Kconfig 15 KB

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  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. comment "Compiler: $(CC_VERSION_TEXT)"
  8. source "scripts/Kconfig.include"
  9. # Allow defaults in arch-specific code to override any given here
  10. source "arch/Kconfig"
  11. menu "General setup"
  12. config BROKEN
  13. bool
  14. help
  15. This option cannot be enabled. It is used as dependency
  16. for broken and incomplete features.
  17. config DEPRECATED
  18. bool
  19. help
  20. This option cannot be enabled. It it used as a dependency for
  21. code that relies on deprecated features that will be removed and
  22. the conversion deadline has passed.
  23. config LOCALVERSION
  24. string "Local version - append to U-Boot release"
  25. help
  26. Append an extra string to the end of your U-Boot version.
  27. This will show up in your boot log, for example.
  28. The string you set here will be appended after the contents of
  29. any files with a filename matching localversion* in your
  30. object and source tree, in that order. Your total string can
  31. be a maximum of 64 characters.
  32. config LOCALVERSION_AUTO
  33. bool "Automatically append version information to the version string"
  34. default y
  35. help
  36. This will try to automatically determine if the current tree is a
  37. release tree by looking for Git tags that belong to the current
  38. top of tree revision.
  39. A string of the format -gxxxxxxxx will be added to the localversion
  40. if a Git-based tree is found. The string generated by this will be
  41. appended after any matching localversion* files, and after the value
  42. set in CONFIG_LOCALVERSION.
  43. (The actual string used here is the first eight characters produced
  44. by running the command:
  45. $ git rev-parse --verify HEAD
  46. which is done within the script "scripts/setlocalversion".)
  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. This option is enabled by default for U-Boot.
  54. config OPTIMIZE_INLINING
  55. bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
  56. default n
  57. help
  58. This option determines if U-Boot forces gcc to inline the functions
  59. developers have marked 'inline'. Doing so takes away freedom from gcc to
  60. do what it thinks is best, which is desirable in some cases for size
  61. reasons.
  62. config SPL_OPTIMIZE_INLINING
  63. bool "Allow compiler to uninline functions marked 'inline' in SPL"
  64. depends on SPL
  65. default n
  66. help
  67. This option determines if U-Boot forces gcc to inline the functions
  68. developers have marked 'inline'. Doing so takes away freedom from gcc to
  69. do what it thinks is best, which is desirable in some cases for size
  70. reasons.
  71. config TPL_OPTIMIZE_INLINING
  72. bool "Allow compiler to uninline functions marked 'inline' in TPL"
  73. depends on TPL
  74. default n
  75. help
  76. This option determines if U-Boot forces gcc to inline the functions
  77. developers have marked 'inline'. Doing so takes away freedom from gcc to
  78. do what it thinks is best, which is desirable in some cases for size
  79. reasons.
  80. config CC_COVERAGE
  81. bool "Enable code coverage analysis"
  82. depends on SANDBOX
  83. help
  84. Enabling this option will pass "--coverage" to gcc to compile
  85. and link code instrumented for coverage analysis.
  86. config CC_HAS_ASM_INLINE
  87. def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
  88. config XEN
  89. bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
  90. help
  91. Enabling this option will make U-Boot be run as a bootloader
  92. for XEN [1] Virtual Machine.
  93. Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
  94. for para-virtualization. Xen can organize the safe execution of several
  95. virtual machines on the same physical system with performance close to
  96. native. It is used as the basis for a number of different commercial and
  97. open source applications, such as: server virtualization, Infrastructure
  98. as a Service (IaaS), desktop virtualization, security applications,
  99. embedded and hardware appliances.
  100. Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
  101. Xen to use the device drivers for the Domain-0 kernel by default.
  102. [1] - https://xenproject.org/
  103. config DISTRO_DEFAULTS
  104. bool "Select defaults suitable for booting general purpose Linux distributions"
  105. select AUTO_COMPLETE
  106. select CMDLINE_EDITING
  107. select CMD_BOOTI if ARM64
  108. select CMD_BOOTZ if ARM && !ARM64
  109. select CMD_DHCP if CMD_NET
  110. select CMD_ENV_EXISTS
  111. select CMD_EXT2
  112. select CMD_EXT4
  113. select CMD_FAT
  114. select CMD_FS_GENERIC
  115. select CMD_PART if PARTITIONS
  116. select CMD_PING if CMD_NET
  117. select CMD_PXE if NET
  118. select CMD_SYSBOOT
  119. select ENV_VARS_UBOOT_CONFIG
  120. select HUSH_PARSER
  121. select SUPPORT_RAW_INITRD
  122. select SYS_LONGHELP
  123. imply CMD_MII if NET
  124. imply USB_STORAGE
  125. imply USE_BOOTCOMMAND
  126. help
  127. Select this to enable various options and commands which are suitable
  128. for building u-boot for booting general purpose Linux distributions.
  129. config ENV_VARS_UBOOT_CONFIG
  130. bool "Add arch, board, vendor and soc variables to default environment"
  131. help
  132. Define this in order to add variables describing the
  133. U-Boot build configuration to the default environment.
  134. These will be named arch, cpu, board, vendor, and soc.
  135. Enabling this option will cause the following to be defined:
  136. - CONFIG_SYS_ARCH
  137. - CONFIG_SYS_CPU
  138. - CONFIG_SYS_BOARD
  139. - CONFIG_SYS_VENDOR
  140. - CONFIG_SYS_SOC
  141. config NR_DRAM_BANKS
  142. int "Number of DRAM banks"
  143. default 1 if ARCH_SUNXI || ARCH_OWL
  144. default 4
  145. help
  146. This defines the number of DRAM banks.
  147. config SYS_BOOT_GET_CMDLINE
  148. bool "Enable kernel command line setup"
  149. help
  150. Enables allocating and saving kernel cmdline in space between
  151. "bootm_low" and "bootm_low" + BOOTMAPSZ.
  152. config SYS_BOOT_GET_KBD
  153. bool "Enable kernel board information setup"
  154. help
  155. Enables allocating and saving a kernel copy of the bd_info in
  156. space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
  157. config SYS_MALLOC_F
  158. bool "Enable malloc() pool before relocation"
  159. default y if DM
  160. help
  161. Before relocation, memory is very limited on many platforms. Still,
  162. we can provide a small malloc() pool if needed. Driver model in
  163. particular needs this to operate, so that it can allocate the
  164. initial serial device and any others that are needed.
  165. config SYS_MALLOC_F_LEN
  166. hex "Size of malloc() pool before relocation"
  167. depends on SYS_MALLOC_F
  168. default 0x1000 if AM33XX
  169. default 0x4000 if SANDBOX
  170. default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
  171. ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5 || \
  172. ARCH_LS1012A || ARCH_LS1021A || ARCH_LS1043A || \
  173. ARCH_LS1046A || ARCH_QEMU || ARCH_SUNXI || ARCH_OWL)
  174. default 0x400
  175. help
  176. Before relocation, memory is very limited on many platforms. Still,
  177. we can provide a small malloc() pool if needed. Driver model in
  178. particular needs this to operate, so that it can allocate the
  179. initial serial device and any others that are needed.
  180. config SYS_MALLOC_LEN
  181. hex "Define memory for Dynamic allocation"
  182. depends on ARCH_ZYNQ || ARCH_VERSAL || ARCH_STM32MP || ARCH_ROCKCHIP
  183. default 0x2000000 if ARCH_ROCKCHIP
  184. help
  185. This defines memory to be allocated for Dynamic allocation
  186. TODO: Use for other architectures
  187. config SPL_SYS_MALLOC_F_LEN
  188. hex "Size of malloc() pool in SPL"
  189. depends on SYS_MALLOC_F && SPL
  190. default 0x2800 if RCAR_GEN3
  191. default SYS_MALLOC_F_LEN
  192. help
  193. In SPL memory is very limited on many platforms. Still,
  194. we can provide a small malloc() pool if needed. Driver model in
  195. particular needs this to operate, so that it can allocate the
  196. initial serial device and any others that are needed.
  197. It is possible to enable CONFIG_SYS_SPL_MALLOC_START to start a new
  198. malloc() region in SDRAM once it is inited.
  199. config TPL_SYS_MALLOC_F_LEN
  200. hex "Size of malloc() pool in TPL"
  201. depends on SYS_MALLOC_F && TPL
  202. default SPL_SYS_MALLOC_F_LEN
  203. help
  204. In TPL memory is very limited on many platforms. Still,
  205. we can provide a small malloc() pool if needed. Driver model in
  206. particular needs this to operate, so that it can allocate the
  207. initial serial device and any others that are needed.
  208. menuconfig EXPERT
  209. bool "Configure standard U-Boot features (expert users)"
  210. default y
  211. help
  212. This option allows certain base U-Boot options and settings
  213. to be disabled or tweaked. This is for specialized
  214. environments which can tolerate a "non-standard" U-Boot.
  215. Use this only if you really know what you are doing.
  216. if EXPERT
  217. config SYS_MALLOC_CLEAR_ON_INIT
  218. bool "Init with zeros the memory reserved for malloc (slow)"
  219. default y
  220. help
  221. This setting is enabled by default. The reserved malloc
  222. memory is initialized with zeros, so first malloc calls
  223. will return the pointer to the zeroed memory. But this
  224. slows the boot time.
  225. It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
  226. value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
  227. Then the boot time can be significantly reduced.
  228. Warning:
  229. When disabling this, please check if malloc calls, maybe
  230. should be replaced by calloc - if one expects zeroed memory.
  231. config SYS_MALLOC_DEFAULT_TO_INIT
  232. bool "Default malloc to init while reserving the memory for it"
  233. default n
  234. help
  235. It may happen that one needs to move the dynamic allocation
  236. from one to another memory range, eg. when moving the malloc
  237. from the limited static to a potentially large dynamic (DDR)
  238. memory.
  239. If so then on top of setting the updated memory aside one
  240. needs to bring the malloc init.
  241. If such a scenario is sought choose yes.
  242. config TOOLS_DEBUG
  243. bool "Enable debug information for tools"
  244. help
  245. Enable generation of debug information for tools such as mkimage.
  246. This can be used for debugging purposes. With debug information
  247. it is possible to set breakpoints on particular lines, single-step
  248. debug through the source code, etc.
  249. endif # EXPERT
  250. config PHYS_64BIT
  251. bool "64bit physical address support"
  252. help
  253. Say Y here to support 64bit physical memory address.
  254. This can be used not only for 64bit SoCs, but also for
  255. large physical address extension on 32bit SoCs.
  256. config HAS_ROM
  257. bool
  258. select BINMAN
  259. help
  260. Enables building of a u-boot.rom target. This collects U-Boot and
  261. any necessary binary blobs.
  262. config ROM_NEEDS_BLOBS
  263. bool
  264. depends on HAS_ROM
  265. help
  266. Enable this if building the u-boot.rom target needs binary blobs, and
  267. so cannot be done normally. In this case, U-Boot will only build the
  268. ROM if the required blobs exist. If not, you will see an warning like:
  269. Image 'main-section' is missing external blobs and is non-functional:
  270. intel-descriptor intel-me intel-refcode intel-vga intel-mrc
  271. config BUILD_ROM
  272. bool "Build U-Boot as BIOS replacement"
  273. depends on HAS_ROM
  274. default y if !ROM_NEEDS_BLOBS
  275. help
  276. This option allows to build a ROM version of U-Boot.
  277. The build process generally requires several binary blobs
  278. which are not shipped in the U-Boot source tree.
  279. Please, see doc/arch/x86.rst for details.
  280. config SPL_IMAGE
  281. string "SPL image used in the combined SPL+U-Boot image"
  282. default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  283. default "spl/u-boot-spl.bin"
  284. depends on SPL
  285. help
  286. Select the SPL build target that shall be generated by the SPL
  287. build process (default spl/u-boot-spl.bin). This image will be
  288. used to generate a combined image with SPL and main U-Boot
  289. proper as one single image.
  290. config BUILD_TARGET
  291. string "Build target special images"
  292. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
  293. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
  294. default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
  295. default "u-boot-elf.srec" if RCAR_GEN3
  296. default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
  297. ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
  298. default "u-boot.kwb" if ARCH_KIRKWOOD
  299. default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  300. default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
  301. help
  302. Some SoCs need special image types (e.g. U-Boot binary
  303. with a special header) as build targets. By defining
  304. CONFIG_BUILD_TARGET in the SoC / board header, this
  305. special image will be automatically built upon calling
  306. make / buildman.
  307. config SYS_CUSTOM_LDSCRIPT
  308. bool "Use a custom location for the U-Boot linker script"
  309. help
  310. Normally when linking U-Boot we will look in the board directory,
  311. the CPU directory and finally the "cpu" directory of the architecture
  312. for the ile "u-boot.lds" and use that as our linker. However, in
  313. some cases we need to provide a different linker script. To do so,
  314. enable this option and then provide the location under
  315. CONFIG_SYS_LDSCRIPT.
  316. config SYS_LDSCRIPT
  317. depends on SYS_CUSTOM_LDSCRIPT
  318. string "Custom ldscript location"
  319. help
  320. Path within the source tree to the linker script to use for the
  321. main U-Boot binary.
  322. config ERR_PTR_OFFSET
  323. hex
  324. default 0x0
  325. help
  326. Some U-Boot pointers have redundant information, so we can use a
  327. scheme where we can return either an error code or a pointer with the
  328. same return value. The default implementation just casts the pointer
  329. to a number, however, this may fail on platforms where the end of the
  330. address range is used for valid pointers (e.g. 0xffffff00 is a valid
  331. heap pointer in socfpga SPL).
  332. For such platforms, this value provides an upper range of those error
  333. pointer values - up to 'MAX_ERRNO' bytes below this value must be
  334. unused/invalid addresses.
  335. config PLATFORM_ELFENTRY
  336. string
  337. default "__start" if MIPS
  338. default "_start"
  339. config STACK_SIZE
  340. hex "Define max stack size that can be used by U-Boot"
  341. default 0x4000000 if ARCH_VERSAL || ARCH_ZYNQMP
  342. default 0x200000 if MICROBLAZE
  343. default 0x1000000
  344. help
  345. Define Max stack size that can be used by U-Boot. This value is used
  346. by the UEFI sub-system. On some boards initrd_high is calculated as
  347. base stack pointer minus this stack size.
  348. config SYS_HAS_SRAM
  349. bool
  350. default y if TARGET_PIC32MZDASK
  351. default y if TARGET_DEVKIT8000
  352. default y if TARGET_TRICORDER
  353. default n
  354. help
  355. Enable this to allow support for the on board SRAM.
  356. SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
  357. SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
  358. config SYS_SRAM_BASE
  359. hex
  360. default 0x80000000 if TARGET_PIC32MZDASK
  361. default 0x40200000 if TARGET_DEVKIT8000
  362. default 0x40200000 if TARGET_TRICORDER
  363. default 0x0
  364. config SYS_SRAM_SIZE
  365. hex
  366. default 0x00080000 if TARGET_PIC32MZDASK
  367. default 0x10000 if TARGET_DEVKIT8000
  368. default 0x10000 if TARGET_TRICORDER
  369. default 0x0
  370. config EXAMPLES
  371. bool "Compile API examples"
  372. depends on !SANDBOX
  373. default y if ARCH_QEMU
  374. help
  375. U-Boot provides an API for standalone applications. Examples are
  376. provided in directory examples/.
  377. endmenu # General setup
  378. source "api/Kconfig"
  379. source "common/Kconfig"
  380. source "cmd/Kconfig"
  381. source "disk/Kconfig"
  382. source "dts/Kconfig"
  383. source "env/Kconfig"
  384. source "net/Kconfig"
  385. source "drivers/Kconfig"
  386. source "fs/Kconfig"
  387. source "lib/Kconfig"
  388. source "test/Kconfig"
  389. source "tools/Kconfig"