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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 LOCALVERSION
18 string "Local version - append to U-Boot release"
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19 help
20 Append an extra string to the end of your U-Boot version.
59d7c34b 21 This will show up in your boot log, for example.
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22 The string you set here will be appended after the contents of
23 any files with a filename matching localversion* in your
24 object and source tree, in that order. Your total string can
25 be a maximum of 64 characters.
26
27config LOCALVERSION_AUTO
28 bool "Automatically append version information to the version string"
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29 default y
30 help
31 This will try to automatically determine if the current tree is a
59d7c34b 32 release tree by looking for Git tags that belong to the current
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33 top of tree revision.
34
35 A string of the format -gxxxxxxxx will be added to the localversion
59d7c34b 36 if a Git-based tree is found. The string generated by this will be
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37 appended after any matching localversion* files, and after the value
38 set in CONFIG_LOCALVERSION.
39
40 (The actual string used here is the first eight characters produced
41 by running the command:
42
43 $ git rev-parse --verify HEAD
44
45 which is done within the script "scripts/setlocalversion".)
46
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47config CC_OPTIMIZE_FOR_SIZE
48 bool "Optimize for size"
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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
54 This option is enabled by default for U-Boot.
55
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56config DISTRO_DEFAULTS
57 bool "Select defaults suitable for booting general purpose Linux distributions"
58 default y if ARCH_SUNXI
59 default n
60 select CMD_BOOTZ
61 select CMD_DHCP
62 select CMD_EXT2
63 select CMD_EXT4
64 select CMD_FAT
65 select CMD_FS_GENERIC
66 select CMD_MII
67 select CMD_PING
68 select HUSH_PARSER
69 help
70 Select this to enable various options and commands which are suitable
71 for building u-boot for booting general purpose Linux distributions.
72
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73config SYS_MALLOC_F
74 bool "Enable malloc() pool before relocation"
326a6823 75 default y if DM
b724bd7d 76 help
59d7c34b 77 Before relocation, memory is very limited on many platforms. Still,
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78 we can provide a small malloc() pool if needed. Driver model in
79 particular needs this to operate, so that it can allocate the
80 initial serial device and any others that are needed.
81
82config SYS_MALLOC_F_LEN
83 hex "Size of malloc() pool before relocation"
84 depends on SYS_MALLOC_F
85 default 0x400
86 help
59d7c34b 87 Before relocation, memory is very limited on many platforms. Still,
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88 we can provide a small malloc() pool if needed. Driver model in
89 particular needs this to operate, so that it can allocate the
90 initial serial device and any others that are needed.
91
1bf0979f 92menuconfig EXPERT
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93 bool "Configure standard U-Boot features (expert users)"
94 default y
95 help
96 This option allows certain base U-Boot options and settings
97 to be disabled or tweaked. This is for specialized
98 environments which can tolerate a "non-standard" U-Boot.
59d7c34b 99 Use this only if you really know what you are doing.
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100
101if EXPERT
102 config SYS_MALLOC_CLEAR_ON_INIT
103 bool "Init with zeros the memory reserved for malloc (slow)"
104 default y
105 help
106 This setting is enabled by default. The reserved malloc
107 memory is initialized with zeros, so first malloc calls
108 will return the pointer to the zeroed memory. But this
109 slows the boot time.
110
111 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
112 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
113 Then the boot time can be significantly reduced.
114 Warning:
115 When disabling this, please check if malloc calls, maybe
59d7c34b 116 should be replaced by calloc - if one expects zeroed memory.
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117
118config TOOLS_DEBUG
119 bool "Enable debug information for tools"
120 help
121 Enable generation of debug information for tools such as mkimage.
122 This can be used for debugging purposes. With debug information
123 it is possible to set breakpoints on particular lines, single-step
124 debug through the source code, etc.
125
0aa8a4ad 126endif
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127endmenu # General setup
128
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129menu "Boot images"
130
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131config SUPPORT_SPL
132 bool
133
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134config SUPPORT_TPL
135 bool
136
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137config SPL
138 bool
02627356 139 depends on SUPPORT_SPL
d648964f 140 prompt "Enable SPL"
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141 help
142 If you want to build SPL as well as the normal image, say Y.
143
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144config SPL_SYS_MALLOC_SIMPLE
145 bool
146 depends on SPL
59d7c34b 147 prompt "Only use malloc_simple functions in the SPL"
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148 help
149 Say Y here to only use the *_simple malloc functions from
59d7c34b 150 malloc_simple.c, rather then using the versions from dlmalloc.c;
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151 this will make the SPL binary smaller at the cost of more heap
152 usage as the *_simple malloc functions do not re-use free-ed mem.
153
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154config SPL_STACK_R
155 depends on SPL
156 bool "Enable SDRAM location for SPL stack"
157 help
158 SPL starts off execution in SRAM and thus typically has only a small
159 stack available. Since SPL sets up DRAM while in its board_init_f()
160 function, it is possible for the stack to move there before
161 board_init_r() is reached. This option enables a special SDRAM
162 location for the SPL stack. U-Boot SPL switches to this after
163 board_init_f() completes, and before board_init_r() starts.
164
165config SPL_STACK_R_ADDR
166 depends on SPL_STACK_R
167 hex "SDRAM location for SPL stack"
168 help
169 Specify the address in SDRAM for the SPL stack. This will be set up
170 before board_init_r() is called.
171
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172config SPL_STACK_R_MALLOC_SIMPLE_LEN
173 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
174 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
175 default 0x100000
176 help
177 Specify the amount of the stack to use as memory pool for
178 malloc_simple after switching the stack to DRAM. This may be set
179 to give board_init_r() a larger heap then the initial heap in
180 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
181
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182config SPL_SEPARATE_BSS
183 depends on SPL
184 bool "BSS section is in a different memory region from text"
185 help
186 Some platforms need a large BSS region in SPL and can provide this
187 because RAM is already set up. In this case BSS can be moved to RAM.
188 This option should then be enabled so that the correct device tree
189 location is used. Normally we put the device tree at the end of BSS
190 but with this option enabled, it goes at _image_binary_end.
191
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192config TPL
193 bool
cf6bbe4c 194 depends on SPL && SUPPORT_TPL
d648964f 195 prompt "Enable TPL"
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196 help
197 If you want to build TPL as well as the normal image and SPL, say Y.
198
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199config FIT
200 bool "Support Flattened Image Tree"
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201 help
202 This option allows to boot the new uImage structrure,
203 Flattened Image Tree. FIT is formally a FDT, which can include
204 images of various types (kernel, FDT blob, ramdisk, etc.)
205 in a single blob. To boot this new uImage structure,
1f9ac4a4 206 pass the address of the blob to the "bootm" command.
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207 FIT is very flexible, supporting compression, multiple images,
208 multiple configurations, verification through hashing and also
209 verified boot (secure boot using RSA). This option enables that
210 feature.
b6cf4439 211
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212config SPL_FIT
213 bool "Support Flattened Image Tree within SPL"
214 depends on FIT
215 depends on SPL
216
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217config FIT_VERBOSE
218 bool "Display verbose messages on FIT boot"
219 depends on FIT
220
221config FIT_SIGNATURE
c4beb22f 222 bool "Enable signature verification of FIT uImages"
b6cf4439 223 depends on FIT
9009798d 224 depends on DM
c4beb22f 225 select RSA
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226 help
227 This option enables signature verification of FIT uImages,
94e3c8c4 228 using a hash signed and verified using RSA. If
229 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
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230 hashing is available using hardware, then then RSA library will use
231 it. See doc/uImage.FIT/signature.txt for more details.
232
233 WARNING: When relying on signed FIT images with a required signature
234 check the legacy image format is disabled by default, so that
235 unsigned images cannot be loaded. If a board needs the legacy image
236 format support in this case, enable it using
237 CONFIG_IMAGE_FORMAT_LEGACY.
238
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239config SPL_FIT_SIGNATURE
240 bool "Enable signature verification of FIT firmware within SPL"
241 depends on SPL_FIT
242 depends on SPL_DM
243 select SPL_RSA
244
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245config FIT_BEST_MATCH
246 bool "Select the best match for the kernel device tree"
247 depends on FIT
248 help
249 When no configuration is explicitly selected, default to the
250 one whose fdt's compatibility field best matches that of
251 U-Boot itself. A match is considered "best" if it matches the
252 most specific compatibility entry of U-Boot's fdt's root node.
253 The order of entries in the configuration's fdt is ignored.
254
255config FIT_VERBOSE
256 bool "Show verbose messages when FIT images fails"
257 depends on FIT
258 help
259 Generally a system will have valid FIT images so debug messages
260 are a waste of code space. If you are debugging your images then
261 you can enable this option to get more verbose information about
262 failures.
263
264config OF_BOARD_SETUP
265 bool "Set up board-specific details in device tree before boot"
266 depends on OF_LIBFDT
267 help
268 This causes U-Boot to call ft_board_setup() before booting into
269 the Operating System. This function can set up various
270 board-specific information in the device tree for use by the OS.
271 The device tree is then passed to the OS.
272
273config OF_SYSTEM_SETUP
274 bool "Set up system-specific details in device tree before boot"
275 depends on OF_LIBFDT
276 help
277 This causes U-Boot to call ft_system_setup() before booting into
278 the Operating System. This function can set up various
279 system-specific information in the device tree for use by the OS.
280 The device tree is then passed to the OS.
281
282config OF_STDOUT_VIA_ALIAS
283 bool "Update the device-tree stdout alias from U-Boot"
284 depends on OF_LIBFDT
285 help
286 This uses U-Boot's serial alias from the aliases node to update
287 the device tree passed to the OS. The "linux,stdout-path" property
288 in the chosen node is set to point to the correct serial node.
289 This option currently references CONFIG_CONS_INDEX, which is
290 incorrect when used with device tree as this option does not
291 exist / should not be used.
b6cf4439 292
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293config SYS_EXTRA_OPTIONS
294 string "Extra Options (DEPRECATED)"
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295 help
296 The old configuration infrastructure (= mkconfig + boards.cfg)
ed36323f 297 provided the extra options field. If you have something like
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298 "HAS_BAR,BAZ=64", the optional options
299 #define CONFIG_HAS
300 #define CONFIG_BAZ 64
301 will be defined in include/config.h.
302 This option was prepared for the smooth migration from the old
303 configuration to Kconfig. Since this option will be removed sometime,
304 new boards should not use this option.
305
7f7563ce 306config SYS_TEXT_BASE
c6e18144 307 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
ec35e123 308 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
484cce0d 309 depends on !EFI_APP
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310 hex "Text Base"
311 help
312 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
313
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314config SPL_LOAD_FIT
315 bool "Enable SPL loading U-Boot as a FIT"
316 depends on FIT
317 help
318 Normally with the SPL framework a legacy image is generated as part
319 of the build. This contains U-Boot along with information as to
320 where it should be loaded. This option instead enables generation
321 of a FIT (Flat Image Tree) which provides more flexibility. In
322 particular it can handle selecting from multiple device tree
323 and passing the correct one to U-Boot.
324
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325config SPL_FIT_IMAGE_POST_PROCESS
326 bool "Enable post-processing of FIT artifacts after loading by the SPL"
327 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
328 help
329 Allows doing any sort of manipulation to blobs after they got extracted
330 from the U-Boot FIT image like stripping off headers or modifying the
331 size of the blob, verification, authentication, decryption etc. in a
332 platform or board specific way. In order to use this feature a platform
333 or board-specific implementation of board_fit_image_post_process() must
334 be provided. Also, anything done during this post-processing step would
335 need to be comprehended in how the images were prepared before being
336 injected into the FIT creation (i.e. the blobs would have been pre-
337 processed before being added to the FIT image).
338
33d88183 339config SYS_CLK_FREQ
e71b422b 340 depends on ARC || ARCH_SUNXI
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341 int "CPU clock frequency"
342 help
343 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
344
e91c3c33 345endmenu # Boot images
51631259 346
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347source "common/Kconfig"
348
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349source "cmd/Kconfig"
350
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351source "dts/Kconfig"
352
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353source "net/Kconfig"
354
355source "drivers/Kconfig"
356
357source "fs/Kconfig"
358
359source "lib/Kconfig"
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360
361source "test/Kconfig"