1config EFI
2	bool "Support running U-Boot from EFI"
3	depends on X86
4	imply X86_TSC_READ_BASE
5	help
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.
10
11choice
12	prompt "Select EFI mode to use"
13	depends on X86 && EFI
14
15config EFI_APP
16	bool "Support running as an EFI application"
17	select CHARSET
18	help
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
23	  to EFI.
24
25config EFI_STUB
26	bool "Support running as an EFI payload"
27
28endchoice
29
30choice
31	prompt "EFI app 32/64-bit selection"
32	depends on EFI_APP
33	help
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!
39
40config EFI_APP_32BIT
41	bool "Produce an app for running with 32-bit EFI"
42
43config EFI_APP_64BIT
44	bool "Produce an app for running with 64-bit EFI"
45
46endchoice
47
48choice
49	prompt "EFI stub 32/64-bit selection"
50	depends on EFI_STUB
51	help
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!
57
58config EFI_STUB_32BIT
59	bool "Produce a stub for running with 32-bit EFI"
60
61config EFI_STUB_64BIT
62	bool "Produce a stub for running with 64-bit EFI"
63
64endchoice
65
66config EFI_RAM_SIZE
67	hex "Amount of EFI RAM for U-Boot"
68	depends on EFI_APP
69	default 0x10000000
70	help
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.
75