2 bool "Support running U-Boot from EFI"
4 imply X86_TSC_READ_BASE
6 U-Boot can be started from EFI on certain platforms. This allows
7 EFI to perform most of the system init and then jump to U-Boot for
8 final system boot. Another option is to run U-Boot as an EFI
9 application, with U-Boot using EFI's drivers instead of its own.
12 prompt "Select EFI mode to use"
16 bool "Support running as an EFI application"
19 Build U-Boot as an application which can be started from EFI. This
20 is useful for examining a platform in the early stages of porting
21 U-Boot to it. It allows only very basic functionality, such as a
22 command prompt and memory and I/O functions. Use 'reset' to return
26 bool "Support running as an EFI payload"
31 prompt "EFI app 32/64-bit selection"
34 EFI does not support mixing 32-bit and 64-bit modes. This is a
35 significant problem because it means that you must build a stub with
36 the correct type for EFI to load it correctly. If you are using
37 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
38 this may produce no error message - it just won't start!
41 bool "Produce an app for running with 32-bit EFI"
44 bool "Produce an app for running with 64-bit EFI"
49 prompt "EFI stub 32/64-bit selection"
52 EFI does not support mixing 32-bit and 64-bit modes. This is a
53 significant problem because it means that you must build a stub with
54 the correct type for EFI to load it correctly. If you are using
55 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
56 this may produce no error message - it just won't start!
59 bool "Produce a stub for running with 32-bit EFI"
62 bool "Produce a stub for running with 64-bit EFI"
67 hex "Amount of EFI RAM for U-Boot"
71 Set the amount of EFI RAM which is claimed by U-Boot for its own
72 use. U-Boot allocates this from EFI on start-up (along with a few
73 other smaller amounts) and it can never be increased after that.
74 It is used as the RAM size in with U-Boot.