makefile: Add EF (Entire Flash) targets for all boards

These new build targets will construct a flash image that
includes both a bootloader as well as a firmware image all
in one.  Examples:
  make ef_coptercontrol
  make ef_revolution

This also adds support for a new target for writing this EF
image to boards that support a DFU interface (only F4-based
boards).  This can be done by running:
  make dfuutil_install
  # Boot board with SBL asserted to activate STM32 DFU ROM
  # Attach USB cable
  make ef_revolution_dfu

Bootloader images are also now padded out to occupy the full
BL flash region.

Makefile

@@ -490,17 +490,42 @@ bu_$(1)_clean:
 	$(V1) $(RM) -fr $(BUILD_DIR)/bu_$(1)
 endef
 
+# $(1) = Canonical board name all in lower case (e.g. coptercontrol)
+define EF_TEMPLATE
+.PHONY: ef_$(1)
+EF_$(1)_IMAGE_NAME := $(BUILD_DIR)/ef_$(1)/ef_$(1).bin
+ef_$(1): $(BUILD_DIR)/ef_$(1)/ef_$(1).bin
+
+
+$$(EF_$(1)_IMAGE_NAME): bl_$(1)_bin fw_$(1)_bin
+	$(V0) @echo " FLASH IMG  $$@"
+	$(V1) mkdir -p $(BUILD_DIR)/ef_$(1)
+	$(V1) cat $(BUILD_DIR)/bl_$(1)/bl_$(1).bin $(BUILD_DIR)/fw_$(1)/fw_$(1).bin > $$(EF_$(1)_IMAGE_NAME)
+
+.PHONY: ef_$(1)_dfu
+ef_$(1)_dfu: $$(EF_$(1)_IMAGE_NAME)
+	$(V0) @echo " DFU RESCUE $$@"
+	$(V1) sudo $(DFUUTIL_DIR)/bin/dfu-util -l && sudo $(DFUUTIL_DIR)/bin/dfu-util -d 0483:df11 -c 1 -i 0 -a 0 -D $$< -s 0x08000000
+
+.PHONY: ef_$(1)_clean
+ef_$(1)_clean:
+	$(V0) @echo " CLEAN      $$@"
+	$(V1) $(RM) -fr $(BUILD_DIR)/ef_$(1)
+endef
+
 # $(1) = Canonical board name all in lower case (e.g. coptercontrol)
 define BOARD_PHONY_TEMPLATE
 .PHONY: all_$(1)
 all_$(1): $$(filter fw_$(1), $$(FW_TARGETS))
 all_$(1): $$(filter bl_$(1), $$(BL_TARGETS))
 all_$(1): $$(filter bu_$(1), $$(BU_TARGETS))
+all_$(1): $$(filter ef_$(1), $$(EF_TARGETS))
 
 .PHONY: all_$(1)_clean
 all_$(1)_clean: $$(addsuffix _clean, $$(filter fw_$(1), $$(FW_TARGETS)))
 all_$(1)_clean: $$(addsuffix _clean, $$(filter bl_$(1), $$(BL_TARGETS)))
 all_$(1)_clean: $$(addsuffix _clean, $$(filter bu_$(1), $$(BU_TARGETS)))
+all_$(1)_clean: $$(addsuffix _clean, $$(filter ef_$(1), $$(EF_TARGETS)))
 endef
 
 ALL_BOARDS := coptercontrol pipxtreme revolution
@@ -514,6 +539,7 @@ revolution_friendly    := Revolution
 FW_BOARDS  := $(ALL_BOARDS)
 BL_BOARDS  := $(ALL_BOARDS)
 BU_BOARDS  := $(ALL_BOARDS)
+EF_BOARDS  := $(ALL_BOARDS)
 
 # FIXME: The INS build doesn't have a bootloader or bootloader
 #        updater yet so we need to filter them out to prevent errors.
@@ -524,6 +550,7 @@ BU_BOARDS  := $(filter-out ins, $(ALL_BOARDS))
 FW_TARGETS := $(addprefix fw_, $(FW_BOARDS))
 BL_TARGETS := $(addprefix bl_, $(BL_BOARDS))
 BU_TARGETS := $(addprefix bu_, $(BU_BOARDS))
+EF_TARGETS := $(addprefix ef_, $(EF_BOARDS))
 
 .PHONY: all_fw all_fw_clean
 all_fw:        $(addsuffix _opfw,  $(FW_TARGETS))
@@ -537,9 +564,13 @@ all_bl_clean:  $(addsuffix _clean, $(BL_TARGETS))
 all_bu:        $(addsuffix _opfw,  $(BU_TARGETS))
 all_bu_clean:  $(addsuffix _clean, $(BU_TARGETS))
 
+.PHONY: all_ef all_ef_clean
+all_ef:        $(EF_TARGETS))
+all_ef_clean:  $(addsuffix _clean, $(EF_TARGETS))
+
 .PHONY: all_flight all_flight_clean
-all_flight:       all_fw all_bl all_bu
+all_flight:       all_fw all_bl all_bu all_ef
-all_flight_clean: all_fw_clean all_bl_clean all_bu_clean
+all_flight_clean: all_fw_clean all_bl_clean all_bu_clean all_ef_clean
 
 # Expand the groups of targets for each board
 $(foreach board, $(ALL_BOARDS), $(eval $(call BOARD_PHONY_TEMPLATE,$(board))))
@@ -553,6 +584,9 @@ $(foreach board, $(ALL_BOARDS), $(eval $(call FW_TEMPLATE,$(board),$($(board)_fr
 # Expand the bootloader rules
 $(foreach board, $(ALL_BOARDS), $(eval $(call BL_TEMPLATE,$(board),$($(board)_friendly))))
 
+# Expand the entire-flash rules
+$(foreach board, $(ALL_BOARDS), $(eval $(call EF_TEMPLATE,$(board),$($(board)_friendly))))
+
 .PHONY: sim_posix
 sim_posix: sim_posix_elf
 

flight/PiOS/STM32F10x/link_STM32103CB_CC_Rev1_BL_sections.ld

@@ -75,6 +75,7 @@ SECTIONS
     {
 	. = ALIGN(4);
 	KEEP(*(.boardinfo))
+	. = ALIGN(ORIGIN(BD_INFO)+LENGTH(BD_INFO));
     } > BD_INFO
 
     /* Stabs debugging sections.  */

flight/PiOS/STM32F4xx/link_STM32F4xx_sections.ld

@@ -68,6 +68,7 @@ SECTIONS
     {
 		. = ALIGN(4);
 		KEEP(*(.boardinfo))
+		. = ALIGN(ORIGIN(BD_INFO)+LENGTH(BD_INFO));
 	} > BD_INFO
 
     /*