151631259SMasahiro Yamada# 251631259SMasahiro Yamada# For a description of the syntax of this configuration file, 3*59d7c34bSRobert P. J. Day# see the file Documentation/kbuild/kconfig-language.txt in the 4*59d7c34bSRobert P. J. Day# Linux kernel source tree. 551631259SMasahiro Yamada# 651631259SMasahiro Yamadamainmenu "U-Boot $UBOOTVERSION Configuration" 751631259SMasahiro Yamada 851631259SMasahiro Yamadaconfig UBOOTVERSION 951631259SMasahiro Yamada string 1051631259SMasahiro Yamada option env="UBOOTVERSION" 1151631259SMasahiro Yamada 1266afaef2SSimon Glass# Allow defaults in arch-specific code to override any given here 1366afaef2SSimon Glasssource "arch/Kconfig" 1466afaef2SSimon Glass 1551631259SMasahiro Yamadamenu "General setup" 1651631259SMasahiro Yamada 17e91c3c33SMasahiro Yamadaconfig LOCALVERSION 18e91c3c33SMasahiro Yamada string "Local version - append to U-Boot release" 19e91c3c33SMasahiro Yamada help 20e91c3c33SMasahiro Yamada Append an extra string to the end of your U-Boot version. 21*59d7c34bSRobert P. J. Day This will show up in your boot log, for example. 22e91c3c33SMasahiro Yamada The string you set here will be appended after the contents of 23e91c3c33SMasahiro Yamada any files with a filename matching localversion* in your 24e91c3c33SMasahiro Yamada object and source tree, in that order. Your total string can 25e91c3c33SMasahiro Yamada be a maximum of 64 characters. 26e91c3c33SMasahiro Yamada 27e91c3c33SMasahiro Yamadaconfig LOCALVERSION_AUTO 28e91c3c33SMasahiro Yamada bool "Automatically append version information to the version string" 29e91c3c33SMasahiro Yamada default y 30e91c3c33SMasahiro Yamada help 31e91c3c33SMasahiro Yamada This will try to automatically determine if the current tree is a 32*59d7c34bSRobert P. J. Day release tree by looking for Git tags that belong to the current 33e91c3c33SMasahiro Yamada top of tree revision. 34e91c3c33SMasahiro Yamada 35e91c3c33SMasahiro Yamada A string of the format -gxxxxxxxx will be added to the localversion 36*59d7c34bSRobert P. J. Day if a Git-based tree is found. The string generated by this will be 37e91c3c33SMasahiro Yamada appended after any matching localversion* files, and after the value 38e91c3c33SMasahiro Yamada set in CONFIG_LOCALVERSION. 39e91c3c33SMasahiro Yamada 40e91c3c33SMasahiro Yamada (The actual string used here is the first eight characters produced 41e91c3c33SMasahiro Yamada by running the command: 42e91c3c33SMasahiro Yamada 43e91c3c33SMasahiro Yamada $ git rev-parse --verify HEAD 44e91c3c33SMasahiro Yamada 45e91c3c33SMasahiro Yamada which is done within the script "scripts/setlocalversion".) 46e91c3c33SMasahiro Yamada 474a8ed8e2SMasahiro Yamadaconfig CC_OPTIMIZE_FOR_SIZE 484a8ed8e2SMasahiro Yamada bool "Optimize for size" 494a8ed8e2SMasahiro Yamada default y 504a8ed8e2SMasahiro Yamada help 514a8ed8e2SMasahiro Yamada Enabling this option will pass "-Os" instead of "-O2" to gcc 524a8ed8e2SMasahiro Yamada resulting in a smaller U-Boot image. 534a8ed8e2SMasahiro Yamada 544a8ed8e2SMasahiro Yamada This option is enabled by default for U-Boot. 554a8ed8e2SMasahiro Yamada 56b724bd7dSSimon Glassconfig SYS_MALLOC_F 57b724bd7dSSimon Glass bool "Enable malloc() pool before relocation" 58326a6823SMasahiro Yamada default y if DM 59b724bd7dSSimon Glass help 60*59d7c34bSRobert P. J. Day Before relocation, memory is very limited on many platforms. Still, 61b724bd7dSSimon Glass we can provide a small malloc() pool if needed. Driver model in 62b724bd7dSSimon Glass particular needs this to operate, so that it can allocate the 63b724bd7dSSimon Glass initial serial device and any others that are needed. 64b724bd7dSSimon Glass 65b724bd7dSSimon Glassconfig SYS_MALLOC_F_LEN 66b724bd7dSSimon Glass hex "Size of malloc() pool before relocation" 67b724bd7dSSimon Glass depends on SYS_MALLOC_F 68b724bd7dSSimon Glass default 0x400 69b724bd7dSSimon Glass help 70*59d7c34bSRobert P. J. Day Before relocation, memory is very limited on many platforms. Still, 71b724bd7dSSimon Glass we can provide a small malloc() pool if needed. Driver model in 72b724bd7dSSimon Glass particular needs this to operate, so that it can allocate the 73b724bd7dSSimon Glass initial serial device and any others that are needed. 74b724bd7dSSimon Glass 751bf0979fSTom Rinimenuconfig EXPERT 761bf0979fSTom Rini bool "Configure standard U-Boot features (expert users)" 770aa8a4adSPrzemyslaw Marczak default y 781bf0979fSTom Rini help 791bf0979fSTom Rini This option allows certain base U-Boot options and settings 801bf0979fSTom Rini to be disabled or tweaked. This is for specialized 811bf0979fSTom Rini environments which can tolerate a "non-standard" U-Boot. 82*59d7c34bSRobert P. J. Day Use this only if you really know what you are doing. 831bf0979fSTom Rini 840aa8a4adSPrzemyslaw Marczakif EXPERT 850aa8a4adSPrzemyslaw Marczak config SYS_MALLOC_CLEAR_ON_INIT 860aa8a4adSPrzemyslaw Marczak bool "Init with zeros the memory reserved for malloc (slow)" 870aa8a4adSPrzemyslaw Marczak default y 880aa8a4adSPrzemyslaw Marczak help 890aa8a4adSPrzemyslaw Marczak This setting is enabled by default. The reserved malloc 900aa8a4adSPrzemyslaw Marczak memory is initialized with zeros, so first malloc calls 910aa8a4adSPrzemyslaw Marczak will return the pointer to the zeroed memory. But this 920aa8a4adSPrzemyslaw Marczak slows the boot time. 930aa8a4adSPrzemyslaw Marczak 940aa8a4adSPrzemyslaw Marczak It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN 950aa8a4adSPrzemyslaw Marczak value, has more than few MiB, e.g. when uses bzip2 or bmp logo. 960aa8a4adSPrzemyslaw Marczak Then the boot time can be significantly reduced. 970aa8a4adSPrzemyslaw Marczak Warning: 980aa8a4adSPrzemyslaw Marczak When disabling this, please check if malloc calls, maybe 99*59d7c34bSRobert P. J. Day should be replaced by calloc - if one expects zeroed memory. 1000aa8a4adSPrzemyslaw Marczakendif 10140ad4c4bSMasahiro Yamadaendmenu # General setup 10240ad4c4bSMasahiro Yamada 103e91c3c33SMasahiro Yamadamenu "Boot images" 104e91c3c33SMasahiro Yamada 10502627356SMasahiro Yamadaconfig SUPPORT_SPL 10602627356SMasahiro Yamada bool 10702627356SMasahiro Yamada 108cf6bbe4cSMasahiro Yamadaconfig SUPPORT_TPL 109cf6bbe4cSMasahiro Yamada bool 110cf6bbe4cSMasahiro Yamada 11151631259SMasahiro Yamadaconfig SPL 11251631259SMasahiro Yamada bool 11302627356SMasahiro Yamada depends on SUPPORT_SPL 114d648964fSMasahiro Yamada prompt "Enable SPL" 11551631259SMasahiro Yamada help 11651631259SMasahiro Yamada If you want to build SPL as well as the normal image, say Y. 11751631259SMasahiro Yamada 1181eb0c03cSHans de Goedeconfig SPL_SYS_MALLOC_SIMPLE 1191eb0c03cSHans de Goede bool 1201eb0c03cSHans de Goede depends on SPL 121*59d7c34bSRobert P. J. Day prompt "Only use malloc_simple functions in the SPL" 1221eb0c03cSHans de Goede help 1231eb0c03cSHans de Goede Say Y here to only use the *_simple malloc functions from 124*59d7c34bSRobert P. J. Day malloc_simple.c, rather then using the versions from dlmalloc.c; 1251eb0c03cSHans de Goede this will make the SPL binary smaller at the cost of more heap 1261eb0c03cSHans de Goede usage as the *_simple malloc functions do not re-use free-ed mem. 1271eb0c03cSHans de Goede 128db910353SSimon Glassconfig SPL_STACK_R 129db910353SSimon Glass depends on SPL 130db910353SSimon Glass bool "Enable SDRAM location for SPL stack" 131db910353SSimon Glass help 132db910353SSimon Glass SPL starts off execution in SRAM and thus typically has only a small 133db910353SSimon Glass stack available. Since SPL sets up DRAM while in its board_init_f() 134db910353SSimon Glass function, it is possible for the stack to move there before 135db910353SSimon Glass board_init_r() is reached. This option enables a special SDRAM 136db910353SSimon Glass location for the SPL stack. U-Boot SPL switches to this after 137db910353SSimon Glass board_init_f() completes, and before board_init_r() starts. 138db910353SSimon Glass 139db910353SSimon Glassconfig SPL_STACK_R_ADDR 140db910353SSimon Glass depends on SPL_STACK_R 141db910353SSimon Glass hex "SDRAM location for SPL stack" 142db910353SSimon Glass help 143db910353SSimon Glass Specify the address in SDRAM for the SPL stack. This will be set up 144db910353SSimon Glass before board_init_r() is called. 145db910353SSimon Glass 146dcfcb8d4SHans de Goedeconfig SPL_STACK_R_MALLOC_SIMPLE_LEN 147dcfcb8d4SHans de Goede depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE 148dcfcb8d4SHans de Goede hex "Size of malloc_simple heap after switching to DRAM SPL stack" 149dcfcb8d4SHans de Goede default 0x100000 150dcfcb8d4SHans de Goede help 151dcfcb8d4SHans de Goede Specify the amount of the stack to use as memory pool for 152dcfcb8d4SHans de Goede malloc_simple after switching the stack to DRAM. This may be set 153dcfcb8d4SHans de Goede to give board_init_r() a larger heap then the initial heap in 154dcfcb8d4SHans de Goede SRAM which is limited to SYS_MALLOC_F_LEN bytes. 155dcfcb8d4SHans de Goede 15610172962SSimon Glassconfig SPL_SEPARATE_BSS 15710172962SSimon Glass depends on SPL 15810172962SSimon Glass bool "BSS section is in a different memory region from text" 15910172962SSimon Glass help 16010172962SSimon Glass Some platforms need a large BSS region in SPL and can provide this 16110172962SSimon Glass because RAM is already set up. In this case BSS can be moved to RAM. 16210172962SSimon Glass This option should then be enabled so that the correct device tree 16310172962SSimon Glass location is used. Normally we put the device tree at the end of BSS 16410172962SSimon Glass but with this option enabled, it goes at _image_binary_end. 16510172962SSimon Glass 16651631259SMasahiro Yamadaconfig TPL 16751631259SMasahiro Yamada bool 168cf6bbe4cSMasahiro Yamada depends on SPL && SUPPORT_TPL 169d648964fSMasahiro Yamada prompt "Enable TPL" 17051631259SMasahiro Yamada help 17151631259SMasahiro Yamada If you want to build TPL as well as the normal image and SPL, say Y. 17251631259SMasahiro Yamada 173b6cf4439SMasahiro Yamadaconfig FIT 174b6cf4439SMasahiro Yamada bool "Support Flattened Image Tree" 175b6cf4439SMasahiro Yamada help 176b6cf4439SMasahiro Yamada This option allows to boot the new uImage structrure, 177b6cf4439SMasahiro Yamada Flattened Image Tree. FIT is formally a FDT, which can include 178b6cf4439SMasahiro Yamada images of various types (kernel, FDT blob, ramdisk, etc.) 179b6cf4439SMasahiro Yamada in a single blob. To boot this new uImage structure, 1801f9ac4a4SIgor Grinberg pass the address of the blob to the "bootm" command. 18173223f0eSSimon Glass FIT is very flexible, supporting compression, multiple images, 18273223f0eSSimon Glass multiple configurations, verification through hashing and also 18373223f0eSSimon Glass verified boot (secure boot using RSA). This option enables that 18473223f0eSSimon Glass feature. 185b6cf4439SMasahiro Yamada 186b6cf4439SMasahiro Yamadaconfig FIT_VERBOSE 187b6cf4439SMasahiro Yamada bool "Display verbose messages on FIT boot" 188b6cf4439SMasahiro Yamada depends on FIT 189b6cf4439SMasahiro Yamada 190b6cf4439SMasahiro Yamadaconfig FIT_SIGNATURE 191c4beb22fSRuchika Gupta bool "Enable signature verification of FIT uImages" 192b6cf4439SMasahiro Yamada depends on FIT 1939009798dSChris Kuethe depends on DM 194c4beb22fSRuchika Gupta select RSA 195b6cf4439SMasahiro Yamada help 196b6cf4439SMasahiro Yamada This option enables signature verification of FIT uImages, 19794e3c8c4Sgaurav rana using a hash signed and verified using RSA. If 19894e3c8c4Sgaurav rana CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 19973223f0eSSimon Glass hashing is available using hardware, then then RSA library will use 20073223f0eSSimon Glass it. See doc/uImage.FIT/signature.txt for more details. 20173223f0eSSimon Glass 20273223f0eSSimon Glass WARNING: When relying on signed FIT images with a required signature 20373223f0eSSimon Glass check the legacy image format is disabled by default, so that 20473223f0eSSimon Glass unsigned images cannot be loaded. If a board needs the legacy image 20573223f0eSSimon Glass format support in this case, enable it using 20673223f0eSSimon Glass CONFIG_IMAGE_FORMAT_LEGACY. 20773223f0eSSimon Glass 20873223f0eSSimon Glassconfig FIT_BEST_MATCH 20973223f0eSSimon Glass bool "Select the best match for the kernel device tree" 21073223f0eSSimon Glass depends on FIT 21173223f0eSSimon Glass help 21273223f0eSSimon Glass When no configuration is explicitly selected, default to the 21373223f0eSSimon Glass one whose fdt's compatibility field best matches that of 21473223f0eSSimon Glass U-Boot itself. A match is considered "best" if it matches the 21573223f0eSSimon Glass most specific compatibility entry of U-Boot's fdt's root node. 21673223f0eSSimon Glass The order of entries in the configuration's fdt is ignored. 21773223f0eSSimon Glass 21873223f0eSSimon Glassconfig FIT_VERBOSE 21973223f0eSSimon Glass bool "Show verbose messages when FIT images fails" 22073223f0eSSimon Glass depends on FIT 22173223f0eSSimon Glass help 22273223f0eSSimon Glass Generally a system will have valid FIT images so debug messages 22373223f0eSSimon Glass are a waste of code space. If you are debugging your images then 22473223f0eSSimon Glass you can enable this option to get more verbose information about 22573223f0eSSimon Glass failures. 22673223f0eSSimon Glass 22773223f0eSSimon Glassconfig OF_BOARD_SETUP 22873223f0eSSimon Glass bool "Set up board-specific details in device tree before boot" 22973223f0eSSimon Glass depends on OF_LIBFDT 23073223f0eSSimon Glass help 23173223f0eSSimon Glass This causes U-Boot to call ft_board_setup() before booting into 23273223f0eSSimon Glass the Operating System. This function can set up various 23373223f0eSSimon Glass board-specific information in the device tree for use by the OS. 23473223f0eSSimon Glass The device tree is then passed to the OS. 23573223f0eSSimon Glass 23673223f0eSSimon Glassconfig OF_SYSTEM_SETUP 23773223f0eSSimon Glass bool "Set up system-specific details in device tree before boot" 23873223f0eSSimon Glass depends on OF_LIBFDT 23973223f0eSSimon Glass help 24073223f0eSSimon Glass This causes U-Boot to call ft_system_setup() before booting into 24173223f0eSSimon Glass the Operating System. This function can set up various 24273223f0eSSimon Glass system-specific information in the device tree for use by the OS. 24373223f0eSSimon Glass The device tree is then passed to the OS. 24473223f0eSSimon Glass 24573223f0eSSimon Glassconfig OF_STDOUT_VIA_ALIAS 24673223f0eSSimon Glass bool "Update the device-tree stdout alias from U-Boot" 24773223f0eSSimon Glass depends on OF_LIBFDT 24873223f0eSSimon Glass help 24973223f0eSSimon Glass This uses U-Boot's serial alias from the aliases node to update 25073223f0eSSimon Glass the device tree passed to the OS. The "linux,stdout-path" property 25173223f0eSSimon Glass in the chosen node is set to point to the correct serial node. 25273223f0eSSimon Glass This option currently references CONFIG_CONS_INDEX, which is 25373223f0eSSimon Glass incorrect when used with device tree as this option does not 25473223f0eSSimon Glass exist / should not be used. 255b6cf4439SMasahiro Yamada 25651631259SMasahiro Yamadaconfig SYS_EXTRA_OPTIONS 25751631259SMasahiro Yamada string "Extra Options (DEPRECATED)" 25851631259SMasahiro Yamada help 25951631259SMasahiro Yamada The old configuration infrastructure (= mkconfig + boards.cfg) 260ed36323fSMasahiro Yamada provided the extra options field. If you have something like 26151631259SMasahiro Yamada "HAS_BAR,BAZ=64", the optional options 26251631259SMasahiro Yamada #define CONFIG_HAS 26351631259SMasahiro Yamada #define CONFIG_BAZ 64 26451631259SMasahiro Yamada will be defined in include/config.h. 26551631259SMasahiro Yamada This option was prepared for the smooth migration from the old 26651631259SMasahiro Yamada configuration to Kconfig. Since this option will be removed sometime, 26751631259SMasahiro Yamada new boards should not use this option. 26851631259SMasahiro Yamada 2697f7563ceSMasahiro Yamadaconfig SYS_TEXT_BASE 270c6e18144SMasahiro Yamada depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \ 271b766476dSMasahiro Yamada (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE 272484cce0dSBen Stoltz depends on !EFI_APP 2737f7563ceSMasahiro Yamada hex "Text Base" 2747f7563ceSMasahiro Yamada help 2757f7563ceSMasahiro Yamada TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 2767f7563ceSMasahiro Yamada 277f1dcee59SSimon Glassconfig SPL_LOAD_FIT 278f1dcee59SSimon Glass bool "Enable SPL loading U-Boot as a FIT" 279f1dcee59SSimon Glass depends on FIT 280f1dcee59SSimon Glass help 281f1dcee59SSimon Glass Normally with the SPL framework a legacy image is generated as part 282f1dcee59SSimon Glass of the build. This contains U-Boot along with information as to 283f1dcee59SSimon Glass where it should be loaded. This option instead enables generation 284f1dcee59SSimon Glass of a FIT (Flat Image Tree) which provides more flexibility. In 285f1dcee59SSimon Glass particular it can handle selecting from multiple device tree 286f1dcee59SSimon Glass and passing the correct one to U-Boot. 287f1dcee59SSimon Glass 28833d88183SAlexey Brodkinconfig SYS_CLK_FREQ 289e71b422bSIain Paton depends on ARC || ARCH_SUNXI 29033d88183SAlexey Brodkin int "CPU clock frequency" 29133d88183SAlexey Brodkin help 29233d88183SAlexey Brodkin TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 29333d88183SAlexey Brodkin 294e91c3c33SMasahiro Yamadaendmenu # Boot images 29551631259SMasahiro Yamada 296ed36323fSMasahiro Yamadasource "common/Kconfig" 297ed36323fSMasahiro Yamada 29872a8cf8dSSimon Glasssource "cmd/Kconfig" 29972a8cf8dSSimon Glass 300783e6a72SMasahiro Yamadasource "dts/Kconfig" 301783e6a72SMasahiro Yamada 302ed36323fSMasahiro Yamadasource "net/Kconfig" 303ed36323fSMasahiro Yamada 304ed36323fSMasahiro Yamadasource "drivers/Kconfig" 305ed36323fSMasahiro Yamada 306ed36323fSMasahiro Yamadasource "fs/Kconfig" 307ed36323fSMasahiro Yamada 308ed36323fSMasahiro Yamadasource "lib/Kconfig" 3091967982aSSimon Glass 3101967982aSSimon Glasssource "test/Kconfig" 311