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 || TEGRA
59 default y if ARCH_LS2080A
60 default y if ARCH_ROCKCHIP
62 select CMD_BOOTZ if ARM && !ARM64
63 select CMD_BOOTI if ARM64
74 Select this to enable various options and commands which are suitable
75 for building u-boot for booting general purpose Linux distributions.
78 bool "Enable malloc() pool before relocation"
81 Before relocation, memory is very limited on many platforms. Still,
82 we can provide a small malloc() pool if needed. Driver model in
83 particular needs this to operate, so that it can allocate the
84 initial serial device and any others that are needed.
86 config SYS_MALLOC_F_LEN
87 hex "Size of malloc() pool before relocation"
88 depends on SYS_MALLOC_F
91 Before relocation, memory is very limited on many platforms. Still,
92 we can provide a small malloc() pool if needed. Driver model in
93 particular needs this to operate, so that it can allocate the
94 initial serial device and any others that are needed.
97 bool "Configure standard U-Boot features (expert users)"
100 This option allows certain base U-Boot options and settings
101 to be disabled or tweaked. This is for specialized
102 environments which can tolerate a "non-standard" U-Boot.
103 Use this only if you really know what you are doing.
106 config SYS_MALLOC_CLEAR_ON_INIT
107 bool "Init with zeros the memory reserved for malloc (slow)"
110 This setting is enabled by default. The reserved malloc
111 memory is initialized with zeros, so first malloc calls
112 will return the pointer to the zeroed memory. But this
115 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
116 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
117 Then the boot time can be significantly reduced.
119 When disabling this, please check if malloc calls, maybe
120 should be replaced by calloc - if one expects zeroed memory.
123 bool "Enable debug information for tools"
125 Enable generation of debug information for tools such as mkimage.
126 This can be used for debugging purposes. With debug information
127 it is possible to set breakpoints on particular lines, single-step
128 debug through the source code, etc.
133 bool "64bit physical address support"
135 Say Y here to support 64bit physical memory address.
136 This can be used not only for 64bit SoCs, but also for
137 large physical address extention on 32bit SoCs.
139 endmenu # General setup
144 bool "Support Flattened Image Tree"
146 This option allows you to boot the new uImage structure,
147 Flattened Image Tree. FIT is formally a FDT, which can include
148 images of various types (kernel, FDT blob, ramdisk, etc.)
149 in a single blob. To boot this new uImage structure,
150 pass the address of the blob to the "bootm" command.
151 FIT is very flexible, supporting compression, multiple images,
152 multiple configurations, verification through hashing and also
153 verified boot (secure boot using RSA).
158 bool "Enable signature verification of FIT uImages"
162 This option enables signature verification of FIT uImages,
163 using a hash signed and verified using RSA. If
164 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
165 hashing is available using hardware, then the RSA library will use
166 it. See doc/uImage.FIT/signature.txt for more details.
168 WARNING: When relying on signed FIT images with a required signature
169 check the legacy image format is disabled by default, so that
170 unsigned images cannot be loaded. If a board needs the legacy image
171 format support in this case, enable it using
172 CONFIG_IMAGE_FORMAT_LEGACY.
175 bool "Show verbose messages when FIT images fail"
177 Generally a system will have valid FIT images so debug messages
178 are a waste of code space. If you are debugging your images then
179 you can enable this option to get more verbose information about
182 config FIT_BEST_MATCH
183 bool "Select the best match for the kernel device tree"
185 When no configuration is explicitly selected, default to the
186 one whose fdt's compatibility field best matches that of
187 U-Boot itself. A match is considered "best" if it matches the
188 most specific compatibility entry of U-Boot's fdt's root node.
189 The order of entries in the configuration's fdt is ignored.
191 config FIT_IMAGE_POST_PROCESS
192 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
193 depends on TI_SECURE_DEVICE
195 Allows doing any sort of manipulation to blobs after they got extracted
196 from FIT images like stripping off headers or modifying the size of the
197 blob, verification, authentication, decryption etc. in a platform or
198 board specific way. In order to use this feature a platform or board-
199 specific implementation of board_fit_image_post_process() must be
200 provided. Also, anything done during this post-processing step would
201 need to be comprehended in how the images were prepared before being
202 injected into the FIT creation (i.e. the blobs would have been pre-
203 processed before being added to the FIT image).
206 bool "Support Flattened Image Tree within SPL"
209 config SPL_FIT_SIGNATURE
210 bool "Enable signature verification of FIT firmware within SPL"
216 bool "Enable SPL loading U-Boot as a FIT"
218 Normally with the SPL framework a legacy image is generated as part
219 of the build. This contains U-Boot along with information as to
220 where it should be loaded. This option instead enables generation
221 of a FIT (Flat Image Tree) which provides more flexibility. In
222 particular it can handle selecting from multiple device tree
223 and passing the correct one to U-Boot.
225 config SPL_FIT_IMAGE_POST_PROCESS
226 bool "Enable post-processing of FIT artifacts after loading by the SPL"
227 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
229 Allows doing any sort of manipulation to blobs after they got extracted
230 from the U-Boot FIT image like stripping off headers or modifying the
231 size of the blob, verification, authentication, decryption etc. in a
232 platform or board specific way. In order to use this feature a platform
233 or board-specific implementation of board_fit_image_post_process() must
234 be provided. Also, anything done during this post-processing step would
235 need to be comprehended in how the images were prepared before being
236 injected into the FIT creation (i.e. the blobs would have been pre-
237 processed before being added to the FIT image).
241 config OF_BOARD_SETUP
242 bool "Set up board-specific details in device tree before boot"
245 This causes U-Boot to call ft_board_setup() before booting into
246 the Operating System. This function can set up various
247 board-specific information in the device tree for use by the OS.
248 The device tree is then passed to the OS.
250 config OF_SYSTEM_SETUP
251 bool "Set up system-specific details in device tree before boot"
254 This causes U-Boot to call ft_system_setup() before booting into
255 the Operating System. This function can set up various
256 system-specific information in the device tree for use by the OS.
257 The device tree is then passed to the OS.
259 config OF_STDOUT_VIA_ALIAS
260 bool "Update the device-tree stdout alias from U-Boot"
263 This uses U-Boot's serial alias from the aliases node to update
264 the device tree passed to the OS. The "linux,stdout-path" property
265 in the chosen node is set to point to the correct serial node.
266 This option currently references CONFIG_CONS_INDEX, which is
267 incorrect when used with device tree as this option does not
268 exist / should not be used.
270 config SYS_EXTRA_OPTIONS
271 string "Extra Options (DEPRECATED)"
273 The old configuration infrastructure (= mkconfig + boards.cfg)
274 provided the extra options field. If you have something like
275 "HAS_BAR,BAZ=64", the optional options
277 #define CONFIG_BAZ 64
278 will be defined in include/config.h.
279 This option was prepared for the smooth migration from the old
280 configuration to Kconfig. Since this option will be removed sometime,
281 new boards should not use this option.
284 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
285 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS || \
290 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
294 depends on ARC || ARCH_SUNXI
295 int "CPU clock frequency"
297 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
299 config ARCH_FIXUP_FDT_MEMORY
300 bool "Enable arch_fixup_memory_banks() call"
303 Enable FDT memory map syncup before OS boot. This feature can be
304 used for booting OS with different memory setup where the part of
305 the memory location should be used for different purpose.
307 endmenu # Boot images
309 source "common/Kconfig"
317 source "drivers/Kconfig"
323 source "test/Kconfig"