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