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"
221 depends on SYS_MALLOC_F && SPL
222 default 0x2800 if RCAR_GEN3
223 default SYS_MALLOC_F_LEN
224 help
225 In SPL 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
230 It is possible to enable CONFIG_SYS_SPL_MALLOC_START to start a new
231 malloc() region in SDRAM once it is inited.
232
233config TPL_SYS_MALLOC_F_LEN
234 hex "Size of malloc() pool in TPL"
235 depends on SYS_MALLOC_F && TPL
236 default SPL_SYS_MALLOC_F_LEN
237 help
238 In TPL memory is very limited on many platforms. Still,
239 we can provide a small malloc() pool if needed. Driver model in
240 particular needs this to operate, so that it can allocate the
241 initial serial device and any others that are needed.
242
243menuconfig EXPERT
244 bool "Configure standard U-Boot features (expert users)"
245 default y
246 help
247 This option allows certain base U-Boot options and settings
248 to be disabled or tweaked. This is for specialized
249 environments which can tolerate a "non-standard" U-Boot.
250 Use this only if you really know what you are doing.
251
252if EXPERT
253 config SYS_MALLOC_CLEAR_ON_INIT
254 bool "Init with zeros the memory reserved for malloc (slow)"
255 default y
256 help
257 This setting is enabled by default. The reserved malloc
258 memory is initialized with zeros, so first malloc calls
259 will return the pointer to the zeroed memory. But this
260 slows the boot time.
261
262 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
263 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
264 Then the boot time can be significantly reduced.
265 Warning:
266 When disabling this, please check if malloc calls, maybe
267 should be replaced by calloc - if one expects zeroed memory.
268
269config SYS_MALLOC_DEFAULT_TO_INIT
270 bool "Default malloc to init while reserving the memory for it"
271 default n
272 help
273 It may happen that one needs to move the dynamic allocation
274 from one to another memory range, eg. when moving the malloc
275 from the limited static to a potentially large dynamic (DDR)
276 memory.
277
278 If so then on top of setting the updated memory aside one
279 needs to bring the malloc init.
280
281 If such a scenario is sought choose yes.
282
283config TOOLS_DEBUG
284 bool "Enable debug information for tools"
285 help
286 Enable generation of debug information for tools such as mkimage.
287 This can be used for debugging purposes. With debug information
288 it is possible to set breakpoints on particular lines, single-step
289 debug through the source code, etc.
290
291endif
292
293config PHYS_64BIT
294 bool "64bit physical address support"
295 help
296 Say Y here to support 64bit physical memory address.
297 This can be used not only for 64bit SoCs, but also for
298 large physical address extension on 32bit SoCs.
299
300config HAS_ROM
301 bool
302 select BINMAN
303 help
304 Enables building of a u-boot.rom target. This collects U-Boot and
305 any necessary binary blobs.
306
307config ROM_NEEDS_BLOBS
308 bool
309 depends on HAS_ROM
310 help
311 Enable this if building the u-boot.rom target needs binary blobs, and
312 so cannot be done normally. In this case, U-Boot will only build the
313 ROM if the required blobs exist. If not, you will see an warning like:
314
315 Image 'main-section' is missing external blobs and is non-functional:
316 intel-descriptor intel-me intel-refcode intel-vga intel-mrc
317
318config BUILD_ROM
319 bool "Build U-Boot as BIOS replacement"
320 depends on HAS_ROM
321 default y if !ROM_NEEDS_BLOBS
322 help
323 This option allows to build a ROM version of U-Boot.
324 The build process generally requires several binary blobs
325 which are not shipped in the U-Boot source tree.
326 Please, see doc/arch/x86.rst for details.
327
328config SPL_IMAGE
329 string "SPL image used in the combined SPL+U-Boot image"
330 default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
331 default "spl/u-boot-spl.bin"
332 depends on SPL
333 help
334 Select the SPL build target that shall be generated by the SPL
335 build process (default spl/u-boot-spl.bin). This image will be
336 used to generate a combined image with SPL and main U-Boot
337 proper as one single image.
338
339config BUILD_TARGET
340 string "Build target special images"
341 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
342 default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
343 default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
344 default "u-boot-elf.srec" if RCAR_GEN3
345 default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
346 ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
347 default "u-boot.kwb" if ARCH_KIRKWOOD
348 default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
349 default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
350 help
351 Some SoCs need special image types (e.g. U-Boot binary
352 with a special header) as build targets. By defining
353 CONFIG_BUILD_TARGET in the SoC / board header, this
354 special image will be automatically built upon calling
355 make / buildman.
356
357config SYS_CUSTOM_LDSCRIPT
358 bool "Use a custom location for the U-Boot linker script"
359 help
360 Normally when linking U-Boot we will look in the board directory,
361 the CPU directory and finally the "cpu" directory of the architecture
362 for the ile "u-boot.lds" and use that as our linker. However, in
363 some cases we need to provide a different linker script. To do so,
364 enable this option and then provide the location under
365 CONFIG_SYS_LDSCRIPT.
366
367config SYS_LDSCRIPT
368 depends on SYS_CUSTOM_LDSCRIPT
369 string "Custom ldscript location"
370 help
371 Path within the source tree to the linker script to use for the
372 main U-Boot binary.
373
374config ERR_PTR_OFFSET
375 hex
376 default 0x0
377 help
378 Some U-Boot pointers have redundant information, so we can use a
379 scheme where we can return either an error code or a pointer with the
380 same return value. The default implementation just casts the pointer
381 to a number, however, this may fail on platforms where the end of the
382 address range is used for valid pointers (e.g. 0xffffff00 is a valid
383 heap pointer in socfpga SPL).
384 For such platforms, this value provides an upper range of those error
385 pointer values - up to 'MAX_ERRNO' bytes below this value must be
386 unused/invalid addresses.
387
388config PLATFORM_ELFENTRY
389 string
390 default "__start" if MIPS
391 default "_start"
392
393config STACK_SIZE
394 hex "Define max stack size that can be used by U-Boot"
395 default 0x4000000 if ARCH_VERSAL || ARCH_ZYNQMP
396 default 0x200000 if MICROBLAZE
397 default 0x1000000
398 help
399 Define Max stack size that can be used by U-Boot. This value is used
400 by the UEFI sub-system. On some boards initrd_high is calculated as
401 base stack pointer minus this stack size.
402
403config SYS_HAS_SRAM
404 bool
405 default y if TARGET_PIC32MZDASK
406 default y if TARGET_DEVKIT8000
407 default y if TARGET_TRICORDER
408 default n
409 help
410 Enable this to allow support for the on board SRAM.
411 SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
412 SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
413
414config SYS_SRAM_BASE
415 hex
416 default 0x80000000 if TARGET_PIC32MZDASK
417 default 0x40200000 if TARGET_DEVKIT8000
418 default 0x40200000 if TARGET_TRICORDER
419 default 0x0
420
421config SYS_SRAM_SIZE
422 hex
423 default 0x00080000 if TARGET_PIC32MZDASK
424 default 0x10000 if TARGET_DEVKIT8000
425 default 0x10000 if TARGET_TRICORDER
426 default 0x0
427
428config EXAMPLES
429 bool "Compile API examples"
430 depends on !SANDBOX
431 default y if ARCH_QEMU
432 help
433 U-Boot provides an API for standalone applications. Examples are
434 provided in directory examples/.
435
436endmenu
437
438source "api/Kconfig"
439
440source "common/Kconfig"
441
442source "cmd/Kconfig"
443
444source "disk/Kconfig"
445
446source "dts/Kconfig"
447
448source "env/Kconfig"
449
450source "net/Kconfig"
451
452source "drivers/Kconfig"
453
454source "fs/Kconfig"
455
456source "lib/Kconfig"
457
458source "test/Kconfig"
459
460source "tools/Kconfig"
461
