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 || \
334 TARGET_SIFIVE_UNLEASHED
336 Use sector number for specifying U-Boot location on MMC/SD in
339 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
340 hex "Address on the MMC to load U-Boot from"
341 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
342 default 0x40 if ARCH_SUNXI
343 default 0x75 if ARCH_DAVINCI
344 default 0x8a if ARCH_MX6 || ARCH_MX7
345 default 0x100 if ARCH_UNIPHIER
346 default 0x140 if ARCH_MVEBU
347 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
348 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
349 OMAP54XX || AM33XX || AM43XX || ARCH_K3
350 default 0x4000 if ARCH_ROCKCHIP
351 default 0x822 if TARGET_SIFIVE_UNLEASHED
353 Address on the MMC to load U-Boot from, when the MMC is being used
354 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
356 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
357 hex "U-Boot main hardware partition image offset"
358 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
359 default 0x10 if ARCH_SUNXI
362 On some platforms SPL location depends on hardware partition. The ROM
363 code skips the MBR sector when loading SPL from main hardware data
364 partition. This adds offset to the main U-Boot image. Set this symbol
365 to the number of skipped sectors.
367 If unsure, leave the default.
369 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
370 bool "MMC Raw mode: by partition"
372 Use a partition for loading U-Boot when using MMC/SD in raw mode.
374 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
375 hex "Partition to use to load U-Boot from"
376 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
379 Partition on the MMC to load U-Boot from when the MMC is being
382 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
383 bool "MMC raw mode: by partition type"
384 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
386 Use partition type for specifying U-Boot partition on MMC/SD in
387 raw mode. U-Boot will be loaded from the first partition of this
390 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
391 hex "Partition Type on the MMC to load U-Boot from"
392 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
394 Partition Type on the MMC to load U-Boot from, when the MMC is being
397 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
398 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
399 depends on SUPPORT_EMMC_BOOT
401 eMMC boot partition is normally configured by the bits of the EXT_CSD
402 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
403 cases it might be required in SPL to load the image from different
404 partition than the partition selected by EXT_CSC_PART_CONFIG register.
405 Enable this option if you intend to use an eMMC boot partition other
406 then selected via EXT_CSC_PART_CONFIG register and specify the custom
407 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
410 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
411 int "Number of the eMMC boot partition to use"
412 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
415 eMMC boot partition number to use when the eMMC in raw mode and
416 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
417 by user defined partition number.
419 config SPL_CRC32_SUPPORT
421 default y if SPL_LEGACY_IMAGE_SUPPORT
423 Enable this to support CRC32 in uImages or FIT images within SPL.
424 This is a 32-bit checksum value that can be used to verify images.
425 For FIT images, this is the least secure type of checksum, suitable
426 for detected accidental image corruption. For secure applications you
427 should consider SHA1 or SHA256.
429 config SPL_MD5_SUPPORT
433 Enable this to support MD5 in FIT images within SPL. An MD5
434 checksum is a 128-bit hash value used to check that the image
435 contents have not been corrupted. Note that MD5 is not considered
436 secure as it is possible (with a brute-force attack) to adjust the
437 image while still retaining the same MD5 hash value. For secure
438 applications where images may be changed maliciously, you should
439 consider SHA256 or SHA384.
441 config SPL_SHA1_SUPPORT
446 Enable this to support SHA1 in FIT images within SPL. A SHA1
447 checksum is a 160-bit (20-byte) hash value used to check that the
448 image contents have not been corrupted or maliciously altered.
449 While SHA1 is fairly secure it is coming to the end of its life
450 due to the expanding computing power available to brute-force
451 attacks. For more security, consider SHA256 or SHA384.
453 config SPL_SHA256_SUPPORT
454 bool "Support SHA256"
458 Enable this to support SHA256 in FIT images within SPL. A SHA256
459 checksum is a 256-bit (32-byte) hash value used to check that the
460 image contents have not been corrupted.
462 config SPL_SHA384_SUPPORT
463 bool "Support SHA384"
468 Enable this to support SHA384 in FIT images within SPL. A SHA384
469 checksum is a 384-bit (48-byte) hash value used to check that the
470 image contents have not been corrupted. Use this for the highest
473 config SPL_SHA512_SUPPORT
474 bool "Support SHA512"
479 Enable this to support SHA512 in FIT images within SPL. A SHA512
480 checksum is a 512-bit (64-byte) hash value used to check that the
481 image contents have not been corrupted.
483 config SPL_FIT_IMAGE_TINY
484 bool "Remove functionality from SPL FIT loading to reduce size"
486 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
487 default y if ARCH_IMX8M
489 Enable this to reduce the size of the FIT image loading code
490 in SPL, if space for the SPL binary is very tight.
492 This skips the recording of each loaded payload
493 (i.e. loadable) into the FDT (modifying the loaded FDT to
494 ensure this information is available to the next image
497 config SPL_CACHE_SUPPORT
498 bool "Support CACHE drivers"
500 Enable CACHE drivers in SPL. These drivers can keep data so that
501 future requests for that data can be served faster. Enable this option
502 to build the drivers in drivers/cache as part of an SPL build.
505 bool "Support CPU drivers"
507 Enable this to support CPU drivers in SPL. These drivers can set
508 up CPUs and provide information about them such as the model and
509 name. This can be useful in SPL since setting up the CPUs earlier
510 may improve boot performance. Enable this option to build the
511 drivers in drivers/cpu as part of an SPL build.
513 config SPL_CRYPTO_SUPPORT
514 bool "Support crypto drivers"
516 Enable crypto drivers in SPL. These drivers can be used to
517 accelerate secure boot processing in secure applications. Enable
518 this option to build the drivers in drivers/crypto as part of an
521 config SPL_HASH_SUPPORT
522 bool "Support hashing drivers"
526 Enable hashing drivers in SPL. These drivers can be used to
527 accelerate secure boot processing in secure applications. Enable
528 this option to build system-specific drivers for hash acceleration
529 as part of an SPL build.
531 config TPL_HASH_SUPPORT
532 bool "Support hashing drivers in TPL"
537 Enable hashing drivers in SPL. These drivers can be used to
538 accelerate secure boot processing in secure applications. Enable
539 this option to build system-specific drivers for hash acceleration
540 as part of an SPL build.
543 bool "Support DMA drivers"
545 Enable DMA (direct-memory-access) drivers in SPL. These drivers
546 can be used to handle memory-to-peripheral data transfer without
547 the CPU moving the data. Enable this option to build the drivers
548 in drivers/dma as part of an SPL build.
550 config SPL_DRIVERS_MISC_SUPPORT
551 bool "Support misc drivers"
553 Enable miscellaneous drivers in SPL. These drivers perform various
554 tasks that don't fall nicely into other categories, Enable this
555 option to build the drivers in drivers/misc as part of an SPL
556 build, for those that support building in SPL (not all drivers do).
558 config SPL_ENV_SUPPORT
559 bool "Support an environment"
561 Enable environment support in SPL. The U-Boot environment provides
562 a number of settings (essentially name/value pairs) which can
563 control many aspects of U-Boot's operation. Normally this is not
564 needed in SPL as it has a much simpler task with less
565 configuration. But some boards use this to support 'Falcon' boot
566 on EXT2 and FAT, where SPL boots directly into Linux without
567 starting U-Boot first. Enabling this option will make env_get()
568 and env_set() available in SPL.
571 bool "Support save environment"
572 depends on SPL_ENV_SUPPORT
573 select SPL_MMC_WRITE if ENV_IS_IN_MMC
575 Enable save environment support in SPL after setenv. By default
576 the saveenv option is not provided in SPL, but some boards need
577 this support in 'Falcon' boot, where SPL need to boot from
578 different images based on environment variable set by OS. For
579 example OS may set "reboot_image" environment variable to
580 "recovery" inorder to boot recovery image by SPL. The SPL read
581 "reboot_image" and act accordingly and change the reboot_image
582 to default mode using setenv and save the environment.
584 config SPL_ETH_SUPPORT
585 bool "Support Ethernet"
586 depends on SPL_ENV_SUPPORT
588 Enable access to the network subsystem and associated Ethernet
589 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
590 link rather than from an on-board peripheral. Environment support
591 is required since the network stack uses a number of environment
592 variables. See also SPL_NET_SUPPORT.
595 bool "Support EXT filesystems"
597 Enable support for EXT2/3/4 filesystems with SPL. This permits
598 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
599 filesystem from within SPL. Support for the underlying block
600 device (e.g. MMC or USB) must be enabled separately.
602 config SPL_FS_SQUASHFS
603 bool "Support SquashFS filesystems"
606 Enable support for SquashFS filesystems with SPL. This permits
607 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
608 filesystem from within SPL. Support for the underlying block
609 device (e.g. MMC or USB) must be enabled separately.
612 bool "Support FAT filesystems"
615 Enable support for FAT and VFAT filesystems with SPL. This
616 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
617 filesystem from within SPL. Support for the underlying block
618 device (e.g. MMC or USB) must be enabled separately.
621 bool "Support write for FAT filesystems"
623 Enable write support for FAT and VFAT filesystems with SPL.
624 Support for the underlying block device (e.g. MMC or USB) must be
630 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
631 provide software-configurable hardware which is typically used to
632 implement peripherals (such as UARTs, LCD displays, MMC) or
633 accelerate custom processing functions, such as image processing
634 or machine learning. Sometimes it is useful to program the FPGA
635 as early as possible during boot, and this option can enable that
638 config SPL_GPIO_SUPPORT
639 bool "Support GPIO in SPL"
641 Enable support for GPIOs (General-purpose Input/Output) in SPL.
642 GPIOs allow U-Boot to read the state of an input line (high or
643 low) and set the state of an output line. This can be used to
644 drive LEDs, control power to various system parts and read user
645 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
646 for example. Enable this option to build the drivers in
647 drivers/gpio as part of an SPL build.
649 config SPL_I2C_SUPPORT
652 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
653 I2C works with a clock and data line which can be driven by a
654 one or more masters or slaves. It is a fairly complex bus but is
655 widely used as it only needs two lines for communication. Speeds of
656 400kbps are typical but up to 3.4Mbps is supported by some
657 hardware. I2C can be useful in SPL to configure power management
658 ICs (PMICs) before raising the CPU clock speed, for example.
659 Enable this option to build the drivers in drivers/i2c as part of
662 config SPL_LIBCOMMON_SUPPORT
663 bool "Support common libraries"
665 Enable support for common U-Boot libraries within SPL. These
666 libraries include common code to deal with U-Boot images,
667 environment and USB, for example. This option is enabled on many
668 boards. Enable this option to build the code in common/ as part of
671 config SPL_LIBDISK_SUPPORT
672 bool "Support disk partitions"
675 Enable support for disk partitions within SPL. 'Disk' is something
676 of a misnomer as it includes non-spinning media such as flash (as
677 used in MMC and USB sticks). Partitions provide a way for a disk
678 to be split up into separate regions, with a partition table placed
679 at the start or end which describes the location and size of each
680 'partition'. These partitions are typically uses as individual block
681 devices, typically with an EXT2 or FAT filesystem in each. This
682 option enables whatever partition support has been enabled in
683 U-Boot to also be used in SPL. It brings in the code in disk/.
685 config SPL_LIBGENERIC_SUPPORT
686 bool "Support generic libraries"
688 Enable support for generic U-Boot libraries within SPL. These
689 libraries include generic code to deal with device tree, hashing,
690 printf(), compression and the like. This option is enabled on many
691 boards. Enable this option to build the code in lib/ as part of an
694 config SPL_DM_MAILBOX
695 bool "Support Mailbox"
697 Enable support for Mailbox within SPL. This enable the inter
698 processor communication protocols tobe used within SPL. Enable
699 this option to build the drivers in drivers/mailbox as part of
702 config SPL_MMC_SUPPORT
705 select HAVE_BLOCK_DEVICE
707 Enable support for MMC (Multimedia Card) within SPL. This enables
708 the MMC protocol implementation and allows any enabled drivers to
709 be used within SPL. MMC can be used with or without disk partition
710 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
711 this option to build the drivers in drivers/mmc as part of an SPL
714 config SYS_MMCSD_FS_BOOT_PARTITION
715 int "MMC Boot Partition"
718 Partition on the MMC to load U-Boot from when the MMC is being
722 bool "Tiny MMC framework in SPL"
723 depends on SPL_MMC_SUPPORT
726 Enable MMC framework tinification support. This option is useful if
727 if your SPL is extremely size constrained. Heed the warning, enable
728 this option if and only if you know exactly what you are doing, if
729 you are reading this help text, you most likely have no idea :-)
731 The MMC framework is reduced to bare minimum to be useful. No malloc
732 support is needed for the MMC framework operation with this option
733 enabled. The framework supports exactly one MMC device and exactly
734 one MMC driver. The MMC driver can be adjusted to avoid any malloc
735 operations too, which can remove the need for malloc support in SPL
736 and thus further reduce footprint.
739 bool "MMC/SD/SDIO card support for write operations in SPL"
740 depends on SPL_MMC_SUPPORT
743 Enable write access to MMC and SD Cards in SPL
746 config SPL_MPC8XXX_INIT_DDR_SUPPORT
747 bool "Support MPC8XXX DDR init"
749 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
750 random-access memory) on the MPC8XXX family within SPL. This
751 allows DRAM to be set up before loading U-Boot into that DRAM,
754 config SPL_MTD_SUPPORT
755 bool "Support MTD drivers"
757 Enable support for MTD (Memory Technology Device) within SPL. MTD
758 provides a block interface over raw NAND and can also be used with
759 SPI flash. This allows SPL to load U-Boot from supported MTD
760 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
761 to enable specific MTD drivers.
763 config SPL_MUSB_NEW_SUPPORT
764 bool "Support new Mentor Graphics USB"
766 Enable support for Mentor Graphics USB in SPL. This is a new
767 driver used by some boards. Enable this option to build
768 the drivers in drivers/usb/musb-new as part of an SPL build. The
769 old drivers are in drivers/usb/musb.
771 config SPL_NAND_SUPPORT
772 bool "Support NAND flash"
774 Enable support for NAND (Negative AND) flash in SPL. NAND flash
775 can be used to allow SPL to load U-Boot from supported devices.
776 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
779 config SPL_NAND_DRIVERS
780 bool "Use standard NAND driver"
782 SPL uses normal NAND drivers, not minimal drivers.
785 bool "Include standard software ECC in the SPL"
787 config SPL_NAND_SIMPLE
788 bool "Support simple NAND drivers in SPL"
790 Support for NAND boot using simple NAND drivers that
791 expose the cmd_ctrl() interface.
794 depends on SPL_NAND_DRIVERS
795 bool "Use Base NAND Driver"
797 Include nand_base.c in the SPL.
799 config SPL_NAND_IDENT
800 depends on SPL_NAND_BASE
801 bool "Use chip ID to identify NAND flash"
803 SPL uses the chip ID list to identify the NAND flash.
808 Enable support for loading payloads from UBI. See
809 README.ubispl for more info.
814 bool "Support cache drivers in SPL"
816 Enable support for cache drivers in SPL.
819 bool "Support SPI DM drivers in SPL"
821 Enable support for SPI DM drivers in SPL.
823 config SPL_DM_SPI_FLASH
824 bool "Support SPI DM FLASH drivers in SPL"
826 Enable support for SPI DM flash drivers in SPL.
830 config SPL_UBI_LOAD_BY_VOLNAME
831 bool "Support loading volumes by name"
833 This enables support for loading UBI volumes by name. When this
834 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
835 configure the volume name from which to load U-Boot.
837 config SPL_UBI_MAX_VOL_LEBS
838 int "Maximum number of LEBs per volume"
841 The maximum number of logical eraseblocks which a static volume
842 to load can contain. Used for sizing the scan data structure.
844 config SPL_UBI_MAX_PEB_SIZE
845 int "Maximum PEB size"
848 The maximum physical erase block size.
850 config SPL_UBI_MAX_PEBS
851 int "Maximum number of PEBs"
854 The maximum physical erase block size. If not overridden by
855 board code, this value will be used as the actual number of PEBs.
857 config SPL_UBI_PEB_OFFSET
858 int "Offset to first UBI PEB"
861 The offset in number of PEBs from the start of flash to the first
862 PEB part of the UBI image.
864 config SPL_UBI_VID_OFFSET
865 int "Offset to VID header"
868 config SPL_UBI_LEB_START
869 int "Offset to LEB in PEB"
872 The offset in bytes to the LEB within a PEB.
874 config SPL_UBI_INFO_ADDR
875 hex "Address to place UBI scan info"
878 Address for ubispl to place the scan info. Read README.ubispl to
879 determine the required size
881 config SPL_UBI_VOL_IDS
882 int "Maximum volume id"
885 The maximum volume id which can be loaded. Used for sizing the
888 config SPL_UBI_LOAD_MONITOR_ID
889 int "id of U-Boot volume"
892 The UBI volume id from which to load U-Boot
894 config SPL_UBI_LOAD_MONITOR_VOLNAME
895 string "volume name of U-Boot volume"
896 depends on SPL_UBI_LOAD_BY_VOLNAME
898 The UBI volume name from which to load U-Boot
900 config SPL_UBI_LOAD_KERNEL_ID
901 int "id of kernel volume"
902 depends on SPL_OS_BOOT && SPL_UBI
904 The UBI volume id from which to load the kernel
906 config SPL_UBI_LOAD_ARGS_ID
907 int "id of kernel args volume"
908 depends on SPL_OS_BOOT && SPL_UBI
910 The UBI volume id from which to load the device tree
912 config UBI_SPL_SILENCE_MSG
913 bool "silence UBI SPL messages"
916 Disable messages from UBI SPL. This leaves warnings
921 config SPL_NET_SUPPORT
922 bool "Support networking"
924 Enable support for network devices (such as Ethernet) in SPL.
925 This permits SPL to load U-Boot over a network link rather than
926 from an on-board peripheral. Environment support is required since
927 the network stack uses a number of environment variables. See also
931 config SPL_NET_VCI_STRING
932 string "BOOTP Vendor Class Identifier string sent by SPL"
934 As defined by RFC 2132 the vendor class identifier field can be
935 sent by the client to identify the vendor type and configuration
936 of a client. This is often used in practice to allow for the DHCP
937 server to specify different files to load depending on if the ROM,
938 SPL or U-Boot itself makes the request
939 endif # if SPL_NET_SUPPORT
941 config SPL_NO_CPU_SUPPORT
942 bool "Drop CPU code in SPL"
944 This is specific to the ARM926EJ-S CPU. It disables the standard
945 start.S start-up code, presumably so that a replacement can be
946 used on that CPU. You should not enable it unless you know what
949 config SPL_NOR_SUPPORT
950 bool "Support NOR flash"
952 Enable support for loading U-Boot from memory-mapped NOR (Negative
953 OR) flash in SPL. NOR flash is slow to write but fast to read, and
954 a memory-mapped device makes it very easy to access. Loading from
955 NOR is typically achieved with just a memcpy().
957 config SPL_XIP_SUPPORT
961 Enable support for execute in place of U-Boot or kernel image. There
962 is no need to copy image from flash to ram if flash supports execute
963 in place. Its very useful in systems having enough flash but not
964 enough ram to load the image.
966 config SPL_ONENAND_SUPPORT
967 bool "Support OneNAND flash"
969 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
970 a type of NAND flash and therefore can be used to allow SPL to
971 load U-Boot from supported devices. This enables the drivers in
972 drivers/mtd/onenand as part of an SPL build.
975 bool "Activate Falcon Mode"
976 depends on !TI_SECURE_DEVICE
979 Enable booting directly to an OS from SPL.
980 for more info read doc/README.falcon
984 hex "addr, where OS is found"
985 depends on SPL_NOR_SUPPORT
987 Specify the address, where the OS image is found, which
994 default "tpl/u-boot-with-tpl.bin" if TPL
997 Payload for SPL boot. For backward compatibility, default to
998 u-boot.bin, i.e. RAW image without any header. In case of
999 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1003 bool "Support PCI drivers"
1005 Enable support for PCI in SPL. For platforms that need PCI to boot,
1006 or must perform some init using PCI in SPL, this provides the
1007 necessary driver support. This enables the drivers in drivers/pci
1008 as part of an SPL build.
1010 config SPL_PCH_SUPPORT
1011 bool "Support PCH drivers"
1013 Enable support for PCH (Platform Controller Hub) devices in SPL.
1014 These are used to set up GPIOs and the SPI peripheral early in
1015 boot. This enables the drivers in drivers/pch as part of an SPL
1018 config SPL_POST_MEM_SUPPORT
1019 bool "Support POST drivers"
1021 Enable support for POST (Power-on Self Test) in SPL. POST is a
1022 procedure that checks that the hardware (CPU or board) appears to
1023 be functionally correctly. It is a sanity check that can be
1024 performed before booting. This enables the drivers in post/drivers
1025 as part of an SPL build.
1028 bool "Support reset drivers"
1031 Enable support for reset control in SPL.
1032 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1033 by using the generic reset API provided by driver model.
1034 This enables the drivers in drivers/reset as part of an SPL build.
1036 config SPL_POWER_SUPPORT
1037 bool "Support power drivers"
1039 Enable support for power control in SPL. This includes support
1040 for PMICs (Power-management Integrated Circuits) and some of the
1041 features provided by PMICs. In particular, voltage regulators can
1042 be used to enable/disable power and vary its voltage. That can be
1043 useful in SPL to turn on boot peripherals and adjust CPU voltage
1044 so that the clock speed can be increased. This enables the drivers
1045 in drivers/power, drivers/power/pmic and drivers/power/regulator
1046 as part of an SPL build.
1048 config SPL_POWER_DOMAIN
1049 bool "Support power domain drivers"
1051 Enable support for power domain control in SPL. Many SoCs allow
1052 power to be applied to or removed from portions of the SoC (power
1053 domains). This may be used to save power. This API provides the
1054 means to control such power management hardware. This enables
1055 the drivers in drivers/power/domain as part of a SPL build.
1057 config SPL_RAM_SUPPORT
1058 bool "Support booting from RAM"
1059 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1061 Enable booting of an image in RAM. The image can be preloaded or
1062 it can be loaded by SPL directly into RAM (e.g. using USB).
1064 config SPL_RAM_DEVICE
1065 bool "Support booting from preloaded image in RAM"
1066 depends on SPL_RAM_SUPPORT
1067 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1069 Enable booting of an image already loaded in RAM. The image has to
1070 be already in memory when SPL takes over, e.g. loaded by the boot
1073 config SPL_REMOTEPROC
1074 bool "Support REMOTEPROCS"
1076 Enable support for REMOTEPROCs in SPL. This permits to load
1077 a remote processor firmware in SPL.
1079 config SPL_RTC_SUPPORT
1080 bool "Support RTC drivers"
1082 Enable RTC (Real-time Clock) support in SPL. This includes support
1083 for reading and setting the time. Some RTC devices also have some
1084 non-volatile (battery-backed) memory which is accessible if
1085 needed. This enables the drivers in drivers/rtc as part of an SPL
1088 config SPL_SATA_SUPPORT
1089 bool "Support loading from SATA"
1091 Enable support for SATA (Serial AT attachment) in SPL. This allows
1092 use of SATA devices such as hard drives and flash drivers for
1093 loading U-Boot. SATA is used in higher-end embedded systems and
1094 can provide higher performance than MMC , at somewhat higher
1095 expense and power consumption. This enables loading from SATA
1096 using a configured device.
1098 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1099 bool "SATA raw mode: by sector"
1100 depends on SPL_SATA_SUPPORT
1102 Use sector number for specifying U-Boot location on SATA disk in
1105 config SPL_SATA_RAW_U_BOOT_SECTOR
1106 hex "Sector on the SATA disk to load U-Boot from"
1107 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1109 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1110 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1112 config SPL_SERIAL_SUPPORT
1113 bool "Support serial"
1117 Enable support for serial in SPL. This allows use of a serial UART
1118 for displaying messages while SPL is running. It also brings in
1119 printf() and panic() functions. This should normally be enabled
1120 unless there are space reasons not to. Even then, consider
1121 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1123 config SPL_SPI_SUPPORT
1124 bool "Support SPI drivers"
1126 Enable support for using SPI in SPL. This is used for connecting
1127 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1128 more details on that. The SPI driver provides the transport for
1129 data between the SPI flash and the CPU. This option can be used to
1130 enable SPI drivers that are needed for other purposes also, such
1133 config SPL_SPI_FLASH_SUPPORT
1134 bool "Support SPI flash drivers"
1135 depends on SPL_SPI_SUPPORT
1137 Enable support for using SPI flash in SPL, and loading U-Boot from
1138 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1139 the SPI bus that is used to connect it to a system. It is a simple
1140 but fast bidirectional 4-wire bus (clock, chip select and two data
1141 lines). This enables the drivers in drivers/mtd/spi as part of an
1142 SPL build. This normally requires SPL_SPI_SUPPORT.
1144 if SPL_SPI_FLASH_SUPPORT
1146 config SPL_SPI_FLASH_TINY
1147 bool "Enable low footprint SPL SPI Flash support"
1148 depends on !SPI_FLASH_BAR
1149 default y if SPI_FLASH
1151 Enable lightweight SPL SPI Flash support that supports just reading
1152 data/images from flash. No support to write/erase flash. Enable
1153 this if you have SPL size limitations and don't need full
1154 fledged SPI flash support.
1156 config SPL_SPI_FLASH_SFDP_SUPPORT
1157 bool "SFDP table parsing support for SPI NOR flashes"
1158 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1160 Enable support for parsing and auto discovery of parameters for
1161 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1162 tables as per JESD216 standard in SPL.
1164 config SPL_SPI_FLASH_MTD
1165 bool "Support for SPI flash MTD drivers in SPL"
1167 Enable support for SPI flash MTD drivers in SPL.
1170 bool "Support loading from SPI flash"
1172 Enable support for loading next stage, U-Boot or otherwise, from
1173 SPI NOR in U-Boot SPL.
1175 endif # SPL_SPI_FLASH_SUPPORT
1177 config SYS_SPI_U_BOOT_OFFS
1178 hex "address of u-boot payload in SPI flash"
1179 default 0x8000 if ARCH_SUNXI
1181 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1183 Address within SPI-Flash from where the u-boot payload is fetched
1187 bool "Driver support for thermal devices"
1189 Enable support for temperature-sensing devices. Some SoCs have on-chip
1190 temperature sensors to permit warnings, speed throttling or even
1191 automatic power-off when the temperature gets too high or low. Other
1192 devices may be discrete but connected on a suitable bus.
1194 config SPL_USB_HOST_SUPPORT
1195 bool "Support USB host drivers"
1196 select HAVE_BLOCK_DEVICE
1198 Enable access to USB (Universal Serial Bus) host devices so that
1199 SPL can load U-Boot from a connected USB peripheral, such as a USB
1200 flash stick. While USB takes a little longer to start up than most
1201 buses, it is very flexible since many different types of storage
1202 device can be attached. This option enables the drivers in
1203 drivers/usb/host as part of an SPL build.
1205 config SPL_USB_STORAGE
1206 bool "Support loading from USB"
1207 depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
1209 Enable support for USB devices in SPL. This allows use of USB
1210 devices such as hard drives and flash drivers for loading U-Boot.
1211 The actual drivers are enabled separately using the normal U-Boot
1212 config options. This enables loading from USB using a configured
1215 config SPL_USB_GADGET
1216 bool "Suppport USB Gadget drivers"
1218 Enable USB Gadget API which allows to enable USB device functions
1223 config SPL_USB_ETHER
1224 bool "Support USB Ethernet drivers"
1226 Enable access to the USB network subsystem and associated
1227 drivers in SPL. This permits SPL to load U-Boot over a
1228 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1229 than from an onboard peripheral. Environment support is required
1230 since the network stack uses a number of environment variables.
1231 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
1234 bool "Support DFU (Device Firmware Upgrade)"
1235 select SPL_HASH_SUPPORT
1236 select SPL_DFU_NO_RESET
1237 depends on SPL_RAM_SUPPORT
1239 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1240 RAM memory device support. The ROM code will load and execute
1241 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1242 selected device partition from host-pc using dfu-utils.
1243 This feature is useful to flash the binaries to factory or bare-metal
1244 boards using USB interface.
1247 bool "DFU device selection"
1252 depends on SPL_DFU && SPL_RAM_SUPPORT
1254 select RAM/DDR memory device for loading binary images
1255 (u-boot/kernel) to the selected device partition using
1256 DFU and execute the u-boot/kernel from RAM.
1260 config SPL_USB_SDP_SUPPORT
1261 bool "Support SDP (Serial Download Protocol)"
1262 depends on SPL_SERIAL_SUPPORT
1264 Enable Serial Download Protocol (SDP) device support in SPL. This
1265 allows to download images into memory and execute (jump to) them
1266 using the same protocol as implemented by the i.MX family's boot ROM.
1268 config SPL_SDP_USB_DEV
1269 int "SDP USB controller index"
1271 depends on SPL_USB_SDP_SUPPORT
1273 Some boards have USB controller other than 0. Define this option
1274 so it can be used in compiled environment.
1277 config SPL_WATCHDOG_SUPPORT
1278 bool "Support watchdog drivers"
1279 imply SPL_WDT if !HW_WATCHDOG
1281 Enable support for watchdog drivers in SPL. A watchdog is
1282 typically a hardware peripheral which can reset the system when it
1283 detects no activity for a while (such as a software crash). This
1284 enables the drivers in drivers/watchdog as part of an SPL build.
1286 config SPL_YMODEM_SUPPORT
1287 bool "Support loading using Ymodem"
1288 depends on SPL_SERIAL_SUPPORT
1290 While loading from serial is slow it can be a useful backup when
1291 there is no other option. The Ymodem protocol provides a reliable
1292 means of transmitting U-Boot over a serial line for using in SPL,
1293 with a checksum to ensure correctness.
1296 bool "Support ARM Trusted Firmware"
1297 depends on ARM64 && SPL_FIT
1299 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1300 is loaded by SPL (which is considered as BL2 in ATF terminology).
1301 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1303 config SPL_ATF_LOAD_IMAGE_V2
1304 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1307 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1309 If you want to load a bl31 image from the SPL and need the new
1312 config SPL_ATF_NO_PLATFORM_PARAM
1313 bool "Pass no platform parameter"
1316 While we expect to call a pointer to a valid FDT (or NULL)
1317 as the platform parameter to an ATF, some ATF versions are
1318 not U-Boot aware and have an insufficiently robust parameter
1319 validation to gracefully reject a FDT being passed.
1321 If this option is enabled, the spl_atf os-type handler will
1322 always pass NULL for the platform parameter.
1324 If your ATF is affected, say Y.
1326 config SPL_AM33XX_ENABLE_RTC32K_OSC
1327 bool "Enable the RTC32K OSC on AM33xx based platforms"
1330 Enable access to the AM33xx RTC and select the external 32kHz clock
1334 bool "Support OP-TEE Trusted OS"
1337 OP-TEE is an open source Trusted OS which is loaded by SPL.
1338 More detail at: https://github.com/OP-TEE/optee_os
1341 bool "Support RISC-V OpenSBI"
1342 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1344 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1345 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1346 firmware. It is loaded and started by U-Boot SPL.
1348 More details are available at https://github.com/riscv/opensbi and
1349 https://github.com/riscv/riscv-sbi-doc
1351 config SPL_OPENSBI_LOAD_ADDR
1352 hex "OpenSBI load address"
1353 depends on SPL_OPENSBI
1355 Load address of the OpenSBI binary.
1359 depends on SUPPORT_TPL
1362 If you want to build TPL as well as the normal image and SPL, say Y.
1366 config TPL_SIZE_LIMIT
1367 hex "Maximum size of TPL image"
1371 Specifies the maximum length of the U-Boot TPL image.
1372 If this value is zero, it is ignored.
1374 config TPL_FRAMEWORK
1375 bool "Support TPL based upon the common SPL framework"
1376 default y if SPL_FRAMEWORK
1378 Enable the SPL framework under common/spl/ for TPL builds.
1379 This framework supports MMC, NAND and YMODEM and other methods
1380 loading of U-Boot's SPL stage. If unsure, say Y.
1383 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1384 depends on HANDOFF && TPL_BLOBLIST
1387 This option enables TPL to write handoff information. This can be
1388 used to pass information like the size of SDRAM from TPL to U-Boot
1389 proper. The information is also available to SPL if it is useful
1392 config TPL_BOARD_INIT
1393 bool "Call board-specific initialization in TPL"
1395 If this option is enabled, U-Boot will call the function
1396 spl_board_init() from board_init_r(). This function should be
1397 provided by the board.
1399 config TPL_BOOTCOUNT_LIMIT
1400 bool "Support bootcount in TPL"
1401 depends on TPL_ENV_SUPPORT
1403 If this option is enabled, the TPL will support bootcount.
1404 For example, it may be useful to choose the device to boot.
1407 string "Linker script for the TPL stage"
1409 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1410 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1412 The TPL stage will usually require a different linker-script
1413 (as it runs from a different memory region) than the regular
1414 U-Boot stage. Set this to the path of the linker-script to
1417 May be left empty to trigger the Makefile infrastructure to
1418 fall back to the linker-script used for the SPL stage.
1420 config TPL_NEEDS_SEPARATE_TEXT_BASE
1421 bool "TPL needs a separate text-base"
1425 Enable, if the TPL stage should not inherit its text-base
1426 from the SPL stage. When enabled, a base address for the
1427 .text sections of the TPL stage has to be set below.
1429 config TPL_NEEDS_SEPARATE_STACK
1430 bool "TPL needs a separate initial stack-pointer"
1434 Enable, if the TPL stage should not inherit its initial
1435 stack-pointer from the settings for the SPL stage.
1437 config TPL_TEXT_BASE
1438 hex "Base address for the .text section of the TPL stage"
1439 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1441 The base address for the .text section of the TPL stage.
1444 int "Maximum size (in bytes) for the TPL stage"
1448 The maximum size (in bytes) of the TPL stage.
1451 hex "Address of the initial stack-pointer for the TPL stage"
1452 depends on TPL_NEEDS_SEPARATE_STACK
1454 The address of the initial stack-pointer for the TPL stage.
1455 Usually this will be the (aligned) top-of-stack.
1457 config TPL_READ_ONLY
1459 depends on TPL_OF_PLATDATA
1460 select TPL_OF_PLATDATA_NO_BIND
1461 select TPL_OF_PLATDATA_RT
1463 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1464 section of memory. This means that of-platdata must make a copy (in
1465 writeable memory) of anything it wants to modify, such as
1466 device-private data.
1468 config TPL_BOOTROM_SUPPORT
1469 bool "Support returning to the BOOTROM (from TPL)"
1471 Some platforms (e.g. the Rockchip RK3368) provide support in their
1472 ROM for loading the next boot-stage after performing basic setup
1475 Enable this option, to return to the BOOTROM through the
1476 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1477 boot device list, if not implemented for a given board)
1479 config TPL_DRIVERS_MISC_SUPPORT
1480 bool "Support misc drivers in TPL"
1482 Enable miscellaneous drivers in TPL. These drivers perform various
1483 tasks that don't fall nicely into other categories, Enable this
1484 option to build the drivers in drivers/misc as part of an TPL
1485 build, for those that support building in TPL (not all drivers do).
1487 config TPL_ENV_SUPPORT
1488 bool "Support an environment"
1490 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1492 config TPL_GPIO_SUPPORT
1493 bool "Support GPIO in TPL"
1495 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1496 GPIOs allow U-Boot to read the state of an input line (high or
1497 low) and set the state of an output line. This can be used to
1498 drive LEDs, control power to various system parts and read user
1499 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1500 for example. Enable this option to build the drivers in
1501 drivers/gpio as part of an TPL build.
1503 config TPL_I2C_SUPPORT
1506 Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
1509 config TPL_LIBCOMMON_SUPPORT
1510 bool "Support common libraries"
1512 Enable support for common U-Boot libraries within TPL. See
1513 SPL_LIBCOMMON_SUPPORT for details.
1515 config TPL_LIBGENERIC_SUPPORT
1516 bool "Support generic libraries"
1518 Enable support for generic U-Boot libraries within TPL. See
1519 SPL_LIBGENERIC_SUPPORT for details.
1521 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1522 bool "Support MPC8XXX DDR init"
1524 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1525 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1527 config TPL_MMC_SUPPORT
1531 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1533 config TPL_NAND_SUPPORT
1534 bool "Support NAND flash"
1536 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1539 bool "Support PCI drivers"
1541 Enable support for PCI in TPL. For platforms that need PCI to boot,
1542 or must perform some init using PCI in SPL, this provides the
1543 necessary driver support. This enables the drivers in drivers/pci
1544 as part of a TPL build.
1546 config TPL_PCH_SUPPORT
1547 bool "Support PCH drivers"
1549 Enable support for PCH (Platform Controller Hub) devices in TPL.
1550 These are used to set up GPIOs and the SPI peripheral early in
1551 boot. This enables the drivers in drivers/pch as part of a TPL
1554 config TPL_RAM_SUPPORT
1555 bool "Support booting from RAM"
1557 Enable booting of an image in RAM. The image can be preloaded or
1558 it can be loaded by TPL directly into RAM (e.g. using USB).
1560 config TPL_RAM_DEVICE
1561 bool "Support booting from preloaded image in RAM"
1562 depends on TPL_RAM_SUPPORT
1564 Enable booting of an image already loaded in RAM. The image has to
1565 be already in memory when TPL takes over, e.g. loaded by the boot
1568 config TPL_RTC_SUPPORT
1569 bool "Support RTC drivers"
1571 Enable RTC (Real-time Clock) support in TPL. This includes support
1572 for reading and setting the time. Some RTC devices also have some
1573 non-volatile (battery-backed) memory which is accessible if
1574 needed. This enables the drivers in drivers/rtc as part of an TPL
1577 config TPL_SERIAL_SUPPORT
1578 bool "Support serial"
1582 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1585 config TPL_SPI_FLASH_SUPPORT
1586 bool "Support SPI flash drivers"
1588 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1591 config TPL_SPI_FLASH_TINY
1592 bool "Enable low footprint TPL SPI Flash support"
1593 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1594 default y if SPI_FLASH
1596 Enable lightweight TPL SPI Flash support that supports just reading
1597 data/images from flash. No support to write/erase flash. Enable
1598 this if you have TPL size limitations and don't need full-fledged
1602 bool "Support loading from SPI flash"
1603 depends on TPL_SPI_FLASH_SUPPORT
1605 Enable support for loading next stage, U-Boot or otherwise, from
1606 SPI NOR in U-Boot TPL.
1608 config TPL_SPI_SUPPORT
1609 bool "Support SPI drivers"
1611 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1615 bool "Support SPI DM drivers in TPL"
1617 Enable support for SPI DM drivers in TPL.
1619 config TPL_DM_SPI_FLASH
1620 bool "Support SPI DM FLASH drivers in TPL"
1622 Enable support for SPI DM flash drivers in TPL.
1624 config TPL_YMODEM_SUPPORT
1625 bool "Support loading using Ymodem"
1626 depends on TPL_SERIAL_SUPPORT
1628 While loading from serial is slow it can be a useful backup when
1629 there is no other option. The Ymodem protocol provides a reliable
1630 means of transmitting U-Boot over a serial line for using in TPL,
1631 with a checksum to ensure correctness.
1635 config SPL_AT91_MCK_BYPASS
1636 bool "Use external clock signal as a source of main clock for AT91 platforms"
1637 depends on ARCH_AT91
1640 Use external 8 to 24 Mhz clock signal as source of main clock instead
1641 of an external crystal oscillator.
1642 This option disables the internal driving on the XOUT pin.
1643 The external source has to provide a stable clock on the XIN pin.
1644 If this option is disabled, the SoC expects a crystal oscillator
1645 that needs driving on both XIN and XOUT lines.