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 config SPL_SHOW_ERRORS
95 bool "Show more information when something goes wrong"
97 This enabled more verbose error messages and checking when something
98 goes wrong in SPL. For example, it shows the error code when U-Boot
99 cannot be located. This can help to diagnose the problem and figure
100 out a fix, particularly during development.
102 This adds a small amount to SPL code size, perhaps 100 bytes.
104 config SPL_BINMAN_SYMBOLS
105 bool "Declare binman symbols in SPL"
106 depends on SPL_FRAMEWORK && BINMAN
109 This enables use of symbols in SPL which refer to U-Boot, enabling SPL
110 to obtain the location of U-Boot simply by calling spl_get_image_pos()
111 and spl_get_image_size().
113 For this to work, you must have a U-Boot image in the binman image, so
114 binman can update SPL with the location of it.
116 menu "PowerPC and LayerScape SPL Boot options"
119 bool "Load SPL from NAND flash"
120 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
123 bool "Load SPL from SD Card / eMMC"
124 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
127 bool "Load SPL from SPI flash"
128 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
131 bool "Create SPL in Freescale PBI format"
132 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
135 Create boot binary having SPL binary in PBI format concatenated with
141 bool "Pass hand-off information from SPL to U-Boot proper"
142 depends on SPL && BLOBLIST
144 It is useful to be able to pass information from SPL to U-Boot
145 proper to preserve state that is known in SPL and is needed in U-Boot.
146 Enable this to locate the handoff information in U-Boot proper, early
147 in boot. It is available in gd->handoff. The state state is set up
148 in SPL (or TPL if that is being used).
153 bool "Pass hand-off information from SPL to U-Boot proper"
154 depends on HANDOFF && SPL_BLOBLIST
157 This option enables SPL to write handoff information. This can be
158 used to pass information like the size of SDRAM from SPL to U-Boot
159 proper. Also SPL can receive information from TPL in the same place
163 string "Linker script for the SPL stage"
164 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
166 The SPL stage will usually require a different linker-script
167 (as it runs from a different memory region) than the regular
168 U-Boot stage. Set this to the path of the linker-script to
173 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
174 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
175 default 0x20060 if SUN50I_GEN_H6
176 default 0x00060 if ARCH_SUNXI
177 default 0xfffc0000 if ARCH_ZYNQMP
180 The address in memory that SPL will be running from.
182 config SPL_BOARD_INIT
183 bool "Call board-specific initialization in SPL"
185 If this option is enabled, U-Boot will call the function
186 spl_board_init() from board_init_r(). This function should be
187 provided by the board.
189 config SPL_BOOTROM_SUPPORT
190 bool "Support returning to the BOOTROM"
192 Some platforms (e.g. the Rockchip RK3368) provide support in their
193 ROM for loading the next boot-stage after performing basic setup
196 Enable this option, to return to the BOOTROM through the
197 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
198 boot device list, if not implemented for a given board)
200 config SPL_BOOTCOUNT_LIMIT
201 bool "Support bootcount in SPL"
202 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
204 On some boards, which use 'falcon' mode, it is necessary to check
205 and increment the number of boot attempts. Such boards do not
206 use proper U-Boot for normal boot flow and hence needs those
207 adjustments to be done in the SPL.
209 config SPL_RAW_IMAGE_SUPPORT
210 bool "Support SPL loading and booting of RAW images"
211 default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
212 default y if !TI_SECURE_DEVICE
214 SPL will support loading and booting a RAW image when this option
215 is y. If this is not set, SPL will move on to other available
216 boot media to find a suitable image.
218 config SPL_LEGACY_IMAGE_SUPPORT
219 bool "Support SPL loading and booting of Legacy images"
220 default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
222 SPL will support loading and booting Legacy images when this option
223 is y. If this is not set, SPL will move on to other available
224 boot media to find a suitable image.
226 config SPL_LEGACY_IMAGE_CRC_CHECK
227 bool "Check CRC of Legacy images"
228 depends on SPL_LEGACY_IMAGE_SUPPORT
231 Enable this to check the CRC of Legacy images. While this increases
232 reliability, it affects both code size and boot duration.
233 If disabled, Legacy images are booted if the image magic and size
234 are correct, without further integrity checks.
236 config SPL_SYS_MALLOC_SIMPLE
238 prompt "Only use malloc_simple functions in the SPL"
240 Say Y here to only use the *_simple malloc functions from
241 malloc_simple.c, rather then using the versions from dlmalloc.c;
242 this will make the SPL binary smaller at the cost of more heap
243 usage as the *_simple malloc functions do not re-use free-ed mem.
245 config TPL_SYS_MALLOC_SIMPLE
247 prompt "Only use malloc_simple functions in the TPL"
250 Say Y here to only use the *_simple malloc functions from
251 malloc_simple.c, rather then using the versions from dlmalloc.c;
252 this will make the TPL binary smaller at the cost of more heap
253 usage as the *_simple malloc functions do not re-use free-ed mem.
256 bool "Enable SDRAM location for SPL stack"
258 SPL starts off execution in SRAM and thus typically has only a small
259 stack available. Since SPL sets up DRAM while in its board_init_f()
260 function, it is possible for the stack to move there before
261 board_init_r() is reached. This option enables a special SDRAM
262 location for the SPL stack. U-Boot SPL switches to this after
263 board_init_f() completes, and before board_init_r() starts.
265 config SPL_STACK_R_ADDR
266 depends on SPL_STACK_R
267 hex "SDRAM location for SPL stack"
268 default 0x82000000 if ARCH_OMAP2PLUS
270 Specify the address in SDRAM for the SPL stack. This will be set up
271 before board_init_r() is called.
273 config SPL_STACK_R_MALLOC_SIMPLE_LEN
274 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
275 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
278 Specify the amount of the stack to use as memory pool for
279 malloc_simple after switching the stack to DRAM. This may be set
280 to give board_init_r() a larger heap then the initial heap in
281 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
283 config SPL_SEPARATE_BSS
284 bool "BSS section is in a different memory region from text"
286 Some platforms need a large BSS region in SPL and can provide this
287 because RAM is already set up. In this case BSS can be moved to RAM.
288 This option should then be enabled so that the correct device tree
289 location is used. Normally we put the device tree at the end of BSS
290 but with this option enabled, it goes at _image_binary_end.
294 depends on SPL_OF_PLATDATA
295 # Bind cannot be supported because the udevice structs are in read-only
296 # memory so we cannot update the linked lists.
297 select SPL_OF_PLATDATA_NO_BIND
298 select SPL_OF_PLATDATA_RT
300 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
301 section of memory. This means that of-platdata must make a copy (in
302 writeable memory) of anything it wants to modify, such as
305 config SPL_BANNER_PRINT
306 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
309 If this option is enabled, SPL will print the banner with version
310 info. Disabling this option could be useful to reduce SPL boot time
311 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
313 config TPL_BANNER_PRINT
314 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
318 If this option is enabled, TPL will print the banner with version
319 info. Disabling this option could be useful to reduce TPL boot time
320 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
323 depends on ARM && !ARM64
324 bool "Allows initializing BSS early before entering board_init_f"
326 On some platform we have sufficient memory available early on to
327 allow setting up and using a basic BSS prior to entering
328 board_init_f. Activating this option will also de-activate the
329 clearing of BSS during the SPL relocation process, thus allowing
330 to carry state from board_init_f to board_init_r by way of BSS.
332 config SPL_DISPLAY_PRINT
333 bool "Display a board-specific message in SPL"
335 If this option is enabled, U-Boot will call the function
336 spl_display_print() immediately after displaying the SPL console
337 banner ("U-Boot SPL ..."). This function should be provided by
340 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
341 bool "MMC raw mode: by sector"
342 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
343 ARCH_MX6 || ARCH_MX7 || \
344 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
345 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
346 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
347 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
349 Use sector number for specifying U-Boot location on MMC/SD in
352 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
353 hex "Address on the MMC to load U-Boot from"
354 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
355 default 0x40 if ARCH_SUNXI
356 default 0x75 if ARCH_DAVINCI
357 default 0x8a if ARCH_MX6 || ARCH_MX7
358 default 0x100 if ARCH_UNIPHIER
359 default 0x0 if ARCH_MVEBU
360 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
361 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
362 OMAP54XX || AM33XX || AM43XX || ARCH_K3
363 default 0x4000 if ARCH_ROCKCHIP
364 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
366 Address on the MMC to load U-Boot from, when the MMC is being used
367 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
369 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
370 hex "U-Boot main hardware partition image offset"
371 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
372 default 0x10 if ARCH_SUNXI
375 On some platforms SPL location depends on hardware partition. The ROM
376 code skips the MBR sector when loading SPL from main hardware data
377 partition. This adds offset to the main U-Boot image. Set this symbol
378 to the number of skipped sectors.
380 If unsure, leave the default.
382 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
383 bool "MMC Raw mode: by partition"
385 Use a partition for loading U-Boot when using MMC/SD in raw mode.
387 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
388 hex "Partition to use to load U-Boot from"
389 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
392 Partition on the MMC to load U-Boot from when the MMC is being
395 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
396 bool "MMC raw mode: by partition type"
397 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
399 Use partition type for specifying U-Boot partition on MMC/SD in
400 raw mode. U-Boot will be loaded from the first partition of this
403 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
404 hex "Partition Type on the MMC to load U-Boot from"
405 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
407 Partition Type on the MMC to load U-Boot from, when the MMC is being
410 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
411 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
412 depends on SUPPORT_EMMC_BOOT
414 eMMC boot partition is normally configured by the bits of the EXT_CSD
415 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
416 cases it might be required in SPL to load the image from different
417 partition than the partition selected by EXT_CSC_PART_CONFIG register.
418 Enable this option if you intend to use an eMMC boot partition other
419 then selected via EXT_CSC_PART_CONFIG register and specify the custom
420 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
423 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
424 int "Number of the eMMC boot partition to use"
425 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
428 eMMC boot partition number to use when the eMMC in raw mode and
429 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
430 by user defined partition number.
434 default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
435 default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
437 Enable this to support CRC32 in uImages or FIT images within SPL.
438 This is a 32-bit checksum value that can be used to verify images.
439 For FIT images, this is the least secure type of checksum, suitable
440 for detected accidental image corruption. For secure applications you
441 should consider SHA1 or SHA256.
447 Enable this to support MD5 in FIT images within SPL. An MD5
448 checksum is a 128-bit hash value used to check that the image
449 contents have not been corrupted. Note that MD5 is not considered
450 secure as it is possible (with a brute-force attack) to adjust the
451 image while still retaining the same MD5 hash value. For secure
452 applications where images may be changed maliciously, you should
453 consider SHA256 or SHA384.
455 config SPL_FIT_IMAGE_TINY
456 bool "Remove functionality from SPL FIT loading to reduce size"
458 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
459 default y if ARCH_IMX8M
461 Enable this to reduce the size of the FIT image loading code
462 in SPL, if space for the SPL binary is very tight.
464 This skips the recording of each loaded payload
465 (i.e. loadable) into the FDT (modifying the loaded FDT to
466 ensure this information is available to the next image
470 bool "Support CACHE drivers"
472 Enable CACHE drivers in SPL. These drivers can keep data so that
473 future requests for that data can be served faster. Enable this option
474 to build the drivers in drivers/cache as part of an SPL build.
477 bool "Support CPU drivers"
479 Enable this to support CPU drivers in SPL. These drivers can set
480 up CPUs and provide information about them such as the model and
481 name. This can be useful in SPL since setting up the CPUs earlier
482 may improve boot performance. Enable this option to build the
483 drivers in drivers/cpu as part of an SPL build.
486 bool "Support crypto drivers"
488 Enable crypto drivers in SPL. These drivers can be used to
489 accelerate secure boot processing in secure applications. Enable
490 this option to build the drivers in drivers/crypto as part of an
494 bool "Support DMA drivers"
496 Enable DMA (direct-memory-access) drivers in SPL. These drivers
497 can be used to handle memory-to-peripheral data transfer without
498 the CPU moving the data. Enable this option to build the drivers
499 in drivers/dma as part of an SPL build.
501 config SPL_DRIVERS_MISC
502 bool "Support misc drivers"
504 Enable miscellaneous drivers in SPL. These drivers perform various
505 tasks that don't fall nicely into other categories, Enable this
506 option to build the drivers in drivers/misc as part of an SPL
507 build, for those that support building in SPL (not all drivers do).
509 config SPL_ENV_SUPPORT
510 bool "Support an environment"
512 Enable environment support in SPL. The U-Boot environment provides
513 a number of settings (essentially name/value pairs) which can
514 control many aspects of U-Boot's operation. Normally this is not
515 needed in SPL as it has a much simpler task with less
516 configuration. But some boards use this to support 'Falcon' boot
517 on EXT2 and FAT, where SPL boots directly into Linux without
518 starting U-Boot first. Enabling this option will make env_get()
519 and env_set() available in SPL.
522 bool "Support save environment"
523 depends on SPL_ENV_SUPPORT
524 select SPL_MMC_WRITE if ENV_IS_IN_MMC
526 Enable save environment support in SPL after setenv. By default
527 the saveenv option is not provided in SPL, but some boards need
528 this support in 'Falcon' boot, where SPL need to boot from
529 different images based on environment variable set by OS. For
530 example OS may set "reboot_image" environment variable to
531 "recovery" inorder to boot recovery image by SPL. The SPL read
532 "reboot_image" and act accordingly and change the reboot_image
533 to default mode using setenv and save the environment.
536 bool "Support Ethernet"
537 depends on SPL_ENV_SUPPORT
540 Enable access to the network subsystem and associated Ethernet
541 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
542 link rather than from an on-board peripheral. Environment support
543 is required since the network stack uses a number of environment
544 variables. See also SPL_NET.
547 bool "Support EXT filesystems"
549 Enable support for EXT2/3/4 filesystems with SPL. This permits
550 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
551 filesystem from within SPL. Support for the underlying block
552 device (e.g. MMC or USB) must be enabled separately.
554 config SPL_FS_SQUASHFS
555 bool "Support SquashFS filesystems"
558 Enable support for SquashFS filesystems with SPL. This permits
559 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
560 filesystem from within SPL. Support for the underlying block
561 device (e.g. MMC or USB) must be enabled separately.
564 bool "Support FAT filesystems"
567 Enable support for FAT and VFAT filesystems with SPL. This
568 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
569 filesystem from within SPL. Support for the underlying block
570 device (e.g. MMC or USB) must be enabled separately.
573 bool "Support write for FAT filesystems"
575 Enable write support for FAT and VFAT filesystems with SPL.
576 Support for the underlying block device (e.g. MMC or USB) must be
582 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
583 provide software-configurable hardware which is typically used to
584 implement peripherals (such as UARTs, LCD displays, MMC) or
585 accelerate custom processing functions, such as image processing
586 or machine learning. Sometimes it is useful to program the FPGA
587 as early as possible during boot, and this option can enable that
591 bool "Support GPIO in SPL"
593 Enable support for GPIOs (General-purpose Input/Output) in SPL.
594 GPIOs allow U-Boot to read the state of an input line (high or
595 low) and set the state of an output line. This can be used to
596 drive LEDs, control power to various system parts and read user
597 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
598 for example. Enable this option to build the drivers in
599 drivers/gpio as part of an SPL build.
604 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
605 I2C works with a clock and data line which can be driven by a
606 one or more masters or slaves. It is a fairly complex bus but is
607 widely used as it only needs two lines for communication. Speeds of
608 400kbps are typical but up to 3.4Mbps is supported by some
609 hardware. I2C can be useful in SPL to configure power management
610 ICs (PMICs) before raising the CPU clock speed, for example.
611 Enable this option to build the drivers in drivers/i2c as part of
614 config SPL_LIBCOMMON_SUPPORT
615 bool "Support common libraries"
617 Enable support for common U-Boot libraries within SPL. These
618 libraries include common code to deal with U-Boot images,
619 environment and USB, for example. This option is enabled on many
620 boards. Enable this option to build the code in common/ as part of
623 config SPL_LIBDISK_SUPPORT
624 bool "Support disk partitions"
627 Enable support for disk partitions within SPL. 'Disk' is something
628 of a misnomer as it includes non-spinning media such as flash (as
629 used in MMC and USB sticks). Partitions provide a way for a disk
630 to be split up into separate regions, with a partition table placed
631 at the start or end which describes the location and size of each
632 'partition'. These partitions are typically uses as individual block
633 devices, typically with an EXT2 or FAT filesystem in each. This
634 option enables whatever partition support has been enabled in
635 U-Boot to also be used in SPL. It brings in the code in disk/.
637 config SPL_LIBGENERIC_SUPPORT
638 bool "Support generic libraries"
640 Enable support for generic U-Boot libraries within SPL. These
641 libraries include generic code to deal with device tree, hashing,
642 printf(), compression and the like. This option is enabled on many
643 boards. Enable this option to build the code in lib/ as part of an
646 config SPL_DM_MAILBOX
647 bool "Support Mailbox"
649 Enable support for Mailbox within SPL. This enable the inter
650 processor communication protocols tobe used within SPL. Enable
651 this option to build the drivers in drivers/mailbox as part of
657 select HAVE_BLOCK_DEVICE
659 Enable support for MMC (Multimedia Card) within SPL. This enables
660 the MMC protocol implementation and allows any enabled drivers to
661 be used within SPL. MMC can be used with or without disk partition
662 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
663 this option to build the drivers in drivers/mmc as part of an SPL
666 config SYS_MMCSD_FS_BOOT_PARTITION
667 int "MMC Boot Partition"
670 Partition on the MMC to load U-Boot from when the MMC is being
674 bool "Tiny MMC framework in SPL"
677 Enable MMC framework tinification support. This option is useful if
678 if your SPL is extremely size constrained. Heed the warning, enable
679 this option if and only if you know exactly what you are doing, if
680 you are reading this help text, you most likely have no idea :-)
682 The MMC framework is reduced to bare minimum to be useful. No malloc
683 support is needed for the MMC framework operation with this option
684 enabled. The framework supports exactly one MMC device and exactly
685 one MMC driver. The MMC driver can be adjusted to avoid any malloc
686 operations too, which can remove the need for malloc support in SPL
687 and thus further reduce footprint.
690 bool "MMC/SD/SDIO card support for write operations in SPL"
693 Enable write access to MMC and SD Cards in SPL
696 config SPL_MPC8XXX_INIT_DDR
697 bool "Support MPC8XXX DDR init"
699 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
700 random-access memory) on the MPC8XXX family within SPL. This
701 allows DRAM to be set up before loading U-Boot into that DRAM,
704 config SPL_MTD_SUPPORT
705 bool "Support MTD drivers"
707 Enable support for MTD (Memory Technology Device) within SPL. MTD
708 provides a block interface over raw NAND and can also be used with
709 SPI flash. This allows SPL to load U-Boot from supported MTD
710 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
711 to enable specific MTD drivers.
714 bool "Support new Mentor Graphics USB"
716 Enable support for Mentor Graphics USB in SPL. This is a new
717 driver used by some boards. Enable this option to build
718 the drivers in drivers/usb/musb-new as part of an SPL build. The
719 old drivers are in drivers/usb/musb.
721 config SPL_NAND_SUPPORT
722 bool "Support NAND flash"
724 Enable support for NAND (Negative AND) flash in SPL. NAND flash
725 can be used to allow SPL to load U-Boot from supported devices.
726 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
729 config SPL_NAND_DRIVERS
730 bool "Use standard NAND driver"
732 SPL uses normal NAND drivers, not minimal drivers.
735 bool "Include standard software ECC in the SPL"
737 config SPL_NAND_SIMPLE
738 bool "Support simple NAND drivers in SPL"
740 Support for NAND boot using simple NAND drivers that
741 expose the cmd_ctrl() interface.
744 depends on SPL_NAND_DRIVERS
745 bool "Use Base NAND Driver"
747 Include nand_base.c in the SPL.
749 config SPL_NAND_IDENT
750 depends on SPL_NAND_BASE
751 bool "Use chip ID to identify NAND flash"
753 SPL uses the chip ID list to identify the NAND flash.
758 Enable support for loading payloads from UBI. See
759 README.ubispl for more info.
763 bool "Support SPI DM drivers in SPL"
765 Enable support for SPI DM drivers in SPL.
767 config SPL_DM_SPI_FLASH
768 bool "Support SPI DM FLASH drivers in SPL"
770 Enable support for SPI DM flash drivers in SPL.
774 config SPL_UBI_LOAD_BY_VOLNAME
775 bool "Support loading volumes by name"
777 This enables support for loading UBI volumes by name. When this
778 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
779 configure the volume name from which to load U-Boot.
781 config SPL_UBI_MAX_VOL_LEBS
782 int "Maximum number of LEBs per volume"
785 The maximum number of logical eraseblocks which a static volume
786 to load can contain. Used for sizing the scan data structure.
788 config SPL_UBI_MAX_PEB_SIZE
789 int "Maximum PEB size"
792 The maximum physical erase block size.
794 config SPL_UBI_MAX_PEBS
795 int "Maximum number of PEBs"
798 The maximum physical erase block size. If not overridden by
799 board code, this value will be used as the actual number of PEBs.
801 config SPL_UBI_PEB_OFFSET
802 int "Offset to first UBI PEB"
805 The offset in number of PEBs from the start of flash to the first
806 PEB part of the UBI image.
808 config SPL_UBI_VID_OFFSET
809 int "Offset to VID header"
812 config SPL_UBI_LEB_START
813 int "Offset to LEB in PEB"
816 The offset in bytes to the LEB within a PEB.
818 config SPL_UBI_INFO_ADDR
819 hex "Address to place UBI scan info"
822 Address for ubispl to place the scan info. Read README.ubispl to
823 determine the required size
825 config SPL_UBI_VOL_IDS
826 int "Maximum volume id"
829 The maximum volume id which can be loaded. Used for sizing the
832 config SPL_UBI_LOAD_MONITOR_ID
833 int "id of U-Boot volume"
836 The UBI volume id from which to load U-Boot
838 config SPL_UBI_LOAD_MONITOR_VOLNAME
839 string "volume name of U-Boot volume"
840 depends on SPL_UBI_LOAD_BY_VOLNAME
842 The UBI volume name from which to load U-Boot
844 config SPL_UBI_LOAD_KERNEL_ID
845 int "id of kernel volume"
846 depends on SPL_OS_BOOT && SPL_UBI
848 The UBI volume id from which to load the kernel
850 config SPL_UBI_LOAD_ARGS_ID
851 int "id of kernel args volume"
852 depends on SPL_OS_BOOT && SPL_UBI
854 The UBI volume id from which to load the device tree
856 config UBI_SPL_SILENCE_MSG
857 bool "silence UBI SPL messages"
859 Disable messages from UBI SPL. This leaves warnings
865 bool "Support networking"
867 Enable support for network devices (such as Ethernet) in SPL.
868 This permits SPL to load U-Boot over a network link rather than
869 from an on-board peripheral. Environment support is required since
870 the network stack uses a number of environment variables. See also
874 config SPL_NET_VCI_STRING
875 string "BOOTP Vendor Class Identifier string sent by SPL"
877 As defined by RFC 2132 the vendor class identifier field can be
878 sent by the client to identify the vendor type and configuration
879 of a client. This is often used in practice to allow for the DHCP
880 server to specify different files to load depending on if the ROM,
881 SPL or U-Boot itself makes the request
884 config SPL_NO_CPU_SUPPORT
885 bool "Drop CPU code in SPL"
887 This is specific to the ARM926EJ-S CPU. It disables the standard
888 start.S start-up code, presumably so that a replacement can be
889 used on that CPU. You should not enable it unless you know what
892 config SPL_NOR_SUPPORT
893 bool "Support NOR flash"
895 Enable support for loading U-Boot from memory-mapped NOR (Negative
896 OR) flash in SPL. NOR flash is slow to write but fast to read, and
897 a memory-mapped device makes it very easy to access. Loading from
898 NOR is typically achieved with just a memcpy().
900 config SPL_XIP_SUPPORT
904 Enable support for execute in place of U-Boot or kernel image. There
905 is no need to copy image from flash to ram if flash supports execute
906 in place. Its very useful in systems having enough flash but not
907 enough ram to load the image.
909 config SPL_ONENAND_SUPPORT
910 bool "Support OneNAND flash"
912 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
913 a type of NAND flash and therefore can be used to allow SPL to
914 load U-Boot from supported devices. This enables the drivers in
915 drivers/mtd/onenand as part of an SPL build.
918 bool "Activate Falcon Mode"
919 depends on !TI_SECURE_DEVICE
921 Enable booting directly to an OS from SPL.
922 for more info read doc/README.falcon
926 hex "addr, where OS is found"
927 depends on SPL_NOR_SUPPORT
929 Specify the address, where the OS image is found, which
934 config SPL_FALCON_BOOT_MMCSD
935 bool "Enable Falcon boot from MMC or SD media"
936 depends on SPL_OS_BOOT && SPL_MMC
938 Select this if the Falcon mode OS image mode is on MMC or SD media.
940 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
941 hex "Falcon mode: Sector to load kernel uImage from MMC"
942 depends on SPL_FALCON_BOOT_MMCSD
944 When Falcon mode is used with an MMC or SD media, SPL needs to know
945 where to look for the kernel uImage. The image is expected to begin
946 at the raw MMC specified in this config.
947 Note that the Falcon mode image can also be a FIT, if FIT support is
952 default "tpl/u-boot-with-tpl.bin" if TPL
955 Payload for SPL boot. For backward compatibility, default to
956 u-boot.bin, i.e. RAW image without any header. In case of
957 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
961 bool "Support PCI drivers"
963 Enable support for PCI in SPL. For platforms that need PCI to boot,
964 or must perform some init using PCI in SPL, this provides the
965 necessary driver support. This enables the drivers in drivers/pci
966 as part of an SPL build.
969 bool "Support PCH drivers"
971 Enable support for PCH (Platform Controller Hub) devices in SPL.
972 These are used to set up GPIOs and the SPI peripheral early in
973 boot. This enables the drivers in drivers/pch as part of an SPL
976 config SPL_POST_MEM_SUPPORT
977 bool "Support POST drivers"
979 Enable support for POST (Power-on Self Test) in SPL. POST is a
980 procedure that checks that the hardware (CPU or board) appears to
981 be functionally correctly. It is a sanity check that can be
982 performed before booting. This enables the drivers in post/drivers
983 as part of an SPL build.
986 bool "Support reset drivers"
989 Enable support for reset control in SPL.
990 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
991 by using the generic reset API provided by driver model.
992 This enables the drivers in drivers/reset as part of an SPL build.
995 bool "Support power drivers"
997 Enable support for power control in SPL. This includes support
998 for PMICs (Power-management Integrated Circuits) and some of the
999 features provided by PMICs. In particular, voltage regulators can
1000 be used to enable/disable power and vary its voltage. That can be
1001 useful in SPL to turn on boot peripherals and adjust CPU voltage
1002 so that the clock speed can be increased. This enables the drivers
1003 in drivers/power, drivers/power/pmic and drivers/power/regulator
1004 as part of an SPL build.
1006 config SPL_POWER_DOMAIN
1007 bool "Support power domain drivers"
1010 Enable support for power domain control in SPL. Many SoCs allow
1011 power to be applied to or removed from portions of the SoC (power
1012 domains). This may be used to save power. This API provides the
1013 means to control such power management hardware. This enables
1014 the drivers in drivers/power/domain as part of a SPL build.
1016 config SPL_RAM_SUPPORT
1017 bool "Support booting from RAM"
1018 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1020 Enable booting of an image in RAM. The image can be preloaded or
1021 it can be loaded by SPL directly into RAM (e.g. using USB).
1023 config SPL_RAM_DEVICE
1024 bool "Support booting from preloaded image in RAM"
1025 depends on SPL_RAM_SUPPORT
1026 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1028 Enable booting of an image already loaded in RAM. The image has to
1029 be already in memory when SPL takes over, e.g. loaded by the boot
1032 config SPL_REMOTEPROC
1033 bool "Support REMOTEPROCS"
1035 Enable support for REMOTEPROCs in SPL. This permits to load
1036 a remote processor firmware in SPL.
1039 bool "Support RTC drivers"
1041 Enable RTC (Real-time Clock) support in SPL. This includes support
1042 for reading and setting the time. Some RTC devices also have some
1043 non-volatile (battery-backed) memory which is accessible if
1044 needed. This enables the drivers in drivers/rtc as part of an SPL
1048 bool "Support loading from SATA"
1050 Enable support for SATA (Serial AT attachment) in SPL. This allows
1051 use of SATA devices such as hard drives and flash drivers for
1052 loading U-Boot. SATA is used in higher-end embedded systems and
1053 can provide higher performance than MMC , at somewhat higher
1054 expense and power consumption. This enables loading from SATA
1055 using a configured device.
1057 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1058 bool "SATA raw mode: by sector"
1060 default y if ARCH_MVEBU
1062 Use sector number for specifying U-Boot location on SATA disk in
1065 config SPL_SATA_RAW_U_BOOT_SECTOR
1066 hex "Sector on the SATA disk to load U-Boot from"
1067 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1068 default 0x1 if ARCH_MVEBU
1070 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1071 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1074 bool "Support serial"
1078 Enable support for serial in SPL. This allows use of a serial UART
1079 for displaying messages while SPL is running. It also brings in
1080 printf() and panic() functions. This should normally be enabled
1081 unless there are space reasons not to. Even then, consider
1082 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1085 bool "Support SPI drivers"
1087 Enable support for using SPI in SPL. This is used for connecting
1088 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1089 more details on that. The SPI driver provides the transport for
1090 data between the SPI flash and the CPU. This option can be used to
1091 enable SPI drivers that are needed for other purposes also, such
1094 config SPL_SPI_FLASH_SUPPORT
1095 bool "Support SPI flash drivers"
1098 Enable support for using SPI flash in SPL, and loading U-Boot from
1099 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1100 the SPI bus that is used to connect it to a system. It is a simple
1101 but fast bidirectional 4-wire bus (clock, chip select and two data
1102 lines). This enables the drivers in drivers/mtd/spi as part of an
1103 SPL build. This normally requires SPL_SPI.
1105 if SPL_SPI_FLASH_SUPPORT
1107 config SPL_SPI_FLASH_TINY
1108 bool "Enable low footprint SPL SPI Flash support"
1109 depends on !SPI_FLASH_BAR
1110 default y if SPI_FLASH
1112 Enable lightweight SPL SPI Flash support that supports just reading
1113 data/images from flash. No support to write/erase flash. Enable
1114 this if you have SPL size limitations and don't need full
1115 fledged SPI flash support.
1117 config SPL_SPI_FLASH_SFDP_SUPPORT
1118 bool "SFDP table parsing support for SPI NOR flashes"
1119 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1121 Enable support for parsing and auto discovery of parameters for
1122 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1123 tables as per JESD216 standard in SPL.
1125 config SPL_SPI_FLASH_MTD
1126 bool "Support for SPI flash MTD drivers in SPL"
1128 Enable support for SPI flash MTD drivers in SPL.
1131 bool "Support loading from SPI flash"
1133 Enable support for loading next stage, U-Boot or otherwise, from
1134 SPI NOR in U-Boot SPL.
1136 endif # SPL_SPI_FLASH_SUPPORT
1138 config SYS_SPI_U_BOOT_OFFS
1139 hex "address of u-boot payload in SPI flash"
1140 default 0x8000 if ARCH_SUNXI
1142 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1144 Address within SPI-Flash from where the u-boot payload is fetched
1148 bool "Driver support for thermal devices"
1150 Enable support for temperature-sensing devices. Some SoCs have on-chip
1151 temperature sensors to permit warnings, speed throttling or even
1152 automatic power-off when the temperature gets too high or low. Other
1153 devices may be discrete but connected on a suitable bus.
1156 bool "Support USB host drivers"
1157 select HAVE_BLOCK_DEVICE
1159 Enable access to USB (Universal Serial Bus) host devices so that
1160 SPL can load U-Boot from a connected USB peripheral, such as a USB
1161 flash stick. While USB takes a little longer to start up than most
1162 buses, it is very flexible since many different types of storage
1163 device can be attached. This option enables the drivers in
1164 drivers/usb/host as part of an SPL build.
1166 config SPL_USB_STORAGE
1167 bool "Support loading from USB"
1168 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1170 Enable support for USB devices in SPL. This allows use of USB
1171 devices such as hard drives and flash drivers for loading U-Boot.
1172 The actual drivers are enabled separately using the normal U-Boot
1173 config options. This enables loading from USB using a configured
1176 config SPL_USB_GADGET
1177 bool "Suppport USB Gadget drivers"
1179 Enable USB Gadget API which allows to enable USB device functions
1184 config SPL_USB_ETHER
1185 bool "Support USB Ethernet drivers"
1188 Enable access to the USB network subsystem and associated
1189 drivers in SPL. This permits SPL to load U-Boot over a
1190 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1191 than from an onboard peripheral. Environment support is required
1192 since the network stack uses a number of environment variables.
1193 See also SPL_NET and SPL_ETH.
1196 bool "Support DFU (Device Firmware Upgrade)"
1198 select SPL_DFU_NO_RESET
1199 depends on SPL_RAM_SUPPORT
1201 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1202 RAM memory device support. The ROM code will load and execute
1203 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1204 selected device partition from host-pc using dfu-utils.
1205 This feature is useful to flash the binaries to factory or bare-metal
1206 boards using USB interface.
1209 bool "DFU device selection"
1214 depends on SPL_DFU && SPL_RAM_SUPPORT
1216 select RAM/DDR memory device for loading binary images
1217 (u-boot/kernel) to the selected device partition using
1218 DFU and execute the u-boot/kernel from RAM.
1222 config SPL_USB_SDP_SUPPORT
1223 bool "Support SDP (Serial Download Protocol)"
1224 depends on SPL_SERIAL
1226 Enable Serial Download Protocol (SDP) device support in SPL. This
1227 allows to download images into memory and execute (jump to) them
1228 using the same protocol as implemented by the i.MX family's boot ROM.
1230 config SPL_SDP_USB_DEV
1231 int "SDP USB controller index"
1233 depends on SPL_USB_SDP_SUPPORT
1235 Some boards have USB controller other than 0. Define this option
1236 so it can be used in compiled environment.
1240 bool "Support watchdog drivers"
1241 imply SPL_WDT if !HW_WATCHDOG
1243 Enable support for watchdog drivers in SPL. A watchdog is
1244 typically a hardware peripheral which can reset the system when it
1245 detects no activity for a while (such as a software crash). This
1246 enables the drivers in drivers/watchdog as part of an SPL build.
1248 config SPL_YMODEM_SUPPORT
1249 bool "Support loading using Ymodem"
1250 depends on SPL_SERIAL
1252 While loading from serial is slow it can be a useful backup when
1253 there is no other option. The Ymodem protocol provides a reliable
1254 means of transmitting U-Boot over a serial line for using in SPL,
1255 with a checksum to ensure correctness.
1258 bool "Support ARM Trusted Firmware"
1259 depends on ARM64 && SPL_FIT
1261 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1262 is loaded by SPL (which is considered as BL2 in ATF terminology).
1263 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1265 config SPL_ATF_LOAD_IMAGE_V2
1266 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1269 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1271 If you want to load a bl31 image from the SPL and need the new
1274 config SPL_ATF_NO_PLATFORM_PARAM
1275 bool "Pass no platform parameter"
1278 While we expect to call a pointer to a valid FDT (or NULL)
1279 as the platform parameter to an ATF, some ATF versions are
1280 not U-Boot aware and have an insufficiently robust parameter
1281 validation to gracefully reject a FDT being passed.
1283 If this option is enabled, the spl_atf os-type handler will
1284 always pass NULL for the platform parameter.
1286 If your ATF is affected, say Y.
1288 config SPL_AM33XX_ENABLE_RTC32K_OSC
1289 bool "Enable the RTC32K OSC on AM33xx based platforms"
1292 Enable access to the AM33xx RTC and select the external 32kHz clock
1295 config SPL_OPTEE_IMAGE
1296 bool "Support OP-TEE Trusted OS image in SPL"
1299 OP-TEE is an open source Trusted OS which is loaded by SPL.
1300 More detail at: https://github.com/OP-TEE/optee_os
1303 bool "Support RISC-V OpenSBI"
1304 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1306 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1307 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1308 firmware. It is loaded and started by U-Boot SPL.
1310 More details are available at https://github.com/riscv/opensbi and
1311 https://github.com/riscv/riscv-sbi-doc
1313 config SPL_OPENSBI_LOAD_ADDR
1314 hex "OpenSBI load address"
1315 depends on SPL_OPENSBI
1317 Load address of the OpenSBI binary.
1321 depends on SUPPORT_TPL
1324 If you want to build TPL as well as the normal image and SPL, say Y.
1328 config TPL_SIZE_LIMIT
1329 hex "Maximum size of TPL image"
1333 Specifies the maximum length of the U-Boot TPL image.
1334 If this value is zero, it is ignored.
1336 config TPL_BINMAN_SYMBOLS
1337 bool "Declare binman symbols in SPL"
1338 depends on SPL_FRAMEWORK && BINMAN
1341 This enables use of symbols in TPL which refer to U-Boot, enabling SPL
1342 to obtain the location of U-Boot simply by calling spl_get_image_pos()
1343 and spl_get_image_size().
1345 For this to work, you must have a U-Boot image in the binman image, so
1346 binman can update SPL with the location of it.
1348 config TPL_FRAMEWORK
1349 bool "Support TPL based upon the common SPL framework"
1350 default y if SPL_FRAMEWORK
1352 Enable the SPL framework under common/spl/ for TPL builds.
1353 This framework supports MMC, NAND and YMODEM and other methods
1354 loading of U-Boot's SPL stage. If unsure, say Y.
1357 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1358 depends on HANDOFF && TPL_BLOBLIST
1361 This option enables TPL to write handoff information. This can be
1362 used to pass information like the size of SDRAM from TPL to U-Boot
1363 proper. The information is also available to SPL if it is useful
1366 config TPL_BOARD_INIT
1367 bool "Call board-specific initialization in TPL"
1369 If this option is enabled, U-Boot will call the function
1370 spl_board_init() from board_init_r(). This function should be
1371 provided by the board.
1373 config TPL_BOOTCOUNT_LIMIT
1374 bool "Support bootcount in TPL"
1375 depends on TPL_ENV_SUPPORT
1377 If this option is enabled, the TPL will support bootcount.
1378 For example, it may be useful to choose the device to boot.
1381 string "Linker script for the TPL stage"
1383 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1384 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1386 The TPL stage will usually require a different linker-script
1387 (as it runs from a different memory region) than the regular
1388 U-Boot stage. Set this to the path of the linker-script to
1391 May be left empty to trigger the Makefile infrastructure to
1392 fall back to the linker-script used for the SPL stage.
1394 config TPL_NEEDS_SEPARATE_STACK
1395 bool "TPL needs a separate initial stack-pointer"
1398 Enable, if the TPL stage should not inherit its initial
1399 stack-pointer from the settings for the SPL stage.
1402 bool "Support power drivers"
1404 Enable support for power control in TPL. This includes support
1405 for PMICs (Power-management Integrated Circuits) and some of the
1406 features provided by PMICs. In particular, voltage regulators can
1407 be used to enable/disable power and vary its voltage. That can be
1408 useful in TPL to turn on boot peripherals and adjust CPU voltage
1409 so that the clock speed can be increased. This enables the drivers
1410 in drivers/power, drivers/power/pmic and drivers/power/regulator
1411 as part of an TPL build.
1413 config TPL_TEXT_BASE
1414 hex "Base address for the .text section of the TPL stage"
1416 The base address for the .text section of the TPL stage.
1419 int "Maximum size (in bytes) for the TPL stage"
1423 The maximum size (in bytes) of the TPL stage.
1426 hex "Address of the initial stack-pointer for the TPL stage"
1427 depends on TPL_NEEDS_SEPARATE_STACK
1429 The address of the initial stack-pointer for the TPL stage.
1430 Usually this will be the (aligned) top-of-stack.
1432 config TPL_READ_ONLY
1434 depends on TPL_OF_PLATDATA
1435 select TPL_OF_PLATDATA_NO_BIND
1436 select TPL_OF_PLATDATA_RT
1438 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1439 section of memory. This means that of-platdata must make a copy (in
1440 writeable memory) of anything it wants to modify, such as
1441 device-private data.
1443 config TPL_BOOTROM_SUPPORT
1444 bool "Support returning to the BOOTROM (from TPL)"
1446 Some platforms (e.g. the Rockchip RK3368) provide support in their
1447 ROM for loading the next boot-stage after performing basic setup
1450 Enable this option, to return to the BOOTROM through the
1451 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1452 boot device list, if not implemented for a given board)
1455 bool "Support CRC32 in TPL"
1456 default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
1458 Enable this to support CRC32 in uImages or FIT images within SPL.
1459 This is a 32-bit checksum value that can be used to verify images.
1460 For FIT images, this is the least secure type of checksum, suitable
1461 for detected accidental image corruption. For secure applications you
1462 should consider SHA1 or SHA256.
1464 config TPL_DRIVERS_MISC
1465 bool "Support misc drivers in TPL"
1467 Enable miscellaneous drivers in TPL. These drivers perform various
1468 tasks that don't fall nicely into other categories, Enable this
1469 option to build the drivers in drivers/misc as part of an TPL
1470 build, for those that support building in TPL (not all drivers do).
1472 config TPL_ENV_SUPPORT
1473 bool "Support an environment"
1475 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1478 bool "Support GPIO in TPL"
1480 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1481 GPIOs allow U-Boot to read the state of an input line (high or
1482 low) and set the state of an output line. This can be used to
1483 drive LEDs, control power to various system parts and read user
1484 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1485 for example. Enable this option to build the drivers in
1486 drivers/gpio as part of an TPL build.
1491 Enable support for the I2C bus in TPL. See SPL_I2C for
1494 config TPL_LIBCOMMON_SUPPORT
1495 bool "Support common libraries"
1497 Enable support for common U-Boot libraries within TPL. See
1498 SPL_LIBCOMMON_SUPPORT for details.
1500 config TPL_LIBGENERIC_SUPPORT
1501 bool "Support generic libraries"
1503 Enable support for generic U-Boot libraries within TPL. See
1504 SPL_LIBGENERIC_SUPPORT for details.
1506 config TPL_MPC8XXX_INIT_DDR
1507 bool "Support MPC8XXX DDR init"
1509 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1510 SPL_MPC8XXX_INIT_DDR for details.
1516 Enable support for MMC within TPL. See SPL_MMC for details.
1518 config TPL_NAND_SUPPORT
1519 bool "Support NAND flash"
1521 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1524 bool "Support PCI drivers"
1526 Enable support for PCI in TPL. For platforms that need PCI to boot,
1527 or must perform some init using PCI in SPL, this provides the
1528 necessary driver support. This enables the drivers in drivers/pci
1529 as part of a TPL build.
1532 bool "Support PCH drivers"
1534 Enable support for PCH (Platform Controller Hub) devices in TPL.
1535 These are used to set up GPIOs and the SPI peripheral early in
1536 boot. This enables the drivers in drivers/pch as part of a TPL
1539 config TPL_RAM_SUPPORT
1540 bool "Support booting from RAM"
1542 Enable booting of an image in RAM. The image can be preloaded or
1543 it can be loaded by TPL directly into RAM (e.g. using USB).
1545 config TPL_RAM_DEVICE
1546 bool "Support booting from preloaded image in RAM"
1547 depends on TPL_RAM_SUPPORT
1549 Enable booting of an image already loaded in RAM. The image has to
1550 be already in memory when TPL takes over, e.g. loaded by the boot
1554 bool "Support RTC drivers"
1556 Enable RTC (Real-time Clock) support in TPL. This includes support
1557 for reading and setting the time. Some RTC devices also have some
1558 non-volatile (battery-backed) memory which is accessible if
1559 needed. This enables the drivers in drivers/rtc as part of an TPL
1563 bool "Support serial"
1567 Enable support for serial in TPL. See SPL_SERIAL for
1570 config TPL_SPI_FLASH_SUPPORT
1571 bool "Support SPI flash drivers"
1573 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1576 config TPL_SPI_FLASH_TINY
1577 bool "Enable low footprint TPL SPI Flash support"
1578 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1579 default y if SPI_FLASH
1581 Enable lightweight TPL SPI Flash support that supports just reading
1582 data/images from flash. No support to write/erase flash. Enable
1583 this if you have TPL size limitations and don't need full-fledged
1587 bool "Support loading from SPI flash"
1588 depends on TPL_SPI_FLASH_SUPPORT
1590 Enable support for loading next stage, U-Boot or otherwise, from
1591 SPI NOR in U-Boot TPL.
1594 bool "Support SPI drivers"
1596 Enable support for using SPI in TPL. See SPL_SPI for
1600 bool "Support SPI DM drivers in TPL"
1602 Enable support for SPI DM drivers in TPL.
1604 config TPL_DM_SPI_FLASH
1605 bool "Support SPI DM FLASH drivers in TPL"
1607 Enable support for SPI DM flash drivers in TPL.
1609 config TPL_YMODEM_SUPPORT
1610 bool "Support loading using Ymodem"
1611 depends on TPL_SERIAL
1613 While loading from serial is slow it can be a useful backup when
1614 there is no other option. The Ymodem protocol provides a reliable
1615 means of transmitting U-Boot over a serial line for using in TPL,
1616 with a checksum to ensure correctness.
1620 config SPL_AT91_MCK_BYPASS
1621 bool "Use external clock signal as a source of main clock for AT91 platforms"
1622 depends on ARCH_AT91
1624 Use external 8 to 24 Mhz clock signal as source of main clock instead
1625 of an external crystal oscillator.
1626 This option disables the internal driving on the XOUT pin.
1627 The external source has to provide a stable clock on the XIN pin.
1628 If this option is disabled, the SoC expects a crystal oscillator
1629 that needs driving on both XIN and XOUT lines.