Kconfig 11 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. config UBOOTVERSION
  8. string
  9. option env="UBOOTVERSION"
  10. # Allow defaults in arch-specific code to override any given here
  11. source "arch/Kconfig"
  12. menu "General setup"
  13. config LOCALVERSION
  14. string "Local version - append to U-Boot release"
  15. help
  16. Append an extra string to the end of your U-Boot version.
  17. This will show up in your boot log, for example.
  18. The string you set here will be appended after the contents of
  19. any files with a filename matching localversion* in your
  20. object and source tree, in that order. Your total string can
  21. be a maximum of 64 characters.
  22. config LOCALVERSION_AUTO
  23. bool "Automatically append version information to the version string"
  24. default y
  25. help
  26. This will try to automatically determine if the current tree is a
  27. release tree by looking for Git tags that belong to the current
  28. top of tree revision.
  29. A string of the format -gxxxxxxxx will be added to the localversion
  30. if a Git-based tree is found. The string generated by this will be
  31. appended after any matching localversion* files, and after the value
  32. set in CONFIG_LOCALVERSION.
  33. (The actual string used here is the first eight characters produced
  34. by running the command:
  35. $ git rev-parse --verify HEAD
  36. which is done within the script "scripts/setlocalversion".)
  37. config CC_OPTIMIZE_FOR_SIZE
  38. bool "Optimize for size"
  39. default y
  40. help
  41. Enabling this option will pass "-Os" instead of "-O2" to gcc
  42. resulting in a smaller U-Boot image.
  43. This option is enabled by default for U-Boot.
  44. config DISTRO_DEFAULTS
  45. bool "Select defaults suitable for booting general purpose Linux distributions"
  46. default y if ARCH_SUNXI
  47. default n
  48. select CMD_BOOTZ
  49. select CMD_DHCP
  50. select CMD_EXT2
  51. select CMD_EXT4
  52. select CMD_FAT
  53. select CMD_FS_GENERIC
  54. select CMD_MII
  55. select CMD_PING
  56. select HUSH_PARSER
  57. help
  58. Select this to enable various options and commands which are suitable
  59. for building u-boot for booting general purpose Linux distributions.
  60. config SYS_MALLOC_F
  61. bool "Enable malloc() pool before relocation"
  62. default y if DM
  63. help
  64. Before relocation, memory is very limited on many platforms. Still,
  65. we can provide a small malloc() pool if needed. Driver model in
  66. particular needs this to operate, so that it can allocate the
  67. initial serial device and any others that are needed.
  68. config SYS_MALLOC_F_LEN
  69. hex "Size of malloc() pool before relocation"
  70. depends on SYS_MALLOC_F
  71. default 0x400
  72. help
  73. Before relocation, memory is very limited on many platforms. Still,
  74. we can provide a small malloc() pool if needed. Driver model in
  75. particular needs this to operate, so that it can allocate the
  76. initial serial device and any others that are needed.
  77. menuconfig EXPERT
  78. bool "Configure standard U-Boot features (expert users)"
  79. default y
  80. help
  81. This option allows certain base U-Boot options and settings
  82. to be disabled or tweaked. This is for specialized
  83. environments which can tolerate a "non-standard" U-Boot.
  84. Use this only if you really know what you are doing.
  85. if EXPERT
  86. config SYS_MALLOC_CLEAR_ON_INIT
  87. bool "Init with zeros the memory reserved for malloc (slow)"
  88. default y
  89. help
  90. This setting is enabled by default. The reserved malloc
  91. memory is initialized with zeros, so first malloc calls
  92. will return the pointer to the zeroed memory. But this
  93. slows the boot time.
  94. It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
  95. value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
  96. Then the boot time can be significantly reduced.
  97. Warning:
  98. When disabling this, please check if malloc calls, maybe
  99. should be replaced by calloc - if one expects zeroed memory.
  100. endif
  101. endmenu # General setup
  102. menu "Boot images"
  103. config SUPPORT_SPL
  104. bool
  105. config SUPPORT_TPL
  106. bool
  107. config SPL
  108. bool
  109. depends on SUPPORT_SPL
  110. prompt "Enable SPL"
  111. help
  112. If you want to build SPL as well as the normal image, say Y.
  113. config SPL_SYS_MALLOC_SIMPLE
  114. bool
  115. depends on SPL
  116. prompt "Only use malloc_simple functions in the SPL"
  117. help
  118. Say Y here to only use the *_simple malloc functions from
  119. malloc_simple.c, rather then using the versions from dlmalloc.c;
  120. this will make the SPL binary smaller at the cost of more heap
  121. usage as the *_simple malloc functions do not re-use free-ed mem.
  122. config SPL_STACK_R
  123. depends on SPL
  124. bool "Enable SDRAM location for SPL stack"
  125. help
  126. SPL starts off execution in SRAM and thus typically has only a small
  127. stack available. Since SPL sets up DRAM while in its board_init_f()
  128. function, it is possible for the stack to move there before
  129. board_init_r() is reached. This option enables a special SDRAM
  130. location for the SPL stack. U-Boot SPL switches to this after
  131. board_init_f() completes, and before board_init_r() starts.
  132. config SPL_STACK_R_ADDR
  133. depends on SPL_STACK_R
  134. hex "SDRAM location for SPL stack"
  135. help
  136. Specify the address in SDRAM for the SPL stack. This will be set up
  137. before board_init_r() is called.
  138. config SPL_STACK_R_MALLOC_SIMPLE_LEN
  139. depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
  140. hex "Size of malloc_simple heap after switching to DRAM SPL stack"
  141. default 0x100000
  142. help
  143. Specify the amount of the stack to use as memory pool for
  144. malloc_simple after switching the stack to DRAM. This may be set
  145. to give board_init_r() a larger heap then the initial heap in
  146. SRAM which is limited to SYS_MALLOC_F_LEN bytes.
  147. config SPL_SEPARATE_BSS
  148. depends on SPL
  149. bool "BSS section is in a different memory region from text"
  150. help
  151. Some platforms need a large BSS region in SPL and can provide this
  152. because RAM is already set up. In this case BSS can be moved to RAM.
  153. This option should then be enabled so that the correct device tree
  154. location is used. Normally we put the device tree at the end of BSS
  155. but with this option enabled, it goes at _image_binary_end.
  156. config TPL
  157. bool
  158. depends on SPL && SUPPORT_TPL
  159. prompt "Enable TPL"
  160. help
  161. If you want to build TPL as well as the normal image and SPL, say Y.
  162. config FIT
  163. bool "Support Flattened Image Tree"
  164. help
  165. This option allows to boot the new uImage structrure,
  166. Flattened Image Tree. FIT is formally a FDT, which can include
  167. images of various types (kernel, FDT blob, ramdisk, etc.)
  168. in a single blob. To boot this new uImage structure,
  169. pass the address of the blob to the "bootm" command.
  170. FIT is very flexible, supporting compression, multiple images,
  171. multiple configurations, verification through hashing and also
  172. verified boot (secure boot using RSA). This option enables that
  173. feature.
  174. config SPL_FIT
  175. bool "Support Flattened Image Tree within SPL"
  176. depends on FIT
  177. depends on SPL
  178. config FIT_VERBOSE
  179. bool "Display verbose messages on FIT boot"
  180. depends on FIT
  181. config FIT_SIGNATURE
  182. bool "Enable signature verification of FIT uImages"
  183. depends on FIT
  184. depends on DM
  185. select RSA
  186. help
  187. This option enables signature verification of FIT uImages,
  188. using a hash signed and verified using RSA. If
  189. CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
  190. hashing is available using hardware, then then RSA library will use
  191. it. See doc/uImage.FIT/signature.txt for more details.
  192. WARNING: When relying on signed FIT images with a required signature
  193. check the legacy image format is disabled by default, so that
  194. unsigned images cannot be loaded. If a board needs the legacy image
  195. format support in this case, enable it using
  196. CONFIG_IMAGE_FORMAT_LEGACY.
  197. config SPL_FIT_SIGNATURE
  198. bool "Enable signature verification of FIT firmware within SPL"
  199. depends on SPL_FIT
  200. depends on SPL_DM
  201. select SPL_RSA
  202. config FIT_BEST_MATCH
  203. bool "Select the best match for the kernel device tree"
  204. depends on FIT
  205. help
  206. When no configuration is explicitly selected, default to the
  207. one whose fdt's compatibility field best matches that of
  208. U-Boot itself. A match is considered "best" if it matches the
  209. most specific compatibility entry of U-Boot's fdt's root node.
  210. The order of entries in the configuration's fdt is ignored.
  211. config FIT_VERBOSE
  212. bool "Show verbose messages when FIT images fails"
  213. depends on FIT
  214. help
  215. Generally a system will have valid FIT images so debug messages
  216. are a waste of code space. If you are debugging your images then
  217. you can enable this option to get more verbose information about
  218. failures.
  219. config OF_BOARD_SETUP
  220. bool "Set up board-specific details in device tree before boot"
  221. depends on OF_LIBFDT
  222. help
  223. This causes U-Boot to call ft_board_setup() before booting into
  224. the Operating System. This function can set up various
  225. board-specific information in the device tree for use by the OS.
  226. The device tree is then passed to the OS.
  227. config OF_SYSTEM_SETUP
  228. bool "Set up system-specific details in device tree before boot"
  229. depends on OF_LIBFDT
  230. help
  231. This causes U-Boot to call ft_system_setup() before booting into
  232. the Operating System. This function can set up various
  233. system-specific information in the device tree for use by the OS.
  234. The device tree is then passed to the OS.
  235. config OF_STDOUT_VIA_ALIAS
  236. bool "Update the device-tree stdout alias from U-Boot"
  237. depends on OF_LIBFDT
  238. help
  239. This uses U-Boot's serial alias from the aliases node to update
  240. the device tree passed to the OS. The "linux,stdout-path" property
  241. in the chosen node is set to point to the correct serial node.
  242. This option currently references CONFIG_CONS_INDEX, which is
  243. incorrect when used with device tree as this option does not
  244. exist / should not be used.
  245. config SYS_EXTRA_OPTIONS
  246. string "Extra Options (DEPRECATED)"
  247. help
  248. The old configuration infrastructure (= mkconfig + boards.cfg)
  249. provided the extra options field. If you have something like
  250. "HAS_BAR,BAZ=64", the optional options
  251. #define CONFIG_HAS
  252. #define CONFIG_BAZ 64
  253. will be defined in include/config.h.
  254. This option was prepared for the smooth migration from the old
  255. configuration to Kconfig. Since this option will be removed sometime,
  256. new boards should not use this option.
  257. config SYS_TEXT_BASE
  258. depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
  259. (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
  260. depends on !EFI_APP
  261. hex "Text Base"
  262. help
  263. TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
  264. config SPL_LOAD_FIT
  265. bool "Enable SPL loading U-Boot as a FIT"
  266. depends on FIT
  267. help
  268. Normally with the SPL framework a legacy image is generated as part
  269. of the build. This contains U-Boot along with information as to
  270. where it should be loaded. This option instead enables generation
  271. of a FIT (Flat Image Tree) which provides more flexibility. In
  272. particular it can handle selecting from multiple device tree
  273. and passing the correct one to U-Boot.
  274. config SYS_CLK_FREQ
  275. depends on ARC || ARCH_SUNXI
  276. int "CPU clock frequency"
  277. help
  278. TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
  279. endmenu # Boot images
  280. source "common/Kconfig"
  281. source "cmd/Kconfig"
  282. source "dts/Kconfig"
  283. source "net/Kconfig"
  284. source "drivers/Kconfig"
  285. source "fs/Kconfig"
  286. source "lib/Kconfig"
  287. source "test/Kconfig"