1867a6ac8SSimon Glassconfig EFI 2867a6ac8SSimon Glass bool "Support running U-Boot from EFI" 3867a6ac8SSimon Glass depends on X86 4867a6ac8SSimon Glass help 5867a6ac8SSimon Glass U-Boot can be started from EFI on certain platforms. This allows 6867a6ac8SSimon Glass EFI to perform most of the system init and then jump to U-Boot for 7867a6ac8SSimon Glass final system boot. Another option is to run U-Boot as an EFI 8867a6ac8SSimon Glass application, with U-Boot using EFI's drivers instead of its own. 9867a6ac8SSimon Glass 10867a6ac8SSimon Glasschoice 11867a6ac8SSimon Glass prompt "Select EFI mode to use" 12867a6ac8SSimon Glass depends on X86 && EFI 13867a6ac8SSimon Glass 14867a6ac8SSimon Glassconfig EFI_APP 15867a6ac8SSimon Glass bool "Support running as an EFI application" 16867a6ac8SSimon Glass help 17867a6ac8SSimon Glass Build U-Boot as an application which can be started from EFI. This 18867a6ac8SSimon Glass is useful for examining a platform in the early stages of porting 19867a6ac8SSimon Glass U-Boot to it. It allows only very basic functionality, such as a 20867a6ac8SSimon Glass command prompt and memory and I/O functions. Use 'reset' to return 21867a6ac8SSimon Glass to EFI. 22867a6ac8SSimon Glass 23*476476e7SSimon Glassconfig EFI_STUB 24*476476e7SSimon Glass bool "Support running as an EFI payload" 25*476476e7SSimon Glass 26*476476e7SSimon Glassendchoice 27*476476e7SSimon Glass 28867a6ac8SSimon Glassconfig EFI_RAM_SIZE 29867a6ac8SSimon Glass hex "Amount of EFI RAM for U-Boot" 30867a6ac8SSimon Glass depends on EFI_APP 31867a6ac8SSimon Glass default 0x2000000 32867a6ac8SSimon Glass help 33867a6ac8SSimon Glass Set the amount of EFI RAM which is claimed by U-Boot for its own 34867a6ac8SSimon Glass use. U-Boot allocates this from EFI on start-up (along with a few 35867a6ac8SSimon Glass other smaller amounts) and it can never be increased after that. 36867a6ac8SSimon Glass It is used as the RAM size in with U-Boot. 37867a6ac8SSimon Glass 38*476476e7SSimon Glasschoice 39*476476e7SSimon Glass prompt "EFI 32/64-bit selection" 40*476476e7SSimon Glass depends on EFI_STUB 41*476476e7SSimon Glass help 42*476476e7SSimon Glass EFI does not support mixing 32-bit and 64-bit modes. This is a 43*476476e7SSimon Glass significant problem because it means that you must build a stub with 44*476476e7SSimon Glass the correct type for EFI to load it correctly. If you are using 45*476476e7SSimon Glass 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do 46*476476e7SSimon Glass this may produce no error message - it just won't start! 47*476476e7SSimon Glass 48*476476e7SSimon Glassconfig EFI_STUB_32BIT 49*476476e7SSimon Glass bool "Produce a stub for running with 32-bit EFI" 50*476476e7SSimon Glass 51*476476e7SSimon Glassconfig EFI_STUB_64BIT 52*476476e7SSimon Glass bool "Produce a stub for running with 64-bit EFI" 53*476476e7SSimon Glass 54867a6ac8SSimon Glassendchoice 55