mmc: omap_hsmmc: make it possible to compile out ADMA support
[people/ms/u-boot.git] / Kconfig
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1#
2# For a description of the syntax of this configuration file,
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3# see the file Documentation/kbuild/kconfig-language.txt in the
4# Linux kernel source tree.
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5#
6mainmenu "U-Boot $UBOOTVERSION Configuration"
7
8config UBOOTVERSION
9 string
10 option env="UBOOTVERSION"
11
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12# Allow defaults in arch-specific code to override any given here
13source "arch/Kconfig"
14
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15menu "General setup"
16
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17config BROKEN
18 bool
19 help
20 This option cannot be enabled. It is used as dependency
21 for broken and incomplete features.
22
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23config LOCALVERSION
24 string "Local version - append to U-Boot release"
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25 help
26 Append an extra string to the end of your U-Boot version.
59d7c34b 27 This will show up in your boot log, for example.
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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
33config LOCALVERSION_AUTO
34 bool "Automatically append version information to the version string"
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35 default y
36 help
37 This will try to automatically determine if the current tree is a
59d7c34b 38 release tree by looking for Git tags that belong to the current
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39 top of tree revision.
40
41 A string of the format -gxxxxxxxx will be added to the localversion
59d7c34b 42 if a Git-based tree is found. The string generated by this will be
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43 appended after any matching localversion* files, and after the value
44 set in CONFIG_LOCALVERSION.
45
46 (The actual string used here is the first eight characters produced
47 by running the command:
48
49 $ git rev-parse --verify HEAD
50
51 which is done within the script "scripts/setlocalversion".)
52
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53config CC_OPTIMIZE_FOR_SIZE
54 bool "Optimize for size"
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55 default y
56 help
57 Enabling this option will pass "-Os" instead of "-O2" to gcc
58 resulting in a smaller U-Boot image.
59
60 This option is enabled by default for U-Boot.
61
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62config DISTRO_DEFAULTS
63 bool "Select defaults suitable for booting general purpose Linux distributions"
3337e3af 64 default y if ARCH_SUNXI || TEGRA
b99ebaf9 65 default y if ARCH_LS2080A
70b8bd7d 66 default y if ARCH_MESON
7bdedf11 67 default y if ARCH_ROCKCHIP
9f823615 68 default n
b6251db8 69 imply USE_BOOTCOMMAND
a391d500 70 select CMD_BOOTZ if ARM && !ARM64
26959271 71 select CMD_BOOTI if ARM64
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72 select CMD_DHCP if NET
73 select CMD_PXE if NET
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74 select CMD_EXT2
75 select CMD_EXT4
76 select CMD_FAT
77 select CMD_FS_GENERIC
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78 select CMD_MII if NET
79 select CMD_PING if NET
b331cd62 80 select CMD_PART
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81 select HUSH_PARSER
82 help
83 Select this to enable various options and commands which are suitable
84 for building u-boot for booting general purpose Linux distributions.
85
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86config SYS_BOOT_GET_CMDLINE
87 bool "Enable kernel command line setup"
88 help
89 Enables allocating and saving kernel cmdline in space between
90 "bootm_low" and "bootm_low" + BOOTMAPSZ.
91
92config SYS_BOOT_GET_KBD
93 bool "Enable kernel board information setup"
94 help
95 Enables allocating and saving a kernel copy of the bd_info in
96 space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
97
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98config SYS_MALLOC_F
99 bool "Enable malloc() pool before relocation"
326a6823 100 default y if DM
b724bd7d 101 help
59d7c34b 102 Before relocation, memory is very limited on many platforms. Still,
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103 we can provide a small malloc() pool if needed. Driver model in
104 particular needs this to operate, so that it can allocate the
105 initial serial device and any others that are needed.
106
107config SYS_MALLOC_F_LEN
108 hex "Size of malloc() pool before relocation"
109 depends on SYS_MALLOC_F
110 default 0x400
111 help
59d7c34b 112 Before relocation, memory is very limited on many platforms. Still,
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113 we can provide a small malloc() pool if needed. Driver model in
114 particular needs this to operate, so that it can allocate the
115 initial serial device and any others that are needed.
116
f1896c45 117config SPL_SYS_MALLOC_F_LEN
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118 hex "Size of malloc() pool in SPL before relocation"
119 depends on SYS_MALLOC_F
120 default SYS_MALLOC_F_LEN
121 help
122 Before relocation, memory is very limited on many platforms. Still,
123 we can provide a small malloc() pool if needed. Driver model in
124 particular needs this to operate, so that it can allocate the
125 initial serial device and any others that are needed.
126
127config TPL_SYS_MALLOC_F_LEN
128 hex "Size of malloc() pool in TPL before relocation"
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129 depends on SYS_MALLOC_F
130 default SYS_MALLOC_F_LEN
131 help
132 Before relocation, memory is very limited on many platforms. Still,
133 we can provide a small malloc() pool if needed. Driver model in
134 particular needs this to operate, so that it can allocate the
135 initial serial device and any others that are needed.
136
1bf0979f 137menuconfig EXPERT
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138 bool "Configure standard U-Boot features (expert users)"
139 default y
140 help
141 This option allows certain base U-Boot options and settings
142 to be disabled or tweaked. This is for specialized
143 environments which can tolerate a "non-standard" U-Boot.
59d7c34b 144 Use this only if you really know what you are doing.
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145
146if EXPERT
147 config SYS_MALLOC_CLEAR_ON_INIT
148 bool "Init with zeros the memory reserved for malloc (slow)"
149 default y
150 help
151 This setting is enabled by default. The reserved malloc
152 memory is initialized with zeros, so first malloc calls
153 will return the pointer to the zeroed memory. But this
154 slows the boot time.
155
156 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
157 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
158 Then the boot time can be significantly reduced.
159 Warning:
160 When disabling this, please check if malloc calls, maybe
59d7c34b 161 should be replaced by calloc - if one expects zeroed memory.
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162
163config TOOLS_DEBUG
164 bool "Enable debug information for tools"
165 help
166 Enable generation of debug information for tools such as mkimage.
167 This can be used for debugging purposes. With debug information
168 it is possible to set breakpoints on particular lines, single-step
169 debug through the source code, etc.
170
266aa86b 171endif # EXPERT
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172
173config PHYS_64BIT
174 bool "64bit physical address support"
175 help
176 Say Y here to support 64bit physical memory address.
177 This can be used not only for 64bit SoCs, but also for
178 large physical address extention on 32bit SoCs.
179
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180config BUILD_ROM
181 bool "Build U-Boot as BIOS replacement"
182 depends on X86
183 help
184 This option allows to build a ROM version of U-Boot.
185 The build process generally requires several binary blobs
186 which are not shipped in the U-Boot source tree.
187 Please, see doc/README.x86 for details.
188
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189endmenu # General setup
190
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191menu "Boot images"
192
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193config ANDROID_BOOT_IMAGE
194 bool "Enable support for Android Boot Images"
195 default y if FASTBOOT
196 help
197 This enables support for booting images which use the Android
198 image format header.
199
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200config FIT
201 bool "Support Flattened Image Tree"
aeb9c53c 202 select MD5
089df18b 203 select SHA1
b6cf4439 204 help
266aa86b 205 This option allows you to boot the new uImage structure,
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206 Flattened Image Tree. FIT is formally a FDT, which can include
207 images of various types (kernel, FDT blob, ramdisk, etc.)
208 in a single blob. To boot this new uImage structure,
1f9ac4a4 209 pass the address of the blob to the "bootm" command.
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210 FIT is very flexible, supporting compression, multiple images,
211 multiple configurations, verification through hashing and also
266aa86b 212 verified boot (secure boot using RSA).
b6cf4439 213
266aa86b 214if FIT
b6cf4439 215
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216config FIT_ENABLE_SHA256_SUPPORT
217 bool "Support SHA256 checksum of FIT image contents"
089df18b 218 select SHA256
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219 default y
220 help
221 Enable this to support SHA256 checksum of FIT image contents. A
222 SHA256 checksum is a 256-bit (32-byte) hash value used to check that
223 the image contents have not been corrupted. SHA256 is recommended
224 for use in secure applications since (as at 2016) there is no known
225 feasible attack that could produce a 'collision' with differing
226 input data. Use this for the highest security. Note that only the
227 SHA256 variant is supported: SHA512 and others are not currently
228 supported in U-Boot.
229
b6cf4439 230config FIT_SIGNATURE
c4beb22f 231 bool "Enable signature verification of FIT uImages"
9009798d 232 depends on DM
c4beb22f 233 select RSA
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234 help
235 This option enables signature verification of FIT uImages,
94e3c8c4 236 using a hash signed and verified using RSA. If
237 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
266aa86b 238 hashing is available using hardware, then the RSA library will use
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239 it. See doc/uImage.FIT/signature.txt for more details.
240
241 WARNING: When relying on signed FIT images with a required signature
242 check the legacy image format is disabled by default, so that
243 unsigned images cannot be loaded. If a board needs the legacy image
244 format support in this case, enable it using
245 CONFIG_IMAGE_FORMAT_LEGACY.
246
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247config FIT_VERBOSE
248 bool "Show verbose messages when FIT images fail"
249 help
250 Generally a system will have valid FIT images so debug messages
251 are a waste of code space. If you are debugging your images then
252 you can enable this option to get more verbose information about
253 failures.
51c14cd1 254
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255config FIT_BEST_MATCH
256 bool "Select the best match for the kernel device tree"
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257 help
258 When no configuration is explicitly selected, default to the
259 one whose fdt's compatibility field best matches that of
260 U-Boot itself. A match is considered "best" if it matches the
261 most specific compatibility entry of U-Boot's fdt's root node.
262 The order of entries in the configuration's fdt is ignored.
263
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264config FIT_IMAGE_POST_PROCESS
265 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
266 depends on TI_SECURE_DEVICE
73223f0e 267 help
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268 Allows doing any sort of manipulation to blobs after they got extracted
269 from FIT images like stripping off headers or modifying the size of the
270 blob, verification, authentication, decryption etc. in a platform or
271 board specific way. In order to use this feature a platform or board-
272 specific implementation of board_fit_image_post_process() must be
273 provided. Also, anything done during this post-processing step would
274 need to be comprehended in how the images were prepared before being
275 injected into the FIT creation (i.e. the blobs would have been pre-
276 processed before being added to the FIT image).
277
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278if SPL
279
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280config SPL_FIT
281 bool "Support Flattened Image Tree within SPL"
282 depends on SPL
85c07a5a 283 select SPL_OF_LIBFDT
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284
285config SPL_FIT_SIGNATURE
286 bool "Enable signature verification of FIT firmware within SPL"
266aa86b 287 depends on SPL_DM
85c07a5a 288 select SPL_FIT
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289 select SPL_RSA
290
291config SPL_LOAD_FIT
292 bool "Enable SPL loading U-Boot as a FIT"
85c07a5a 293 select SPL_FIT
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294 help
295 Normally with the SPL framework a legacy image is generated as part
296 of the build. This contains U-Boot along with information as to
297 where it should be loaded. This option instead enables generation
298 of a FIT (Flat Image Tree) which provides more flexibility. In
299 particular it can handle selecting from multiple device tree
300 and passing the correct one to U-Boot.
301
302config SPL_FIT_IMAGE_POST_PROCESS
303 bool "Enable post-processing of FIT artifacts after loading by the SPL"
c12d8b7d 304 depends on SPL_LOAD_FIT
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305 help
306 Allows doing any sort of manipulation to blobs after they got extracted
307 from the U-Boot FIT image like stripping off headers or modifying the
308 size of the blob, verification, authentication, decryption etc. in a
309 platform or board specific way. In order to use this feature a platform
310 or board-specific implementation of board_fit_image_post_process() must
311 be provided. Also, anything done during this post-processing step would
312 need to be comprehended in how the images were prepared before being
313 injected into the FIT creation (i.e. the blobs would have been pre-
314 processed before being added to the FIT image).
315
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316config SPL_FIT_SOURCE
317 string ".its source file for U-Boot FIT image"
318 depends on SPL_FIT
319 help
320 Specifies a (platform specific) FIT source file to generate the
321 U-Boot FIT image. This could specify further image to load and/or
322 execute.
323
324config SPL_FIT_GENERATOR
325 string ".its file generator script for U-Boot FIT image"
326 depends on SPL_FIT
d29adf8e 327 default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
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328 help
329 Specifies a (platform specific) script file to generate the FIT
330 source file used to build the U-Boot FIT image file. This gets
331 passed a list of supported device tree file stub names to
332 include in the generated image.
333
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334endif # SPL
335
266aa86b 336endif # FIT
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337
338config OF_BOARD_SETUP
339 bool "Set up board-specific details in device tree before boot"
340 depends on OF_LIBFDT
341 help
342 This causes U-Boot to call ft_board_setup() before booting into
343 the Operating System. This function can set up various
344 board-specific information in the device tree for use by the OS.
345 The device tree is then passed to the OS.
346
347config OF_SYSTEM_SETUP
348 bool "Set up system-specific details in device tree before boot"
349 depends on OF_LIBFDT
350 help
351 This causes U-Boot to call ft_system_setup() before booting into
352 the Operating System. This function can set up various
353 system-specific information in the device tree for use by the OS.
354 The device tree is then passed to the OS.
355
356config OF_STDOUT_VIA_ALIAS
357 bool "Update the device-tree stdout alias from U-Boot"
358 depends on OF_LIBFDT
359 help
360 This uses U-Boot's serial alias from the aliases node to update
361 the device tree passed to the OS. The "linux,stdout-path" property
362 in the chosen node is set to point to the correct serial node.
363 This option currently references CONFIG_CONS_INDEX, which is
364 incorrect when used with device tree as this option does not
365 exist / should not be used.
b6cf4439 366
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367config SYS_EXTRA_OPTIONS
368 string "Extra Options (DEPRECATED)"
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369 help
370 The old configuration infrastructure (= mkconfig + boards.cfg)
ed36323f 371 provided the extra options field. If you have something like
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372 "HAS_BAR,BAZ=64", the optional options
373 #define CONFIG_HAS
374 #define CONFIG_BAZ 64
375 will be defined in include/config.h.
376 This option was prepared for the smooth migration from the old
377 configuration to Kconfig. Since this option will be removed sometime,
378 new boards should not use this option.
379
7f7563ce 380config SYS_TEXT_BASE
278b90ce 381 depends on !NIOS2 && !XTENSA
484cce0d 382 depends on !EFI_APP
278b90ce 383 default 0x80800000 if ARCH_OMAP2PLUS
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384 hex "Text Base"
385 help
278b90ce 386 The address in memory that U-Boot will be running from, initially.
7f7563ce 387
7e0ed13f 388
eba3fbd6 389
33d88183 390config SYS_CLK_FREQ
e71b422b 391 depends on ARC || ARCH_SUNXI
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392 int "CPU clock frequency"
393 help
394 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
395
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396config ARCH_FIXUP_FDT_MEMORY
397 bool "Enable arch_fixup_memory_banks() call"
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398 default y
399 help
400 Enable FDT memory map syncup before OS boot. This feature can be
401 used for booting OS with different memory setup where the part of
402 the memory location should be used for different purpose.
403
e91c3c33 404endmenu # Boot images
51631259 405
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406source "api/Kconfig"
407
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408source "common/Kconfig"
409
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410source "cmd/Kconfig"
411
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412source "disk/Kconfig"
413
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414source "dts/Kconfig"
415
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416source "env/Kconfig"
417
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418source "net/Kconfig"
419
420source "drivers/Kconfig"
421
422source "fs/Kconfig"
423
424source "lib/Kconfig"
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425
426source "test/Kconfig"