xref: /openbmc/u-boot/Kconfig (revision d5abcf94)
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 || TEGRA
59	default y if ARCH_LS2080A
60	default y if ARCH_MESON
61	default y if ARCH_ROCKCHIP
62	default n
63	select CMD_BOOTZ if ARM && !ARM64
64	select CMD_BOOTI if ARM64
65	select CMD_DHCP
66	select CMD_PXE
67	select CMD_EXT2
68	select CMD_EXT4
69	select CMD_FAT
70	select CMD_FS_GENERIC
71	select CMD_MII
72	select CMD_PING
73	select CMD_PART
74	select HUSH_PARSER
75	help
76	  Select this to enable various options and commands which are suitable
77	  for building u-boot for booting general purpose Linux distributions.
78
79config SYS_MALLOC_F
80	bool "Enable malloc() pool before relocation"
81	default y if DM
82	help
83	  Before relocation, memory is very limited on many platforms. Still,
84	  we can provide a small malloc() pool if needed. Driver model in
85	  particular needs this to operate, so that it can allocate the
86	  initial serial device and any others that are needed.
87
88config SYS_MALLOC_F_LEN
89	hex "Size of malloc() pool before relocation"
90	depends on SYS_MALLOC_F
91	default 0x400
92	help
93	  Before relocation, memory is very limited on many platforms. Still,
94	  we can provide a small malloc() pool if needed. Driver model in
95	  particular needs this to operate, so that it can allocate the
96	  initial serial device and any others that are needed.
97
98menuconfig EXPERT
99	bool "Configure standard U-Boot features (expert users)"
100	default y
101	help
102	  This option allows certain base U-Boot options and settings
103	  to be disabled or tweaked. This is for specialized
104	  environments which can tolerate a "non-standard" U-Boot.
105	  Use this only if you really know what you are doing.
106
107if EXPERT
108	config SYS_MALLOC_CLEAR_ON_INIT
109	bool "Init with zeros the memory reserved for malloc (slow)"
110	default y
111	help
112	  This setting is enabled by default. The reserved malloc
113	  memory is initialized with zeros, so first malloc calls
114	  will return the pointer to the zeroed memory. But this
115	  slows the boot time.
116
117	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
118	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
119	  Then the boot time can be significantly reduced.
120	  Warning:
121	  When disabling this, please check if malloc calls, maybe
122	  should be replaced by calloc - if one expects zeroed memory.
123
124config TOOLS_DEBUG
125	bool "Enable debug information for tools"
126	help
127	  Enable generation of debug information for tools such as mkimage.
128	  This can be used for debugging purposes. With debug information
129	  it is possible to set breakpoints on particular lines, single-step
130	  debug through the source code, etc.
131
132endif # EXPERT
133
134config PHYS_64BIT
135	bool "64bit physical address support"
136	help
137	  Say Y here to support 64bit physical memory address.
138	  This can be used not only for 64bit SoCs, but also for
139	  large physical address extention on 32bit SoCs.
140
141endmenu		# General setup
142
143menu "Boot images"
144
145config FIT
146	bool "Support Flattened Image Tree"
147	select MD5
148	help
149	  This option allows you to boot the new uImage structure,
150	  Flattened Image Tree.  FIT is formally a FDT, which can include
151	  images of various types (kernel, FDT blob, ramdisk, etc.)
152	  in a single blob.  To boot this new uImage structure,
153	  pass the address of the blob to the "bootm" command.
154	  FIT is very flexible, supporting compression, multiple images,
155	  multiple configurations, verification through hashing and also
156	  verified boot (secure boot using RSA).
157
158if FIT
159
160config FIT_SIGNATURE
161	bool "Enable signature verification of FIT uImages"
162	depends on DM
163	select RSA
164	help
165	  This option enables signature verification of FIT uImages,
166	  using a hash signed and verified using RSA. If
167	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
168	  hashing is available using hardware, then the RSA library will use
169	  it. See doc/uImage.FIT/signature.txt for more details.
170
171	  WARNING: When relying on signed FIT images with a required signature
172	  check the legacy image format is disabled by default, so that
173	  unsigned images cannot be loaded. If a board needs the legacy image
174	  format support in this case, enable it using
175	  CONFIG_IMAGE_FORMAT_LEGACY.
176
177config FIT_VERBOSE
178	bool "Show verbose messages when FIT images fail"
179	help
180	  Generally a system will have valid FIT images so debug messages
181	  are a waste of code space. If you are debugging your images then
182	  you can enable this option to get more verbose information about
183	  failures.
184
185config FIT_BEST_MATCH
186	bool "Select the best match for the kernel device tree"
187	help
188	  When no configuration is explicitly selected, default to the
189	  one whose fdt's compatibility field best matches that of
190	  U-Boot itself. A match is considered "best" if it matches the
191	  most specific compatibility entry of U-Boot's fdt's root node.
192	  The order of entries in the configuration's fdt is ignored.
193
194config FIT_IMAGE_POST_PROCESS
195	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
196	depends on TI_SECURE_DEVICE
197	help
198	  Allows doing any sort of manipulation to blobs after they got extracted
199	  from FIT images like stripping off headers or modifying the size of the
200	  blob, verification, authentication, decryption etc. in a platform or
201	  board specific way. In order to use this feature a platform or board-
202	  specific implementation of board_fit_image_post_process() must be
203	  provided. Also, anything done during this post-processing step would
204	  need to be comprehended in how the images were prepared before being
205	  injected into the FIT creation (i.e. the blobs would have been pre-
206	  processed before being added to the FIT image).
207
208config SPL_FIT
209	bool "Support Flattened Image Tree within SPL"
210	depends on SPL
211
212config SPL_FIT_SIGNATURE
213	bool "Enable signature verification of FIT firmware within SPL"
214	depends on SPL_FIT
215	depends on SPL_DM
216	select SPL_RSA
217
218config SPL_LOAD_FIT
219	bool "Enable SPL loading U-Boot as a FIT"
220	help
221	  Normally with the SPL framework a legacy image is generated as part
222	  of the build. This contains U-Boot along with information as to
223	  where it should be loaded. This option instead enables generation
224	  of a FIT (Flat Image Tree) which provides more flexibility. In
225	  particular it can handle selecting from multiple device tree
226	  and passing the correct one to U-Boot.
227
228config SPL_FIT_IMAGE_POST_PROCESS
229	bool "Enable post-processing of FIT artifacts after loading by the SPL"
230	depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
231	help
232	  Allows doing any sort of manipulation to blobs after they got extracted
233	  from the U-Boot FIT image like stripping off headers or modifying the
234	  size of the blob, verification, authentication, decryption etc. in a
235	  platform or board specific way. In order to use this feature a platform
236	  or board-specific implementation of board_fit_image_post_process() must
237	  be provided. Also, anything done during this post-processing step would
238	  need to be comprehended in how the images were prepared before being
239	  injected into the FIT creation (i.e. the blobs would have been pre-
240	  processed before being added to the FIT image).
241
242endif # FIT
243
244config OF_BOARD_SETUP
245	bool "Set up board-specific details in device tree before boot"
246	depends on OF_LIBFDT
247	help
248	  This causes U-Boot to call ft_board_setup() before booting into
249	  the Operating System. This function can set up various
250	  board-specific information in the device tree for use by the OS.
251	  The device tree is then passed to the OS.
252
253config OF_SYSTEM_SETUP
254	bool "Set up system-specific details in device tree before boot"
255	depends on OF_LIBFDT
256	help
257	  This causes U-Boot to call ft_system_setup() before booting into
258	  the Operating System. This function can set up various
259	  system-specific information in the device tree for use by the OS.
260	  The device tree is then passed to the OS.
261
262config OF_STDOUT_VIA_ALIAS
263	bool "Update the device-tree stdout alias from U-Boot"
264	depends on OF_LIBFDT
265	help
266	  This uses U-Boot's serial alias from the aliases node to update
267	  the device tree passed to the OS. The "linux,stdout-path" property
268	  in the chosen node is set to point to the correct serial node.
269	  This option currently references CONFIG_CONS_INDEX, which is
270	  incorrect when used with device tree as this option does not
271	  exist / should not be used.
272
273config SYS_EXTRA_OPTIONS
274	string "Extra Options (DEPRECATED)"
275	help
276	  The old configuration infrastructure (= mkconfig + boards.cfg)
277	  provided the extra options field. If you have something like
278	  "HAS_BAR,BAZ=64", the optional options
279	    #define CONFIG_HAS
280	    #define CONFIG_BAZ	64
281	  will be defined in include/config.h.
282	  This option was prepared for the smooth migration from the old
283	  configuration to Kconfig. Since this option will be removed sometime,
284	  new boards should not use this option.
285
286config SYS_TEXT_BASE
287	depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
288		(M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS || \
289		ARCH_ZYNQ
290	depends on !EFI_APP
291	hex "Text Base"
292	help
293	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
294
295
296config SYS_CLK_FREQ
297	depends on ARC || ARCH_SUNXI
298	int "CPU clock frequency"
299	help
300	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
301
302config ARCH_FIXUP_FDT_MEMORY
303	bool "Enable arch_fixup_memory_banks() call"
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 "api/Kconfig"
313
314source "common/Kconfig"
315
316source "cmd/Kconfig"
317
318source "disk/Kconfig"
319
320source "dts/Kconfig"
321
322source "net/Kconfig"
323
324source "drivers/Kconfig"
325
326source "fs/Kconfig"
327
328source "lib/Kconfig"
329
330source "test/Kconfig"
331
332source "scripts/Kconfig"
333