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diff --git a/docs/resources/diagrams/Makefile b/docs/resources/diagrams/Makefile
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+#
+# Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#
+# This Makefile generates the image files used in the Trusted Firmware-A
+# document from the dia file.
+#
+# The PNG files in the present directory have been generated using Dia version
+# 0.97.2, which can be obtained from https://wiki.gnome.org/Apps/Dia/Download
+#
+
+# generate_image use the tool dia generate png from dia file
+# $(1) = layers
+# $(2) = image file name
+# $(3) = image file format
+# $(4) = addition opts
+# $(5) = dia source file
+define generate_image
+ dia --show-layers=$(1) --filter=$(3) --export=$(2) $(4) $(5)
+endef
+
+RESET_DIA = reset_code_flow.dia
+RESET_PNGS = \
+ default_reset_code.png \
+ reset_code_no_cpu_check.png \
+ reset_code_no_boot_type_check.png \
+ reset_code_no_checks.png \
+
+# The $(RESET_DIA) file is organized in several layers.
+# Each image is generated by combining and exporting the appropriate set of
+# layers.
+default_reset_code_layers = "Frontground,Background,cpu_type_check,boot_type_check"
+reset_code_no_cpu_check_layers = "Frontground,Background,no_cpu_type_check,boot_type_check"
+reset_code_no_boot_type_check_layers= "Frontground,Background,cpu_type_check,no_boot_type_check"
+reset_code_no_checks_layers = "Frontground,Background,no_cpu_type_check,no_boot_type_check"
+
+default_reset_code_opts =
+reset_code_no_cpu_check_opts =
+reset_code_no_boot_type_check_opts =
+reset_code_no_checks_opts =
+
+INT_DIA = int_handling.dia
+INT_PNGS = \
+ sec-int-handling.png \
+ non-sec-int-handling.png
+
+# The $(INT_DIA) file is organized in several layers.
+# Each image is generated by combining and exporting the appropriate set of
+# layers.
+non-sec-int-handling_layers = "non_sec_int_bg,legend,non_sec_int_note,non_sec_int_handling"
+sec-int-handling_layers = "sec_int_bg,legend,sec_int_note,sec_int_handling"
+
+non-sec-int-handling_opts = --size=1692x
+sec-int-handling_opts = --size=1570x
+
+XLAT_DIA = xlat_align.dia
+XLAT_PNG = xlat_align.png
+
+xlat_align_layers = "bg,translations"
+xlat_align_opts =
+
+RMM_DIA = rmm_cold_boot_generic.dia
+RMM_PNG = rmm_cold_boot_generic.png
+
+rmm_cold_boot_generic_layers = "background"
+rmm_cold_boot_generic_opts =
+
+RMM_EL3_MANIFEST_DIA = rmm_el3_manifest_struct.dia
+RMM_EL3_MANIFEST_PNG = rmm_el3_manifest_struct.png
+
+rmm_el3_manifest_struct_layers = "Background"
+rmm_el3_manifest_struct_opts =
+
+PSA_FWU_DIA = PSA-FWU.dia
+PSA_FWU_PNG = PSA-FWU.png
+
+FWU-update_struct_layers = "background"
+FWU-update_struct_opts =
+
+MB_DESIGN_DIA = measured_boot_design.dia
+MB_DESIGN_PNG = measured_boot_design.png
+
+measured_boot_design_layers = "background"
+measured_boot_design_opts =
+
+all:$(RESET_PNGS) $(INT_PNGS) $(XLAT_PNG) $(RMM_PNG) $(RMM_EL3_MANIFEST_PNG) $(PSA_FWU_PNG) $(MB_DESIGN_PNG)
+
+$(RESET_PNGS):$(RESET_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)
+
+$(INT_PNGS):$(INT_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)
+
+$(XLAT_PNG):$(XLAT_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$(patsubst %.png,%.svg,$@),svg,$($(patsubst %.png,%_opts,$@)),$<)
+ inkscape -z $(patsubst %.png,%.svg,$@) -e $@ -d 45
+
+$(RMM_PNG):$(RMM_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)
+
+$(RMM_EL3_MANIFEST_PNG):$(RMM_EL3_MANIFEST_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)
+
+$(PSA_FWU_PNG):$(PSA_FWU_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)
+
+$(MB_DESIGN_PNG):$(MB_DESIGN_DIA)
+ $(call generate_image,$($(patsubst %.png,%_layers,$@)),$@,png,$($(patsubst %.png,%_opts,$@)),$<)