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1#
2# For a description of the syntax of this configuration file,
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3# see the file Documentation/kbuild/kconfig-language.txt in the
4# Linux kernel source tree.
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5#
6mainmenu "U-Boot $UBOOTVERSION Configuration"
7
8config UBOOTVERSION
9 string
10 option env="UBOOTVERSION"
11
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12# Allow defaults in arch-specific code to override any given here
13source "arch/Kconfig"
14
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15menu "General setup"
16
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17config BROKEN
18 bool
19 help
20 This option cannot be enabled. It is used as dependency
21 for broken and incomplete features.
22
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23config LOCALVERSION
24 string "Local version - append to U-Boot release"
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25 help
26 Append an extra string to the end of your U-Boot version.
59d7c34b 27 This will show up in your boot log, for example.
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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"
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35 default y
36 help
37 This will try to automatically determine if the current tree is a
59d7c34b 38 release tree by looking for Git tags that belong to the current
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39 top of tree revision.
40
41 A string of the format -gxxxxxxxx will be added to the localversion
59d7c34b 42 if a Git-based tree is found. The string generated by this will be
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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
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53config CC_OPTIMIZE_FOR_SIZE
54 bool "Optimize for size"
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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
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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
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69config DISTRO_DEFAULTS
70 bool "Select defaults suitable for booting general purpose Linux distributions"
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71 select AUTO_COMPLETE
72 select CMDLINE_EDITING
26959271 73 select CMD_BOOTI if ARM64
58008cba 74 select CMD_BOOTZ if ARM && !ARM64
ba628855 75 select CMD_DHCP if CMD_NET
c4f66832 76 select CMD_ENV_EXISTS
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77 select CMD_EXT2
78 select CMD_EXT4
79 select CMD_FAT
80 select CMD_FS_GENERIC
fa2c1467 81 select CMD_PART if PARTITIONS
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82 select CMD_PING if CMD_NET
83 select CMD_PXE if NET
84 select ENV_VARS_UBOOT_CONFIG
9f823615 85 select HUSH_PARSER
d021e942 86 select SUPPORT_RAW_INITRD
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87 select SYS_LONGHELP
88 imply CMD_MII if NET
4aa74926 89 imply USB_STORAGE
58008cba 90 imply USE_BOOTCOMMAND
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91 help
92 Select this to enable various options and commands which are suitable
93 for building u-boot for booting general purpose Linux distributions.
94
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95config ENV_VARS_UBOOT_CONFIG
96 bool "Add arch, board, vendor and soc variables to default environment"
97 help
98 Define this in order to add variables describing the
99 U-Boot build configuration to the default environment.
100 These will be named arch, cpu, board, vendor, and soc.
101 Enabling this option will cause the following to be defined:
102 - CONFIG_SYS_ARCH
103 - CONFIG_SYS_CPU
104 - CONFIG_SYS_BOARD
105 - CONFIG_SYS_VENDOR
106 - CONFIG_SYS_SOC
107
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108config NR_DRAM_BANKS
109 int "Number of DRAM banks"
110 default 4
111 help
112 This defines the number of DRAM banks.
113
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114config SYS_BOOT_GET_CMDLINE
115 bool "Enable kernel command line setup"
116 help
117 Enables allocating and saving kernel cmdline in space between
118 "bootm_low" and "bootm_low" + BOOTMAPSZ.
119
120config SYS_BOOT_GET_KBD
121 bool "Enable kernel board information setup"
122 help
123 Enables allocating and saving a kernel copy of the bd_info in
124 space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
125
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126config SYS_MALLOC_F
127 bool "Enable malloc() pool before relocation"
326a6823 128 default y if DM
15a5c72c 129
b724bd7d 130 help
59d7c34b 131 Before relocation, memory is very limited on many platforms. Still,
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132 we can provide a small malloc() pool if needed. Driver model in
133 particular needs this to operate, so that it can allocate the
134 initial serial device and any others that are needed.
135
136config SYS_MALLOC_F_LEN
137 hex "Size of malloc() pool before relocation"
138 depends on SYS_MALLOC_F
90e407ae 139 default 0x1000 if AM33XX
15a5c72c 140 default 0x2800 if SANDBOX
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141 default 0x400
142 help
59d7c34b 143 Before relocation, memory is very limited on many platforms. Still,
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144 we can provide a small malloc() pool if needed. Driver model in
145 particular needs this to operate, so that it can allocate the
146 initial serial device and any others that are needed.
147
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148config SYS_MALLOC_LEN
149 hex "Define memory for Dynamic allocation"
ec48b6c9 150 depends on ARCH_ZYNQ || ARCH_VERSAL
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151 help
152 This defines memory to be allocated for Dynamic allocation
153 TODO: Use for other architectures
154
f1896c45 155config SPL_SYS_MALLOC_F_LEN
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156 hex "Size of malloc() pool in SPL before relocation"
157 depends on SYS_MALLOC_F
158 default SYS_MALLOC_F_LEN
159 help
160 Before relocation, memory is very limited on many platforms. Still,
161 we can provide a small malloc() pool if needed. Driver model in
162 particular needs this to operate, so that it can allocate the
163 initial serial device and any others that are needed.
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164
165config TPL_SYS_MALLOC_F_LEN
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166 hex "Size of malloc() pool in TPL before relocation"
167 depends on SYS_MALLOC_F
168 default SYS_MALLOC_F_LEN
169 help
170 Before relocation, memory is very limited on many platforms. Still,
171 we can provide a small malloc() pool if needed. Driver model in
172 particular needs this to operate, so that it can allocate the
173 initial serial device and any others that are needed.
f1896c45 174
1bf0979f 175menuconfig EXPERT
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176 bool "Configure standard U-Boot features (expert users)"
177 default y
178 help
179 This option allows certain base U-Boot options and settings
180 to be disabled or tweaked. This is for specialized
181 environments which can tolerate a "non-standard" U-Boot.
59d7c34b 182 Use this only if you really know what you are doing.
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183
184if EXPERT
185 config SYS_MALLOC_CLEAR_ON_INIT
186 bool "Init with zeros the memory reserved for malloc (slow)"
187 default y
188 help
189 This setting is enabled by default. The reserved malloc
190 memory is initialized with zeros, so first malloc calls
191 will return the pointer to the zeroed memory. But this
192 slows the boot time.
193
194 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
195 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
196 Then the boot time can be significantly reduced.
197 Warning:
198 When disabling this, please check if malloc calls, maybe
59d7c34b 199 should be replaced by calloc - if one expects zeroed memory.
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200
201config TOOLS_DEBUG
202 bool "Enable debug information for tools"
203 help
204 Enable generation of debug information for tools such as mkimage.
205 This can be used for debugging purposes. With debug information
206 it is possible to set breakpoints on particular lines, single-step
207 debug through the source code, etc.
208
266aa86b 209endif # EXPERT
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210
211config PHYS_64BIT
212 bool "64bit physical address support"
213 help
214 Say Y here to support 64bit physical memory address.
215 This can be used not only for 64bit SoCs, but also for
216 large physical address extention on 32bit SoCs.
217
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218config BUILD_ROM
219 bool "Build U-Boot as BIOS replacement"
220 depends on X86
221 help
222 This option allows to build a ROM version of U-Boot.
223 The build process generally requires several binary blobs
224 which are not shipped in the U-Boot source tree.
225 Please, see doc/README.x86 for details.
226
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227endmenu # General setup
228
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229menu "Boot images"
230
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231config ANDROID_BOOT_IMAGE
232 bool "Enable support for Android Boot Images"
233 default y if FASTBOOT
234 help
235 This enables support for booting images which use the Android
236 image format header.
237
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238config FIT
239 bool "Support Flattened Image Tree"
aeb9c53c 240 select MD5
089df18b 241 select SHA1
b6cf4439 242 help
266aa86b 243 This option allows you to boot the new uImage structure,
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244 Flattened Image Tree. FIT is formally a FDT, which can include
245 images of various types (kernel, FDT blob, ramdisk, etc.)
246 in a single blob. To boot this new uImage structure,
1f9ac4a4 247 pass the address of the blob to the "bootm" command.
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248 FIT is very flexible, supporting compression, multiple images,
249 multiple configurations, verification through hashing and also
266aa86b 250 verified boot (secure boot using RSA).
b6cf4439 251
266aa86b 252if FIT
b6cf4439 253
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254config FIT_ENABLE_SHA256_SUPPORT
255 bool "Support SHA256 checksum of FIT image contents"
256 default y
58008cba 257 select SHA256
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258 help
259 Enable this to support SHA256 checksum of FIT image contents. A
260 SHA256 checksum is a 256-bit (32-byte) hash value used to check that
261 the image contents have not been corrupted. SHA256 is recommended
262 for use in secure applications since (as at 2016) there is no known
263 feasible attack that could produce a 'collision' with differing
264 input data. Use this for the highest security. Note that only the
265 SHA256 variant is supported: SHA512 and others are not currently
266 supported in U-Boot.
267
b6cf4439 268config FIT_SIGNATURE
c4beb22f 269 bool "Enable signature verification of FIT uImages"
9009798d 270 depends on DM
535adee8 271 select HASH
58008cba 272 select RSA
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273 help
274 This option enables signature verification of FIT uImages,
94e3c8c4 275 using a hash signed and verified using RSA. If
276 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
266aa86b 277 hashing is available using hardware, then the RSA library will use
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278 it. See doc/uImage.FIT/signature.txt for more details.
279
280 WARNING: When relying on signed FIT images with a required signature
281 check the legacy image format is disabled by default, so that
282 unsigned images cannot be loaded. If a board needs the legacy image
283 format support in this case, enable it using
284 CONFIG_IMAGE_FORMAT_LEGACY.
285
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286config FIT_SIGNATURE_MAX_SIZE
287 hex "Max size of signed FIT structures"
288 depends on FIT_SIGNATURE
289 default 0x10000000
290 help
291 This option sets a max size in bytes for verified FIT uImages.
292 A sane value of 256MB protects corrupted DTB structures from overlapping
293 device memory. Assure this size does not extend past expected storage
294 space.
295
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296config FIT_ENABLE_RSASSA_PSS_SUPPORT
297 bool "Support rsassa-pss signature scheme of FIT image contents"
298 depends on FIT_SIGNATURE
299 default n
300 help
301 Enable this to support the pss padding algorithm as described
302 in the rfc8017 (https://tools.ietf.org/html/rfc8017).
303
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304config FIT_VERBOSE
305 bool "Show verbose messages when FIT images fail"
306 help
307 Generally a system will have valid FIT images so debug messages
308 are a waste of code space. If you are debugging your images then
309 you can enable this option to get more verbose information about
310 failures.
51c14cd1 311
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312config FIT_BEST_MATCH
313 bool "Select the best match for the kernel device tree"
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314 help
315 When no configuration is explicitly selected, default to the
316 one whose fdt's compatibility field best matches that of
317 U-Boot itself. A match is considered "best" if it matches the
318 most specific compatibility entry of U-Boot's fdt's root node.
319 The order of entries in the configuration's fdt is ignored.
320
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321config FIT_IMAGE_POST_PROCESS
322 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
323 depends on TI_SECURE_DEVICE
73223f0e 324 help
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325 Allows doing any sort of manipulation to blobs after they got extracted
326 from FIT images like stripping off headers or modifying the size of the
327 blob, verification, authentication, decryption etc. in a platform or
328 board specific way. In order to use this feature a platform or board-
329 specific implementation of board_fit_image_post_process() must be
330 provided. Also, anything done during this post-processing step would
331 need to be comprehended in how the images were prepared before being
332 injected into the FIT creation (i.e. the blobs would have been pre-
333 processed before being added to the FIT image).
334
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335if SPL
336
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337config SPL_FIT
338 bool "Support Flattened Image Tree within SPL"
339 depends on SPL
85c07a5a 340 select SPL_OF_LIBFDT
266aa86b 341
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342config SPL_FIT_PRINT
343 bool "Support FIT printing within SPL"
344 depends on SPL_FIT
345 help
346 Support printing the content of the fitImage in a verbose manner in SPL.
347
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348config SPL_FIT_SIGNATURE
349 bool "Enable signature verification of FIT firmware within SPL"
266aa86b 350 depends on SPL_DM
85c07a5a 351 select SPL_FIT
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352 select SPL_RSA
353
354config SPL_LOAD_FIT
355 bool "Enable SPL loading U-Boot as a FIT"
85c07a5a 356 select SPL_FIT
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357 help
358 Normally with the SPL framework a legacy image is generated as part
359 of the build. This contains U-Boot along with information as to
360 where it should be loaded. This option instead enables generation
361 of a FIT (Flat Image Tree) which provides more flexibility. In
362 particular it can handle selecting from multiple device tree
363 and passing the correct one to U-Boot.
364
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365config SPL_LOAD_FIT_FULL
366 bool "Enable SPL loading U-Boot as a FIT"
367 select SPL_FIT
368 help
369 Normally with the SPL framework a legacy image is generated as part
370 of the build. This contains U-Boot along with information as to
371 where it should be loaded. This option instead enables generation
372 of a FIT (Flat Image Tree) which provides more flexibility. In
373 particular it can handle selecting from multiple device tree
374 and passing the correct one to U-Boot.
375
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376config SPL_FIT_IMAGE_POST_PROCESS
377 bool "Enable post-processing of FIT artifacts after loading by the SPL"
c12d8b7d 378 depends on SPL_LOAD_FIT
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379 help
380 Allows doing any sort of manipulation to blobs after they got extracted
381 from the U-Boot FIT image like stripping off headers or modifying the
382 size of the blob, verification, authentication, decryption etc. in a
383 platform or board specific way. In order to use this feature a platform
384 or board-specific implementation of board_fit_image_post_process() must
385 be provided. Also, anything done during this post-processing step would
386 need to be comprehended in how the images were prepared before being
387 injected into the FIT creation (i.e. the blobs would have been pre-
388 processed before being added to the FIT image).
389
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390config SPL_FIT_SOURCE
391 string ".its source file for U-Boot FIT image"
392 depends on SPL_FIT
393 help
394 Specifies a (platform specific) FIT source file to generate the
395 U-Boot FIT image. This could specify further image to load and/or
396 execute.
397
398config SPL_FIT_GENERATOR
399 string ".its file generator script for U-Boot FIT image"
400 depends on SPL_FIT
d29adf8e 401 default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
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402 help
403 Specifies a (platform specific) script file to generate the FIT
404 source file used to build the U-Boot FIT image file. This gets
405 passed a list of supported device tree file stub names to
406 include in the generated image.
407
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408endif # SPL
409
266aa86b 410endif # FIT
73223f0e 411
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412config IMAGE_FORMAT_LEGACY
413 bool "Enable support for the legacy image format"
414 default y if !FIT_SIGNATURE
415 help
416 This option enables the legacy image format. It is enabled by
417 default for backward compatibility, unless FIT_SIGNATURE is
418 set where it is disabled so that unsigned images cannot be
419 loaded. If a board needs the legacy image format support in this
420 case, enable it here.
421
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422config OF_BOARD_SETUP
423 bool "Set up board-specific details in device tree before boot"
424 depends on OF_LIBFDT
425 help
426 This causes U-Boot to call ft_board_setup() before booting into
427 the Operating System. This function can set up various
428 board-specific information in the device tree for use by the OS.
429 The device tree is then passed to the OS.
430
431config OF_SYSTEM_SETUP
432 bool "Set up system-specific details in device tree before boot"
433 depends on OF_LIBFDT
434 help
435 This causes U-Boot to call ft_system_setup() before booting into
436 the Operating System. This function can set up various
437 system-specific information in the device tree for use by the OS.
438 The device tree is then passed to the OS.
439
440config OF_STDOUT_VIA_ALIAS
441 bool "Update the device-tree stdout alias from U-Boot"
442 depends on OF_LIBFDT
443 help
444 This uses U-Boot's serial alias from the aliases node to update
445 the device tree passed to the OS. The "linux,stdout-path" property
446 in the chosen node is set to point to the correct serial node.
447 This option currently references CONFIG_CONS_INDEX, which is
448 incorrect when used with device tree as this option does not
449 exist / should not be used.
b6cf4439 450
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451config SYS_EXTRA_OPTIONS
452 string "Extra Options (DEPRECATED)"
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453 help
454 The old configuration infrastructure (= mkconfig + boards.cfg)
ed36323f 455 provided the extra options field. If you have something like
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456 "HAS_BAR,BAZ=64", the optional options
457 #define CONFIG_HAS
458 #define CONFIG_BAZ 64
459 will be defined in include/config.h.
460 This option was prepared for the smooth migration from the old
461 configuration to Kconfig. Since this option will be removed sometime,
462 new boards should not use this option.
463
7f7563ce 464config SYS_TEXT_BASE
278b90ce 465 depends on !NIOS2 && !XTENSA
484cce0d 466 depends on !EFI_APP
586bde93 467 default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
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468 default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
469 default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
470 default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
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471 hex "Text Base"
472 help
278b90ce 473 The address in memory that U-Boot will be running from, initially.
7f7563ce 474
7e0ed13f 475
eba3fbd6 476
33d88183 477config SYS_CLK_FREQ
e71b422b 478 depends on ARC || ARCH_SUNXI
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479 int "CPU clock frequency"
480 help
481 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
482
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483config ARCH_FIXUP_FDT_MEMORY
484 bool "Enable arch_fixup_memory_banks() call"
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485 default y
486 help
487 Enable FDT memory map syncup before OS boot. This feature can be
488 used for booting OS with different memory setup where the part of
489 the memory location should be used for different purpose.
490
e91c3c33 491endmenu # Boot images
51631259 492
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493source "api/Kconfig"
494
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495source "common/Kconfig"
496
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497source "cmd/Kconfig"
498
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499source "disk/Kconfig"
500
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501source "dts/Kconfig"
502
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503source "env/Kconfig"
504
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505source "net/Kconfig"
506
507source "drivers/Kconfig"
508
509source "fs/Kconfig"
510
511source "lib/Kconfig"
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512
513source "test/Kconfig"