9 config SPL_DFU_NO_RESET
14 depends on SUPPORT_SPL
17 If you want to build SPL as well as the normal image, say Y.
20 bool "Support SPL based upon the common SPL framework"
24 Enable the SPL framework under common/spl/. This framework
25 supports MMC, NAND and YMODEM and other methods loading of U-Boot
26 and the Linux Kernel. If unsure, say Y.
28 config SPL_FRAMEWORK_BOARD_INIT_F
29 bool "Define a generic function board_init_f"
30 depends on SPL_FRAMEWORK
32 Define a generic function board_init_f that:
33 - initialize the spl (spl_early_init)
34 - initialize the serial (preloader_console_init)
35 Unless you want to provide your own board_init_f, you should say Y.
38 hex "Maximum size of SPL image"
40 default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
41 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
44 Specifies the maximum length of the U-Boot SPL image.
45 If this value is zero, it is ignored.
47 config SPL_SIZE_LIMIT_SUBTRACT_GD
48 bool "SPL image size check: provide space for global data"
49 depends on SPL_SIZE_LIMIT > 0
51 If enabled, aligned size of global data is reserved in
52 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
53 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
54 pre-reloc global data is put into this SRAM, too.
56 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
57 bool "SPL image size check: provide space for malloc() pool before relocation"
58 depends on SPL_SIZE_LIMIT > 0
60 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
61 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
62 describes the size of SRAM available for SPL when pre-reloc malloc
63 pool is put into this SRAM, too.
65 config SPL_SIZE_LIMIT_PROVIDE_STACK
66 hex "SPL image size check: provide stack space before relocation"
67 depends on SPL_SIZE_LIMIT > 0
70 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
71 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
72 of SRAM available for SPL when the stack required before reolcation
75 config SPL_SYS_STACK_F_CHECK_BYTE
79 Constant used to check the stack
81 config SPL_SYS_REPORT_STACK_F_USAGE
82 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
83 bool "Check and report stack usage in SPL before relocation"
85 If this option is enabled, the initial SPL stack is filled with 0xaa
86 very early, up to the size configured with
87 SPL_SIZE_LIMIT_PROVIDE_STACK.
88 Later when SPL is done using this initial stack and switches to a
89 stack in DRAM, the actually used size of this initial stack is
90 reported by examining the memory and searching for the lowest
91 occurrence of non 0xaa bytes.
92 This default implementation works for stacks growing down only.
94 menu "PowerPC and LayerScape SPL Boot options"
97 bool "Load SPL from NAND flash"
98 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
101 bool "Load SPL from SD Card / eMMC"
102 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
105 bool "Load SPL from SPI flash"
106 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
109 bool "Create SPL in Freescale PBI format"
110 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
113 Create boot binary having SPL binary in PBI format concatenated with
117 bool "Allocate memory for bd_info"
118 default y if X86 || SANDBOX
120 Some boards don't allocate space for this in their board_init_f()
121 code. In this case U-Boot can allocate space for gd->bd in the
122 standard SPL flow (board_init_r()). Enable this option to support
128 bool "Pass hand-off information from SPL to U-Boot proper"
129 depends on SPL && BLOBLIST
131 It is useful to be able to pass information from SPL to U-Boot
132 proper to preserve state that is known in SPL and is needed in U-Boot.
133 Enable this to locate the handoff information in U-Boot proper, early
134 in boot. It is available in gd->handoff. The state state is set up
135 in SPL (or TPL if that is being used).
140 bool "Pass hand-off information from SPL to U-Boot proper"
141 depends on HANDOFF && SPL_BLOBLIST
144 This option enables SPL to write handoff information. This can be
145 used to pass information like the size of SDRAM from SPL to U-Boot
146 proper. Also SPL can receive information from TPL in the same place
150 string "Linker script for the SPL stage"
151 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
153 The SPL stage will usually require a different linker-script
154 (as it runs from a different memory region) than the regular
155 U-Boot stage. Set this to the path of the linker-script to
160 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
161 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
162 default 0x20060 if SUN50I_GEN_H6
163 default 0x00060 if ARCH_SUNXI
164 default 0xfffc0000 if ARCH_ZYNQMP
167 The address in memory that SPL will be running from.
169 config SPL_BOARD_INIT
170 bool "Call board-specific initialization in SPL"
172 If this option is enabled, U-Boot will call the function
173 spl_board_init() from board_init_r(). This function should be
174 provided by the board.
176 config SPL_BOOTROM_SUPPORT
177 bool "Support returning to the BOOTROM"
179 Some platforms (e.g. the Rockchip RK3368) provide support in their
180 ROM for loading the next boot-stage after performing basic setup
183 Enable this option, to return to the BOOTROM through the
184 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
185 boot device list, if not implemented for a given board)
187 config SPL_BOOTCOUNT_LIMIT
188 bool "Support bootcount in SPL"
189 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
191 On some boards, which use 'falcon' mode, it is necessary to check
192 and increment the number of boot attempts. Such boards do not
193 use proper U-Boot for normal boot flow and hence needs those
194 adjustments to be done in the SPL.
196 config SPL_RAW_IMAGE_SUPPORT
197 bool "Support SPL loading and booting of RAW images"
198 default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
199 default y if !TI_SECURE_DEVICE
201 SPL will support loading and booting a RAW image when this option
202 is y. If this is not set, SPL will move on to other available
203 boot media to find a suitable image.
205 config SPL_LEGACY_IMAGE_SUPPORT
206 bool "Support SPL loading and booting of Legacy images"
207 default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
209 SPL will support loading and booting Legacy images when this option
210 is y. If this is not set, SPL will move on to other available
211 boot media to find a suitable image.
213 config SPL_LEGACY_IMAGE_CRC_CHECK
214 bool "Check CRC of Legacy images"
215 depends on SPL_LEGACY_IMAGE_SUPPORT
216 select SPL_CRC32_SUPPORT
218 Enable this to check the CRC of Legacy images. While this increases
219 reliability, it affects both code size and boot duration.
220 If disabled, Legacy images are booted if the image magic and size
221 are correct, without further integrity checks.
223 config SPL_SYS_MALLOC_SIMPLE
225 prompt "Only use malloc_simple functions in the SPL"
227 Say Y here to only use the *_simple malloc functions from
228 malloc_simple.c, rather then using the versions from dlmalloc.c;
229 this will make the SPL binary smaller at the cost of more heap
230 usage as the *_simple malloc functions do not re-use free-ed mem.
232 config TPL_SYS_MALLOC_SIMPLE
234 prompt "Only use malloc_simple functions in the TPL"
237 Say Y here to only use the *_simple malloc functions from
238 malloc_simple.c, rather then using the versions from dlmalloc.c;
239 this will make the TPL binary smaller at the cost of more heap
240 usage as the *_simple malloc functions do not re-use free-ed mem.
243 bool "Enable SDRAM location for SPL stack"
245 SPL starts off execution in SRAM and thus typically has only a small
246 stack available. Since SPL sets up DRAM while in its board_init_f()
247 function, it is possible for the stack to move there before
248 board_init_r() is reached. This option enables a special SDRAM
249 location for the SPL stack. U-Boot SPL switches to this after
250 board_init_f() completes, and before board_init_r() starts.
252 config SPL_STACK_R_ADDR
253 depends on SPL_STACK_R
254 hex "SDRAM location for SPL stack"
255 default 0x82000000 if ARCH_OMAP2PLUS
257 Specify the address in SDRAM for the SPL stack. This will be set up
258 before board_init_r() is called.
260 config SPL_STACK_R_MALLOC_SIMPLE_LEN
261 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
262 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
265 Specify the amount of the stack to use as memory pool for
266 malloc_simple after switching the stack to DRAM. This may be set
267 to give board_init_r() a larger heap then the initial heap in
268 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
270 config SPL_SEPARATE_BSS
271 bool "BSS section is in a different memory region from text"
273 Some platforms need a large BSS region in SPL and can provide this
274 because RAM is already set up. In this case BSS can be moved to RAM.
275 This option should then be enabled so that the correct device tree
276 location is used. Normally we put the device tree at the end of BSS
277 but with this option enabled, it goes at _image_binary_end.
281 depends on SPL_OF_PLATDATA
282 # Bind cannot be supported because the udevice structs are in read-only
283 # memory so we cannot update the linked lists.
284 select SPL_OF_PLATDATA_NO_BIND
285 select SPL_OF_PLATDATA_RT
287 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
288 section of memory. This means that of-platdata must make a copy (in
289 writeable memory) of anything it wants to modify, such as
292 config SPL_BANNER_PRINT
293 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
296 If this option is enabled, SPL will print the banner with version
297 info. Disabling this option could be useful to reduce SPL boot time
298 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
300 config TPL_BANNER_PRINT
301 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
305 If this option is enabled, TPL will print the banner with version
306 info. Disabling this option could be useful to reduce TPL boot time
307 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
310 depends on ARM && !ARM64
311 bool "Allows initializing BSS early before entering board_init_f"
313 On some platform we have sufficient memory available early on to
314 allow setting up and using a basic BSS prior to entering
315 board_init_f. Activating this option will also de-activate the
316 clearing of BSS during the SPL relocation process, thus allowing
317 to carry state from board_init_f to board_init_r by way of BSS.
319 config SPL_DISPLAY_PRINT
320 bool "Display a board-specific message in SPL"
322 If this option is enabled, U-Boot will call the function
323 spl_display_print() immediately after displaying the SPL console
324 banner ("U-Boot SPL ..."). This function should be provided by
327 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
328 bool "MMC raw mode: by sector"
329 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
330 ARCH_MX6 || ARCH_MX7 || \
331 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
332 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
333 OMAP44XX || OMAP54XX || AM33XX || AM43XX || TARGET_SIFIVE_FU540
335 Use sector number for specifying U-Boot location on MMC/SD in
338 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
339 hex "Address on the MMC to load U-Boot from"
340 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
341 default 0x40 if ARCH_SUNXI
342 default 0x75 if ARCH_DAVINCI
343 default 0x8a if ARCH_MX6 || ARCH_MX7
344 default 0x100 if ARCH_UNIPHIER
345 default 0x140 if ARCH_MVEBU
346 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
347 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
348 OMAP54XX || AM33XX || AM43XX || ARCH_K3
349 default 0x4000 if ARCH_ROCKCHIP
350 default 0x822 if TARGET_SIFIVE_FU540
352 Address on the MMC to load U-Boot from, when the MMC is being used
353 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
355 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
356 hex "U-Boot main hardware partition image offset"
357 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
358 default 0x10 if ARCH_SUNXI
361 On some platforms SPL location depends on hardware partition. The ROM
362 code skips the MBR sector when loading SPL from main hardware data
363 partition. This adds offset to the main U-Boot image. Set this symbol
364 to the number of skipped sectors.
366 If unsure, leave the default.
368 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
369 bool "MMC Raw mode: by partition"
371 Use a partition for loading U-Boot when using MMC/SD in raw mode.
373 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
374 hex "Partition to use to load U-Boot from"
375 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
378 Partition on the MMC to load U-Boot from when the MMC is being
381 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
382 bool "MMC raw mode: by partition type"
383 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
385 Use partition type for specifying U-Boot partition on MMC/SD in
386 raw mode. U-Boot will be loaded from the first partition of this
389 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
390 hex "Partition Type on the MMC to load U-Boot from"
391 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
393 Partition Type on the MMC to load U-Boot from, when the MMC is being
396 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
397 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
398 depends on SUPPORT_EMMC_BOOT
400 eMMC boot partition is normally configured by the bits of the EXT_CSD
401 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
402 cases it might be required in SPL to load the image from different
403 partition than the partition selected by EXT_CSC_PART_CONFIG register.
404 Enable this option if you intend to use an eMMC boot partition other
405 then selected via EXT_CSC_PART_CONFIG register and specify the custom
406 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
409 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
410 int "Number of the eMMC boot partition to use"
411 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
414 eMMC boot partition number to use when the eMMC in raw mode and
415 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
416 by user defined partition number.
418 config SPL_CRC32_SUPPORT
420 default y if SPL_LEGACY_IMAGE_SUPPORT
422 Enable this to support CRC32 in uImages or FIT images within SPL.
423 This is a 32-bit checksum value that can be used to verify images.
424 For FIT images, this is the least secure type of checksum, suitable
425 for detected accidental image corruption. For secure applications you
426 should consider SHA1 or SHA256.
428 config SPL_MD5_SUPPORT
432 Enable this to support MD5 in FIT images within SPL. An MD5
433 checksum is a 128-bit hash value used to check that the image
434 contents have not been corrupted. Note that MD5 is not considered
435 secure as it is possible (with a brute-force attack) to adjust the
436 image while still retaining the same MD5 hash value. For secure
437 applications where images may be changed maliciously, you should
438 consider SHA256 or SHA384.
440 config SPL_SHA1_SUPPORT
445 Enable this to support SHA1 in FIT images within SPL. A SHA1
446 checksum is a 160-bit (20-byte) hash value used to check that the
447 image contents have not been corrupted or maliciously altered.
448 While SHA1 is fairly secure it is coming to the end of its life
449 due to the expanding computing power available to brute-force
450 attacks. For more security, consider SHA256 or SHA384.
452 config SPL_SHA256_SUPPORT
453 bool "Support SHA256"
457 Enable this to support SHA256 in FIT images within SPL. A SHA256
458 checksum is a 256-bit (32-byte) hash value used to check that the
459 image contents have not been corrupted.
461 config SPL_SHA384_SUPPORT
462 bool "Support SHA384"
467 Enable this to support SHA384 in FIT images within SPL. A SHA384
468 checksum is a 384-bit (48-byte) hash value used to check that the
469 image contents have not been corrupted. Use this for the highest
472 config SPL_SHA512_SUPPORT
473 bool "Support SHA512"
478 Enable this to support SHA512 in FIT images within SPL. A SHA512
479 checksum is a 512-bit (64-byte) hash value used to check that the
480 image contents have not been corrupted.
482 config SPL_FIT_IMAGE_TINY
483 bool "Remove functionality from SPL FIT loading to reduce size"
485 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
486 default y if ARCH_IMX8M
488 Enable this to reduce the size of the FIT image loading code
489 in SPL, if space for the SPL binary is very tight.
491 This skips the recording of each loaded payload
492 (i.e. loadable) into the FDT (modifying the loaded FDT to
493 ensure this information is available to the next image
496 config SPL_CACHE_SUPPORT
497 bool "Support CACHE drivers"
499 Enable CACHE drivers in SPL. These drivers can keep data so that
500 future requests for that data can be served faster. Enable this option
501 to build the drivers in drivers/cache as part of an SPL build.
503 config SPL_CPU_SUPPORT
504 bool "Support CPU drivers"
506 Enable this to support CPU drivers in SPL. These drivers can set
507 up CPUs and provide information about them such as the model and
508 name. This can be useful in SPL since setting up the CPUs earlier
509 may improve boot performance. Enable this option to build the
510 drivers in drivers/cpu as part of an SPL build.
512 config SPL_CRYPTO_SUPPORT
513 bool "Support crypto drivers"
515 Enable crypto drivers in SPL. These drivers can be used to
516 accelerate secure boot processing in secure applications. Enable
517 this option to build the drivers in drivers/crypto as part of an
520 config SPL_HASH_SUPPORT
521 bool "Support hashing drivers"
525 Enable hashing drivers in SPL. These drivers can be used to
526 accelerate secure boot processing in secure applications. Enable
527 this option to build system-specific drivers for hash acceleration
528 as part of an SPL build.
530 config TPL_HASH_SUPPORT
531 bool "Support hashing drivers in TPL"
536 Enable hashing drivers in SPL. These drivers can be used to
537 accelerate secure boot processing in secure applications. Enable
538 this option to build system-specific drivers for hash acceleration
539 as part of an SPL build.
542 bool "Support DMA drivers"
544 Enable DMA (direct-memory-access) drivers in SPL. These drivers
545 can be used to handle memory-to-peripheral data transfer without
546 the CPU moving the data. Enable this option to build the drivers
547 in drivers/dma as part of an SPL build.
549 config SPL_DRIVERS_MISC_SUPPORT
550 bool "Support misc drivers"
552 Enable miscellaneous drivers in SPL. These drivers perform various
553 tasks that don't fall nicely into other categories, Enable this
554 option to build the drivers in drivers/misc as part of an SPL
555 build, for those that support building in SPL (not all drivers do).
557 config SPL_ENV_SUPPORT
558 bool "Support an environment"
560 Enable environment support in SPL. The U-Boot environment provides
561 a number of settings (essentially name/value pairs) which can
562 control many aspects of U-Boot's operation. Normally this is not
563 needed in SPL as it has a much simpler task with less
564 configuration. But some boards use this to support 'Falcon' boot
565 on EXT2 and FAT, where SPL boots directly into Linux without
566 starting U-Boot first. Enabling this option will make env_get()
567 and env_set() available in SPL.
570 bool "Support save environment"
571 depends on SPL_ENV_SUPPORT
572 select SPL_MMC_WRITE if ENV_IS_IN_MMC
574 Enable save environment support in SPL after setenv. By default
575 the saveenv option is not provided in SPL, but some boards need
576 this support in 'Falcon' boot, where SPL need to boot from
577 different images based on environment variable set by OS. For
578 example OS may set "reboot_image" environment variable to
579 "recovery" inorder to boot recovery image by SPL. The SPL read
580 "reboot_image" and act accordingly and change the reboot_image
581 to default mode using setenv and save the environment.
583 config SPL_ETH_SUPPORT
584 bool "Support Ethernet"
585 depends on SPL_ENV_SUPPORT
587 Enable access to the network subsystem and associated Ethernet
588 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
589 link rather than from an on-board peripheral. Environment support
590 is required since the network stack uses a number of environment
591 variables. See also SPL_NET_SUPPORT.
594 bool "Support EXT filesystems"
596 Enable support for EXT2/3/4 filesystems with SPL. This permits
597 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
598 filesystem from within SPL. Support for the underlying block
599 device (e.g. MMC or USB) must be enabled separately.
601 config SPL_FS_SQUASHFS
602 bool "Support SquashFS filesystems"
605 Enable support for SquashFS filesystems with SPL. This permits
606 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
607 filesystem from within SPL. Support for the underlying block
608 device (e.g. MMC or USB) must be enabled separately.
611 bool "Support FAT filesystems"
614 Enable support for FAT and VFAT filesystems with SPL. This
615 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
616 filesystem from within SPL. Support for the underlying block
617 device (e.g. MMC or USB) must be enabled separately.
620 bool "Support write for FAT filesystems"
622 Enable write support for FAT and VFAT filesystems with SPL.
623 Support for the underlying block device (e.g. MMC or USB) must be
629 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
630 provide software-configurable hardware which is typically used to
631 implement peripherals (such as UARTs, LCD displays, MMC) or
632 accelerate custom processing functions, such as image processing
633 or machine learning. Sometimes it is useful to program the FPGA
634 as early as possible during boot, and this option can enable that
637 config SPL_GPIO_SUPPORT
638 bool "Support GPIO in SPL"
640 Enable support for GPIOs (General-purpose Input/Output) in SPL.
641 GPIOs allow U-Boot to read the state of an input line (high or
642 low) and set the state of an output line. This can be used to
643 drive LEDs, control power to various system parts and read user
644 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
645 for example. Enable this option to build the drivers in
646 drivers/gpio as part of an SPL build.
648 config SPL_I2C_SUPPORT
651 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
652 I2C works with a clock and data line which can be driven by a
653 one or more masters or slaves. It is a fairly complex bus but is
654 widely used as it only needs two lines for communication. Speeds of
655 400kbps are typical but up to 3.4Mbps is supported by some
656 hardware. I2C can be useful in SPL to configure power management
657 ICs (PMICs) before raising the CPU clock speed, for example.
658 Enable this option to build the drivers in drivers/i2c as part of
661 config SPL_LIBCOMMON_SUPPORT
662 bool "Support common libraries"
664 Enable support for common U-Boot libraries within SPL. These
665 libraries include common code to deal with U-Boot images,
666 environment and USB, for example. This option is enabled on many
667 boards. Enable this option to build the code in common/ as part of
670 config SPL_LIBDISK_SUPPORT
671 bool "Support disk partitions"
674 Enable support for disk partitions within SPL. 'Disk' is something
675 of a misnomer as it includes non-spinning media such as flash (as
676 used in MMC and USB sticks). Partitions provide a way for a disk
677 to be split up into separate regions, with a partition table placed
678 at the start or end which describes the location and size of each
679 'partition'. These partitions are typically uses as individual block
680 devices, typically with an EXT2 or FAT filesystem in each. This
681 option enables whatever partition support has been enabled in
682 U-Boot to also be used in SPL. It brings in the code in disk/.
684 config SPL_LIBGENERIC_SUPPORT
685 bool "Support generic libraries"
687 Enable support for generic U-Boot libraries within SPL. These
688 libraries include generic code to deal with device tree, hashing,
689 printf(), compression and the like. This option is enabled on many
690 boards. Enable this option to build the code in lib/ as part of an
693 config SPL_DM_MAILBOX
694 bool "Support Mailbox"
696 Enable support for Mailbox within SPL. This enable the inter
697 processor communication protocols tobe used within SPL. Enable
698 this option to build the drivers in drivers/mailbox as part of
701 config SPL_MMC_SUPPORT
704 select HAVE_BLOCK_DEVICE
706 Enable support for MMC (Multimedia Card) within SPL. This enables
707 the MMC protocol implementation and allows any enabled drivers to
708 be used within SPL. MMC can be used with or without disk partition
709 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
710 this option to build the drivers in drivers/mmc as part of an SPL
713 config SYS_MMCSD_FS_BOOT_PARTITION
714 int "MMC Boot Partition"
717 Partition on the MMC to load U-Boot from when the MMC is being
721 bool "Tiny MMC framework in SPL"
722 depends on SPL_MMC_SUPPORT
725 Enable MMC framework tinification support. This option is useful if
726 if your SPL is extremely size constrained. Heed the warning, enable
727 this option if and only if you know exactly what you are doing, if
728 you are reading this help text, you most likely have no idea :-)
730 The MMC framework is reduced to bare minimum to be useful. No malloc
731 support is needed for the MMC framework operation with this option
732 enabled. The framework supports exactly one MMC device and exactly
733 one MMC driver. The MMC driver can be adjusted to avoid any malloc
734 operations too, which can remove the need for malloc support in SPL
735 and thus further reduce footprint.
738 bool "MMC/SD/SDIO card support for write operations in SPL"
739 depends on SPL_MMC_SUPPORT
742 Enable write access to MMC and SD Cards in SPL
745 config SPL_MPC8XXX_INIT_DDR_SUPPORT
746 bool "Support MPC8XXX DDR init"
748 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
749 random-access memory) on the MPC8XXX family within SPL. This
750 allows DRAM to be set up before loading U-Boot into that DRAM,
753 config SPL_MTD_SUPPORT
754 bool "Support MTD drivers"
756 Enable support for MTD (Memory Technology Device) within SPL. MTD
757 provides a block interface over raw NAND and can also be used with
758 SPI flash. This allows SPL to load U-Boot from supported MTD
759 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
760 to enable specific MTD drivers.
762 config SPL_MUSB_NEW_SUPPORT
763 bool "Support new Mentor Graphics USB"
765 Enable support for Mentor Graphics USB in SPL. This is a new
766 driver used by some boards. Enable this option to build
767 the drivers in drivers/usb/musb-new as part of an SPL build. The
768 old drivers are in drivers/usb/musb.
770 config SPL_NAND_SUPPORT
771 bool "Support NAND flash"
773 Enable support for NAND (Negative AND) flash in SPL. NAND flash
774 can be used to allow SPL to load U-Boot from supported devices.
775 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
778 config SPL_NAND_DRIVERS
779 bool "Use standard NAND driver"
781 SPL uses normal NAND drivers, not minimal drivers.
784 bool "Include standard software ECC in the SPL"
786 config SPL_NAND_SIMPLE
787 bool "Support simple NAND drivers in SPL"
789 Support for NAND boot using simple NAND drivers that
790 expose the cmd_ctrl() interface.
793 depends on SPL_NAND_DRIVERS
794 bool "Use Base NAND Driver"
796 Include nand_base.c in the SPL.
798 config SPL_NAND_IDENT
799 depends on SPL_NAND_BASE
800 bool "Use chip ID to identify NAND flash"
802 SPL uses the chip ID list to identify the NAND flash.
807 Enable support for loading payloads from UBI. See
808 README.ubispl for more info.
813 bool "Support cache drivers in SPL"
815 Enable support for cache drivers in SPL.
818 bool "Support SPI DM drivers in SPL"
820 Enable support for SPI DM drivers in SPL.
822 config SPL_DM_SPI_FLASH
823 bool "Support SPI DM FLASH drivers in SPL"
825 Enable support for SPI DM flash drivers in SPL.
829 config SPL_UBI_LOAD_BY_VOLNAME
830 bool "Support loading volumes by name"
832 This enables support for loading UBI volumes by name. When this
833 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
834 configure the volume name from which to load U-Boot.
836 config SPL_UBI_MAX_VOL_LEBS
837 int "Maximum number of LEBs per volume"
840 The maximum number of logical eraseblocks which a static volume
841 to load can contain. Used for sizing the scan data structure.
843 config SPL_UBI_MAX_PEB_SIZE
844 int "Maximum PEB size"
847 The maximum physical erase block size.
849 config SPL_UBI_MAX_PEBS
850 int "Maximum number of PEBs"
853 The maximum physical erase block size. If not overridden by
854 board code, this value will be used as the actual number of PEBs.
856 config SPL_UBI_PEB_OFFSET
857 int "Offset to first UBI PEB"
860 The offset in number of PEBs from the start of flash to the first
861 PEB part of the UBI image.
863 config SPL_UBI_VID_OFFSET
864 int "Offset to VID header"
867 config SPL_UBI_LEB_START
868 int "Offset to LEB in PEB"
871 The offset in bytes to the LEB within a PEB.
873 config SPL_UBI_INFO_ADDR
874 hex "Address to place UBI scan info"
877 Address for ubispl to place the scan info. Read README.ubispl to
878 determine the required size
880 config SPL_UBI_VOL_IDS
881 int "Maximum volume id"
884 The maximum volume id which can be loaded. Used for sizing the
887 config SPL_UBI_LOAD_MONITOR_ID
888 int "id of U-Boot volume"
891 The UBI volume id from which to load U-Boot
893 config SPL_UBI_LOAD_MONITOR_VOLNAME
894 string "volume name of U-Boot volume"
895 depends on SPL_UBI_LOAD_BY_VOLNAME
897 The UBI volume name from which to load U-Boot
899 config SPL_UBI_LOAD_KERNEL_ID
900 int "id of kernel volume"
901 depends on SPL_OS_BOOT && SPL_UBI
903 The UBI volume id from which to load the kernel
905 config SPL_UBI_LOAD_ARGS_ID
906 int "id of kernel args volume"
907 depends on SPL_OS_BOOT && SPL_UBI
909 The UBI volume id from which to load the device tree
911 config UBI_SPL_SILENCE_MSG
912 bool "silence UBI SPL messages"
915 Disable messages from UBI SPL. This leaves warnings
920 config SPL_NET_SUPPORT
921 bool "Support networking"
923 Enable support for network devices (such as Ethernet) in SPL.
924 This permits SPL to load U-Boot over a network link rather than
925 from an on-board peripheral. Environment support is required since
926 the network stack uses a number of environment variables. See also
930 config SPL_NET_VCI_STRING
931 string "BOOTP Vendor Class Identifier string sent by SPL"
933 As defined by RFC 2132 the vendor class identifier field can be
934 sent by the client to identify the vendor type and configuration
935 of a client. This is often used in practice to allow for the DHCP
936 server to specify different files to load depending on if the ROM,
937 SPL or U-Boot itself makes the request
938 endif # if SPL_NET_SUPPORT
940 config SPL_NO_CPU_SUPPORT
941 bool "Drop CPU code in SPL"
943 This is specific to the ARM926EJ-S CPU. It disables the standard
944 start.S start-up code, presumably so that a replacement can be
945 used on that CPU. You should not enable it unless you know what
948 config SPL_NOR_SUPPORT
949 bool "Support NOR flash"
951 Enable support for loading U-Boot from memory-mapped NOR (Negative
952 OR) flash in SPL. NOR flash is slow to write but fast to read, and
953 a memory-mapped device makes it very easy to access. Loading from
954 NOR is typically achieved with just a memcpy().
956 config SPL_XIP_SUPPORT
960 Enable support for execute in place of U-Boot or kernel image. There
961 is no need to copy image from flash to ram if flash supports execute
962 in place. Its very useful in systems having enough flash but not
963 enough ram to load the image.
965 config SPL_ONENAND_SUPPORT
966 bool "Support OneNAND flash"
968 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
969 a type of NAND flash and therefore can be used to allow SPL to
970 load U-Boot from supported devices. This enables the drivers in
971 drivers/mtd/onenand as part of an SPL build.
974 bool "Activate Falcon Mode"
975 depends on !TI_SECURE_DEVICE
978 Enable booting directly to an OS from SPL.
979 for more info read doc/README.falcon
983 hex "addr, where OS is found"
984 depends on SPL_NOR_SUPPORT
986 Specify the address, where the OS image is found, which
993 default "tpl/u-boot-with-tpl.bin" if TPL
996 Payload for SPL boot. For backward compatibility, default to
997 u-boot.bin, i.e. RAW image without any header. In case of
998 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1002 bool "Support PCI drivers"
1004 Enable support for PCI in SPL. For platforms that need PCI to boot,
1005 or must perform some init using PCI in SPL, this provides the
1006 necessary driver support. This enables the drivers in drivers/pci
1007 as part of an SPL build.
1009 config SPL_PCH_SUPPORT
1010 bool "Support PCH drivers"
1012 Enable support for PCH (Platform Controller Hub) devices in SPL.
1013 These are used to set up GPIOs and the SPI peripheral early in
1014 boot. This enables the drivers in drivers/pch as part of an SPL
1017 config SPL_POST_MEM_SUPPORT
1018 bool "Support POST drivers"
1020 Enable support for POST (Power-on Self Test) in SPL. POST is a
1021 procedure that checks that the hardware (CPU or board) appears to
1022 be functionally correctly. It is a sanity check that can be
1023 performed before booting. This enables the drivers in post/drivers
1024 as part of an SPL build.
1027 bool "Support reset drivers"
1030 Enable support for reset control in SPL.
1031 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1032 by using the generic reset API provided by driver model.
1033 This enables the drivers in drivers/reset as part of an SPL build.
1035 config SPL_POWER_SUPPORT
1036 bool "Support power drivers"
1038 Enable support for power control in SPL. This includes support
1039 for PMICs (Power-management Integrated Circuits) and some of the
1040 features provided by PMICs. In particular, voltage regulators can
1041 be used to enable/disable power and vary its voltage. That can be
1042 useful in SPL to turn on boot peripherals and adjust CPU voltage
1043 so that the clock speed can be increased. This enables the drivers
1044 in drivers/power, drivers/power/pmic and drivers/power/regulator
1045 as part of an SPL build.
1047 config SPL_POWER_DOMAIN
1048 bool "Support power domain drivers"
1050 Enable support for power domain control in SPL. Many SoCs allow
1051 power to be applied to or removed from portions of the SoC (power
1052 domains). This may be used to save power. This API provides the
1053 means to control such power management hardware. This enables
1054 the drivers in drivers/power/domain as part of a SPL build.
1056 config SPL_RAM_SUPPORT
1057 bool "Support booting from RAM"
1058 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1060 Enable booting of an image in RAM. The image can be preloaded or
1061 it can be loaded by SPL directly into RAM (e.g. using USB).
1063 config SPL_RAM_DEVICE
1064 bool "Support booting from preloaded image in RAM"
1065 depends on SPL_RAM_SUPPORT
1066 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1068 Enable booting of an image already loaded in RAM. The image has to
1069 be already in memory when SPL takes over, e.g. loaded by the boot
1072 config SPL_REMOTEPROC
1073 bool "Support REMOTEPROCS"
1075 Enable support for REMOTEPROCs in SPL. This permits to load
1076 a remote processor firmware in SPL.
1078 config SPL_RTC_SUPPORT
1079 bool "Support RTC drivers"
1081 Enable RTC (Real-time Clock) support in SPL. This includes support
1082 for reading and setting the time. Some RTC devices also have some
1083 non-volatile (battery-backed) memory which is accessible if
1084 needed. This enables the drivers in drivers/rtc as part of an SPL
1087 config SPL_SATA_SUPPORT
1088 bool "Support loading from SATA"
1090 Enable support for SATA (Serial AT attachment) in SPL. This allows
1091 use of SATA devices such as hard drives and flash drivers for
1092 loading U-Boot. SATA is used in higher-end embedded systems and
1093 can provide higher performance than MMC , at somewhat higher
1094 expense and power consumption. This enables loading from SATA
1095 using a configured device.
1097 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1098 bool "SATA raw mode: by sector"
1099 depends on SPL_SATA_SUPPORT
1101 Use sector number for specifying U-Boot location on SATA disk in
1104 config SPL_SATA_RAW_U_BOOT_SECTOR
1105 hex "Sector on the SATA disk to load U-Boot from"
1106 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1108 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1109 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1111 config SPL_SERIAL_SUPPORT
1112 bool "Support serial"
1116 Enable support for serial in SPL. This allows use of a serial UART
1117 for displaying messages while SPL is running. It also brings in
1118 printf() and panic() functions. This should normally be enabled
1119 unless there are space reasons not to. Even then, consider
1120 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1122 config SPL_SPI_SUPPORT
1123 bool "Support SPI drivers"
1125 Enable support for using SPI in SPL. This is used for connecting
1126 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1127 more details on that. The SPI driver provides the transport for
1128 data between the SPI flash and the CPU. This option can be used to
1129 enable SPI drivers that are needed for other purposes also, such
1132 config SPL_SPI_FLASH_SUPPORT
1133 bool "Support SPI flash drivers"
1134 depends on SPL_SPI_SUPPORT
1136 Enable support for using SPI flash in SPL, and loading U-Boot from
1137 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1138 the SPI bus that is used to connect it to a system. It is a simple
1139 but fast bidirectional 4-wire bus (clock, chip select and two data
1140 lines). This enables the drivers in drivers/mtd/spi as part of an
1141 SPL build. This normally requires SPL_SPI_SUPPORT.
1143 if SPL_SPI_FLASH_SUPPORT
1145 config SPL_SPI_FLASH_TINY
1146 bool "Enable low footprint SPL SPI Flash support"
1147 depends on !SPI_FLASH_BAR
1148 default y if SPI_FLASH
1150 Enable lightweight SPL SPI Flash support that supports just reading
1151 data/images from flash. No support to write/erase flash. Enable
1152 this if you have SPL size limitations and don't need full
1153 fledged SPI flash support.
1155 config SPL_SPI_FLASH_SFDP_SUPPORT
1156 bool "SFDP table parsing support for SPI NOR flashes"
1157 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1159 Enable support for parsing and auto discovery of parameters for
1160 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1161 tables as per JESD216 standard in SPL.
1163 config SPL_SPI_FLASH_MTD
1164 bool "Support for SPI flash MTD drivers in SPL"
1166 Enable support for SPI flash MTD drivers in SPL.
1169 bool "Support loading from SPI flash"
1171 Enable support for loading next stage, U-Boot or otherwise, from
1172 SPI NOR in U-Boot SPL.
1174 endif # SPL_SPI_FLASH_SUPPORT
1176 config SYS_SPI_U_BOOT_OFFS
1177 hex "address of u-boot payload in SPI flash"
1178 default 0x8000 if ARCH_SUNXI
1180 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1182 Address within SPI-Flash from where the u-boot payload is fetched
1186 bool "Driver support for thermal devices"
1188 Enable support for temperature-sensing devices. Some SoCs have on-chip
1189 temperature sensors to permit warnings, speed throttling or even
1190 automatic power-off when the temperature gets too high or low. Other
1191 devices may be discrete but connected on a suitable bus.
1193 config SPL_USB_HOST_SUPPORT
1194 bool "Support USB host drivers"
1195 select HAVE_BLOCK_DEVICE
1197 Enable access to USB (Universal Serial Bus) host devices so that
1198 SPL can load U-Boot from a connected USB peripheral, such as a USB
1199 flash stick. While USB takes a little longer to start up than most
1200 buses, it is very flexible since many different types of storage
1201 device can be attached. This option enables the drivers in
1202 drivers/usb/host as part of an SPL build.
1204 config SPL_USB_STORAGE
1205 bool "Support loading from USB"
1206 depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
1208 Enable support for USB devices in SPL. This allows use of USB
1209 devices such as hard drives and flash drivers for loading U-Boot.
1210 The actual drivers are enabled separately using the normal U-Boot
1211 config options. This enables loading from USB using a configured
1214 config SPL_USB_GADGET
1215 bool "Suppport USB Gadget drivers"
1217 Enable USB Gadget API which allows to enable USB device functions
1222 config SPL_USB_ETHER
1223 bool "Support USB Ethernet drivers"
1225 Enable access to the USB network subsystem and associated
1226 drivers in SPL. This permits SPL to load U-Boot over a
1227 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1228 than from an onboard peripheral. Environment support is required
1229 since the network stack uses a number of environment variables.
1230 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
1233 bool "Support DFU (Device Firmware Upgrade)"
1234 select SPL_HASH_SUPPORT
1235 select SPL_DFU_NO_RESET
1236 depends on SPL_RAM_SUPPORT
1238 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1239 RAM memory device support. The ROM code will load and execute
1240 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1241 selected device partition from host-pc using dfu-utils.
1242 This feature is useful to flash the binaries to factory or bare-metal
1243 boards using USB interface.
1246 bool "DFU device selection"
1251 depends on SPL_DFU && SPL_RAM_SUPPORT
1253 select RAM/DDR memory device for loading binary images
1254 (u-boot/kernel) to the selected device partition using
1255 DFU and execute the u-boot/kernel from RAM.
1259 config SPL_USB_SDP_SUPPORT
1260 bool "Support SDP (Serial Download Protocol)"
1261 depends on SPL_SERIAL_SUPPORT
1263 Enable Serial Download Protocol (SDP) device support in SPL. This
1264 allows to download images into memory and execute (jump to) them
1265 using the same protocol as implemented by the i.MX family's boot ROM.
1267 config SPL_SDP_USB_DEV
1268 int "SDP USB controller index"
1270 depends on SPL_USB_SDP_SUPPORT
1272 Some boards have USB controller other than 0. Define this option
1273 so it can be used in compiled environment.
1276 config SPL_WATCHDOG_SUPPORT
1277 bool "Support watchdog drivers"
1278 imply SPL_WDT if !HW_WATCHDOG
1280 Enable support for watchdog drivers in SPL. A watchdog is
1281 typically a hardware peripheral which can reset the system when it
1282 detects no activity for a while (such as a software crash). This
1283 enables the drivers in drivers/watchdog as part of an SPL build.
1285 config SPL_YMODEM_SUPPORT
1286 bool "Support loading using Ymodem"
1287 depends on SPL_SERIAL_SUPPORT
1289 While loading from serial is slow it can be a useful backup when
1290 there is no other option. The Ymodem protocol provides a reliable
1291 means of transmitting U-Boot over a serial line for using in SPL,
1292 with a checksum to ensure correctness.
1295 bool "Support ARM Trusted Firmware"
1296 depends on ARM64 && SPL_FIT
1298 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1299 is loaded by SPL (which is considered as BL2 in ATF terminology).
1300 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1302 config SPL_ATF_LOAD_IMAGE_V2
1303 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1306 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1308 If you want to load a bl31 image from the SPL and need the new
1311 config SPL_ATF_NO_PLATFORM_PARAM
1312 bool "Pass no platform parameter"
1315 While we expect to call a pointer to a valid FDT (or NULL)
1316 as the platform parameter to an ATF, some ATF versions are
1317 not U-Boot aware and have an insufficiently robust parameter
1318 validation to gracefully reject a FDT being passed.
1320 If this option is enabled, the spl_atf os-type handler will
1321 always pass NULL for the platform parameter.
1323 If your ATF is affected, say Y.
1325 config SPL_AM33XX_ENABLE_RTC32K_OSC
1326 bool "Enable the RTC32K OSC on AM33xx based platforms"
1329 Enable access to the AM33xx RTC and select the external 32kHz clock
1333 bool "Support OP-TEE Trusted OS"
1336 OP-TEE is an open source Trusted OS which is loaded by SPL.
1337 More detail at: https://github.com/OP-TEE/optee_os
1340 bool "Support RISC-V OpenSBI"
1341 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1343 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1344 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1345 firmware. It is loaded and started by U-Boot SPL.
1347 More details are available at https://github.com/riscv/opensbi and
1348 https://github.com/riscv/riscv-sbi-doc
1350 config SPL_OPENSBI_LOAD_ADDR
1351 hex "OpenSBI load address"
1352 depends on SPL_OPENSBI
1354 Load address of the OpenSBI binary.
1358 depends on SUPPORT_TPL
1361 If you want to build TPL as well as the normal image and SPL, say Y.
1365 config TPL_SIZE_LIMIT
1366 hex "Maximum size of TPL image"
1370 Specifies the maximum length of the U-Boot TPL image.
1371 If this value is zero, it is ignored.
1373 config TPL_FRAMEWORK
1374 bool "Support TPL based upon the common SPL framework"
1375 default y if SPL_FRAMEWORK
1377 Enable the SPL framework under common/spl/ for TPL builds.
1378 This framework supports MMC, NAND and YMODEM and other methods
1379 loading of U-Boot's SPL stage. If unsure, say Y.
1382 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1383 depends on HANDOFF && TPL_BLOBLIST
1386 This option enables TPL to write handoff information. This can be
1387 used to pass information like the size of SDRAM from TPL to U-Boot
1388 proper. The information is also available to SPL if it is useful
1391 config TPL_BOARD_INIT
1392 bool "Call board-specific initialization in TPL"
1394 If this option is enabled, U-Boot will call the function
1395 spl_board_init() from board_init_r(). This function should be
1396 provided by the board.
1398 config TPL_BOOTCOUNT_LIMIT
1399 bool "Support bootcount in TPL"
1400 depends on TPL_ENV_SUPPORT
1402 If this option is enabled, the TPL will support bootcount.
1403 For example, it may be useful to choose the device to boot.
1406 string "Linker script for the TPL stage"
1408 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1409 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1411 The TPL stage will usually require a different linker-script
1412 (as it runs from a different memory region) than the regular
1413 U-Boot stage. Set this to the path of the linker-script to
1416 May be left empty to trigger the Makefile infrastructure to
1417 fall back to the linker-script used for the SPL stage.
1419 config TPL_NEEDS_SEPARATE_TEXT_BASE
1420 bool "TPL needs a separate text-base"
1424 Enable, if the TPL stage should not inherit its text-base
1425 from the SPL stage. When enabled, a base address for the
1426 .text sections of the TPL stage has to be set below.
1428 config TPL_NEEDS_SEPARATE_STACK
1429 bool "TPL needs a separate initial stack-pointer"
1433 Enable, if the TPL stage should not inherit its initial
1434 stack-pointer from the settings for the SPL stage.
1436 config TPL_TEXT_BASE
1437 hex "Base address for the .text section of the TPL stage"
1438 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1440 The base address for the .text section of the TPL stage.
1443 int "Maximum size (in bytes) for the TPL stage"
1447 The maximum size (in bytes) of the TPL stage.
1450 hex "Address of the initial stack-pointer for the TPL stage"
1451 depends on TPL_NEEDS_SEPARATE_STACK
1453 The address of the initial stack-pointer for the TPL stage.
1454 Usually this will be the (aligned) top-of-stack.
1456 config TPL_READ_ONLY
1458 depends on TPL_OF_PLATDATA
1459 select TPL_OF_PLATDATA_NO_BIND
1460 select TPL_OF_PLATDATA_RT
1462 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1463 section of memory. This means that of-platdata must make a copy (in
1464 writeable memory) of anything it wants to modify, such as
1465 device-private data.
1467 config TPL_BOOTROM_SUPPORT
1468 bool "Support returning to the BOOTROM (from TPL)"
1470 Some platforms (e.g. the Rockchip RK3368) provide support in their
1471 ROM for loading the next boot-stage after performing basic setup
1474 Enable this option, to return to the BOOTROM through the
1475 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1476 boot device list, if not implemented for a given board)
1478 config TPL_DRIVERS_MISC_SUPPORT
1479 bool "Support misc drivers in TPL"
1481 Enable miscellaneous drivers in TPL. These drivers perform various
1482 tasks that don't fall nicely into other categories, Enable this
1483 option to build the drivers in drivers/misc as part of an TPL
1484 build, for those that support building in TPL (not all drivers do).
1486 config TPL_ENV_SUPPORT
1487 bool "Support an environment"
1489 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1491 config TPL_GPIO_SUPPORT
1492 bool "Support GPIO in TPL"
1494 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1495 GPIOs allow U-Boot to read the state of an input line (high or
1496 low) and set the state of an output line. This can be used to
1497 drive LEDs, control power to various system parts and read user
1498 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1499 for example. Enable this option to build the drivers in
1500 drivers/gpio as part of an TPL build.
1502 config TPL_I2C_SUPPORT
1505 Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
1508 config TPL_LIBCOMMON_SUPPORT
1509 bool "Support common libraries"
1511 Enable support for common U-Boot libraries within TPL. See
1512 SPL_LIBCOMMON_SUPPORT for details.
1514 config TPL_LIBGENERIC_SUPPORT
1515 bool "Support generic libraries"
1517 Enable support for generic U-Boot libraries within TPL. See
1518 SPL_LIBGENERIC_SUPPORT for details.
1520 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1521 bool "Support MPC8XXX DDR init"
1523 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1524 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1526 config TPL_MMC_SUPPORT
1530 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1532 config TPL_NAND_SUPPORT
1533 bool "Support NAND flash"
1535 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1538 bool "Support PCI drivers"
1540 Enable support for PCI in TPL. For platforms that need PCI to boot,
1541 or must perform some init using PCI in SPL, this provides the
1542 necessary driver support. This enables the drivers in drivers/pci
1543 as part of a TPL build.
1545 config TPL_PCH_SUPPORT
1546 bool "Support PCH drivers"
1548 Enable support for PCH (Platform Controller Hub) devices in TPL.
1549 These are used to set up GPIOs and the SPI peripheral early in
1550 boot. This enables the drivers in drivers/pch as part of a TPL
1553 config TPL_RAM_SUPPORT
1554 bool "Support booting from RAM"
1556 Enable booting of an image in RAM. The image can be preloaded or
1557 it can be loaded by TPL directly into RAM (e.g. using USB).
1559 config TPL_RAM_DEVICE
1560 bool "Support booting from preloaded image in RAM"
1561 depends on TPL_RAM_SUPPORT
1563 Enable booting of an image already loaded in RAM. The image has to
1564 be already in memory when TPL takes over, e.g. loaded by the boot
1567 config TPL_RTC_SUPPORT
1568 bool "Support RTC drivers"
1570 Enable RTC (Real-time Clock) support in TPL. This includes support
1571 for reading and setting the time. Some RTC devices also have some
1572 non-volatile (battery-backed) memory which is accessible if
1573 needed. This enables the drivers in drivers/rtc as part of an TPL
1576 config TPL_SERIAL_SUPPORT
1577 bool "Support serial"
1581 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1584 config TPL_SPI_FLASH_SUPPORT
1585 bool "Support SPI flash drivers"
1587 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1590 config TPL_SPI_FLASH_TINY
1591 bool "Enable low footprint TPL SPI Flash support"
1592 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1593 default y if SPI_FLASH
1595 Enable lightweight TPL SPI Flash support that supports just reading
1596 data/images from flash. No support to write/erase flash. Enable
1597 this if you have TPL size limitations and don't need full-fledged
1601 bool "Support loading from SPI flash"
1602 depends on TPL_SPI_FLASH_SUPPORT
1604 Enable support for loading next stage, U-Boot or otherwise, from
1605 SPI NOR in U-Boot TPL.
1607 config TPL_SPI_SUPPORT
1608 bool "Support SPI drivers"
1610 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1614 bool "Support SPI DM drivers in TPL"
1616 Enable support for SPI DM drivers in TPL.
1618 config TPL_DM_SPI_FLASH
1619 bool "Support SPI DM FLASH drivers in TPL"
1621 Enable support for SPI DM flash drivers in TPL.
1623 config TPL_YMODEM_SUPPORT
1624 bool "Support loading using Ymodem"
1625 depends on TPL_SERIAL_SUPPORT
1627 While loading from serial is slow it can be a useful backup when
1628 there is no other option. The Ymodem protocol provides a reliable
1629 means of transmitting U-Boot over a serial line for using in TPL,
1630 with a checksum to ensure correctness.
1634 config SPL_AT91_MCK_BYPASS
1635 bool "Use external clock signal as a source of main clock for AT91 platforms"
1636 depends on ARCH_AT91
1639 Use external 8 to 24 Mhz clock signal as source of main clock instead
1640 of an external crystal oscillator.
1641 This option disables the internal driving on the XOUT pin.
1642 The external source has to provide a stable clock on the XIN pin.
1643 If this option is disabled, the SoC expects a crystal oscillator
1644 that needs driving on both XIN and XOUT lines.