Kconfig

   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 #
   6 mainmenu "U-Boot $UBOOTVERSION Configuration"
   7
   8 config UBOOTVERSION
   9         string
  10         option env="UBOOTVERSION"
  11
  12 # Allow defaults in arch-specific code to override any given here
  13 source "arch/Kconfig"
  14
  15 menu "General setup"
  16
  17 config 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
  27 config 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
  47 config 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
  56 config DISTRO_DEFAULTS
  57         bool "Select defaults suitable for booting general purpose Linux distributions"
  58         default y if ARCH_SUNXI || TEGRA
  59         default y if ARCH_LS2080A
  60         default n
  61         select CMD_BOOTZ if ARM && !ARM64
  62         select CMD_BOOTI if ARM64
  63         select CMD_DHCP
  64         select CMD_PXE
  65         select CMD_EXT2
  66         select CMD_EXT4
  67         select CMD_FAT
  68         select CMD_FS_GENERIC
  69         select CMD_MII
  70         select CMD_PING
  71         select HUSH_PARSER
  72         help
  73           Select this to enable various options and commands which are suitable
  74           for building u-boot for booting general purpose Linux distributions.
  75
  76 config SYS_MALLOC_F
  77         bool "Enable malloc() pool before relocation"
  78         default y if DM
  79         help
  80           Before relocation, memory is very limited on many platforms. Still,
  81           we can provide a small malloc() pool if needed. Driver model in
  82           particular needs this to operate, so that it can allocate the
  83           initial serial device and any others that are needed.
  84
  85 config SYS_MALLOC_F_LEN
  86         hex "Size of malloc() pool before relocation"
  87         depends on SYS_MALLOC_F
  88         default 0x400
  89         help
  90           Before relocation, memory is very limited on many platforms. Still,
  91           we can provide a small malloc() pool if needed. Driver model in
  92           particular needs this to operate, so that it can allocate the
  93           initial serial device and any others that are needed.
  94
  95 menuconfig EXPERT
  96         bool "Configure standard U-Boot features (expert users)"
  97         default y
  98         help
  99           This option allows certain base U-Boot options and settings
 100           to be disabled or tweaked. This is for specialized
 101           environments which can tolerate a "non-standard" U-Boot.
 102           Use this only if you really know what you are doing.
 103
 104 if EXPERT
 105         config SYS_MALLOC_CLEAR_ON_INIT
 106         bool "Init with zeros the memory reserved for malloc (slow)"
 107         default y
 108         help
 109           This setting is enabled by default. The reserved malloc
 110           memory is initialized with zeros, so first malloc calls
 111           will return the pointer to the zeroed memory. But this
 112           slows the boot time.
 113
 114           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 115           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 116           Then the boot time can be significantly reduced.
 117           Warning:
 118           When disabling this, please check if malloc calls, maybe
 119           should be replaced by calloc - if one expects zeroed memory.
 120
 121 config TOOLS_DEBUG
 122         bool "Enable debug information for tools"
 123         help
 124           Enable generation of debug information for tools such as mkimage.
 125           This can be used for debugging purposes. With debug information
 126           it is possible to set breakpoints on particular lines, single-step
 127           debug through the source code, etc.
 128
 129 endif
 130
 131 config PHYS_64BIT
 132         bool "64bit physical address support"
 133         help
 134           Say Y here to support 64bit physical memory address.
 135           This can be used not only for 64bit SoCs, but also for
 136           large physical address extention on 32bit SoCs.
 137
 138 endmenu         # General setup
 139
 140 menu "Boot images"
 141
 142 config FIT
 143         bool "Support Flattened Image Tree"
 144         help
 145           This option allows to boot the new uImage structrure,
 146           Flattened Image Tree.  FIT is formally a FDT, which can include
 147           images of various types (kernel, FDT blob, ramdisk, etc.)
 148           in a single blob.  To boot this new uImage structure,
 149           pass the address of the blob to the "bootm" command.
 150           FIT is very flexible, supporting compression, multiple images,
 151           multiple configurations, verification through hashing and also
 152           verified boot (secure boot using RSA). This option enables that
 153           feature.
 154
 155 config SPL_FIT
 156         bool "Support Flattened Image Tree within SPL"
 157         depends on FIT
 158         depends on SPL
 159
 160 config FIT_VERBOSE
 161         bool "Display verbose messages on FIT boot"
 162         depends on FIT
 163
 164 config FIT_SIGNATURE
 165         bool "Enable signature verification of FIT uImages"
 166         depends on FIT
 167         depends on DM
 168         select RSA
 169         help
 170           This option enables signature verification of FIT uImages,
 171           using a hash signed and verified using RSA. If
 172           CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 173           hashing is available using hardware, then then RSA library will use
 174           it. See doc/uImage.FIT/signature.txt for more details.
 175
 176           WARNING: When relying on signed FIT images with a required signature
 177           check the legacy image format is disabled by default, so that
 178           unsigned images cannot be loaded. If a board needs the legacy image
 179           format support in this case, enable it using
 180           CONFIG_IMAGE_FORMAT_LEGACY.
 181
 182 config SPL_FIT_SIGNATURE
 183         bool "Enable signature verification of FIT firmware within SPL"
 184         depends on SPL_FIT
 185         depends on SPL_DM
 186         select SPL_RSA
 187
 188 config FIT_BEST_MATCH
 189         bool "Select the best match for the kernel device tree"
 190         depends on FIT
 191         help
 192           When no configuration is explicitly selected, default to the
 193           one whose fdt's compatibility field best matches that of
 194           U-Boot itself. A match is considered "best" if it matches the
 195           most specific compatibility entry of U-Boot's fdt's root node.
 196           The order of entries in the configuration's fdt is ignored.
 197
 198 config FIT_VERBOSE
 199         bool "Show verbose messages when FIT images fails"
 200         depends on FIT
 201         help
 202           Generally a system will have valid FIT images so debug messages
 203           are a waste of code space. If you are debugging your images then
 204           you can enable this option to get more verbose information about
 205           failures.
 206
 207 config OF_BOARD_SETUP
 208         bool "Set up board-specific details in device tree before boot"
 209         depends on OF_LIBFDT
 210         help
 211           This causes U-Boot to call ft_board_setup() before booting into
 212           the Operating System. This function can set up various
 213           board-specific information in the device tree for use by the OS.
 214           The device tree is then passed to the OS.
 215
 216 config OF_SYSTEM_SETUP
 217         bool "Set up system-specific details in device tree before boot"
 218         depends on OF_LIBFDT
 219         help
 220           This causes U-Boot to call ft_system_setup() before booting into
 221           the Operating System. This function can set up various
 222           system-specific information in the device tree for use by the OS.
 223           The device tree is then passed to the OS.
 224
 225 config OF_STDOUT_VIA_ALIAS
 226         bool "Update the device-tree stdout alias from U-Boot"
 227         depends on OF_LIBFDT
 228         help
 229           This uses U-Boot's serial alias from the aliases node to update
 230           the device tree passed to the OS. The "linux,stdout-path" property
 231           in the chosen node is set to point to the correct serial node.
 232           This option currently references CONFIG_CONS_INDEX, which is
 233           incorrect when used with device tree as this option does not
 234           exist / should not be used.
 235
 236 config SYS_EXTRA_OPTIONS
 237         string "Extra Options (DEPRECATED)"
 238         help
 239           The old configuration infrastructure (= mkconfig + boards.cfg)
 240           provided the extra options field. If you have something like
 241           "HAS_BAR,BAZ=64", the optional options
 242             #define CONFIG_HAS
 243             #define CONFIG_BAZ  64
 244           will be defined in include/config.h.
 245           This option was prepared for the smooth migration from the old
 246           configuration to Kconfig. Since this option will be removed sometime,
 247           new boards should not use this option.
 248
 249 config SYS_TEXT_BASE
 250         depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
 251                 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
 252         depends on !EFI_APP
 253         hex "Text Base"
 254         help
 255           TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
 256
 257 config SPL_LOAD_FIT
 258         bool "Enable SPL loading U-Boot as a FIT"
 259         depends on FIT
 260         help
 261           Normally with the SPL framework a legacy image is generated as part
 262           of the build. This contains U-Boot along with information as to
 263           where it should be loaded. This option instead enables generation
 264           of a FIT (Flat Image Tree) which provides more flexibility. In
 265           particular it can handle selecting from multiple device tree
 266           and passing the correct one to U-Boot.
 267
 268 config SPL_FIT_IMAGE_POST_PROCESS
 269         bool "Enable post-processing of FIT artifacts after loading by the SPL"
 270         depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
 271         help
 272           Allows doing any sort of manipulation to blobs after they got extracted
 273           from the U-Boot FIT image like stripping off headers or modifying the
 274           size of the blob, verification, authentication, decryption etc. in a
 275           platform or board specific way. In order to use this feature a platform
 276           or board-specific implementation of board_fit_image_post_process() must
 277           be provided. Also, anything done during this post-processing step would
 278           need to be comprehended in how the images were prepared before being
 279           injected into the FIT creation (i.e. the blobs would have been pre-
 280           processed before being added to the FIT image).
 281
 282 config FIT_IMAGE_POST_PROCESS
 283         bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 284         depends on FIT && TI_SECURE_DEVICE
 285         help
 286           Allows doing any sort of manipulation to blobs after they got extracted
 287           from FIT images like stripping off headers or modifying the size of the
 288           blob, verification, authentication, decryption etc. in a platform or
 289           board specific way. In order to use this feature a platform or board-
 290           specific implementation of board_fit_image_post_process() must be
 291           provided. Also, anything done during this post-processing step would
 292           need to be comprehended in how the images were prepared before being
 293           injected into the FIT creation (i.e. the blobs would have been pre-
 294           processed before being added to the FIT image).
 295
 296 config SYS_CLK_FREQ
 297         depends on ARC || ARCH_SUNXI
 298         int "CPU clock frequency"
 299         help
 300           TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 301
 302 config ARCH_FIXUP_FDT_MEMORY
 303         bool "Enable arch_fixup_memory_banks() call"
 304         default y
 305         help
 306           Enable FDT memory map syncup before OS boot. This feature can be
 307           used for booting OS with different memory setup where the part of
 308           the memory location should be used for different purpose.
 309
 310 endmenu         # Boot images
 311
 312 source "common/Kconfig"
 313
 314 source "cmd/Kconfig"
 315
 316 source "dts/Kconfig"
 317
 318 source "net/Kconfig"
 319
 320 source "drivers/Kconfig"
 321
 322 source "fs/Kconfig"
 323
 324 source "lib/Kconfig"
 325
 326 source "test/Kconfig"