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 menu "PowerPC and LayerScape SPL Boot options"
107 bool "Load SPL from NAND flash"
108 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
111 bool "Load SPL from SD Card / eMMC"
112 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
115 bool "Load SPL from SPI flash"
116 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
119 bool "Create SPL in Freescale PBI format"
120 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
123 Create boot binary having SPL binary in PBI format concatenated with
129 bool "Pass hand-off information from SPL to U-Boot proper"
130 depends on SPL && BLOBLIST
132 It is useful to be able to pass information from SPL to U-Boot
133 proper to preserve state that is known in SPL and is needed in U-Boot.
134 Enable this to locate the handoff information in U-Boot proper, early
135 in boot. It is available in gd->handoff. The state state is set up
136 in SPL (or TPL if that is being used).
141 bool "Pass hand-off information from SPL to U-Boot proper"
142 depends on HANDOFF && SPL_BLOBLIST
145 This option enables SPL to write handoff information. This can be
146 used to pass information like the size of SDRAM from SPL to U-Boot
147 proper. Also SPL can receive information from TPL in the same place
151 string "Linker script for the SPL stage"
152 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
154 The SPL stage will usually require a different linker-script
155 (as it runs from a different memory region) than the regular
156 U-Boot stage. Set this to the path of the linker-script to
161 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
162 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
163 default 0x20060 if SUN50I_GEN_H6
164 default 0x00060 if ARCH_SUNXI
165 default 0xfffc0000 if ARCH_ZYNQMP
168 The address in memory that SPL will be running from.
170 config SPL_BOARD_INIT
171 bool "Call board-specific initialization in SPL"
173 If this option is enabled, U-Boot will call the function
174 spl_board_init() from board_init_r(). This function should be
175 provided by the board.
177 config SPL_BOOTROM_SUPPORT
178 bool "Support returning to the BOOTROM"
180 Some platforms (e.g. the Rockchip RK3368) provide support in their
181 ROM for loading the next boot-stage after performing basic setup
184 Enable this option, to return to the BOOTROM through the
185 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
186 boot device list, if not implemented for a given board)
188 config SPL_BOOTCOUNT_LIMIT
189 bool "Support bootcount in SPL"
190 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
192 On some boards, which use 'falcon' mode, it is necessary to check
193 and increment the number of boot attempts. Such boards do not
194 use proper U-Boot for normal boot flow and hence needs those
195 adjustments to be done in the SPL.
197 config SPL_RAW_IMAGE_SUPPORT
198 bool "Support SPL loading and booting of RAW images"
199 default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
200 default y if !TI_SECURE_DEVICE
202 SPL will support loading and booting a RAW image when this option
203 is y. If this is not set, SPL will move on to other available
204 boot media to find a suitable image.
206 config SPL_LEGACY_IMAGE_SUPPORT
207 bool "Support SPL loading and booting of Legacy images"
208 default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
210 SPL will support loading and booting Legacy images when this option
211 is y. If this is not set, SPL will move on to other available
212 boot media to find a suitable image.
214 config SPL_LEGACY_IMAGE_CRC_CHECK
215 bool "Check CRC of Legacy images"
216 depends on SPL_LEGACY_IMAGE_SUPPORT
219 Enable this to check the CRC of Legacy images. While this increases
220 reliability, it affects both code size and boot duration.
221 If disabled, Legacy images are booted if the image magic and size
222 are correct, without further integrity checks.
224 config SPL_SYS_MALLOC_SIMPLE
226 prompt "Only use malloc_simple functions in the SPL"
228 Say Y here to only use the *_simple malloc functions from
229 malloc_simple.c, rather then using the versions from dlmalloc.c;
230 this will make the SPL binary smaller at the cost of more heap
231 usage as the *_simple malloc functions do not re-use free-ed mem.
233 config TPL_SYS_MALLOC_SIMPLE
235 prompt "Only use malloc_simple functions in the TPL"
238 Say Y here to only use the *_simple malloc functions from
239 malloc_simple.c, rather then using the versions from dlmalloc.c;
240 this will make the TPL binary smaller at the cost of more heap
241 usage as the *_simple malloc functions do not re-use free-ed mem.
244 bool "Enable SDRAM location for SPL stack"
246 SPL starts off execution in SRAM and thus typically has only a small
247 stack available. Since SPL sets up DRAM while in its board_init_f()
248 function, it is possible for the stack to move there before
249 board_init_r() is reached. This option enables a special SDRAM
250 location for the SPL stack. U-Boot SPL switches to this after
251 board_init_f() completes, and before board_init_r() starts.
253 config SPL_STACK_R_ADDR
254 depends on SPL_STACK_R
255 hex "SDRAM location for SPL stack"
256 default 0x82000000 if ARCH_OMAP2PLUS
258 Specify the address in SDRAM for the SPL stack. This will be set up
259 before board_init_r() is called.
261 config SPL_STACK_R_MALLOC_SIMPLE_LEN
262 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
263 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
266 Specify the amount of the stack to use as memory pool for
267 malloc_simple after switching the stack to DRAM. This may be set
268 to give board_init_r() a larger heap then the initial heap in
269 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
271 config SPL_SEPARATE_BSS
272 bool "BSS section is in a different memory region from text"
274 Some platforms need a large BSS region in SPL and can provide this
275 because RAM is already set up. In this case BSS can be moved to RAM.
276 This option should then be enabled so that the correct device tree
277 location is used. Normally we put the device tree at the end of BSS
278 but with this option enabled, it goes at _image_binary_end.
282 depends on SPL_OF_PLATDATA
283 # Bind cannot be supported because the udevice structs are in read-only
284 # memory so we cannot update the linked lists.
285 select SPL_OF_PLATDATA_NO_BIND
286 select SPL_OF_PLATDATA_RT
288 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
289 section of memory. This means that of-platdata must make a copy (in
290 writeable memory) of anything it wants to modify, such as
293 config SPL_BANNER_PRINT
294 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
297 If this option is enabled, SPL will print the banner with version
298 info. Disabling this option could be useful to reduce SPL boot time
299 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
301 config TPL_BANNER_PRINT
302 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
306 If this option is enabled, TPL will print the banner with version
307 info. Disabling this option could be useful to reduce TPL boot time
308 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
311 depends on ARM && !ARM64
312 bool "Allows initializing BSS early before entering board_init_f"
314 On some platform we have sufficient memory available early on to
315 allow setting up and using a basic BSS prior to entering
316 board_init_f. Activating this option will also de-activate the
317 clearing of BSS during the SPL relocation process, thus allowing
318 to carry state from board_init_f to board_init_r by way of BSS.
320 config SPL_DISPLAY_PRINT
321 bool "Display a board-specific message in SPL"
323 If this option is enabled, U-Boot will call the function
324 spl_display_print() immediately after displaying the SPL console
325 banner ("U-Boot SPL ..."). This function should be provided by
328 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
329 bool "MMC raw mode: by sector"
330 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
331 ARCH_MX6 || ARCH_MX7 || \
332 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
333 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
334 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
335 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
337 Use sector number for specifying U-Boot location on MMC/SD in
340 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
341 hex "Address on the MMC to load U-Boot from"
342 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
343 default 0x40 if ARCH_SUNXI
344 default 0x75 if ARCH_DAVINCI
345 default 0x8a if ARCH_MX6 || ARCH_MX7
346 default 0x100 if ARCH_UNIPHIER
347 default 0x0 if ARCH_MVEBU
348 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
349 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
350 OMAP54XX || AM33XX || AM43XX || ARCH_K3
351 default 0x4000 if ARCH_ROCKCHIP
352 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
354 Address on the MMC to load U-Boot from, when the MMC is being used
355 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
357 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
358 hex "U-Boot main hardware partition image offset"
359 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
360 default 0x10 if ARCH_SUNXI
363 On some platforms SPL location depends on hardware partition. The ROM
364 code skips the MBR sector when loading SPL from main hardware data
365 partition. This adds offset to the main U-Boot image. Set this symbol
366 to the number of skipped sectors.
368 If unsure, leave the default.
370 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
371 bool "MMC Raw mode: by partition"
373 Use a partition for loading U-Boot when using MMC/SD in raw mode.
375 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
376 hex "Partition to use to load U-Boot from"
377 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
380 Partition on the MMC to load U-Boot from when the MMC is being
383 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
384 bool "MMC raw mode: by partition type"
385 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
387 Use partition type for specifying U-Boot partition on MMC/SD in
388 raw mode. U-Boot will be loaded from the first partition of this
391 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
392 hex "Partition Type on the MMC to load U-Boot from"
393 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
395 Partition Type on the MMC to load U-Boot from, when the MMC is being
398 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
399 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
400 depends on SUPPORT_EMMC_BOOT
402 eMMC boot partition is normally configured by the bits of the EXT_CSD
403 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
404 cases it might be required in SPL to load the image from different
405 partition than the partition selected by EXT_CSC_PART_CONFIG register.
406 Enable this option if you intend to use an eMMC boot partition other
407 then selected via EXT_CSC_PART_CONFIG register and specify the custom
408 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
411 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
412 int "Number of the eMMC boot partition to use"
413 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
416 eMMC boot partition number to use when the eMMC in raw mode and
417 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
418 by user defined partition number.
422 default y if SPL_LEGACY_IMAGE_SUPPORT
424 Enable this to support CRC32 in uImages or FIT images within SPL.
425 This is a 32-bit checksum value that can be used to verify images.
426 For FIT images, this is the least secure type of checksum, suitable
427 for detected accidental image corruption. For secure applications you
428 should consider SHA1 or SHA256.
434 Enable this to support MD5 in FIT images within SPL. An MD5
435 checksum is a 128-bit hash value used to check that the image
436 contents have not been corrupted. Note that MD5 is not considered
437 secure as it is possible (with a brute-force attack) to adjust the
438 image while still retaining the same MD5 hash value. For secure
439 applications where images may be changed maliciously, you should
440 consider SHA256 or SHA384.
442 config SPL_FIT_IMAGE_TINY
443 bool "Remove functionality from SPL FIT loading to reduce size"
445 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
446 default y if ARCH_IMX8M
448 Enable this to reduce the size of the FIT image loading code
449 in SPL, if space for the SPL binary is very tight.
451 This skips the recording of each loaded payload
452 (i.e. loadable) into the FDT (modifying the loaded FDT to
453 ensure this information is available to the next image
456 config SPL_CACHE_SUPPORT
457 bool "Support CACHE drivers"
459 Enable CACHE drivers in SPL. These drivers can keep data so that
460 future requests for that data can be served faster. Enable this option
461 to build the drivers in drivers/cache as part of an SPL build.
464 bool "Support CPU drivers"
466 Enable this to support CPU drivers in SPL. These drivers can set
467 up CPUs and provide information about them such as the model and
468 name. This can be useful in SPL since setting up the CPUs earlier
469 may improve boot performance. Enable this option to build the
470 drivers in drivers/cpu as part of an SPL build.
473 bool "Support crypto drivers"
475 Enable crypto drivers in SPL. These drivers can be used to
476 accelerate secure boot processing in secure applications. Enable
477 this option to build the drivers in drivers/crypto as part of an
481 bool "Support DMA drivers"
483 Enable DMA (direct-memory-access) drivers in SPL. These drivers
484 can be used to handle memory-to-peripheral data transfer without
485 the CPU moving the data. Enable this option to build the drivers
486 in drivers/dma as part of an SPL build.
488 config SPL_DRIVERS_MISC
489 bool "Support misc drivers"
491 Enable miscellaneous drivers in SPL. These drivers perform various
492 tasks that don't fall nicely into other categories, Enable this
493 option to build the drivers in drivers/misc as part of an SPL
494 build, for those that support building in SPL (not all drivers do).
496 config SPL_ENV_SUPPORT
497 bool "Support an environment"
499 Enable environment support in SPL. The U-Boot environment provides
500 a number of settings (essentially name/value pairs) which can
501 control many aspects of U-Boot's operation. Normally this is not
502 needed in SPL as it has a much simpler task with less
503 configuration. But some boards use this to support 'Falcon' boot
504 on EXT2 and FAT, where SPL boots directly into Linux without
505 starting U-Boot first. Enabling this option will make env_get()
506 and env_set() available in SPL.
509 bool "Support save environment"
510 depends on SPL_ENV_SUPPORT
511 select SPL_MMC_WRITE if ENV_IS_IN_MMC
513 Enable save environment support in SPL after setenv. By default
514 the saveenv option is not provided in SPL, but some boards need
515 this support in 'Falcon' boot, where SPL need to boot from
516 different images based on environment variable set by OS. For
517 example OS may set "reboot_image" environment variable to
518 "recovery" inorder to boot recovery image by SPL. The SPL read
519 "reboot_image" and act accordingly and change the reboot_image
520 to default mode using setenv and save the environment.
523 bool "Support Ethernet"
524 depends on SPL_ENV_SUPPORT
526 Enable access to the network subsystem and associated Ethernet
527 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
528 link rather than from an on-board peripheral. Environment support
529 is required since the network stack uses a number of environment
530 variables. See also SPL_NET_SUPPORT.
533 bool "Support EXT filesystems"
535 Enable support for EXT2/3/4 filesystems with SPL. This permits
536 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
537 filesystem from within SPL. Support for the underlying block
538 device (e.g. MMC or USB) must be enabled separately.
540 config SPL_FS_SQUASHFS
541 bool "Support SquashFS filesystems"
544 Enable support for SquashFS filesystems with SPL. This permits
545 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
546 filesystem from within SPL. Support for the underlying block
547 device (e.g. MMC or USB) must be enabled separately.
550 bool "Support FAT filesystems"
553 Enable support for FAT and VFAT filesystems with SPL. This
554 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
555 filesystem from within SPL. Support for the underlying block
556 device (e.g. MMC or USB) must be enabled separately.
559 bool "Support write for FAT filesystems"
561 Enable write support for FAT and VFAT filesystems with SPL.
562 Support for the underlying block device (e.g. MMC or USB) must be
568 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
569 provide software-configurable hardware which is typically used to
570 implement peripherals (such as UARTs, LCD displays, MMC) or
571 accelerate custom processing functions, such as image processing
572 or machine learning. Sometimes it is useful to program the FPGA
573 as early as possible during boot, and this option can enable that
577 bool "Support GPIO in SPL"
579 Enable support for GPIOs (General-purpose Input/Output) in SPL.
580 GPIOs allow U-Boot to read the state of an input line (high or
581 low) and set the state of an output line. This can be used to
582 drive LEDs, control power to various system parts and read user
583 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
584 for example. Enable this option to build the drivers in
585 drivers/gpio as part of an SPL build.
590 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
591 I2C works with a clock and data line which can be driven by a
592 one or more masters or slaves. It is a fairly complex bus but is
593 widely used as it only needs two lines for communication. Speeds of
594 400kbps are typical but up to 3.4Mbps is supported by some
595 hardware. I2C can be useful in SPL to configure power management
596 ICs (PMICs) before raising the CPU clock speed, for example.
597 Enable this option to build the drivers in drivers/i2c as part of
600 config SPL_LIBCOMMON_SUPPORT
601 bool "Support common libraries"
603 Enable support for common U-Boot libraries within SPL. These
604 libraries include common code to deal with U-Boot images,
605 environment and USB, for example. This option is enabled on many
606 boards. Enable this option to build the code in common/ as part of
609 config SPL_LIBDISK_SUPPORT
610 bool "Support disk partitions"
613 Enable support for disk partitions within SPL. 'Disk' is something
614 of a misnomer as it includes non-spinning media such as flash (as
615 used in MMC and USB sticks). Partitions provide a way for a disk
616 to be split up into separate regions, with a partition table placed
617 at the start or end which describes the location and size of each
618 'partition'. These partitions are typically uses as individual block
619 devices, typically with an EXT2 or FAT filesystem in each. This
620 option enables whatever partition support has been enabled in
621 U-Boot to also be used in SPL. It brings in the code in disk/.
623 config SPL_LIBGENERIC_SUPPORT
624 bool "Support generic libraries"
626 Enable support for generic U-Boot libraries within SPL. These
627 libraries include generic code to deal with device tree, hashing,
628 printf(), compression and the like. This option is enabled on many
629 boards. Enable this option to build the code in lib/ as part of an
632 config SPL_DM_MAILBOX
633 bool "Support Mailbox"
635 Enable support for Mailbox within SPL. This enable the inter
636 processor communication protocols tobe used within SPL. Enable
637 this option to build the drivers in drivers/mailbox as part of
640 config SPL_MMC_SUPPORT
643 select HAVE_BLOCK_DEVICE
645 Enable support for MMC (Multimedia Card) within SPL. This enables
646 the MMC protocol implementation and allows any enabled drivers to
647 be used within SPL. MMC can be used with or without disk partition
648 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
649 this option to build the drivers in drivers/mmc as part of an SPL
652 config SYS_MMCSD_FS_BOOT_PARTITION
653 int "MMC Boot Partition"
656 Partition on the MMC to load U-Boot from when the MMC is being
660 bool "Tiny MMC framework in SPL"
661 depends on SPL_MMC_SUPPORT
664 Enable MMC framework tinification support. This option is useful if
665 if your SPL is extremely size constrained. Heed the warning, enable
666 this option if and only if you know exactly what you are doing, if
667 you are reading this help text, you most likely have no idea :-)
669 The MMC framework is reduced to bare minimum to be useful. No malloc
670 support is needed for the MMC framework operation with this option
671 enabled. The framework supports exactly one MMC device and exactly
672 one MMC driver. The MMC driver can be adjusted to avoid any malloc
673 operations too, which can remove the need for malloc support in SPL
674 and thus further reduce footprint.
677 bool "MMC/SD/SDIO card support for write operations in SPL"
678 depends on SPL_MMC_SUPPORT
681 Enable write access to MMC and SD Cards in SPL
684 config SPL_MPC8XXX_INIT_DDR_SUPPORT
685 bool "Support MPC8XXX DDR init"
687 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
688 random-access memory) on the MPC8XXX family within SPL. This
689 allows DRAM to be set up before loading U-Boot into that DRAM,
692 config SPL_MTD_SUPPORT
693 bool "Support MTD drivers"
695 Enable support for MTD (Memory Technology Device) within SPL. MTD
696 provides a block interface over raw NAND and can also be used with
697 SPI flash. This allows SPL to load U-Boot from supported MTD
698 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
699 to enable specific MTD drivers.
702 bool "Support new Mentor Graphics USB"
704 Enable support for Mentor Graphics USB in SPL. This is a new
705 driver used by some boards. Enable this option to build
706 the drivers in drivers/usb/musb-new as part of an SPL build. The
707 old drivers are in drivers/usb/musb.
709 config SPL_NAND_SUPPORT
710 bool "Support NAND flash"
712 Enable support for NAND (Negative AND) flash in SPL. NAND flash
713 can be used to allow SPL to load U-Boot from supported devices.
714 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
717 config SPL_NAND_DRIVERS
718 bool "Use standard NAND driver"
720 SPL uses normal NAND drivers, not minimal drivers.
723 bool "Include standard software ECC in the SPL"
725 config SPL_NAND_SIMPLE
726 bool "Support simple NAND drivers in SPL"
728 Support for NAND boot using simple NAND drivers that
729 expose the cmd_ctrl() interface.
732 depends on SPL_NAND_DRIVERS
733 bool "Use Base NAND Driver"
735 Include nand_base.c in the SPL.
737 config SPL_NAND_IDENT
738 depends on SPL_NAND_BASE
739 bool "Use chip ID to identify NAND flash"
741 SPL uses the chip ID list to identify the NAND flash.
746 Enable support for loading payloads from UBI. See
747 README.ubispl for more info.
752 bool "Support cache drivers in SPL"
754 Enable support for cache drivers in SPL.
757 bool "Support SPI DM drivers in SPL"
759 Enable support for SPI DM drivers in SPL.
761 config SPL_DM_SPI_FLASH
762 bool "Support SPI DM FLASH drivers in SPL"
764 Enable support for SPI DM flash drivers in SPL.
768 config SPL_UBI_LOAD_BY_VOLNAME
769 bool "Support loading volumes by name"
771 This enables support for loading UBI volumes by name. When this
772 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
773 configure the volume name from which to load U-Boot.
775 config SPL_UBI_MAX_VOL_LEBS
776 int "Maximum number of LEBs per volume"
779 The maximum number of logical eraseblocks which a static volume
780 to load can contain. Used for sizing the scan data structure.
782 config SPL_UBI_MAX_PEB_SIZE
783 int "Maximum PEB size"
786 The maximum physical erase block size.
788 config SPL_UBI_MAX_PEBS
789 int "Maximum number of PEBs"
792 The maximum physical erase block size. If not overridden by
793 board code, this value will be used as the actual number of PEBs.
795 config SPL_UBI_PEB_OFFSET
796 int "Offset to first UBI PEB"
799 The offset in number of PEBs from the start of flash to the first
800 PEB part of the UBI image.
802 config SPL_UBI_VID_OFFSET
803 int "Offset to VID header"
806 config SPL_UBI_LEB_START
807 int "Offset to LEB in PEB"
810 The offset in bytes to the LEB within a PEB.
812 config SPL_UBI_INFO_ADDR
813 hex "Address to place UBI scan info"
816 Address for ubispl to place the scan info. Read README.ubispl to
817 determine the required size
819 config SPL_UBI_VOL_IDS
820 int "Maximum volume id"
823 The maximum volume id which can be loaded. Used for sizing the
826 config SPL_UBI_LOAD_MONITOR_ID
827 int "id of U-Boot volume"
830 The UBI volume id from which to load U-Boot
832 config SPL_UBI_LOAD_MONITOR_VOLNAME
833 string "volume name of U-Boot volume"
834 depends on SPL_UBI_LOAD_BY_VOLNAME
836 The UBI volume name from which to load U-Boot
838 config SPL_UBI_LOAD_KERNEL_ID
839 int "id of kernel volume"
840 depends on SPL_OS_BOOT && SPL_UBI
842 The UBI volume id from which to load the kernel
844 config SPL_UBI_LOAD_ARGS_ID
845 int "id of kernel args volume"
846 depends on SPL_OS_BOOT && SPL_UBI
848 The UBI volume id from which to load the device tree
850 config UBI_SPL_SILENCE_MSG
851 bool "silence UBI SPL messages"
854 Disable messages from UBI SPL. This leaves warnings
859 config SPL_NET_SUPPORT
860 bool "Support networking"
862 Enable support for network devices (such as Ethernet) in SPL.
863 This permits SPL to load U-Boot over a network link rather than
864 from an on-board peripheral. Environment support is required since
865 the network stack uses a number of environment variables. See also
869 config SPL_NET_VCI_STRING
870 string "BOOTP Vendor Class Identifier string sent by SPL"
872 As defined by RFC 2132 the vendor class identifier field can be
873 sent by the client to identify the vendor type and configuration
874 of a client. This is often used in practice to allow for the DHCP
875 server to specify different files to load depending on if the ROM,
876 SPL or U-Boot itself makes the request
877 endif # if SPL_NET_SUPPORT
879 config SPL_NO_CPU_SUPPORT
880 bool "Drop CPU code in SPL"
882 This is specific to the ARM926EJ-S CPU. It disables the standard
883 start.S start-up code, presumably so that a replacement can be
884 used on that CPU. You should not enable it unless you know what
887 config SPL_NOR_SUPPORT
888 bool "Support NOR flash"
890 Enable support for loading U-Boot from memory-mapped NOR (Negative
891 OR) flash in SPL. NOR flash is slow to write but fast to read, and
892 a memory-mapped device makes it very easy to access. Loading from
893 NOR is typically achieved with just a memcpy().
895 config SPL_XIP_SUPPORT
899 Enable support for execute in place of U-Boot or kernel image. There
900 is no need to copy image from flash to ram if flash supports execute
901 in place. Its very useful in systems having enough flash but not
902 enough ram to load the image.
904 config SPL_ONENAND_SUPPORT
905 bool "Support OneNAND flash"
907 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
908 a type of NAND flash and therefore can be used to allow SPL to
909 load U-Boot from supported devices. This enables the drivers in
910 drivers/mtd/onenand as part of an SPL build.
913 bool "Activate Falcon Mode"
914 depends on !TI_SECURE_DEVICE
917 Enable booting directly to an OS from SPL.
918 for more info read doc/README.falcon
922 hex "addr, where OS is found"
923 depends on SPL_NOR_SUPPORT
925 Specify the address, where the OS image is found, which
932 default "tpl/u-boot-with-tpl.bin" if TPL
935 Payload for SPL boot. For backward compatibility, default to
936 u-boot.bin, i.e. RAW image without any header. In case of
937 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
941 bool "Support PCI drivers"
943 Enable support for PCI in SPL. For platforms that need PCI to boot,
944 or must perform some init using PCI in SPL, this provides the
945 necessary driver support. This enables the drivers in drivers/pci
946 as part of an SPL build.
948 config SPL_PCH_SUPPORT
949 bool "Support PCH drivers"
951 Enable support for PCH (Platform Controller Hub) devices in SPL.
952 These are used to set up GPIOs and the SPI peripheral early in
953 boot. This enables the drivers in drivers/pch as part of an SPL
956 config SPL_POST_MEM_SUPPORT
957 bool "Support POST drivers"
959 Enable support for POST (Power-on Self Test) in SPL. POST is a
960 procedure that checks that the hardware (CPU or board) appears to
961 be functionally correctly. It is a sanity check that can be
962 performed before booting. This enables the drivers in post/drivers
963 as part of an SPL build.
966 bool "Support reset drivers"
969 Enable support for reset control in SPL.
970 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
971 by using the generic reset API provided by driver model.
972 This enables the drivers in drivers/reset as part of an SPL build.
975 bool "Support power drivers"
977 Enable support for power control in SPL. This includes support
978 for PMICs (Power-management Integrated Circuits) and some of the
979 features provided by PMICs. In particular, voltage regulators can
980 be used to enable/disable power and vary its voltage. That can be
981 useful in SPL to turn on boot peripherals and adjust CPU voltage
982 so that the clock speed can be increased. This enables the drivers
983 in drivers/power, drivers/power/pmic and drivers/power/regulator
984 as part of an SPL build.
986 config SPL_POWER_DOMAIN
987 bool "Support power domain drivers"
989 Enable support for power domain control in SPL. Many SoCs allow
990 power to be applied to or removed from portions of the SoC (power
991 domains). This may be used to save power. This API provides the
992 means to control such power management hardware. This enables
993 the drivers in drivers/power/domain as part of a SPL build.
995 config SPL_RAM_SUPPORT
996 bool "Support booting from RAM"
997 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
999 Enable booting of an image in RAM. The image can be preloaded or
1000 it can be loaded by SPL directly into RAM (e.g. using USB).
1002 config SPL_RAM_DEVICE
1003 bool "Support booting from preloaded image in RAM"
1004 depends on SPL_RAM_SUPPORT
1005 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1007 Enable booting of an image already loaded in RAM. The image has to
1008 be already in memory when SPL takes over, e.g. loaded by the boot
1011 config SPL_REMOTEPROC
1012 bool "Support REMOTEPROCS"
1014 Enable support for REMOTEPROCs in SPL. This permits to load
1015 a remote processor firmware in SPL.
1017 config SPL_RTC_SUPPORT
1018 bool "Support RTC drivers"
1020 Enable RTC (Real-time Clock) support in SPL. This includes support
1021 for reading and setting the time. Some RTC devices also have some
1022 non-volatile (battery-backed) memory which is accessible if
1023 needed. This enables the drivers in drivers/rtc as part of an SPL
1026 config SPL_SATA_SUPPORT
1027 bool "Support loading from SATA"
1029 Enable support for SATA (Serial AT attachment) in SPL. This allows
1030 use of SATA devices such as hard drives and flash drivers for
1031 loading U-Boot. SATA is used in higher-end embedded systems and
1032 can provide higher performance than MMC , at somewhat higher
1033 expense and power consumption. This enables loading from SATA
1034 using a configured device.
1036 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1037 bool "SATA raw mode: by sector"
1038 depends on SPL_SATA_SUPPORT
1039 default y if ARCH_MVEBU
1041 Use sector number for specifying U-Boot location on SATA disk in
1044 config SPL_SATA_RAW_U_BOOT_SECTOR
1045 hex "Sector on the SATA disk to load U-Boot from"
1046 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1047 default 0x1 if ARCH_MVEBU
1049 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1050 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1052 config SPL_SERIAL_SUPPORT
1053 bool "Support serial"
1057 Enable support for serial in SPL. This allows use of a serial UART
1058 for displaying messages while SPL is running. It also brings in
1059 printf() and panic() functions. This should normally be enabled
1060 unless there are space reasons not to. Even then, consider
1061 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1063 config SPL_SPI_SUPPORT
1064 bool "Support SPI drivers"
1066 Enable support for using SPI in SPL. This is used for connecting
1067 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1068 more details on that. The SPI driver provides the transport for
1069 data between the SPI flash and the CPU. This option can be used to
1070 enable SPI drivers that are needed for other purposes also, such
1073 config SPL_SPI_FLASH_SUPPORT
1074 bool "Support SPI flash drivers"
1075 depends on SPL_SPI_SUPPORT
1077 Enable support for using SPI flash in SPL, and loading U-Boot from
1078 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1079 the SPI bus that is used to connect it to a system. It is a simple
1080 but fast bidirectional 4-wire bus (clock, chip select and two data
1081 lines). This enables the drivers in drivers/mtd/spi as part of an
1082 SPL build. This normally requires SPL_SPI_SUPPORT.
1084 if SPL_SPI_FLASH_SUPPORT
1086 config SPL_SPI_FLASH_TINY
1087 bool "Enable low footprint SPL SPI Flash support"
1088 depends on !SPI_FLASH_BAR
1089 default y if SPI_FLASH
1091 Enable lightweight SPL SPI Flash support that supports just reading
1092 data/images from flash. No support to write/erase flash. Enable
1093 this if you have SPL size limitations and don't need full
1094 fledged SPI flash support.
1096 config SPL_SPI_FLASH_SFDP_SUPPORT
1097 bool "SFDP table parsing support for SPI NOR flashes"
1098 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1100 Enable support for parsing and auto discovery of parameters for
1101 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1102 tables as per JESD216 standard in SPL.
1104 config SPL_SPI_FLASH_MTD
1105 bool "Support for SPI flash MTD drivers in SPL"
1107 Enable support for SPI flash MTD drivers in SPL.
1110 bool "Support loading from SPI flash"
1112 Enable support for loading next stage, U-Boot or otherwise, from
1113 SPI NOR in U-Boot SPL.
1115 endif # SPL_SPI_FLASH_SUPPORT
1117 config SYS_SPI_U_BOOT_OFFS
1118 hex "address of u-boot payload in SPI flash"
1119 default 0x8000 if ARCH_SUNXI
1121 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1123 Address within SPI-Flash from where the u-boot payload is fetched
1127 bool "Driver support for thermal devices"
1129 Enable support for temperature-sensing devices. Some SoCs have on-chip
1130 temperature sensors to permit warnings, speed throttling or even
1131 automatic power-off when the temperature gets too high or low. Other
1132 devices may be discrete but connected on a suitable bus.
1135 bool "Support USB host drivers"
1136 select HAVE_BLOCK_DEVICE
1138 Enable access to USB (Universal Serial Bus) host devices so that
1139 SPL can load U-Boot from a connected USB peripheral, such as a USB
1140 flash stick. While USB takes a little longer to start up than most
1141 buses, it is very flexible since many different types of storage
1142 device can be attached. This option enables the drivers in
1143 drivers/usb/host as part of an SPL build.
1145 config SPL_USB_STORAGE
1146 bool "Support loading from USB"
1147 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1149 Enable support for USB devices in SPL. This allows use of USB
1150 devices such as hard drives and flash drivers for loading U-Boot.
1151 The actual drivers are enabled separately using the normal U-Boot
1152 config options. This enables loading from USB using a configured
1155 config SPL_USB_GADGET
1156 bool "Suppport USB Gadget drivers"
1158 Enable USB Gadget API which allows to enable USB device functions
1163 config SPL_USB_ETHER
1164 bool "Support USB Ethernet drivers"
1166 Enable access to the USB network subsystem and associated
1167 drivers in SPL. This permits SPL to load U-Boot over a
1168 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1169 than from an onboard peripheral. Environment support is required
1170 since the network stack uses a number of environment variables.
1171 See also SPL_NET_SUPPORT and SPL_ETH.
1174 bool "Support DFU (Device Firmware Upgrade)"
1176 select SPL_DFU_NO_RESET
1177 depends on SPL_RAM_SUPPORT
1179 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1180 RAM memory device support. The ROM code will load and execute
1181 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1182 selected device partition from host-pc using dfu-utils.
1183 This feature is useful to flash the binaries to factory or bare-metal
1184 boards using USB interface.
1187 bool "DFU device selection"
1192 depends on SPL_DFU && SPL_RAM_SUPPORT
1194 select RAM/DDR memory device for loading binary images
1195 (u-boot/kernel) to the selected device partition using
1196 DFU and execute the u-boot/kernel from RAM.
1200 config SPL_USB_SDP_SUPPORT
1201 bool "Support SDP (Serial Download Protocol)"
1202 depends on SPL_SERIAL_SUPPORT
1204 Enable Serial Download Protocol (SDP) device support in SPL. This
1205 allows to download images into memory and execute (jump to) them
1206 using the same protocol as implemented by the i.MX family's boot ROM.
1208 config SPL_SDP_USB_DEV
1209 int "SDP USB controller index"
1211 depends on SPL_USB_SDP_SUPPORT
1213 Some boards have USB controller other than 0. Define this option
1214 so it can be used in compiled environment.
1218 bool "Support watchdog drivers"
1219 imply SPL_WDT if !HW_WATCHDOG
1221 Enable support for watchdog drivers in SPL. A watchdog is
1222 typically a hardware peripheral which can reset the system when it
1223 detects no activity for a while (such as a software crash). This
1224 enables the drivers in drivers/watchdog as part of an SPL build.
1226 config SPL_YMODEM_SUPPORT
1227 bool "Support loading using Ymodem"
1228 depends on SPL_SERIAL_SUPPORT
1230 While loading from serial is slow it can be a useful backup when
1231 there is no other option. The Ymodem protocol provides a reliable
1232 means of transmitting U-Boot over a serial line for using in SPL,
1233 with a checksum to ensure correctness.
1236 bool "Support ARM Trusted Firmware"
1237 depends on ARM64 && SPL_FIT
1239 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1240 is loaded by SPL (which is considered as BL2 in ATF terminology).
1241 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1243 config SPL_ATF_LOAD_IMAGE_V2
1244 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1247 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1249 If you want to load a bl31 image from the SPL and need the new
1252 config SPL_ATF_NO_PLATFORM_PARAM
1253 bool "Pass no platform parameter"
1256 While we expect to call a pointer to a valid FDT (or NULL)
1257 as the platform parameter to an ATF, some ATF versions are
1258 not U-Boot aware and have an insufficiently robust parameter
1259 validation to gracefully reject a FDT being passed.
1261 If this option is enabled, the spl_atf os-type handler will
1262 always pass NULL for the platform parameter.
1264 If your ATF is affected, say Y.
1266 config SPL_AM33XX_ENABLE_RTC32K_OSC
1267 bool "Enable the RTC32K OSC on AM33xx based platforms"
1270 Enable access to the AM33xx RTC and select the external 32kHz clock
1274 bool "Support OP-TEE Trusted OS"
1277 OP-TEE is an open source Trusted OS which is loaded by SPL.
1278 More detail at: https://github.com/OP-TEE/optee_os
1281 bool "Support RISC-V OpenSBI"
1282 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1284 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1285 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1286 firmware. It is loaded and started by U-Boot SPL.
1288 More details are available at https://github.com/riscv/opensbi and
1289 https://github.com/riscv/riscv-sbi-doc
1291 config SPL_OPENSBI_LOAD_ADDR
1292 hex "OpenSBI load address"
1293 depends on SPL_OPENSBI
1295 Load address of the OpenSBI binary.
1299 depends on SUPPORT_TPL
1302 If you want to build TPL as well as the normal image and SPL, say Y.
1306 config TPL_SIZE_LIMIT
1307 hex "Maximum size of TPL image"
1311 Specifies the maximum length of the U-Boot TPL image.
1312 If this value is zero, it is ignored.
1314 config TPL_FRAMEWORK
1315 bool "Support TPL based upon the common SPL framework"
1316 default y if SPL_FRAMEWORK
1318 Enable the SPL framework under common/spl/ for TPL builds.
1319 This framework supports MMC, NAND and YMODEM and other methods
1320 loading of U-Boot's SPL stage. If unsure, say Y.
1323 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1324 depends on HANDOFF && TPL_BLOBLIST
1327 This option enables TPL to write handoff information. This can be
1328 used to pass information like the size of SDRAM from TPL to U-Boot
1329 proper. The information is also available to SPL if it is useful
1332 config TPL_BOARD_INIT
1333 bool "Call board-specific initialization in TPL"
1335 If this option is enabled, U-Boot will call the function
1336 spl_board_init() from board_init_r(). This function should be
1337 provided by the board.
1339 config TPL_BOOTCOUNT_LIMIT
1340 bool "Support bootcount in TPL"
1341 depends on TPL_ENV_SUPPORT
1343 If this option is enabled, the TPL will support bootcount.
1344 For example, it may be useful to choose the device to boot.
1347 string "Linker script for the TPL stage"
1349 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1350 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1352 The TPL stage will usually require a different linker-script
1353 (as it runs from a different memory region) than the regular
1354 U-Boot stage. Set this to the path of the linker-script to
1357 May be left empty to trigger the Makefile infrastructure to
1358 fall back to the linker-script used for the SPL stage.
1360 config TPL_NEEDS_SEPARATE_TEXT_BASE
1361 bool "TPL needs a separate text-base"
1365 Enable, if the TPL stage should not inherit its text-base
1366 from the SPL stage. When enabled, a base address for the
1367 .text sections of the TPL stage has to be set below.
1369 config TPL_NEEDS_SEPARATE_STACK
1370 bool "TPL needs a separate initial stack-pointer"
1374 Enable, if the TPL stage should not inherit its initial
1375 stack-pointer from the settings for the SPL stage.
1377 config TPL_TEXT_BASE
1378 hex "Base address for the .text section of the TPL stage"
1379 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1381 The base address for the .text section of the TPL stage.
1384 int "Maximum size (in bytes) for the TPL stage"
1388 The maximum size (in bytes) of the TPL stage.
1391 hex "Address of the initial stack-pointer for the TPL stage"
1392 depends on TPL_NEEDS_SEPARATE_STACK
1394 The address of the initial stack-pointer for the TPL stage.
1395 Usually this will be the (aligned) top-of-stack.
1397 config TPL_READ_ONLY
1399 depends on TPL_OF_PLATDATA
1400 select TPL_OF_PLATDATA_NO_BIND
1401 select TPL_OF_PLATDATA_RT
1403 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1404 section of memory. This means that of-platdata must make a copy (in
1405 writeable memory) of anything it wants to modify, such as
1406 device-private data.
1408 config TPL_BOOTROM_SUPPORT
1409 bool "Support returning to the BOOTROM (from TPL)"
1411 Some platforms (e.g. the Rockchip RK3368) provide support in their
1412 ROM for loading the next boot-stage after performing basic setup
1415 Enable this option, to return to the BOOTROM through the
1416 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1417 boot device list, if not implemented for a given board)
1419 config TPL_DRIVERS_MISC
1420 bool "Support misc drivers in TPL"
1422 Enable miscellaneous drivers in TPL. These drivers perform various
1423 tasks that don't fall nicely into other categories, Enable this
1424 option to build the drivers in drivers/misc as part of an TPL
1425 build, for those that support building in TPL (not all drivers do).
1427 config TPL_ENV_SUPPORT
1428 bool "Support an environment"
1430 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1433 bool "Support GPIO in TPL"
1435 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1436 GPIOs allow U-Boot to read the state of an input line (high or
1437 low) and set the state of an output line. This can be used to
1438 drive LEDs, control power to various system parts and read user
1439 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1440 for example. Enable this option to build the drivers in
1441 drivers/gpio as part of an TPL build.
1446 Enable support for the I2C bus in TPL. See SPL_I2C for
1449 config TPL_LIBCOMMON_SUPPORT
1450 bool "Support common libraries"
1452 Enable support for common U-Boot libraries within TPL. See
1453 SPL_LIBCOMMON_SUPPORT for details.
1455 config TPL_LIBGENERIC_SUPPORT
1456 bool "Support generic libraries"
1458 Enable support for generic U-Boot libraries within TPL. See
1459 SPL_LIBGENERIC_SUPPORT for details.
1461 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1462 bool "Support MPC8XXX DDR init"
1464 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1465 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1467 config TPL_MMC_SUPPORT
1471 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1473 config TPL_NAND_SUPPORT
1474 bool "Support NAND flash"
1476 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1479 bool "Support PCI drivers"
1481 Enable support for PCI in TPL. For platforms that need PCI to boot,
1482 or must perform some init using PCI in SPL, this provides the
1483 necessary driver support. This enables the drivers in drivers/pci
1484 as part of a TPL build.
1486 config TPL_PCH_SUPPORT
1487 bool "Support PCH drivers"
1489 Enable support for PCH (Platform Controller Hub) devices in TPL.
1490 These are used to set up GPIOs and the SPI peripheral early in
1491 boot. This enables the drivers in drivers/pch as part of a TPL
1494 config TPL_RAM_SUPPORT
1495 bool "Support booting from RAM"
1497 Enable booting of an image in RAM. The image can be preloaded or
1498 it can be loaded by TPL directly into RAM (e.g. using USB).
1500 config TPL_RAM_DEVICE
1501 bool "Support booting from preloaded image in RAM"
1502 depends on TPL_RAM_SUPPORT
1504 Enable booting of an image already loaded in RAM. The image has to
1505 be already in memory when TPL takes over, e.g. loaded by the boot
1508 config TPL_RTC_SUPPORT
1509 bool "Support RTC drivers"
1511 Enable RTC (Real-time Clock) support in TPL. This includes support
1512 for reading and setting the time. Some RTC devices also have some
1513 non-volatile (battery-backed) memory which is accessible if
1514 needed. This enables the drivers in drivers/rtc as part of an TPL
1517 config TPL_SERIAL_SUPPORT
1518 bool "Support serial"
1522 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1525 config TPL_SPI_FLASH_SUPPORT
1526 bool "Support SPI flash drivers"
1528 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1531 config TPL_SPI_FLASH_TINY
1532 bool "Enable low footprint TPL SPI Flash support"
1533 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1534 default y if SPI_FLASH
1536 Enable lightweight TPL SPI Flash support that supports just reading
1537 data/images from flash. No support to write/erase flash. Enable
1538 this if you have TPL size limitations and don't need full-fledged
1542 bool "Support loading from SPI flash"
1543 depends on TPL_SPI_FLASH_SUPPORT
1545 Enable support for loading next stage, U-Boot or otherwise, from
1546 SPI NOR in U-Boot TPL.
1548 config TPL_SPI_SUPPORT
1549 bool "Support SPI drivers"
1551 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1555 bool "Support SPI DM drivers in TPL"
1557 Enable support for SPI DM drivers in TPL.
1559 config TPL_DM_SPI_FLASH
1560 bool "Support SPI DM FLASH drivers in TPL"
1562 Enable support for SPI DM flash drivers in TPL.
1564 config TPL_YMODEM_SUPPORT
1565 bool "Support loading using Ymodem"
1566 depends on TPL_SERIAL_SUPPORT
1568 While loading from serial is slow it can be a useful backup when
1569 there is no other option. The Ymodem protocol provides a reliable
1570 means of transmitting U-Boot over a serial line for using in TPL,
1571 with a checksum to ensure correctness.
1575 config SPL_AT91_MCK_BYPASS
1576 bool "Use external clock signal as a source of main clock for AT91 platforms"
1577 depends on ARCH_AT91
1580 Use external 8 to 24 Mhz clock signal as source of main clock instead
1581 of an external crystal oscillator.
1582 This option disables the internal driving on the XOUT pin.
1583 The external source has to provide a stable clock on the XIN pin.
1584 If this option is disabled, the SoC expects a crystal oscillator
1585 that needs driving on both XIN and XOUT lines.