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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 #
6 mainmenu "U-Boot $UBOOTVERSION Configuration"
7
8 config UBOOTVERSION
9 string
10 option env="UBOOTVERSION"
11
12 # Allow defaults in arch-specific code to override any given here
13 source "arch/Kconfig"
14
15 menu "General setup"
16
17 config BROKEN
18 bool
19 help
20 This option cannot be enabled. It is used as dependency
21 for broken and incomplete features.
22
23 config 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
33 config 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
53 config 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
62 config 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
69 config DISTRO_DEFAULTS
70 bool "Select defaults suitable for booting general purpose Linux distributions"
71 select AUTO_COMPLETE
72 select CMDLINE_EDITING
73 select CMD_BOOTI if ARM64
74 select CMD_BOOTZ if ARM && !ARM64
75 select CMD_DHCP if CMD_NET
76 select CMD_ENV_EXISTS
77 select CMD_EXT2
78 select CMD_EXT4
79 select CMD_FAT
80 select CMD_FS_GENERIC
81 select CMD_PART if PARTITIONS
82 select CMD_PING if CMD_NET
83 select CMD_PXE if NET
84 select ENV_VARS_UBOOT_CONFIG
85 select HUSH_PARSER
86 select SUPPORT_RAW_INITRD
87 select SYS_LONGHELP
88 imply CMD_MII if NET
89 imply USB_STORAGE
90 imply USE_BOOTCOMMAND
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
95 config 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
108 config NR_DRAM_BANKS
109 int "Number of DRAM banks"
110 default 4
111 help
112 This defines the number of DRAM banks.
113
114 config 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
120 config 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
126 config SYS_MALLOC_F
127 bool "Enable malloc() pool before relocation"
128 default y if DM
129
130 help
131 Before relocation, memory is very limited on many platforms. Still,
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
136 config SYS_MALLOC_F_LEN
137 hex "Size of malloc() pool before relocation"
138 depends on SYS_MALLOC_F
139 default 0x1000 if AM33XX
140 default 0x2800 if SANDBOX
141 default 0x400
142 help
143 Before relocation, memory is very limited on many platforms. Still,
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
148 config SYS_MALLOC_LEN
149 hex "Define memory for Dynamic allocation"
150 depends on ARCH_ZYNQ || ARCH_VERSAL
151 help
152 This defines memory to be allocated for Dynamic allocation
153 TODO: Use for other architectures
154
155 config SPL_SYS_MALLOC_F_LEN
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.
164
165 config TPL_SYS_MALLOC_F_LEN
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.
174
175 menuconfig EXPERT
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.
182 Use this only if you really know what you are doing.
183
184 if 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
199 should be replaced by calloc - if one expects zeroed memory.
200
201 config 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
209 endif # EXPERT
210
211 config 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 extension on 32bit SoCs.
217
218 config 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
227 config SPL_IMAGE
228 string "SPL image used in the combined SPL+U-Boot image"
229 default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
230 default "spl/u-boot-spl.bin"
231 help
232 Select the SPL build target that shall be generated by the SPL
233 build process (default spl/u-boot-spl.bin). This image will be
234 used to generate a combined image with SPL and main U-Boot
235 proper as one single image.
236
237 config BUILD_TARGET
238 string "Build target special images"
239 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
240 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
241 default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
242 default "u-boot-elf.srec" if RCAR_GEN3
243 default "u-boot.itb" if SPL_LOAD_FIT && ARCH_SUNXI
244 default "u-boot.kwb" if KIRKWOOD
245 default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
246 help
247 Some SoCs need special image types (e.g. U-Boot binary
248 with a special header) as build targets. By defining
249 CONFIG_BUILD_TARGET in the SoC / board header, this
250 special image will be automatically built upon calling
251 make / buildman.
252
253 endmenu # General setup
254
255 menu "Boot images"
256
257 config ANDROID_BOOT_IMAGE
258 bool "Enable support for Android Boot Images"
259 default y if FASTBOOT
260 help
261 This enables support for booting images which use the Android
262 image format header.
263
264 config FIT
265 bool "Support Flattened Image Tree"
266 select MD5
267 select SHA1
268 help
269 This option allows you to boot the new uImage structure,
270 Flattened Image Tree. FIT is formally a FDT, which can include
271 images of various types (kernel, FDT blob, ramdisk, etc.)
272 in a single blob. To boot this new uImage structure,
273 pass the address of the blob to the "bootm" command.
274 FIT is very flexible, supporting compression, multiple images,
275 multiple configurations, verification through hashing and also
276 verified boot (secure boot using RSA).
277
278 if FIT
279
280 config FIT_EXTERNAL_OFFSET
281 hex "Text Base"
282 default 0x0
283 help
284 This specifies a data offset in fit image.
285 The offset is from data payload offset to the beginning of
286 fit image header. When specifies a offset, specific data
287 could be put in the hole between data payload and fit image
288 header, such as CSF data on i.MX platform.
289
290 config FIT_ENABLE_SHA256_SUPPORT
291 bool "Support SHA256 checksum of FIT image contents"
292 default y
293 select SHA256
294 help
295 Enable this to support SHA256 checksum of FIT image contents. A
296 SHA256 checksum is a 256-bit (32-byte) hash value used to check that
297 the image contents have not been corrupted. SHA256 is recommended
298 for use in secure applications since (as at 2016) there is no known
299 feasible attack that could produce a 'collision' with differing
300 input data. Use this for the highest security. Note that only the
301 SHA256 variant is supported: SHA512 and others are not currently
302 supported in U-Boot.
303
304 config FIT_SIGNATURE
305 bool "Enable signature verification of FIT uImages"
306 depends on DM
307 select HASH
308 select RSA
309 help
310 This option enables signature verification of FIT uImages,
311 using a hash signed and verified using RSA. If
312 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
313 hashing is available using hardware, then the RSA library will use
314 it. See doc/uImage.FIT/signature.txt for more details.
315
316 WARNING: When relying on signed FIT images with a required signature
317 check the legacy image format is disabled by default, so that
318 unsigned images cannot be loaded. If a board needs the legacy image
319 format support in this case, enable it using
320 CONFIG_IMAGE_FORMAT_LEGACY.
321
322 config FIT_SIGNATURE_MAX_SIZE
323 hex "Max size of signed FIT structures"
324 depends on FIT_SIGNATURE
325 default 0x10000000
326 help
327 This option sets a max size in bytes for verified FIT uImages.
328 A sane value of 256MB protects corrupted DTB structures from overlapping
329 device memory. Assure this size does not extend past expected storage
330 space.
331
332 config FIT_ENABLE_RSASSA_PSS_SUPPORT
333 bool "Support rsassa-pss signature scheme of FIT image contents"
334 depends on FIT_SIGNATURE
335 default n
336 help
337 Enable this to support the pss padding algorithm as described
338 in the rfc8017 (https://tools.ietf.org/html/rfc8017).
339
340 config FIT_VERBOSE
341 bool "Show verbose messages when FIT images fail"
342 help
343 Generally a system will have valid FIT images so debug messages
344 are a waste of code space. If you are debugging your images then
345 you can enable this option to get more verbose information about
346 failures.
347
348 config FIT_BEST_MATCH
349 bool "Select the best match for the kernel device tree"
350 help
351 When no configuration is explicitly selected, default to the
352 one whose fdt's compatibility field best matches that of
353 U-Boot itself. A match is considered "best" if it matches the
354 most specific compatibility entry of U-Boot's fdt's root node.
355 The order of entries in the configuration's fdt is ignored.
356
357 config FIT_IMAGE_POST_PROCESS
358 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
359 depends on TI_SECURE_DEVICE
360 help
361 Allows doing any sort of manipulation to blobs after they got extracted
362 from FIT images like stripping off headers or modifying the size of the
363 blob, verification, authentication, decryption etc. in a platform or
364 board specific way. In order to use this feature a platform or board-
365 specific implementation of board_fit_image_post_process() must be
366 provided. Also, anything done during this post-processing step would
367 need to be comprehended in how the images were prepared before being
368 injected into the FIT creation (i.e. the blobs would have been pre-
369 processed before being added to the FIT image).
370
371 if SPL
372
373 config SPL_FIT
374 bool "Support Flattened Image Tree within SPL"
375 depends on SPL
376 select SPL_OF_LIBFDT
377
378 config SPL_FIT_PRINT
379 bool "Support FIT printing within SPL"
380 depends on SPL_FIT
381 help
382 Support printing the content of the fitImage in a verbose manner in SPL.
383
384 config SPL_FIT_SIGNATURE
385 bool "Enable signature verification of FIT firmware within SPL"
386 depends on SPL_DM
387 select SPL_FIT
388 select SPL_RSA
389
390 config SPL_LOAD_FIT
391 bool "Enable SPL loading U-Boot as a FIT"
392 select SPL_FIT
393 help
394 Normally with the SPL framework a legacy image is generated as part
395 of the build. This contains U-Boot along with information as to
396 where it should be loaded. This option instead enables generation
397 of a FIT (Flat Image Tree) which provides more flexibility. In
398 particular it can handle selecting from multiple device tree
399 and passing the correct one to U-Boot.
400
401 config SPL_LOAD_FIT_FULL
402 bool "Enable SPL loading U-Boot as a FIT"
403 select SPL_FIT
404 help
405 Normally with the SPL framework a legacy image is generated as part
406 of the build. This contains U-Boot along with information as to
407 where it should be loaded. This option instead enables generation
408 of a FIT (Flat Image Tree) which provides more flexibility. In
409 particular it can handle selecting from multiple device tree
410 and passing the correct one to U-Boot.
411
412 config SPL_FIT_IMAGE_POST_PROCESS
413 bool "Enable post-processing of FIT artifacts after loading by the SPL"
414 depends on SPL_LOAD_FIT
415 help
416 Allows doing any sort of manipulation to blobs after they got extracted
417 from the U-Boot FIT image like stripping off headers or modifying the
418 size of the blob, verification, authentication, decryption etc. in a
419 platform or board specific way. In order to use this feature a platform
420 or board-specific implementation of board_fit_image_post_process() must
421 be provided. Also, anything done during this post-processing step would
422 need to be comprehended in how the images were prepared before being
423 injected into the FIT creation (i.e. the blobs would have been pre-
424 processed before being added to the FIT image).
425
426 config SPL_FIT_SOURCE
427 string ".its source file for U-Boot FIT image"
428 depends on SPL_FIT
429 help
430 Specifies a (platform specific) FIT source file to generate the
431 U-Boot FIT image. This could specify further image to load and/or
432 execute.
433
434 config SPL_FIT_GENERATOR
435 string ".its file generator script for U-Boot FIT image"
436 depends on SPL_FIT
437 default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
438 help
439 Specifies a (platform specific) script file to generate the FIT
440 source file used to build the U-Boot FIT image file. This gets
441 passed a list of supported device tree file stub names to
442 include in the generated image.
443
444 endif # SPL
445
446 endif # FIT
447
448 config IMAGE_FORMAT_LEGACY
449 bool "Enable support for the legacy image format"
450 default y if !FIT_SIGNATURE
451 help
452 This option enables the legacy image format. It is enabled by
453 default for backward compatibility, unless FIT_SIGNATURE is
454 set where it is disabled so that unsigned images cannot be
455 loaded. If a board needs the legacy image format support in this
456 case, enable it here.
457
458 config OF_BOARD_SETUP
459 bool "Set up board-specific details in device tree before boot"
460 depends on OF_LIBFDT
461 help
462 This causes U-Boot to call ft_board_setup() before booting into
463 the Operating System. This function can set up various
464 board-specific information in the device tree for use by the OS.
465 The device tree is then passed to the OS.
466
467 config OF_SYSTEM_SETUP
468 bool "Set up system-specific details in device tree before boot"
469 depends on OF_LIBFDT
470 help
471 This causes U-Boot to call ft_system_setup() before booting into
472 the Operating System. This function can set up various
473 system-specific information in the device tree for use by the OS.
474 The device tree is then passed to the OS.
475
476 config OF_STDOUT_VIA_ALIAS
477 bool "Update the device-tree stdout alias from U-Boot"
478 depends on OF_LIBFDT
479 help
480 This uses U-Boot's serial alias from the aliases node to update
481 the device tree passed to the OS. The "linux,stdout-path" property
482 in the chosen node is set to point to the correct serial node.
483 This option currently references CONFIG_CONS_INDEX, which is
484 incorrect when used with device tree as this option does not
485 exist / should not be used.
486
487 config SYS_EXTRA_OPTIONS
488 string "Extra Options (DEPRECATED)"
489 help
490 The old configuration infrastructure (= mkconfig + boards.cfg)
491 provided the extra options field. If you have something like
492 "HAS_BAR,BAZ=64", the optional options
493 #define CONFIG_HAS
494 #define CONFIG_BAZ 64
495 will be defined in include/config.h.
496 This option was prepared for the smooth migration from the old
497 configuration to Kconfig. Since this option will be removed sometime,
498 new boards should not use this option.
499
500 config SYS_TEXT_BASE
501 depends on !NIOS2 && !XTENSA
502 depends on !EFI_APP
503 default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
504 default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
505 default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
506 default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
507 hex "Text Base"
508 help
509 The address in memory that U-Boot will be running from, initially.
510
511
512
513 config SYS_CLK_FREQ
514 depends on ARC || ARCH_SUNXI
515 int "CPU clock frequency"
516 help
517 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
518
519 config ARCH_FIXUP_FDT_MEMORY
520 bool "Enable arch_fixup_memory_banks() call"
521 default y
522 help
523 Enable FDT memory map syncup before OS boot. This feature can be
524 used for booting OS with different memory setup where the part of
525 the memory location should be used for different purpose.
526
527 endmenu # Boot images
528
529 source "api/Kconfig"
530
531 source "common/Kconfig"
532
533 source "cmd/Kconfig"
534
535 source "disk/Kconfig"
536
537 source "dts/Kconfig"
538
539 source "env/Kconfig"
540
541 source "net/Kconfig"
542
543 source "drivers/Kconfig"
544
545 source "fs/Kconfig"
546
547 source "lib/Kconfig"
548
549 source "test/Kconfig"