kernel: remove nano/micro wording and usage

Also remove some old cflags referencing directories that do not exist
anymore.
Also replace references to legacy APIs in doxygen documentation of
various functions.

Change-Id: I8fce3d1fe0f4defc44e6eb0ae09a4863e33a39db
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

arch/arm/core/cpu_idle.S

@@ -68,7 +68,7 @@ SECTION_FUNC(TEXT, _CpuIdleInit)
  *
  * @brief Get the kernel idle setting
  *
- * Returns the nanokernel idle setting, in ticks. Only called by __systick().
+ * Returns the kernel idle setting, in ticks. Only called by __systick().
  *
  * @return the requested number of ticks for the kernel to be idle
  *
@@ -86,7 +86,7 @@ SECTION_FUNC(TEXT, _NanoIdleValGet)
  *
  * @brief Clear the kernel idle setting
  *
- * Sets the nanokernel idle setting to 0. Only called by __systick().
+ * Sets the kernel idle setting to 0. Only called by __systick().
  *
  * @return N/A
  *
@@ -107,8 +107,8 @@ SECTION_FUNC(TEXT, _NanoIdleValClear)
  *
  * @brief Power save idle routine for ARM Cortex-M
  *
- * This function will be called by the nanokernel idle loop or possibly within
- * an implementation of _sys_power_save_idle in the microkernel when the
+ * This function will be called by the ernel idle loop or possibly within
+ * an implementation of _sys_power_save_idle in the kernel when the
  * '_sys_power_save_flag' variable is non-zero.  The ARM 'wfi' instruction
  * will be issued, causing a low-power consumption sleep mode.
  *
@@ -143,16 +143,12 @@ SECTION_FUNC(TEXT, k_cpu_idle)
  *
  * @brief Atomically re-enable interrupts and enter low power mode
  *
- * This function is utilized by the nanokernel object "wait" APIs for tasks,
- * e.g. nano_task_lifo_get(), nano_task_sem_take(),
- * nano_task_stack_pop(), and nano_task_fifo_get().
- *
  * INTERNAL
  * The requirements for k_cpu_atomic_idle() are as follows:
  * 1) The enablement of interrupts and entering a low-power mode needs to be
  *    atomic, i.e. there should be no period of time where interrupts are
  *    enabled before the processor enters a low-power mode.  See the comments
- *    in nano_task_lifo_get(), for example, of the race condition that occurs
+ *    in k_lifo_get(), for example, of the race condition that occurs
  *    if this requirement is not met.
  *
  * 2) After waking up from the low-power mode, the interrupt lockout state

arch/arm/core/fatal.c

@@ -16,7 +16,7 @@
 
 /**
  * @file
- * @brief Nanokernel fatal error handler for ARM Cortex-M
+ * @brief Kernel fatal error handler for ARM Cortex-M
  *
  * This module provides the _NanoFatalErrorHandler() routine for ARM Cortex-M.
  */
@@ -60,7 +60,7 @@ const NANO_ESF _default_esf = {
 
 /**
  *
- * @brief Nanokernel fatal error handler
+ * @brief Kernel fatal error handler
  *
  * This routine is called when fatal error conditions are detected by software
  * and is responsible only for reporting the error. Once reported, it then

arch/arm/core/irq_init.c

@@ -18,7 +18,7 @@
  * @file
  * @brief ARM Cortex-M interrupt initialization
  *
- * The ARM Cortex-M architecture provides its own fiber_abort() to deal with
+ * The ARM Cortex-M architecture provides its own k_thread_abort() to deal with
  * different CPU modes (handler vs thread) when a fiber aborts. When its entry
  * point returns or when it aborts itself, the CPU is in thread mode and must
  * call _Swap() (which triggers a service call), but when in handler mode, the

arch/arm/core/offsets/offsets.c

@@ -16,15 +16,14 @@
 
 /**
  * @file
- * @brief ARM nano kernel structure member offset definition file
+ * @brief ARM kernel structure member offset definition file
  *
  * This module is responsible for the generation of the absolute symbols whose
- * value represents the member offsets for various ARM nanokernel
- * structures.
+ * value represents the member offsets for various ARM kernel structures.
  *
  * All of the absolute symbols defined by this module will be present in the
- * final microkernel or nanokernel ELF image (due to the linker's reference to
- * the _OffsetAbsSyms symbol).
+ * final kernel ELF image (due to the linker's reference to the _OffsetAbsSyms
+ * symbol).
  *
  * INTERNAL
  * It is NOT necessary to define the offset for every member of a structure.

arch/arm/core/swap.S

@@ -243,7 +243,7 @@ _context_switch:
  *
  * @brief Initiate a cooperative context switch
  *
- * The _Swap() routine is invoked by various nanokernel services to effect
+ * The _Swap() routine is invoked by various kernel services to effect
  * a cooperative context context switch.  Prior to invoking _Swap(), the caller
  * disables interrupts via irq_lock() and the return 'key' is passed as a
  * parameter to _Swap().  The 'key' actually represents the BASEPRI register

arch/arm/core/thread.c

@@ -18,12 +18,10 @@
  * @file
  * @brief New thread creation for ARM Cortex-M
  *
- * Core nanokernel fiber related primitives for the ARM Cortex-M processor
- * architecture.
+ * Core thread related primitives for the ARM Cortex-M processor architecture.
  */
 
 #include <nanokernel.h>
-#include <arch/cpu.h>
 #include <toolchain.h>
 #include <kernel_structs.h>
 #include <wait_q.h>