xref: /openbmc/u-boot/Kconfig (revision d9e268ed)
1#
2# For a description of the syntax of this configuration file,
3# see the file Documentation/kbuild/kconfig-language.txt in the
4# Linux kernel source tree.
5#
6mainmenu "U-Boot $UBOOTVERSION Configuration"
7
8config UBOOTVERSION
9	string
10	option env="UBOOTVERSION"
11
12# Allow defaults in arch-specific code to override any given here
13source "arch/Kconfig"
14
15menu "General setup"
16
17config LOCALVERSION
18	string "Local version - append to U-Boot release"
19	help
20	  Append an extra string to the end of your U-Boot version.
21	  This will show up in your boot log, for example.
22	  The string you set here will be appended after the contents of
23	  any files with a filename matching localversion* in your
24	  object and source tree, in that order.  Your total string can
25	  be a maximum of 64 characters.
26
27config LOCALVERSION_AUTO
28	bool "Automatically append version information to the version string"
29	default y
30	help
31	  This will try to automatically determine if the current tree is a
32	  release tree by looking for Git tags that belong to the current
33	  top of tree revision.
34
35	  A string of the format -gxxxxxxxx will be added to the localversion
36	  if a Git-based tree is found.  The string generated by this will be
37	  appended after any matching localversion* files, and after the value
38	  set in CONFIG_LOCALVERSION.
39
40	  (The actual string used here is the first eight characters produced
41	  by running the command:
42
43	    $ git rev-parse --verify HEAD
44
45	  which is done within the script "scripts/setlocalversion".)
46
47config CC_OPTIMIZE_FOR_SIZE
48	bool "Optimize for size"
49	default y
50	help
51	  Enabling this option will pass "-Os" instead of "-O2" to gcc
52	  resulting in a smaller U-Boot image.
53
54	  This option is enabled by default for U-Boot.
55
56config DISTRO_DEFAULTS
57	bool "Select defaults suitable for booting general purpose Linux distributions"
58	default y if ARCH_SUNXI
59	default y if ARCH_LS2080A
60	default n
61	select CMD_BOOTZ if ARM && !ARM64
62	select CMD_BOOTI if ARM64
63	select CMD_DHCP
64	select CMD_EXT2
65	select CMD_EXT4
66	select CMD_FAT
67	select CMD_FS_GENERIC
68	select CMD_MII
69	select CMD_PING
70	select HUSH_PARSER
71	help
72	  Select this to enable various options and commands which are suitable
73	  for building u-boot for booting general purpose Linux distributions.
74
75config SYS_MALLOC_F
76	bool "Enable malloc() pool before relocation"
77	default y if DM
78	help
79	  Before relocation, memory is very limited on many platforms. Still,
80	  we can provide a small malloc() pool if needed. Driver model in
81	  particular needs this to operate, so that it can allocate the
82	  initial serial device and any others that are needed.
83
84config SYS_MALLOC_F_LEN
85	hex "Size of malloc() pool before relocation"
86	depends on SYS_MALLOC_F
87	default 0x400
88	help
89	  Before relocation, memory is very limited on many platforms. Still,
90	  we can provide a small malloc() pool if needed. Driver model in
91	  particular needs this to operate, so that it can allocate the
92	  initial serial device and any others that are needed.
93
94menuconfig EXPERT
95	bool "Configure standard U-Boot features (expert users)"
96	default y
97	help
98	  This option allows certain base U-Boot options and settings
99	  to be disabled or tweaked. This is for specialized
100	  environments which can tolerate a "non-standard" U-Boot.
101	  Use this only if you really know what you are doing.
102
103if EXPERT
104	config SYS_MALLOC_CLEAR_ON_INIT
105	bool "Init with zeros the memory reserved for malloc (slow)"
106	default y
107	help
108	  This setting is enabled by default. The reserved malloc
109	  memory is initialized with zeros, so first malloc calls
110	  will return the pointer to the zeroed memory. But this
111	  slows the boot time.
112
113	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
114	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
115	  Then the boot time can be significantly reduced.
116	  Warning:
117	  When disabling this, please check if malloc calls, maybe
118	  should be replaced by calloc - if one expects zeroed memory.
119
120config TOOLS_DEBUG
121	bool "Enable debug information for tools"
122	help
123	  Enable generation of debug information for tools such as mkimage.
124	  This can be used for debugging purposes. With debug information
125	  it is possible to set breakpoints on particular lines, single-step
126	  debug through the source code, etc.
127
128endif
129
130config PHYS_64BIT
131	bool "64bit physical address support"
132	help
133	  Say Y here to support 64bit physical memory address.
134	  This can be used not only for 64bit SoCs, but also for
135	  large physical address extention on 32bit SoCs.
136
137endmenu		# General setup
138
139menu "Boot images"
140
141config FIT
142	bool "Support Flattened Image Tree"
143	help
144	  This option allows to boot the new uImage structrure,
145	  Flattened Image Tree.  FIT is formally a FDT, which can include
146	  images of various types (kernel, FDT blob, ramdisk, etc.)
147	  in a single blob.  To boot this new uImage structure,
148	  pass the address of the blob to the "bootm" command.
149	  FIT is very flexible, supporting compression, multiple images,
150	  multiple configurations, verification through hashing and also
151	  verified boot (secure boot using RSA). This option enables that
152	  feature.
153
154config SPL_FIT
155	bool "Support Flattened Image Tree within SPL"
156	depends on FIT
157	depends on SPL
158
159config FIT_VERBOSE
160	bool "Display verbose messages on FIT boot"
161	depends on FIT
162
163config FIT_SIGNATURE
164	bool "Enable signature verification of FIT uImages"
165	depends on FIT
166	depends on DM
167	select RSA
168	help
169	  This option enables signature verification of FIT uImages,
170	  using a hash signed and verified using RSA. If
171	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
172	  hashing is available using hardware, then then RSA library will use
173	  it. See doc/uImage.FIT/signature.txt for more details.
174
175	  WARNING: When relying on signed FIT images with a required signature
176	  check the legacy image format is disabled by default, so that
177	  unsigned images cannot be loaded. If a board needs the legacy image
178	  format support in this case, enable it using
179	  CONFIG_IMAGE_FORMAT_LEGACY.
180
181config SPL_FIT_SIGNATURE
182	bool "Enable signature verification of FIT firmware within SPL"
183	depends on SPL_FIT
184	depends on SPL_DM
185	select SPL_RSA
186
187config FIT_BEST_MATCH
188	bool "Select the best match for the kernel device tree"
189	depends on FIT
190	help
191	  When no configuration is explicitly selected, default to the
192	  one whose fdt's compatibility field best matches that of
193	  U-Boot itself. A match is considered "best" if it matches the
194	  most specific compatibility entry of U-Boot's fdt's root node.
195	  The order of entries in the configuration's fdt is ignored.
196
197config FIT_VERBOSE
198	bool "Show verbose messages when FIT images fails"
199	depends on FIT
200	help
201	  Generally a system will have valid FIT images so debug messages
202	  are a waste of code space. If you are debugging your images then
203	  you can enable this option to get more verbose information about
204	  failures.
205
206config OF_BOARD_SETUP
207	bool "Set up board-specific details in device tree before boot"
208	depends on OF_LIBFDT
209	help
210	  This causes U-Boot to call ft_board_setup() before booting into
211	  the Operating System. This function can set up various
212	  board-specific information in the device tree for use by the OS.
213	  The device tree is then passed to the OS.
214
215config OF_SYSTEM_SETUP
216	bool "Set up system-specific details in device tree before boot"
217	depends on OF_LIBFDT
218	help
219	  This causes U-Boot to call ft_system_setup() before booting into
220	  the Operating System. This function can set up various
221	  system-specific information in the device tree for use by the OS.
222	  The device tree is then passed to the OS.
223
224config OF_STDOUT_VIA_ALIAS
225	bool "Update the device-tree stdout alias from U-Boot"
226	depends on OF_LIBFDT
227	help
228	  This uses U-Boot's serial alias from the aliases node to update
229	  the device tree passed to the OS. The "linux,stdout-path" property
230	  in the chosen node is set to point to the correct serial node.
231	  This option currently references CONFIG_CONS_INDEX, which is
232	  incorrect when used with device tree as this option does not
233	  exist / should not be used.
234
235config SYS_EXTRA_OPTIONS
236	string "Extra Options (DEPRECATED)"
237	help
238	  The old configuration infrastructure (= mkconfig + boards.cfg)
239	  provided the extra options field. If you have something like
240	  "HAS_BAR,BAZ=64", the optional options
241	    #define CONFIG_HAS
242	    #define CONFIG_BAZ	64
243	  will be defined in include/config.h.
244	  This option was prepared for the smooth migration from the old
245	  configuration to Kconfig. Since this option will be removed sometime,
246	  new boards should not use this option.
247
248config SYS_TEXT_BASE
249	depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
250		(M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
251	depends on !EFI_APP
252	hex "Text Base"
253	help
254	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
255
256config SPL_LOAD_FIT
257	bool "Enable SPL loading U-Boot as a FIT"
258	depends on FIT
259	help
260	  Normally with the SPL framework a legacy image is generated as part
261	  of the build. This contains U-Boot along with information as to
262	  where it should be loaded. This option instead enables generation
263	  of a FIT (Flat Image Tree) which provides more flexibility. In
264	  particular it can handle selecting from multiple device tree
265	  and passing the correct one to U-Boot.
266
267config SPL_FIT_IMAGE_POST_PROCESS
268	bool "Enable post-processing of FIT artifacts after loading by the SPL"
269	depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
270	help
271	  Allows doing any sort of manipulation to blobs after they got extracted
272	  from the U-Boot FIT image like stripping off headers or modifying the
273	  size of the blob, verification, authentication, decryption etc. in a
274	  platform or board specific way. In order to use this feature a platform
275	  or board-specific implementation of board_fit_image_post_process() must
276	  be provided. Also, anything done during this post-processing step would
277	  need to be comprehended in how the images were prepared before being
278	  injected into the FIT creation (i.e. the blobs would have been pre-
279	  processed before being added to the FIT image).
280
281config FIT_IMAGE_POST_PROCESS
282	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
283	depends on FIT && TI_SECURE_DEVICE
284	help
285	  Allows doing any sort of manipulation to blobs after they got extracted
286	  from FIT images like stripping off headers or modifying the size of the
287	  blob, verification, authentication, decryption etc. in a platform or
288	  board specific way. In order to use this feature a platform or board-
289	  specific implementation of board_fit_image_post_process() must be
290	  provided. Also, anything done during this post-processing step would
291	  need to be comprehended in how the images were prepared before being
292	  injected into the FIT creation (i.e. the blobs would have been pre-
293	  processed before being added to the FIT image).
294
295config SYS_CLK_FREQ
296	depends on ARC || ARCH_SUNXI
297	int "CPU clock frequency"
298	help
299	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
300
301config ARCH_FIXUP_FDT
302	bool "Enable arch_fixup_fdt() call"
303	depends on ARM || MIPS
304	default y
305	help
306	  Enable FDT memory map syncup before OS boot. This feature can be
307	  used for booting OS with different memory setup where the part of
308	  the memory location should be used for different purpose.
309
310endmenu		# Boot images
311
312source "common/Kconfig"
313
314source "cmd/Kconfig"
315
316source "dts/Kconfig"
317
318source "net/Kconfig"
319
320source "drivers/Kconfig"
321
322source "fs/Kconfig"
323
324source "lib/Kconfig"
325
326source "test/Kconfig"
327