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
672 Use -1 as a special value to use the first bootable partition.
675 bool "Tiny MMC framework in SPL"
678 Enable MMC framework tinification support. This option is useful if
679 if your SPL is extremely size constrained. Heed the warning, enable
680 this option if and only if you know exactly what you are doing, if
681 you are reading this help text, you most likely have no idea :-)
683 The MMC framework is reduced to bare minimum to be useful. No malloc
684 support is needed for the MMC framework operation with this option
685 enabled. The framework supports exactly one MMC device and exactly
686 one MMC driver. The MMC driver can be adjusted to avoid any malloc
687 operations too, which can remove the need for malloc support in SPL
688 and thus further reduce footprint.
691 bool "MMC/SD/SDIO card support for write operations in SPL"
694 Enable write access to MMC and SD Cards in SPL
697 config SPL_MPC8XXX_INIT_DDR
698 bool "Support MPC8XXX DDR init"
700 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
701 random-access memory) on the MPC8XXX family within SPL. This
702 allows DRAM to be set up before loading U-Boot into that DRAM,
705 config SPL_MTD_SUPPORT
706 bool "Support MTD drivers"
708 Enable support for MTD (Memory Technology Device) within SPL. MTD
709 provides a block interface over raw NAND and can also be used with
710 SPI flash. This allows SPL to load U-Boot from supported MTD
711 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
712 to enable specific MTD drivers.
715 bool "Support new Mentor Graphics USB"
717 Enable support for Mentor Graphics USB in SPL. This is a new
718 driver used by some boards. Enable this option to build
719 the drivers in drivers/usb/musb-new as part of an SPL build. The
720 old drivers are in drivers/usb/musb.
722 config SPL_NAND_SUPPORT
723 bool "Support NAND flash"
725 Enable support for NAND (Negative AND) flash in SPL. NAND flash
726 can be used to allow SPL to load U-Boot from supported devices.
727 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
730 config SPL_NAND_DRIVERS
731 bool "Use standard NAND driver"
733 SPL uses normal NAND drivers, not minimal drivers.
736 bool "Include standard software ECC in the SPL"
738 config SPL_NAND_SIMPLE
739 bool "Support simple NAND drivers in SPL"
741 Support for NAND boot using simple NAND drivers that
742 expose the cmd_ctrl() interface.
745 depends on SPL_NAND_DRIVERS
746 bool "Use Base NAND Driver"
748 Include nand_base.c in the SPL.
750 config SPL_NAND_IDENT
751 depends on SPL_NAND_BASE
752 bool "Use chip ID to identify NAND flash"
754 SPL uses the chip ID list to identify the NAND flash.
759 Enable support for loading payloads from UBI. See
760 README.ubispl for more info.
764 bool "Support SPI DM drivers in SPL"
766 Enable support for SPI DM drivers in SPL.
768 config SPL_DM_SPI_FLASH
769 bool "Support SPI DM FLASH drivers in SPL"
771 Enable support for SPI DM flash drivers in SPL.
775 config SPL_UBI_LOAD_BY_VOLNAME
776 bool "Support loading volumes by name"
778 This enables support for loading UBI volumes by name. When this
779 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
780 configure the volume name from which to load U-Boot.
782 config SPL_UBI_MAX_VOL_LEBS
783 int "Maximum number of LEBs per volume"
786 The maximum number of logical eraseblocks which a static volume
787 to load can contain. Used for sizing the scan data structure.
789 config SPL_UBI_MAX_PEB_SIZE
790 int "Maximum PEB size"
793 The maximum physical erase block size.
795 config SPL_UBI_MAX_PEBS
796 int "Maximum number of PEBs"
799 The maximum physical erase block size. If not overridden by
800 board code, this value will be used as the actual number of PEBs.
802 config SPL_UBI_PEB_OFFSET
803 int "Offset to first UBI PEB"
806 The offset in number of PEBs from the start of flash to the first
807 PEB part of the UBI image.
809 config SPL_UBI_VID_OFFSET
810 int "Offset to VID header"
813 config SPL_UBI_LEB_START
814 int "Offset to LEB in PEB"
817 The offset in bytes to the LEB within a PEB.
819 config SPL_UBI_INFO_ADDR
820 hex "Address to place UBI scan info"
823 Address for ubispl to place the scan info. Read README.ubispl to
824 determine the required size
826 config SPL_UBI_VOL_IDS
827 int "Maximum volume id"
830 The maximum volume id which can be loaded. Used for sizing the
833 config SPL_UBI_LOAD_MONITOR_ID
834 int "id of U-Boot volume"
837 The UBI volume id from which to load U-Boot
839 config SPL_UBI_LOAD_MONITOR_VOLNAME
840 string "volume name of U-Boot volume"
841 depends on SPL_UBI_LOAD_BY_VOLNAME
843 The UBI volume name from which to load U-Boot
845 config SPL_UBI_LOAD_KERNEL_ID
846 int "id of kernel volume"
847 depends on SPL_OS_BOOT && SPL_UBI
849 The UBI volume id from which to load the kernel
851 config SPL_UBI_LOAD_ARGS_ID
852 int "id of kernel args volume"
853 depends on SPL_OS_BOOT && SPL_UBI
855 The UBI volume id from which to load the device tree
857 config UBI_SPL_SILENCE_MSG
858 bool "silence UBI SPL messages"
860 Disable messages from UBI SPL. This leaves warnings
866 bool "Support networking"
868 Enable support for network devices (such as Ethernet) in SPL.
869 This permits SPL to load U-Boot over a network link rather than
870 from an on-board peripheral. Environment support is required since
871 the network stack uses a number of environment variables. See also
875 config SPL_NET_VCI_STRING
876 string "BOOTP Vendor Class Identifier string sent by SPL"
878 As defined by RFC 2132 the vendor class identifier field can be
879 sent by the client to identify the vendor type and configuration
880 of a client. This is often used in practice to allow for the DHCP
881 server to specify different files to load depending on if the ROM,
882 SPL or U-Boot itself makes the request
885 config SPL_NO_CPU_SUPPORT
886 bool "Drop CPU code in SPL"
888 This is specific to the ARM926EJ-S CPU. It disables the standard
889 start.S start-up code, presumably so that a replacement can be
890 used on that CPU. You should not enable it unless you know what
893 config SPL_NOR_SUPPORT
894 bool "Support NOR flash"
896 Enable support for loading U-Boot from memory-mapped NOR (Negative
897 OR) flash in SPL. NOR flash is slow to write but fast to read, and
898 a memory-mapped device makes it very easy to access. Loading from
899 NOR is typically achieved with just a memcpy().
901 config SPL_XIP_SUPPORT
905 Enable support for execute in place of U-Boot or kernel image. There
906 is no need to copy image from flash to ram if flash supports execute
907 in place. Its very useful in systems having enough flash but not
908 enough ram to load the image.
910 config SPL_ONENAND_SUPPORT
911 bool "Support OneNAND flash"
913 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
914 a type of NAND flash and therefore can be used to allow SPL to
915 load U-Boot from supported devices. This enables the drivers in
916 drivers/mtd/onenand as part of an SPL build.
919 bool "Activate Falcon Mode"
920 depends on !TI_SECURE_DEVICE
922 Enable booting directly to an OS from SPL.
923 for more info read doc/README.falcon
927 hex "addr, where OS is found"
928 depends on SPL_NOR_SUPPORT
930 Specify the address, where the OS image is found, which
935 config SPL_FALCON_BOOT_MMCSD
936 bool "Enable Falcon boot from MMC or SD media"
937 depends on SPL_OS_BOOT && SPL_MMC
939 Select this if the Falcon mode OS image mode is on MMC or SD media.
941 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
942 hex "Falcon mode: Sector to load kernel uImage from MMC"
943 depends on SPL_FALCON_BOOT_MMCSD
945 When Falcon mode is used with an MMC or SD media, SPL needs to know
946 where to look for the kernel uImage. The image is expected to begin
947 at the raw MMC specified in this config.
948 Note that the Falcon mode image can also be a FIT, if FIT support is
953 default "tpl/u-boot-with-tpl.bin" if TPL
956 Payload for SPL boot. For backward compatibility, default to
957 u-boot.bin, i.e. RAW image without any header. In case of
958 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
962 bool "Support PCI drivers"
964 Enable support for PCI in SPL. For platforms that need PCI to boot,
965 or must perform some init using PCI in SPL, this provides the
966 necessary driver support. This enables the drivers in drivers/pci
967 as part of an SPL build.
970 bool "Support PCH drivers"
972 Enable support for PCH (Platform Controller Hub) devices in SPL.
973 These are used to set up GPIOs and the SPI peripheral early in
974 boot. This enables the drivers in drivers/pch as part of an SPL
977 config SPL_POST_MEM_SUPPORT
978 bool "Support POST drivers"
980 Enable support for POST (Power-on Self Test) in SPL. POST is a
981 procedure that checks that the hardware (CPU or board) appears to
982 be functionally correctly. It is a sanity check that can be
983 performed before booting. This enables the drivers in post/drivers
984 as part of an SPL build.
987 bool "Support reset drivers"
990 Enable support for reset control in SPL.
991 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
992 by using the generic reset API provided by driver model.
993 This enables the drivers in drivers/reset as part of an SPL build.
996 bool "Support power drivers"
998 Enable support for power control in SPL. This includes support
999 for PMICs (Power-management Integrated Circuits) and some of the
1000 features provided by PMICs. In particular, voltage regulators can
1001 be used to enable/disable power and vary its voltage. That can be
1002 useful in SPL to turn on boot peripherals and adjust CPU voltage
1003 so that the clock speed can be increased. This enables the drivers
1004 in drivers/power, drivers/power/pmic and drivers/power/regulator
1005 as part of an SPL build.
1007 config SPL_POWER_DOMAIN
1008 bool "Support power domain drivers"
1011 Enable support for power domain control in SPL. Many SoCs allow
1012 power to be applied to or removed from portions of the SoC (power
1013 domains). This may be used to save power. This API provides the
1014 means to control such power management hardware. This enables
1015 the drivers in drivers/power/domain as part of a SPL build.
1017 config SPL_RAM_SUPPORT
1018 bool "Support booting from RAM"
1019 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1021 Enable booting of an image in RAM. The image can be preloaded or
1022 it can be loaded by SPL directly into RAM (e.g. using USB).
1024 config SPL_RAM_DEVICE
1025 bool "Support booting from preloaded image in RAM"
1026 depends on SPL_RAM_SUPPORT
1027 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1029 Enable booting of an image already loaded in RAM. The image has to
1030 be already in memory when SPL takes over, e.g. loaded by the boot
1033 config SPL_REMOTEPROC
1034 bool "Support REMOTEPROCS"
1036 Enable support for REMOTEPROCs in SPL. This permits to load
1037 a remote processor firmware in SPL.
1040 bool "Support RTC drivers"
1042 Enable RTC (Real-time Clock) support in SPL. This includes support
1043 for reading and setting the time. Some RTC devices also have some
1044 non-volatile (battery-backed) memory which is accessible if
1045 needed. This enables the drivers in drivers/rtc as part of an SPL
1049 bool "Support loading from SATA"
1051 Enable support for SATA (Serial AT attachment) in SPL. This allows
1052 use of SATA devices such as hard drives and flash drivers for
1053 loading U-Boot. SATA is used in higher-end embedded systems and
1054 can provide higher performance than MMC , at somewhat higher
1055 expense and power consumption. This enables loading from SATA
1056 using a configured device.
1058 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1059 bool "SATA raw mode: by sector"
1061 default y if ARCH_MVEBU
1063 Use sector number for specifying U-Boot location on SATA disk in
1066 config SPL_SATA_RAW_U_BOOT_SECTOR
1067 hex "Sector on the SATA disk to load U-Boot from"
1068 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1069 default 0x1 if ARCH_MVEBU
1071 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1072 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1075 bool "Support serial"
1079 Enable support for serial in SPL. This allows use of a serial UART
1080 for displaying messages while SPL is running. It also brings in
1081 printf() and panic() functions. This should normally be enabled
1082 unless there are space reasons not to. Even then, consider
1083 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1086 bool "Support SPI drivers"
1088 Enable support for using SPI in SPL. This is used for connecting
1089 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1090 more details on that. The SPI driver provides the transport for
1091 data between the SPI flash and the CPU. This option can be used to
1092 enable SPI drivers that are needed for other purposes also, such
1095 config SPL_SPI_FLASH_SUPPORT
1096 bool "Support SPI flash drivers"
1099 Enable support for using SPI flash in SPL, and loading U-Boot from
1100 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1101 the SPI bus that is used to connect it to a system. It is a simple
1102 but fast bidirectional 4-wire bus (clock, chip select and two data
1103 lines). This enables the drivers in drivers/mtd/spi as part of an
1104 SPL build. This normally requires SPL_SPI.
1106 if SPL_SPI_FLASH_SUPPORT
1108 config SPL_SPI_FLASH_TINY
1109 bool "Enable low footprint SPL SPI Flash support"
1110 depends on !SPI_FLASH_BAR
1111 default y if SPI_FLASH
1113 Enable lightweight SPL SPI Flash support that supports just reading
1114 data/images from flash. No support to write/erase flash. Enable
1115 this if you have SPL size limitations and don't need full
1116 fledged SPI flash support.
1118 config SPL_SPI_FLASH_SFDP_SUPPORT
1119 bool "SFDP table parsing support for SPI NOR flashes"
1120 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1122 Enable support for parsing and auto discovery of parameters for
1123 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1124 tables as per JESD216 standard in SPL.
1126 config SPL_SPI_FLASH_MTD
1127 bool "Support for SPI flash MTD drivers in SPL"
1129 Enable support for SPI flash MTD drivers in SPL.
1132 bool "Support loading from SPI flash"
1134 Enable support for loading next stage, U-Boot or otherwise, from
1135 SPI NOR in U-Boot SPL.
1137 endif # SPL_SPI_FLASH_SUPPORT
1139 config SYS_SPI_U_BOOT_OFFS
1140 hex "address of u-boot payload in SPI flash"
1141 default 0x8000 if ARCH_SUNXI
1143 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1145 Address within SPI-Flash from where the u-boot payload is fetched
1149 bool "Driver support for thermal devices"
1151 Enable support for temperature-sensing devices. Some SoCs have on-chip
1152 temperature sensors to permit warnings, speed throttling or even
1153 automatic power-off when the temperature gets too high or low. Other
1154 devices may be discrete but connected on a suitable bus.
1157 bool "Support USB host drivers"
1158 select HAVE_BLOCK_DEVICE
1160 Enable access to USB (Universal Serial Bus) host devices so that
1161 SPL can load U-Boot from a connected USB peripheral, such as a USB
1162 flash stick. While USB takes a little longer to start up than most
1163 buses, it is very flexible since many different types of storage
1164 device can be attached. This option enables the drivers in
1165 drivers/usb/host as part of an SPL build.
1167 config SPL_USB_STORAGE
1168 bool "Support loading from USB"
1169 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1171 Enable support for USB devices in SPL. This allows use of USB
1172 devices such as hard drives and flash drivers for loading U-Boot.
1173 The actual drivers are enabled separately using the normal U-Boot
1174 config options. This enables loading from USB using a configured
1177 config SPL_USB_GADGET
1178 bool "Suppport USB Gadget drivers"
1180 Enable USB Gadget API which allows to enable USB device functions
1185 config SPL_USB_ETHER
1186 bool "Support USB Ethernet drivers"
1189 Enable access to the USB network subsystem and associated
1190 drivers in SPL. This permits SPL to load U-Boot over a
1191 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1192 than from an onboard peripheral. Environment support is required
1193 since the network stack uses a number of environment variables.
1194 See also SPL_NET and SPL_ETH.
1197 bool "Support DFU (Device Firmware Upgrade)"
1199 select SPL_DFU_NO_RESET
1200 depends on SPL_RAM_SUPPORT
1202 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1203 RAM memory device support. The ROM code will load and execute
1204 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1205 selected device partition from host-pc using dfu-utils.
1206 This feature is useful to flash the binaries to factory or bare-metal
1207 boards using USB interface.
1210 bool "DFU device selection"
1215 depends on SPL_DFU && SPL_RAM_SUPPORT
1217 select RAM/DDR memory device for loading binary images
1218 (u-boot/kernel) to the selected device partition using
1219 DFU and execute the u-boot/kernel from RAM.
1223 config SPL_USB_SDP_SUPPORT
1224 bool "Support SDP (Serial Download Protocol)"
1225 depends on SPL_SERIAL
1227 Enable Serial Download Protocol (SDP) device support in SPL. This
1228 allows to download images into memory and execute (jump to) them
1229 using the same protocol as implemented by the i.MX family's boot ROM.
1231 config SPL_SDP_USB_DEV
1232 int "SDP USB controller index"
1234 depends on SPL_USB_SDP_SUPPORT
1236 Some boards have USB controller other than 0. Define this option
1237 so it can be used in compiled environment.
1241 bool "Support watchdog drivers"
1242 imply SPL_WDT if !HW_WATCHDOG
1244 Enable support for watchdog drivers in SPL. A watchdog is
1245 typically a hardware peripheral which can reset the system when it
1246 detects no activity for a while (such as a software crash). This
1247 enables the drivers in drivers/watchdog as part of an SPL build.
1249 config SPL_YMODEM_SUPPORT
1250 bool "Support loading using Ymodem"
1251 depends on SPL_SERIAL
1253 While loading from serial is slow it can be a useful backup when
1254 there is no other option. The Ymodem protocol provides a reliable
1255 means of transmitting U-Boot over a serial line for using in SPL,
1256 with a checksum to ensure correctness.
1259 bool "Support ARM Trusted Firmware"
1260 depends on ARM64 && SPL_FIT
1262 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1263 is loaded by SPL (which is considered as BL2 in ATF terminology).
1264 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1266 config SPL_ATF_LOAD_IMAGE_V2
1267 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1270 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1272 If you want to load a bl31 image from the SPL and need the new
1275 config SPL_ATF_NO_PLATFORM_PARAM
1276 bool "Pass no platform parameter"
1279 While we expect to call a pointer to a valid FDT (or NULL)
1280 as the platform parameter to an ATF, some ATF versions are
1281 not U-Boot aware and have an insufficiently robust parameter
1282 validation to gracefully reject a FDT being passed.
1284 If this option is enabled, the spl_atf os-type handler will
1285 always pass NULL for the platform parameter.
1287 If your ATF is affected, say Y.
1289 config SPL_AM33XX_ENABLE_RTC32K_OSC
1290 bool "Enable the RTC32K OSC on AM33xx based platforms"
1293 Enable access to the AM33xx RTC and select the external 32kHz clock
1296 config SPL_OPTEE_IMAGE
1297 bool "Support OP-TEE Trusted OS image in SPL"
1300 OP-TEE is an open source Trusted OS which is loaded by SPL.
1301 More detail at: https://github.com/OP-TEE/optee_os
1304 bool "Support RISC-V OpenSBI"
1305 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1307 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1308 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1309 firmware. It is loaded and started by U-Boot SPL.
1311 More details are available at https://github.com/riscv/opensbi and
1312 https://github.com/riscv/riscv-sbi-doc
1314 config SPL_OPENSBI_LOAD_ADDR
1315 hex "OpenSBI load address"
1316 depends on SPL_OPENSBI
1318 Load address of the OpenSBI binary.
1322 depends on SUPPORT_TPL
1325 If you want to build TPL as well as the normal image and SPL, say Y.
1329 config TPL_SIZE_LIMIT
1330 hex "Maximum size of TPL image"
1334 Specifies the maximum length of the U-Boot TPL image.
1335 If this value is zero, it is ignored.
1337 config TPL_BINMAN_SYMBOLS
1338 bool "Declare binman symbols in TPL"
1339 depends on SPL_FRAMEWORK && BINMAN
1342 This enables use of symbols in TPL which refer to U-Boot, enabling TPL
1343 to obtain the location of U-Boot simply by calling spl_get_image_pos()
1344 and spl_get_image_size().
1346 For this to work, you must have a U-Boot image in the binman image, so
1347 binman can update TPL with the location of it.
1349 config TPL_FRAMEWORK
1350 bool "Support TPL based upon the common SPL framework"
1351 default y if SPL_FRAMEWORK
1353 Enable the SPL framework under common/spl/ for TPL builds.
1354 This framework supports MMC, NAND and YMODEM and other methods
1355 loading of U-Boot's SPL stage. If unsure, say Y.
1358 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1359 depends on HANDOFF && TPL_BLOBLIST
1362 This option enables TPL to write handoff information. This can be
1363 used to pass information like the size of SDRAM from TPL to U-Boot
1364 proper. The information is also available to SPL if it is useful
1367 config TPL_BOARD_INIT
1368 bool "Call board-specific initialization in TPL"
1370 If this option is enabled, U-Boot will call the function
1371 spl_board_init() from board_init_r(). This function should be
1372 provided by the board.
1374 config TPL_BOOTCOUNT_LIMIT
1375 bool "Support bootcount in TPL"
1376 depends on TPL_ENV_SUPPORT
1378 If this option is enabled, the TPL will support bootcount.
1379 For example, it may be useful to choose the device to boot.
1382 string "Linker script for the TPL stage"
1384 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1385 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1387 The TPL stage will usually require a different linker-script
1388 (as it runs from a different memory region) than the regular
1389 U-Boot stage. Set this to the path of the linker-script to
1392 May be left empty to trigger the Makefile infrastructure to
1393 fall back to the linker-script used for the SPL stage.
1395 config TPL_NEEDS_SEPARATE_STACK
1396 bool "TPL needs a separate initial stack-pointer"
1399 Enable, if the TPL stage should not inherit its initial
1400 stack-pointer from the settings for the SPL stage.
1403 bool "Support power drivers"
1405 Enable support for power control in TPL. This includes support
1406 for PMICs (Power-management Integrated Circuits) and some of the
1407 features provided by PMICs. In particular, voltage regulators can
1408 be used to enable/disable power and vary its voltage. That can be
1409 useful in TPL to turn on boot peripherals and adjust CPU voltage
1410 so that the clock speed can be increased. This enables the drivers
1411 in drivers/power, drivers/power/pmic and drivers/power/regulator
1412 as part of an TPL build.
1414 config TPL_TEXT_BASE
1415 hex "Base address for the .text section of the TPL stage"
1418 The base address for the .text section of the TPL stage.
1421 int "Maximum size (in bytes) for the TPL stage"
1425 The maximum size (in bytes) of the TPL stage.
1428 hex "Address of the initial stack-pointer for the TPL stage"
1429 depends on TPL_NEEDS_SEPARATE_STACK
1431 The address of the initial stack-pointer for the TPL stage.
1432 Usually this will be the (aligned) top-of-stack.
1434 config TPL_READ_ONLY
1436 depends on TPL_OF_PLATDATA
1437 select TPL_OF_PLATDATA_NO_BIND
1438 select TPL_OF_PLATDATA_RT
1440 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1441 section of memory. This means that of-platdata must make a copy (in
1442 writeable memory) of anything it wants to modify, such as
1443 device-private data.
1445 config TPL_BOOTROM_SUPPORT
1446 bool "Support returning to the BOOTROM (from TPL)"
1448 Some platforms (e.g. the Rockchip RK3368) provide support in their
1449 ROM for loading the next boot-stage after performing basic setup
1452 Enable this option, to return to the BOOTROM through the
1453 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1454 boot device list, if not implemented for a given board)
1457 bool "Support CRC32 in TPL"
1458 default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
1460 Enable this to support CRC32 in uImages or FIT images within SPL.
1461 This is a 32-bit checksum value that can be used to verify images.
1462 For FIT images, this is the least secure type of checksum, suitable
1463 for detected accidental image corruption. For secure applications you
1464 should consider SHA1 or SHA256.
1466 config TPL_DRIVERS_MISC
1467 bool "Support misc drivers in TPL"
1469 Enable miscellaneous drivers in TPL. These drivers perform various
1470 tasks that don't fall nicely into other categories, Enable this
1471 option to build the drivers in drivers/misc as part of an TPL
1472 build, for those that support building in TPL (not all drivers do).
1474 config TPL_ENV_SUPPORT
1475 bool "Support an environment"
1477 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1480 bool "Support GPIO in TPL"
1482 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1483 GPIOs allow U-Boot to read the state of an input line (high or
1484 low) and set the state of an output line. This can be used to
1485 drive LEDs, control power to various system parts and read user
1486 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1487 for example. Enable this option to build the drivers in
1488 drivers/gpio as part of an TPL build.
1493 Enable support for the I2C bus in TPL. See SPL_I2C for
1496 config TPL_LIBCOMMON_SUPPORT
1497 bool "Support common libraries"
1499 Enable support for common U-Boot libraries within TPL. See
1500 SPL_LIBCOMMON_SUPPORT for details.
1502 config TPL_LIBGENERIC_SUPPORT
1503 bool "Support generic libraries"
1505 Enable support for generic U-Boot libraries within TPL. See
1506 SPL_LIBGENERIC_SUPPORT for details.
1508 config TPL_MPC8XXX_INIT_DDR
1509 bool "Support MPC8XXX DDR init"
1511 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1512 SPL_MPC8XXX_INIT_DDR for details.
1518 Enable support for MMC within TPL. See SPL_MMC for details.
1520 config TPL_NAND_SUPPORT
1521 bool "Support NAND flash"
1523 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1526 bool "Support PCI drivers"
1528 Enable support for PCI in TPL. For platforms that need PCI to boot,
1529 or must perform some init using PCI in SPL, this provides the
1530 necessary driver support. This enables the drivers in drivers/pci
1531 as part of a TPL build.
1534 bool "Support PCH drivers"
1536 Enable support for PCH (Platform Controller Hub) devices in TPL.
1537 These are used to set up GPIOs and the SPI peripheral early in
1538 boot. This enables the drivers in drivers/pch as part of a TPL
1541 config TPL_RAM_SUPPORT
1542 bool "Support booting from RAM"
1544 Enable booting of an image in RAM. The image can be preloaded or
1545 it can be loaded by TPL directly into RAM (e.g. using USB).
1547 config TPL_RAM_DEVICE
1548 bool "Support booting from preloaded image in RAM"
1549 depends on TPL_RAM_SUPPORT
1551 Enable booting of an image already loaded in RAM. The image has to
1552 be already in memory when TPL takes over, e.g. loaded by the boot
1556 bool "Support RTC drivers"
1558 Enable RTC (Real-time Clock) support in TPL. This includes support
1559 for reading and setting the time. Some RTC devices also have some
1560 non-volatile (battery-backed) memory which is accessible if
1561 needed. This enables the drivers in drivers/rtc as part of an TPL
1565 bool "Support serial"
1569 Enable support for serial in TPL. See SPL_SERIAL for
1572 config TPL_SPI_FLASH_SUPPORT
1573 bool "Support SPI flash drivers"
1575 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1578 config TPL_SPI_FLASH_TINY
1579 bool "Enable low footprint TPL SPI Flash support"
1580 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1581 default y if SPI_FLASH
1583 Enable lightweight TPL SPI Flash support that supports just reading
1584 data/images from flash. No support to write/erase flash. Enable
1585 this if you have TPL size limitations and don't need full-fledged
1589 bool "Support loading from SPI flash"
1590 depends on TPL_SPI_FLASH_SUPPORT
1592 Enable support for loading next stage, U-Boot or otherwise, from
1593 SPI NOR in U-Boot TPL.
1596 bool "Support SPI drivers"
1598 Enable support for using SPI in TPL. See SPL_SPI for
1602 bool "Support SPI DM drivers in TPL"
1604 Enable support for SPI DM drivers in TPL.
1606 config TPL_DM_SPI_FLASH
1607 bool "Support SPI DM FLASH drivers in TPL"
1609 Enable support for SPI DM flash drivers in TPL.
1611 config TPL_YMODEM_SUPPORT
1612 bool "Support loading using Ymodem"
1613 depends on TPL_SERIAL
1615 While loading from serial is slow it can be a useful backup when
1616 there is no other option. The Ymodem protocol provides a reliable
1617 means of transmitting U-Boot over a serial line for using in TPL,
1618 with a checksum to ensure correctness.
1622 config SPL_AT91_MCK_BYPASS
1623 bool "Use external clock signal as a source of main clock for AT91 platforms"
1624 depends on ARCH_AT91
1626 Use external 8 to 24 Mhz clock signal as source of main clock instead
1627 of an external crystal oscillator.
1628 This option disables the internal driving on the XOUT pin.
1629 The external source has to provide a stable clock on the XIN pin.
1630 If this option is disabled, the SoC expects a crystal oscillator
1631 that needs driving on both XIN and XOUT lines.