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.
6 mainmenu "U-Boot $UBOOTVERSION Configuration"
10 option env="UBOOTVERSION"
12 # Allow defaults in arch-specific code to override any given here
18 string "Local version - append to U-Boot release"
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.
27 config LOCALVERSION_AUTO
28 bool "Automatically append version information to the version string"
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
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.
40 (The actual string used here is the first eight characters produced
41 by running the command:
43 $ git rev-parse --verify HEAD
45 which is done within the script "scripts/setlocalversion".)
47 config CC_OPTIMIZE_FOR_SIZE
48 bool "Optimize for size"
51 Enabling this option will pass "-Os" instead of "-O2" to gcc
52 resulting in a smaller U-Boot image.
54 This option is enabled by default for U-Boot.
56 config DISTRO_DEFAULTS
57 bool "Select defaults suitable for booting general purpose Linux distributions"
58 default y if ARCH_SUNXI
60 select CMD_BOOTZ if ARM && !ARM64
61 select CMD_BOOTI if ARM64
71 Select this to enable various options and commands which are suitable
72 for building u-boot for booting general purpose Linux distributions.
75 bool "Enable malloc() pool before relocation"
78 Before relocation, memory is very limited on many platforms. Still,
79 we can provide a small malloc() pool if needed. Driver model in
80 particular needs this to operate, so that it can allocate the
81 initial serial device and any others that are needed.
83 config SYS_MALLOC_F_LEN
84 hex "Size of malloc() pool before relocation"
85 depends on SYS_MALLOC_F
88 Before relocation, memory is very limited on many platforms. Still,
89 we can provide a small malloc() pool if needed. Driver model in
90 particular needs this to operate, so that it can allocate the
91 initial serial device and any others that are needed.
94 bool "Configure standard U-Boot features (expert users)"
97 This option allows certain base U-Boot options and settings
98 to be disabled or tweaked. This is for specialized
99 environments which can tolerate a "non-standard" U-Boot.
100 Use this only if you really know what you are doing.
103 config SYS_MALLOC_CLEAR_ON_INIT
104 bool "Init with zeros the memory reserved for malloc (slow)"
107 This setting is enabled by default. The reserved malloc
108 memory is initialized with zeros, so first malloc calls
109 will return the pointer to the zeroed memory. But this
112 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
113 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
114 Then the boot time can be significantly reduced.
116 When disabling this, please check if malloc calls, maybe
117 should be replaced by calloc - if one expects zeroed memory.
120 bool "Enable debug information for tools"
122 Enable generation of debug information for tools such as mkimage.
123 This can be used for debugging purposes. With debug information
124 it is possible to set breakpoints on particular lines, single-step
125 debug through the source code, etc.
130 bool "64bit physical address support"
132 Say Y here to support 64bit physical memory address.
133 This can be used not only for 64bit SoCs, but also for
134 large physical address extention on 32bit SoCs.
136 endmenu # General setup
141 bool "Support Flattened Image Tree"
143 This option allows to boot the new uImage structrure,
144 Flattened Image Tree. FIT is formally a FDT, which can include
145 images of various types (kernel, FDT blob, ramdisk, etc.)
146 in a single blob. To boot this new uImage structure,
147 pass the address of the blob to the "bootm" command.
148 FIT is very flexible, supporting compression, multiple images,
149 multiple configurations, verification through hashing and also
150 verified boot (secure boot using RSA). This option enables that
154 bool "Support Flattened Image Tree within SPL"
159 bool "Display verbose messages on FIT boot"
163 bool "Enable signature verification of FIT uImages"
168 This option enables signature verification of FIT uImages,
169 using a hash signed and verified using RSA. If
170 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
171 hashing is available using hardware, then then RSA library will use
172 it. See doc/uImage.FIT/signature.txt for more details.
174 WARNING: When relying on signed FIT images with a required signature
175 check the legacy image format is disabled by default, so that
176 unsigned images cannot be loaded. If a board needs the legacy image
177 format support in this case, enable it using
178 CONFIG_IMAGE_FORMAT_LEGACY.
180 config SPL_FIT_SIGNATURE
181 bool "Enable signature verification of FIT firmware within SPL"
186 config FIT_BEST_MATCH
187 bool "Select the best match for the kernel device tree"
190 When no configuration is explicitly selected, default to the
191 one whose fdt's compatibility field best matches that of
192 U-Boot itself. A match is considered "best" if it matches the
193 most specific compatibility entry of U-Boot's fdt's root node.
194 The order of entries in the configuration's fdt is ignored.
197 bool "Show verbose messages when FIT images fails"
200 Generally a system will have valid FIT images so debug messages
201 are a waste of code space. If you are debugging your images then
202 you can enable this option to get more verbose information about
205 config OF_BOARD_SETUP
206 bool "Set up board-specific details in device tree before boot"
209 This causes U-Boot to call ft_board_setup() before booting into
210 the Operating System. This function can set up various
211 board-specific information in the device tree for use by the OS.
212 The device tree is then passed to the OS.
214 config OF_SYSTEM_SETUP
215 bool "Set up system-specific details in device tree before boot"
218 This causes U-Boot to call ft_system_setup() before booting into
219 the Operating System. This function can set up various
220 system-specific information in the device tree for use by the OS.
221 The device tree is then passed to the OS.
223 config OF_STDOUT_VIA_ALIAS
224 bool "Update the device-tree stdout alias from U-Boot"
227 This uses U-Boot's serial alias from the aliases node to update
228 the device tree passed to the OS. The "linux,stdout-path" property
229 in the chosen node is set to point to the correct serial node.
230 This option currently references CONFIG_CONS_INDEX, which is
231 incorrect when used with device tree as this option does not
232 exist / should not be used.
234 config SYS_EXTRA_OPTIONS
235 string "Extra Options (DEPRECATED)"
237 The old configuration infrastructure (= mkconfig + boards.cfg)
238 provided the extra options field. If you have something like
239 "HAS_BAR,BAZ=64", the optional options
241 #define CONFIG_BAZ 64
242 will be defined in include/config.h.
243 This option was prepared for the smooth migration from the old
244 configuration to Kconfig. Since this option will be removed sometime,
245 new boards should not use this option.
248 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
249 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
253 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
256 bool "Enable SPL loading U-Boot as a FIT"
259 Normally with the SPL framework a legacy image is generated as part
260 of the build. This contains U-Boot along with information as to
261 where it should be loaded. This option instead enables generation
262 of a FIT (Flat Image Tree) which provides more flexibility. In
263 particular it can handle selecting from multiple device tree
264 and passing the correct one to U-Boot.
266 config SPL_FIT_IMAGE_POST_PROCESS
267 bool "Enable post-processing of FIT artifacts after loading by the SPL"
268 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
270 Allows doing any sort of manipulation to blobs after they got extracted
271 from the U-Boot FIT image like stripping off headers or modifying the
272 size of the blob, verification, authentication, decryption etc. in a
273 platform or board specific way. In order to use this feature a platform
274 or board-specific implementation of board_fit_image_post_process() must
275 be provided. Also, anything done during this post-processing step would
276 need to be comprehended in how the images were prepared before being
277 injected into the FIT creation (i.e. the blobs would have been pre-
278 processed before being added to the FIT image).
280 config FIT_IMAGE_POST_PROCESS
281 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
282 depends on FIT && TI_SECURE_DEVICE
284 Allows doing any sort of manipulation to blobs after they got extracted
285 from FIT images like stripping off headers or modifying the size of the
286 blob, verification, authentication, decryption etc. in a platform or
287 board specific way. In order to use this feature a platform or board-
288 specific implementation of board_fit_image_post_process() must be
289 provided. Also, anything done during this post-processing step would
290 need to be comprehended in how the images were prepared before being
291 injected into the FIT creation (i.e. the blobs would have been pre-
292 processed before being added to the FIT image).
295 depends on ARC || ARCH_SUNXI
296 int "CPU clock frequency"
298 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
300 config ARCH_FIXUP_FDT
301 bool "Enable arch_fixup_fdt() call"
302 depends on ARM || MIPS
305 Enable FDT memory map syncup before OS boot. This feature can be
306 used for booting OS with different memory setup where the part of
307 the memory location should be used for different purpose.
309 endmenu # Boot images
311 source "common/Kconfig"
319 source "drivers/Kconfig"
325 source "test/Kconfig"