xref: /openbmc/u-boot/Kconfig (revision b35fb6ac)
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 BROKEN
18	bool
19	help
20	  This option cannot be enabled. It is used as dependency
21	  for broken and incomplete features.
22
23config LOCALVERSION
24	string "Local version - append to U-Boot release"
25	help
26	  Append an extra string to the end of your U-Boot version.
27	  This will show up in your boot log, for example.
28	  The string you set here will be appended after the contents of
29	  any files with a filename matching localversion* in your
30	  object and source tree, in that order.  Your total string can
31	  be a maximum of 64 characters.
32
33config LOCALVERSION_AUTO
34	bool "Automatically append version information to the version string"
35	default y
36	help
37	  This will try to automatically determine if the current tree is a
38	  release tree by looking for Git tags that belong to the current
39	  top of tree revision.
40
41	  A string of the format -gxxxxxxxx will be added to the localversion
42	  if a Git-based tree is found.  The string generated by this will be
43	  appended after any matching localversion* files, and after the value
44	  set in CONFIG_LOCALVERSION.
45
46	  (The actual string used here is the first eight characters produced
47	  by running the command:
48
49	    $ git rev-parse --verify HEAD
50
51	  which is done within the script "scripts/setlocalversion".)
52
53config CC_OPTIMIZE_FOR_SIZE
54	bool "Optimize for size"
55	default y
56	help
57	  Enabling this option will pass "-Os" instead of "-O2" to gcc
58	  resulting in a smaller U-Boot image.
59
60	  This option is enabled by default for U-Boot.
61
62config CC_COVERAGE
63	bool "Enable code coverage analysis"
64	depends on SANDBOX
65	help
66	  Enabling this option will pass "--coverage" to gcc to compile
67	  and link code instrumented for coverage analysis.
68
69config DISTRO_DEFAULTS
70	bool "Select defaults suitable for booting general purpose Linux distributions"
71	imply USE_BOOTCOMMAND
72	select CMD_BOOTZ if ARM && !ARM64
73	select CMD_BOOTI if ARM64
74	select CMD_DHCP if CMD_NET
75	select CMD_PING if CMD_NET
76	select CMD_PXE if NET
77	select CMD_ENV_EXISTS
78	select CMD_EXT2
79	select CMD_EXT4
80	select CMD_FAT
81	select CMD_FS_GENERIC
82	imply CMD_MII if NET
83	select CMD_PART if PARTITIONS
84	select HUSH_PARSER
85	select CMDLINE_EDITING
86	select AUTO_COMPLETE
87	select SYS_LONGHELP
88	select SUPPORT_RAW_INITRD
89	select ENV_VARS_UBOOT_CONFIG
90	help
91	  Select this to enable various options and commands which are suitable
92	  for building u-boot for booting general purpose Linux distributions.
93
94config ENV_VARS_UBOOT_CONFIG
95	bool "Add arch, board, vendor and soc variables to default environment"
96	help
97	  Define this in order to add variables describing the
98	  U-Boot build configuration to the default environment.
99	  These will be named arch, cpu, board, vendor, and soc.
100	  Enabling this option will cause the following to be defined:
101	  - CONFIG_SYS_ARCH
102	  - CONFIG_SYS_CPU
103	  - CONFIG_SYS_BOARD
104	  - CONFIG_SYS_VENDOR
105	  - CONFIG_SYS_SOC
106
107config SYS_BOOT_GET_CMDLINE
108	bool "Enable kernel command line setup"
109	help
110	  Enables allocating and saving kernel cmdline in space between
111	  "bootm_low" and "bootm_low" + BOOTMAPSZ.
112
113config SYS_BOOT_GET_KBD
114	bool "Enable kernel board information setup"
115	help
116	  Enables allocating and saving a kernel copy of the bd_info in
117	  space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
118
119config SYS_MALLOC_F
120	bool "Enable malloc() pool before relocation"
121	default y if DM
122	help
123	  Before relocation, memory is very limited on many platforms. Still,
124	  we can provide a small malloc() pool if needed. Driver model in
125	  particular needs this to operate, so that it can allocate the
126	  initial serial device and any others that are needed.
127
128config SYS_MALLOC_F_LEN
129	hex "Size of malloc() pool before relocation"
130	depends on SYS_MALLOC_F
131	default 0x1000 if AM33XX
132	default 0x400
133	help
134	  Before relocation, memory is very limited on many platforms. Still,
135	  we can provide a small malloc() pool if needed. Driver model in
136	  particular needs this to operate, so that it can allocate the
137	  initial serial device and any others that are needed.
138
139config SPL_SYS_MALLOC_F_LEN
140        hex "Size of malloc() pool in SPL before relocation"
141        depends on SYS_MALLOC_F
142        default SYS_MALLOC_F_LEN
143        help
144          Before relocation, memory is very limited on many platforms. Still,
145          we can provide a small malloc() pool if needed. Driver model in
146          particular needs this to operate, so that it can allocate the
147          initial serial device and any others that are needed.
148
149config TPL_SYS_MALLOC_F_LEN
150        hex "Size of malloc() pool in TPL before relocation"
151        depends on SYS_MALLOC_F
152        default SYS_MALLOC_F_LEN
153        help
154          Before relocation, memory is very limited on many platforms. Still,
155          we can provide a small malloc() pool if needed. Driver model in
156          particular needs this to operate, so that it can allocate the
157          initial serial device and any others that are needed.
158
159menuconfig EXPERT
160	bool "Configure standard U-Boot features (expert users)"
161	default y
162	help
163	  This option allows certain base U-Boot options and settings
164	  to be disabled or tweaked. This is for specialized
165	  environments which can tolerate a "non-standard" U-Boot.
166	  Use this only if you really know what you are doing.
167
168if EXPERT
169	config SYS_MALLOC_CLEAR_ON_INIT
170	bool "Init with zeros the memory reserved for malloc (slow)"
171	default y
172	help
173	  This setting is enabled by default. The reserved malloc
174	  memory is initialized with zeros, so first malloc calls
175	  will return the pointer to the zeroed memory. But this
176	  slows the boot time.
177
178	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
179	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
180	  Then the boot time can be significantly reduced.
181	  Warning:
182	  When disabling this, please check if malloc calls, maybe
183	  should be replaced by calloc - if one expects zeroed memory.
184
185config TOOLS_DEBUG
186	bool "Enable debug information for tools"
187	help
188	  Enable generation of debug information for tools such as mkimage.
189	  This can be used for debugging purposes. With debug information
190	  it is possible to set breakpoints on particular lines, single-step
191	  debug through the source code, etc.
192
193endif # EXPERT
194
195config PHYS_64BIT
196	bool "64bit physical address support"
197	help
198	  Say Y here to support 64bit physical memory address.
199	  This can be used not only for 64bit SoCs, but also for
200	  large physical address extention on 32bit SoCs.
201
202config BUILD_ROM
203	bool "Build U-Boot as BIOS replacement"
204	depends on X86
205	help
206	  This option allows to build a ROM version of U-Boot.
207	  The build process generally requires several binary blobs
208	  which are not shipped in the U-Boot source tree.
209	  Please, see doc/README.x86 for details.
210
211endmenu		# General setup
212
213menu "Boot images"
214
215config ANDROID_BOOT_IMAGE
216	bool "Enable support for Android Boot Images"
217	default y if FASTBOOT
218	help
219	  This enables support for booting images which use the Android
220	  image format header.
221
222config FIT
223	bool "Support Flattened Image Tree"
224	select MD5
225	select SHA1
226	help
227	  This option allows you to boot the new uImage structure,
228	  Flattened Image Tree.  FIT is formally a FDT, which can include
229	  images of various types (kernel, FDT blob, ramdisk, etc.)
230	  in a single blob.  To boot this new uImage structure,
231	  pass the address of the blob to the "bootm" command.
232	  FIT is very flexible, supporting compression, multiple images,
233	  multiple configurations, verification through hashing and also
234	  verified boot (secure boot using RSA).
235
236if FIT
237
238config FIT_ENABLE_SHA256_SUPPORT
239	bool "Support SHA256 checksum of FIT image contents"
240	select SHA256
241	default y
242	help
243	  Enable this to support SHA256 checksum of FIT image contents. A
244	  SHA256 checksum is a 256-bit (32-byte) hash value used to check that
245	  the image contents have not been corrupted. SHA256 is recommended
246	  for use in secure applications since (as at 2016) there is no known
247	  feasible attack that could produce a 'collision' with differing
248	  input data. Use this for the highest security. Note that only the
249	  SHA256 variant is supported: SHA512 and others are not currently
250	  supported in U-Boot.
251
252config FIT_SIGNATURE
253	bool "Enable signature verification of FIT uImages"
254	depends on DM
255	select RSA
256	select HASH
257	help
258	  This option enables signature verification of FIT uImages,
259	  using a hash signed and verified using RSA. If
260	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
261	  hashing is available using hardware, then the RSA library will use
262	  it. See doc/uImage.FIT/signature.txt for more details.
263
264	  WARNING: When relying on signed FIT images with a required signature
265	  check the legacy image format is disabled by default, so that
266	  unsigned images cannot be loaded. If a board needs the legacy image
267	  format support in this case, enable it using
268	  CONFIG_IMAGE_FORMAT_LEGACY.
269
270config FIT_SIGNATURE_MAX_SIZE
271	hex "Max size of signed FIT structures"
272	depends on FIT_SIGNATURE
273	default 0x10000000
274	help
275	  This option sets a max size in bytes for verified FIT uImages.
276	  A sane value of 256MB protects corrupted DTB structures from overlapping
277	  device memory. Assure this size does not extend past expected storage
278	  space.
279
280config FIT_VERBOSE
281	bool "Show verbose messages when FIT images fail"
282	help
283	  Generally a system will have valid FIT images so debug messages
284	  are a waste of code space. If you are debugging your images then
285	  you can enable this option to get more verbose information about
286	  failures.
287
288config FIT_BEST_MATCH
289	bool "Select the best match for the kernel device tree"
290	help
291	  When no configuration is explicitly selected, default to the
292	  one whose fdt's compatibility field best matches that of
293	  U-Boot itself. A match is considered "best" if it matches the
294	  most specific compatibility entry of U-Boot's fdt's root node.
295	  The order of entries in the configuration's fdt is ignored.
296
297config FIT_IMAGE_POST_PROCESS
298	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
299	depends on TI_SECURE_DEVICE
300	help
301	  Allows doing any sort of manipulation to blobs after they got extracted
302	  from FIT images like stripping off headers or modifying the size of the
303	  blob, verification, authentication, decryption etc. in a platform or
304	  board specific way. In order to use this feature a platform or board-
305	  specific implementation of board_fit_image_post_process() must be
306	  provided. Also, anything done during this post-processing step would
307	  need to be comprehended in how the images were prepared before being
308	  injected into the FIT creation (i.e. the blobs would have been pre-
309	  processed before being added to the FIT image).
310
311if SPL
312
313config SPL_FIT
314	bool "Support Flattened Image Tree within SPL"
315	depends on SPL
316	select SPL_OF_LIBFDT
317
318config SPL_FIT_PRINT
319	bool "Support FIT printing within SPL"
320	depends on SPL_FIT
321	help
322	  Support printing the content of the fitImage in a verbose manner in SPL.
323
324config SPL_FIT_SIGNATURE
325	bool "Enable signature verification of FIT firmware within SPL"
326	depends on SPL_DM
327	select SPL_FIT
328	select SPL_RSA
329
330config SPL_LOAD_FIT
331	bool "Enable SPL loading U-Boot as a FIT"
332	select SPL_FIT
333	help
334	  Normally with the SPL framework a legacy image is generated as part
335	  of the build. This contains U-Boot along with information as to
336	  where it should be loaded. This option instead enables generation
337	  of a FIT (Flat Image Tree) which provides more flexibility. In
338	  particular it can handle selecting from multiple device tree
339	  and passing the correct one to U-Boot.
340
341config SPL_LOAD_FIT_FULL
342	bool "Enable SPL loading U-Boot as a FIT"
343	select SPL_FIT
344	help
345	  Normally with the SPL framework a legacy image is generated as part
346	  of the build. This contains U-Boot along with information as to
347	  where it should be loaded. This option instead enables generation
348	  of a FIT (Flat Image Tree) which provides more flexibility. In
349	  particular it can handle selecting from multiple device tree
350	  and passing the correct one to U-Boot.
351
352config SPL_FIT_IMAGE_POST_PROCESS
353	bool "Enable post-processing of FIT artifacts after loading by the SPL"
354	depends on SPL_LOAD_FIT
355	help
356	  Allows doing any sort of manipulation to blobs after they got extracted
357	  from the U-Boot FIT image like stripping off headers or modifying the
358	  size of the blob, verification, authentication, decryption etc. in a
359	  platform or board specific way. In order to use this feature a platform
360	  or board-specific implementation of board_fit_image_post_process() must
361	  be provided. Also, anything done during this post-processing step would
362	  need to be comprehended in how the images were prepared before being
363	  injected into the FIT creation (i.e. the blobs would have been pre-
364	  processed before being added to the FIT image).
365
366config SPL_FIT_SOURCE
367	string ".its source file for U-Boot FIT image"
368	depends on SPL_FIT
369	help
370	  Specifies a (platform specific) FIT source file to generate the
371	  U-Boot FIT image. This could specify further image to load and/or
372	  execute.
373
374config SPL_FIT_GENERATOR
375	string ".its file generator script for U-Boot FIT image"
376	depends on SPL_FIT
377	default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
378	help
379	  Specifies a (platform specific) script file to generate the FIT
380	  source file used to build the U-Boot FIT image file. This gets
381	  passed a list of supported device tree file stub names to
382	  include in the generated image.
383
384endif # SPL
385
386endif # FIT
387
388config IMAGE_FORMAT_LEGACY
389	bool "Enable support for the legacy image format"
390	default y if !FIT_SIGNATURE
391	help
392	  This option enables the legacy image format. It is enabled by
393	  default for backward compatibility, unless FIT_SIGNATURE is
394	  set where it is disabled so that unsigned images cannot be
395	  loaded. If a board needs the legacy image format support in this
396	  case, enable it here.
397
398config OF_BOARD_SETUP
399	bool "Set up board-specific details in device tree before boot"
400	depends on OF_LIBFDT
401	help
402	  This causes U-Boot to call ft_board_setup() before booting into
403	  the Operating System. This function can set up various
404	  board-specific information in the device tree for use by the OS.
405	  The device tree is then passed to the OS.
406
407config OF_SYSTEM_SETUP
408	bool "Set up system-specific details in device tree before boot"
409	depends on OF_LIBFDT
410	help
411	  This causes U-Boot to call ft_system_setup() before booting into
412	  the Operating System. This function can set up various
413	  system-specific information in the device tree for use by the OS.
414	  The device tree is then passed to the OS.
415
416config OF_STDOUT_VIA_ALIAS
417	bool "Update the device-tree stdout alias from U-Boot"
418	depends on OF_LIBFDT
419	help
420	  This uses U-Boot's serial alias from the aliases node to update
421	  the device tree passed to the OS. The "linux,stdout-path" property
422	  in the chosen node is set to point to the correct serial node.
423	  This option currently references CONFIG_CONS_INDEX, which is
424	  incorrect when used with device tree as this option does not
425	  exist / should not be used.
426
427config SYS_EXTRA_OPTIONS
428	string "Extra Options (DEPRECATED)"
429	help
430	  The old configuration infrastructure (= mkconfig + boards.cfg)
431	  provided the extra options field. If you have something like
432	  "HAS_BAR,BAZ=64", the optional options
433	    #define CONFIG_HAS
434	    #define CONFIG_BAZ	64
435	  will be defined in include/config.h.
436	  This option was prepared for the smooth migration from the old
437	  configuration to Kconfig. Since this option will be removed sometime,
438	  new boards should not use this option.
439
440config SYS_TEXT_BASE
441	depends on !NIOS2 && !XTENSA
442	depends on !EFI_APP
443	default 0x80800000 if ARCH_OMAP2PLUS
444	default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
445	default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
446	default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
447	hex "Text Base"
448	help
449	  The address in memory that U-Boot will be running from, initially.
450
451
452
453config SYS_CLK_FREQ
454	depends on ARC || ARCH_SUNXI
455	int "CPU clock frequency"
456	help
457	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
458
459config ARCH_FIXUP_FDT_MEMORY
460	bool "Enable arch_fixup_memory_banks() call"
461	default y
462	help
463	  Enable FDT memory map syncup before OS boot. This feature can be
464	  used for booting OS with different memory setup where the part of
465	  the memory location should be used for different purpose.
466
467endmenu		# Boot images
468
469source "api/Kconfig"
470
471source "common/Kconfig"
472
473source "cmd/Kconfig"
474
475source "disk/Kconfig"
476
477source "dts/Kconfig"
478
479source "env/Kconfig"
480
481source "net/Kconfig"
482
483source "drivers/Kconfig"
484
485source "fs/Kconfig"
486
487source "lib/Kconfig"
488
489source "test/Kconfig"
490