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Simon Glass867a6ac2015-07-31 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
Simon Glass476476e2015-08-04 12:33:52 -060023config EFI_STUB
24 bool "Support running as an EFI payload"
25
26endchoice
27
Simon Glass867a6ac2015-07-31 09:31:36 -060028config EFI_RAM_SIZE
29 hex "Amount of EFI RAM for U-Boot"
30 depends on EFI_APP
31 default 0x2000000
32 help
33 Set the amount of EFI RAM which is claimed by U-Boot for its own
34 use. U-Boot allocates this from EFI on start-up (along with a few
35 other smaller amounts) and it can never be increased after that.
36 It is used as the RAM size in with U-Boot.
37
Simon Glass476476e2015-08-04 12:33:52 -060038choice
39 prompt "EFI 32/64-bit selection"
40 depends on EFI_STUB
41 help
42 EFI does not support mixing 32-bit and 64-bit modes. This is a
43 significant problem because it means that you must build a stub with
44 the correct type for EFI to load it correctly. If you are using
45 32-bit EFI, select 32-bit here, else select 64-bit. Failure to do
46 this may produce no error message - it just won't start!
47
48config EFI_STUB_32BIT
49 bool "Produce a stub for running with 32-bit EFI"
50
51config EFI_STUB_64BIT
52 bool "Produce a stub for running with 64-bit EFI"
53
Simon Glass867a6ac2015-07-31 09:31:36 -060054endchoice