efi: Add start-up library code

[karo-tx-uboot.git] / lib / efi / Kconfig

diff --git a/lib/efi/Kconfig b/lib/efi/Kconfig
new file mode 100644 (file)
index 0000000..b23ba5b
--- /dev/null
+++ b/lib/efi/Kconfig
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+config EFI
+       bool "Support running U-Boot from EFI"
+       depends on X86
+       help
+         U-Boot can be started from EFI on certain platforms. This allows
+         EFI to perform most of the system init and then jump to U-Boot for
+         final system boot. Another option is to run U-Boot as an EFI
+         application, with U-Boot using EFI's drivers instead of its own.
+
+choice
+       prompt "Select EFI mode to use"
+       depends on X86 && EFI
+
+config EFI_APP
+       bool "Support running as an EFI application"
+       help
+         Build U-Boot as an application which can be started from EFI. This
+         is useful for examining a platform in the early stages of porting
+         U-Boot to it. It allows only very basic functionality, such as a
+         command prompt and memory and I/O functions. Use 'reset' to return
+         to EFI.
+
+config EFI_RAM_SIZE
+       hex "Amount of EFI RAM for U-Boot"
+       depends on EFI_APP
+       default 0x2000000
+       help
+         Set the amount of EFI RAM which is claimed by U-Boot for its own
+         use. U-Boot allocates this from EFI on start-up (along with a few
+         other smaller amounts) and it can never be increased after that.
+         It is used as the RAM size in with U-Boot.
+
+endchoice