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# 6mainmenu "U-Boot $UBOOTVERSION Configuration" 7 8config UBOOTVERSION 9 string 10 option env="UBOOTVERSION" 11 12# Allow defaults in arch-specific code to override any given here 13source "arch/Kconfig" 14 15menu "General setup" 16 17config BROKEN 18 bool 19 help 20 This option cannot be enabled. It is used as dependency 21 for broken and incomplete features. 22 23config 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 33config 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 53config 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 62config DISTRO_DEFAULTS 63 bool "Select defaults suitable for booting general purpose Linux distributions" 64 default y if ARCH_SUNXI || TEGRA 65 default y if ARCH_LS2080A 66 default y if ARCH_MESON 67 default y if ARCH_ROCKCHIP 68 default n 69 select CMD_BOOTZ if ARM && !ARM64 70 select CMD_BOOTI if ARM64 71 select CMD_DHCP 72 select CMD_PXE 73 select CMD_EXT2 74 select CMD_EXT4 75 select CMD_FAT 76 select CMD_FS_GENERIC 77 select CMD_MII 78 select CMD_PING 79 select CMD_PART 80 select HUSH_PARSER 81 help 82 Select this to enable various options and commands which are suitable 83 for building u-boot for booting general purpose Linux distributions. 84 85config SYS_MALLOC_F 86 bool "Enable malloc() pool before relocation" 87 default y if DM 88 help 89 Before relocation, memory is very limited on many platforms. Still, 90 we can provide a small malloc() pool if needed. Driver model in 91 particular needs this to operate, so that it can allocate the 92 initial serial device and any others that are needed. 93 94config SYS_MALLOC_F_LEN 95 hex "Size of malloc() pool before relocation" 96 depends on SYS_MALLOC_F 97 default 0x400 98 help 99 Before relocation, memory is very limited on many platforms. Still, 100 we can provide a small malloc() pool if needed. Driver model in 101 particular needs this to operate, so that it can allocate the 102 initial serial device and any others that are needed. 103 104config SPL_SYS_MALLOC_F_LEN 105 hex "Size of malloc() pool in SPL before relocation" 106 depends on SYS_MALLOC_F 107 default SYS_MALLOC_F_LEN 108 help 109 Before relocation, memory is very limited on many platforms. Still, 110 we can provide a small malloc() pool if needed. Driver model in 111 particular needs this to operate, so that it can allocate the 112 initial serial device and any others that are needed. 113 114config TPL_SYS_MALLOC_F_LEN 115 hex "Size of malloc() pool in TPL before relocation" 116 depends on SYS_MALLOC_F 117 default SYS_MALLOC_F_LEN 118 help 119 Before relocation, memory is very limited on many platforms. Still, 120 we can provide a small malloc() pool if needed. Driver model in 121 particular needs this to operate, so that it can allocate the 122 initial serial device and any others that are needed. 123 124menuconfig EXPERT 125 bool "Configure standard U-Boot features (expert users)" 126 default y 127 help 128 This option allows certain base U-Boot options and settings 129 to be disabled or tweaked. This is for specialized 130 environments which can tolerate a "non-standard" U-Boot. 131 Use this only if you really know what you are doing. 132 133if EXPERT 134 config SYS_MALLOC_CLEAR_ON_INIT 135 bool "Init with zeros the memory reserved for malloc (slow)" 136 default y if !ARCH_ROCKCHIP 137 help 138 This setting is enabled by default. The reserved malloc 139 memory is initialized with zeros, so first malloc calls 140 will return the pointer to the zeroed memory. But this 141 slows the boot time. 142 143 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN 144 value, has more than few MiB, e.g. when uses bzip2 or bmp logo. 145 Then the boot time can be significantly reduced. 146 Warning: 147 When disabling this, please check if malloc calls, maybe 148 should be replaced by calloc - if one expects zeroed memory. 149 150config TOOLS_DEBUG 151 bool "Enable debug information for tools" 152 help 153 Enable generation of debug information for tools such as mkimage. 154 This can be used for debugging purposes. With debug information 155 it is possible to set breakpoints on particular lines, single-step 156 debug through the source code, etc. 157 158endif # EXPERT 159 160config PHYS_64BIT 161 bool "64bit physical address support" 162 help 163 Say Y here to support 64bit physical memory address. 164 This can be used not only for 64bit SoCs, but also for 165 large physical address extention on 32bit SoCs. 166 167endmenu # General setup 168 169menu "Boot images" 170 171config ANDROID_BOOT_IMAGE 172 bool "Enable support for Android Boot Images" 173 default y if FASTBOOT 174 help 175 This enables support for booting images which use the Android 176 image format header. 177 178config FIT 179 bool "Support Flattened Image Tree" 180 select MD5 181 select SHA1 182 help 183 This option allows you to boot the new uImage structure, 184 Flattened Image Tree. FIT is formally a FDT, which can include 185 images of various types (kernel, FDT blob, ramdisk, etc.) 186 in a single blob. To boot this new uImage structure, 187 pass the address of the blob to the "bootm" command. 188 FIT is very flexible, supporting compression, multiple images, 189 multiple configurations, verification through hashing and also 190 verified boot (secure boot using RSA). 191 192if FIT 193 194config FIT_ENABLE_SHA256_SUPPORT 195 bool "Support SHA256 checksum of FIT image contents" 196 select SHA256 197 default y 198 help 199 Enable this to support SHA256 checksum of FIT image contents. A 200 SHA256 checksum is a 256-bit (32-byte) hash value used to check that 201 the image contents have not been corrupted. SHA256 is recommended 202 for use in secure applications since (as at 2016) there is no known 203 feasible attack that could produce a 'collision' with differing 204 input data. Use this for the highest security. Note that only the 205 SHA256 variant is supported: SHA512 and others are not currently 206 supported in U-Boot. 207 208config FIT_SIGNATURE 209 bool "Enable signature verification of FIT uImages" 210 depends on DM 211 select RSA 212 select CONSOLE_DISABLE_CLI 213 help 214 This option enables signature verification of FIT uImages, 215 using a hash signed and verified using RSA. If 216 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 217 hashing is available using hardware, then the RSA library will use 218 it. See doc/uImage.FIT/signature.txt for more details. 219 220 WARNING: When relying on signed FIT images with a required signature 221 check the legacy image format is disabled by default, so that 222 unsigned images cannot be loaded. If a board needs the legacy image 223 format support in this case, enable it using 224 CONFIG_IMAGE_FORMAT_LEGACY. 225 226config FIT_ROLLBACK_PROTECT 227 bool "Enable rollback-index protection for FIT image" 228 depends on FIT_SIGNATURE 229 help 230 Enable rollback-index protection for FIT image 231 232config FIT_VERBOSE 233 bool "Show verbose messages when FIT images fail" 234 help 235 Generally a system will have valid FIT images so debug messages 236 are a waste of code space. If you are debugging your images then 237 you can enable this option to get more verbose information about 238 failures. 239 240config FIT_BEST_MATCH 241 bool "Select the best match for the kernel device tree" 242 help 243 When no configuration is explicitly selected, default to the 244 one whose fdt's compatibility field best matches that of 245 U-Boot itself. A match is considered "best" if it matches the 246 most specific compatibility entry of U-Boot's fdt's root node. 247 The order of entries in the configuration's fdt is ignored. 248 249config FIT_IMAGE_POST_PROCESS 250 bool "Enable post-processing of FIT artifacts after loading by U-Boot" 251 help 252 Allows doing any sort of manipulation to blobs after they got extracted 253 from FIT images like stripping off headers or modifying the size of the 254 blob, verification, authentication, decryption etc. in a platform or 255 board specific way. In order to use this feature a platform or board- 256 specific implementation of board_fit_image_post_process() must be 257 provided. Also, anything done during this post-processing step would 258 need to be comprehended in how the images were prepared before being 259 injected into the FIT creation (i.e. the blobs would have been pre- 260 processed before being added to the FIT image). 261 262config FIT_HW_CRYPTO 263 bool "Enable hardware crypto for FIT image checksum and rsa verify" 264 depends on DM_CRYPTO 265 help 266 Enable hardware crypto for FIT image checksum and rsa verify. 267 268if SPL 269 270config SPL_FIT 271 bool "Support Flattened Image Tree within SPL" 272 depends on SPL 273 select SPL_OF_LIBFDT 274 275config SPL_FIT_SIGNATURE 276 bool "Enable signature verification of FIT firmware within SPL" 277 depends on SPL_DM 278 select SPL_FIT 279 select SPL_RSA 280 281config SPL_FIT_ROLLBACK_PROTECT 282 bool "Enable SPL rollback-index protection for FIT image" 283 depends on SPL_FIT_SIGNATURE 284 help 285 Enable SPL rollback-index protection for FIT image 286 287config SPL_LOAD_FIT 288 bool "Enable SPL loading U-Boot as a FIT" 289 select SPL_FIT 290 help 291 Normally with the SPL framework a legacy image is generated as part 292 of the build. This contains U-Boot along with information as to 293 where it should be loaded. This option instead enables generation 294 of a FIT (Flat Image Tree) which provides more flexibility. In 295 particular it can handle selecting from multiple device tree 296 and passing the correct one to U-Boot. 297 298config SPL_FIT_IMAGE_POST_PROCESS 299 bool "Enable post-processing of FIT artifacts after loading by the SPL" 300 depends on SPL_LOAD_FIT 301 help 302 Allows doing any sort of manipulation to blobs after they got extracted 303 from the U-Boot FIT image like stripping off headers or modifying the 304 size of the blob, verification, authentication, decryption etc. in a 305 platform or board specific way. In order to use this feature a platform 306 or board-specific implementation of board_fit_image_post_process() must 307 be provided. Also, anything done during this post-processing step would 308 need to be comprehended in how the images were prepared before being 309 injected into the FIT creation (i.e. the blobs would have been pre- 310 processed before being added to the FIT image). 311 312config SPL_FIT_SOURCE 313 string ".its source file for U-Boot FIT image" 314 depends on SPL_FIT 315 help 316 Specifies a (platform specific) FIT source file to generate the 317 U-Boot FIT image. This could specify further image to load and/or 318 execute. 319 320config SPL_FIT_GENERATOR 321 string ".its file generator script for U-Boot FIT image" 322 depends on SPL_FIT 323 default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI 324 help 325 Specifies a (platform specific) script file to generate the FIT 326 source file used to build the U-Boot FIT image file. This gets 327 passed a list of supported device tree file stub names to 328 include in the generated image. 329 330config SPL_FIT_HW_CRYPTO 331 bool "Enable SPL hardware crypto for FIT image checksum and rsa verify" 332 depends on SPL_DM_CRYPTO 333 help 334 Enable SPL hardware crypto for FIT image checksum and rsa verify. 335 336config SPL_FIT_IMAGE_KB 337 int "SPL FIT image size in KiB" 338 depends on SPL_FIT 339 default 2048 340 help 341 SPL FIT image size in KiB, default 2048KB = 1024KB(u-boot) + 1024KB(tee/atf + others). 342 343config SPL_FIT_IMAGE_MULTIPLE 344 int "SPL FIT image multiple number" 345 depends on SPL_FIT 346 default 2 347 help 348 SPL FIT image multiple number. 349 350config SPL_SYS_DCACHE_OFF 351 bool "Disable SPL dcache" 352 default y 353 help 354 Disable SPL dcache. Please make sure CONFIG_SPL_SYS_MALLOC_F_LEN 355 is large enough to malloc TLB and bd_t buffer while enabling dcache. 356 357endif # SPL 358 359endif # FIT 360 361config OF_BOARD_SETUP 362 bool "Set up board-specific details in device tree before boot" 363 depends on OF_LIBFDT 364 help 365 This causes U-Boot to call ft_board_setup() before booting into 366 the Operating System. This function can set up various 367 board-specific information in the device tree for use by the OS. 368 The device tree is then passed to the OS. 369 370config OF_SYSTEM_SETUP 371 bool "Set up system-specific details in device tree before boot" 372 depends on OF_LIBFDT 373 help 374 This causes U-Boot to call ft_system_setup() before booting into 375 the Operating System. This function can set up various 376 system-specific information in the device tree for use by the OS. 377 The device tree is then passed to the OS. 378 379config OF_STDOUT_VIA_ALIAS 380 bool "Update the device-tree stdout alias from U-Boot" 381 depends on OF_LIBFDT 382 help 383 This uses U-Boot's serial alias from the aliases node to update 384 the device tree passed to the OS. The "linux,stdout-path" property 385 in the chosen node is set to point to the correct serial node. 386 This option currently references CONFIG_CONS_INDEX, which is 387 incorrect when used with device tree as this option does not 388 exist / should not be used. 389 390config SYS_EXTRA_OPTIONS 391 string "Extra Options (DEPRECATED)" 392 help 393 The old configuration infrastructure (= mkconfig + boards.cfg) 394 provided the extra options field. If you have something like 395 "HAS_BAR,BAZ=64", the optional options 396 #define CONFIG_HAS 397 #define CONFIG_BAZ 64 398 will be defined in include/config.h. 399 This option was prepared for the smooth migration from the old 400 configuration to Kconfig. Since this option will be removed sometime, 401 new boards should not use this option. 402 403config SYS_TEXT_BASE 404 depends on ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \ 405 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS || \ 406 ARCH_ZYNQ || ARCH_KEYSTONE || ARCH_OMAP2PLUS 407 depends on !EFI_APP 408 hex "Text Base" 409 help 410 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 411 412 default 0x80800000 if ARCH_OMAP2PLUS 413 414 415config SYS_CLK_FREQ 416 depends on ARC || ARCH_SUNXI 417 int "CPU clock frequency" 418 help 419 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 420 421config ARCH_FIXUP_FDT_MEMORY 422 bool "Enable arch_fixup_memory_banks() call" 423 default y 424 help 425 Enable FDT memory map syncup before OS boot. This feature can be 426 used for booting OS with different memory setup where the part of 427 the memory location should be used for different purpose. 428 429endmenu # Boot images 430 431source "api/Kconfig" 432 433source "common/Kconfig" 434 435source "cmd/Kconfig" 436 437source "disk/Kconfig" 438 439source "dts/Kconfig" 440 441source "env/Kconfig" 442 443source "net/Kconfig" 444 445source "drivers/Kconfig" 446 447source "fs/Kconfig" 448 449source "lib/Kconfig" 450 451source "test/Kconfig" 452