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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_STUB
- bool "Support running as an EFI payload"
- endchoice
- 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.
- choice
- prompt "EFI 32/64-bit selection"
- depends on EFI_STUB
- help
- EFI does not support mixing 32-bit and 64-bit modes. This is a
- significant problem because it means that you must build a stub with
- the correct type for EFI to load it correctly. If you are using
- 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
- this may produce no error message - it just won't start!
- config EFI_STUB_32BIT
- bool "Produce a stub for running with 32-bit EFI"
- config EFI_STUB_64BIT
- bool "Produce a stub for running with 64-bit EFI"
- endchoice
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