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 0x400 87 help 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. 92 93menuconfig EXPERT 94 bool "Configure standard U-Boot features (expert users)" 95 default y 96 help 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. 101 102if EXPERT 103 config SYS_MALLOC_CLEAR_ON_INIT 104 bool "Init with zeros the memory reserved for malloc (slow)" 105 default y 106 help 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 110 slows the boot time. 111 112 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. 115 Warning: 116 When disabling this, please check if malloc calls, maybe 117 should be replaced by calloc - if one expects zeroed memory. 118 119config TOOLS_DEBUG 120 bool "Enable debug information for tools" 121 help 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. 126 127endif 128 129config PHYS_64BIT 130 bool "64bit physical address support" 131 help 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. 135 136endmenu # General setup 137 138menu "Boot images" 139 140config SUPPORT_SPL 141 bool 142 143config SUPPORT_TPL 144 bool 145 146config SPL 147 bool 148 depends on SUPPORT_SPL 149 prompt "Enable SPL" 150 help 151 If you want to build SPL as well as the normal image, say Y. 152 153config SPL_SYS_MALLOC_SIMPLE 154 bool 155 depends on SPL 156 prompt "Only use malloc_simple functions in the SPL" 157 help 158 Say Y here to only use the *_simple malloc functions from 159 malloc_simple.c, rather then using the versions from dlmalloc.c; 160 this will make the SPL binary smaller at the cost of more heap 161 usage as the *_simple malloc functions do not re-use free-ed mem. 162 163config SPL_STACK_R 164 depends on SPL 165 bool "Enable SDRAM location for SPL stack" 166 help 167 SPL starts off execution in SRAM and thus typically has only a small 168 stack available. Since SPL sets up DRAM while in its board_init_f() 169 function, it is possible for the stack to move there before 170 board_init_r() is reached. This option enables a special SDRAM 171 location for the SPL stack. U-Boot SPL switches to this after 172 board_init_f() completes, and before board_init_r() starts. 173 174config SPL_STACK_R_ADDR 175 depends on SPL_STACK_R 176 hex "SDRAM location for SPL stack" 177 help 178 Specify the address in SDRAM for the SPL stack. This will be set up 179 before board_init_r() is called. 180 181config SPL_STACK_R_MALLOC_SIMPLE_LEN 182 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE 183 hex "Size of malloc_simple heap after switching to DRAM SPL stack" 184 default 0x100000 185 help 186 Specify the amount of the stack to use as memory pool for 187 malloc_simple after switching the stack to DRAM. This may be set 188 to give board_init_r() a larger heap then the initial heap in 189 SRAM which is limited to SYS_MALLOC_F_LEN bytes. 190 191config SPL_SEPARATE_BSS 192 depends on SPL 193 bool "BSS section is in a different memory region from text" 194 help 195 Some platforms need a large BSS region in SPL and can provide this 196 because RAM is already set up. In this case BSS can be moved to RAM. 197 This option should then be enabled so that the correct device tree 198 location is used. Normally we put the device tree at the end of BSS 199 but with this option enabled, it goes at _image_binary_end. 200 201config TPL 202 bool 203 depends on SPL && SUPPORT_TPL 204 prompt "Enable TPL" 205 help 206 If you want to build TPL as well as the normal image and SPL, say Y. 207 208config FIT 209 bool "Support Flattened Image Tree" 210 help 211 This option allows to boot the new uImage structrure, 212 Flattened Image Tree. FIT is formally a FDT, which can include 213 images of various types (kernel, FDT blob, ramdisk, etc.) 214 in a single blob. To boot this new uImage structure, 215 pass the address of the blob to the "bootm" command. 216 FIT is very flexible, supporting compression, multiple images, 217 multiple configurations, verification through hashing and also 218 verified boot (secure boot using RSA). This option enables that 219 feature. 220 221config SPL_FIT 222 bool "Support Flattened Image Tree within SPL" 223 depends on FIT 224 depends on SPL 225 226config FIT_VERBOSE 227 bool "Display verbose messages on FIT boot" 228 depends on FIT 229 230config FIT_SIGNATURE 231 bool "Enable signature verification of FIT uImages" 232 depends on FIT 233 depends on DM 234 select RSA 235 help 236 This option enables signature verification of FIT uImages, 237 using a hash signed and verified using RSA. If 238 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 239 hashing is available using hardware, then then RSA library will use 240 it. See doc/uImage.FIT/signature.txt for more details. 241 242 WARNING: When relying on signed FIT images with a required signature 243 check the legacy image format is disabled by default, so that 244 unsigned images cannot be loaded. If a board needs the legacy image 245 format support in this case, enable it using 246 CONFIG_IMAGE_FORMAT_LEGACY. 247 248config SPL_FIT_SIGNATURE 249 bool "Enable signature verification of FIT firmware within SPL" 250 depends on SPL_FIT 251 depends on SPL_DM 252 select SPL_RSA 253 254config FIT_BEST_MATCH 255 bool "Select the best match for the kernel device tree" 256 depends on FIT 257 help 258 When no configuration is explicitly selected, default to the 259 one whose fdt's compatibility field best matches that of 260 U-Boot itself. A match is considered "best" if it matches the 261 most specific compatibility entry of U-Boot's fdt's root node. 262 The order of entries in the configuration's fdt is ignored. 263 264config FIT_VERBOSE 265 bool "Show verbose messages when FIT images fails" 266 depends on FIT 267 help 268 Generally a system will have valid FIT images so debug messages 269 are a waste of code space. If you are debugging your images then 270 you can enable this option to get more verbose information about 271 failures. 272 273config OF_BOARD_SETUP 274 bool "Set up board-specific details in device tree before boot" 275 depends on OF_LIBFDT 276 help 277 This causes U-Boot to call ft_board_setup() before booting into 278 the Operating System. This function can set up various 279 board-specific information in the device tree for use by the OS. 280 The device tree is then passed to the OS. 281 282config OF_SYSTEM_SETUP 283 bool "Set up system-specific details in device tree before boot" 284 depends on OF_LIBFDT 285 help 286 This causes U-Boot to call ft_system_setup() before booting into 287 the Operating System. This function can set up various 288 system-specific information in the device tree for use by the OS. 289 The device tree is then passed to the OS. 290 291config OF_STDOUT_VIA_ALIAS 292 bool "Update the device-tree stdout alias from U-Boot" 293 depends on OF_LIBFDT 294 help 295 This uses U-Boot's serial alias from the aliases node to update 296 the device tree passed to the OS. The "linux,stdout-path" property 297 in the chosen node is set to point to the correct serial node. 298 This option currently references CONFIG_CONS_INDEX, which is 299 incorrect when used with device tree as this option does not 300 exist / should not be used. 301 302config SYS_EXTRA_OPTIONS 303 string "Extra Options (DEPRECATED)" 304 help 305 The old configuration infrastructure (= mkconfig + boards.cfg) 306 provided the extra options field. If you have something like 307 "HAS_BAR,BAZ=64", the optional options 308 #define CONFIG_HAS 309 #define CONFIG_BAZ 64 310 will be defined in include/config.h. 311 This option was prepared for the smooth migration from the old 312 configuration to Kconfig. Since this option will be removed sometime, 313 new boards should not use this option. 314 315config SYS_TEXT_BASE 316 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \ 317 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS 318 depends on !EFI_APP 319 hex "Text Base" 320 help 321 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 322 323config SPL_LOAD_FIT 324 bool "Enable SPL loading U-Boot as a FIT" 325 depends on FIT 326 help 327 Normally with the SPL framework a legacy image is generated as part 328 of the build. This contains U-Boot along with information as to 329 where it should be loaded. This option instead enables generation 330 of a FIT (Flat Image Tree) which provides more flexibility. In 331 particular it can handle selecting from multiple device tree 332 and passing the correct one to U-Boot. 333 334config SPL_FIT_IMAGE_POST_PROCESS 335 bool "Enable post-processing of FIT artifacts after loading by the SPL" 336 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE 337 help 338 Allows doing any sort of manipulation to blobs after they got extracted 339 from the U-Boot FIT image like stripping off headers or modifying the 340 size of the blob, verification, authentication, decryption etc. in a 341 platform or board specific way. In order to use this feature a platform 342 or board-specific implementation of board_fit_image_post_process() must 343 be provided. Also, anything done during this post-processing step would 344 need to be comprehended in how the images were prepared before being 345 injected into the FIT creation (i.e. the blobs would have been pre- 346 processed before being added to the FIT image). 347 348config FIT_IMAGE_POST_PROCESS 349 bool "Enable post-processing of FIT artifacts after loading by U-Boot" 350 depends on FIT && TI_SECURE_DEVICE 351 help 352 Allows doing any sort of manipulation to blobs after they got extracted 353 from FIT images like stripping off headers or modifying the size of the 354 blob, verification, authentication, decryption etc. in a platform or 355 board specific way. In order to use this feature a platform or board- 356 specific implementation of board_fit_image_post_process() must be 357 provided. Also, anything done during this post-processing step would 358 need to be comprehended in how the images were prepared before being 359 injected into the FIT creation (i.e. the blobs would have been pre- 360 processed before being added to the FIT image). 361 362config SYS_CLK_FREQ 363 depends on ARC || ARCH_SUNXI 364 int "CPU clock frequency" 365 help 366 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 367 368config ARCH_FIXUP_FDT 369 bool "Enable arch_fixup_fdt() call" 370 depends on ARM || MIPS 371 default y 372 help 373 Enable FDT memory map syncup before OS boot. This feature can be 374 used for booting OS with different memory setup where the part of 375 the memory location should be used for different purpose. 376 377endmenu # Boot images 378 379source "common/Kconfig" 380 381source "cmd/Kconfig" 382 383source "dts/Kconfig" 384 385source "net/Kconfig" 386 387source "drivers/Kconfig" 388 389source "fs/Kconfig" 390 391source "lib/Kconfig" 392 393source "test/Kconfig" 394