boards/frdm-k64f add riotboot support

boards/frdm-k64f/Makefile.features

@@ -8,6 +8,9 @@ FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
 FEATURES_PROVIDED += periph_uart
 
+# Put other features for this board (in alphabetical order)
+FEATURES_PROVIDED += riotboot
+
 # The board MPU family (used for grouping by the CI system)
 FEATURES_MCU_GROUP = cortex_m4_1
 

cpu/kinetis/Makefile.include

@@ -6,12 +6,19 @@ endif
 
 # "The Vector table must be naturally aligned to a power of two whose alignment
 # value is greater than or equal to number of Exceptions supported x 4"
-# CPU_IRQ_NUMOF for KWxD boards is < 81+16 so (81*4 bytes = 388 bytes ~= 0x200)
+# CPU_IRQ_NUMOF for KWxD and KxF boards is < 102+16 so (81*4 bytes = 472 bytes ~= 0x200)
 # RIOTBOOT_HDR_LEN can be set to 0x200
-ifeq (DW, $(KINETIS_CORE)$(KINETIS_SERIES))
+ifneq (,$(filter FK DW,$(KINETIS_CORE)$(KINETIS_SERIES)))
   RIOTBOOT_HDR_LEN ?= 0x200
 endif
 
+# Slot size is determined by "((total_flash_size - RIOTBOOT_LEN) / 2)".
+# If RIOTBOOT_LEN uses an uneven number of flashpages, the remainder of the
+# flash cannot be divided by two slots while staying FLASHPAGE_SIZE aligned.
+ifeq (K, $(KINETIS_SERIES))
+  RIOTBOOT_LEN ?= 0x2000
+endif
+
 # Add search path for linker scripts
 LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ldscripts