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