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
70 Select this to enable various options and commands which are suitable
71 for building u-boot for booting general purpose Linux distributions.
74 bool "Enable malloc() pool before relocation"
77 Before relocation, memory is very limited on many platforms. Still,
78 we can provide a small malloc() pool if needed. Driver model in
79 particular needs this to operate, so that it can allocate the
80 initial serial device and any others that are needed.
82 config SYS_MALLOC_F_LEN
83 hex "Size of malloc() pool before relocation"
84 depends on SYS_MALLOC_F
87 Before relocation, memory is very limited on many platforms. Still,
88 we can provide a small malloc() pool if needed. Driver model in
89 particular needs this to operate, so that it can allocate the
90 initial serial device and any others that are needed.
93 bool "Configure standard U-Boot features (expert users)"
96 This option allows certain base U-Boot options and settings
97 to be disabled or tweaked. This is for specialized
98 environments which can tolerate a "non-standard" U-Boot.
99 Use this only if you really know what you are doing.
102 config SYS_MALLOC_CLEAR_ON_INIT
103 bool "Init with zeros the memory reserved for malloc (slow)"
106 This setting is enabled by default. The reserved malloc
107 memory is initialized with zeros, so first malloc calls
108 will return the pointer to the zeroed memory. But this
111 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
112 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
113 Then the boot time can be significantly reduced.
115 When disabling this, please check if malloc calls, maybe
116 should be replaced by calloc - if one expects zeroed memory.
119 bool "Enable debug information for tools"
121 Enable generation of debug information for tools such as mkimage.
122 This can be used for debugging purposes. With debug information
123 it is possible to set breakpoints on particular lines, single-step
124 debug through the source code, etc.
127 endmenu # General setup
139 depends on SUPPORT_SPL
142 If you want to build SPL as well as the normal image, say Y.
144 config SPL_SYS_MALLOC_SIMPLE
147 prompt "Only use malloc_simple functions in the SPL"
149 Say Y here to only use the *_simple malloc functions from
150 malloc_simple.c, rather then using the versions from dlmalloc.c;
151 this will make the SPL binary smaller at the cost of more heap
152 usage as the *_simple malloc functions do not re-use free-ed mem.
156 bool "Enable SDRAM location for SPL stack"
158 SPL starts off execution in SRAM and thus typically has only a small
159 stack available. Since SPL sets up DRAM while in its board_init_f()
160 function, it is possible for the stack to move there before
161 board_init_r() is reached. This option enables a special SDRAM
162 location for the SPL stack. U-Boot SPL switches to this after
163 board_init_f() completes, and before board_init_r() starts.
165 config SPL_STACK_R_ADDR
166 depends on SPL_STACK_R
167 hex "SDRAM location for SPL stack"
169 Specify the address in SDRAM for the SPL stack. This will be set up
170 before board_init_r() is called.
172 config SPL_STACK_R_MALLOC_SIMPLE_LEN
173 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
174 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
177 Specify the amount of the stack to use as memory pool for
178 malloc_simple after switching the stack to DRAM. This may be set
179 to give board_init_r() a larger heap then the initial heap in
180 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
182 config SPL_SEPARATE_BSS
184 bool "BSS section is in a different memory region from text"
186 Some platforms need a large BSS region in SPL and can provide this
187 because RAM is already set up. In this case BSS can be moved to RAM.
188 This option should then be enabled so that the correct device tree
189 location is used. Normally we put the device tree at the end of BSS
190 but with this option enabled, it goes at _image_binary_end.
194 depends on SPL && SUPPORT_TPL
197 If you want to build TPL as well as the normal image and SPL, say Y.
200 bool "Support Flattened Image Tree"
202 This option allows to boot the new uImage structrure,
203 Flattened Image Tree. FIT is formally a FDT, which can include
204 images of various types (kernel, FDT blob, ramdisk, etc.)
205 in a single blob. To boot this new uImage structure,
206 pass the address of the blob to the "bootm" command.
207 FIT is very flexible, supporting compression, multiple images,
208 multiple configurations, verification through hashing and also
209 verified boot (secure boot using RSA). This option enables that
213 bool "Support Flattened Image Tree within SPL"
218 bool "Display verbose messages on FIT boot"
222 bool "Enable signature verification of FIT uImages"
227 This option enables signature verification of FIT uImages,
228 using a hash signed and verified using RSA. If
229 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
230 hashing is available using hardware, then then RSA library will use
231 it. See doc/uImage.FIT/signature.txt for more details.
233 WARNING: When relying on signed FIT images with a required signature
234 check the legacy image format is disabled by default, so that
235 unsigned images cannot be loaded. If a board needs the legacy image
236 format support in this case, enable it using
237 CONFIG_IMAGE_FORMAT_LEGACY.
239 config SPL_FIT_SIGNATURE
240 bool "Enable signature verification of FIT firmware within SPL"
245 config FIT_BEST_MATCH
246 bool "Select the best match for the kernel device tree"
249 When no configuration is explicitly selected, default to the
250 one whose fdt's compatibility field best matches that of
251 U-Boot itself. A match is considered "best" if it matches the
252 most specific compatibility entry of U-Boot's fdt's root node.
253 The order of entries in the configuration's fdt is ignored.
256 bool "Show verbose messages when FIT images fails"
259 Generally a system will have valid FIT images so debug messages
260 are a waste of code space. If you are debugging your images then
261 you can enable this option to get more verbose information about
264 config OF_BOARD_SETUP
265 bool "Set up board-specific details in device tree before boot"
268 This causes U-Boot to call ft_board_setup() before booting into
269 the Operating System. This function can set up various
270 board-specific information in the device tree for use by the OS.
271 The device tree is then passed to the OS.
273 config OF_SYSTEM_SETUP
274 bool "Set up system-specific details in device tree before boot"
277 This causes U-Boot to call ft_system_setup() before booting into
278 the Operating System. This function can set up various
279 system-specific information in the device tree for use by the OS.
280 The device tree is then passed to the OS.
282 config OF_STDOUT_VIA_ALIAS
283 bool "Update the device-tree stdout alias from U-Boot"
286 This uses U-Boot's serial alias from the aliases node to update
287 the device tree passed to the OS. The "linux,stdout-path" property
288 in the chosen node is set to point to the correct serial node.
289 This option currently references CONFIG_CONS_INDEX, which is
290 incorrect when used with device tree as this option does not
291 exist / should not be used.
293 config SYS_EXTRA_OPTIONS
294 string "Extra Options (DEPRECATED)"
296 The old configuration infrastructure (= mkconfig + boards.cfg)
297 provided the extra options field. If you have something like
298 "HAS_BAR,BAZ=64", the optional options
300 #define CONFIG_BAZ 64
301 will be defined in include/config.h.
302 This option was prepared for the smooth migration from the old
303 configuration to Kconfig. Since this option will be removed sometime,
304 new boards should not use this option.
307 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
308 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
312 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
315 bool "Enable SPL loading U-Boot as a FIT"
318 Normally with the SPL framework a legacy image is generated as part
319 of the build. This contains U-Boot along with information as to
320 where it should be loaded. This option instead enables generation
321 of a FIT (Flat Image Tree) which provides more flexibility. In
322 particular it can handle selecting from multiple device tree
323 and passing the correct one to U-Boot.
325 config SPL_FIT_IMAGE_POST_PROCESS
326 bool "Enable post-processing of FIT artifacts after loading by the SPL"
327 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
329 Allows doing any sort of manipulation to blobs after they got extracted
330 from the U-Boot FIT image like stripping off headers or modifying the
331 size of the blob, verification, authentication, decryption etc. in a
332 platform or board specific way. In order to use this feature a platform
333 or board-specific implementation of board_fit_image_post_process() must
334 be provided. Also, anything done during this post-processing step would
335 need to be comprehended in how the images were prepared before being
336 injected into the FIT creation (i.e. the blobs would have been pre-
337 processed before being added to the FIT image).
340 depends on ARC || ARCH_SUNXI
341 int "CPU clock frequency"
343 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
345 endmenu # Boot images
347 source "common/Kconfig"
355 source "drivers/Kconfig"
361 source "test/Kconfig"