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 69632 if ARCH_MX6 && !MX6_OCRAM_256KB
41 default 200704 if ARCH_MX6 && MX6_OCRAM_256KB
44 Specifies the maximum length of the U-Boot SPL image.
45 If this value is zero, it is ignored.
47 config SPL_SIZE_LIMIT_SUBTRACT_GD
48 bool "SPL image size check: provide space for global data"
49 depends on SPL_SIZE_LIMIT > 0
51 If enabled, aligned size of global data is reserved in
52 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
53 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
54 pre-reloc global data is put into this SRAM, too.
56 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
57 bool "SPL image size check: provide space for malloc() pool before relocation"
58 depends on SPL_SIZE_LIMIT > 0
60 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
61 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
62 describes the size of SRAM available for SPL when pre-reloc malloc
63 pool is put into this SRAM, too.
65 config SPL_SIZE_LIMIT_PROVIDE_STACK
66 hex "SPL image size check: provide stack space before relocation"
67 depends on SPL_SIZE_LIMIT > 0
70 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
71 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
72 of SRAM available for SPL when the stack required before reolcation
75 config SPL_SYS_STACK_F_CHECK_BYTE
79 Constant used to check the stack
81 config SPL_SYS_REPORT_STACK_F_USAGE
82 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
83 bool "Check and report stack usage in SPL before relocation"
85 If this option is enabled, the initial SPL stack is filled with 0xaa
86 very early, up to the size configured with
87 SPL_SIZE_LIMIT_PROVIDE_STACK.
88 Later when SPL is done using this initial stack and switches to a
89 stack in DRAM, the actually used size of this initial stack is
90 reported by examining the memory and searching for the lowest
91 occurrence of non 0xaa bytes.
92 This default implementation works for stacks growing down only.
94 menu "PowerPC and LayerScape SPL Boot options"
97 bool "Load SPL from NAND flash"
98 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
101 bool "Load SPL from SD Card / eMMC"
102 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
105 bool "Load SPL from SPI flash"
106 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
109 bool "Create SPL in Freescale PBI format"
110 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
113 Create boot binary having SPL binary in PBI format concatenated with
119 bool "Pass hand-off information from SPL to U-Boot proper"
122 It is useful to be able to pass information from SPL to U-Boot
123 proper to preserve state that is known in SPL and is needed in U-Boot.
124 Enable this to locate the handoff information in U-Boot proper, early
125 in boot. It is available in gd->handoff. The state state is set up
126 in SPL (or TPL if that is being used).
131 bool "Pass hand-off information from SPL to U-Boot proper"
132 depends on HANDOFF && SPL_BLOBLIST
135 This option enables SPL to write handoff information. This can be
136 used to pass information like the size of SDRAM from SPL to U-Boot
137 proper. Also SPL can receive information from TPL in the same place
141 string "Linker script for the SPL stage"
142 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
144 The SPL stage will usually require a different linker-script
145 (as it runs from a different memory region) than the regular
146 U-Boot stage. Set this to the path of the linker-script to
151 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
152 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
153 default 0x20060 if MACH_SUN50I_H6
154 default 0x00060 if ARCH_SUNXI
155 default 0xfffc0000 if ARCH_ZYNQMP
158 The address in memory that SPL will be running from.
160 config SPL_BOARD_INIT
161 bool "Call board-specific initialization in SPL"
163 If this option is enabled, U-Boot will call the function
164 spl_board_init() from board_init_r(). This function should be
165 provided by the board.
167 config SPL_BOOTROM_SUPPORT
168 bool "Support returning to the BOOTROM"
170 Some platforms (e.g. the Rockchip RK3368) provide support in their
171 ROM for loading the next boot-stage after performing basic setup
174 Enable this option, to return to the BOOTROM through the
175 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
176 boot device list, if not implemented for a given board)
178 config SPL_BOOTCOUNT_LIMIT
179 bool "Support bootcount in SPL"
180 depends on SPL_ENV_SUPPORT
182 On some boards, which use 'falcon' mode, it is necessary to check
183 and increment the number of boot attempts. Such boards do not
184 use proper U-Boot for normal boot flow and hence needs those
185 adjustments to be done in the SPL.
187 config SPL_RAW_IMAGE_SUPPORT
188 bool "Support SPL loading and booting of RAW images"
189 default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
190 default y if !TI_SECURE_DEVICE
192 SPL will support loading and booting a RAW image when this option
193 is y. If this is not set, SPL will move on to other available
194 boot media to find a suitable image.
196 config SPL_LEGACY_IMAGE_SUPPORT
197 bool "Support SPL loading and booting of Legacy images"
198 default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
200 SPL will support loading and booting Legacy images when this option
201 is y. If this is not set, SPL will move on to other available
202 boot media to find a suitable image.
204 config SPL_LEGACY_IMAGE_CRC_CHECK
205 bool "Check CRC of Legacy images"
206 depends on SPL_LEGACY_IMAGE_SUPPORT
207 select SPL_CRC32_SUPPORT
209 Enable this to check the CRC of Legacy images. While this increases
210 reliability, it affects both code size and boot duration.
211 If disabled, Legacy images are booted if the image magic and size
212 are correct, without further integrity checks.
214 config SPL_SYS_MALLOC_SIMPLE
216 prompt "Only use malloc_simple functions in the SPL"
218 Say Y here to only use the *_simple malloc functions from
219 malloc_simple.c, rather then using the versions from dlmalloc.c;
220 this will make the SPL binary smaller at the cost of more heap
221 usage as the *_simple malloc functions do not re-use free-ed mem.
223 config TPL_SYS_MALLOC_SIMPLE
225 prompt "Only use malloc_simple functions in the TPL"
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 TPL binary smaller at the cost of more heap
231 usage as the *_simple malloc functions do not re-use free-ed mem.
234 bool "Enable SDRAM location for SPL stack"
236 SPL starts off execution in SRAM and thus typically has only a small
237 stack available. Since SPL sets up DRAM while in its board_init_f()
238 function, it is possible for the stack to move there before
239 board_init_r() is reached. This option enables a special SDRAM
240 location for the SPL stack. U-Boot SPL switches to this after
241 board_init_f() completes, and before board_init_r() starts.
243 config SPL_STACK_R_ADDR
244 depends on SPL_STACK_R
245 hex "SDRAM location for SPL stack"
246 default 0x82000000 if ARCH_OMAP2PLUS
248 Specify the address in SDRAM for the SPL stack. This will be set up
249 before board_init_r() is called.
251 config SPL_STACK_R_MALLOC_SIMPLE_LEN
252 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
253 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
256 Specify the amount of the stack to use as memory pool for
257 malloc_simple after switching the stack to DRAM. This may be set
258 to give board_init_r() a larger heap then the initial heap in
259 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
261 config SPL_SEPARATE_BSS
262 bool "BSS section is in a different memory region from text"
264 Some platforms need a large BSS region in SPL and can provide this
265 because RAM is already set up. In this case BSS can be moved to RAM.
266 This option should then be enabled so that the correct device tree
267 location is used. Normally we put the device tree at the end of BSS
268 but with this option enabled, it goes at _image_binary_end.
270 config SPL_BANNER_PRINT
271 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
274 If this option is enabled, SPL will print the banner with version
275 info. Disabling this option could be useful to reduce SPL boot time
276 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
278 config TPL_BANNER_PRINT
279 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
283 If this option is enabled, TPL will print the banner with version
284 info. Disabling this option could be useful to reduce TPL boot time
285 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
288 depends on ARM && !ARM64
289 bool "Allows initializing BSS early before entering board_init_f"
291 On some platform we have sufficient memory available early on to
292 allow setting up and using a basic BSS prior to entering
293 board_init_f. Activating this option will also de-activate the
294 clearing of BSS during the SPL relocation process, thus allowing
295 to carry state from board_init_f to board_init_r by way of BSS.
297 config SPL_DISPLAY_PRINT
298 bool "Display a board-specific message in SPL"
300 If this option is enabled, U-Boot will call the function
301 spl_display_print() immediately after displaying the SPL console
302 banner ("U-Boot SPL ..."). This function should be provided by
305 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
306 bool "MMC raw mode: by sector"
307 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
308 ARCH_MX6 || ARCH_MX7 || \
309 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
310 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
311 OMAP44XX || OMAP54XX || AM33XX || AM43XX
313 Use sector number for specifying U-Boot location on MMC/SD in
316 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
317 hex "Address on the MMC to load U-Boot from"
318 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
319 default 0x50 if ARCH_SUNXI
320 default 0x75 if ARCH_DAVINCI
321 default 0x8a if ARCH_MX6 || ARCH_MX7
322 default 0x100 if ARCH_UNIPHIER
323 default 0x140 if ARCH_MVEBU
324 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
325 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
326 OMAP54XX || AM33XX || AM43XX || ARCH_K3
327 default 0x4000 if ARCH_ROCKCHIP
329 Address on the MMC to load U-Boot from, when the MMC is being used
330 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
332 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
333 hex "U-Boot main hardware partition image offset"
334 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
337 On some platforms SPL location depends on hardware partition. The ROM
338 code skips the MBR sector when loading SPL from main hardware data
339 partition. This adds offset to the main U-Boot image. Set this symbol
340 to the number of skipped sectors.
342 If unsure, leave the default.
344 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
345 bool "MMC Raw mode: by partition"
347 Use a partition for loading U-Boot when using MMC/SD in raw mode.
349 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
350 hex "Partition to use to load U-Boot from"
351 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
354 Partition on the MMC to load U-Boot from when the MMC is being
357 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
358 bool "MMC raw mode: by partition type"
359 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
361 Use partition type for specifying U-Boot partition on MMC/SD in
362 raw mode. U-Boot will be loaded from the first partition of this
365 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
366 hex "Partition Type on the MMC to load U-Boot from"
367 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
369 Partition Type on the MMC to load U-Boot from, when the MMC is being
372 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
373 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
374 depends on SUPPORT_EMMC_BOOT
376 eMMC boot partition is normally configured by the bits of the EXT_CSD
377 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
378 cases it might be required in SPL to load the image from different
379 partition than the partition selected by EXT_CSC_PART_CONFIG register.
380 Enable this option if you intend to use an eMMC boot partition other
381 then selected via EXT_CSC_PART_CONFIG register and specify the custom
382 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
385 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
386 int "Number of the eMMC boot partition to use"
387 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
390 eMMC boot partition number to use when the eMMC in raw mode and
391 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
392 by user defined partition number.
394 config SPL_CRC32_SUPPORT
396 default y if SPL_LEGACY_IMAGE_SUPPORT
398 Enable this to support CRC32 in uImages or FIT images within SPL.
399 This is a 32-bit checksum value that can be used to verify images.
400 For FIT images, this is the least secure type of checksum, suitable
401 for detected accidental image corruption. For secure applications you
402 should consider SHA1 or SHA256.
404 config SPL_MD5_SUPPORT
408 Enable this to support MD5 in FIT images within SPL. An MD5
409 checksum is a 128-bit hash value used to check that the image
410 contents have not been corrupted. Note that MD5 is not considered
411 secure as it is possible (with a brute-force attack) to adjust the
412 image while still retaining the same MD5 hash value. For secure
413 applications where images may be changed maliciously, you should
414 consider SHA1 or SHA256.
416 config SPL_SHA1_SUPPORT
421 Enable this to support SHA1 in FIT images within SPL. A SHA1
422 checksum is a 160-bit (20-byte) hash value used to check that the
423 image contents have not been corrupted or maliciously altered.
424 While SHA1 is fairly secure it is coming to the end of its life
425 due to the expanding computing power available to brute-force
426 attacks. For more security, consider SHA256.
428 config SPL_SHA256_SUPPORT
429 bool "Support SHA256"
433 Enable this to support SHA256 in FIT images within SPL. A SHA256
434 checksum is a 256-bit (32-byte) hash value used to check that the
435 image contents have not been corrupted. SHA256 is recommended for
436 use in secure applications since (as at 2016) there is no known
437 feasible attack that could produce a 'collision' with differing
438 input data. Use this for the highest security. Note that only the
439 SHA256 variant is supported: SHA512 and others are not currently
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 || MACH_SUN50I_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 removes the detection of image types (which forces the
452 first image to be treated as having a U-Boot style calling
453 convention) and skips the recording of each loaded payload
454 (i.e. loadable) into the FDT (modifying the loaded FDT to
455 ensure this information is available to the next image
458 config SPL_CACHE_SUPPORT
459 bool "Support CACHE drivers"
461 Enable CACHE drivers in SPL. These drivers can keep data so that
462 future requests for that data can be served faster. Enable this option
463 to build the drivers in drivers/cache as part of an SPL build.
465 config SPL_CPU_SUPPORT
466 bool "Support CPU drivers"
468 Enable this to support CPU drivers in SPL. These drivers can set
469 up CPUs and provide information about them such as the model and
470 name. This can be useful in SPL since setting up the CPUs earlier
471 may improve boot performance. Enable this option to build the
472 drivers in drivers/cpu as part of an SPL build.
474 config SPL_CRYPTO_SUPPORT
475 bool "Support crypto drivers"
477 Enable crypto drivers in SPL. These drivers can be used to
478 accelerate secure boot processing in secure applications. Enable
479 this option to build the drivers in drivers/crypto as part of an
482 config SPL_HASH_SUPPORT
483 bool "Support hashing drivers"
487 Enable hashing drivers in SPL. These drivers can be used to
488 accelerate secure boot processing in secure applications. Enable
489 this option to build system-specific drivers for hash acceleration
490 as part of an SPL build.
492 config TPL_HASH_SUPPORT
493 bool "Support hashing drivers in TPL"
498 Enable hashing drivers in SPL. These drivers can be used to
499 accelerate secure boot processing in secure applications. Enable
500 this option to build system-specific drivers for hash acceleration
501 as part of an SPL build.
504 bool "Support DMA drivers"
506 Enable DMA (direct-memory-access) drivers in SPL. These drivers
507 can be used to handle memory-to-peripheral data transfer without
508 the CPU moving the data. Enable this option to build the drivers
509 in drivers/dma as part of an SPL build.
511 config SPL_DRIVERS_MISC_SUPPORT
512 bool "Support misc drivers"
514 Enable miscellaneous drivers in SPL. These drivers perform various
515 tasks that don't fall nicely into other categories, Enable this
516 option to build the drivers in drivers/misc as part of an SPL
517 build, for those that support building in SPL (not all drivers do).
519 config SPL_ENV_SUPPORT
520 bool "Support an environment"
522 Enable environment support in SPL. The U-Boot environment provides
523 a number of settings (essentially name/value pairs) which can
524 control many aspects of U-Boot's operation. Normally this is not
525 needed in SPL as it has a much simpler task with less
526 configuration. But some boards use this to support 'Falcon' boot
527 on EXT2 and FAT, where SPL boots directly into Linux without
528 starting U-Boot first. Enabling this option will make env_get()
529 and env_set() available in SPL.
532 bool "Support save environment"
533 depends on SPL_ENV_SUPPORT
534 select SPL_MMC_WRITE if ENV_IS_IN_MMC
536 Enable save environment support in SPL after setenv. By default
537 the saveenv option is not provided in SPL, but some boards need
538 this support in 'Falcon' boot, where SPL need to boot from
539 different images based on environment variable set by OS. For
540 example OS may set "reboot_image" environment variable to
541 "recovery" inorder to boot recovery image by SPL. The SPL read
542 "reboot_image" and act accordingly and change the reboot_image
543 to default mode using setenv and save the environment.
545 config SPL_ETH_SUPPORT
546 bool "Support Ethernet"
547 depends on SPL_ENV_SUPPORT
549 Enable access to the network subsystem and associated Ethernet
550 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
551 link rather than from an on-board peripheral. Environment support
552 is required since the network stack uses a number of environment
553 variables. See also SPL_NET_SUPPORT.
556 bool "Support EXT filesystems"
558 Enable support for EXT2/3/4 filesystems with SPL. This permits
559 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
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
579 config SPL_FPGA_SUPPORT
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
590 config SPL_GPIO_SUPPORT
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.
601 config SPL_I2C_SUPPORT
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
654 config SPL_MMC_SUPPORT
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
667 bool "Tiny MMC framework in SPL"
668 depends on SPL_MMC_SUPPORT
671 Enable MMC framework tinification support. This option is useful if
672 if your SPL is extremely size constrained. Heed the warning, enable
673 this option if and only if you know exactly what you are doing, if
674 you are reading this help text, you most likely have no idea :-)
676 The MMC framework is reduced to bare minimum to be useful. No malloc
677 support is needed for the MMC framework operation with this option
678 enabled. The framework supports exactly one MMC device and exactly
679 one MMC driver. The MMC driver can be adjusted to avoid any malloc
680 operations too, which can remove the need for malloc support in SPL
681 and thus further reduce footprint.
684 bool "MMC/SD/SDIO card support for write operations in SPL"
685 depends on SPL_MMC_SUPPORT
688 Enable write access to MMC and SD Cards in SPL
691 config SPL_MPC8XXX_INIT_DDR_SUPPORT
692 bool "Support MPC8XXX DDR init"
694 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
695 random-access memory) on the MPC8XXX family within SPL. This
696 allows DRAM to be set up before loading U-Boot into that DRAM,
699 config SPL_MTD_SUPPORT
700 bool "Support MTD drivers"
702 Enable support for MTD (Memory Technology Device) within SPL. MTD
703 provides a block interface over raw NAND and can also be used with
704 SPI flash. This allows SPL to load U-Boot from supported MTD
705 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
706 to enable specific MTD drivers.
708 config SPL_MUSB_NEW_SUPPORT
709 bool "Support new Mentor Graphics USB"
711 Enable support for Mentor Graphics USB in SPL. This is a new
712 driver used by some boards. Enable this option to build
713 the drivers in drivers/usb/musb-new as part of an SPL build. The
714 old drivers are in drivers/usb/musb.
716 config SPL_NAND_SUPPORT
717 bool "Support NAND flash"
719 Enable support for NAND (Negative AND) flash in SPL. NAND flash
720 can be used to allow SPL to load U-Boot from supported devices.
721 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
727 Enable support for loading payloads from UBI. See
728 README.ubispl for more info.
733 bool "Support cache drivers in SPL"
735 Enable support for cache drivers in SPL.
738 bool "Support SPI DM drivers in SPL"
740 Enable support for SPI DM drivers in SPL.
744 config SPL_UBI_LOAD_BY_VOLNAME
745 bool "Support loading volumes by name"
747 This enables support for loading UBI volumes by name. When this
748 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
749 configure the volume name from which to load U-Boot.
751 config SPL_UBI_MAX_VOL_LEBS
752 int "Maximum number of LEBs per volume"
755 The maximum number of logical eraseblocks which a static volume
756 to load can contain. Used for sizing the scan data structure.
758 config SPL_UBI_MAX_PEB_SIZE
759 int "Maximum PEB size"
762 The maximum physical erase block size.
764 config SPL_UBI_MAX_PEBS
765 int "Maximum number of PEBs"
768 The maximum physical erase block size. If not overridden by
769 board code, this value will be used as the actual number of PEBs.
771 config SPL_UBI_PEB_OFFSET
772 int "Offset to first UBI PEB"
775 The offset in number of PEBs from the start of flash to the first
776 PEB part of the UBI image.
778 config SPL_UBI_VID_OFFSET
779 int "Offset to VID header"
782 config SPL_UBI_LEB_START
783 int "Offset to LEB in PEB"
786 The offset in bytes to the LEB within a PEB.
788 config SPL_UBI_INFO_ADDR
789 hex "Address to place UBI scan info"
792 Address for ubispl to place the scan info. Read README.ubispl to
793 determine the required size
795 config SPL_UBI_VOL_IDS
796 int "Maximum volume id"
799 The maximum volume id which can be loaded. Used for sizing the
802 config SPL_UBI_LOAD_MONITOR_ID
803 int "id of U-Boot volume"
806 The UBI volume id from which to load U-Boot
808 config SPL_UBI_LOAD_MONITOR_VOLNAME
809 string "volume name of U-Boot volume"
810 depends on SPL_UBI_LOAD_BY_VOLNAME
812 The UBI volume name from which to load U-Boot
814 config SPL_UBI_LOAD_KERNEL_ID
815 int "id of kernel volume"
816 depends on SPL_OS_BOOT && SPL_UBI
818 The UBI volume id from which to load the kernel
820 config SPL_UBI_LOAD_ARGS_ID
821 int "id of kernel args volume"
822 depends on SPL_OS_BOOT && SPL_UBI
824 The UBI volume id from which to load the device tree
826 config UBI_SPL_SILENCE_MSG
827 bool "silence UBI SPL messages"
830 Disable messages from UBI SPL. This leaves warnings
835 config SPL_NET_SUPPORT
836 bool "Support networking"
838 Enable support for network devices (such as Ethernet) in SPL.
839 This permits SPL to load U-Boot over a network link rather than
840 from an on-board peripheral. Environment support is required since
841 the network stack uses a number of environment variables. See also
845 config SPL_NET_VCI_STRING
846 string "BOOTP Vendor Class Identifier string sent by SPL"
848 As defined by RFC 2132 the vendor class identifier field can be
849 sent by the client to identify the vendor type and configuration
850 of a client. This is often used in practice to allow for the DHCP
851 server to specify different files to load depending on if the ROM,
852 SPL or U-Boot itself makes the request
853 endif # if SPL_NET_SUPPORT
855 config SPL_NO_CPU_SUPPORT
856 bool "Drop CPU code in SPL"
858 This is specific to the ARM926EJ-S CPU. It disables the standard
859 start.S start-up code, presumably so that a replacement can be
860 used on that CPU. You should not enable it unless you know what
863 config SPL_NOR_SUPPORT
864 bool "Support NOR flash"
866 Enable support for loading U-Boot from memory-mapped NOR (Negative
867 OR) flash in SPL. NOR flash is slow to write but fast to read, and
868 a memory-mapped device makes it very easy to access. Loading from
869 NOR is typically achieved with just a memcpy().
871 config SPL_XIP_SUPPORT
875 Enable support for execute in place of U-Boot or kernel image. There
876 is no need to copy image from flash to ram if flash supports execute
877 in place. Its very useful in systems having enough flash but not
878 enough ram to load the image.
880 config SPL_ONENAND_SUPPORT
881 bool "Support OneNAND flash"
883 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
884 a type of NAND flash and therefore can be used to allow SPL to
885 load U-Boot from supported devices. This enables the drivers in
886 drivers/mtd/onenand as part of an SPL build.
889 bool "Activate Falcon Mode"
890 depends on !TI_SECURE_DEVICE
893 Enable booting directly to an OS from SPL.
894 for more info read doc/README.falcon
898 hex "addr, where OS is found"
899 depends on SPL_NOR_SUPPORT
901 Specify the address, where the OS image is found, which
908 default "tpl/u-boot-with-tpl.bin" if TPL
911 Payload for SPL boot. For backward compatibility, default to
912 u-boot.bin, i.e. RAW image without any header. In case of
913 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
917 bool "Support PCI drivers"
919 Enable support for PCI in SPL. For platforms that need PCI to boot,
920 or must perform some init using PCI in SPL, this provides the
921 necessary driver support. This enables the drivers in drivers/pci
922 as part of an SPL build.
924 config SPL_PCH_SUPPORT
925 bool "Support PCH drivers"
927 Enable support for PCH (Platform Controller Hub) devices in SPL.
928 These are used to set up GPIOs and the SPI peripheral early in
929 boot. This enables the drivers in drivers/pch as part of an SPL
932 config SPL_POST_MEM_SUPPORT
933 bool "Support POST drivers"
935 Enable support for POST (Power-on Self Test) in SPL. POST is a
936 procedure that checks that the hardware (CPU or board) appears to
937 be functionally correctly. It is a sanity check that can be
938 performed before booting. This enables the drivers in post/drivers
939 as part of an SPL build.
942 bool "Support reset drivers"
945 Enable support for reset control in SPL.
946 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
947 by using the generic reset API provided by driver model.
948 This enables the drivers in drivers/reset as part of an SPL build.
950 config SPL_POWER_SUPPORT
951 bool "Support power drivers"
953 Enable support for power control in SPL. This includes support
954 for PMICs (Power-management Integrated Circuits) and some of the
955 features provided by PMICs. In particular, voltage regulators can
956 be used to enable/disable power and vary its voltage. That can be
957 useful in SPL to turn on boot peripherals and adjust CPU voltage
958 so that the clock speed can be increased. This enables the drivers
959 in drivers/power, drivers/power/pmic and drivers/power/regulator
960 as part of an SPL build.
962 config SPL_POWER_DOMAIN
963 bool "Support power domain drivers"
965 Enable support for power domain control in SPL. Many SoCs allow
966 power to be applied to or removed from portions of the SoC (power
967 domains). This may be used to save power. This API provides the
968 means to control such power management hardware. This enables
969 the drivers in drivers/power/domain as part of a SPL build.
971 config SPL_RAM_SUPPORT
972 bool "Support booting from RAM"
973 default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
975 Enable booting of an image in RAM. The image can be preloaded or
976 it can be loaded by SPL directly into RAM (e.g. using USB).
978 config SPL_RAM_DEVICE
979 bool "Support booting from preloaded image in RAM"
980 depends on SPL_RAM_SUPPORT
981 default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
983 Enable booting of an image already loaded in RAM. The image has to
984 be already in memory when SPL takes over, e.g. loaded by the boot
987 config SPL_REMOTEPROC
988 bool "Support REMOTEPROCS"
990 Enable support for REMOTEPROCs in SPL. This permits to load
991 a remote processor firmware in SPL.
993 config SPL_RTC_SUPPORT
994 bool "Support RTC drivers"
996 Enable RTC (Real-time Clock) support in SPL. This includes support
997 for reading and setting the time. Some RTC devices also have some
998 non-volatile (battery-backed) memory which is accessible if
999 needed. This enables the drivers in drivers/rtc as part of an SPL
1002 config SPL_SATA_SUPPORT
1003 bool "Support loading from SATA"
1005 Enable support for SATA (Serial AT attachment) in SPL. This allows
1006 use of SATA devices such as hard drives and flash drivers for
1007 loading U-Boot. SATA is used in higher-end embedded systems and
1008 can provide higher performance than MMC , at somewhat higher
1009 expense and power consumption. This enables loading from SATA
1010 using a configured device.
1012 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1013 bool "SATA raw mode: by sector"
1014 depends on SPL_SATA_SUPPORT
1016 Use sector number for specifying U-Boot location on SATA disk in
1019 config SPL_SATA_RAW_U_BOOT_SECTOR
1020 hex "Sector on the SATA disk to load U-Boot from"
1021 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1023 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1024 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1026 config SPL_SERIAL_SUPPORT
1027 bool "Support serial"
1031 Enable support for serial in SPL. This allows use of a serial UART
1032 for displaying messages while SPL is running. It also brings in
1033 printf() and panic() functions. This should normally be enabled
1034 unless there are space reasons not to. Even then, consider
1035 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1037 config SPL_SPI_SUPPORT
1038 bool "Support SPI drivers"
1040 Enable support for using SPI in SPL. This is used for connecting
1041 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1042 more details on that. The SPI driver provides the transport for
1043 data between the SPI flash and the CPU. This option can be used to
1044 enable SPI drivers that are needed for other purposes also, such
1047 config SPL_SPI_FLASH_SUPPORT
1048 bool "Support SPI flash drivers"
1049 depends on SPL_SPI_SUPPORT
1051 Enable support for using SPI flash in SPL, and loading U-Boot from
1052 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1053 the SPI bus that is used to connect it to a system. It is a simple
1054 but fast bidirectional 4-wire bus (clock, chip select and two data
1055 lines). This enables the drivers in drivers/mtd/spi as part of an
1056 SPL build. This normally requires SPL_SPI_SUPPORT.
1058 if SPL_SPI_FLASH_SUPPORT
1060 config SPL_SPI_FLASH_TINY
1061 bool "Enable low footprint SPL SPI Flash support"
1062 depends on !SPI_FLASH_BAR
1063 default y if SPI_FLASH
1065 Enable lightweight SPL SPI Flash support that supports just reading
1066 data/images from flash. No support to write/erase flash. Enable
1067 this if you have SPL size limitations and don't need full
1068 fledged SPI flash support.
1070 config SPL_SPI_FLASH_SFDP_SUPPORT
1071 bool "SFDP table parsing support for SPI NOR flashes"
1072 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1074 Enable support for parsing and auto discovery of parameters for
1075 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1076 tables as per JESD216 standard in SPL.
1079 bool "Support loading from SPI flash"
1081 Enable support for loading next stage, U-Boot or otherwise, from
1082 SPI NOR in U-Boot SPL.
1084 endif # SPL_SPI_FLASH_SUPPORT
1086 config SYS_SPI_U_BOOT_OFFS
1087 hex "address of u-boot payload in SPI flash"
1088 default 0x8000 if ARCH_SUNXI
1090 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1092 Address within SPI-Flash from where the u-boot payload is fetched
1096 bool "Driver support for thermal devices"
1098 Enable support for temperature-sensing devices. Some SoCs have on-chip
1099 temperature sensors to permit warnings, speed throttling or even
1100 automatic power-off when the temperature gets too high or low. Other
1101 devices may be discrete but connected on a suitable bus.
1103 config SPL_USB_HOST_SUPPORT
1104 bool "Support USB host drivers"
1105 select HAVE_BLOCK_DEVICE
1107 Enable access to USB (Universal Serial Bus) host devices so that
1108 SPL can load U-Boot from a connected USB peripheral, such as a USB
1109 flash stick. While USB takes a little longer to start up than most
1110 buses, it is very flexible since many different types of storage
1111 device can be attached. This option enables the drivers in
1112 drivers/usb/host as part of an SPL build.
1114 config SPL_USB_STORAGE
1115 bool "Support loading from USB"
1116 depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
1118 Enable support for USB devices in SPL. This allows use of USB
1119 devices such as hard drives and flash drivers for loading U-Boot.
1120 The actual drivers are enabled separately using the normal U-Boot
1121 config options. This enables loading from USB using a configured
1124 config SPL_USB_GADGET
1125 bool "Suppport USB Gadget drivers"
1127 Enable USB Gadget API which allows to enable USB device functions
1132 config SPL_USB_ETHER
1133 bool "Support USB Ethernet drivers"
1135 Enable access to the USB network subsystem and associated
1136 drivers in SPL. This permits SPL to load U-Boot over a
1137 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1138 than from an onboard peripheral. Environment support is required
1139 since the network stack uses a number of environment variables.
1140 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
1143 bool "Support DFU (Device Firmware Upgrade)"
1144 select SPL_HASH_SUPPORT
1145 select SPL_DFU_NO_RESET
1146 depends on SPL_RAM_SUPPORT
1148 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1149 RAM memory device support. The ROM code will load and execute
1150 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1151 selected device partition from host-pc using dfu-utils.
1152 This feature is useful to flash the binaries to factory or bare-metal
1153 boards using USB interface.
1156 bool "DFU device selection"
1161 depends on SPL_DFU && SPL_RAM_SUPPORT
1163 select RAM/DDR memory device for loading binary images
1164 (u-boot/kernel) to the selected device partition using
1165 DFU and execute the u-boot/kernel from RAM.
1169 config SPL_USB_SDP_SUPPORT
1170 bool "Support SDP (Serial Download Protocol)"
1172 Enable Serial Download Protocol (SDP) device support in SPL. This
1173 allows to download images into memory and execute (jump to) them
1174 using the same protocol as implemented by the i.MX family's boot ROM.
1177 config SPL_WATCHDOG_SUPPORT
1178 bool "Support watchdog drivers"
1179 imply SPL_WDT if !HW_WATCHDOG
1181 Enable support for watchdog drivers in SPL. A watchdog is
1182 typically a hardware peripheral which can reset the system when it
1183 detects no activity for a while (such as a software crash). This
1184 enables the drivers in drivers/watchdog as part of an SPL build.
1186 config SPL_YMODEM_SUPPORT
1187 bool "Support loading using Ymodem"
1188 depends on SPL_SERIAL_SUPPORT
1190 While loading from serial is slow it can be a useful backup when
1191 there is no other option. The Ymodem protocol provides a reliable
1192 means of transmitting U-Boot over a serial line for using in SPL,
1193 with a checksum to ensure correctness.
1196 bool "Support ARM Trusted Firmware"
1199 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1200 is loaded by SPL (which is considered as BL2 in ATF terminology).
1201 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1203 config SPL_ATF_NO_PLATFORM_PARAM
1204 bool "Pass no platform parameter"
1207 While we expect to call a pointer to a valid FDT (or NULL)
1208 as the platform parameter to an ATF, some ATF versions are
1209 not U-Boot aware and have an insufficiently robust parameter
1210 validation to gracefully reject a FDT being passed.
1212 If this option is enabled, the spl_atf os-type handler will
1213 always pass NULL for the platform parameter.
1215 If your ATF is affected, say Y.
1217 config SPL_AM33XX_ENABLE_RTC32K_OSC
1218 bool "Enable the RTC32K OSC on AM33xx based platforms"
1221 Enable access to the AM33xx RTC and select the external 32kHz clock
1225 bool "Support OP-TEE Trusted OS"
1228 OP-TEE is an open source Trusted OS which is loaded by SPL.
1229 More detail at: https://github.com/OP-TEE/optee_os
1232 bool "Support RISC-V OpenSBI"
1233 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1235 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1236 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1237 firmware. It is loaded and started by U-Boot SPL.
1239 More details are available at https://github.com/riscv/opensbi and
1240 https://github.com/riscv/riscv-sbi-doc
1242 config SPL_OPENSBI_LOAD_ADDR
1243 hex "OpenSBI load address"
1244 depends on SPL_OPENSBI
1246 Load address of the OpenSBI binary.
1250 depends on SUPPORT_TPL
1253 If you want to build TPL as well as the normal image and SPL, say Y.
1257 config TPL_SIZE_LIMIT
1258 hex "Maximum size of TPL image"
1262 Specifies the maximum length of the U-Boot TPL image.
1263 If this value is zero, it is ignored.
1265 config TPL_FRAMEWORK
1266 bool "Support TPL based upon the common SPL framework"
1267 default y if SPL_FRAMEWORK
1269 Enable the SPL framework under common/spl/ for TPL builds.
1270 This framework supports MMC, NAND and YMODEM and other methods
1271 loading of U-Boot's SPL stage. If unsure, say Y.
1274 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1275 depends on HANDOFF && TPL_BLOBLIST
1278 This option enables TPL to write handoff information. This can be
1279 used to pass information like the size of SDRAM from TPL to U-Boot
1280 proper. The information is also available to SPL if it is useful
1283 config TPL_BOARD_INIT
1284 bool "Call board-specific initialization in TPL"
1286 If this option is enabled, U-Boot will call the function
1287 spl_board_init() from board_init_r(). This function should be
1288 provided by the board.
1291 string "Linker script for the TPL stage"
1293 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1294 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1296 The TPL stage will usually require a different linker-script
1297 (as it runs from a different memory region) than the regular
1298 U-Boot stage. Set this to the path of the linker-script to
1301 May be left empty to trigger the Makefile infrastructure to
1302 fall back to the linker-script used for the SPL stage.
1304 config TPL_NEEDS_SEPARATE_TEXT_BASE
1305 bool "TPL needs a separate text-base"
1309 Enable, if the TPL stage should not inherit its text-base
1310 from the SPL stage. When enabled, a base address for the
1311 .text sections of the TPL stage has to be set below.
1313 config TPL_NEEDS_SEPARATE_STACK
1314 bool "TPL needs a separate initial stack-pointer"
1318 Enable, if the TPL stage should not inherit its initial
1319 stack-pointer from the settings for the SPL stage.
1321 config TPL_TEXT_BASE
1322 hex "Base address for the .text section of the TPL stage"
1323 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1325 The base address for the .text section of the TPL stage.
1328 int "Maximum size (in bytes) for the TPL stage"
1332 The maximum size (in bytes) of the TPL stage.
1335 hex "Address of the initial stack-pointer for the TPL stage"
1336 depends on TPL_NEEDS_SEPARATE_STACK
1338 The address of the initial stack-pointer for the TPL stage.
1339 Usually this will be the (aligned) top-of-stack.
1341 config TPL_BOOTROM_SUPPORT
1342 bool "Support returning to the BOOTROM (from TPL)"
1344 Some platforms (e.g. the Rockchip RK3368) provide support in their
1345 ROM for loading the next boot-stage after performing basic setup
1348 Enable this option, to return to the BOOTROM through the
1349 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1350 boot device list, if not implemented for a given board)
1352 config TPL_DRIVERS_MISC_SUPPORT
1353 bool "Support misc drivers in TPL"
1355 Enable miscellaneous drivers in TPL. These drivers perform various
1356 tasks that don't fall nicely into other categories, Enable this
1357 option to build the drivers in drivers/misc as part of an TPL
1358 build, for those that support building in TPL (not all drivers do).
1360 config TPL_ENV_SUPPORT
1361 bool "Support an environment"
1363 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1365 config TPL_GPIO_SUPPORT
1366 bool "Support GPIO in TPL"
1368 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1369 GPIOs allow U-Boot to read the state of an input line (high or
1370 low) and set the state of an output line. This can be used to
1371 drive LEDs, control power to various system parts and read user
1372 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1373 for example. Enable this option to build the drivers in
1374 drivers/gpio as part of an TPL build.
1376 config TPL_I2C_SUPPORT
1379 Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
1382 config TPL_LIBCOMMON_SUPPORT
1383 bool "Support common libraries"
1385 Enable support for common U-Boot libraries within TPL. See
1386 SPL_LIBCOMMON_SUPPORT for details.
1388 config TPL_LIBGENERIC_SUPPORT
1389 bool "Support generic libraries"
1391 Enable support for generic U-Boot libraries within TPL. See
1392 SPL_LIBGENERIC_SUPPORT for details.
1394 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1395 bool "Support MPC8XXX DDR init"
1397 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1398 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1400 config TPL_MMC_SUPPORT
1404 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1406 config TPL_NAND_SUPPORT
1407 bool "Support NAND flash"
1409 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1412 bool "Support PCI drivers"
1414 Enable support for PCI in TPL. For platforms that need PCI to boot,
1415 or must perform some init using PCI in SPL, this provides the
1416 necessary driver support. This enables the drivers in drivers/pci
1417 as part of a TPL build.
1419 config TPL_PCH_SUPPORT
1420 bool "Support PCH drivers"
1422 Enable support for PCH (Platform Controller Hub) devices in TPL.
1423 These are used to set up GPIOs and the SPI peripheral early in
1424 boot. This enables the drivers in drivers/pch as part of a TPL
1427 config TPL_RAM_SUPPORT
1428 bool "Support booting from RAM"
1430 Enable booting of an image in RAM. The image can be preloaded or
1431 it can be loaded by TPL directly into RAM (e.g. using USB).
1433 config TPL_RAM_DEVICE
1434 bool "Support booting from preloaded image in RAM"
1435 depends on TPL_RAM_SUPPORT
1437 Enable booting of an image already loaded in RAM. The image has to
1438 be already in memory when TPL takes over, e.g. loaded by the boot
1441 config TPL_RTC_SUPPORT
1442 bool "Support RTC drivers"
1444 Enable RTC (Real-time Clock) support in TPL. This includes support
1445 for reading and setting the time. Some RTC devices also have some
1446 non-volatile (battery-backed) memory which is accessible if
1447 needed. This enables the drivers in drivers/rtc as part of an TPL
1450 config TPL_SERIAL_SUPPORT
1451 bool "Support serial"
1455 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1458 config TPL_SPI_FLASH_SUPPORT
1459 bool "Support SPI flash drivers"
1461 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1465 bool "Support loading from SPI flash"
1466 depends on TPL_SPI_FLASH_SUPPORT
1468 Enable support for loading next stage, U-Boot or otherwise, from
1469 SPI NOR in U-Boot TPL.
1471 config TPL_SPI_SUPPORT
1472 bool "Support SPI drivers"
1474 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1477 config TPL_YMODEM_SUPPORT
1478 bool "Support loading using Ymodem"
1479 depends on TPL_SERIAL_SUPPORT
1481 While loading from serial is slow it can be a useful backup when
1482 there is no other option. The Ymodem protocol provides a reliable
1483 means of transmitting U-Boot over a serial line for using in TPL,
1484 with a checksum to ensure correctness.
1488 config SPL_AT91_MCK_BYPASS
1489 bool "Use external clock signal as a source of main clock for AT91 platforms"
1490 depends on ARCH_AT91
1493 Use external 8 to 24 Mhz clock signal as source of main clock instead
1494 of an external crystal oscillator.
1495 This option disables the internal driving on the XOUT pin.
1496 The external source has to provide a stable clock on the XIN pin.
1497 If this option is disabled, the SoC expects a crystal oscillator
1498 that needs driving on both XIN and XOUT lines.