xref: /openbmc/u-boot/Kconfig (revision 53ab4af3) 
1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5mainmenu "U-Boot $UBOOTVERSION Configuration"
6
7config UBOOTVERSION
8	string
9	option env="UBOOTVERSION"
10
11# Allow defaults in arch-specific code to override any given here
12source "arch/Kconfig"
13
14menu "General setup"
15
16config LOCALVERSION
17	string "Local version - append to U-Boot release"
18	help
19	  Append an extra string to the end of your U-Boot version.
20	  This will show up on your boot log, for example.
21	  The string you set here will be appended after the contents of
22	  any files with a filename matching localversion* in your
23	  object and source tree, in that order.  Your total string can
24	  be a maximum of 64 characters.
25
26config LOCALVERSION_AUTO
27	bool "Automatically append version information to the version string"
28	default y
29	help
30	  This will try to automatically determine if the current tree is a
31	  release tree by looking for git tags that belong to the current
32	  top of tree revision.
33
34	  A string of the format -gxxxxxxxx will be added to the localversion
35	  if a git-based tree is found.  The string generated by this will be
36	  appended after any matching localversion* files, and after the value
37	  set in CONFIG_LOCALVERSION.
38
39	  (The actual string used here is the first eight characters produced
40	  by running the command:
41
42	    $ git rev-parse --verify HEAD
43
44	  which is done within the script "scripts/setlocalversion".)
45
46config CC_OPTIMIZE_FOR_SIZE
47	bool "Optimize for size"
48	default y
49	help
50	  Enabling this option will pass "-Os" instead of "-O2" to gcc
51	  resulting in a smaller U-Boot image.
52
53	  This option is enabled by default for U-Boot.
54
55config SYS_MALLOC_F
56	bool "Enable malloc() pool before relocation"
57	default y if DM
58	help
59	  Before relocation memory is very limited on many platforms. Still,
60	  we can provide a small malloc() pool if needed. Driver model in
61	  particular needs this to operate, so that it can allocate the
62	  initial serial device and any others that are needed.
63
64config SYS_MALLOC_F_LEN
65	hex "Size of malloc() pool before relocation"
66	depends on SYS_MALLOC_F
67	default 0x400
68	help
69	  Before relocation memory is very limited on many platforms. Still,
70	  we can provide a small malloc() pool if needed. Driver model in
71	  particular needs this to operate, so that it can allocate the
72	  initial serial device and any others that are needed.
73
74menuconfig EXPERT
75	bool "Configure standard U-Boot features (expert users)"
76	default y
77	help
78	  This option allows certain base U-Boot options and settings
79	  to be disabled or tweaked. This is for specialized
80	  environments which can tolerate a "non-standard" U-Boot.
81	  Only use this if you really know what you are doing.
82
83if EXPERT
84	config SYS_MALLOC_CLEAR_ON_INIT
85	bool "Init with zeros the memory reserved for malloc (slow)"
86	default y
87	help
88	  This setting is enabled by default. The reserved malloc
89	  memory is initialized with zeros, so first malloc calls
90	  will return the pointer to the zeroed memory. But this
91	  slows the boot time.
92
93	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
94	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
95	  Then the boot time can be significantly reduced.
96	  Warning:
97	  When disabling this, please check if malloc calls, maybe
98	  should be replaced by calloc - if expects zeroed memory.
99endif
100endmenu		# General setup
101
102menu "Boot images"
103
104config SUPPORT_SPL
105	bool
106
107config SUPPORT_TPL
108	bool
109
110config SPL
111	bool
112	depends on SUPPORT_SPL
113	prompt "Enable SPL"
114	help
115	  If you want to build SPL as well as the normal image, say Y.
116
117config SPL_STACK_R
118	depends on SPL
119	bool "Enable SDRAM location for SPL stack"
120	help
121	  SPL starts off execution in SRAM and thus typically has only a small
122	  stack available. Since SPL sets up DRAM while in its board_init_f()
123	  function, it is possible for the stack to move there before
124	  board_init_r() is reached. This option enables a special SDRAM
125	  location for the SPL stack. U-Boot SPL switches to this after
126	  board_init_f() completes, and before board_init_r() starts.
127
128config SPL_STACK_R_ADDR
129	depends on SPL_STACK_R
130	hex "SDRAM location for SPL stack"
131	help
132	  Specify the address in SDRAM for the SPL stack. This will be set up
133	  before board_init_r() is called.
134
135config TPL
136	bool
137	depends on SPL && SUPPORT_TPL
138	prompt "Enable TPL"
139	help
140	  If you want to build TPL as well as the normal image and SPL, say Y.
141
142config FIT
143	bool "Support Flattened Image Tree"
144	help
145	  This option allows to boot the new uImage structrure,
146	  Flattened Image Tree.  FIT is formally a FDT, which can include
147	  images of various types (kernel, FDT blob, ramdisk, etc.)
148	  in a single blob.  To boot this new uImage structure,
149	  pass the the address of the blob to the "bootm" command.
150
151config FIT_VERBOSE
152	bool "Display verbose messages on FIT boot"
153	depends on FIT
154
155config FIT_SIGNATURE
156	bool "Enable signature verification of FIT uImages"
157	depends on FIT
158	depends on DM
159	select RSA
160	help
161	  This option enables signature verification of FIT uImages,
162	  using a hash signed and verified using RSA. If
163	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
164	  hashing is available using hardware, RSA library will use it.
165	  See doc/uImage.FIT/signature.txt for more details.
166
167config SYS_EXTRA_OPTIONS
168	string "Extra Options (DEPRECATED)"
169	help
170	  The old configuration infrastructure (= mkconfig + boards.cfg)
171	  provided the extra options field. If you have something like
172	  "HAS_BAR,BAZ=64", the optional options
173	    #define CONFIG_HAS
174	    #define CONFIG_BAZ	64
175	  will be defined in include/config.h.
176	  This option was prepared for the smooth migration from the old
177	  configuration to Kconfig. Since this option will be removed sometime,
178	  new boards should not use this option.
179
180config SYS_TEXT_BASE
181	depends on SPARC || ARC
182	hex "Text Base"
183	help
184	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
185
186config SYS_CLK_FREQ
187	depends on ARC || ARCH_SUNXI
188	int "CPU clock frequency"
189	help
190	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
191
192endmenu		# Boot images
193
194source "common/Kconfig"
195
196source "dts/Kconfig"
197
198source "net/Kconfig"
199
200source "drivers/Kconfig"
201
202source "fs/Kconfig"
203
204source "lib/Kconfig"
205
206source "test/Kconfig"
207