10 config SPL_DFU_NO_RESET
15 depends on SUPPORT_SPL
17 If you want to build SPL as well as the normal image, say Y.
19 menu "SPL configuration options"
23 bool "Support SPL based upon the common SPL framework"
26 Enable the SPL framework under common/spl/. This framework
27 supports MMC, NAND and YMODEM and other methods loading of U-Boot
28 and the Linux Kernel. If unsure, say Y.
30 config SPL_FRAMEWORK_BOARD_INIT_F
31 bool "Define a generic function board_init_f"
32 depends on SPL_FRAMEWORK
34 Define a generic function board_init_f that:
35 - initialize the spl (spl_early_init)
36 - initialize the serial (preloader_console_init)
37 Unless you want to provide your own board_init_f, you should say Y.
40 hex "Maximum size of SPL image"
41 default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
42 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
45 Specifies the maximum length of the U-Boot SPL image.
46 If this value is zero, it is ignored.
48 config SPL_SIZE_LIMIT_SUBTRACT_GD
49 bool "SPL image size check: provide space for global data"
50 depends on SPL_SIZE_LIMIT > 0
52 If enabled, aligned size of global data is reserved in
53 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
54 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
55 pre-reloc global data is put into this SRAM, too.
57 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
58 bool "SPL image size check: provide space for malloc() pool before relocation"
59 depends on SPL_SIZE_LIMIT > 0
61 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
62 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
63 describes the size of SRAM available for SPL when pre-reloc malloc
64 pool is put into this SRAM, too.
66 config SPL_SIZE_LIMIT_PROVIDE_STACK
67 hex "SPL image size check: provide stack space before relocation"
68 depends on SPL_SIZE_LIMIT > 0
71 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
72 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
73 of SRAM available for SPL when the stack required before reolcation
77 hex "Maximum size of the SPL image, excluding BSS"
78 default 0x30000 if ARCH_MX6 && MX6_OCRAM_256KB
79 default 0x1b000 if AM33XX && !TI_SECURE_DEVICE
80 default 0x10000 if ARCH_MX6 && !MX6_OCRAM_256KB
81 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x10000
82 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x20000 && !MACH_SUN50I_H616
83 default 0x7000 if RCAR_GEN3
84 default 0x5fa0 if SUNXI_SRAM_ADDRESS = 0x0
85 default 0x10000 if ASPEED_AST2600
88 Maximum size of the SPL image (text, data, rodata, and linker lists
89 sections), BSS excluded. When defined, the linker checks that the
90 actual size does not exceed it.
93 hex "Offset to which the SPL should be padded before appending the SPL payload"
94 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
95 default 0x11000 if ARCH_MX7 || (ARCH_MX6 && !MX6_OCRAM_256KB)
96 default 0x10000 if ARCH_KEYSTONE
97 default 0x8000 if ARCH_SUNXI && !MACH_SUN50I_H616
98 default TPL_MAX_SIZE if TPL_MAX_SIZE > SPL_MAX_SIZE
101 Image offset to which the SPL should be padded before appending the
102 SPL payload. By default, this is defined as CONFIG_SPL_MAX_SIZE, or 0 if
103 CONFIG_SPL_MAX_SIZE is undefined. CONFIG_SPL_PAD_TO must be either
104 0, meaning to append the SPL payload without any padding, or >=
107 config SPL_HAS_BSS_LINKER_SECTION
108 depends on SPL_FRAMEWORK
109 bool "Use a specific address for the BSS via the linker script"
110 default y if ARCH_SUNXI || ARCH_MX6 || ARCH_OMAP2PLUS || MIPS || RISCV
112 config SPL_BSS_START_ADDR
113 hex "Link address for the BSS within the SPL binary"
114 depends on SPL_HAS_BSS_LINKER_SECTION
115 default 0x88200000 if (ARCH_MX6 && (MX6SX || MX6SL || MX6UL || MX6ULL)) || ARCH_MX7
116 default 0x18200000 if ARCH_MX6 && !(MX6SX || MX6SL || MX6UL || MX6ULL)
117 default 0x80a00000 if ARCH_OMAP2PLUS
118 default 0x81f80000 if ARCH_SUNXI && MACH_SUNIV
119 default 0x4ff80000 if ARCH_SUNXI && !(MACH_SUN9I || MACH_SUNIV)
120 default 0x2ff80000 if ARCH_SUNXI && MACH_SUN9I
123 prompt "Enforce SPL BSS limit"
125 default SPL_BSS_LIMIT
127 In some platforms we only want to enforce a limit on the size of the
128 BSS in memory. On other platforms we need to enforce a limit on the
129 whole of the memory allocation as we're strictly limited to a small
130 typically non-DRAM location. Finally, other platforms do not enforce
131 a memory limit within SPL.
133 config SPL_NO_BSS_LIMIT
134 bool "Do not enforce a build time limit on the size of the BSS"
137 bool "Enforce a limit on the size of the BSS only"
139 config SPL_FOOTPRINT_LIMIT
140 bool "Enforce a limit on the whole of memory allocated to SPL, BSS included"
144 config SPL_BSS_MAX_SIZE
145 hex "Maximum size in memory allocated to the SPL BSS"
146 depends on SPL_BSS_LIMIT
147 default 0x100000 if ARCH_MX6 || RISCV
148 default 0x80000 if ARCH_OMAP2PLUS || ARCH_SUNXI
150 When non-zero, the linker checks that the actual memory used by SPL
151 from __bss_start to __bss_end does not exceed it.
153 config SPL_MAX_FOOTPRINT
154 hex "Maximum size in memory allocated to the SPL, BSS included"
155 depends on SPL_FOOTPRINT_LIMIT
157 When non-zero, the linker checks that the actual memory used by SPL
158 from _start to __bss_end does not exceed it.
160 config SPL_SYS_STACK_F_CHECK_BYTE
164 Constant used to check the stack
166 config SPL_SYS_REPORT_STACK_F_USAGE
167 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
168 bool "Check and report stack usage in SPL before relocation"
170 If this option is enabled, the initial SPL stack is filled with 0xaa
171 very early, up to the size configured with
172 SPL_SIZE_LIMIT_PROVIDE_STACK.
173 Later when SPL is done using this initial stack and switches to a
174 stack in DRAM, the actually used size of this initial stack is
175 reported by examining the memory and searching for the lowest
176 occurrence of non 0xaa bytes.
177 This default implementation works for stacks growing down only.
179 config SPL_SHOW_ERRORS
180 bool "Show more information when something goes wrong"
182 This enabled more verbose error messages and checking when something
183 goes wrong in SPL. For example, it shows the error code when U-Boot
184 cannot be located. This can help to diagnose the problem and figure
185 out a fix, particularly during development.
187 This adds a small amount to SPL code size, perhaps 100 bytes.
189 config SPL_BINMAN_SYMBOLS
190 bool "Declare binman symbols in SPL"
191 depends on SPL_FRAMEWORK && BINMAN
194 This enables use of symbols in SPL which refer to U-Boot, enabling SPL
195 to obtain the location of U-Boot simply by calling spl_get_image_pos()
196 and spl_get_image_size().
198 For this to work, you must have a U-Boot image in the binman image, so
199 binman can update SPL with the location of it.
201 source "common/spl/Kconfig.nxp"
204 bool "Pass hand-off information from SPL to U-Boot proper"
207 It is useful to be able to pass information from SPL to U-Boot
208 proper to preserve state that is known in SPL and is needed in U-Boot.
209 Enable this to locate the handoff information in U-Boot proper, early
210 in boot. It is available in gd->handoff. The state state is set up
211 in SPL (or TPL if that is being used).
214 bool "Pass hand-off information from SPL to U-Boot proper"
215 depends on HANDOFF && SPL_BLOBLIST
218 This option enables SPL to write handoff information. This can be
219 used to pass information like the size of SDRAM from SPL to U-Boot
220 proper. Also SPL can receive information from TPL in the same place
224 string "Linker script for the SPL stage"
225 default "arch/arm/cpu/arm926ejs/sunxi/u-boot-spl.lds" if MACH_SUNIV
226 default "arch/arm/cpu/armv7/sunxi/u-boot-spl.lds" if ARCH_SUNXI && !MACH_SUNIV && !ARM64
227 default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
228 default "arch/arm/cpu/arm1136/u-boot-spl.lds" if CPU_ARM1136
229 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARCH_LS1043A || ARCH_LS1046A || ARCH_LS2080A
230 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
231 default "arch/arm/mach-at91/arm926ejs/u-boot-spl.lds" if ARCH_AT91 && CPU_ARM926EJS
232 default "arch/arm/mach-at91/armv7/u-boot-spl.lds" if ARCH_AT91 && CPU_V7A
233 default "arch/arm/mach-omap2/u-boot-spl.lds" if ARCH_MX6 || ARCH_OMAP2PLUS || (ARCH_K3 && !ARM64)
234 default "arch/arm/mach-zynq/u-boot-spl.lds" if ARCH_ZYNQ
235 default "board/samsung/common/exynos-uboot-spl.lds" if ARCH_EXYNOS5 || ARCH_EXYNOS4
236 default "board/davinci/da8xxevm/u-boot-spl-da850evm.lds" if ARCH_DAVINCI
237 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
239 The SPL stage will usually require a different linker-script
240 (as it runs from a different memory region) than the regular
241 U-Boot stage. Set this to the path of the linker-script to
246 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
247 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
248 default 0x20060 if SUN50I_GEN_H6
249 default 0x00060 if ARCH_SUNXI
250 default 0xfffc0000 if ARCH_ZYNQMP
253 The address in memory that SPL will be running from.
255 config SPL_BOARD_INIT
256 bool "Call board-specific initialization in SPL"
258 If this option is enabled, U-Boot will call the function
259 spl_board_init() from board_init_r(). This function should be
260 provided by the board.
262 config SPL_BOOTROM_SUPPORT
263 bool "Support returning to the BOOTROM"
265 Some platforms (e.g. the Rockchip RK3368) provide support in their
266 ROM for loading the next boot-stage after performing basic setup
269 Enable this option, to return to the BOOTROM through the
270 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
271 boot device list, if not implemented for a given board)
273 config SPL_BOOTCOUNT_LIMIT
274 bool "Support bootcount in SPL"
275 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
277 On some boards, which use 'falcon' mode, it is necessary to check
278 and increment the number of boot attempts. Such boards do not
279 use proper U-Boot for normal boot flow and hence needs those
280 adjustments to be done in the SPL.
282 config SPL_RAW_IMAGE_SUPPORT
283 bool "Support SPL loading and booting of RAW images"
284 default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
286 depends on !TI_SECURE_DEVICE
288 SPL will support loading and booting a RAW image when this option
289 is y. If this is not set, SPL will move on to other available
290 boot media to find a suitable image.
292 config SPL_LEGACY_IMAGE_FORMAT
293 bool "Support SPL loading and booting of Legacy images"
294 default y if !SPL_LOAD_FIT
295 depends on !TI_SECURE_DEVICE
297 SPL will support loading and booting Legacy images when this option
298 is y. If this is not set, SPL will move on to other available
299 boot media to find a suitable image.
301 config SPL_LEGACY_IMAGE_CRC_CHECK
302 bool "Check CRC of Legacy images"
303 depends on SPL_LEGACY_IMAGE_FORMAT
306 Enable this to check the CRC of Legacy images. While this increases
307 reliability, it affects both code size and boot duration.
308 If disabled, Legacy images are booted if the image magic and size
309 are correct, without further integrity checks.
311 config SPL_SYS_MALLOC_SIMPLE
312 bool "Only use malloc_simple functions in the SPL"
314 Say Y here to only use the *_simple malloc functions from
315 malloc_simple.c, rather then using the versions from dlmalloc.c;
316 this will make the SPL binary smaller at the cost of more heap
317 usage as the *_simple malloc functions do not re-use free-ed mem.
319 config SPL_SHARES_INIT_SP_ADDR
320 bool "SPL and U-Boot use the same initial stack pointer location"
321 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
322 default n if ARCH_SUNXI || ARCH_MX6 || ARCH_MX7
325 In many cases, we can use the same initial stack pointer address for
326 both SPL and U-Boot itself. If you need to specify a different address
327 however, say N here and then set a different value in CONFIG_SPL_STACK.
330 hex "Initial stack pointer location"
331 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
332 depends on !SPL_SHARES_INIT_SP_ADDR
333 default 0x946bb8 if ARCH_MX7
334 default 0x93ffb8 if ARCH_MX6 && MX6_OCRAM_256KB
335 default 0x91ffb8 if ARCH_MX6 && !MX6_OCRAM_256KB
337 Address of the start of the stack SPL will use before SDRAM is
341 bool "Enable SDRAM location for SPL stack"
343 SPL starts off execution in SRAM and thus typically has only a small
344 stack available. Since SPL sets up DRAM while in its board_init_f()
345 function, it is possible for the stack to move there before
346 board_init_r() is reached. This option enables a special SDRAM
347 location for the SPL stack. U-Boot SPL switches to this after
348 board_init_f() completes, and before board_init_r() starts.
350 config SPL_STACK_R_ADDR
351 depends on SPL_STACK_R
352 hex "SDRAM location for SPL stack"
353 default 0x82000000 if ARCH_OMAP2PLUS
355 Specify the address in SDRAM for the SPL stack. This will be set up
356 before board_init_r() is called.
358 config SPL_STACK_R_MALLOC_SIMPLE_LEN
359 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
360 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
363 Specify the amount of the stack to use as memory pool for
364 malloc_simple after switching the stack to DRAM. This may be set
365 to give board_init_r() a larger heap then the initial heap in
366 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
368 config SPL_SEPARATE_BSS
369 bool "BSS section is in a different memory region from text"
371 Some platforms need a large BSS region in SPL and can provide this
372 because RAM is already set up. In this case BSS can be moved to RAM.
373 This option should then be enabled so that the correct device tree
374 location is used. Normally we put the device tree at the end of BSS
375 but with this option enabled, it goes at _image_binary_end.
377 config SYS_SPL_MALLOC
378 bool "Enable malloc pool in SPL"
379 depends on SPL_FRAMEWORK
381 config HAS_CUSTOM_SPL_MALLOC_START
382 bool "For the SPL malloc pool, define a custom starting address"
383 depends on SYS_SPL_MALLOC
385 config CUSTOM_SYS_SPL_MALLOC_ADDR
386 hex "SPL malloc addr"
387 depends on HAS_CUSTOM_SPL_MALLOC_START
389 config SYS_SPL_MALLOC_SIZE
390 hex "Size of the SPL malloc pool"
391 depends on SYS_SPL_MALLOC
396 depends on SPL_OF_PLATDATA
397 # Bind cannot be supported because the udevice structs are in read-only
398 # memory so we cannot update the linked lists.
399 select SPL_OF_PLATDATA_NO_BIND
400 select SPL_OF_PLATDATA_RT
402 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
403 section of memory. This means that of-platdata must make a copy (in
404 writeable memory) of anything it wants to modify, such as
407 config SPL_BANNER_PRINT
408 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
411 If this option is enabled, SPL will print the banner with version
412 info. Disabling this option could be useful to reduce SPL boot time
413 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
416 depends on ARM && !ARM64
417 bool "Allows initializing BSS early before entering board_init_f"
419 On some platform we have sufficient memory available early on to
420 allow setting up and using a basic BSS prior to entering
421 board_init_f. Activating this option will also de-activate the
422 clearing of BSS during the SPL relocation process, thus allowing
423 to carry state from board_init_f to board_init_r by way of BSS.
425 config SPL_DISPLAY_PRINT
426 bool "Display a board-specific message in SPL"
428 If this option is enabled, U-Boot will call the function
429 spl_display_print() immediately after displaying the SPL console
430 banner ("U-Boot SPL ..."). This function should be provided by
433 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
434 bool "MMC raw mode: by sector"
435 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
436 ARCH_MX6 || ARCH_MX7 || \
437 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
438 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
439 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
440 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
442 Use sector number for specifying U-Boot location on MMC/SD in
445 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
446 hex "Address on the MMC to load U-Boot from"
447 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
448 default 0x40 if ARCH_SUNXI
449 default 0x75 if ARCH_DAVINCI
450 default 0x8a if ARCH_MX6 || ARCH_MX7
451 default 0x100 if ARCH_UNIPHIER
452 default 0x0 if ARCH_MVEBU
453 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
454 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
455 OMAP54XX || AM33XX || AM43XX || ARCH_K3
456 default 0x4000 if ARCH_ROCKCHIP
457 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
459 Address on the MMC to load U-Boot from, when the MMC is being used
460 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
462 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
463 hex "U-Boot main hardware partition image offset"
464 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
465 default 0x10 if ARCH_SUNXI
468 On some platforms SPL location depends on hardware partition. The ROM
469 code skips the MBR sector when loading SPL from main hardware data
470 partition. This adds offset to the main U-Boot image. Set this symbol
471 to the number of skipped sectors.
473 If unsure, leave the default.
475 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
476 bool "MMC Raw mode: by partition"
478 Use a partition for loading U-Boot when using MMC/SD in raw mode.
480 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
481 hex "Partition to use to load U-Boot from"
482 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
485 Partition on the MMC to load U-Boot from when the MMC is being
488 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
489 bool "MMC raw mode: by partition type"
490 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
492 Use partition type for specifying U-Boot partition on MMC/SD in
493 raw mode. U-Boot will be loaded from the first partition of this
496 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
497 hex "Partition Type on the MMC to load U-Boot from"
498 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
500 Partition Type on the MMC to load U-Boot from, when the MMC is being
503 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
504 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
505 depends on SUPPORT_EMMC_BOOT
507 eMMC boot partition is normally configured by the bits of the EXT_CSD
508 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
509 cases it might be required in SPL to load the image from different
510 partition than the partition selected by EXT_CSC_PART_CONFIG register.
511 Enable this option if you intend to use an eMMC boot partition other
512 then selected via EXT_CSC_PART_CONFIG register and specify the custom
513 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
516 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
517 int "Number of the eMMC boot partition to use"
518 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
521 eMMC boot partition number to use when the eMMC in raw mode and
522 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
523 by user defined partition number.
527 default y if SPL_LEGACY_IMAGE_FORMAT || SPL_EFI_PARTITION
528 default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
530 Enable this to support CRC32 in uImages or FIT images within SPL.
531 This is a 32-bit checksum value that can be used to verify images.
532 For FIT images, this is the least secure type of checksum, suitable
533 for detected accidental image corruption. For secure applications you
534 should consider SHA1 or SHA256.
540 Enable this to support MD5 in FIT images within SPL. An MD5
541 checksum is a 128-bit hash value used to check that the image
542 contents have not been corrupted. Note that MD5 is not considered
543 secure as it is possible (with a brute-force attack) to adjust the
544 image while still retaining the same MD5 hash value. For secure
545 applications where images may be changed maliciously, you should
546 consider SHA256 or SHA384.
548 config SPL_FIT_IMAGE_TINY
549 bool "Remove functionality from SPL FIT loading to reduce size"
551 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
552 default y if ARCH_IMX8M
554 Enable this to reduce the size of the FIT image loading code
555 in SPL, if space for the SPL binary is very tight.
557 This skips the recording of each loaded payload
558 (i.e. loadable) into the FDT (modifying the loaded FDT to
559 ensure this information is available to the next image
563 bool "Support CACHE drivers"
565 Enable CACHE drivers in SPL. These drivers can keep data so that
566 future requests for that data can be served faster. Enable this option
567 to build the drivers in drivers/cache as part of an SPL build.
570 bool "Support CPU drivers"
572 Enable this to support CPU drivers in SPL. These drivers can set
573 up CPUs and provide information about them such as the model and
574 name. This can be useful in SPL since setting up the CPUs earlier
575 may improve boot performance. Enable this option to build the
576 drivers in drivers/cpu as part of an SPL build.
579 bool "Support crypto drivers"
581 Enable crypto drivers in SPL. These drivers can be used to
582 accelerate secure boot processing in secure applications. Enable
583 this option to build the drivers in drivers/crypto as part of an
587 bool "Support DMA drivers"
589 Enable DMA (direct-memory-access) drivers in SPL. These drivers
590 can be used to handle memory-to-peripheral data transfer without
591 the CPU moving the data. Enable this option to build the drivers
592 in drivers/dma as part of an SPL build.
594 config SPL_DRIVERS_MISC
595 bool "Support misc drivers"
597 Enable miscellaneous drivers in SPL. These drivers perform various
598 tasks that don't fall nicely into other categories, Enable this
599 option to build the drivers in drivers/misc as part of an SPL
600 build, for those that support building in SPL (not all drivers do).
602 config SPL_ENV_SUPPORT
603 bool "Support an environment"
605 Enable environment support in SPL. The U-Boot environment provides
606 a number of settings (essentially name/value pairs) which can
607 control many aspects of U-Boot's operation. Normally this is not
608 needed in SPL as it has a much simpler task with less
609 configuration. But some boards use this to support 'Falcon' boot
610 on EXT2 and FAT, where SPL boots directly into Linux without
611 starting U-Boot first. Enabling this option will make env_get()
612 and env_set() available in SPL.
615 bool "Support save environment"
616 depends on SPL_ENV_SUPPORT
617 select SPL_MMC_WRITE if ENV_IS_IN_MMC
619 Enable save environment support in SPL after setenv. By default
620 the saveenv option is not provided in SPL, but some boards need
621 this support in 'Falcon' boot, where SPL need to boot from
622 different images based on environment variable set by OS. For
623 example OS may set "reboot_image" environment variable to
624 "recovery" inorder to boot recovery image by SPL. The SPL read
625 "reboot_image" and act accordingly and change the reboot_image
626 to default mode using setenv and save the environment.
629 bool "Support Ethernet"
630 depends on SPL_ENV_SUPPORT
633 Enable access to the network subsystem and associated Ethernet
634 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
635 link rather than from an on-board peripheral. Environment support
636 is required since the network stack uses a number of environment
637 variables. See also SPL_NET.
640 bool "Support EXT filesystems"
642 Enable support for EXT2/3/4 filesystems with SPL. This permits
643 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
644 filesystem from within SPL. Support for the underlying block
645 device (e.g. MMC or USB) must be enabled separately.
647 config SPL_FS_SQUASHFS
648 bool "Support SquashFS filesystems"
651 Enable support for SquashFS filesystems with SPL. This permits
652 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
653 filesystem from within SPL. Support for the underlying block
654 device (e.g. MMC or USB) must be enabled separately.
657 bool "Support FAT filesystems"
660 Enable support for FAT and VFAT filesystems with SPL. This
661 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
662 filesystem from within SPL. Support for the underlying block
663 device (e.g. MMC or USB) must be enabled separately.
665 config SPL_FS_LOAD_PAYLOAD_NAME
666 string "File to load for U-Boot from the filesystem"
667 depends on SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS
668 default "tispl.bin" if SYS_K3_SPL_ATF
669 default "u-boot.itb" if SPL_LOAD_FIT
672 Filename to read to load U-Boot when reading from filesystem.
674 config SPL_FS_LOAD_KERNEL_NAME
675 string "File to load for the OS kernel from the filesystem"
676 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
679 Filename to read to load for the OS kernel when reading from the
682 config SPL_FS_LOAD_ARGS_NAME
683 string "File to load for the OS kernel argument parameters from the filesystem"
684 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
687 Filename to read to load for the OS kernel argument parameters from
691 bool "Support write for FAT filesystems"
693 Enable write support for FAT and VFAT filesystems with SPL.
694 Support for the underlying block device (e.g. MMC or USB) must be
700 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
701 provide software-configurable hardware which is typically used to
702 implement peripherals (such as UARTs, LCD displays, MMC) or
703 accelerate custom processing functions, such as image processing
704 or machine learning. Sometimes it is useful to program the FPGA
705 as early as possible during boot, and this option can enable that
709 bool "Support GPIO in SPL"
711 Enable support for GPIOs (General-purpose Input/Output) in SPL.
712 GPIOs allow U-Boot to read the state of an input line (high or
713 low) and set the state of an output line. This can be used to
714 drive LEDs, control power to various system parts and read user
715 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
716 for example. Enable this option to build the drivers in
717 drivers/gpio as part of an SPL build.
722 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
723 I2C works with a clock and data line which can be driven by a
724 one or more masters or slaves. It is a fairly complex bus but is
725 widely used as it only needs two lines for communication. Speeds of
726 400kbps are typical but up to 3.4Mbps is supported by some
727 hardware. I2C can be useful in SPL to configure power management
728 ICs (PMICs) before raising the CPU clock speed, for example.
729 Enable this option to build the drivers in drivers/i2c as part of
732 config SPL_LIBCOMMON_SUPPORT
733 bool "Support common libraries"
735 Enable support for common U-Boot libraries within SPL. These
736 libraries include common code to deal with U-Boot images,
737 environment and USB, for example. This option is enabled on many
738 boards. Enable this option to build the code in common/ as part of
741 config SPL_LIBDISK_SUPPORT
742 bool "Support disk partitions"
745 Enable support for disk partitions within SPL. 'Disk' is something
746 of a misnomer as it includes non-spinning media such as flash (as
747 used in MMC and USB sticks). Partitions provide a way for a disk
748 to be split up into separate regions, with a partition table placed
749 at the start or end which describes the location and size of each
750 'partition'. These partitions are typically uses as individual block
751 devices, typically with an EXT2 or FAT filesystem in each. This
752 option enables whatever partition support has been enabled in
753 U-Boot to also be used in SPL. It brings in the code in disk/.
755 config SPL_LIBGENERIC_SUPPORT
756 bool "Support generic libraries"
758 Enable support for generic U-Boot libraries within SPL. These
759 libraries include generic code to deal with device tree, hashing,
760 printf(), compression and the like. This option is enabled on many
761 boards. Enable this option to build the code in lib/ as part of an
764 config SPL_DM_MAILBOX
765 bool "Support Mailbox"
768 Enable support for Mailbox within SPL. This enable the inter
769 processor communication protocols tobe used within SPL. Enable
770 this option to build the drivers in drivers/mailbox as part of
776 select HAVE_BLOCK_DEVICE
778 Enable support for MMC (Multimedia Card) within SPL. This enables
779 the MMC protocol implementation and allows any enabled drivers to
780 be used within SPL. MMC can be used with or without disk partition
781 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
782 this option to build the drivers in drivers/mmc as part of an SPL
785 config SYS_MMCSD_FS_BOOT_PARTITION
786 int "MMC Boot Partition"
789 Partition on the MMC to load U-Boot from when the MMC is being
791 Use -1 as a special value to use the first bootable partition.
794 bool "Tiny MMC framework in SPL"
797 Enable MMC framework tinification support. This option is useful if
798 if your SPL is extremely size constrained. Heed the warning, enable
799 this option if and only if you know exactly what you are doing, if
800 you are reading this help text, you most likely have no idea :-)
802 The MMC framework is reduced to bare minimum to be useful. No malloc
803 support is needed for the MMC framework operation with this option
804 enabled. The framework supports exactly one MMC device and exactly
805 one MMC driver. The MMC driver can be adjusted to avoid any malloc
806 operations too, which can remove the need for malloc support in SPL
807 and thus further reduce footprint.
810 bool "MMC/SD/SDIO card support for write operations in SPL"
813 Enable write access to MMC and SD Cards in SPL
816 config SPL_MPC8XXX_INIT_DDR
817 bool "Support MPC8XXX DDR init"
819 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
820 random-access memory) on the MPC8XXX family within SPL. This
821 allows DRAM to be set up before loading U-Boot into that DRAM,
824 config SPL_MTD_SUPPORT
825 bool "Support MTD drivers"
827 Enable support for MTD (Memory Technology Device) within SPL. MTD
828 provides a block interface over raw NAND and can also be used with
829 SPI flash. This allows SPL to load U-Boot from supported MTD
830 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
831 to enable specific MTD drivers.
834 bool "Support new Mentor Graphics USB"
836 Enable support for Mentor Graphics USB in SPL. This is a new
837 driver used by some boards. Enable this option to build
838 the drivers in drivers/usb/musb-new as part of an SPL build. The
839 old drivers are in drivers/usb/musb.
841 config SPL_NAND_SUPPORT
842 bool "Support NAND flash"
844 Enable support for NAND (Negative AND) flash in SPL. NAND flash
845 can be used to allow SPL to load U-Boot from supported devices.
846 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
849 config SPL_NAND_RAW_ONLY
850 bool "Support to boot only raw u-boot.bin images"
851 depends on SPL_NAND_SUPPORT
853 Use this only if you need to save space.
855 config SPL_NAND_DRIVERS
856 bool "Use standard NAND driver"
858 SPL uses normal NAND drivers, not minimal drivers.
861 bool "Include standard ECC in SPL"
863 config SPL_NAND_SOFTECC
864 bool "Use software ECC in SPL"
865 depends on SPL_NAND_ECC
867 config SPL_NAND_SIMPLE
868 bool "Support simple NAND drivers in SPL"
870 Support for NAND boot using simple NAND drivers that
871 expose the cmd_ctrl() interface.
874 depends on SPL_NAND_DRIVERS
875 bool "Use Base NAND Driver"
877 Include nand_base.c in the SPL.
879 config SPL_NAND_IDENT
880 depends on SPL_NAND_BASE
881 bool "Use chip ID to identify NAND flash"
883 SPL uses the chip ID list to identify the NAND flash.
888 Enable support for loading payloads from UBI. See
889 README.ubispl for more info.
891 menu "UBI configuration for SPL"
894 config SPL_UBI_LOAD_BY_VOLNAME
895 bool "Support loading volumes by name"
897 This enables support for loading UBI volumes by name. When this
898 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
899 configure the volume name from which to load U-Boot.
901 config SPL_UBI_MAX_VOL_LEBS
902 int "Maximum number of LEBs per volume"
904 The maximum number of logical eraseblocks which a static volume
905 to load can contain. Used for sizing the scan data structure.
907 config SPL_UBI_MAX_PEB_SIZE
908 int "Maximum PEB size"
910 The maximum physical erase block size.
912 config SPL_UBI_MAX_PEBS
913 int "Maximum number of PEBs"
915 The maximum physical erase block size. If not overridden by
916 board code, this value will be used as the actual number of PEBs.
918 config SPL_UBI_PEB_OFFSET
919 int "Offset to first UBI PEB"
921 The offset in number of PEBs from the start of flash to the first
922 PEB part of the UBI image.
924 config SPL_UBI_VID_OFFSET
925 int "Offset to VID header"
927 config SPL_UBI_LEB_START
928 int "Offset to LEB in PEB"
930 The offset in bytes to the LEB within a PEB.
932 config SPL_UBI_INFO_ADDR
933 hex "Address to place UBI scan info"
935 Address for ubispl to place the scan info. Read README.ubispl to
936 determine the required size
938 config SPL_UBI_VOL_IDS
939 int "Maximum volume id"
941 The maximum volume id which can be loaded. Used for sizing the
944 config SPL_UBI_LOAD_MONITOR_ID
945 int "id of U-Boot volume"
947 The UBI volume id from which to load U-Boot
949 config SPL_UBI_LOAD_MONITOR_VOLNAME
950 string "volume name of U-Boot volume"
951 depends on SPL_UBI_LOAD_BY_VOLNAME
953 The UBI volume name from which to load U-Boot
955 config SPL_UBI_LOAD_KERNEL_ID
956 int "id of kernel volume"
957 depends on SPL_OS_BOOT
959 The UBI volume id from which to load the kernel
961 config SPL_UBI_LOAD_ARGS_ID
962 int "id of kernel args volume"
963 depends on SPL_OS_BOOT
965 The UBI volume id from which to load the device tree
967 config UBI_SPL_SILENCE_MSG
968 bool "silence UBI SPL messages"
970 Disable messages from UBI SPL. This leaves warnings
976 bool "Support SPI DM drivers in SPL"
979 Enable support for SPI DM drivers in SPL.
981 config SPL_DM_SPI_FLASH
982 bool "Support SPI DM FLASH drivers in SPL"
985 Enable support for SPI DM flash drivers in SPL.
988 bool "Support networking"
990 Enable support for network devices (such as Ethernet) in SPL.
991 This permits SPL to load U-Boot over a network link rather than
992 from an on-board peripheral. Environment support is required since
993 the network stack uses a number of environment variables. See also
996 config SPL_NET_VCI_STRING
997 string "BOOTP Vendor Class Identifier string sent by SPL"
1000 As defined by RFC 2132 the vendor class identifier field can be
1001 sent by the client to identify the vendor type and configuration
1002 of a client. This is often used in practice to allow for the DHCP
1003 server to specify different files to load depending on if the ROM,
1004 SPL or U-Boot itself makes the request
1006 config SPL_NO_CPU_SUPPORT
1008 depends on (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
1010 This is specific to the ARM926EJ-S CPU. It disables the standard
1011 start.S start-up code, presumably so that a replacement can be
1012 used on that CPU. You should not enable it unless you know what
1015 config SPL_NOR_SUPPORT
1016 bool "Support NOR flash"
1018 Enable support for loading U-Boot from memory-mapped NOR (Negative
1019 OR) flash in SPL. NOR flash is slow to write but fast to read, and
1020 a memory-mapped device makes it very easy to access. Loading from
1021 NOR is typically achieved with just a memcpy().
1023 config SPL_XIP_SUPPORT
1026 Enable support for execute in place of U-Boot or kernel image. There
1027 is no need to copy image from flash to ram if flash supports execute
1028 in place. Its very useful in systems having enough flash but not
1029 enough ram to load the image.
1031 config SPL_ONENAND_SUPPORT
1032 bool "Support OneNAND flash"
1034 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
1035 a type of NAND flash and therefore can be used to allow SPL to
1036 load U-Boot from supported devices. This enables the drivers in
1037 drivers/mtd/onenand as part of an SPL build.
1040 bool "Activate Falcon Mode"
1041 depends on !TI_SECURE_DEVICE
1043 Enable booting directly to an OS from SPL.
1044 for more info read doc/README.falcon
1046 config SYS_SPL_ARGS_ADDR
1047 hex "Address in memory to load 'args' file for Falcon Mode to"
1048 depends on SPL_OS_BOOT
1049 default 0x88000000 if ARCH_OMAP2PLUS
1051 Address in memory where the 'args' file, typically a device tree
1052 will be loaded in to memory.
1054 config SYS_NAND_SPL_KERNEL_OFFS
1055 hex "Address in memory to load the OS file for Falcon mode to"
1056 depends on SPL_OS_BOOT && SPL_NAND_SUPPORT
1059 hex "addr, where OS is found"
1060 depends on SPL_OS_BOOT && SPL_NOR_SUPPORT
1062 Specify the address, where the OS image is found, which
1065 config SPL_FALCON_BOOT_MMCSD
1066 bool "Enable Falcon boot from MMC or SD media"
1067 depends on SPL_OS_BOOT && SPL_MMC
1069 Select this if the Falcon mode OS image mode is on MMC or SD media.
1071 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
1072 hex "Falcon mode: Sector to load kernel uImage from MMC"
1073 depends on SPL_FALCON_BOOT_MMCSD
1075 When Falcon mode is used with an MMC or SD media, SPL needs to know
1076 where to look for the kernel uImage. The image is expected to begin
1077 at the raw MMC specified in this config.
1078 Note that the Falcon mode image can also be a FIT, if FIT support is
1081 config SYS_MMCSD_RAW_MODE_ARGS_SECTOR
1082 hex "Falcon mode: Sector to load 'args' from MMC"
1083 depends on SPL_FALCON_BOOT_MMCSD
1085 When Falcon mode is used with an MMC or SD media, SPL needs to know
1086 where to look for the OS 'args', typically a device tree. The
1087 contents are expected to begin at the raw MMC specified in this config.
1088 Note that if using a FIT image, this and the next option can be set to
1091 config SYS_MMCSD_RAW_MODE_ARGS_SECTORS
1092 hex "Falcon mode: Number of sectors to load for 'args' from MMC"
1093 depends on SPL_FALCON_BOOT_MMCSD && SYS_MMCSD_RAW_MODE_ARGS_SECTOR != 0x0
1096 string "SPL payload"
1097 default "tpl/u-boot-with-tpl.bin" if TPL
1098 default "u-boot.bin"
1100 Payload for SPL boot. For backward compatibility, default to
1101 u-boot.bin, i.e. RAW image without any header. In case of
1102 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1106 bool "Support PCI drivers"
1108 Enable support for PCI in SPL. For platforms that need PCI to boot,
1109 or must perform some init using PCI in SPL, this provides the
1110 necessary driver support. This enables the drivers in drivers/pci
1111 as part of an SPL build.
1114 bool "Support PCH drivers"
1116 Enable support for PCH (Platform Controller Hub) devices in SPL.
1117 These are used to set up GPIOs and the SPI peripheral early in
1118 boot. This enables the drivers in drivers/pch as part of an SPL
1121 config SPL_POST_MEM_SUPPORT
1122 bool "Support POST drivers"
1124 Enable support for POST (Power-on Self Test) in SPL. POST is a
1125 procedure that checks that the hardware (CPU or board) appears to
1126 be functionally correctly. It is a sanity check that can be
1127 performed before booting. This enables the drivers in post/drivers
1128 as part of an SPL build.
1131 bool "Support reset drivers"
1134 Enable support for reset control in SPL.
1135 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1136 by using the generic reset API provided by driver model.
1137 This enables the drivers in drivers/reset as part of an SPL build.
1140 bool "Support power drivers"
1142 Enable support for power control in SPL. This includes support
1143 for PMICs (Power-management Integrated Circuits) and some of the
1144 features provided by PMICs. In particular, voltage regulators can
1145 be used to enable/disable power and vary its voltage. That can be
1146 useful in SPL to turn on boot peripherals and adjust CPU voltage
1147 so that the clock speed can be increased. This enables the drivers
1148 in drivers/power, drivers/power/pmic and drivers/power/regulator
1149 as part of an SPL build.
1151 config SPL_POWER_DOMAIN
1152 bool "Support power domain drivers"
1155 Enable support for power domain control in SPL. Many SoCs allow
1156 power to be applied to or removed from portions of the SoC (power
1157 domains). This may be used to save power. This API provides the
1158 means to control such power management hardware. This enables
1159 the drivers in drivers/power/domain as part of a SPL build.
1161 config SPL_RAM_SUPPORT
1162 bool "Support booting from RAM"
1163 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1165 Enable booting of an image in RAM. The image can be preloaded or
1166 it can be loaded by SPL directly into RAM (e.g. using USB).
1168 config SPL_RAM_DEVICE
1169 bool "Support booting from preloaded image in RAM"
1170 depends on SPL_RAM_SUPPORT
1171 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1173 Enable booting of an image already loaded in RAM. The image has to
1174 be already in memory when SPL takes over, e.g. loaded by the boot
1177 config SPL_REMOTEPROC
1178 bool "Support REMOTEPROCS"
1180 Enable support for REMOTEPROCs in SPL. This permits to load
1181 a remote processor firmware in SPL.
1184 bool "Support RTC drivers"
1186 Enable RTC (Real-time Clock) support in SPL. This includes support
1187 for reading and setting the time. Some RTC devices also have some
1188 non-volatile (battery-backed) memory which is accessible if
1189 needed. This enables the drivers in drivers/rtc as part of an SPL
1193 bool "Support loading from SATA"
1195 Enable support for SATA (Serial AT attachment) in SPL. This allows
1196 use of SATA devices such as hard drives and flash drivers for
1197 loading U-Boot. SATA is used in higher-end embedded systems and
1198 can provide higher performance than MMC , at somewhat higher
1199 expense and power consumption. This enables loading from SATA
1200 using a configured device.
1202 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1203 bool "SATA raw mode: by sector"
1205 default y if ARCH_MVEBU
1207 Use sector number for specifying U-Boot location on SATA disk in
1210 config SPL_SATA_RAW_U_BOOT_SECTOR
1211 hex "Sector on the SATA disk to load U-Boot from"
1212 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1213 default 0x1 if ARCH_MVEBU
1215 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1216 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1219 bool "Support serial"
1223 Enable support for serial in SPL. This allows use of a serial UART
1224 for displaying messages while SPL is running. It also brings in
1225 printf() and panic() functions. This should normally be enabled
1226 unless there are space reasons not to. Even then, consider
1227 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1230 bool "Support SPI drivers"
1232 Enable support for using SPI in SPL. This is used for connecting
1233 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1234 more details on that. The SPI driver provides the transport for
1235 data between the SPI flash and the CPU. This option can be used to
1236 enable SPI drivers that are needed for other purposes also, such
1239 config SPL_SPI_FLASH_SUPPORT
1240 bool "Support SPI flash drivers"
1243 Enable support for using SPI flash in SPL, and loading U-Boot from
1244 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1245 the SPI bus that is used to connect it to a system. It is a simple
1246 but fast bidirectional 4-wire bus (clock, chip select and two data
1247 lines). This enables the drivers in drivers/mtd/spi as part of an
1248 SPL build. This normally requires SPL_SPI.
1250 if SPL_SPI_FLASH_SUPPORT
1252 config SPL_SPI_FLASH_TINY
1253 bool "Enable low footprint SPL SPI Flash support"
1254 depends on !SPI_FLASH_BAR
1255 default y if SPI_FLASH
1257 Enable lightweight SPL SPI Flash support that supports just reading
1258 data/images from flash. No support to write/erase flash. Enable
1259 this if you have SPL size limitations and don't need full
1260 fledged SPI flash support.
1262 config SPL_SPI_FLASH_SFDP_SUPPORT
1263 bool "SFDP table parsing support for SPI NOR flashes"
1264 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1266 Enable support for parsing and auto discovery of parameters for
1267 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1268 tables as per JESD216 standard in SPL.
1270 config SPL_SPI_FLASH_MTD
1271 bool "Support for SPI flash MTD drivers in SPL"
1273 Enable support for SPI flash MTD drivers in SPL.
1276 bool "Support loading from SPI flash"
1278 Enable support for loading next stage, U-Boot or otherwise, from
1279 SPI NOR in U-Boot SPL.
1281 endif # SPL_SPI_FLASH_SUPPORT
1283 config SYS_SPI_U_BOOT_OFFS
1284 hex "address of u-boot payload in SPI flash"
1285 default 0x8000 if ARCH_SUNXI
1287 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1289 Address within SPI-Flash from where the u-boot payload is fetched
1293 bool "Driver support for thermal devices"
1295 Enable support for temperature-sensing devices. Some SoCs have on-chip
1296 temperature sensors to permit warnings, speed throttling or even
1297 automatic power-off when the temperature gets too high or low. Other
1298 devices may be discrete but connected on a suitable bus.
1301 bool "Support USB host drivers"
1302 select HAVE_BLOCK_DEVICE
1304 Enable access to USB (Universal Serial Bus) host devices so that
1305 SPL can load U-Boot from a connected USB peripheral, such as a USB
1306 flash stick. While USB takes a little longer to start up than most
1307 buses, it is very flexible since many different types of storage
1308 device can be attached. This option enables the drivers in
1309 drivers/usb/host as part of an SPL build.
1311 config SPL_USB_STORAGE
1312 bool "Support loading from USB"
1313 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1315 Enable support for USB devices in SPL. This allows use of USB
1316 devices such as hard drives and flash drivers for loading U-Boot.
1317 The actual drivers are enabled separately using the normal U-Boot
1318 config options. This enables loading from USB using a configured
1321 config SYS_USB_FAT_BOOT_PARTITION
1322 int "Partition on USB to use to load U-Boot from"
1323 depends on SPL_USB_STORAGE
1326 Partition on the USB storage device to load U-Boot from
1328 config SPL_USB_GADGET
1329 bool "Suppport USB Gadget drivers"
1331 Enable USB Gadget API which allows to enable USB device functions
1336 config SPL_USB_ETHER
1337 bool "Support USB Ethernet drivers"
1340 Enable access to the USB network subsystem and associated
1341 drivers in SPL. This permits SPL to load U-Boot over a
1342 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1343 than from an onboard peripheral. Environment support is required
1344 since the network stack uses a number of environment variables.
1345 See also SPL_NET and SPL_ETH.
1348 bool "Support DFU (Device Firmware Upgrade)"
1350 select SPL_DFU_NO_RESET
1351 depends on SPL_RAM_SUPPORT
1353 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1354 RAM memory device support. The ROM code will load and execute
1355 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1356 selected device partition from host-pc using dfu-utils.
1357 This feature is useful to flash the binaries to factory or bare-metal
1358 boards using USB interface.
1361 bool "DFU device selection"
1366 depends on SPL_DFU && SPL_RAM_SUPPORT
1368 select RAM/DDR memory device for loading binary images
1369 (u-boot/kernel) to the selected device partition using
1370 DFU and execute the u-boot/kernel from RAM.
1374 config SPL_USB_SDP_SUPPORT
1375 bool "Support SDP (Serial Download Protocol)"
1376 depends on SPL_SERIAL
1378 Enable Serial Download Protocol (SDP) device support in SPL. This
1379 allows to download images into memory and execute (jump to) them
1380 using the same protocol as implemented by the i.MX family's boot ROM.
1382 config SPL_SDP_USB_DEV
1383 int "SDP USB controller index"
1385 depends on SPL_USB_SDP_SUPPORT
1387 Some boards have USB controller other than 0. Define this option
1388 so it can be used in compiled environment.
1392 bool "Support watchdog drivers"
1393 imply SPL_WDT if !HW_WATCHDOG
1395 Enable support for watchdog drivers in SPL. A watchdog is
1396 typically a hardware peripheral which can reset the system when it
1397 detects no activity for a while (such as a software crash). This
1398 enables the drivers in drivers/watchdog as part of an SPL build.
1400 config SPL_YMODEM_SUPPORT
1401 bool "Support loading using Ymodem"
1402 depends on SPL_SERIAL
1404 While loading from serial is slow it can be a useful backup when
1405 there is no other option. The Ymodem protocol provides a reliable
1406 means of transmitting U-Boot over a serial line for using in SPL,
1407 with a checksum to ensure correctness.
1410 bool "Support ARM Trusted Firmware"
1411 depends on ARM64 && SPL_FIT
1413 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1414 is loaded by SPL (which is considered as BL2 in ATF terminology).
1415 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1417 config SPL_ATF_LOAD_IMAGE_V2
1418 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1421 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1423 If you want to load a bl31 image from the SPL and need the new
1426 config SPL_ATF_NO_PLATFORM_PARAM
1427 bool "Pass no platform parameter"
1430 While we expect to call a pointer to a valid FDT (or NULL)
1431 as the platform parameter to an ATF, some ATF versions are
1432 not U-Boot aware and have an insufficiently robust parameter
1433 validation to gracefully reject a FDT being passed.
1435 If this option is enabled, the spl_atf os-type handler will
1436 always pass NULL for the platform parameter.
1438 If your ATF is affected, say Y.
1440 config SPL_AM33XX_ENABLE_RTC32K_OSC
1441 bool "Enable the RTC32K OSC on AM33xx based platforms"
1445 Enable access to the AM33xx RTC and select the external 32kHz clock
1448 config SPL_OPTEE_IMAGE
1449 bool "Support OP-TEE Trusted OS image in SPL"
1452 OP-TEE is an open source Trusted OS which is loaded by SPL.
1453 More detail at: https://github.com/OP-TEE/optee_os
1456 bool "Support RISC-V OpenSBI"
1457 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1459 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1460 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1461 firmware. It is loaded and started by U-Boot SPL.
1463 More details are available at https://github.com/riscv/opensbi and
1464 https://github.com/riscv/riscv-sbi-doc
1466 config SPL_OPENSBI_LOAD_ADDR
1467 hex "OpenSBI load address"
1468 depends on SPL_OPENSBI
1470 Load address of the OpenSBI binary.
1473 string "Addtional build targets for 'make'"
1474 default "spl/u-boot-spl.srec" if RCAR_GEN2
1475 default "spl/u-boot-spl.scif" if RCAR_GEN3
1478 On some platforms we need to have 'make' run additional build target
1479 rules. If required on your platform, enter it here, otherwise leave blank.
1482 config SPL_AT91_MCK_BYPASS
1483 bool "Use external clock signal as a source of main clock for AT91 platforms"
1484 depends on ARCH_AT91
1486 Use external 8 to 24 Mhz clock signal as source of main clock instead
1487 of an external crystal oscillator.
1488 This option disables the internal driving on the XOUT pin.
1489 The external source has to provide a stable clock on the XIN pin.
1490 If this option is disabled, the SoC expects a crystal oscillator
1491 that needs driving on both XIN and XOUT lines.
1495 depends on SUPPORT_TPL
1498 If you want to build TPL as well as the normal image and SPL, say Y.
1500 source "common/spl/Kconfig.tpl"
1503 depends on SUPPORT_SPL
1506 If you want to build VPL as well as the normal image, TPL and SPL,
1509 source "common/spl/Kconfig.vpl"