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 before relocation"
  189. depends on SYS_MALLOC_F && SPL
  190. default 0x2800 if RCAR_GEN3
  191. default SYS_MALLOC_F_LEN
  192. help
  193. Before relocation, 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. config TPL_SYS_MALLOC_F_LEN
  198. hex "Size of malloc() pool in TPL before relocation"
  199. depends on SYS_MALLOC_F && TPL
  200. default SYS_MALLOC_F_LEN
  201. help
  202. Before relocation, memory is very limited on many platforms. Still,
  203. we can provide a small malloc() pool if needed. Driver model in
  204. particular needs this to operate, so that it can allocate the
  205. initial serial device and any others that are needed.
  206. menuconfig EXPERT
  207. bool "Configure standard U-Boot features (expert users)"
  208. default y
  209. help
  210. This option allows certain base U-Boot options and settings
  211. to be disabled or tweaked. This is for specialized
  212. environments which can tolerate a "non-standard" U-Boot.
  213. Use this only if you really know what you are doing.
  214. if EXPERT
  215. config SYS_MALLOC_CLEAR_ON_INIT
  216. bool "Init with zeros the memory reserved for malloc (slow)"
  217. default y
  218. help
  219. This setting is enabled by default. The reserved malloc
  220. memory is initialized with zeros, so first malloc calls
  221. will return the pointer to the zeroed memory. But this
  222. slows the boot time.
  223. It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
  224. value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
  225. Then the boot time can be significantly reduced.
  226. Warning:
  227. When disabling this, please check if malloc calls, maybe
  228. should be replaced by calloc - if one expects zeroed memory.
  229. config SYS_MALLOC_DEFAULT_TO_INIT
  230. bool "Default malloc to init while reserving the memory for it"
  231. default n
  232. help
  233. It may happen that one needs to move the dynamic allocation
  234. from one to another memory range, eg. when moving the malloc
  235. from the limited static to a potentially large dynamic (DDR)
  236. memory.
  237. If so then on top of setting the updated memory aside one
  238. needs to bring the malloc init.
  239. If such a scenario is sought choose yes.
  240. config TOOLS_DEBUG
  241. bool "Enable debug information for tools"
  242. help
  243. Enable generation of debug information for tools such as mkimage.
  244. This can be used for debugging purposes. With debug information
  245. it is possible to set breakpoints on particular lines, single-step
  246. debug through the source code, etc.
  247. endif # EXPERT
  248. config PHYS_64BIT
  249. bool "64bit physical address support"
  250. help
  251. Say Y here to support 64bit physical memory address.
  252. This can be used not only for 64bit SoCs, but also for
  253. large physical address extension on 32bit SoCs.
  254. config HAS_ROM
  255. bool
  256. select BINMAN
  257. help
  258. Enables building of a u-boot.rom target. This collects U-Boot and
  259. any necessary binary blobs.
  260. config ROM_NEEDS_BLOBS
  261. bool
  262. depends on HAS_ROM
  263. help
  264. Enable this if building the u-boot.rom target needs binary blobs, and
  265. so cannot be done normally. In this case, U-Boot will only build the
  266. ROM if the required blobs exist. If not, you will see an warning like:
  267. Image 'main-section' is missing external blobs and is non-functional:
  268. intel-descriptor intel-me intel-refcode intel-vga intel-mrc
  269. config BUILD_ROM
  270. bool "Build U-Boot as BIOS replacement"
  271. depends on HAS_ROM
  272. default y if !ROM_NEEDS_BLOBS
  273. help
  274. This option allows to build a ROM version of U-Boot.
  275. The build process generally requires several binary blobs
  276. which are not shipped in the U-Boot source tree.
  277. Please, see doc/arch/x86.rst for details.
  278. config SPL_IMAGE
  279. string "SPL image used in the combined SPL+U-Boot image"
  280. default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  281. default "spl/u-boot-spl.bin"
  282. depends on SPL
  283. help
  284. Select the SPL build target that shall be generated by the SPL
  285. build process (default spl/u-boot-spl.bin). This image will be
  286. used to generate a combined image with SPL and main U-Boot
  287. proper as one single image.
  288. config BUILD_TARGET
  289. string "Build target special images"
  290. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
  291. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
  292. default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
  293. default "u-boot-elf.srec" if RCAR_GEN3
  294. default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
  295. ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
  296. default "u-boot.kwb" if ARCH_KIRKWOOD
  297. default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  298. default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
  299. help
  300. Some SoCs need special image types (e.g. U-Boot binary
  301. with a special header) as build targets. By defining
  302. CONFIG_BUILD_TARGET in the SoC / board header, this
  303. special image will be automatically built upon calling
  304. make / buildman.
  305. config SYS_CUSTOM_LDSCRIPT
  306. bool "Use a custom location for the U-Boot linker script"
  307. help
  308. Normally when linking U-Boot we will look in the board directory,
  309. the CPU directory and finally the "cpu" directory of the architecture
  310. for the ile "u-boot.lds" and use that as our linker. However, in
  311. some cases we need to provide a different linker script. To do so,
  312. enable this option and then provide the location under
  313. CONFIG_SYS_LDSCRIPT.
  314. config SYS_LDSCRIPT
  315. depends on SYS_CUSTOM_LDSCRIPT
  316. string "Custom ldscript location"
  317. help
  318. Path within the source tree to the linker script to use for the
  319. main U-Boot binary.
  320. config ERR_PTR_OFFSET
  321. hex
  322. default 0x0
  323. help
  324. Some U-Boot pointers have redundant information, so we can use a
  325. scheme where we can return either an error code or a pointer with the
  326. same return value. The default implementation just casts the pointer
  327. to a number, however, this may fail on platforms where the end of the
  328. address range is used for valid pointers (e.g. 0xffffff00 is a valid
  329. heap pointer in socfpga SPL).
  330. For such platforms, this value provides an upper range of those error
  331. pointer values - up to 'MAX_ERRNO' bytes below this value must be
  332. unused/invalid addresses.
  333. config PLATFORM_ELFENTRY
  334. string
  335. default "__start" if MIPS
  336. default "_start"
  337. config STACK_SIZE
  338. hex "Define max stack size that can be used by U-Boot"
  339. default 0x4000000 if ARCH_VERSAL || ARCH_ZYNQMP
  340. default 0x200000 if MICROBLAZE
  341. default 0x1000000
  342. help
  343. Define Max stack size that can be used by U-Boot. This value is used
  344. by the UEFI sub-system. On some boards initrd_high is calculated as
  345. base stack pointer minus this stack size.
  346. config SYS_HAS_SRAM
  347. bool
  348. default y if TARGET_PIC32MZDASK
  349. default y if TARGET_DEVKIT8000
  350. default y if TARGET_TRICORDER
  351. default n
  352. help
  353. Enable this to allow support for the on board SRAM.
  354. SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
  355. SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
  356. config SYS_SRAM_BASE
  357. hex
  358. default 0x80000000 if TARGET_PIC32MZDASK
  359. default 0x40200000 if TARGET_DEVKIT8000
  360. default 0x40200000 if TARGET_TRICORDER
  361. default 0x0
  362. config SYS_SRAM_SIZE
  363. hex
  364. default 0x00080000 if TARGET_PIC32MZDASK
  365. default 0x10000 if TARGET_DEVKIT8000
  366. default 0x10000 if TARGET_TRICORDER
  367. default 0x0
  368. config EXAMPLES
  369. bool "Compile API examples"
  370. depends on !SANDBOX
  371. default y if ARCH_QEMU
  372. help
  373. U-Boot provides an API for standalone applications. Examples are
  374. provided in directory examples/.
  375. endmenu # General setup
  376. source "api/Kconfig"
  377. source "common/Kconfig"
  378. source "cmd/Kconfig"
  379. source "disk/Kconfig"
  380. source "dts/Kconfig"
  381. source "env/Kconfig"
  382. source "net/Kconfig"
  383. source "drivers/Kconfig"
  384. source "fs/Kconfig"
  385. source "lib/Kconfig"
  386. source "test/Kconfig"
  387. source "tools/Kconfig"