xref: /openbmc/u-boot/lib/efi/Kconfig (revision 867a6ac8)
1config 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
34