Kconfig 16 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_IS_GCC
  48. def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
  49. config GCC_VERSION
  50. int
  51. default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
  52. default 0
  53. config CC_IS_CLANG
  54. def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
  55. config CLANG_VERSION
  56. int
  57. default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
  58. config CC_OPTIMIZE_FOR_SIZE
  59. bool "Optimize for size"
  60. default y
  61. help
  62. Enabling this option will pass "-Os" instead of "-O2" to gcc
  63. resulting in a smaller U-Boot image.
  64. This option is enabled by default for U-Boot.
  65. config OPTIMIZE_INLINING
  66. bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
  67. help
  68. This option determines if U-Boot forces gcc to inline the functions
  69. developers have marked 'inline'. Doing so takes away freedom from gcc to
  70. do what it thinks is best, which is desirable in some cases for size
  71. reasons.
  72. config SPL_OPTIMIZE_INLINING
  73. bool "Allow compiler to uninline functions marked 'inline' in SPL"
  74. depends on SPL
  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 ARCH_SUPPORTS_LTO
  81. bool
  82. config LTO
  83. bool "Enable Link Time Optimizations"
  84. depends on ARCH_SUPPORTS_LTO
  85. help
  86. This option enables Link Time Optimization (LTO), a mechanism which
  87. allows the compiler to optimize between different compilation units.
  88. This can optimize away dead code paths, resulting in smaller binary
  89. size (if CC_OPTIMIZE_FOR_SIZE is enabled).
  90. This option is not available for every architecture and may
  91. introduce bugs.
  92. Currently, when compiling with GCC, due to a weird bug regarding
  93. jobserver, the final linking will not respect make's --jobs argument.
  94. Instead all available processors will be used (as reported by the
  95. nproc command).
  96. If unsure, say n.
  97. config TPL_OPTIMIZE_INLINING
  98. bool "Allow compiler to uninline functions marked 'inline' in TPL"
  99. depends on TPL
  100. help
  101. This option determines if U-Boot forces gcc to inline the functions
  102. developers have marked 'inline'. Doing so takes away freedom from gcc to
  103. do what it thinks is best, which is desirable in some cases for size
  104. reasons.
  105. config CC_COVERAGE
  106. bool "Enable code coverage analysis"
  107. depends on SANDBOX
  108. help
  109. Enabling this option will pass "--coverage" to gcc to compile
  110. and link code instrumented for coverage analysis.
  111. config CC_HAS_ASM_INLINE
  112. def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
  113. config XEN
  114. bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
  115. help
  116. Enabling this option will make U-Boot be run as a bootloader
  117. for XEN [1] Virtual Machine.
  118. Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
  119. for para-virtualization. Xen can organize the safe execution of several
  120. virtual machines on the same physical system with performance close to
  121. native. It is used as the basis for a number of different commercial and
  122. open source applications, such as: server virtualization, Infrastructure
  123. as a Service (IaaS), desktop virtualization, security applications,
  124. embedded and hardware appliances.
  125. Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
  126. Xen to use the device drivers for the Domain-0 kernel by default.
  127. [1] - https://xenproject.org/
  128. config DISTRO_DEFAULTS
  129. bool "Select defaults suitable for booting general purpose Linux distributions"
  130. select AUTO_COMPLETE
  131. select CMDLINE_EDITING
  132. select CMD_BOOTI if ARM64
  133. select CMD_BOOTZ if ARM && !ARM64
  134. select CMD_DHCP if CMD_NET
  135. select CMD_ENV_EXISTS
  136. select CMD_EXT2
  137. select CMD_EXT4
  138. select CMD_FAT
  139. select CMD_FS_GENERIC
  140. select CMD_PART if PARTITIONS
  141. select CMD_PING if CMD_NET
  142. select CMD_PXE if NET
  143. select CMD_SYSBOOT
  144. select ENV_VARS_UBOOT_CONFIG
  145. select HUSH_PARSER
  146. select SUPPORT_RAW_INITRD
  147. select SYS_LONGHELP
  148. imply CMD_MII if NET
  149. imply USB_STORAGE
  150. imply USE_BOOTCOMMAND
  151. help
  152. Select this to enable various options and commands which are suitable
  153. for building u-boot for booting general purpose Linux distributions.
  154. config ENV_VARS_UBOOT_CONFIG
  155. bool "Add arch, board, vendor and soc variables to default environment"
  156. help
  157. Define this in order to add variables describing the
  158. U-Boot build configuration to the default environment.
  159. These will be named arch, cpu, board, vendor, and soc.
  160. Enabling this option will cause the following to be defined:
  161. - CONFIG_SYS_ARCH
  162. - CONFIG_SYS_CPU
  163. - CONFIG_SYS_BOARD
  164. - CONFIG_SYS_VENDOR
  165. - CONFIG_SYS_SOC
  166. config NR_DRAM_BANKS
  167. int "Number of DRAM banks"
  168. default 1 if ARCH_SUNXI || ARCH_OWL
  169. default 4
  170. help
  171. This defines the number of DRAM banks.
  172. config SYS_BOOT_GET_CMDLINE
  173. bool "Enable kernel command line setup"
  174. help
  175. Enables allocating and saving kernel cmdline in space between
  176. "bootm_low" and "bootm_low" + BOOTMAPSZ.
  177. config SYS_BOOT_GET_KBD
  178. bool "Enable kernel board information setup"
  179. help
  180. Enables allocating and saving a kernel copy of the bd_info in
  181. space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
  182. config SYS_MALLOC_F
  183. bool "Enable malloc() pool before relocation"
  184. default y if DM
  185. help
  186. Before relocation, memory is very limited on many platforms. Still,
  187. we can provide a small malloc() pool if needed. Driver model in
  188. particular needs this to operate, so that it can allocate the
  189. initial serial device and any others that are needed.
  190. config SYS_MALLOC_F_LEN
  191. hex "Size of malloc() pool before relocation"
  192. depends on SYS_MALLOC_F
  193. default 0x1000 if AM33XX
  194. default 0x4000 if SANDBOX
  195. default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
  196. ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5 || \
  197. ARCH_LS1012A || ARCH_LS1021A || ARCH_LS1043A || \
  198. ARCH_LS1046A || ARCH_QEMU || ARCH_SUNXI || ARCH_OWL)
  199. default 0x400
  200. help
  201. Before relocation, memory is very limited on many platforms. Still,
  202. we can provide a small malloc() pool if needed. Driver model in
  203. particular needs this to operate, so that it can allocate the
  204. initial serial device and any others that are needed.
  205. config SYS_MALLOC_LEN
  206. hex "Define memory for Dynamic allocation"
  207. default 0x2000000 if ARCH_ROCKCHIP || ARCH_OMAP2PLUS || ARCH_MESON
  208. default 0x200000 if ARCH_BMIPS || X86
  209. default 0x120000 if MACH_SUNIV
  210. default 0x220000 if MACH_SUN8I_V3S
  211. default 0x4020000 if ARCH_SUNXI
  212. default 0x400000
  213. help
  214. This defines memory to be allocated for Dynamic allocation
  215. TODO: Use for other architectures
  216. config SPL_SYS_MALLOC_F_LEN
  217. hex "Size of malloc() pool in SPL"
  218. depends on SYS_MALLOC_F && SPL
  219. default 0x2800 if RCAR_GEN3
  220. default SYS_MALLOC_F_LEN
  221. help
  222. In SPL 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. It is possible to enable CONFIG_SYS_SPL_MALLOC_START to start a new
  227. malloc() region in SDRAM once it is inited.
  228. config TPL_SYS_MALLOC_F_LEN
  229. hex "Size of malloc() pool in TPL"
  230. depends on SYS_MALLOC_F && TPL
  231. default SPL_SYS_MALLOC_F_LEN
  232. help
  233. In TPL memory is very limited on many platforms. Still,
  234. we can provide a small malloc() pool if needed. Driver model in
  235. particular needs this to operate, so that it can allocate the
  236. initial serial device and any others that are needed.
  237. menuconfig EXPERT
  238. bool "Configure standard U-Boot features (expert users)"
  239. default y
  240. help
  241. This option allows certain base U-Boot options and settings
  242. to be disabled or tweaked. This is for specialized
  243. environments which can tolerate a "non-standard" U-Boot.
  244. Use this only if you really know what you are doing.
  245. if EXPERT
  246. config SYS_MALLOC_CLEAR_ON_INIT
  247. bool "Init with zeros the memory reserved for malloc (slow)"
  248. default y
  249. help
  250. This setting is enabled by default. The reserved malloc
  251. memory is initialized with zeros, so first malloc calls
  252. will return the pointer to the zeroed memory. But this
  253. slows the boot time.
  254. It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
  255. value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
  256. Then the boot time can be significantly reduced.
  257. Warning:
  258. When disabling this, please check if malloc calls, maybe
  259. should be replaced by calloc - if one expects zeroed memory.
  260. config SYS_MALLOC_DEFAULT_TO_INIT
  261. bool "Default malloc to init while reserving the memory for it"
  262. help
  263. It may happen that one needs to move the dynamic allocation
  264. from one to another memory range, eg. when moving the malloc
  265. from the limited static to a potentially large dynamic (DDR)
  266. memory.
  267. If so then on top of setting the updated memory aside one
  268. needs to bring the malloc init.
  269. If such a scenario is sought choose yes.
  270. config TOOLS_DEBUG
  271. bool "Enable debug information for tools"
  272. help
  273. Enable generation of debug information for tools such as mkimage.
  274. This can be used for debugging purposes. With debug information
  275. it is possible to set breakpoints on particular lines, single-step
  276. debug through the source code, etc.
  277. endif # EXPERT
  278. config PHYS_64BIT
  279. bool "64bit physical address support"
  280. help
  281. Say Y here to support 64bit physical memory address.
  282. This can be used not only for 64bit SoCs, but also for
  283. large physical address extension on 32bit SoCs.
  284. config HAS_ROM
  285. bool
  286. select BINMAN
  287. help
  288. Enables building of a u-boot.rom target. This collects U-Boot and
  289. any necessary binary blobs.
  290. config SPL_IMAGE
  291. string "SPL image used in the combined SPL+U-Boot image"
  292. default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  293. default "spl/u-boot-spl.bin"
  294. depends on SPL
  295. help
  296. Select the SPL build target that shall be generated by the SPL
  297. build process (default spl/u-boot-spl.bin). This image will be
  298. used to generate a combined image with SPL and main U-Boot
  299. proper as one single image.
  300. config REMAKE_ELF
  301. bool "Recreate an ELF image from raw U-Boot binary"
  302. help
  303. Enable this to recreate an ELF image (u-boot.elf) from the raw
  304. U-Boot binary (u-boot.bin), which may already have been statically
  305. relocated and may already have a device-tree appended to it.
  306. config BUILD_TARGET
  307. string "Build target special images"
  308. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
  309. default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
  310. default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
  311. default "u-boot-elf.srec" if RCAR_GEN3
  312. default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
  313. ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
  314. default "u-boot.kwb" if ARCH_KIRKWOOD
  315. default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
  316. default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
  317. help
  318. Some SoCs need special image types (e.g. U-Boot binary
  319. with a special header) as build targets. By defining
  320. CONFIG_BUILD_TARGET in the SoC / board header, this
  321. special image will be automatically built upon calling
  322. make / buildman.
  323. config SYS_CUSTOM_LDSCRIPT
  324. bool "Use a custom location for the U-Boot linker script"
  325. help
  326. Normally when linking U-Boot we will look in the board directory,
  327. the CPU directory and finally the "cpu" directory of the architecture
  328. for the ile "u-boot.lds" and use that as our linker. However, in
  329. some cases we need to provide a different linker script. To do so,
  330. enable this option and then provide the location under
  331. CONFIG_SYS_LDSCRIPT.
  332. config SYS_LDSCRIPT
  333. depends on SYS_CUSTOM_LDSCRIPT
  334. string "Custom ldscript location"
  335. help
  336. Path within the source tree to the linker script to use for the
  337. main U-Boot binary.
  338. config SYS_LOAD_ADDR
  339. hex "Address in memory to use by default"
  340. default 0x01000000 if ARCH_SOCFPGA
  341. default 0x02000000 if PPC || X86
  342. default 0x81000000 if MACH_SUNIV
  343. default 0x22000000 if MACH_SUN9I
  344. default 0x42000000 if ARCH_SUNXI
  345. default 0x82000000 if ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_K3
  346. default 0x82000000 if ARCH_MX6 && (MX6SL || MX6SLL || MX6SX || MX6UL || MX6ULL)
  347. default 0x12000000 if ARCH_MX6 && !(MX6SL || MX6SLL || MX6SX || MX6UL || MX6ULL)
  348. default 0x80800000 if ARCH_MX7
  349. default 0x90000000 if FSL_LSCH2 || FSL_LSCH3
  350. help
  351. Address in memory to use as the default safe load address.
  352. config ERR_PTR_OFFSET
  353. hex
  354. default 0x0
  355. help
  356. Some U-Boot pointers have redundant information, so we can use a
  357. scheme where we can return either an error code or a pointer with the
  358. same return value. The default implementation just casts the pointer
  359. to a number, however, this may fail on platforms where the end of the
  360. address range is used for valid pointers (e.g. 0xffffff00 is a valid
  361. heap pointer in socfpga SPL).
  362. For such platforms, this value provides an upper range of those error
  363. pointer values - up to 'MAX_ERRNO' bytes below this value must be
  364. unused/invalid addresses.
  365. config PLATFORM_ELFENTRY
  366. string
  367. default "__start" if MIPS
  368. default "_start"
  369. config STACK_SIZE
  370. hex "Define max stack size that can be used by U-Boot"
  371. default 0x4000000 if ARCH_VERSAL || ARCH_ZYNQMP
  372. default 0x200000 if MICROBLAZE
  373. default 0x1000000
  374. help
  375. Define Max stack size that can be used by U-Boot. This value is used
  376. by the UEFI sub-system. On some boards initrd_high is calculated as
  377. base stack pointer minus this stack size.
  378. config SYS_HAS_SRAM
  379. bool
  380. default y if TARGET_PIC32MZDASK
  381. default y if TARGET_DEVKIT8000
  382. default y if TARGET_TRICORDER
  383. help
  384. Enable this to allow support for the on board SRAM.
  385. SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
  386. SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
  387. config SYS_SRAM_BASE
  388. hex
  389. default 0x80000000 if TARGET_PIC32MZDASK
  390. default 0x40200000 if TARGET_DEVKIT8000
  391. default 0x40200000 if TARGET_TRICORDER
  392. default 0x0
  393. config SYS_SRAM_SIZE
  394. hex
  395. default 0x00080000 if TARGET_PIC32MZDASK
  396. default 0x10000 if TARGET_DEVKIT8000
  397. default 0x10000 if TARGET_TRICORDER
  398. default 0x0
  399. config MP
  400. bool "Support for multiprocessor"
  401. help
  402. This provides an option to bringup different processors
  403. in multiprocessor cases.
  404. config EXAMPLES
  405. bool "Compile API examples"
  406. depends on !SANDBOX
  407. default y if ARCH_QEMU
  408. help
  409. U-Boot provides an API for standalone applications. Examples are
  410. provided in directory examples/.
  411. endmenu # General setup
  412. source "api/Kconfig"
  413. source "boot/Kconfig"
  414. source "common/Kconfig"
  415. source "cmd/Kconfig"
  416. source "disk/Kconfig"
  417. source "dts/Kconfig"
  418. source "env/Kconfig"
  419. source "net/Kconfig"
  420. source "drivers/Kconfig"
  421. source "fs/Kconfig"
  422. source "lib/Kconfig"
  423. source "test/Kconfig"
  424. source "tools/Kconfig"