1
2
3
4
5
6mainmenu "U-Boot $(UBOOTVERSION) Configuration"
7
8comment "Compiler: $(CC_VERSION_TEXT)"
9
10source "scripts/Kconfig.include"
11
12
13source "arch/Kconfig"
14
15menu "General setup"
16
17config BROKEN
18 bool
19 help
20 This option cannot be enabled. It is used as dependency
21 for broken and incomplete features.
22
23config DEPRECATED
24 bool
25 help
26 This option cannot be enabled. It it used as a dependency for
27 code that relies on deprecated features that will be removed and
28 the conversion deadline has passed.
29
30config LOCALVERSION
31 string "Local version - append to U-Boot release"
32 help
33 Append an extra string to the end of your U-Boot version.
34 This will show up in your boot log, for example.
35 The string you set here will be appended after the contents of
36 any files with a filename matching localversion* in your
37 object and source tree, in that order. Your total string can
38 be a maximum of 64 characters.
39
40config LOCALVERSION_AUTO
41 bool "Automatically append version information to the version string"
42 default y
43 help
44 This will try to automatically determine if the current tree is a
45 release tree by looking for Git tags that belong to the current
46 top of tree revision.
47
48 A string of the format -gxxxxxxxx will be added to the localversion
49 if a Git-based tree is found. The string generated by this will be
50 appended after any matching localversion* files, and after the value
51 set in CONFIG_LOCALVERSION.
52
53 (The actual string used here is the first eight characters produced
54 by running the command:
55
56 $ git rev-parse --verify HEAD
57
58 which is done within the script "scripts/setlocalversion".)
59
60config CC_OPTIMIZE_FOR_SIZE
61 bool "Optimize for size"
62 default y
63 help
64 Enabling this option will pass "-Os" instead of "-O2" to gcc
65 resulting in a smaller U-Boot image.
66
67 This option is enabled by default for U-Boot.
68
69config OPTIMIZE_INLINING
70 bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
71 default n
72 help
73 This option determines if U-Boot forces gcc to inline the functions
74 developers have marked 'inline'. Doing so takes away freedom from gcc to
75 do what it thinks is best, which is desirable in some cases for size
76 reasons.
77
78config SPL_OPTIMIZE_INLINING
79 bool "Allow compiler to uninline functions marked 'inline' in SPL"
80 depends on SPL
81 default n
82 help
83 This option determines if U-Boot forces gcc to inline the functions
84 developers have marked 'inline'. Doing so takes away freedom from gcc to
85 do what it thinks is best, which is desirable in some cases for size
86 reasons.
87
88config TPL_OPTIMIZE_INLINING
89 bool "Allow compiler to uninline functions marked 'inline' in TPL"
90 depends on TPL
91 default n
92 help
93 This option determines if U-Boot forces gcc to inline the functions
94 developers have marked 'inline'. Doing so takes away freedom from gcc to
95 do what it thinks is best, which is desirable in some cases for size
96 reasons.
97
98config CC_COVERAGE
99 bool "Enable code coverage analysis"
100 depends on SANDBOX
101 help
102 Enabling this option will pass "--coverage" to gcc to compile
103 and link code instrumented for coverage analysis.
104
105config CC_HAS_ASM_INLINE
106 def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
107
108config XEN
109 bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
110 help
111 Enabling this option will make U-Boot be run as a bootloader
112 for XEN [1] Virtual Machine.
113
114 Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
115 for para-virtualization. Xen can organize the safe execution of several
116 virtual machines on the same physical system with performance close to
117 native. It is used as the basis for a number of different commercial and
118 open source applications, such as: server virtualization, Infrastructure
119 as a Service (IaaS), desktop virtualization, security applications,
120 embedded and hardware appliances.
121 Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
122 Xen to use the device drivers for the Domain-0 kernel by default.
123
124 [1] - https://xenproject.org/
125
126config DISTRO_DEFAULTS
127 bool "Select defaults suitable for booting general purpose Linux distributions"
128 select AUTO_COMPLETE
129 select CMDLINE_EDITING
130 select CMD_BOOTI if ARM64
131 select CMD_BOOTZ if ARM && !ARM64
132 select CMD_DHCP if CMD_NET
133 select CMD_ENV_EXISTS
134 select CMD_EXT2
135 select CMD_EXT4
136 select CMD_FAT
137 select CMD_FS_GENERIC
138 select CMD_PART if PARTITIONS
139 select CMD_PING if CMD_NET
140 select CMD_PXE if NET
141 select CMD_SYSBOOT
142 select ENV_VARS_UBOOT_CONFIG
143 select HUSH_PARSER
144 select SUPPORT_RAW_INITRD
145 select SYS_LONGHELP
146 imply CMD_MII if NET
147 imply USB_STORAGE
148 imply USE_BOOTCOMMAND
149 help
150 Select this to enable various options and commands which are suitable
151 for building u-boot for booting general purpose Linux distributions.
152
153config ENV_VARS_UBOOT_CONFIG
154 bool "Add arch, board, vendor and soc variables to default environment"
155 help
156 Define this in order to add variables describing the
157 U-Boot build configuration to the default environment.
158 These will be named arch, cpu, board, vendor, and soc.
159 Enabling this option will cause the following to be defined:
160 - CONFIG_SYS_ARCH
161 - CONFIG_SYS_CPU
162 - CONFIG_SYS_BOARD
163 - CONFIG_SYS_VENDOR
164 - CONFIG_SYS_SOC
165
166config 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
173config SYS_BOOT_GET_CMDLINE
174 bool "Enable kernel command line setup"
175 help
176 Enables allocating and saving kernel cmdline in space between
177 "bootm_low" and "bootm_low" + BOOTMAPSZ.
178
179config SYS_BOOT_GET_KBD
180 bool "Enable kernel board information setup"
181 help
182 Enables allocating and saving a kernel copy of the bd_info in
183 space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
184
185config SYS_MALLOC_F
186 bool "Enable malloc() pool before relocation"
187 default y if DM
188
189 help
190 Before relocation, memory is very limited on many platforms. Still,
191 we can provide a small malloc() pool if needed. Driver model in
192 particular needs this to operate, so that it can allocate the
193 initial serial device and any others that are needed.
194
195config SYS_MALLOC_F_LEN
196 hex "Size of malloc() pool before relocation"
197 depends on SYS_MALLOC_F
198 default 0x1000 if AM33XX
199 default 0x4000 if SANDBOX
200 default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
201 ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5 || \
202 ARCH_LS1012A || ARCH_LS1021A || ARCH_LS1043A || \
203 ARCH_LS1046A || ARCH_QEMU || ARCH_SUNXI || ARCH_OWL)
204 default 0x400
205 help
206 Before relocation, memory is very limited on many platforms. Still,
207 we can provide a small malloc() pool if needed. Driver model in
208 particular needs this to operate, so that it can allocate the
209 initial serial device and any others that are needed.
210
211config SYS_MALLOC_LEN
212 hex "Define memory for Dynamic allocation"
213 depends on ARCH_ZYNQ || ARCH_VERSAL || ARCH_STM32MP || ARCH_ROCKCHIP
214 default 0x2000000 if ARCH_ROCKCHIP
215 help
216 This defines memory to be allocated for Dynamic allocation
217 TODO: Use for other architectures
218
219config SPL_SYS_MALLOC_F_LEN
220 hex "Size of malloc() pool in SPL before relocation"
221 depends on SYS_MALLOC_F && SPL
222 default 0x2800 if RCAR_GEN3
223 default SYS_MALLOC_F_LEN
224 help
225 Before relocation, memory is very limited on many platforms. Still,
226 we can provide a small malloc() pool if needed. Driver model in
227 particular needs this to operate, so that it can allocate the
228 initial serial device and any others that are needed.
229
230config TPL_SYS_MALLOC_F_LEN
231 hex "Size of malloc() pool in TPL before relocation"
232 depends on SYS_MALLOC_F && TPL
233 default SYS_MALLOC_F_LEN
234 help
235 Before relocation, memory is very limited on many platforms. Still,
236 we can provide a small malloc() pool if needed. Driver model in
237 particular needs this to operate, so that it can allocate the
238 initial serial device and any others that are needed.
239
240menuconfig EXPERT
241 bool "Configure standard U-Boot features (expert users)"
242 default y
243 help
244 This option allows certain base U-Boot options and settings
245 to be disabled or tweaked. This is for specialized
246 environments which can tolerate a "non-standard" U-Boot.
247 Use this only if you really know what you are doing.
248
249if EXPERT
250 config SYS_MALLOC_CLEAR_ON_INIT
251 bool "Init with zeros the memory reserved for malloc (slow)"
252 default y
253 help
254 This setting is enabled by default. The reserved malloc
255 memory is initialized with zeros, so first malloc calls
256 will return the pointer to the zeroed memory. But this
257 slows the boot time.
258
259 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
260 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
261 Then the boot time can be significantly reduced.
262 Warning:
263 When disabling this, please check if malloc calls, maybe
264 should be replaced by calloc - if one expects zeroed memory.
265
266config SYS_MALLOC_DEFAULT_TO_INIT
267 bool "Default malloc to init while reserving the memory for it"
268 default n
269 help
270 It may happen that one needs to move the dynamic allocation
271 from one to another memory range, eg. when moving the malloc
272 from the limited static to a potentially large dynamic (DDR)
273 memory.
274
275 If so then on top of setting the updated memory aside one
276 needs to bring the malloc init.
277
278 If such a scenario is sought choose yes.
279
280config TOOLS_DEBUG
281 bool "Enable debug information for tools"
282 help
283 Enable generation of debug information for tools such as mkimage.
284 This can be used for debugging purposes. With debug information
285 it is possible to set breakpoints on particular lines, single-step
286 debug through the source code, etc.
287
288endif
289
290config PHYS_64BIT
291 bool "64bit physical address support"
292 help
293 Say Y here to support 64bit physical memory address.
294 This can be used not only for 64bit SoCs, but also for
295 large physical address extension on 32bit SoCs.
296
297config HAS_ROM
298 bool
299 select BINMAN
300 help
301 Enables building of a u-boot.rom target. This collects U-Boot and
302 any necessary binary blobs.
303
304config ROM_NEEDS_BLOBS
305 bool
306 depends on HAS_ROM
307 help
308 Enable this if building the u-boot.rom target needs binary blobs, and
309 so cannot be done normally. In this case, U-Boot will only build the
310 ROM if the required blobs exist. If not, you will see an warning like:
311
312 Image 'main-section' is missing external blobs and is non-functional:
313 intel-descriptor intel-me intel-refcode intel-vga intel-mrc
314
315config BUILD_ROM
316 bool "Build U-Boot as BIOS replacement"
317 depends on HAS_ROM
318 default y if !ROM_NEEDS_BLOBS
319 help
320 This option allows to build a ROM version of U-Boot.
321 The build process generally requires several binary blobs
322 which are not shipped in the U-Boot source tree.
323 Please, see doc/arch/x86.rst for details.
324
325config SPL_IMAGE
326 string "SPL image used in the combined SPL+U-Boot image"
327 default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
328 default "spl/u-boot-spl.bin"
329 depends on SPL
330 help
331 Select the SPL build target that shall be generated by the SPL
332 build process (default spl/u-boot-spl.bin). This image will be
333 used to generate a combined image with SPL and main U-Boot
334 proper as one single image.
335
336config BUILD_TARGET
337 string "Build target special images"
338 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
339 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
340 default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
341 default "u-boot-elf.srec" if RCAR_GEN3
342 default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
343 ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
344 default "u-boot.kwb" if ARCH_KIRKWOOD
345 default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
346 default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
347 help
348 Some SoCs need special image types (e.g. U-Boot binary
349 with a special header) as build targets. By defining
350 CONFIG_BUILD_TARGET in the SoC / board header, this
351 special image will be automatically built upon calling
352 make / buildman.
353
354config SYS_CUSTOM_LDSCRIPT
355 bool "Use a custom location for the U-Boot linker script"
356 help
357 Normally when linking U-Boot we will look in the board directory,
358 the CPU directory and finally the "cpu" directory of the architecture
359 for the ile "u-boot.lds" and use that as our linker. However, in
360 some cases we need to provide a different linker script. To do so,
361 enable this option and then provide the location under
362 CONFIG_SYS_LDSCRIPT.
363
364config SYS_LDSCRIPT
365 depends on SYS_CUSTOM_LDSCRIPT
366 string "Custom ldscript location"
367 help
368 Path within the source tree to the linker script to use for the
369 main U-Boot binary.
370
371config ERR_PTR_OFFSET
372 hex
373 default 0x0
374 help
375 Some U-Boot pointers have redundant information, so we can use a
376 scheme where we can return either an error code or a pointer with the
377 same return value. The default implementation just casts the pointer
378 to a number, however, this may fail on platforms where the end of the
379 address range is used for valid pointers (e.g. 0xffffff00 is a valid
380 heap pointer in socfpga SPL).
381 For such platforms, this value provides an upper range of those error
382 pointer values - up to 'MAX_ERRNO' bytes below this value must be
383 unused/invalid addresses.
384
385config PLATFORM_ELFENTRY
386 string
387 default "__start" if MIPS
388 default "_start"
389
390config STACK_SIZE
391 hex "Define max stack size that can be used by U-Boot"
392 default 0x4000000 if ARCH_VERSAL || ARCH_ZYNQMP
393 default 0x200000 if MICROBLAZE
394 default 0x1000000
395 help
396 Define Max stack size that can be used by U-Boot. This value is used
397 by the UEFI sub-system. On some boards initrd_high is calculated as
398 base stack pointer minus this stack size.
399
400config SYS_HAS_SRAM
401 bool
402 default y if TARGET_PIC32MZDASK
403 default y if TARGET_DEVKIT8000
404 default y if TARGET_TRICORDER
405 default n
406 help
407 Enable this to allow support for the on board SRAM.
408 SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
409 SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
410
411config SYS_SRAM_BASE
412 hex
413 default 0x80000000 if TARGET_PIC32MZDASK
414 default 0x40200000 if TARGET_DEVKIT8000
415 default 0x40200000 if TARGET_TRICORDER
416 default 0x0
417
418config SYS_SRAM_SIZE
419 hex
420 default 0x00080000 if TARGET_PIC32MZDASK
421 default 0x10000 if TARGET_DEVKIT8000
422 default 0x10000 if TARGET_TRICORDER
423 default 0x0
424
425config EXAMPLES
426 bool "Compile API examples"
427 depends on !SANDBOX
428 default y if ARCH_QEMU
429 help
430 U-Boot provides an API for standalone applications. Examples are
431 provided in directory examples/.
432
433endmenu
434
435source "api/Kconfig"
436
437source "common/Kconfig"
438
439source "cmd/Kconfig"
440
441source "disk/Kconfig"
442
443source "dts/Kconfig"
444
445source "env/Kconfig"
446
447source "net/Kconfig"
448
449source "drivers/Kconfig"
450
451source "fs/Kconfig"
452
453source "lib/Kconfig"
454
455source "test/Kconfig"
456
457source "tools/Kconfig"
458
