# # For a description of the syntax of this configuration file, # see Documentation/kbuild/kconfig-language.txt. # mainmenu "U-Boot $UBOOTVERSION Configuration" config UBOOTVERSION string option env="UBOOTVERSION" # Allow defaults in arch-specific code to override any given here source "arch/Kconfig" menu "General setup" config LOCALVERSION string "Local version - append to U-Boot release" help Append an extra string to the end of your U-Boot version. This will show up on your boot log, for example. The string you set here will be appended after the contents of any files with a filename matching localversion* in your object and source tree, in that order. Your total string can be a maximum of 64 characters. config LOCALVERSION_AUTO bool "Automatically append version information to the version string" default y help This will try to automatically determine if the current tree is a release tree by looking for git tags that belong to the current top of tree revision. A string of the format -gxxxxxxxx will be added to the localversion if a git-based tree is found. The string generated by this will be appended after any matching localversion* files, and after the value set in CONFIG_LOCALVERSION. (The actual string used here is the first eight characters produced by running the command: $ git rev-parse --verify HEAD which is done within the script "scripts/setlocalversion".) config CC_OPTIMIZE_FOR_SIZE bool "Optimize for size" default y help Enabling this option will pass "-Os" instead of "-O2" to gcc resulting in a smaller U-Boot image. This option is enabled by default for U-Boot. config SYS_MALLOC_F bool "Enable malloc() pool before relocation" default y if DM help Before relocation memory is very limited on many platforms. Still, we can provide a small malloc() pool if needed. Driver model in particular needs this to operate, so that it can allocate the initial serial device and any others that are needed. config SYS_MALLOC_F_LEN hex "Size of malloc() pool before relocation" depends on SYS_MALLOC_F default 0x400 help Before relocation memory is very limited on many platforms. Still, we can provide a small malloc() pool if needed. Driver model in particular needs this to operate, so that it can allocate the initial serial device and any others that are needed. menuconfig EXPERT bool "Configure standard U-Boot features (expert users)" default y help This option allows certain base U-Boot options and settings to be disabled or tweaked. This is for specialized environments which can tolerate a "non-standard" U-Boot. Only use this if you really know what you are doing. if EXPERT config SYS_MALLOC_CLEAR_ON_INIT bool "Init with zeros the memory reserved for malloc (slow)" default y help This setting is enabled by default. The reserved malloc memory is initialized with zeros, so first malloc calls will return the pointer to the zeroed memory. But this slows the boot time. It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN value, has more than few MiB, e.g. when uses bzip2 or bmp logo. Then the boot time can be significantly reduced. Warning: When disabling this, please check if malloc calls, maybe should be replaced by calloc - if expects zeroed memory. endif endmenu # General setup menu "Boot images" config SUPPORT_SPL bool config SUPPORT_TPL bool config SPL bool depends on SUPPORT_SPL prompt "Enable SPL" help If you want to build SPL as well as the normal image, say Y. config SPL_STACK_R depends on SPL bool "Enable SDRAM location for SPL stack" help SPL starts off execution in SRAM and thus typically has only a small stack available. Since SPL sets up DRAM while in its board_init_f() function, it is possible for the stack to move there before board_init_r() is reached. This option enables a special SDRAM location for the SPL stack. U-Boot SPL switches to this after board_init_f() completes, and before board_init_r() starts. config SPL_STACK_R_ADDR depends on SPL_STACK_R hex "SDRAM location for SPL stack" help Specify the address in SDRAM for the SPL stack. This will be set up before board_init_r() is called. config TPL bool depends on SPL && SUPPORT_TPL prompt "Enable TPL" help If you want to build TPL as well as the normal image and SPL, say Y. config FIT bool "Support Flattened Image Tree" help This option allows to boot the new uImage structrure, Flattened Image Tree. FIT is formally a FDT, which can include images of various types (kernel, FDT blob, ramdisk, etc.) in a single blob. To boot this new uImage structure, pass the the address of the blob to the "bootm" command. config FIT_VERBOSE bool "Display verbose messages on FIT boot" depends on FIT config FIT_SIGNATURE bool "Enable signature verification of FIT uImages" depends on FIT depends on DM select RSA help This option enables signature verification of FIT uImages, using a hash signed and verified using RSA. If CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive hashing is available using hardware, RSA library will use it. See doc/uImage.FIT/signature.txt for more details. config SYS_EXTRA_OPTIONS string "Extra Options (DEPRECATED)" help The old configuration infrastructure (= mkconfig + boards.cfg) provided the extra options field. If you have something like "HAS_BAR,BAZ=64", the optional options #define CONFIG_HAS #define CONFIG_BAZ 64 will be defined in include/config.h. This option was prepared for the smooth migration from the old configuration to Kconfig. Since this option will be removed sometime, new boards should not use this option. config SYS_TEXT_BASE depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP depends on !EFI_APP hex "Text Base" help TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture config SYS_CLK_FREQ depends on ARC || ARCH_SUNXI int "CPU clock frequency" help TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture endmenu # Boot images source "common/Kconfig" source "dts/Kconfig" source "net/Kconfig" source "drivers/Kconfig" source "fs/Kconfig" source "lib/Kconfig" source "test/Kconfig"