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When running as an EFI application, U-Boot must request memory from EFI, and provide access to the boot services U-Boot needs. Add library code to perform these tasks. This includes efi_main() which is the entry point from EFI. U-Boot is built as a shared library. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
config EFI
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bool "Support running U-Boot from EFI"
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depends on X86
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help
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U-Boot can be started from EFI on certain platforms. This allows
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EFI to perform most of the system init and then jump to U-Boot for
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final system boot. Another option is to run U-Boot as an EFI
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application, with U-Boot using EFI's drivers instead of its own.
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choice
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prompt "Select EFI mode to use"
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depends on X86 && EFI
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config EFI_APP
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bool "Support running as an EFI application"
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help
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Build U-Boot as an application which can be started from EFI. This
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is useful for examining a platform in the early stages of porting
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U-Boot to it. It allows only very basic functionality, such as a
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command prompt and memory and I/O functions. Use 'reset' to return
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to EFI.
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config EFI_RAM_SIZE
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hex "Amount of EFI RAM for U-Boot"
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depends on EFI_APP
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default 0x2000000
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help
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Set the amount of EFI RAM which is claimed by U-Boot for its own
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use. U-Boot allocates this from EFI on start-up (along with a few
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other smaller amounts) and it can never be increased after that.
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It is used as the RAM size in with U-Boot.
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endchoice
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