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 61 select CMD_DHCP 62 select CMD_EXT2 63 select CMD_EXT4 64 select CMD_FAT 65 select CMD_FS_GENERIC 66 select CMD_MII 67 select CMD_PING 68 select HUSH_PARSER 69 help 70 Select this to enable various options and commands which are suitable 71 for building u-boot for booting general purpose Linux distributions. 72 73config SYS_MALLOC_F 74 bool "Enable malloc() pool before relocation" 75 default y if DM 76 help 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. 81 82config SYS_MALLOC_F_LEN 83 hex "Size of malloc() pool before relocation" 84 depends on SYS_MALLOC_F 85 default 0x400 86 help 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. 91 92menuconfig EXPERT 93 bool "Configure standard U-Boot features (expert users)" 94 default y 95 help 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. 100 101if EXPERT 102 config SYS_MALLOC_CLEAR_ON_INIT 103 bool "Init with zeros the memory reserved for malloc (slow)" 104 default y 105 help 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 109 slows the boot time. 110 111 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. 114 Warning: 115 When disabling this, please check if malloc calls, maybe 116 should be replaced by calloc - if one expects zeroed memory. 117 118config TOOLS_DEBUG 119 bool "Enable debug information for tools" 120 help 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. 125 126endif 127 128config PHYS_64BIT 129 bool "64bit physical address support" 130 help 131 Say Y here to support 64bit physical memory address. 132 This can be used not only for 64bit SoCs, but also for 133 large physical address extention on 32bit SoCs. 134 135endmenu # General setup 136 137menu "Boot images" 138 139config SUPPORT_SPL 140 bool 141 142config SUPPORT_TPL 143 bool 144 145config SPL 146 bool 147 depends on SUPPORT_SPL 148 prompt "Enable SPL" 149 help 150 If you want to build SPL as well as the normal image, say Y. 151 152config SPL_SYS_MALLOC_SIMPLE 153 bool 154 depends on SPL 155 prompt "Only use malloc_simple functions in the SPL" 156 help 157 Say Y here to only use the *_simple malloc functions from 158 malloc_simple.c, rather then using the versions from dlmalloc.c; 159 this will make the SPL binary smaller at the cost of more heap 160 usage as the *_simple malloc functions do not re-use free-ed mem. 161 162config SPL_STACK_R 163 depends on SPL 164 bool "Enable SDRAM location for SPL stack" 165 help 166 SPL starts off execution in SRAM and thus typically has only a small 167 stack available. Since SPL sets up DRAM while in its board_init_f() 168 function, it is possible for the stack to move there before 169 board_init_r() is reached. This option enables a special SDRAM 170 location for the SPL stack. U-Boot SPL switches to this after 171 board_init_f() completes, and before board_init_r() starts. 172 173config SPL_STACK_R_ADDR 174 depends on SPL_STACK_R 175 hex "SDRAM location for SPL stack" 176 help 177 Specify the address in SDRAM for the SPL stack. This will be set up 178 before board_init_r() is called. 179 180config SPL_STACK_R_MALLOC_SIMPLE_LEN 181 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE 182 hex "Size of malloc_simple heap after switching to DRAM SPL stack" 183 default 0x100000 184 help 185 Specify the amount of the stack to use as memory pool for 186 malloc_simple after switching the stack to DRAM. This may be set 187 to give board_init_r() a larger heap then the initial heap in 188 SRAM which is limited to SYS_MALLOC_F_LEN bytes. 189 190config SPL_SEPARATE_BSS 191 depends on SPL 192 bool "BSS section is in a different memory region from text" 193 help 194 Some platforms need a large BSS region in SPL and can provide this 195 because RAM is already set up. In this case BSS can be moved to RAM. 196 This option should then be enabled so that the correct device tree 197 location is used. Normally we put the device tree at the end of BSS 198 but with this option enabled, it goes at _image_binary_end. 199 200config TPL 201 bool 202 depends on SPL && SUPPORT_TPL 203 prompt "Enable TPL" 204 help 205 If you want to build TPL as well as the normal image and SPL, say Y. 206 207config FIT 208 bool "Support Flattened Image Tree" 209 help 210 This option allows to boot the new uImage structrure, 211 Flattened Image Tree. FIT is formally a FDT, which can include 212 images of various types (kernel, FDT blob, ramdisk, etc.) 213 in a single blob. To boot this new uImage structure, 214 pass the address of the blob to the "bootm" command. 215 FIT is very flexible, supporting compression, multiple images, 216 multiple configurations, verification through hashing and also 217 verified boot (secure boot using RSA). This option enables that 218 feature. 219 220config SPL_FIT 221 bool "Support Flattened Image Tree within SPL" 222 depends on FIT 223 depends on SPL 224 225config FIT_VERBOSE 226 bool "Display verbose messages on FIT boot" 227 depends on FIT 228 229config FIT_SIGNATURE 230 bool "Enable signature verification of FIT uImages" 231 depends on FIT 232 depends on DM 233 select RSA 234 help 235 This option enables signature verification of FIT uImages, 236 using a hash signed and verified using RSA. If 237 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 238 hashing is available using hardware, then then RSA library will use 239 it. See doc/uImage.FIT/signature.txt for more details. 240 241 WARNING: When relying on signed FIT images with a required signature 242 check the legacy image format is disabled by default, so that 243 unsigned images cannot be loaded. If a board needs the legacy image 244 format support in this case, enable it using 245 CONFIG_IMAGE_FORMAT_LEGACY. 246 247config SPL_FIT_SIGNATURE 248 bool "Enable signature verification of FIT firmware within SPL" 249 depends on SPL_FIT 250 depends on SPL_DM 251 select SPL_RSA 252 253config FIT_BEST_MATCH 254 bool "Select the best match for the kernel device tree" 255 depends on FIT 256 help 257 When no configuration is explicitly selected, default to the 258 one whose fdt's compatibility field best matches that of 259 U-Boot itself. A match is considered "best" if it matches the 260 most specific compatibility entry of U-Boot's fdt's root node. 261 The order of entries in the configuration's fdt is ignored. 262 263config FIT_VERBOSE 264 bool "Show verbose messages when FIT images fails" 265 depends on FIT 266 help 267 Generally a system will have valid FIT images so debug messages 268 are a waste of code space. If you are debugging your images then 269 you can enable this option to get more verbose information about 270 failures. 271 272config OF_BOARD_SETUP 273 bool "Set up board-specific details in device tree before boot" 274 depends on OF_LIBFDT 275 help 276 This causes U-Boot to call ft_board_setup() before booting into 277 the Operating System. This function can set up various 278 board-specific information in the device tree for use by the OS. 279 The device tree is then passed to the OS. 280 281config OF_SYSTEM_SETUP 282 bool "Set up system-specific details in device tree before boot" 283 depends on OF_LIBFDT 284 help 285 This causes U-Boot to call ft_system_setup() before booting into 286 the Operating System. This function can set up various 287 system-specific information in the device tree for use by the OS. 288 The device tree is then passed to the OS. 289 290config OF_STDOUT_VIA_ALIAS 291 bool "Update the device-tree stdout alias from U-Boot" 292 depends on OF_LIBFDT 293 help 294 This uses U-Boot's serial alias from the aliases node to update 295 the device tree passed to the OS. The "linux,stdout-path" property 296 in the chosen node is set to point to the correct serial node. 297 This option currently references CONFIG_CONS_INDEX, which is 298 incorrect when used with device tree as this option does not 299 exist / should not be used. 300 301config SYS_EXTRA_OPTIONS 302 string "Extra Options (DEPRECATED)" 303 help 304 The old configuration infrastructure (= mkconfig + boards.cfg) 305 provided the extra options field. If you have something like 306 "HAS_BAR,BAZ=64", the optional options 307 #define CONFIG_HAS 308 #define CONFIG_BAZ 64 309 will be defined in include/config.h. 310 This option was prepared for the smooth migration from the old 311 configuration to Kconfig. Since this option will be removed sometime, 312 new boards should not use this option. 313 314config SYS_TEXT_BASE 315 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \ 316 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS 317 depends on !EFI_APP 318 hex "Text Base" 319 help 320 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 321 322config SPL_LOAD_FIT 323 bool "Enable SPL loading U-Boot as a FIT" 324 depends on FIT 325 help 326 Normally with the SPL framework a legacy image is generated as part 327 of the build. This contains U-Boot along with information as to 328 where it should be loaded. This option instead enables generation 329 of a FIT (Flat Image Tree) which provides more flexibility. In 330 particular it can handle selecting from multiple device tree 331 and passing the correct one to U-Boot. 332 333config SPL_FIT_IMAGE_POST_PROCESS 334 bool "Enable post-processing of FIT artifacts after loading by the SPL" 335 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE 336 help 337 Allows doing any sort of manipulation to blobs after they got extracted 338 from the U-Boot FIT image like stripping off headers or modifying the 339 size of the blob, verification, authentication, decryption etc. in a 340 platform or board specific way. In order to use this feature a platform 341 or board-specific implementation of board_fit_image_post_process() must 342 be provided. Also, anything done during this post-processing step would 343 need to be comprehended in how the images were prepared before being 344 injected into the FIT creation (i.e. the blobs would have been pre- 345 processed before being added to the FIT image). 346 347config SYS_CLK_FREQ 348 depends on ARC || ARCH_SUNXI 349 int "CPU clock frequency" 350 help 351 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 352 353config ARCH_FIXUP_FDT 354 bool "Enable arch_fixup_fdt() call" 355 depends on ARM || MIPS 356 default y 357 help 358 Enable FDT memory map syncup before OS boot. This feature can be 359 used for booting OS with different memory setup where the part of 360 the memory location should be used for different purpose. 361 362endmenu # Boot images 363 364source "common/Kconfig" 365 366source "cmd/Kconfig" 367 368source "dts/Kconfig" 369 370source "net/Kconfig" 371 372source "drivers/Kconfig" 373 374source "fs/Kconfig" 375 376source "lib/Kconfig" 377 378source "test/Kconfig" 379