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@startuml
participant arm_io_storage
participant io_storage
-> arm_io_storage : plat_get_image_source(image_id, &dev_handle, &image_spec)
group init and check device (image_id)
alt image_id = BL2_IMAGE_ID
note over arm_io_storage
get BL2_IMAGE_ID policy:
- fip_dev_handle
- open_fip()
end note
opt policy->check()
arm_io_storage -> arm_io_storage : open_fip(spec)
activate arm_io_storage
arm_io_storage -> io_storage : io_dev_init(fip_dev_handle, FIP_IMAGE_ID)
ref over io_storage : dev_init() on fip device
arm_io_storage -> io_storage : io_open(fip_dev_handle, spec, &local_image_handle)
ref over io_storage : io_open() on fip device
arm_io_storage -> io_storage : io_close(local_image_handle)
ref over io_storage : io_close() on fip device
hnote over arm_io_storage
fip_dev_handle ready
end note
end opt
deactivate arm_io_storage
else image_id = FIP_IMAGE_ID
activate arm_io_storage
note over arm_io_storage
get FIP_IMAGE_ID policy:
- memmap_dev_handle
- open_memmap()
end note
opt policy->check()
arm_io_storage -> arm_io_storage : open_memmap(spec)
activate arm_io_storage
arm_io_storage -> io_storage : io_dev_init(memmap_dev_handle, NULL)
ref over io_storage : dev_init() on memmap device
arm_io_storage -> io_storage : io_open(memmap_dev_handle, spec, &local_image_handle)
ref over io_storage : io_open() on memmap device
arm_io_storage -> io_storage : io_close(local_image_handle)
ref over io_storage : io_close() on memmap device
hnote over arm_io_storage
memmap_dev_handle ready
end note
deactivate arm_io_storage
end opt
deactivate arm_io_storage
end alt
end group
@enduml
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