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 comment "Compiler: $(CC_VERSION_TEXT)"
   9
  10 source "scripts/Kconfig.include"
  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 BROKEN
  18         bool
  19         help
  20           This option cannot be enabled. It is used as dependency
  21           for broken and incomplete features.
  22
  23 config DEPRECATED
  24         bool
  25         help
  26           This option cannot be enabled.  It it used as a dependency for
  27           code that relies on deprecated features that will be removed and
  28           the conversion deadline has passed.
  29
  30 config LOCALVERSION
  31         string "Local version - append to U-Boot release"
  32         help
  33           Append an extra string to the end of your U-Boot version.
  34           This will show up in your boot log, for example.
  35           The string you set here will be appended after the contents of
  36           any files with a filename matching localversion* in your
  37           object and source tree, in that order.  Your total string can
  38           be a maximum of 64 characters.
  39
  40 config LOCALVERSION_AUTO
  41         bool "Automatically append version information to the version string"
  42         default y
  43         help
  44           This will try to automatically determine if the current tree is a
  45           release tree by looking for Git tags that belong to the current
  46           top of tree revision.
  47
  48           A string of the format -gxxxxxxxx will be added to the localversion
  49           if a Git-based tree is found.  The string generated by this will be
  50           appended after any matching localversion* files, and after the value
  51           set in CONFIG_LOCALVERSION.
  52
  53           (The actual string used here is the first eight characters produced
  54           by running the command:
  55
  56             $ git rev-parse --verify HEAD
  57
  58           which is done within the script "scripts/setlocalversion".)
  59
  60 config CC_IS_GCC
  61         def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
  62
  63 config GCC_VERSION
  64         int
  65         default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
  66         default 0
  67
  68 config CC_IS_CLANG
  69         def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
  70
  71 config CLANG_VERSION
  72         int
  73         default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
  74
  75 choice
  76         prompt "Optimization level"
  77         default CC_OPTIMIZE_FOR_SIZE
  78
  79 config CC_OPTIMIZE_FOR_SIZE
  80         bool "Optimize for size"
  81         help
  82           Enabling this option will pass "-Os" to gcc, resulting in a smaller
  83           U-Boot image.
  84
  85           This option is enabled by default for U-Boot.
  86
  87 config CC_OPTIMIZE_FOR_SPEED
  88         bool "Optimize for speed"
  89         help
  90           Enabling this option will pass "-O2" to gcc, resulting in a faster
  91           U-Boot image.
  92
  93 config CC_OPTIMIZE_FOR_DEBUG
  94         bool "Optimize for debugging"
  95         help
  96           Enabling this option will pass "-Og" to gcc, enabling optimizations
  97           which don't interfere with debugging.
  98
  99 endchoice
 100
 101 config OPTIMIZE_INLINING
 102         bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
 103         help
 104           This option determines if U-Boot forces gcc to inline the functions
 105           developers have marked 'inline'. Doing so takes away freedom from gcc to
 106           do what it thinks is best, which is desirable in some cases for size
 107           reasons.
 108
 109 config SPL_OPTIMIZE_INLINING
 110         bool "Allow compiler to uninline functions marked 'inline' in SPL"
 111         depends on SPL
 112         help
 113           This option determines if U-Boot forces gcc to inline the functions
 114           developers have marked 'inline'. Doing so takes away freedom from gcc to
 115           do what it thinks is best, which is desirable in some cases for size
 116           reasons.
 117
 118 config ARCH_SUPPORTS_LTO
 119         bool
 120
 121 config LTO
 122         bool "Enable Link Time Optimizations"
 123         depends on ARCH_SUPPORTS_LTO
 124         help
 125           This option enables Link Time Optimization (LTO), a mechanism which
 126           allows the compiler to optimize between different compilation units.
 127
 128           This can optimize away dead code paths, resulting in smaller binary
 129           size (if CC_OPTIMIZE_FOR_SIZE is enabled).
 130
 131           This option is not available for every architecture and may
 132           introduce bugs.
 133
 134           Currently, when compiling with GCC, due to a weird bug regarding
 135           jobserver, the final linking will not respect make's --jobs argument.
 136           Instead all available processors will be used (as reported by the
 137           nproc command).
 138
 139           If unsure, say n.
 140
 141 config TPL_OPTIMIZE_INLINING
 142         bool "Allow compiler to uninline functions marked 'inline' in TPL"
 143         depends on TPL
 144         help
 145           This option determines if U-Boot forces gcc to inline the functions
 146           developers have marked 'inline'. Doing so takes away freedom from gcc to
 147           do what it thinks is best, which is desirable in some cases for size
 148           reasons.
 149
 150 config CC_COVERAGE
 151         bool "Enable code coverage analysis"
 152         depends on SANDBOX
 153         help
 154           Enabling this option will pass "--coverage" to gcc to compile
 155           and link code instrumented for coverage analysis.
 156
 157 config ASAN
 158         bool "Enable AddressSanitizer"
 159         depends on SANDBOX
 160         help
 161           Enables AddressSanitizer to discover out-of-bounds accesses,
 162           use-after-free, double-free and memory leaks.
 163
 164 config FUZZ
 165         bool "Enable fuzzing"
 166         depends on CC_IS_CLANG
 167         depends on DM_FUZZING_ENGINE
 168         select ASAN
 169         help
 170           Enables the fuzzing infrastructure to generate fuzzing data and run
 171           fuzz tests.
 172
 173 config CC_HAS_ASM_INLINE
 174         def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
 175
 176 config XEN
 177         bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
 178         depends on ARM64
 179         select SSCANF
 180         help
 181           Enabling this option will make U-Boot be run as a bootloader
 182           for XEN [1] Virtual Machine.
 183
 184           Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
 185           for para-virtualization. Xen can organize the safe execution of several
 186           virtual machines on the same physical system with performance close to
 187           native. It is used as the basis for a number of different commercial and
 188           open source applications, such as: server virtualization, Infrastructure
 189           as a Service (IaaS), desktop virtualization, security applications,
 190           embedded and hardware appliances.
 191           Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
 192           Xen to use the device drivers for the Domain-0 kernel by default.
 193
 194           [1] - https://xenproject.org/
 195
 196 config ENV_VARS_UBOOT_CONFIG
 197         bool "Add arch, board, vendor and soc variables to default environment"
 198         help
 199           Define this in order to add variables describing the
 200           U-Boot build configuration to the default environment.
 201           These will be named arch, cpu, board, vendor, and soc.
 202           Enabling this option will cause the following to be defined:
 203           - CONFIG_SYS_ARCH
 204           - CONFIG_SYS_CPU
 205           - CONFIG_SYS_BOARD
 206           - CONFIG_SYS_VENDOR
 207           - CONFIG_SYS_SOC
 208
 209 config NR_DRAM_BANKS
 210         int "Number of DRAM banks"
 211         default 1 if ARCH_SUNXI || ARCH_OWL
 212         default 4
 213         help
 214           This defines the number of DRAM banks.
 215
 216 config SYS_BOOT_GET_CMDLINE
 217         bool "Enable kernel command line setup"
 218         help
 219           Enables allocating and saving kernel cmdline in space between
 220           "bootm_low" and "bootm_low" + BOOTMAPSZ.
 221
 222 config SYS_BARGSIZE
 223         int "Size of kernel command line buffer in bytes"
 224         depends on SYS_BOOT_GET_CMDLINE
 225         default 512
 226         help
 227           Buffer size for Boot Arguments which are passed to the application
 228           (usually a Linux kernel) when it is booted
 229
 230 config SYS_BOOT_GET_KBD
 231         bool "Enable kernel board information setup"
 232         help
 233           Enables allocating and saving a kernel copy of the bd_info in
 234           space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
 235
 236 config HAS_CUSTOM_SYS_INIT_SP_ADDR
 237         bool "Use a custom location for the initial stack pointer address"
 238         depends on ARC || (ARM && !INIT_SP_RELATIVE) || MIPS || PPC || RISCV
 239         default y if TFABOOT
 240         help
 241           Typically, we use an initial stack pointer address that is calculated
 242           by taking the statically defined CFG_SYS_INIT_RAM_ADDR, adding the
 243           statically defined CFG_SYS_INIT_RAM_SIZE and then subtracting the
 244           build-time constant of GENERATED_GBL_DATA_SIZE.  On MIPS a different
 245           but statica calculation is performed.  However, some platforms will
 246           take a different approach.  Say Y here to define the address statically
 247           instead.
 248
 249 config CUSTOM_SYS_INIT_SP_ADDR
 250         hex "Static location for the initial stack pointer"
 251         depends on HAS_CUSTOM_SYS_INIT_SP_ADDR
 252         default TEXT_BASE if TFABOOT
 253
 254 config SYS_MALLOC_F
 255         bool "Enable malloc() pool before relocation"
 256         default y if DM
 257
 258         help
 259           Before relocation, memory is very limited on many platforms. Still,
 260           we can provide a small malloc() pool if needed. Driver model in
 261           particular needs this to operate, so that it can allocate the
 262           initial serial device and any others that are needed.
 263
 264 config SYS_MALLOC_F_LEN
 265         hex "Size of malloc() pool before relocation"
 266         depends on SYS_MALLOC_F
 267         default 0x400 if M68K || PPC || ROCKCHIP_PX30 || ROCKCHIP_RK3036 || \
 268                          ROCKCHIP_RK3308 || ROCKCHIP_RV1108
 269         default 0x600 if ARCH_ZYNQMP_R5 || ARCH_ZYNQMP
 270         default 0x800 if ARCH_ZYNQ || ROCKCHIP_RK3128 || ROCKCHIP_RK3188 || \
 271                          ROCKCHIP_RK322X || X86
 272         default 0x1000 if ARCH_MESON || ARCH_BMIPS || ARCH_MTMIPS
 273         default 0x1800 if ARCH_TEGRA
 274         default 0x4000 if SANDBOX || RISCV || ARCH_APPLE || ROCKCHIP_RK3368 || \
 275                           ROCKCHIP_RK3399
 276         default 0x8000 if RCAR_GEN3
 277         default 0x10000 if ARCH_IMX8 || ARCH_IMX8M
 278         default 0x2000
 279         help
 280                 Size of the malloc() pool for use before relocation. If
 281                 this is defined, then a very simple malloc() implementation
 282                 will become available before relocation. The address is just
 283                 below the global data, and the stack is moved down to make
 284                 space.
 285
 286                 This feature allocates regions with increasing addresses
 287                 within the region. calloc() is supported, but realloc()
 288                 is not available. free() is supported but does nothing.
 289                 The memory will be freed (or in fact just forgotten) when
 290                 U-Boot relocates itself.
 291
 292 config SYS_MALLOC_LEN
 293         hex "Define memory for Dynamic allocation"
 294         default 0x4000000 if SANDBOX
 295         default 0x2000000 if ARCH_ROCKCHIP || ARCH_OMAP2PLUS || ARCH_MESON
 296         default 0x200000 if ARCH_BMIPS || X86
 297         default 0x4020000 if SUNXI_MINIMUM_DRAM_MB >= 256
 298         default 0x220000 if SUNXI_MINIMUM_DRAM_MB >= 64
 299         default 0x120000 if SUNXI_MINIMUM_DRAM_MB >= 32
 300         default 0x400000
 301         help
 302           This defines memory to be allocated for Dynamic allocation
 303           TODO: Use for other architectures
 304
 305 config SPL_SYS_MALLOC_F
 306         bool "Enable malloc() pool in SPL"
 307         depends on SPL_FRAMEWORK && SYS_MALLOC_F && SPL
 308         default y
 309         help
 310           In SPL memory is very limited on many platforms. Still,
 311           we can provide a small malloc() pool if needed. Driver model in
 312           particular needs this to operate, so that it can allocate the
 313           initial serial device and any others that are needed.
 314
 315 config SPL_SYS_MALLOC_F_LEN
 316         hex "Size of malloc() pool in SPL"
 317         depends on SPL_SYS_MALLOC_F
 318         default 0x2800 if RCAR_GEN3
 319         default 0x2000 if IMX8MQ
 320         default SYS_MALLOC_F_LEN
 321         help
 322           Sets the size of the malloc() pool in SPL. This is used for
 323           driver model and other features, which must allocate memory for
 324           data structures.
 325
 326           It is possible to enable CFG_SPL_SYS_MALLOC_START to start a new
 327           malloc() region in SDRAM once it is inited.
 328
 329 config TPL_SYS_MALLOC_F
 330         bool "Enable malloc() pool in TPL"
 331         depends on SYS_MALLOC_F && TPL
 332         default y if SPL_SYS_MALLOC_F
 333         help
 334           In TPL memory is very limited on many platforms. Still,
 335           we can provide a small malloc() pool if needed. Driver model in
 336           particular needs this to operate, so that it can allocate the
 337           initial serial device and any others that are needed.
 338
 339 config TPL_SYS_MALLOC_F_LEN
 340         hex "Size of malloc() pool in TPL"
 341         depends on TPL_SYS_MALLOC_F
 342         default SPL_SYS_MALLOC_F_LEN
 343         help
 344           Sets the size of the malloc() pool in TPL. This is used for
 345           driver model and other features, which must allocate memory for
 346           data structures.
 347
 348 config VALGRIND
 349         bool "Inform valgrind about memory allocations"
 350         depends on !RISCV
 351         help
 352           Valgrind is an instrumentation framework for building dynamic analysis
 353           tools. In particular, it may be used to detect memory management bugs
 354           in U-Boot. It relies on knowing when heap blocks are allocated in
 355           order to give accurate results. This happens automatically for
 356           standard allocator functions provided by the host OS. However, this
 357           doesn't automatically happen for U-Boot's malloc implementation.
 358
 359           Enable this option to annotate U-Boot's malloc implementation so that
 360           it can be handled accurately by Valgrind. If you aren't planning on
 361           using valgrind to debug U-Boot, say 'n'.
 362
 363 config VPL_SYS_MALLOC_F
 364         bool "Enable malloc() pool in VPL"
 365         depends on SYS_MALLOC_F && VPL
 366         default y if SPL_SYS_MALLOC_F
 367         help
 368           In VPL memory is very limited on many platforms. Still,
 369           we can provide a small malloc() pool if needed. Driver model in
 370           particular needs this to operate, so that it can allocate the
 371           initial serial device and any others that are needed.
 372
 373 config VPL_SYS_MALLOC_F_LEN
 374         hex "Size of malloc() pool in VPL before relocation"
 375         depends on VPL_SYS_MALLOC_F
 376         default SPL_SYS_MALLOC_F_LEN
 377         help
 378           Sets the size of the malloc() pool in VPL. This is used for
 379           driver model and other features, which must allocate memory for
 380           data structures.
 381
 382 menuconfig EXPERT
 383         bool "Configure standard U-Boot features (expert users)"
 384         default y
 385         help
 386           This option allows certain base U-Boot options and settings
 387           to be disabled or tweaked. This is for specialized
 388           environments which can tolerate a "non-standard" U-Boot.
 389           Use this only if you really know what you are doing.
 390
 391 if EXPERT
 392         config SYS_MALLOC_CLEAR_ON_INIT
 393         bool "Init with zeros the memory reserved for malloc (slow)"
 394         default y
 395         help
 396           This setting is enabled by default. The reserved malloc
 397           memory is initialized with zeros, so first malloc calls
 398           will return the pointer to the zeroed memory. But this
 399           slows the boot time.
 400
 401           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 402           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 403           Then the boot time can be significantly reduced.
 404           Warning:
 405           When disabling this, please check if malloc calls, maybe
 406           should be replaced by calloc - if one expects zeroed memory.
 407
 408 config SPL_SYS_MALLOC_CLEAR_ON_INIT
 409         bool "Init with zeros the memory reserved for malloc (slow) in SPL"
 410         depends on SPL
 411         default SYS_MALLOC_CLEAR_ON_INIT
 412         help
 413           Same as SYS_MALLOC_CLEAR_ON_INIT, but for SPL. It's possible to
 414           Enable it without SYS_MALLOC_CLEAR_ON_INIT. It's useful for boards
 415           that must have particular memory regions zero'ed before first use.
 416           If SYS_SPL_MALLOC_START is configured to be in such region, this
 417           option should be enabled.
 418
 419 config SYS_MALLOC_DEFAULT_TO_INIT
 420         bool "Default malloc to init while reserving the memory for it"
 421         help
 422           It may happen that one needs to move the dynamic allocation
 423           from one to another memory range, eg. when moving the malloc
 424           from the limited static to a potentially large dynamic (DDR)
 425           memory.
 426
 427           If so then on top of setting the updated memory aside one
 428           needs to bring the malloc init.
 429
 430           If such a scenario is sought choose yes.
 431
 432 config TOOLS_DEBUG
 433         bool "Enable debug information for tools"
 434         help
 435           Enable generation of debug information for tools such as mkimage.
 436           This can be used for debugging purposes. With debug information
 437           it is possible to set breakpoints on particular lines, single-step
 438           debug through the source code, etc.
 439
 440 endif # EXPERT
 441
 442 config PHYS_64BIT
 443         bool "64bit physical address support"
 444         select FDT_64BIT
 445         help
 446           Say Y here to support 64bit physical memory address.
 447           This can be used not only for 64bit SoCs, but also for
 448           large physical address extension on 32bit SoCs.
 449
 450 config FDT_64BIT
 451         bool "64bit fdt address support"
 452         help
 453           Say Y here to support 64bit fdt addresses.
 454           This can be used not only for 64bit SoCs, but also
 455           for large address extensions on 32bit SoCs.
 456
 457 config HAS_ROM
 458         bool
 459         select BINMAN
 460         help
 461           Enables building of a u-boot.rom target. This collects U-Boot and
 462           any necessary binary blobs.
 463
 464 config SPL_IMAGE
 465         string "SPL image used in the combined SPL+U-Boot image"
 466         default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 467         default "spl/u-boot-spl.bin"
 468         depends on SPL
 469         help
 470           Select the SPL build target that shall be generated by the SPL
 471           build process (default spl/u-boot-spl.bin). This image will be
 472           used to generate a combined image with SPL and main U-Boot
 473           proper as one single image.
 474
 475 config REMAKE_ELF
 476         bool "Recreate an ELF image from raw U-Boot binary"
 477         help
 478           Enable this to recreate an ELF image (u-boot.elf) from the raw
 479           U-Boot binary (u-boot.bin), which may already have been statically
 480           relocated and may already have a device-tree appended to it.
 481
 482 config BUILD_TARGET
 483         string "Build target special images"
 484         default "u-boot-elf.srec" if RCAR_64
 485         default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 486         default "u-boot-with-spl.bin" if MPC85xx && !E500MC && !E5500 && !E6500 && SPL
 487         default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
 488         default "u-boot-with-spl.kwb" if ARMADA_32BIT && SPL
 489         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
 490         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
 491         default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
 492                                 RISCV || ARCH_ZYNQMP)
 493         default "u-boot.kwb" if (ARCH_KIRKWOOD || ARMADA_32BIT) && !SPL
 494         help
 495           Some SoCs need special image types (e.g. U-Boot binary
 496           with a special header) as build targets. By defining
 497           CONFIG_BUILD_TARGET in the SoC / board header, this
 498           special image will be automatically built upon calling
 499           make / buildman.
 500
 501 config HAS_BOARD_SIZE_LIMIT
 502         bool "Define a maximum size for the U-Boot image"
 503         default y if RCAR_64
 504         help
 505           In some cases, we need to enforce a hard limit on how big the U-Boot
 506           image itself can be.
 507
 508 config BOARD_SIZE_LIMIT
 509         int "Maximum size of the U-Boot image in bytes"
 510         default 1048576 if RCAR_64
 511         depends on HAS_BOARD_SIZE_LIMIT
 512         help
 513           Maximum size of the U-Boot image. When defined, the build system
 514           checks that the actual size does not exceed it.  This does not
 515           include SPL nor TPL, on platforms that use that functionality, they
 516           have a separate option to restict size.
 517
 518 config SYS_CUSTOM_LDSCRIPT
 519         bool "Use a custom location for the U-Boot linker script"
 520         help
 521           Normally when linking U-Boot we will look in the board directory,
 522           the CPU directory and finally the "cpu" directory of the architecture
 523           for the ile "u-boot.lds" and use that as our linker.  However, in
 524           some cases we need to provide a different linker script.  To do so,
 525           enable this option and then provide the location under
 526           CONFIG_SYS_LDSCRIPT.
 527
 528 config SYS_LDSCRIPT
 529         depends on SYS_CUSTOM_LDSCRIPT
 530         string "Custom ldscript location"
 531         help
 532           Path within the source tree to the linker script to use for the
 533           main U-Boot binary.
 534
 535 config SYS_LOAD_ADDR
 536         hex "Address in memory to use by default"
 537         default 0x01000000 if ARCH_SOCFPGA
 538         default 0x02000000 if PPC || X86
 539         default 0x81000000 if MACH_SUNIV
 540         default 0x22000000 if MACH_SUN9I
 541         default 0x42000000 if ARCH_SUNXI
 542         default 0x82000000 if ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_K3
 543         default 0x82000000 if ARCH_MX6 && (MX6SL || MX6SLL  || MX6SX || MX6UL || MX6ULL)
 544         default 0x12000000 if ARCH_MX6 && !(MX6SL || MX6SLL  || MX6SX || MX6UL || MX6ULL)
 545         default 0x80800000 if ARCH_MX7
 546         default 0x90000000 if FSL_LSCH2 || FSL_LSCH3
 547         help
 548           Address in memory to use as the default safe load address.
 549
 550 config ERR_PTR_OFFSET
 551         hex
 552         default 0x0
 553         help
 554           Some U-Boot pointers have redundant information, so we can use a
 555           scheme where we can return either an error code or a pointer with the
 556           same return value. The default implementation just casts the pointer
 557           to a number, however, this may fail on platforms where the end of the
 558           address range is used for valid pointers (e.g. 0xffffff00 is a valid
 559           heap pointer in socfpga SPL).
 560           For such platforms, this value provides an upper range of those error
 561           pointer values - up to 'MAX_ERRNO' bytes below this value must be
 562           unused/invalid addresses.
 563
 564 config PLATFORM_ELFENTRY
 565         string
 566         default "__start" if MIPS
 567         default "_start"
 568
 569 config STACK_SIZE
 570         hex "Define max stack size that can be used by U-Boot"
 571         default 0x4000000 if ARCH_VERSAL_NET || ARCH_VERSAL || ARCH_ZYNQMP
 572         default 0x200000 if MICROBLAZE
 573         default 0x1000000
 574         help
 575           Define Max stack size that can be used by U-Boot. This value is used
 576           by the UEFI sub-system. On some boards initrd_high is calculated as
 577           base stack pointer minus this stack size.
 578
 579 config SYS_MEM_TOP_HIDE
 580         hex "Exclude some memory from U-Boot / OS information"
 581         default 0x0
 582         help
 583           If set, this specified memory area will get subtracted from the top
 584           (end) of RAM and won't get "touched" at all by U-Boot. By fixing up
 585           gd->ram_size the OS / next stage should gets passed the now
 586           "corrected" memory size and won't touch it either.
 587           WARNING: Please make sure that this value is a multiple of the OS
 588           page size.
 589
 590 config SYS_HAS_SRAM
 591         bool
 592         default y if TARGET_PIC32MZDASK
 593         default y if TARGET_DEVKIT8000
 594         default y if TARGET_TRICORDER
 595         help
 596           Enable this to allow support for the on board SRAM.
 597           SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
 598           SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
 599
 600 config SYS_SRAM_BASE
 601         hex
 602         default 0x80000000 if TARGET_PIC32MZDASK
 603         default 0x40200000 if TARGET_DEVKIT8000
 604         default 0x40200000 if TARGET_TRICORDER
 605         default 0x0
 606
 607 config SYS_SRAM_SIZE
 608         hex
 609         default 0x00080000 if TARGET_PIC32MZDASK
 610         default 0x10000 if TARGET_DEVKIT8000
 611         default 0x10000 if TARGET_TRICORDER
 612         default 0x0
 613
 614 config SYS_MONITOR_LEN
 615         int "Maximum size in bytes reserved for U-Boot in memory"
 616         default 1048576 if X86
 617         default 786432 if ARCH_SUNXI
 618         default 0
 619         help
 620           Size of memory reserved for monitor code, used to determine
 621           _at_compile_time_ (!) if the environment is embedded within the
 622           U-Boot image, or in a separate flash sector, among other uses where
 623           we need to set a maximum size of the U-Boot binary itself that will
 624           be loaded.
 625
 626 config MP
 627         bool "Support for multiprocessor"
 628         help
 629           This provides an option to bringup different processors
 630           in multiprocessor cases.
 631
 632 config HAVE_TEXT_BASE
 633         bool
 634         depends on !NIOS2 && !XTENSA
 635         depends on !EFI_APP
 636         default y
 637
 638 config TEXT_BASE
 639         depends on HAVE_TEXT_BASE
 640         default 0x0 if POSITION_INDEPENDENT
 641         default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
 642         default 0x81700000 if MACH_SUNIV
 643         default 0x2a000000 if MACH_SUN9I
 644         default 0x4a000000 if SUNXI_MINIMUM_DRAM_MB >= 256
 645         default 0x42e00000 if SUNXI_MINIMUM_DRAM_MB >= 64
 646         hex "Text Base"
 647         help
 648           The address in memory that U-Boot will be copied and executed from
 649           initially.
 650
 651 config HAVE_SYS_UBOOT_START
 652         bool "Use custom U-Boot Start"
 653         depends on HAVE_TEXT_BASE
 654         help
 655           By default, the address in memory that U-Boot will be copied from
 656           (TEXT_BASE) and the entry point are the same. Select this to start the
 657           execution of U-Boot from a different address.
 658           This may be required if a header or vector table needs to be copied
 659           but not executed.
 660
 661 config SYS_UBOOT_START
 662         hex
 663         depends on HAVE_TEXT_BASE
 664         default TEXT_BASE
 665         prompt "U-Boot entry" if HAVE_SYS_UBOOT_START
 666         help
 667           If TEXT_BASE differs from the start of execution, this sets the
 668           address in memory that U-Boot will start execution from initially.
 669
 670 config HAVE_SYS_MONITOR_BASE
 671         bool
 672         depends on ARC || MIPS || M68K || NIOS2 || PPC || XTENSA || X86 \
 673                 || ENV_IS_IN_FLASH || MTD_NOR_FLASH
 674         depends on !EFI_APP
 675         default y
 676
 677 config SYS_MONITOR_BASE
 678         depends on HAVE_SYS_MONITOR_BASE
 679         hex "Physical start address of boot monitor code"
 680         default TEXT_BASE
 681         help
 682           The physical start address of boot monitor code (which is the same as
 683           CONFIG_TEXT_BASE when linking) and the same as CFG_SYS_FLASH_BASE
 684           when booting from flash.
 685
 686 config SPL_SYS_MONITOR_BASE
 687         depends on MPC85xx && SPL && HAVE_SYS_MONITOR_BASE
 688         hex "Physical start address of SPL monitor code"
 689         default SPL_TEXT_BASE
 690
 691 config TPL_SYS_MONITOR_BASE
 692         depends on MPC85xx && TPL && HAVE_SYS_MONITOR_BASE
 693         hex "Physical start address of TPL monitor code"
 694
 695 config DYNAMIC_SYS_CLK_FREQ
 696         bool "Determine CPU clock frequency at run-time"
 697         help
 698           Implement a get_board_sys_clk function that will determine the CPU
 699           clock frequency at run time, rather than define it statically.
 700
 701 config SYS_CLK_FREQ
 702         depends on !DYNAMIC_SYS_CLK_FREQ
 703         int "CPU clock frequency"
 704         default 125000000 if ARCH_LS1012A
 705         default 100000000 if ARCH_P2020 || ARCH_T1024 || ARCH_T1042 || \
 706                              ARCH_LS1021A || FSL_LSCH2 || FSL_LSCH3
 707         default 66666666 if ARCH_P1010 || ARCH_P1020 || ARCH_T4240
 708         default 66660000 if ARCH_T2080
 709         default 33333333 if RCAR_GEN3
 710         default 24000000 if ARCH_EXYNOS
 711         default 20000000 if RCAR_GEN2
 712         default 0
 713         help
 714           A static value for the CPU frequency.  Note that if not required
 715           for a given SoC, this can be left at 0.
 716
 717 source "api/Kconfig"
 718
 719 endmenu         # General setup
 720
 721 source "boot/Kconfig"
 722
 723 source "common/Kconfig"
 724
 725 source "cmd/Kconfig"
 726
 727 source "disk/Kconfig"
 728
 729 source "dts/Kconfig"
 730
 731 source "env/Kconfig"
 732
 733 source "net/Kconfig"
 734
 735 source "drivers/Kconfig"
 736
 737 source "fs/Kconfig"
 738
 739 source "lib/Kconfig"
 740
 741 source "test/Kconfig"
 742
 743 source "tools/Kconfig"