12 config SPL_DFU_NO_RESET
17 depends on SUPPORT_SPL
20 If you want to build SPL as well as the normal image, say Y.
23 bool "Support SPL based upon the common SPL framework"
27 Enable the SPL framework under common/spl/. This framework
28 supports MMC, NAND and YMODEM and other methods loading of U-Boot
29 and the Linux Kernel. If unsure, say Y.
31 config SPL_FRAMEWORK_BOARD_INIT_F
32 bool "Define a generic function board_init_f"
33 depends on SPL_FRAMEWORK
35 Define a generic function board_init_f that:
36 - initialize the spl (spl_early_init)
37 - initialize the serial (preloader_console_init)
38 Unless you want to provide your own board_init_f, you should say Y.
41 hex "Maximum size of SPL image"
43 default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
44 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
47 Specifies the maximum length of the U-Boot SPL image.
48 If this value is zero, it is ignored.
50 config SPL_SIZE_LIMIT_SUBTRACT_GD
51 bool "SPL image size check: provide space for global data"
52 depends on SPL_SIZE_LIMIT > 0
54 If enabled, aligned size of global data is reserved in
55 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
56 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
57 pre-reloc global data is put into this SRAM, too.
59 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
60 bool "SPL image size check: provide space for malloc() pool before relocation"
61 depends on SPL_SIZE_LIMIT > 0
63 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
64 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
65 describes the size of SRAM available for SPL when pre-reloc malloc
66 pool is put into this SRAM, too.
68 config SPL_SIZE_LIMIT_PROVIDE_STACK
69 hex "SPL image size check: provide stack space before relocation"
70 depends on SPL_SIZE_LIMIT > 0
73 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
74 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
75 of SRAM available for SPL when the stack required before reolcation
79 hex "Maximum size of the SPL image, excluding BSS"
80 default 0x30000 if ARCH_MX6 && MX6_OCRAM_256KB
81 default 0x1b000 if AM33XX && !TI_SECURE_DEVICE
82 default 0x10000 if ARCH_MX6 && !MX6_OCRAM_256KB
83 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x10000
84 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x20000 && !MACH_SUN50I_H616
85 default 0x7000 if RCAR_GEN3
86 default 0x5fa0 if SUNXI_SRAM_ADDRESS = 0x0
89 Maximum size of the SPL image (text, data, rodata, and linker lists
90 sections), BSS excluded. When defined, the linker checks that the
91 actual size does not exceed it.
94 hex "Offset to which the SPL should be padded before appending the SPL payload"
95 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
96 default 0x11000 if ARCH_MX7 || (ARCH_MX6 && !MX6_OCRAM_256KB)
97 default 0x10000 if ARCH_KEYSTONE
98 default 0x8000 if ARCH_SUNXI && !MACH_SUN50I_H616
99 default TPL_MAX_SIZE if TPL_MAX_SIZE > SPL_MAX_SIZE
102 Image offset to which the SPL should be padded before appending the
103 SPL payload. By default, this is defined as CONFIG_SPL_MAX_SIZE, or 0 if
104 CONFIG_SPL_MAX_SIZE is undefined. CONFIG_SPL_PAD_TO must be either
105 0, meaning to append the SPL payload without any padding, or >=
109 prompt "Enforce SPL BSS limit"
110 depends on SPL && !PPC
111 default SPL_BSS_LIMIT
113 In some platforms we only want to enforce a limit on the size of the
114 BSS in memory. On other platforms we need to enforce a limit on the
115 whole of the memory allocation as we're strictly limited to a small
116 typically non-DRAM location. Finally, other platforms do not enforce
117 a memory limit within SPL.
119 config SPL_NO_BSS_LIMIT
120 bool "Do not enforce a build time limit on the size of the BSS"
123 bool "Enforce a limit on the size of the BSS only"
125 config SPL_FOOTPRINT_LIMIT
126 bool "Enforce a limit on the whole of memory allocated to SPL, BSS included"
130 config SPL_BSS_MAX_SIZE
131 hex "Maximum size in memory allocated to the SPL BSS"
132 depends on SPL_BSS_LIMIT
133 default 0x100000 if ARCH_MX6 || RISCV
134 default 0x80000 if ARCH_OMAP2PLUS || ARCH_SUNXI
136 When non-zero, the linker checks that the actual memory used by SPL
137 from __bss_start to __bss_end does not exceed it.
139 config SPL_MAX_FOOTPRINT
140 hex "Maximum size in memory allocated to the SPL, BSS included"
141 depends on SPL_FOOTPRINT_LIMIT
143 When non-zero, the linker checks that the actual memory used by SPL
144 from _start to __bss_end does not exceed it.
146 config SPL_SYS_STACK_F_CHECK_BYTE
150 Constant used to check the stack
152 config SPL_SYS_REPORT_STACK_F_USAGE
153 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
154 bool "Check and report stack usage in SPL before relocation"
156 If this option is enabled, the initial SPL stack is filled with 0xaa
157 very early, up to the size configured with
158 SPL_SIZE_LIMIT_PROVIDE_STACK.
159 Later when SPL is done using this initial stack and switches to a
160 stack in DRAM, the actually used size of this initial stack is
161 reported by examining the memory and searching for the lowest
162 occurrence of non 0xaa bytes.
163 This default implementation works for stacks growing down only.
165 config SPL_SHOW_ERRORS
166 bool "Show more information when something goes wrong"
168 This enabled more verbose error messages and checking when something
169 goes wrong in SPL. For example, it shows the error code when U-Boot
170 cannot be located. This can help to diagnose the problem and figure
171 out a fix, particularly during development.
173 This adds a small amount to SPL code size, perhaps 100 bytes.
175 config SPL_BINMAN_SYMBOLS
176 bool "Declare binman symbols in SPL"
177 depends on SPL_FRAMEWORK && BINMAN
180 This enables use of symbols in SPL which refer to U-Boot, enabling SPL
181 to obtain the location of U-Boot simply by calling spl_get_image_pos()
182 and spl_get_image_size().
184 For this to work, you must have a U-Boot image in the binman image, so
185 binman can update SPL with the location of it.
187 menu "PowerPC and LayerScape SPL Boot options"
190 bool "Load SPL from NAND flash"
191 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
194 bool "Load SPL from SD Card / eMMC"
195 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
198 bool "Load SPL from SPI flash"
199 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
202 bool "Create SPL in Freescale PBI format"
203 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
206 Create boot binary having SPL binary in PBI format concatenated with
209 config SPL_SYS_CCSR_DO_NOT_RELOCATE
210 bool "Ensures that CCSR is not relocated"
213 If this is defined, then CONFIG_SYS_CCSRBAR_PHYS will be forced to a
214 value that ensures that CCSR is not relocated.
216 config TPL_SYS_CCSR_DO_NOT_RELOCATE
218 depends on SPL_SYS_CCSR_DO_NOT_RELOCATE
222 menu "PowerPC SPL specific options"
223 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
225 config SPL_INIT_MINIMAL
226 bool "Arch init code will be built for a very small image"
228 config SPL_FLUSH_IMAGE
229 bool "Clean dcache and invalidate icache after loading the image"
231 config SPL_SKIP_RELOCATE
232 bool "Skip relocating SPL"
237 bool "Pass hand-off information from SPL to U-Boot proper"
238 depends on SPL && BLOBLIST
240 It is useful to be able to pass information from SPL to U-Boot
241 proper to preserve state that is known in SPL and is needed in U-Boot.
242 Enable this to locate the handoff information in U-Boot proper, early
243 in boot. It is available in gd->handoff. The state state is set up
244 in SPL (or TPL if that is being used).
249 bool "Pass hand-off information from SPL to U-Boot proper"
250 depends on HANDOFF && SPL_BLOBLIST
253 This option enables SPL to write handoff information. This can be
254 used to pass information like the size of SDRAM from SPL to U-Boot
255 proper. Also SPL can receive information from TPL in the same place
259 string "Linker script for the SPL stage"
260 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
262 The SPL stage will usually require a different linker-script
263 (as it runs from a different memory region) than the regular
264 U-Boot stage. Set this to the path of the linker-script to
269 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
270 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
271 default 0x20060 if SUN50I_GEN_H6
272 default 0x00060 if ARCH_SUNXI
273 default 0xfffc0000 if ARCH_ZYNQMP
276 The address in memory that SPL will be running from.
278 config SPL_BOARD_INIT
279 bool "Call board-specific initialization in SPL"
281 If this option is enabled, U-Boot will call the function
282 spl_board_init() from board_init_r(). This function should be
283 provided by the board.
285 config VPL_BOARD_INIT
286 bool "Call board-specific initialization in VPL"
288 If this option is enabled, U-Boot will call the function
289 spl_board_init() from board_init_r(). This function should be
290 provided by the board.
292 config SPL_BOOTROM_SUPPORT
293 bool "Support returning to the BOOTROM"
295 Some platforms (e.g. the Rockchip RK3368) provide support in their
296 ROM for loading the next boot-stage after performing basic setup
299 Enable this option, to return to the BOOTROM through the
300 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
301 boot device list, if not implemented for a given board)
303 config SPL_BOOTCOUNT_LIMIT
304 bool "Support bootcount in SPL"
305 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
307 On some boards, which use 'falcon' mode, it is necessary to check
308 and increment the number of boot attempts. Such boards do not
309 use proper U-Boot for normal boot flow and hence needs those
310 adjustments to be done in the SPL.
312 config SPL_RAW_IMAGE_SUPPORT
313 bool "Support SPL loading and booting of RAW images"
314 default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
316 depends on !TI_SECURE_DEVICE
318 SPL will support loading and booting a RAW image when this option
319 is y. If this is not set, SPL will move on to other available
320 boot media to find a suitable image.
322 config SPL_LEGACY_IMAGE_FORMAT
323 bool "Support SPL loading and booting of Legacy images"
324 default y if !SPL_LOAD_FIT
325 depends on !TI_SECURE_DEVICE
327 SPL will support loading and booting Legacy images when this option
328 is y. If this is not set, SPL will move on to other available
329 boot media to find a suitable image.
331 config SPL_LEGACY_IMAGE_CRC_CHECK
332 bool "Check CRC of Legacy images"
333 depends on SPL_LEGACY_IMAGE_FORMAT
336 Enable this to check the CRC of Legacy images. While this increases
337 reliability, it affects both code size and boot duration.
338 If disabled, Legacy images are booted if the image magic and size
339 are correct, without further integrity checks.
341 config SPL_SYS_MALLOC_SIMPLE
343 prompt "Only use malloc_simple functions in the SPL"
345 Say Y here to only use the *_simple malloc functions from
346 malloc_simple.c, rather then using the versions from dlmalloc.c;
347 this will make the SPL binary smaller at the cost of more heap
348 usage as the *_simple malloc functions do not re-use free-ed mem.
350 config TPL_SYS_MALLOC_SIMPLE
352 prompt "Only use malloc_simple functions in the TPL"
355 Say Y here to only use the *_simple malloc functions from
356 malloc_simple.c, rather then using the versions from dlmalloc.c;
357 this will make the TPL binary smaller at the cost of more heap
358 usage as the *_simple malloc functions do not re-use free-ed mem.
361 bool "Enable SDRAM location for SPL stack"
363 SPL starts off execution in SRAM and thus typically has only a small
364 stack available. Since SPL sets up DRAM while in its board_init_f()
365 function, it is possible for the stack to move there before
366 board_init_r() is reached. This option enables a special SDRAM
367 location for the SPL stack. U-Boot SPL switches to this after
368 board_init_f() completes, and before board_init_r() starts.
370 config SPL_STACK_R_ADDR
371 depends on SPL_STACK_R
372 hex "SDRAM location for SPL stack"
373 default 0x82000000 if ARCH_OMAP2PLUS
375 Specify the address in SDRAM for the SPL stack. This will be set up
376 before board_init_r() is called.
378 config SPL_STACK_R_MALLOC_SIMPLE_LEN
379 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
380 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
383 Specify the amount of the stack to use as memory pool for
384 malloc_simple after switching the stack to DRAM. This may be set
385 to give board_init_r() a larger heap then the initial heap in
386 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
388 config SPL_SEPARATE_BSS
389 bool "BSS section is in a different memory region from text"
391 Some platforms need a large BSS region in SPL and can provide this
392 because RAM is already set up. In this case BSS can be moved to RAM.
393 This option should then be enabled so that the correct device tree
394 location is used. Normally we put the device tree at the end of BSS
395 but with this option enabled, it goes at _image_binary_end.
399 depends on SPL_OF_PLATDATA
400 # Bind cannot be supported because the udevice structs are in read-only
401 # memory so we cannot update the linked lists.
402 select SPL_OF_PLATDATA_NO_BIND
403 select SPL_OF_PLATDATA_RT
405 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
406 section of memory. This means that of-platdata must make a copy (in
407 writeable memory) of anything it wants to modify, such as
410 config TPL_SEPARATE_BSS
411 bool "BSS section is in a different memory region from text"
412 default y if SPL_SEPARATE_BSS
414 Some platforms need a large BSS region in TPL and can provide this
415 because RAM is already set up. In this case BSS can be moved to RAM.
416 This option should then be enabled so that the correct device tree
417 location is used. Normally we put the device tree at the end of BSS
418 but with this option enabled, it goes at _image_binary_end.
420 config SPL_BANNER_PRINT
421 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
424 If this option is enabled, SPL will print the banner with version
425 info. Disabling this option could be useful to reduce SPL boot time
426 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
428 config TPL_BANNER_PRINT
429 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
433 If this option is enabled, TPL will print the banner with version
434 info. Disabling this option could be useful to reduce TPL boot time
435 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
438 depends on ARM && !ARM64
439 bool "Allows initializing BSS early before entering board_init_f"
441 On some platform we have sufficient memory available early on to
442 allow setting up and using a basic BSS prior to entering
443 board_init_f. Activating this option will also de-activate the
444 clearing of BSS during the SPL relocation process, thus allowing
445 to carry state from board_init_f to board_init_r by way of BSS.
447 config SPL_DISPLAY_PRINT
448 bool "Display a board-specific message in SPL"
450 If this option is enabled, U-Boot will call the function
451 spl_display_print() immediately after displaying the SPL console
452 banner ("U-Boot SPL ..."). This function should be provided by
455 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
456 bool "MMC raw mode: by sector"
457 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
458 ARCH_MX6 || ARCH_MX7 || \
459 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
460 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
461 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
462 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
464 Use sector number for specifying U-Boot location on MMC/SD in
467 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
468 hex "Address on the MMC to load U-Boot from"
469 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
470 default 0x40 if ARCH_SUNXI
471 default 0x75 if ARCH_DAVINCI
472 default 0x8a if ARCH_MX6 || ARCH_MX7
473 default 0x100 if ARCH_UNIPHIER
474 default 0x0 if ARCH_MVEBU
475 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
476 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
477 OMAP54XX || AM33XX || AM43XX || ARCH_K3
478 default 0x4000 if ARCH_ROCKCHIP
479 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
481 Address on the MMC to load U-Boot from, when the MMC is being used
482 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
484 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
485 hex "U-Boot main hardware partition image offset"
486 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
487 default 0x10 if ARCH_SUNXI
490 On some platforms SPL location depends on hardware partition. The ROM
491 code skips the MBR sector when loading SPL from main hardware data
492 partition. This adds offset to the main U-Boot image. Set this symbol
493 to the number of skipped sectors.
495 If unsure, leave the default.
497 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
498 bool "MMC Raw mode: by partition"
500 Use a partition for loading U-Boot when using MMC/SD in raw mode.
502 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
503 hex "Partition to use to load U-Boot from"
504 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
507 Partition on the MMC to load U-Boot from when the MMC is being
510 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
511 bool "MMC raw mode: by partition type"
512 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
514 Use partition type for specifying U-Boot partition on MMC/SD in
515 raw mode. U-Boot will be loaded from the first partition of this
518 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
519 hex "Partition Type on the MMC to load U-Boot from"
520 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
522 Partition Type on the MMC to load U-Boot from, when the MMC is being
525 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
526 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
527 depends on SUPPORT_EMMC_BOOT
529 eMMC boot partition is normally configured by the bits of the EXT_CSD
530 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
531 cases it might be required in SPL to load the image from different
532 partition than the partition selected by EXT_CSC_PART_CONFIG register.
533 Enable this option if you intend to use an eMMC boot partition other
534 then selected via EXT_CSC_PART_CONFIG register and specify the custom
535 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
538 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
539 int "Number of the eMMC boot partition to use"
540 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
543 eMMC boot partition number to use when the eMMC in raw mode and
544 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
545 by user defined partition number.
549 default y if SPL_LEGACY_IMAGE_FORMAT || SPL_EFI_PARTITION
550 default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
552 Enable this to support CRC32 in uImages or FIT images within SPL.
553 This is a 32-bit checksum value that can be used to verify images.
554 For FIT images, this is the least secure type of checksum, suitable
555 for detected accidental image corruption. For secure applications you
556 should consider SHA1 or SHA256.
562 Enable this to support MD5 in FIT images within SPL. An MD5
563 checksum is a 128-bit hash value used to check that the image
564 contents have not been corrupted. Note that MD5 is not considered
565 secure as it is possible (with a brute-force attack) to adjust the
566 image while still retaining the same MD5 hash value. For secure
567 applications where images may be changed maliciously, you should
568 consider SHA256 or SHA384.
570 config SPL_FIT_IMAGE_TINY
571 bool "Remove functionality from SPL FIT loading to reduce size"
573 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
574 default y if ARCH_IMX8M
576 Enable this to reduce the size of the FIT image loading code
577 in SPL, if space for the SPL binary is very tight.
579 This skips the recording of each loaded payload
580 (i.e. loadable) into the FDT (modifying the loaded FDT to
581 ensure this information is available to the next image
585 bool "Support CACHE drivers"
587 Enable CACHE drivers in SPL. These drivers can keep data so that
588 future requests for that data can be served faster. Enable this option
589 to build the drivers in drivers/cache as part of an SPL build.
592 bool "Support CPU drivers"
594 Enable this to support CPU drivers in SPL. These drivers can set
595 up CPUs and provide information about them such as the model and
596 name. This can be useful in SPL since setting up the CPUs earlier
597 may improve boot performance. Enable this option to build the
598 drivers in drivers/cpu as part of an SPL build.
601 bool "Support crypto drivers"
603 Enable crypto drivers in SPL. These drivers can be used to
604 accelerate secure boot processing in secure applications. Enable
605 this option to build the drivers in drivers/crypto as part of an
609 bool "Support DMA drivers"
611 Enable DMA (direct-memory-access) drivers in SPL. These drivers
612 can be used to handle memory-to-peripheral data transfer without
613 the CPU moving the data. Enable this option to build the drivers
614 in drivers/dma as part of an SPL build.
616 config SPL_DRIVERS_MISC
617 bool "Support misc drivers"
619 Enable miscellaneous drivers in SPL. These drivers perform various
620 tasks that don't fall nicely into other categories, Enable this
621 option to build the drivers in drivers/misc as part of an SPL
622 build, for those that support building in SPL (not all drivers do).
624 config SPL_ENV_SUPPORT
625 bool "Support an environment"
627 Enable environment support in SPL. The U-Boot environment provides
628 a number of settings (essentially name/value pairs) which can
629 control many aspects of U-Boot's operation. Normally this is not
630 needed in SPL as it has a much simpler task with less
631 configuration. But some boards use this to support 'Falcon' boot
632 on EXT2 and FAT, where SPL boots directly into Linux without
633 starting U-Boot first. Enabling this option will make env_get()
634 and env_set() available in SPL.
637 bool "Support save environment"
638 depends on SPL_ENV_SUPPORT
639 select SPL_MMC_WRITE if ENV_IS_IN_MMC
641 Enable save environment support in SPL after setenv. By default
642 the saveenv option is not provided in SPL, but some boards need
643 this support in 'Falcon' boot, where SPL need to boot from
644 different images based on environment variable set by OS. For
645 example OS may set "reboot_image" environment variable to
646 "recovery" inorder to boot recovery image by SPL. The SPL read
647 "reboot_image" and act accordingly and change the reboot_image
648 to default mode using setenv and save the environment.
651 bool "Support Ethernet"
652 depends on SPL_ENV_SUPPORT
655 Enable access to the network subsystem and associated Ethernet
656 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
657 link rather than from an on-board peripheral. Environment support
658 is required since the network stack uses a number of environment
659 variables. See also SPL_NET.
662 bool "Support EXT filesystems"
664 Enable support for EXT2/3/4 filesystems with SPL. This permits
665 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
666 filesystem from within SPL. Support for the underlying block
667 device (e.g. MMC or USB) must be enabled separately.
669 config SPL_FS_SQUASHFS
670 bool "Support SquashFS filesystems"
673 Enable support for SquashFS filesystems with SPL. This permits
674 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
675 filesystem from within SPL. Support for the underlying block
676 device (e.g. MMC or USB) must be enabled separately.
679 bool "Support FAT filesystems"
682 Enable support for FAT and VFAT filesystems with SPL. This
683 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
684 filesystem from within SPL. Support for the underlying block
685 device (e.g. MMC or USB) must be enabled separately.
687 config SPL_FS_LOAD_PAYLOAD_NAME
688 string "File to load for U-Boot from the filesystem"
689 depends on SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS
690 default "tispl.bin" if SYS_K3_SPL_ATF
691 default "u-boot.itb" if SPL_LOAD_FIT
694 Filename to read to load U-Boot when reading from filesystem.
696 config SPL_FS_LOAD_KERNEL_NAME
697 string "File to load for the OS kernel from the filesystem"
698 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
701 Filename to read to load for the OS kernel when reading from the
704 config SPL_FS_LOAD_ARGS_NAME
705 string "File to load for the OS kernel argument parameters from the filesystem"
706 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
709 Filename to read to load for the OS kernel argument parameters from
713 bool "Support write for FAT filesystems"
715 Enable write support for FAT and VFAT filesystems with SPL.
716 Support for the underlying block device (e.g. MMC or USB) must be
722 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
723 provide software-configurable hardware which is typically used to
724 implement peripherals (such as UARTs, LCD displays, MMC) or
725 accelerate custom processing functions, such as image processing
726 or machine learning. Sometimes it is useful to program the FPGA
727 as early as possible during boot, and this option can enable that
731 bool "Support GPIO in SPL"
733 Enable support for GPIOs (General-purpose Input/Output) in SPL.
734 GPIOs allow U-Boot to read the state of an input line (high or
735 low) and set the state of an output line. This can be used to
736 drive LEDs, control power to various system parts and read user
737 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
738 for example. Enable this option to build the drivers in
739 drivers/gpio as part of an SPL build.
744 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
745 I2C works with a clock and data line which can be driven by a
746 one or more masters or slaves. It is a fairly complex bus but is
747 widely used as it only needs two lines for communication. Speeds of
748 400kbps are typical but up to 3.4Mbps is supported by some
749 hardware. I2C can be useful in SPL to configure power management
750 ICs (PMICs) before raising the CPU clock speed, for example.
751 Enable this option to build the drivers in drivers/i2c as part of
754 config SPL_LIBCOMMON_SUPPORT
755 bool "Support common libraries"
757 Enable support for common U-Boot libraries within SPL. These
758 libraries include common code to deal with U-Boot images,
759 environment and USB, for example. This option is enabled on many
760 boards. Enable this option to build the code in common/ as part of
763 config SPL_LIBDISK_SUPPORT
764 bool "Support disk partitions"
767 Enable support for disk partitions within SPL. 'Disk' is something
768 of a misnomer as it includes non-spinning media such as flash (as
769 used in MMC and USB sticks). Partitions provide a way for a disk
770 to be split up into separate regions, with a partition table placed
771 at the start or end which describes the location and size of each
772 'partition'. These partitions are typically uses as individual block
773 devices, typically with an EXT2 or FAT filesystem in each. This
774 option enables whatever partition support has been enabled in
775 U-Boot to also be used in SPL. It brings in the code in disk/.
777 config SPL_LIBGENERIC_SUPPORT
778 bool "Support generic libraries"
780 Enable support for generic U-Boot libraries within SPL. These
781 libraries include generic code to deal with device tree, hashing,
782 printf(), compression and the like. This option is enabled on many
783 boards. Enable this option to build the code in lib/ as part of an
786 config SPL_DM_MAILBOX
787 bool "Support Mailbox"
789 Enable support for Mailbox within SPL. This enable the inter
790 processor communication protocols tobe used within SPL. Enable
791 this option to build the drivers in drivers/mailbox as part of
797 select HAVE_BLOCK_DEVICE
799 Enable support for MMC (Multimedia Card) within SPL. This enables
800 the MMC protocol implementation and allows any enabled drivers to
801 be used within SPL. MMC can be used with or without disk partition
802 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
803 this option to build the drivers in drivers/mmc as part of an SPL
806 config SYS_MMCSD_FS_BOOT_PARTITION
807 int "MMC Boot Partition"
810 Partition on the MMC to load U-Boot from when the MMC is being
812 Use -1 as a special value to use the first bootable partition.
815 bool "Tiny MMC framework in SPL"
818 Enable MMC framework tinification support. This option is useful if
819 if your SPL is extremely size constrained. Heed the warning, enable
820 this option if and only if you know exactly what you are doing, if
821 you are reading this help text, you most likely have no idea :-)
823 The MMC framework is reduced to bare minimum to be useful. No malloc
824 support is needed for the MMC framework operation with this option
825 enabled. The framework supports exactly one MMC device and exactly
826 one MMC driver. The MMC driver can be adjusted to avoid any malloc
827 operations too, which can remove the need for malloc support in SPL
828 and thus further reduce footprint.
831 bool "MMC/SD/SDIO card support for write operations in SPL"
834 Enable write access to MMC and SD Cards in SPL
837 config SPL_MPC8XXX_INIT_DDR
838 bool "Support MPC8XXX DDR init"
840 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
841 random-access memory) on the MPC8XXX family within SPL. This
842 allows DRAM to be set up before loading U-Boot into that DRAM,
845 config SPL_MTD_SUPPORT
846 bool "Support MTD drivers"
848 Enable support for MTD (Memory Technology Device) within SPL. MTD
849 provides a block interface over raw NAND and can also be used with
850 SPI flash. This allows SPL to load U-Boot from supported MTD
851 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
852 to enable specific MTD drivers.
855 bool "Support new Mentor Graphics USB"
857 Enable support for Mentor Graphics USB in SPL. This is a new
858 driver used by some boards. Enable this option to build
859 the drivers in drivers/usb/musb-new as part of an SPL build. The
860 old drivers are in drivers/usb/musb.
862 config SPL_NAND_SUPPORT
863 bool "Support NAND flash"
865 Enable support for NAND (Negative AND) flash in SPL. NAND flash
866 can be used to allow SPL to load U-Boot from supported devices.
867 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
870 config SPL_NAND_RAW_ONLY
871 bool "Support to boot only raw u-boot.bin images"
872 depends on SPL_NAND_SUPPORT
874 Use this only if you need to save space.
876 config SPL_NAND_DRIVERS
877 bool "Use standard NAND driver"
879 SPL uses normal NAND drivers, not minimal drivers.
882 bool "Include standard ECC in SPL"
884 config SPL_NAND_SOFTECC
885 bool "Use software ECC in SPL"
886 depends on SPL_NAND_ECC
888 config SPL_NAND_SIMPLE
889 bool "Support simple NAND drivers in SPL"
891 Support for NAND boot using simple NAND drivers that
892 expose the cmd_ctrl() interface.
895 depends on SPL_NAND_DRIVERS
896 bool "Use Base NAND Driver"
898 Include nand_base.c in the SPL.
900 config SPL_NAND_IDENT
901 depends on SPL_NAND_BASE
902 bool "Use chip ID to identify NAND flash"
904 SPL uses the chip ID list to identify the NAND flash.
909 Enable support for loading payloads from UBI. See
910 README.ubispl for more info.
914 bool "Support SPI DM drivers in SPL"
916 Enable support for SPI DM drivers in SPL.
918 config SPL_DM_SPI_FLASH
919 bool "Support SPI DM FLASH drivers in SPL"
921 Enable support for SPI DM flash drivers in SPL.
925 config SPL_UBI_LOAD_BY_VOLNAME
926 bool "Support loading volumes by name"
928 This enables support for loading UBI volumes by name. When this
929 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
930 configure the volume name from which to load U-Boot.
932 config SPL_UBI_MAX_VOL_LEBS
933 int "Maximum number of LEBs per volume"
936 The maximum number of logical eraseblocks which a static volume
937 to load can contain. Used for sizing the scan data structure.
939 config SPL_UBI_MAX_PEB_SIZE
940 int "Maximum PEB size"
943 The maximum physical erase block size.
945 config SPL_UBI_MAX_PEBS
946 int "Maximum number of PEBs"
949 The maximum physical erase block size. If not overridden by
950 board code, this value will be used as the actual number of PEBs.
952 config SPL_UBI_PEB_OFFSET
953 int "Offset to first UBI PEB"
956 The offset in number of PEBs from the start of flash to the first
957 PEB part of the UBI image.
959 config SPL_UBI_VID_OFFSET
960 int "Offset to VID header"
963 config SPL_UBI_LEB_START
964 int "Offset to LEB in PEB"
967 The offset in bytes to the LEB within a PEB.
969 config SPL_UBI_INFO_ADDR
970 hex "Address to place UBI scan info"
973 Address for ubispl to place the scan info. Read README.ubispl to
974 determine the required size
976 config SPL_UBI_VOL_IDS
977 int "Maximum volume id"
980 The maximum volume id which can be loaded. Used for sizing the
983 config SPL_UBI_LOAD_MONITOR_ID
984 int "id of U-Boot volume"
987 The UBI volume id from which to load U-Boot
989 config SPL_UBI_LOAD_MONITOR_VOLNAME
990 string "volume name of U-Boot volume"
991 depends on SPL_UBI_LOAD_BY_VOLNAME
993 The UBI volume name from which to load U-Boot
995 config SPL_UBI_LOAD_KERNEL_ID
996 int "id of kernel volume"
997 depends on SPL_OS_BOOT && SPL_UBI
999 The UBI volume id from which to load the kernel
1001 config SPL_UBI_LOAD_ARGS_ID
1002 int "id of kernel args volume"
1003 depends on SPL_OS_BOOT && SPL_UBI
1005 The UBI volume id from which to load the device tree
1007 config UBI_SPL_SILENCE_MSG
1008 bool "silence UBI SPL messages"
1010 Disable messages from UBI SPL. This leaves warnings
1016 bool "Support networking"
1018 Enable support for network devices (such as Ethernet) in SPL.
1019 This permits SPL to load U-Boot over a network link rather than
1020 from an on-board peripheral. Environment support is required since
1021 the network stack uses a number of environment variables. See also
1025 config SPL_NET_VCI_STRING
1026 string "BOOTP Vendor Class Identifier string sent by SPL"
1028 As defined by RFC 2132 the vendor class identifier field can be
1029 sent by the client to identify the vendor type and configuration
1030 of a client. This is often used in practice to allow for the DHCP
1031 server to specify different files to load depending on if the ROM,
1032 SPL or U-Boot itself makes the request
1035 config SPL_NO_CPU_SUPPORT
1036 bool "Drop CPU code in SPL"
1038 This is specific to the ARM926EJ-S CPU. It disables the standard
1039 start.S start-up code, presumably so that a replacement can be
1040 used on that CPU. You should not enable it unless you know what
1043 config SPL_NOR_SUPPORT
1044 bool "Support NOR flash"
1046 Enable support for loading U-Boot from memory-mapped NOR (Negative
1047 OR) flash in SPL. NOR flash is slow to write but fast to read, and
1048 a memory-mapped device makes it very easy to access. Loading from
1049 NOR is typically achieved with just a memcpy().
1051 config SPL_XIP_SUPPORT
1055 Enable support for execute in place of U-Boot or kernel image. There
1056 is no need to copy image from flash to ram if flash supports execute
1057 in place. Its very useful in systems having enough flash but not
1058 enough ram to load the image.
1060 config SPL_ONENAND_SUPPORT
1061 bool "Support OneNAND flash"
1063 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
1064 a type of NAND flash and therefore can be used to allow SPL to
1065 load U-Boot from supported devices. This enables the drivers in
1066 drivers/mtd/onenand as part of an SPL build.
1069 bool "Activate Falcon Mode"
1070 depends on !TI_SECURE_DEVICE
1072 Enable booting directly to an OS from SPL.
1073 for more info read doc/README.falcon
1077 hex "addr, where OS is found"
1078 depends on SPL_NOR_SUPPORT
1080 Specify the address, where the OS image is found, which
1085 config SPL_FALCON_BOOT_MMCSD
1086 bool "Enable Falcon boot from MMC or SD media"
1087 depends on SPL_OS_BOOT && SPL_MMC
1089 Select this if the Falcon mode OS image mode is on MMC or SD media.
1091 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
1092 hex "Falcon mode: Sector to load kernel uImage from MMC"
1093 depends on SPL_FALCON_BOOT_MMCSD
1095 When Falcon mode is used with an MMC or SD media, SPL needs to know
1096 where to look for the kernel uImage. The image is expected to begin
1097 at the raw MMC specified in this config.
1098 Note that the Falcon mode image can also be a FIT, if FIT support is
1102 string "SPL payload"
1103 default "tpl/u-boot-with-tpl.bin" if TPL
1104 default "u-boot.bin"
1106 Payload for SPL boot. For backward compatibility, default to
1107 u-boot.bin, i.e. RAW image without any header. In case of
1108 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1112 bool "Support PCI drivers"
1114 Enable support for PCI in SPL. For platforms that need PCI to boot,
1115 or must perform some init using PCI in SPL, this provides the
1116 necessary driver support. This enables the drivers in drivers/pci
1117 as part of an SPL build.
1120 bool "Support PCH drivers"
1122 Enable support for PCH (Platform Controller Hub) devices in SPL.
1123 These are used to set up GPIOs and the SPI peripheral early in
1124 boot. This enables the drivers in drivers/pch as part of an SPL
1127 config SPL_POST_MEM_SUPPORT
1128 bool "Support POST drivers"
1130 Enable support for POST (Power-on Self Test) in SPL. POST is a
1131 procedure that checks that the hardware (CPU or board) appears to
1132 be functionally correctly. It is a sanity check that can be
1133 performed before booting. This enables the drivers in post/drivers
1134 as part of an SPL build.
1137 bool "Support reset drivers"
1140 Enable support for reset control in SPL.
1141 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1142 by using the generic reset API provided by driver model.
1143 This enables the drivers in drivers/reset as part of an SPL build.
1146 bool "Support power drivers"
1148 Enable support for power control in SPL. This includes support
1149 for PMICs (Power-management Integrated Circuits) and some of the
1150 features provided by PMICs. In particular, voltage regulators can
1151 be used to enable/disable power and vary its voltage. That can be
1152 useful in SPL to turn on boot peripherals and adjust CPU voltage
1153 so that the clock speed can be increased. This enables the drivers
1154 in drivers/power, drivers/power/pmic and drivers/power/regulator
1155 as part of an SPL build.
1157 config SPL_POWER_DOMAIN
1158 bool "Support power domain drivers"
1161 Enable support for power domain control in SPL. Many SoCs allow
1162 power to be applied to or removed from portions of the SoC (power
1163 domains). This may be used to save power. This API provides the
1164 means to control such power management hardware. This enables
1165 the drivers in drivers/power/domain as part of a SPL build.
1167 config SPL_RAM_SUPPORT
1168 bool "Support booting from RAM"
1169 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1171 Enable booting of an image in RAM. The image can be preloaded or
1172 it can be loaded by SPL directly into RAM (e.g. using USB).
1174 config SPL_RAM_DEVICE
1175 bool "Support booting from preloaded image in RAM"
1176 depends on SPL_RAM_SUPPORT
1177 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1179 Enable booting of an image already loaded in RAM. The image has to
1180 be already in memory when SPL takes over, e.g. loaded by the boot
1183 config SPL_REMOTEPROC
1184 bool "Support REMOTEPROCS"
1186 Enable support for REMOTEPROCs in SPL. This permits to load
1187 a remote processor firmware in SPL.
1190 bool "Support RTC drivers"
1192 Enable RTC (Real-time Clock) support in SPL. This includes support
1193 for reading and setting the time. Some RTC devices also have some
1194 non-volatile (battery-backed) memory which is accessible if
1195 needed. This enables the drivers in drivers/rtc as part of an SPL
1199 bool "Support loading from SATA"
1201 Enable support for SATA (Serial AT attachment) in SPL. This allows
1202 use of SATA devices such as hard drives and flash drivers for
1203 loading U-Boot. SATA is used in higher-end embedded systems and
1204 can provide higher performance than MMC , at somewhat higher
1205 expense and power consumption. This enables loading from SATA
1206 using a configured device.
1208 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1209 bool "SATA raw mode: by sector"
1211 default y if ARCH_MVEBU
1213 Use sector number for specifying U-Boot location on SATA disk in
1216 config SPL_SATA_RAW_U_BOOT_SECTOR
1217 hex "Sector on the SATA disk to load U-Boot from"
1218 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1219 default 0x1 if ARCH_MVEBU
1221 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1222 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1225 bool "Support serial"
1229 Enable support for serial in SPL. This allows use of a serial UART
1230 for displaying messages while SPL is running. It also brings in
1231 printf() and panic() functions. This should normally be enabled
1232 unless there are space reasons not to. Even then, consider
1233 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1236 bool "Support SPI drivers"
1238 Enable support for using SPI in SPL. This is used for connecting
1239 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1240 more details on that. The SPI driver provides the transport for
1241 data between the SPI flash and the CPU. This option can be used to
1242 enable SPI drivers that are needed for other purposes also, such
1245 config SPL_SPI_FLASH_SUPPORT
1246 bool "Support SPI flash drivers"
1249 Enable support for using SPI flash in SPL, and loading U-Boot from
1250 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1251 the SPI bus that is used to connect it to a system. It is a simple
1252 but fast bidirectional 4-wire bus (clock, chip select and two data
1253 lines). This enables the drivers in drivers/mtd/spi as part of an
1254 SPL build. This normally requires SPL_SPI.
1256 if SPL_SPI_FLASH_SUPPORT
1258 config SPL_SPI_FLASH_TINY
1259 bool "Enable low footprint SPL SPI Flash support"
1260 depends on !SPI_FLASH_BAR
1261 default y if SPI_FLASH
1263 Enable lightweight SPL SPI Flash support that supports just reading
1264 data/images from flash. No support to write/erase flash. Enable
1265 this if you have SPL size limitations and don't need full
1266 fledged SPI flash support.
1268 config SPL_SPI_FLASH_SFDP_SUPPORT
1269 bool "SFDP table parsing support for SPI NOR flashes"
1270 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1272 Enable support for parsing and auto discovery of parameters for
1273 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1274 tables as per JESD216 standard in SPL.
1276 config SPL_SPI_FLASH_MTD
1277 bool "Support for SPI flash MTD drivers in SPL"
1279 Enable support for SPI flash MTD drivers in SPL.
1282 bool "Support loading from SPI flash"
1284 Enable support for loading next stage, U-Boot or otherwise, from
1285 SPI NOR in U-Boot SPL.
1287 endif # SPL_SPI_FLASH_SUPPORT
1289 config SYS_SPI_U_BOOT_OFFS
1290 hex "address of u-boot payload in SPI flash"
1291 default 0x8000 if ARCH_SUNXI
1293 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1295 Address within SPI-Flash from where the u-boot payload is fetched
1299 bool "Driver support for thermal devices"
1301 Enable support for temperature-sensing devices. Some SoCs have on-chip
1302 temperature sensors to permit warnings, speed throttling or even
1303 automatic power-off when the temperature gets too high or low. Other
1304 devices may be discrete but connected on a suitable bus.
1307 bool "Support USB host drivers"
1308 select HAVE_BLOCK_DEVICE
1310 Enable access to USB (Universal Serial Bus) host devices so that
1311 SPL can load U-Boot from a connected USB peripheral, such as a USB
1312 flash stick. While USB takes a little longer to start up than most
1313 buses, it is very flexible since many different types of storage
1314 device can be attached. This option enables the drivers in
1315 drivers/usb/host as part of an SPL build.
1317 config SPL_USB_STORAGE
1318 bool "Support loading from USB"
1319 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1321 Enable support for USB devices in SPL. This allows use of USB
1322 devices such as hard drives and flash drivers for loading U-Boot.
1323 The actual drivers are enabled separately using the normal U-Boot
1324 config options. This enables loading from USB using a configured
1327 config SPL_USB_GADGET
1328 bool "Suppport USB Gadget drivers"
1330 Enable USB Gadget API which allows to enable USB device functions
1335 config SPL_USB_ETHER
1336 bool "Support USB Ethernet drivers"
1339 Enable access to the USB network subsystem and associated
1340 drivers in SPL. This permits SPL to load U-Boot over a
1341 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1342 than from an onboard peripheral. Environment support is required
1343 since the network stack uses a number of environment variables.
1344 See also SPL_NET and SPL_ETH.
1347 bool "Support DFU (Device Firmware Upgrade)"
1349 select SPL_DFU_NO_RESET
1350 depends on SPL_RAM_SUPPORT
1352 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1353 RAM memory device support. The ROM code will load and execute
1354 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1355 selected device partition from host-pc using dfu-utils.
1356 This feature is useful to flash the binaries to factory or bare-metal
1357 boards using USB interface.
1360 bool "DFU device selection"
1365 depends on SPL_DFU && SPL_RAM_SUPPORT
1367 select RAM/DDR memory device for loading binary images
1368 (u-boot/kernel) to the selected device partition using
1369 DFU and execute the u-boot/kernel from RAM.
1373 config SPL_USB_SDP_SUPPORT
1374 bool "Support SDP (Serial Download Protocol)"
1375 depends on SPL_SERIAL
1377 Enable Serial Download Protocol (SDP) device support in SPL. This
1378 allows to download images into memory and execute (jump to) them
1379 using the same protocol as implemented by the i.MX family's boot ROM.
1381 config SPL_SDP_USB_DEV
1382 int "SDP USB controller index"
1384 depends on SPL_USB_SDP_SUPPORT
1386 Some boards have USB controller other than 0. Define this option
1387 so it can be used in compiled environment.
1391 bool "Support watchdog drivers"
1392 imply SPL_WDT if !HW_WATCHDOG
1394 Enable support for watchdog drivers in SPL. A watchdog is
1395 typically a hardware peripheral which can reset the system when it
1396 detects no activity for a while (such as a software crash). This
1397 enables the drivers in drivers/watchdog as part of an SPL build.
1399 config SPL_YMODEM_SUPPORT
1400 bool "Support loading using Ymodem"
1401 depends on SPL_SERIAL
1403 While loading from serial is slow it can be a useful backup when
1404 there is no other option. The Ymodem protocol provides a reliable
1405 means of transmitting U-Boot over a serial line for using in SPL,
1406 with a checksum to ensure correctness.
1409 bool "Support ARM Trusted Firmware"
1410 depends on ARM64 && SPL_FIT
1412 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1413 is loaded by SPL (which is considered as BL2 in ATF terminology).
1414 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1416 config SPL_ATF_LOAD_IMAGE_V2
1417 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1420 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1422 If you want to load a bl31 image from the SPL and need the new
1425 config SPL_ATF_NO_PLATFORM_PARAM
1426 bool "Pass no platform parameter"
1429 While we expect to call a pointer to a valid FDT (or NULL)
1430 as the platform parameter to an ATF, some ATF versions are
1431 not U-Boot aware and have an insufficiently robust parameter
1432 validation to gracefully reject a FDT being passed.
1434 If this option is enabled, the spl_atf os-type handler will
1435 always pass NULL for the platform parameter.
1437 If your ATF is affected, say Y.
1439 config SPL_AM33XX_ENABLE_RTC32K_OSC
1440 bool "Enable the RTC32K OSC on AM33xx based platforms"
1443 Enable access to the AM33xx RTC and select the external 32kHz clock
1446 config SPL_OPTEE_IMAGE
1447 bool "Support OP-TEE Trusted OS image in SPL"
1450 OP-TEE is an open source Trusted OS which is loaded by SPL.
1451 More detail at: https://github.com/OP-TEE/optee_os
1454 bool "Support RISC-V OpenSBI"
1455 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1457 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1458 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1459 firmware. It is loaded and started by U-Boot SPL.
1461 More details are available at https://github.com/riscv/opensbi and
1462 https://github.com/riscv/riscv-sbi-doc
1464 config SPL_OPENSBI_LOAD_ADDR
1465 hex "OpenSBI load address"
1466 depends on SPL_OPENSBI
1468 Load address of the OpenSBI binary.
1472 depends on SUPPORT_TPL
1475 If you want to build TPL as well as the normal image and SPL, say Y.
1479 config TPL_SIZE_LIMIT
1480 hex "Maximum size of TPL image"
1484 Specifies the maximum length of the U-Boot TPL image.
1485 If this value is zero, it is ignored.
1487 config TPL_BINMAN_SYMBOLS
1488 bool "Declare binman symbols in TPL"
1489 depends on SPL_FRAMEWORK && BINMAN
1492 This enables use of symbols in TPL which refer to U-Boot, enabling TPL
1493 to obtain the location of U-Boot simply by calling spl_get_image_pos()
1494 and spl_get_image_size().
1496 For this to work, you must have a U-Boot image in the binman image, so
1497 binman can update TPL with the location of it.
1499 config TPL_FRAMEWORK
1500 bool "Support TPL based upon the common SPL framework"
1501 default y if SPL_FRAMEWORK
1503 Enable the SPL framework under common/spl/ for TPL builds.
1504 This framework supports MMC, NAND and YMODEM and other methods
1505 loading of U-Boot's SPL stage. If unsure, say Y.
1508 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1509 depends on HANDOFF && TPL_BLOBLIST
1512 This option enables TPL to write handoff information. This can be
1513 used to pass information like the size of SDRAM from TPL to U-Boot
1514 proper. The information is also available to SPL if it is useful
1517 config TPL_BOARD_INIT
1518 bool "Call board-specific initialization in TPL"
1520 If this option is enabled, U-Boot will call the function
1521 spl_board_init() from board_init_r(). This function should be
1522 provided by the board.
1524 config TPL_BOOTCOUNT_LIMIT
1525 bool "Support bootcount in TPL"
1526 depends on TPL_ENV_SUPPORT
1528 If this option is enabled, the TPL will support bootcount.
1529 For example, it may be useful to choose the device to boot.
1532 string "Linker script for the TPL stage"
1534 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1535 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1537 The TPL stage will usually require a different linker-script
1538 (as it runs from a different memory region) than the regular
1539 U-Boot stage. Set this to the path of the linker-script to
1542 May be left empty to trigger the Makefile infrastructure to
1543 fall back to the linker-script used for the SPL stage.
1545 config TPL_NEEDS_SEPARATE_STACK
1546 bool "TPL needs a separate initial stack-pointer"
1549 Enable, if the TPL stage should not inherit its initial
1550 stack-pointer from the settings for the SPL stage.
1553 bool "Support power drivers"
1555 Enable support for power control in TPL. This includes support
1556 for PMICs (Power-management Integrated Circuits) and some of the
1557 features provided by PMICs. In particular, voltage regulators can
1558 be used to enable/disable power and vary its voltage. That can be
1559 useful in TPL to turn on boot peripherals and adjust CPU voltage
1560 so that the clock speed can be increased. This enables the drivers
1561 in drivers/power, drivers/power/pmic and drivers/power/regulator
1562 as part of an TPL build.
1564 config TPL_TEXT_BASE
1565 hex "Base address for the .text section of the TPL stage"
1568 The base address for the .text section of the TPL stage.
1571 hex "Maximum size (in bytes) for the TPL stage"
1572 default 0x2e000 if ROCKCHIP_RK3399
1573 default 0x8000 if ROCKCHIP_RK3288
1574 default 0x7000 if ROCKCHIP_RK322X || ROCKCHIP_RK3328 || ROCKCHIP_RK3368
1575 default 0x2800 if ROCKCHIP_PX30
1578 The maximum size (in bytes) of the TPL stage.
1581 hex "Offset to which the TPL should be padded before appending the TPL payload"
1582 depends on !TPL_FRAMEWORK && PPC
1583 default TPL_MAX_SIZE
1585 Image offset to which the TPL should be padded before appending the
1586 TPL payload. By default, this is defined as CONFIG_TPL_MAX_SIZE, or 0 if
1587 CONFIG_TPL_MAX_SIZE is undefined. CONFIG_TPL_PAD_TO must be either
1588 0, meaning to append the TPL payload without any padding, or >=
1589 CONFIG_TPL_MAX_SIZE.
1592 hex "Address of the initial stack-pointer for the TPL stage"
1593 depends on TPL_NEEDS_SEPARATE_STACK
1595 The address of the initial stack-pointer for the TPL stage.
1596 Usually this will be the (aligned) top-of-stack.
1598 config TPL_READ_ONLY
1600 depends on TPL_OF_PLATDATA
1601 select TPL_OF_PLATDATA_NO_BIND
1602 select TPL_OF_PLATDATA_RT
1604 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1605 section of memory. This means that of-platdata must make a copy (in
1606 writeable memory) of anything it wants to modify, such as
1607 device-private data.
1609 config TPL_BOOTROM_SUPPORT
1610 bool "Support returning to the BOOTROM (from TPL)"
1612 Some platforms (e.g. the Rockchip RK3368) provide support in their
1613 ROM for loading the next boot-stage after performing basic setup
1616 Enable this option, to return to the BOOTROM through the
1617 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1618 boot device list, if not implemented for a given board)
1621 bool "Support CRC32 in TPL"
1622 default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
1624 Enable this to support CRC32 in uImages or FIT images within SPL.
1625 This is a 32-bit checksum value that can be used to verify images.
1626 For FIT images, this is the least secure type of checksum, suitable
1627 for detected accidental image corruption. For secure applications you
1628 should consider SHA1 or SHA256.
1630 config TPL_DRIVERS_MISC
1631 bool "Support misc drivers in TPL"
1633 Enable miscellaneous drivers in TPL. These drivers perform various
1634 tasks that don't fall nicely into other categories, Enable this
1635 option to build the drivers in drivers/misc as part of an TPL
1636 build, for those that support building in TPL (not all drivers do).
1638 config TPL_ENV_SUPPORT
1639 bool "Support an environment"
1641 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1644 bool "Support GPIO in TPL"
1646 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1647 GPIOs allow U-Boot to read the state of an input line (high or
1648 low) and set the state of an output line. This can be used to
1649 drive LEDs, control power to various system parts and read user
1650 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1651 for example. Enable this option to build the drivers in
1652 drivers/gpio as part of an TPL build.
1657 Enable support for the I2C bus in TPL. See SPL_I2C for
1660 config TPL_LIBCOMMON_SUPPORT
1661 bool "Support common libraries"
1663 Enable support for common U-Boot libraries within TPL. See
1664 SPL_LIBCOMMON_SUPPORT for details.
1666 config TPL_LIBGENERIC_SUPPORT
1667 bool "Support generic libraries"
1669 Enable support for generic U-Boot libraries within TPL. See
1670 SPL_LIBGENERIC_SUPPORT for details.
1672 config TPL_MPC8XXX_INIT_DDR
1673 bool "Support MPC8XXX DDR init"
1675 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1676 SPL_MPC8XXX_INIT_DDR for details.
1682 Enable support for MMC within TPL. See SPL_MMC for details.
1684 config TPL_NAND_SUPPORT
1685 bool "Support NAND flash"
1687 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1690 bool "Support PCI drivers"
1692 Enable support for PCI in TPL. For platforms that need PCI to boot,
1693 or must perform some init using PCI in SPL, this provides the
1694 necessary driver support. This enables the drivers in drivers/pci
1695 as part of a TPL build.
1698 bool "Support PCH drivers"
1700 Enable support for PCH (Platform Controller Hub) devices in TPL.
1701 These are used to set up GPIOs and the SPI peripheral early in
1702 boot. This enables the drivers in drivers/pch as part of a TPL
1705 config TPL_RAM_SUPPORT
1706 bool "Support booting from RAM"
1708 Enable booting of an image in RAM. The image can be preloaded or
1709 it can be loaded by TPL directly into RAM (e.g. using USB).
1711 config TPL_RAM_DEVICE
1712 bool "Support booting from preloaded image in RAM"
1713 depends on TPL_RAM_SUPPORT
1715 Enable booting of an image already loaded in RAM. The image has to
1716 be already in memory when TPL takes over, e.g. loaded by the boot
1720 bool "Support RTC drivers"
1722 Enable RTC (Real-time Clock) support in TPL. This includes support
1723 for reading and setting the time. Some RTC devices also have some
1724 non-volatile (battery-backed) memory which is accessible if
1725 needed. This enables the drivers in drivers/rtc as part of an TPL
1729 bool "Support serial"
1733 Enable support for serial in TPL. See SPL_SERIAL for
1736 config TPL_SPI_FLASH_SUPPORT
1737 bool "Support SPI flash drivers"
1739 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1742 config TPL_SPI_FLASH_TINY
1743 bool "Enable low footprint TPL SPI Flash support"
1744 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1745 default y if SPI_FLASH
1747 Enable lightweight TPL SPI Flash support that supports just reading
1748 data/images from flash. No support to write/erase flash. Enable
1749 this if you have TPL size limitations and don't need full-fledged
1753 bool "Support loading from SPI flash"
1754 depends on TPL_SPI_FLASH_SUPPORT
1756 Enable support for loading next stage, U-Boot or otherwise, from
1757 SPI NOR in U-Boot TPL.
1760 bool "Support SPI drivers"
1762 Enable support for using SPI in TPL. See SPL_SPI for
1766 bool "Support SPI DM drivers in TPL"
1768 Enable support for SPI DM drivers in TPL.
1770 config TPL_DM_SPI_FLASH
1771 bool "Support SPI DM FLASH drivers in TPL"
1773 Enable support for SPI DM flash drivers in TPL.
1775 config TPL_YMODEM_SUPPORT
1776 bool "Support loading using Ymodem"
1777 depends on TPL_SERIAL
1779 While loading from serial is slow it can be a useful backup when
1780 there is no other option. The Ymodem protocol provides a reliable
1781 means of transmitting U-Boot over a serial line for using in TPL,
1782 with a checksum to ensure correctness.
1788 depends on SUPPORT_SPL
1791 If you want to build VPL as well as the normal image, TPL and SPL,
1796 config VPL_BANNER_PRINT
1797 bool "Enable output of the VPL banner 'U-Boot VPL ...'"
1801 If this option is enabled, VPL will print the banner with version
1802 info. Disabling this option could be useful to reduce VPL boot time
1803 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
1805 config VPL_BOARD_INIT
1806 bool "Call board-specific initialization in VPL"
1808 If this option is enabled, U-Boot will call the function
1809 spl_board_init() from board_init_r(). This function should be
1810 provided by the board.
1814 bool "Support cache drivers in VPL"
1816 Enable support for cache drivers in VPL.
1819 bool "Support CRC32 in VPL"
1820 default y if VPL_ENV_SUPPORT || VPL_BLOBLIST
1822 Enable this to support CRC32 in uImages or FIT images within VPL.
1823 This is a 32-bit checksum value that can be used to verify images.
1824 For FIT images, this is the least secure type of checksum, suitable
1825 for detected accidental image corruption. For secure applications you
1826 should consider SHA1 or SHA256.
1829 bool "Support SPI DM drivers in VPL"
1831 Enable support for SPI DM drivers in VPL.
1833 config VPL_DM_SPI_FLASH
1834 bool "Support SPI DM FLASH drivers in VPL"
1836 Enable support for SPI DM flash drivers in VPL.
1838 config VPL_FRAMEWORK
1839 bool "Support VPL based upon the common SPL framework"
1842 Enable the SPL framework under common/spl/ for VPL builds.
1843 This framework supports MMC, NAND and YMODEM and other methods
1844 loading of U-Boot's next stage. If unsure, say Y.
1847 bool "Pass hand-off information from VPL to SPL"
1848 depends on HANDOFF && VPL_BLOBLIST
1851 This option enables VPL to write handoff information. This can be
1852 used to pass information like the size of SDRAM from VPL to SPL. Also
1853 VPL can receive information from TPL in the same place if that is
1856 config VPL_LIBCOMMON_SUPPORT
1857 bool "Support common libraries"
1858 default y if SPL_LIBCOMMON_SUPPORT
1860 Enable support for common U-Boot libraries within VPL. See
1861 SPL_LIBCOMMON_SUPPORT for details.
1863 config VPL_LIBGENERIC_SUPPORT
1864 bool "Support generic libraries"
1865 default y if SPL_LIBGENERIC_SUPPORT
1867 Enable support for generic U-Boot libraries within VPL. These
1868 libraries include generic code to deal with device tree, hashing,
1869 printf(), compression and the like. This option is enabled on many
1870 boards. Enable this option to build the code in lib/ as part of a
1873 config VPL_DRIVERS_MISC
1874 bool "Support misc drivers"
1875 default y if TPL_DRIVERS_MISC
1877 Enable miscellaneous drivers in VPL. These drivers perform various
1878 tasks that don't fall nicely into other categories, Enable this
1879 option to build the drivers in drivers/misc as part of a VPL
1880 build, for those that support building in VPL (not all drivers do).
1882 config VPL_ENV_SUPPORT
1883 bool "Support an environment"
1885 Enable environment support in VPL. The U-Boot environment provides
1886 a number of settings (essentially name/value pairs) which can
1887 control many aspects of U-Boot's operation. Enabling this option will
1888 make env_get() and env_set() available in VSPL.
1891 bool "Support GPIO in VPL"
1892 default y if SPL_GPIO
1894 Enable support for GPIOs (General-purpose Input/Output) in VPL.
1895 GPIOs allow U-Boot to read the state of an input line (high or
1896 low) and set the state of an output line. This can be used to
1897 drive LEDs, control power to various system parts and read user
1898 input. GPIOs can be useful in VPL to enable a 'sign-of-life' LED,
1899 for example. Enable this option to build the drivers in
1900 drivers/gpio as part of a VPL build.
1903 bool "Pass hand-off information from VPL to SPL and U-Boot proper"
1904 depends on HANDOFF && VPL_BLOBLIST
1907 This option enables VPL to write handoff information. This can be
1908 used to pass information like the size of SDRAM from VPL to U-Boot
1909 proper. The information is also available to VPL if it is useful
1913 bool "Support hashing drivers in VPL"
1918 Enable hashing drivers in VPL. These drivers can be used to
1919 accelerate secure boot processing in secure applications. Enable
1920 this option to build system-specific drivers for hash acceleration
1921 as part of a VPL build.
1923 config VPL_I2C_SUPPORT
1924 bool "Support I2C in VPL"
1925 default y if SPL_I2C_SUPPORT
1927 Enable support for the I2C bus in VPL. Vee SPL_I2C_SUPPORT for
1930 config VPL_PCH_SUPPORT
1931 bool "Support PCH drivers"
1932 default y if TPL_PCH_SUPPORT
1934 Enable support for PCH (Platform Controller Hub) devices in VPL.
1935 These are used to set up GPIOs and the SPI peripheral early in
1936 boot. This enables the drivers in drivers/pch as part of a VPL
1940 bool "Support PCI drivers"
1941 default y if SPL_PCI
1943 Enable support for PCI in VPL. For platforms that need PCI to boot,
1944 or must perform some init using PCI in VPL, this provides the
1945 necessary driver support. This enables the drivers in drivers/pci
1946 as part of a VPL build.
1949 bool "Support RTC drivers"
1951 Enable RTC (Real-time Clock) support in VPL. This includes support
1952 for reading and setting the time. Some RTC devices also have some
1953 non-volatile (battery-backed) memory which is accessible if
1954 needed. This enables the drivers in drivers/rtc as part of a VPL
1958 bool "Support serial"
1959 default y if TPL_SERIAL
1963 Enable support for serial in VPL. See SPL_SERIAL_SUPPORT for
1966 config VPL_SIZE_LIMIT
1967 hex "Maximum size of VPL image"
1971 Specifies the maximum length of the U-Boot VPL image.
1972 If this value is zero, it is ignored.
1975 bool "Support SPI drivers"
1977 Enable support for using SPI in VPL. See SPL_SPI_SUPPORT for
1980 config VPL_SPI_FLASH_SUPPORT
1981 bool "Support SPI flash drivers"
1983 Enable support for using SPI flash in VPL, and loading U-Boot from
1984 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1985 the SPI bus that is used to connect it to a system. It is a simple
1986 but fast bidirectional 4-wire bus (clock, chip select and two data
1987 lines). This enables the drivers in drivers/mtd/spi as part of a
1988 VPL build. This normally requires VPL_SPI_SUPPORT.
1990 config VPL_TEXT_BASE
1994 The address in memory that VPL will be running from.
1998 config SPL_AT91_MCK_BYPASS
1999 bool "Use external clock signal as a source of main clock for AT91 platforms"
2000 depends on ARCH_AT91
2002 Use external 8 to 24 Mhz clock signal as source of main clock instead
2003 of an external crystal oscillator.
2004 This option disables the internal driving on the XOUT pin.
2005 The external source has to provide a stable clock on the XIN pin.
2006 If this option is disabled, the SoC expects a crystal oscillator
2007 that needs driving on both XIN and XOUT lines.