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https://github.com/brain-hackers/u-boot-brain
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51735ae0ea
Some hardware that is supported by U-Boot can not handle DMA above 32bits. For these systems, we need to come up with a way to expose the disk interface in a safe way. This patch implements EFI specific bounce buffers. For non-EFI cases, this apparently was no issue so far, since we can just define our environment variables conveniently. Signed-off-by: Alexander Graf <agraf@suse.de>
19 lines
684 B
Plaintext
19 lines
684 B
Plaintext
config EFI_LOADER
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bool "Support running EFI Applications in U-Boot"
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depends on (ARM64 || ARM) && OF_LIBFDT
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default y
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help
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Select this option if you want to run EFI applications (like grub2)
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on top of U-Boot. If this option is enabled, U-Boot will expose EFI
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interfaces to a loaded EFI application, enabling it to reuse U-Boot's
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device drivers.
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config EFI_LOADER_BOUNCE_BUFFER
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bool "EFI Applications use bounce buffers for DMA operations"
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depends on EFI_LOADER && ARM64
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default n
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help
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Some hardware does not support DMA to full 64bit addresses. For this
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hardware we can create a bounce buffer so that payloads don't have to
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worry about platform details.
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