blob: b23ba5b50412f9df907fdf9826e4bdef24696de3 [file] [log] [blame]
Simon Glass9539e692015-07-31 09:31:36 -06001config 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