mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 11:18:28 +00:00
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>
18 lines
684 B
Text
18 lines
684 B
Text
config EFI_LOADER
|
||
bool "Support running EFI Applications in U-Boot"
|
||
depends on (ARM64 || ARM) && OF_LIBFDT
|
||
default y
|
||
help
|
||
Select this option if you want to run EFI applications (like grub2)
|
||
on top of U-Boot. If this option is enabled, U-Boot will expose EFI
|
||
interfaces to a loaded EFI application, enabling it to reuse U-Boot's
|
||
device drivers.
|
||
|
||
config EFI_LOADER_BOUNCE_BUFFER
|
||
bool "EFI Applications use bounce buffers for DMA operations"
|
||
depends on EFI_LOADER && ARM64
|
||
default n
|
||
help
|
||
Some hardware does not support DMA to full 64bit addresses. For this
|
||
hardware we can create a bounce buffer so that payloads don't have to
|
||
worry about platform details.
|