1*4882a593Smuzhiyunconfig EFI 2*4882a593Smuzhiyun bool "Support running U-Boot from EFI" 3*4882a593Smuzhiyun depends on X86 4*4882a593Smuzhiyun help 5*4882a593Smuzhiyun U-Boot can be started from EFI on certain platforms. This allows 6*4882a593Smuzhiyun EFI to perform most of the system init and then jump to U-Boot for 7*4882a593Smuzhiyun final system boot. Another option is to run U-Boot as an EFI 8*4882a593Smuzhiyun application, with U-Boot using EFI's drivers instead of its own. 9*4882a593Smuzhiyun 10*4882a593Smuzhiyunchoice 11*4882a593Smuzhiyun prompt "Select EFI mode to use" 12*4882a593Smuzhiyun depends on X86 && EFI 13*4882a593Smuzhiyun 14*4882a593Smuzhiyunconfig EFI_APP 15*4882a593Smuzhiyun bool "Support running as an EFI application" 16*4882a593Smuzhiyun help 17*4882a593Smuzhiyun Build U-Boot as an application which can be started from EFI. This 18*4882a593Smuzhiyun is useful for examining a platform in the early stages of porting 19*4882a593Smuzhiyun U-Boot to it. It allows only very basic functionality, such as a 20*4882a593Smuzhiyun command prompt and memory and I/O functions. Use 'reset' to return 21*4882a593Smuzhiyun to EFI. 22*4882a593Smuzhiyun 23*4882a593Smuzhiyunconfig EFI_STUB 24*4882a593Smuzhiyun bool "Support running as an EFI payload" 25*4882a593Smuzhiyun 26*4882a593Smuzhiyunendchoice 27*4882a593Smuzhiyun 28*4882a593Smuzhiyunconfig EFI_RAM_SIZE 29*4882a593Smuzhiyun hex "Amount of EFI RAM for U-Boot" 30*4882a593Smuzhiyun depends on EFI_APP 31*4882a593Smuzhiyun default 0x2000000 32*4882a593Smuzhiyun help 33*4882a593Smuzhiyun Set the amount of EFI RAM which is claimed by U-Boot for its own 34*4882a593Smuzhiyun use. U-Boot allocates this from EFI on start-up (along with a few 35*4882a593Smuzhiyun other smaller amounts) and it can never be increased after that. 36*4882a593Smuzhiyun It is used as the RAM size in with U-Boot. 37*4882a593Smuzhiyun 38*4882a593Smuzhiyunchoice 39*4882a593Smuzhiyun prompt "EFI 32/64-bit selection" 40*4882a593Smuzhiyun depends on EFI_STUB 41*4882a593Smuzhiyun help 42*4882a593Smuzhiyun EFI does not support mixing 32-bit and 64-bit modes. This is a 43*4882a593Smuzhiyun significant problem because it means that you must build a stub with 44*4882a593Smuzhiyun the correct type for EFI to load it correctly. If you are using 45*4882a593Smuzhiyun 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do 46*4882a593Smuzhiyun this may produce no error message - it just won't start! 47*4882a593Smuzhiyun 48*4882a593Smuzhiyunconfig EFI_STUB_32BIT 49*4882a593Smuzhiyun bool "Produce a stub for running with 32-bit EFI" 50*4882a593Smuzhiyun 51*4882a593Smuzhiyunconfig EFI_STUB_64BIT 52*4882a593Smuzhiyun bool "Produce a stub for running with 64-bit EFI" 53*4882a593Smuzhiyun 54*4882a593Smuzhiyunendchoice 55