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https://github.com/ARM-software/arm-trusted-firmware.git
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dbeace1027
Add uml sequence and class diagram to illustrate the behavior of the storage abstraction layer. Change-Id: I338262729f8034cc3d3eea1d0ce19cca973a91bb Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
62 lines
1.6 KiB
Text
62 lines
1.6 KiB
Text
@startuml
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participant arm_io_storage order 1
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participant io_storage order 2
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-> arm_io_storage : plat_get_image_source(image_id, &dev_handle, &image_spec)
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group init and check device (image_id)
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alt image_id = BL2_IMAGE_ID
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note over arm_io_storage
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get BL2_IMAGE_ID policy:
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- fip_dev_handle
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- open_fip()
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end note
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opt policy->check()
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arm_io_storage -> arm_io_storage : open_fip(spec)
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activate arm_io_storage
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arm_io_storage -> io_storage : io_dev_init(fip_dev_handle, FIP_IMAGE_ID)
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ref over io_storage : dev_init() on fip device
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arm_io_storage -> io_storage : io_open(fip_dev_handle, spec, &local_image_handle)
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ref over io_storage : io_open() on fip device
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arm_io_storage -> io_storage : io_close(local_image_handle)
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ref over io_storage : io_close() on fip device
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hnote over arm_io_storage
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fip_dev_handle ready
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end note
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end opt
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deactivate arm_io_storage
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else image_id = FIP_IMAGE_ID
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activate arm_io_storage
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note over arm_io_storage
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get FIP_IMAGE_ID policy:
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- memmap_dev_handle
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- open_memmap()
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end note
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opt policy->check()
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arm_io_storage -> arm_io_storage : open_memmap(spec)
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activate arm_io_storage
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arm_io_storage -> io_storage : io_dev_init(memmap_dev_handle, NULL)
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ref over io_storage : dev_init() on memmap device
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arm_io_storage -> io_storage : io_open(memmap_dev_handle, spec, &local_image_handle)
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ref over io_storage : io_open() on memmap device
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arm_io_storage -> io_storage : io_close(local_image_handle)
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ref over io_storage : io_close() on memmap device
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hnote over arm_io_storage
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memmap_dev_handle ready
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end note
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deactivate arm_io_storage
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end opt
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deactivate arm_io_storage
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end alt
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end group
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@enduml
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