diff options
| author | Alexander Graf <agraf@suse.de> | 2016-05-11 18:25:48 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-05-27 15:39:48 -0400 |
| commit | 51735ae0ea2f5d67c0f7cc4d1f938f36955e1fe7 (patch) | |
| tree | 63a01e042c04913656eba26ca02e8f29693d0e07 /lib/efi_loader/Kconfig | |
| parent | 851bda81487b0e2b5b43c9c2dc2582214751953e (diff) | |
| download | talos-obmc-uboot-51735ae0ea2f5d67c0f7cc4d1f938f36955e1fe7.tar.gz talos-obmc-uboot-51735ae0ea2f5d67c0f7cc4d1f938f36955e1fe7.zip | |
efi_loader: Add bounce buffer support
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>
Diffstat (limited to 'lib/efi_loader/Kconfig')
| -rw-r--r-- | lib/efi_loader/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig index 14c99ec9cf..37a0dd60a5 100644 --- a/lib/efi_loader/Kconfig +++ b/lib/efi_loader/Kconfig @@ -7,3 +7,12 @@ config EFI_LOADER 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. |
