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
  59         default n
  60         select CMD_BOOTZ if ARM && !ARM64
  61         select CMD_BOOTI if ARM64
  62         select CMD_DHCP
  63         select CMD_EXT2
  64         select CMD_EXT4
  65         select CMD_FAT
  66         select CMD_FS_GENERIC
  67         select CMD_MII
  68         select CMD_PING
  69         select HUSH_PARSER
  70         help
  71           Select this to enable various options and commands which are suitable
  72           for building u-boot for booting general purpose Linux distributions.
  73
  74 config SYS_MALLOC_F
  75         bool "Enable malloc() pool before relocation"
  76         default y if DM
  77         help
  78           Before relocation, memory is very limited on many platforms. Still,
  79           we can provide a small malloc() pool if needed. Driver model in
  80           particular needs this to operate, so that it can allocate the
  81           initial serial device and any others that are needed.
  82
  83 config SYS_MALLOC_F_LEN
  84         hex "Size of malloc() pool before relocation"
  85         depends on SYS_MALLOC_F
  86         default 0x400
  87         help
  88           Before relocation, memory is very limited on many platforms. Still,
  89           we can provide a small malloc() pool if needed. Driver model in
  90           particular needs this to operate, so that it can allocate the
  91           initial serial device and any others that are needed.
  92
  93 menuconfig EXPERT
  94         bool "Configure standard U-Boot features (expert users)"
  95         default y
  96         help
  97           This option allows certain base U-Boot options and settings
  98           to be disabled or tweaked. This is for specialized
  99           environments which can tolerate a "non-standard" U-Boot.
 100           Use this only if you really know what you are doing.
 101
 102 if EXPERT
 103         config SYS_MALLOC_CLEAR_ON_INIT
 104         bool "Init with zeros the memory reserved for malloc (slow)"
 105         default y
 106         help
 107           This setting is enabled by default. The reserved malloc
 108           memory is initialized with zeros, so first malloc calls
 109           will return the pointer to the zeroed memory. But this
 110           slows the boot time.
 111
 112           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 113           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 114           Then the boot time can be significantly reduced.
 115           Warning:
 116           When disabling this, please check if malloc calls, maybe
 117           should be replaced by calloc - if one expects zeroed memory.
 118
 119 config TOOLS_DEBUG
 120         bool "Enable debug information for tools"
 121         help
 122           Enable generation of debug information for tools such as mkimage.
 123           This can be used for debugging purposes. With debug information
 124           it is possible to set breakpoints on particular lines, single-step
 125           debug through the source code, etc.
 126
 127 endif
 128
 129 config PHYS_64BIT
 130         bool "64bit physical address support"
 131         help
 132           Say Y here to support 64bit physical memory address.
 133           This can be used not only for 64bit SoCs, but also for
 134           large physical address extention on 32bit SoCs.
 135
 136 endmenu         # General setup
 137
 138 menu "Boot images"
 139
 140 config SUPPORT_SPL
 141         bool
 142
 143 config SUPPORT_TPL
 144         bool
 145
 146 config SPL
 147         bool
 148         depends on SUPPORT_SPL
 149         prompt "Enable SPL"
 150         help
 151           If you want to build SPL as well as the normal image, say Y.
 152
 153 config SPL_SYS_MALLOC_SIMPLE
 154         bool
 155         depends on SPL
 156         prompt "Only use malloc_simple functions in the SPL"
 157         help
 158           Say Y here to only use the *_simple malloc functions from
 159           malloc_simple.c, rather then using the versions from dlmalloc.c;
 160           this will make the SPL binary smaller at the cost of more heap
 161           usage as the *_simple malloc functions do not re-use free-ed mem.
 162
 163 config SPL_STACK_R
 164         depends on SPL
 165         bool "Enable SDRAM location for SPL stack"
 166         help
 167           SPL starts off execution in SRAM and thus typically has only a small
 168           stack available. Since SPL sets up DRAM while in its board_init_f()
 169           function, it is possible for the stack to move there before
 170           board_init_r() is reached. This option enables a special SDRAM
 171           location for the SPL stack. U-Boot SPL switches to this after
 172           board_init_f() completes, and before board_init_r() starts.
 173
 174 config SPL_STACK_R_ADDR
 175         depends on SPL_STACK_R
 176         hex "SDRAM location for SPL stack"
 177         help
 178           Specify the address in SDRAM for the SPL stack. This will be set up
 179           before board_init_r() is called.
 180
 181 config SPL_STACK_R_MALLOC_SIMPLE_LEN
 182         depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
 183         hex "Size of malloc_simple heap after switching to DRAM SPL stack"
 184         default 0x100000
 185         help
 186           Specify the amount of the stack to use as memory pool for
 187           malloc_simple after switching the stack to DRAM. This may be set
 188           to give board_init_r() a larger heap then the initial heap in
 189           SRAM which is limited to SYS_MALLOC_F_LEN bytes.
 190
 191 config SPL_SEPARATE_BSS
 192         depends on SPL
 193         bool "BSS section is in a different memory region from text"
 194         help
 195           Some platforms need a large BSS region in SPL and can provide this
 196           because RAM is already set up. In this case BSS can be moved to RAM.
 197           This option should then be enabled so that the correct device tree
 198           location is used. Normally we put the device tree at the end of BSS
 199           but with this option enabled, it goes at _image_binary_end.
 200
 201 config TPL
 202         bool
 203         depends on SPL && SUPPORT_TPL
 204         prompt "Enable TPL"
 205         help
 206           If you want to build TPL as well as the normal image and SPL, say Y.
 207
 208 config FIT
 209         bool "Support Flattened Image Tree"
 210         help
 211           This option allows to boot the new uImage structrure,
 212           Flattened Image Tree.  FIT is formally a FDT, which can include
 213           images of various types (kernel, FDT blob, ramdisk, etc.)
 214           in a single blob.  To boot this new uImage structure,
 215           pass the address of the blob to the "bootm" command.
 216           FIT is very flexible, supporting compression, multiple images,
 217           multiple configurations, verification through hashing and also
 218           verified boot (secure boot using RSA). This option enables that
 219           feature.
 220
 221 config SPL_FIT
 222         bool "Support Flattened Image Tree within SPL"
 223         depends on FIT
 224         depends on SPL
 225
 226 config FIT_VERBOSE
 227         bool "Display verbose messages on FIT boot"
 228         depends on FIT
 229
 230 config FIT_SIGNATURE
 231         bool "Enable signature verification of FIT uImages"
 232         depends on FIT
 233         depends on DM
 234         select RSA
 235         help
 236           This option enables signature verification of FIT uImages,
 237           using a hash signed and verified using RSA. If
 238           CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 239           hashing is available using hardware, then then RSA library will use
 240           it. See doc/uImage.FIT/signature.txt for more details.
 241
 242           WARNING: When relying on signed FIT images with a required signature
 243           check the legacy image format is disabled by default, so that
 244           unsigned images cannot be loaded. If a board needs the legacy image
 245           format support in this case, enable it using
 246           CONFIG_IMAGE_FORMAT_LEGACY.
 247
 248 config SPL_FIT_SIGNATURE
 249         bool "Enable signature verification of FIT firmware within SPL"
 250         depends on SPL_FIT
 251         depends on SPL_DM
 252         select SPL_RSA
 253
 254 config FIT_BEST_MATCH
 255         bool "Select the best match for the kernel device tree"
 256         depends on FIT
 257         help
 258           When no configuration is explicitly selected, default to the
 259           one whose fdt's compatibility field best matches that of
 260           U-Boot itself. A match is considered "best" if it matches the
 261           most specific compatibility entry of U-Boot's fdt's root node.
 262           The order of entries in the configuration's fdt is ignored.
 263
 264 config FIT_VERBOSE
 265         bool "Show verbose messages when FIT images fails"
 266         depends on FIT
 267         help
 268           Generally a system will have valid FIT images so debug messages
 269           are a waste of code space. If you are debugging your images then
 270           you can enable this option to get more verbose information about
 271           failures.
 272
 273 config OF_BOARD_SETUP
 274         bool "Set up board-specific details in device tree before boot"
 275         depends on OF_LIBFDT
 276         help
 277           This causes U-Boot to call ft_board_setup() before booting into
 278           the Operating System. This function can set up various
 279           board-specific information in the device tree for use by the OS.
 280           The device tree is then passed to the OS.
 281
 282 config OF_SYSTEM_SETUP
 283         bool "Set up system-specific details in device tree before boot"
 284         depends on OF_LIBFDT
 285         help
 286           This causes U-Boot to call ft_system_setup() before booting into
 287           the Operating System. This function can set up various
 288           system-specific information in the device tree for use by the OS.
 289           The device tree is then passed to the OS.
 290
 291 config OF_STDOUT_VIA_ALIAS
 292         bool "Update the device-tree stdout alias from U-Boot"
 293         depends on OF_LIBFDT
 294         help
 295           This uses U-Boot's serial alias from the aliases node to update
 296           the device tree passed to the OS. The "linux,stdout-path" property
 297           in the chosen node is set to point to the correct serial node.
 298           This option currently references CONFIG_CONS_INDEX, which is
 299           incorrect when used with device tree as this option does not
 300           exist / should not be used.
 301
 302 config SYS_EXTRA_OPTIONS
 303         string "Extra Options (DEPRECATED)"
 304         help
 305           The old configuration infrastructure (= mkconfig + boards.cfg)
 306           provided the extra options field. If you have something like
 307           "HAS_BAR,BAZ=64", the optional options
 308             #define CONFIG_HAS
 309             #define CONFIG_BAZ  64
 310           will be defined in include/config.h.
 311           This option was prepared for the smooth migration from the old
 312           configuration to Kconfig. Since this option will be removed sometime,
 313           new boards should not use this option.
 314
 315 config SYS_TEXT_BASE
 316         depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
 317                 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
 318         depends on !EFI_APP
 319         hex "Text Base"
 320         help
 321           TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
 322
 323 config SPL_LOAD_FIT
 324         bool "Enable SPL loading U-Boot as a FIT"
 325         depends on FIT
 326         help
 327           Normally with the SPL framework a legacy image is generated as part
 328           of the build. This contains U-Boot along with information as to
 329           where it should be loaded. This option instead enables generation
 330           of a FIT (Flat Image Tree) which provides more flexibility. In
 331           particular it can handle selecting from multiple device tree
 332           and passing the correct one to U-Boot.
 333
 334 config SPL_FIT_IMAGE_POST_PROCESS
 335         bool "Enable post-processing of FIT artifacts after loading by the SPL"
 336         depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
 337         help
 338           Allows doing any sort of manipulation to blobs after they got extracted
 339           from the U-Boot FIT image like stripping off headers or modifying the
 340           size of the blob, verification, authentication, decryption etc. in a
 341           platform or board specific way. In order to use this feature a platform
 342           or board-specific implementation of board_fit_image_post_process() must
 343           be provided. Also, anything done during this post-processing step would
 344           need to be comprehended in how the images were prepared before being
 345           injected into the FIT creation (i.e. the blobs would have been pre-
 346           processed before being added to the FIT image).
 347
 348 config FIT_IMAGE_POST_PROCESS
 349         bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 350         depends on FIT && TI_SECURE_DEVICE
 351         help
 352           Allows doing any sort of manipulation to blobs after they got extracted
 353           from FIT images like stripping off headers or modifying the size of the
 354           blob, verification, authentication, decryption etc. in a platform or
 355           board specific way. In order to use this feature a platform or board-
 356           specific implementation of board_fit_image_post_process() must be
 357           provided. Also, anything done during this post-processing step would
 358           need to be comprehended in how the images were prepared before being
 359           injected into the FIT creation (i.e. the blobs would have been pre-
 360           processed before being added to the FIT image).
 361
 362 config SYS_CLK_FREQ
 363         depends on ARC || ARCH_SUNXI
 364         int "CPU clock frequency"
 365         help
 366           TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 367
 368 config ARCH_FIXUP_FDT
 369         bool "Enable arch_fixup_fdt() call"
 370         depends on ARM || MIPS
 371         default y
 372         help
 373           Enable FDT memory map syncup before OS boot. This feature can be
 374           used for booting OS with different memory setup where the part of
 375           the memory location should be used for different purpose.
 376
 377 endmenu         # Boot images
 378
 379 source "common/Kconfig"
 380
 381 source "cmd/Kconfig"
 382
 383 source "dts/Kconfig"
 384
 385 source "net/Kconfig"
 386
 387 source "drivers/Kconfig"
 388
 389 source "fs/Kconfig"
 390
 391 source "lib/Kconfig"
 392
 393 source "test/Kconfig"