fconf: Add documentation
Change-Id: I606f9491fb6deebc6845c5b9d7db88fc5c895bd9
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
diff --git a/docs/resources/diagrams/plantuml/fconf_bl2_populate.puml b/docs/resources/diagrams/plantuml/fconf_bl2_populate.puml
new file mode 100644
index 0000000..98a3ff1
--- /dev/null
+++ b/docs/resources/diagrams/plantuml/fconf_bl2_populate.puml
@@ -0,0 +1,41 @@
+@startuml
+
+box "BL2 common code"
+ participant bl2_entrypoint
+ participant bl2_main
+end box
+
+box "platform common code"
+ participant fconf
+ participant fconf_tbbr_getter
+end box
+
+box "arm platform code" #LightBlue
+ participant arm_bl2_setup
+ participant arm_io_storage
+ participant arm_fconf_io
+end box
+
+== bl2 setup ==
+bl2_entrypoint -> bl2_main : bl2_setup()
+bl2_main -> arm_bl2_setup : bl2_early_platform_setup2(\n\t arg0, arg1, arg2, arg3)
+note over arm_bl2_setup
+ arg0 = tb_fw_config
+ arg1 = mem_layout
+end note
+arm_bl2_setup -> arm_bl2_setup : arm_bl2_early_platform_setup(\n\t tb_fw_config, mem_layout)
+activate arm_bl2_setup
+ arm_bl2_setup -> fconf: fconf_polulate(tb_fw_config)
+ activate fconf
+ fconf -> fconf_tbbr_getter: fconf_populate_tbbr_dyn_config(uintptr_t dtb)
+ note over fconf_tbbr_getter: read tbbr propeties from dtb
+ fconf -> arm_fconf_io: fconf_populate_arm_io_policies(uintptr_t dtb)
+ note over arm_fconf_io: read arm io propeties from dtb
+ deactivate fconf
+ arm_bl2_setup -> arm_io_storage : plat_arm_io_setup()
+ note over arm_io_storage: use populated properties
+deactivate arm_bl2_setup
+
+== bl2 main ==
+
+@enduml