1config EFI 2 bool "Support running U-Boot from EFI" 3 depends on X86 4 help 5 U-Boot can be started from EFI on certain platforms. This allows 6 EFI to perform most of the system init and then jump to U-Boot for 7 final system boot. Another option is to run U-Boot as an EFI 8 application, with U-Boot using EFI's drivers instead of its own. 9 10choice 11 prompt "Select EFI mode to use" 12 depends on X86 && EFI 13 14config EFI_APP 15 bool "Support running as an EFI application" 16 help 17 Build U-Boot as an application which can be started from EFI. This 18 is useful for examining a platform in the early stages of porting 19 U-Boot to it. It allows only very basic functionality, such as a 20 command prompt and memory and I/O functions. Use 'reset' to return 21 to EFI. 22 23config EFI_RAM_SIZE 24 hex "Amount of EFI RAM for U-Boot" 25 depends on EFI_APP 26 default 0x2000000 27 help 28 Set the amount of EFI RAM which is claimed by U-Boot for its own 29 use. U-Boot allocates this from EFI on start-up (along with a few 30 other smaller amounts) and it can never be increased after that. 31 It is used as the RAM size in with U-Boot. 32 33endchoice 34