xref: /openbmc/u-boot/Kconfig (revision eba6589f)
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_VERBOSE
271	bool "Show verbose messages when FIT images fail"
272	help
273	  Generally a system will have valid FIT images so debug messages
274	  are a waste of code space. If you are debugging your images then
275	  you can enable this option to get more verbose information about
276	  failures.
277
278config FIT_BEST_MATCH
279	bool "Select the best match for the kernel device tree"
280	help
281	  When no configuration is explicitly selected, default to the
282	  one whose fdt's compatibility field best matches that of
283	  U-Boot itself. A match is considered "best" if it matches the
284	  most specific compatibility entry of U-Boot's fdt's root node.
285	  The order of entries in the configuration's fdt is ignored.
286
287config FIT_IMAGE_POST_PROCESS
288	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
289	depends on TI_SECURE_DEVICE
290	help
291	  Allows doing any sort of manipulation to blobs after they got extracted
292	  from FIT images like stripping off headers or modifying the size of the
293	  blob, verification, authentication, decryption etc. in a platform or
294	  board specific way. In order to use this feature a platform or board-
295	  specific implementation of board_fit_image_post_process() must be
296	  provided. Also, anything done during this post-processing step would
297	  need to be comprehended in how the images were prepared before being
298	  injected into the FIT creation (i.e. the blobs would have been pre-
299	  processed before being added to the FIT image).
300
301if SPL
302
303config SPL_FIT
304	bool "Support Flattened Image Tree within SPL"
305	depends on SPL
306	select SPL_OF_LIBFDT
307
308config SPL_FIT_PRINT
309	bool "Support FIT printing within SPL"
310	depends on SPL_FIT
311	help
312	  Support printing the content of the fitImage in a verbose manner in SPL.
313
314config SPL_FIT_SIGNATURE
315	bool "Enable signature verification of FIT firmware within SPL"
316	depends on SPL_DM
317	select SPL_FIT
318	select SPL_RSA
319
320config SPL_LOAD_FIT
321	bool "Enable SPL loading U-Boot as a FIT"
322	select SPL_FIT
323	help
324	  Normally with the SPL framework a legacy image is generated as part
325	  of the build. This contains U-Boot along with information as to
326	  where it should be loaded. This option instead enables generation
327	  of a FIT (Flat Image Tree) which provides more flexibility. In
328	  particular it can handle selecting from multiple device tree
329	  and passing the correct one to U-Boot.
330
331config SPL_LOAD_FIT_FULL
332	bool "Enable SPL loading U-Boot as a FIT"
333	select SPL_FIT
334	help
335	  Normally with the SPL framework a legacy image is generated as part
336	  of the build. This contains U-Boot along with information as to
337	  where it should be loaded. This option instead enables generation
338	  of a FIT (Flat Image Tree) which provides more flexibility. In
339	  particular it can handle selecting from multiple device tree
340	  and passing the correct one to U-Boot.
341
342config SPL_FIT_IMAGE_POST_PROCESS
343	bool "Enable post-processing of FIT artifacts after loading by the SPL"
344	depends on SPL_LOAD_FIT
345	help
346	  Allows doing any sort of manipulation to blobs after they got extracted
347	  from the U-Boot FIT image like stripping off headers or modifying the
348	  size of the blob, verification, authentication, decryption etc. in a
349	  platform or board specific way. In order to use this feature a platform
350	  or board-specific implementation of board_fit_image_post_process() must
351	  be provided. Also, anything done during this post-processing step would
352	  need to be comprehended in how the images were prepared before being
353	  injected into the FIT creation (i.e. the blobs would have been pre-
354	  processed before being added to the FIT image).
355
356config SPL_FIT_SOURCE
357	string ".its source file for U-Boot FIT image"
358	depends on SPL_FIT
359	help
360	  Specifies a (platform specific) FIT source file to generate the
361	  U-Boot FIT image. This could specify further image to load and/or
362	  execute.
363
364config SPL_FIT_GENERATOR
365	string ".its file generator script for U-Boot FIT image"
366	depends on SPL_FIT
367	default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
368	help
369	  Specifies a (platform specific) script file to generate the FIT
370	  source file used to build the U-Boot FIT image file. This gets
371	  passed a list of supported device tree file stub names to
372	  include in the generated image.
373
374endif # SPL
375
376endif # FIT
377
378config IMAGE_FORMAT_LEGACY
379	bool "Enable support for the legacy image format"
380	default y if !FIT_SIGNATURE
381	help
382	  This option enables the legacy image format. It is enabled by
383	  default for backward compatibility, unless FIT_SIGNATURE is
384	  set where it is disabled so that unsigned images cannot be
385	  loaded. If a board needs the legacy image format support in this
386	  case, enable it here.
387
388config OF_BOARD_SETUP
389	bool "Set up board-specific details in device tree before boot"
390	depends on OF_LIBFDT
391	help
392	  This causes U-Boot to call ft_board_setup() before booting into
393	  the Operating System. This function can set up various
394	  board-specific information in the device tree for use by the OS.
395	  The device tree is then passed to the OS.
396
397config OF_SYSTEM_SETUP
398	bool "Set up system-specific details in device tree before boot"
399	depends on OF_LIBFDT
400	help
401	  This causes U-Boot to call ft_system_setup() before booting into
402	  the Operating System. This function can set up various
403	  system-specific information in the device tree for use by the OS.
404	  The device tree is then passed to the OS.
405
406config OF_STDOUT_VIA_ALIAS
407	bool "Update the device-tree stdout alias from U-Boot"
408	depends on OF_LIBFDT
409	help
410	  This uses U-Boot's serial alias from the aliases node to update
411	  the device tree passed to the OS. The "linux,stdout-path" property
412	  in the chosen node is set to point to the correct serial node.
413	  This option currently references CONFIG_CONS_INDEX, which is
414	  incorrect when used with device tree as this option does not
415	  exist / should not be used.
416
417config SYS_EXTRA_OPTIONS
418	string "Extra Options (DEPRECATED)"
419	help
420	  The old configuration infrastructure (= mkconfig + boards.cfg)
421	  provided the extra options field. If you have something like
422	  "HAS_BAR,BAZ=64", the optional options
423	    #define CONFIG_HAS
424	    #define CONFIG_BAZ	64
425	  will be defined in include/config.h.
426	  This option was prepared for the smooth migration from the old
427	  configuration to Kconfig. Since this option will be removed sometime,
428	  new boards should not use this option.
429
430config SYS_TEXT_BASE
431	depends on !NIOS2 && !XTENSA
432	depends on !EFI_APP
433	default 0x80800000 if ARCH_OMAP2PLUS
434	default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
435	default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
436	default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
437	hex "Text Base"
438	help
439	  The address in memory that U-Boot will be running from, initially.
440
441
442
443config SYS_CLK_FREQ
444	depends on ARC || ARCH_SUNXI
445	int "CPU clock frequency"
446	help
447	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
448
449config ARCH_FIXUP_FDT_MEMORY
450	bool "Enable arch_fixup_memory_banks() call"
451	default y
452	help
453	  Enable FDT memory map syncup before OS boot. This feature can be
454	  used for booting OS with different memory setup where the part of
455	  the memory location should be used for different purpose.
456
457endmenu		# Boot images
458
459source "api/Kconfig"
460
461source "common/Kconfig"
462
463source "cmd/Kconfig"
464
465source "disk/Kconfig"
466
467source "dts/Kconfig"
468
469source "env/Kconfig"
470
471source "net/Kconfig"
472
473source "drivers/Kconfig"
474
475source "fs/Kconfig"
476
477source "lib/Kconfig"
478
479source "test/Kconfig"
480