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 LOCALVERSION 18 string "Local version - append to U-Boot release" 19 help 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. 26 27config LOCALVERSION_AUTO 28 bool "Automatically append version information to the version string" 29 default y 30 help 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 33 top of tree revision. 34 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. 39 40 (The actual string used here is the first eight characters produced 41 by running the command: 42 43 $ git rev-parse --verify HEAD 44 45 which is done within the script "scripts/setlocalversion".) 46 47config CC_OPTIMIZE_FOR_SIZE 48 bool "Optimize for size" 49 default y 50 help 51 Enabling this option will pass "-Os" instead of "-O2" to gcc 52 resulting in a smaller U-Boot image. 53 54 This option is enabled by default for U-Boot. 55 56config DISTRO_DEFAULTS 57 bool "Select defaults suitable for booting general purpose Linux distributions" 58 default y if ARCH_SUNXI 59 default n 60 select CMD_BOOTZ if ARM && !ARM64 61 select CMD_BOOTI if ARM64 62 select CMD_DHCP 63 select CMD_EXT2 64 select CMD_EXT4 65 select CMD_FAT 66 select CMD_FS_GENERIC 67 select CMD_MII 68 select CMD_PING 69 select HUSH_PARSER 70 help 71 Select this to enable various options and commands which are suitable 72 for building u-boot for booting general purpose Linux distributions. 73 74config SYS_MALLOC_F 75 bool "Enable malloc() pool before relocation" 76 default y if DM 77 help 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. 82 83config SYS_MALLOC_F_LEN 84 hex "Size of malloc() pool before relocation" 85 depends on SYS_MALLOC_F 86 default 0x2000 if SPL_DM && SPL_OF_CONTROL 87 default 0x400 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 94menuconfig EXPERT 95 bool "Configure standard U-Boot features (expert users)" 96 default y 97 help 98 This option allows certain base U-Boot options and settings 99 to be disabled or tweaked. This is for specialized 100 environments which can tolerate a "non-standard" U-Boot. 101 Use this only if you really know what you are doing. 102 103if EXPERT 104 config SYS_MALLOC_CLEAR_ON_INIT 105 bool "Init with zeros the memory reserved for malloc (slow)" 106 default y 107 help 108 This setting is enabled by default. The reserved malloc 109 memory is initialized with zeros, so first malloc calls 110 will return the pointer to the zeroed memory. But this 111 slows the boot time. 112 113 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN 114 value, has more than few MiB, e.g. when uses bzip2 or bmp logo. 115 Then the boot time can be significantly reduced. 116 Warning: 117 When disabling this, please check if malloc calls, maybe 118 should be replaced by calloc - if one expects zeroed memory. 119 120config TOOLS_DEBUG 121 bool "Enable debug information for tools" 122 help 123 Enable generation of debug information for tools such as mkimage. 124 This can be used for debugging purposes. With debug information 125 it is possible to set breakpoints on particular lines, single-step 126 debug through the source code, etc. 127 128endif 129 130config PHYS_64BIT 131 bool "64bit physical address support" 132 help 133 Say Y here to support 64bit physical memory address. 134 This can be used not only for 64bit SoCs, but also for 135 large physical address extention on 32bit SoCs. 136 137endmenu # General setup 138 139menu "Boot images" 140 141config SUPPORT_SPL 142 bool 143 144config SUPPORT_TPL 145 bool 146 147config SPL 148 bool 149 depends on SUPPORT_SPL 150 prompt "Enable SPL" 151 help 152 If you want to build SPL as well as the normal image, say Y. 153 154config SPL_SYS_MALLOC_SIMPLE 155 bool 156 depends on SPL 157 prompt "Only use malloc_simple functions in the SPL" 158 help 159 Say Y here to only use the *_simple malloc functions from 160 malloc_simple.c, rather then using the versions from dlmalloc.c; 161 this will make the SPL binary smaller at the cost of more heap 162 usage as the *_simple malloc functions do not re-use free-ed mem. 163 164config SPL_STACK_R 165 depends on SPL 166 bool "Enable SDRAM location for SPL stack" 167 help 168 SPL starts off execution in SRAM and thus typically has only a small 169 stack available. Since SPL sets up DRAM while in its board_init_f() 170 function, it is possible for the stack to move there before 171 board_init_r() is reached. This option enables a special SDRAM 172 location for the SPL stack. U-Boot SPL switches to this after 173 board_init_f() completes, and before board_init_r() starts. 174 175config SPL_STACK_R_ADDR 176 depends on SPL_STACK_R 177 hex "SDRAM location for SPL stack" 178 help 179 Specify the address in SDRAM for the SPL stack. This will be set up 180 before board_init_r() is called. 181 182config SPL_STACK_R_MALLOC_SIMPLE_LEN 183 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE 184 hex "Size of malloc_simple heap after switching to DRAM SPL stack" 185 default 0x100000 186 help 187 Specify the amount of the stack to use as memory pool for 188 malloc_simple after switching the stack to DRAM. This may be set 189 to give board_init_r() a larger heap then the initial heap in 190 SRAM which is limited to SYS_MALLOC_F_LEN bytes. 191 192config SPL_SEPARATE_BSS 193 depends on SPL 194 bool "BSS section is in a different memory region from text" 195 help 196 Some platforms need a large BSS region in SPL and can provide this 197 because RAM is already set up. In this case BSS can be moved to RAM. 198 This option should then be enabled so that the correct device tree 199 location is used. Normally we put the device tree at the end of BSS 200 but with this option enabled, it goes at _image_binary_end. 201 202config TPL 203 bool 204 depends on SPL && SUPPORT_TPL 205 prompt "Enable TPL" 206 help 207 If you want to build TPL as well as the normal image and SPL, say Y. 208 209config FIT 210 bool "Support Flattened Image Tree" 211 help 212 This option allows to boot the new uImage structrure, 213 Flattened Image Tree. FIT is formally a FDT, which can include 214 images of various types (kernel, FDT blob, ramdisk, etc.) 215 in a single blob. To boot this new uImage structure, 216 pass the address of the blob to the "bootm" command. 217 FIT is very flexible, supporting compression, multiple images, 218 multiple configurations, verification through hashing and also 219 verified boot (secure boot using RSA). This option enables that 220 feature. 221 222config SPL_FIT 223 bool "Support Flattened Image Tree within SPL" 224 depends on FIT 225 depends on SPL 226 227config FIT_VERBOSE 228 bool "Display verbose messages on FIT boot" 229 depends on FIT 230 231config FIT_SIGNATURE 232 bool "Enable signature verification of FIT uImages" 233 depends on FIT 234 depends on DM 235 select RSA 236 help 237 This option enables signature verification of FIT uImages, 238 using a hash signed and verified using RSA. If 239 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 240 hashing is available using hardware, then then RSA library will use 241 it. See doc/uImage.FIT/signature.txt for more details. 242 243 WARNING: When relying on signed FIT images with a required signature 244 check the legacy image format is disabled by default, so that 245 unsigned images cannot be loaded. If a board needs the legacy image 246 format support in this case, enable it using 247 CONFIG_IMAGE_FORMAT_LEGACY. 248 249config SPL_FIT_SIGNATURE 250 bool "Enable signature verification of FIT firmware within SPL" 251 depends on SPL_FIT 252 depends on SPL_DM 253 select SPL_RSA 254 255config FIT_BEST_MATCH 256 bool "Select the best match for the kernel device tree" 257 depends on FIT 258 help 259 When no configuration is explicitly selected, default to the 260 one whose fdt's compatibility field best matches that of 261 U-Boot itself. A match is considered "best" if it matches the 262 most specific compatibility entry of U-Boot's fdt's root node. 263 The order of entries in the configuration's fdt is ignored. 264 265config FIT_VERBOSE 266 bool "Show verbose messages when FIT images fails" 267 depends on FIT 268 help 269 Generally a system will have valid FIT images so debug messages 270 are a waste of code space. If you are debugging your images then 271 you can enable this option to get more verbose information about 272 failures. 273 274config OF_BOARD_SETUP 275 bool "Set up board-specific details in device tree before boot" 276 depends on OF_LIBFDT 277 help 278 This causes U-Boot to call ft_board_setup() before booting into 279 the Operating System. This function can set up various 280 board-specific information in the device tree for use by the OS. 281 The device tree is then passed to the OS. 282 283config OF_SYSTEM_SETUP 284 bool "Set up system-specific details in device tree before boot" 285 depends on OF_LIBFDT 286 help 287 This causes U-Boot to call ft_system_setup() before booting into 288 the Operating System. This function can set up various 289 system-specific information in the device tree for use by the OS. 290 The device tree is then passed to the OS. 291 292config OF_STDOUT_VIA_ALIAS 293 bool "Update the device-tree stdout alias from U-Boot" 294 depends on OF_LIBFDT 295 help 296 This uses U-Boot's serial alias from the aliases node to update 297 the device tree passed to the OS. The "linux,stdout-path" property 298 in the chosen node is set to point to the correct serial node. 299 This option currently references CONFIG_CONS_INDEX, which is 300 incorrect when used with device tree as this option does not 301 exist / should not be used. 302 303config SYS_EXTRA_OPTIONS 304 string "Extra Options (DEPRECATED)" 305 help 306 The old configuration infrastructure (= mkconfig + boards.cfg) 307 provided the extra options field. If you have something like 308 "HAS_BAR,BAZ=64", the optional options 309 #define CONFIG_HAS 310 #define CONFIG_BAZ 64 311 will be defined in include/config.h. 312 This option was prepared for the smooth migration from the old 313 configuration to Kconfig. Since this option will be removed sometime, 314 new boards should not use this option. 315 316config SYS_TEXT_BASE 317 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \ 318 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS 319 depends on !EFI_APP 320 hex "Text Base" 321 help 322 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 323 324config SPL_LOAD_FIT 325 bool "Enable SPL loading U-Boot as a FIT" 326 depends on FIT 327 help 328 Normally with the SPL framework a legacy image is generated as part 329 of the build. This contains U-Boot along with information as to 330 where it should be loaded. This option instead enables generation 331 of a FIT (Flat Image Tree) which provides more flexibility. In 332 particular it can handle selecting from multiple device tree 333 and passing the correct one to U-Boot. 334 335config SPL_FIT_IMAGE_POST_PROCESS 336 bool "Enable post-processing of FIT artifacts after loading by the SPL" 337 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE 338 help 339 Allows doing any sort of manipulation to blobs after they got extracted 340 from the U-Boot FIT image like stripping off headers or modifying the 341 size of the blob, verification, authentication, decryption etc. in a 342 platform or board specific way. In order to use this feature a platform 343 or board-specific implementation of board_fit_image_post_process() must 344 be provided. Also, anything done during this post-processing step would 345 need to be comprehended in how the images were prepared before being 346 injected into the FIT creation (i.e. the blobs would have been pre- 347 processed before being added to the FIT image). 348 349config FIT_IMAGE_POST_PROCESS 350 bool "Enable post-processing of FIT artifacts after loading by U-Boot" 351 depends on FIT && TI_SECURE_DEVICE 352 help 353 Allows doing any sort of manipulation to blobs after they got extracted 354 from FIT images like stripping off headers or modifying the size of the 355 blob, verification, authentication, decryption etc. in a platform or 356 board specific way. In order to use this feature a platform or board- 357 specific implementation of board_fit_image_post_process() must be 358 provided. Also, anything done during this post-processing step would 359 need to be comprehended in how the images were prepared before being 360 injected into the FIT creation (i.e. the blobs would have been pre- 361 processed before being added to the FIT image). 362 363config SYS_CLK_FREQ 364 depends on ARC || ARCH_SUNXI 365 int "CPU clock frequency" 366 help 367 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 368 369config ARCH_FIXUP_FDT 370 bool "Enable arch_fixup_fdt() call" 371 depends on ARM || MIPS 372 default y 373 help 374 Enable FDT memory map syncup before OS boot. This feature can be 375 used for booting OS with different memory setup where the part of 376 the memory location should be used for different purpose. 377 378endmenu # Boot images 379 380source "common/Kconfig" 381 382source "cmd/Kconfig" 383 384source "dts/Kconfig" 385 386source "net/Kconfig" 387 388source "drivers/Kconfig" 389 390source "fs/Kconfig" 391 392source "lib/Kconfig" 393 394source "test/Kconfig" 395