevel_error) == 0, "Undefined initialization levels used.")
+
 	SECTION_PROLOGUE (_k_task_list, (OPTIONAL),)
 	{
 		_k_task_list_start = .;

include/arch/x86/linker-common-sections.h

@@ -128,6 +128,12 @@ SECTIONS
 		KEXEC_PGALIGN_PAD(MMU_PAGE_SIZE)
 	} GROUP_LINK_IN(RAM)
 
+	SECTION_PROLOGUE(initlevel_error, (OPTIONAL),)
+	{
+		DEVICE_INIT_UNDEFINED_SECTION()
+	}
+	ASSERT(SIZEOF(initlevel_error) == 0, "Undefined initialization levels used.")
+
 	SECTION_PROLOGUE(_k_task_list, ALIGN(4), ALIGN(4))
 	{
 		_k_task_list_start = .;

include/linker-defs.h

@@ -71,6 +71,11 @@
 		DEVICE_INIT_LEVEL(APPLICATION)	\
 		__device_init_end = .;			\
 
+
+/* define a section for undefined device initialization levels */
+#define DEVICE_INIT_UNDEFINED_SECTION()		\
+		KEEP(*(SORT(.init_[_A-Z0-9]*)))	\
+
 #ifdef CONFIG_X86 /* LINKER FILES: defines used by linker script */
 /* Should be moved to linker-common-defs.h */
 #if defined(CONFIG_XIP)