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"
18 Build U-Boot as an application which can be started from EFI. This
19 is useful for examining a platform in the early stages of porting
20 U-Boot to it. It allows only very basic functionality, such as a
21 command prompt and memory and I/O functions. Use 'reset' to return
25 bool "Support running as an EFI payload"
30 prompt "EFI app 32/64-bit selection"
33 EFI does not support mixing 32-bit and 64-bit modes. This is a
34 significant problem because it means that you must build a stub with
35 the correct type for EFI to load it correctly. If you are using
36 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
37 this may produce no error message - it just won't start!
40 bool "Produce an app for running with 32-bit EFI"
43 bool "Produce an app for running with 64-bit EFI"
48 prompt "EFI stub 32/64-bit selection"
51 EFI does not support mixing 32-bit and 64-bit modes. This is a
52 significant problem because it means that you must build a stub with
53 the correct type for EFI to load it correctly. If you are using
54 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
55 this may produce no error message - it just won't start!
58 bool "Produce a stub for running with 32-bit EFI"
61 bool "Produce a stub for running with 64-bit EFI"
66 hex "Amount of EFI RAM for U-Boot"
70 Set the amount of EFI RAM which is claimed by U-Boot for its own
71 use. U-Boot allocates this from EFI on start-up (along with a few
72 other smaller amounts) and it can never be increased after that.
73 It is used as the RAM size in with U-Boot.