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 || TARGET_SIFIVE_FU540
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
328 default 0x822 if TARGET_SIFIVE_FU540
330 Address on the MMC to load U-Boot from, when the MMC is being used
331 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
333 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
334 hex "U-Boot main hardware partition image offset"
335 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
338 On some platforms SPL location depends on hardware partition. The ROM
339 code skips the MBR sector when loading SPL from main hardware data
340 partition. This adds offset to the main U-Boot image. Set this symbol
341 to the number of skipped sectors.
343 If unsure, leave the default.
345 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
346 bool "MMC Raw mode: by partition"
348 Use a partition for loading U-Boot when using MMC/SD in raw mode.
350 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
351 hex "Partition to use to load U-Boot from"
352 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
355 Partition on the MMC to load U-Boot from when the MMC is being
358 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
359 bool "MMC raw mode: by partition type"
360 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
362 Use partition type for specifying U-Boot partition on MMC/SD in
363 raw mode. U-Boot will be loaded from the first partition of this
366 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
367 hex "Partition Type on the MMC to load U-Boot from"
368 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
370 Partition Type on the MMC to load U-Boot from, when the MMC is being
373 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
374 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
375 depends on SUPPORT_EMMC_BOOT
377 eMMC boot partition is normally configured by the bits of the EXT_CSD
378 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
379 cases it might be required in SPL to load the image from different
380 partition than the partition selected by EXT_CSC_PART_CONFIG register.
381 Enable this option if you intend to use an eMMC boot partition other
382 then selected via EXT_CSC_PART_CONFIG register and specify the custom
383 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
386 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
387 int "Number of the eMMC boot partition to use"
388 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
391 eMMC boot partition number to use when the eMMC in raw mode and
392 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
393 by user defined partition number.
395 config SPL_CRC32_SUPPORT
397 default y if SPL_LEGACY_IMAGE_SUPPORT
399 Enable this to support CRC32 in uImages or FIT images within SPL.
400 This is a 32-bit checksum value that can be used to verify images.
401 For FIT images, this is the least secure type of checksum, suitable
402 for detected accidental image corruption. For secure applications you
403 should consider SHA1 or SHA256.
405 config SPL_MD5_SUPPORT
409 Enable this to support MD5 in FIT images within SPL. An MD5
410 checksum is a 128-bit hash value used to check that the image
411 contents have not been corrupted. Note that MD5 is not considered
412 secure as it is possible (with a brute-force attack) to adjust the
413 image while still retaining the same MD5 hash value. For secure
414 applications where images may be changed maliciously, you should
415 consider SHA1 or SHA256.
417 config SPL_SHA1_SUPPORT
422 Enable this to support SHA1 in FIT images within SPL. A SHA1
423 checksum is a 160-bit (20-byte) hash value used to check that the
424 image contents have not been corrupted or maliciously altered.
425 While SHA1 is fairly secure it is coming to the end of its life
426 due to the expanding computing power available to brute-force
427 attacks. For more security, consider SHA256.
429 config SPL_SHA256_SUPPORT
430 bool "Support SHA256"
434 Enable this to support SHA256 in FIT images within SPL. A SHA256
435 checksum is a 256-bit (32-byte) hash value used to check that the
436 image contents have not been corrupted. SHA256 is recommended for
437 use in secure applications since (as at 2016) there is no known
438 feasible attack that could produce a 'collision' with differing
439 input data. Use this for the highest security. Note that only the
440 SHA256 variant is supported: SHA512 and others are not currently
443 config SPL_FIT_IMAGE_TINY
444 bool "Remove functionality from SPL FIT loading to reduce size"
446 default y if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN50I_H6
447 default y if ARCH_IMX8M
449 Enable this to reduce the size of the FIT image loading code
450 in SPL, if space for the SPL binary is very tight.
452 This removes the detection of image types (which forces the
453 first image to be treated as having a U-Boot style calling
454 convention) and skips the recording of each loaded payload
455 (i.e. loadable) into the FDT (modifying the loaded FDT to
456 ensure this information is available to the next image
459 config SPL_CACHE_SUPPORT
460 bool "Support CACHE drivers"
462 Enable CACHE drivers in SPL. These drivers can keep data so that
463 future requests for that data can be served faster. Enable this option
464 to build the drivers in drivers/cache as part of an SPL build.
466 config SPL_CPU_SUPPORT
467 bool "Support CPU drivers"
469 Enable this to support CPU drivers in SPL. These drivers can set
470 up CPUs and provide information about them such as the model and
471 name. This can be useful in SPL since setting up the CPUs earlier
472 may improve boot performance. Enable this option to build the
473 drivers in drivers/cpu as part of an SPL build.
475 config SPL_CRYPTO_SUPPORT
476 bool "Support crypto drivers"
478 Enable crypto drivers in SPL. These drivers can be used to
479 accelerate secure boot processing in secure applications. Enable
480 this option to build the drivers in drivers/crypto as part of an
483 config SPL_HASH_SUPPORT
484 bool "Support hashing drivers"
488 Enable hashing drivers in SPL. These drivers can be used to
489 accelerate secure boot processing in secure applications. Enable
490 this option to build system-specific drivers for hash acceleration
491 as part of an SPL build.
493 config TPL_HASH_SUPPORT
494 bool "Support hashing drivers in TPL"
499 Enable hashing drivers in SPL. These drivers can be used to
500 accelerate secure boot processing in secure applications. Enable
501 this option to build system-specific drivers for hash acceleration
502 as part of an SPL build.
505 bool "Support DMA drivers"
507 Enable DMA (direct-memory-access) drivers in SPL. These drivers
508 can be used to handle memory-to-peripheral data transfer without
509 the CPU moving the data. Enable this option to build the drivers
510 in drivers/dma as part of an SPL build.
512 config SPL_DRIVERS_MISC_SUPPORT
513 bool "Support misc drivers"
515 Enable miscellaneous drivers in SPL. These drivers perform various
516 tasks that don't fall nicely into other categories, Enable this
517 option to build the drivers in drivers/misc as part of an SPL
518 build, for those that support building in SPL (not all drivers do).
520 config SPL_ENV_SUPPORT
521 bool "Support an environment"
523 Enable environment support in SPL. The U-Boot environment provides
524 a number of settings (essentially name/value pairs) which can
525 control many aspects of U-Boot's operation. Normally this is not
526 needed in SPL as it has a much simpler task with less
527 configuration. But some boards use this to support 'Falcon' boot
528 on EXT2 and FAT, where SPL boots directly into Linux without
529 starting U-Boot first. Enabling this option will make env_get()
530 and env_set() available in SPL.
533 bool "Support save environment"
534 depends on SPL_ENV_SUPPORT
535 select SPL_MMC_WRITE if ENV_IS_IN_MMC
537 Enable save environment support in SPL after setenv. By default
538 the saveenv option is not provided in SPL, but some boards need
539 this support in 'Falcon' boot, where SPL need to boot from
540 different images based on environment variable set by OS. For
541 example OS may set "reboot_image" environment variable to
542 "recovery" inorder to boot recovery image by SPL. The SPL read
543 "reboot_image" and act accordingly and change the reboot_image
544 to default mode using setenv and save the environment.
546 config SPL_ETH_SUPPORT
547 bool "Support Ethernet"
548 depends on SPL_ENV_SUPPORT
550 Enable access to the network subsystem and associated Ethernet
551 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
552 link rather than from an on-board peripheral. Environment support
553 is required since the network stack uses a number of environment
554 variables. See also SPL_NET_SUPPORT.
557 bool "Support EXT filesystems"
559 Enable support for EXT2/3/4 filesystems with SPL. This permits
560 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
561 filesystem from within SPL. Support for the underlying block
562 device (e.g. MMC or USB) must be enabled separately.
565 bool "Support FAT filesystems"
568 Enable support for FAT and VFAT filesystems with SPL. This
569 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
570 filesystem from within SPL. Support for the underlying block
571 device (e.g. MMC or USB) must be enabled separately.
574 bool "Support write for FAT filesystems"
576 Enable write support for FAT and VFAT filesystems with SPL.
577 Support for the underlying block device (e.g. MMC or USB) must be
580 config SPL_FPGA_SUPPORT
583 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
584 provide software-configurable hardware which is typically used to
585 implement peripherals (such as UARTs, LCD displays, MMC) or
586 accelerate custom processing functions, such as image processing
587 or machine learning. Sometimes it is useful to program the FPGA
588 as early as possible during boot, and this option can enable that
591 config SPL_GPIO_SUPPORT
592 bool "Support GPIO in SPL"
594 Enable support for GPIOs (General-purpose Input/Output) in SPL.
595 GPIOs allow U-Boot to read the state of an input line (high or
596 low) and set the state of an output line. This can be used to
597 drive LEDs, control power to various system parts and read user
598 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
599 for example. Enable this option to build the drivers in
600 drivers/gpio as part of an SPL build.
602 config SPL_I2C_SUPPORT
605 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
606 I2C works with a clock and data line which can be driven by a
607 one or more masters or slaves. It is a fairly complex bus but is
608 widely used as it only needs two lines for communication. Speeds of
609 400kbps are typical but up to 3.4Mbps is supported by some
610 hardware. I2C can be useful in SPL to configure power management
611 ICs (PMICs) before raising the CPU clock speed, for example.
612 Enable this option to build the drivers in drivers/i2c as part of
615 config SPL_LIBCOMMON_SUPPORT
616 bool "Support common libraries"
618 Enable support for common U-Boot libraries within SPL. These
619 libraries include common code to deal with U-Boot images,
620 environment and USB, for example. This option is enabled on many
621 boards. Enable this option to build the code in common/ as part of
624 config SPL_LIBDISK_SUPPORT
625 bool "Support disk partitions"
628 Enable support for disk partitions within SPL. 'Disk' is something
629 of a misnomer as it includes non-spinning media such as flash (as
630 used in MMC and USB sticks). Partitions provide a way for a disk
631 to be split up into separate regions, with a partition table placed
632 at the start or end which describes the location and size of each
633 'partition'. These partitions are typically uses as individual block
634 devices, typically with an EXT2 or FAT filesystem in each. This
635 option enables whatever partition support has been enabled in
636 U-Boot to also be used in SPL. It brings in the code in disk/.
638 config SPL_LIBGENERIC_SUPPORT
639 bool "Support generic libraries"
641 Enable support for generic U-Boot libraries within SPL. These
642 libraries include generic code to deal with device tree, hashing,
643 printf(), compression and the like. This option is enabled on many
644 boards. Enable this option to build the code in lib/ as part of an
647 config SPL_DM_MAILBOX
648 bool "Support Mailbox"
650 Enable support for Mailbox within SPL. This enable the inter
651 processor communication protocols tobe used within SPL. Enable
652 this option to build the drivers in drivers/mailbox as part of
655 config SPL_MMC_SUPPORT
658 select HAVE_BLOCK_DEVICE
660 Enable support for MMC (Multimedia Card) within SPL. This enables
661 the MMC protocol implementation and allows any enabled drivers to
662 be used within SPL. MMC can be used with or without disk partition
663 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
664 this option to build the drivers in drivers/mmc as part of an SPL
668 bool "Tiny MMC framework in SPL"
669 depends on SPL_MMC_SUPPORT
672 Enable MMC framework tinification support. This option is useful if
673 if your SPL is extremely size constrained. Heed the warning, enable
674 this option if and only if you know exactly what you are doing, if
675 you are reading this help text, you most likely have no idea :-)
677 The MMC framework is reduced to bare minimum to be useful. No malloc
678 support is needed for the MMC framework operation with this option
679 enabled. The framework supports exactly one MMC device and exactly
680 one MMC driver. The MMC driver can be adjusted to avoid any malloc
681 operations too, which can remove the need for malloc support in SPL
682 and thus further reduce footprint.
685 bool "MMC/SD/SDIO card support for write operations in SPL"
686 depends on SPL_MMC_SUPPORT
689 Enable write access to MMC and SD Cards in SPL
692 config SPL_MPC8XXX_INIT_DDR_SUPPORT
693 bool "Support MPC8XXX DDR init"
695 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
696 random-access memory) on the MPC8XXX family within SPL. This
697 allows DRAM to be set up before loading U-Boot into that DRAM,
700 config SPL_MTD_SUPPORT
701 bool "Support MTD drivers"
703 Enable support for MTD (Memory Technology Device) within SPL. MTD
704 provides a block interface over raw NAND and can also be used with
705 SPI flash. This allows SPL to load U-Boot from supported MTD
706 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
707 to enable specific MTD drivers.
709 config SPL_MUSB_NEW_SUPPORT
710 bool "Support new Mentor Graphics USB"
712 Enable support for Mentor Graphics USB in SPL. This is a new
713 driver used by some boards. Enable this option to build
714 the drivers in drivers/usb/musb-new as part of an SPL build. The
715 old drivers are in drivers/usb/musb.
717 config SPL_NAND_SUPPORT
718 bool "Support NAND flash"
720 Enable support for NAND (Negative AND) flash in SPL. NAND flash
721 can be used to allow SPL to load U-Boot from supported devices.
722 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
728 Enable support for loading payloads from UBI. See
729 README.ubispl for more info.
734 bool "Support cache drivers in SPL"
736 Enable support for cache drivers in SPL.
739 bool "Support SPI DM drivers in SPL"
741 Enable support for SPI DM drivers in SPL.
745 config SPL_UBI_LOAD_BY_VOLNAME
746 bool "Support loading volumes by name"
748 This enables support for loading UBI volumes by name. When this
749 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
750 configure the volume name from which to load U-Boot.
752 config SPL_UBI_MAX_VOL_LEBS
753 int "Maximum number of LEBs per volume"
756 The maximum number of logical eraseblocks which a static volume
757 to load can contain. Used for sizing the scan data structure.
759 config SPL_UBI_MAX_PEB_SIZE
760 int "Maximum PEB size"
763 The maximum physical erase block size.
765 config SPL_UBI_MAX_PEBS
766 int "Maximum number of PEBs"
769 The maximum physical erase block size. If not overridden by
770 board code, this value will be used as the actual number of PEBs.
772 config SPL_UBI_PEB_OFFSET
773 int "Offset to first UBI PEB"
776 The offset in number of PEBs from the start of flash to the first
777 PEB part of the UBI image.
779 config SPL_UBI_VID_OFFSET
780 int "Offset to VID header"
783 config SPL_UBI_LEB_START
784 int "Offset to LEB in PEB"
787 The offset in bytes to the LEB within a PEB.
789 config SPL_UBI_INFO_ADDR
790 hex "Address to place UBI scan info"
793 Address for ubispl to place the scan info. Read README.ubispl to
794 determine the required size
796 config SPL_UBI_VOL_IDS
797 int "Maximum volume id"
800 The maximum volume id which can be loaded. Used for sizing the
803 config SPL_UBI_LOAD_MONITOR_ID
804 int "id of U-Boot volume"
807 The UBI volume id from which to load U-Boot
809 config SPL_UBI_LOAD_MONITOR_VOLNAME
810 string "volume name of U-Boot volume"
811 depends on SPL_UBI_LOAD_BY_VOLNAME
813 The UBI volume name from which to load U-Boot
815 config SPL_UBI_LOAD_KERNEL_ID
816 int "id of kernel volume"
817 depends on SPL_OS_BOOT && SPL_UBI
819 The UBI volume id from which to load the kernel
821 config SPL_UBI_LOAD_ARGS_ID
822 int "id of kernel args volume"
823 depends on SPL_OS_BOOT && SPL_UBI
825 The UBI volume id from which to load the device tree
827 config UBI_SPL_SILENCE_MSG
828 bool "silence UBI SPL messages"
831 Disable messages from UBI SPL. This leaves warnings
836 config SPL_NET_SUPPORT
837 bool "Support networking"
839 Enable support for network devices (such as Ethernet) in SPL.
840 This permits SPL to load U-Boot over a network link rather than
841 from an on-board peripheral. Environment support is required since
842 the network stack uses a number of environment variables. See also
846 config SPL_NET_VCI_STRING
847 string "BOOTP Vendor Class Identifier string sent by SPL"
849 As defined by RFC 2132 the vendor class identifier field can be
850 sent by the client to identify the vendor type and configuration
851 of a client. This is often used in practice to allow for the DHCP
852 server to specify different files to load depending on if the ROM,
853 SPL or U-Boot itself makes the request
854 endif # if SPL_NET_SUPPORT
856 config SPL_NO_CPU_SUPPORT
857 bool "Drop CPU code in SPL"
859 This is specific to the ARM926EJ-S CPU. It disables the standard
860 start.S start-up code, presumably so that a replacement can be
861 used on that CPU. You should not enable it unless you know what
864 config SPL_NOR_SUPPORT
865 bool "Support NOR flash"
867 Enable support for loading U-Boot from memory-mapped NOR (Negative
868 OR) flash in SPL. NOR flash is slow to write but fast to read, and
869 a memory-mapped device makes it very easy to access. Loading from
870 NOR is typically achieved with just a memcpy().
872 config SPL_XIP_SUPPORT
876 Enable support for execute in place of U-Boot or kernel image. There
877 is no need to copy image from flash to ram if flash supports execute
878 in place. Its very useful in systems having enough flash but not
879 enough ram to load the image.
881 config SPL_ONENAND_SUPPORT
882 bool "Support OneNAND flash"
884 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
885 a type of NAND flash and therefore can be used to allow SPL to
886 load U-Boot from supported devices. This enables the drivers in
887 drivers/mtd/onenand as part of an SPL build.
890 bool "Activate Falcon Mode"
891 depends on !TI_SECURE_DEVICE
894 Enable booting directly to an OS from SPL.
895 for more info read doc/README.falcon
899 hex "addr, where OS is found"
900 depends on SPL_NOR_SUPPORT
902 Specify the address, where the OS image is found, which
909 default "tpl/u-boot-with-tpl.bin" if TPL
912 Payload for SPL boot. For backward compatibility, default to
913 u-boot.bin, i.e. RAW image without any header. In case of
914 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
918 bool "Support PCI drivers"
920 Enable support for PCI in SPL. For platforms that need PCI to boot,
921 or must perform some init using PCI in SPL, this provides the
922 necessary driver support. This enables the drivers in drivers/pci
923 as part of an SPL build.
925 config SPL_PCH_SUPPORT
926 bool "Support PCH drivers"
928 Enable support for PCH (Platform Controller Hub) devices in SPL.
929 These are used to set up GPIOs and the SPI peripheral early in
930 boot. This enables the drivers in drivers/pch as part of an SPL
933 config SPL_POST_MEM_SUPPORT
934 bool "Support POST drivers"
936 Enable support for POST (Power-on Self Test) in SPL. POST is a
937 procedure that checks that the hardware (CPU or board) appears to
938 be functionally correctly. It is a sanity check that can be
939 performed before booting. This enables the drivers in post/drivers
940 as part of an SPL build.
943 bool "Support reset drivers"
946 Enable support for reset control in SPL.
947 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
948 by using the generic reset API provided by driver model.
949 This enables the drivers in drivers/reset as part of an SPL build.
951 config SPL_POWER_SUPPORT
952 bool "Support power drivers"
954 Enable support for power control in SPL. This includes support
955 for PMICs (Power-management Integrated Circuits) and some of the
956 features provided by PMICs. In particular, voltage regulators can
957 be used to enable/disable power and vary its voltage. That can be
958 useful in SPL to turn on boot peripherals and adjust CPU voltage
959 so that the clock speed can be increased. This enables the drivers
960 in drivers/power, drivers/power/pmic and drivers/power/regulator
961 as part of an SPL build.
963 config SPL_POWER_DOMAIN
964 bool "Support power domain drivers"
966 Enable support for power domain control in SPL. Many SoCs allow
967 power to be applied to or removed from portions of the SoC (power
968 domains). This may be used to save power. This API provides the
969 means to control such power management hardware. This enables
970 the drivers in drivers/power/domain as part of a SPL build.
972 config SPL_RAM_SUPPORT
973 bool "Support booting from RAM"
974 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
976 Enable booting of an image in RAM. The image can be preloaded or
977 it can be loaded by SPL directly into RAM (e.g. using USB).
979 config SPL_RAM_DEVICE
980 bool "Support booting from preloaded image in RAM"
981 depends on SPL_RAM_SUPPORT
982 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
984 Enable booting of an image already loaded in RAM. The image has to
985 be already in memory when SPL takes over, e.g. loaded by the boot
988 config SPL_REMOTEPROC
989 bool "Support REMOTEPROCS"
991 Enable support for REMOTEPROCs in SPL. This permits to load
992 a remote processor firmware in SPL.
994 config SPL_RTC_SUPPORT
995 bool "Support RTC drivers"
997 Enable RTC (Real-time Clock) support in SPL. This includes support
998 for reading and setting the time. Some RTC devices also have some
999 non-volatile (battery-backed) memory which is accessible if
1000 needed. This enables the drivers in drivers/rtc as part of an SPL
1003 config SPL_SATA_SUPPORT
1004 bool "Support loading from SATA"
1006 Enable support for SATA (Serial AT attachment) in SPL. This allows
1007 use of SATA devices such as hard drives and flash drivers for
1008 loading U-Boot. SATA is used in higher-end embedded systems and
1009 can provide higher performance than MMC , at somewhat higher
1010 expense and power consumption. This enables loading from SATA
1011 using a configured device.
1013 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1014 bool "SATA raw mode: by sector"
1015 depends on SPL_SATA_SUPPORT
1017 Use sector number for specifying U-Boot location on SATA disk in
1020 config SPL_SATA_RAW_U_BOOT_SECTOR
1021 hex "Sector on the SATA disk to load U-Boot from"
1022 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1024 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1025 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1027 config SPL_SERIAL_SUPPORT
1028 bool "Support serial"
1032 Enable support for serial in SPL. This allows use of a serial UART
1033 for displaying messages while SPL is running. It also brings in
1034 printf() and panic() functions. This should normally be enabled
1035 unless there are space reasons not to. Even then, consider
1036 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1038 config SPL_SPI_SUPPORT
1039 bool "Support SPI drivers"
1041 Enable support for using SPI in SPL. This is used for connecting
1042 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1043 more details on that. The SPI driver provides the transport for
1044 data between the SPI flash and the CPU. This option can be used to
1045 enable SPI drivers that are needed for other purposes also, such
1048 config SPL_SPI_FLASH_SUPPORT
1049 bool "Support SPI flash drivers"
1050 depends on SPL_SPI_SUPPORT
1052 Enable support for using SPI flash in SPL, and loading U-Boot from
1053 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1054 the SPI bus that is used to connect it to a system. It is a simple
1055 but fast bidirectional 4-wire bus (clock, chip select and two data
1056 lines). This enables the drivers in drivers/mtd/spi as part of an
1057 SPL build. This normally requires SPL_SPI_SUPPORT.
1059 if SPL_SPI_FLASH_SUPPORT
1061 config SPL_SPI_FLASH_TINY
1062 bool "Enable low footprint SPL SPI Flash support"
1063 depends on !SPI_FLASH_BAR
1064 default y if SPI_FLASH
1066 Enable lightweight SPL SPI Flash support that supports just reading
1067 data/images from flash. No support to write/erase flash. Enable
1068 this if you have SPL size limitations and don't need full
1069 fledged SPI flash support.
1071 config SPL_SPI_FLASH_SFDP_SUPPORT
1072 bool "SFDP table parsing support for SPI NOR flashes"
1073 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1075 Enable support for parsing and auto discovery of parameters for
1076 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1077 tables as per JESD216 standard in SPL.
1080 bool "Support loading from SPI flash"
1082 Enable support for loading next stage, U-Boot or otherwise, from
1083 SPI NOR in U-Boot SPL.
1085 endif # SPL_SPI_FLASH_SUPPORT
1087 config SYS_SPI_U_BOOT_OFFS
1088 hex "address of u-boot payload in SPI flash"
1089 default 0x8000 if ARCH_SUNXI
1091 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1093 Address within SPI-Flash from where the u-boot payload is fetched
1097 bool "Driver support for thermal devices"
1099 Enable support for temperature-sensing devices. Some SoCs have on-chip
1100 temperature sensors to permit warnings, speed throttling or even
1101 automatic power-off when the temperature gets too high or low. Other
1102 devices may be discrete but connected on a suitable bus.
1104 config SPL_USB_HOST_SUPPORT
1105 bool "Support USB host drivers"
1106 select HAVE_BLOCK_DEVICE
1108 Enable access to USB (Universal Serial Bus) host devices so that
1109 SPL can load U-Boot from a connected USB peripheral, such as a USB
1110 flash stick. While USB takes a little longer to start up than most
1111 buses, it is very flexible since many different types of storage
1112 device can be attached. This option enables the drivers in
1113 drivers/usb/host as part of an SPL build.
1115 config SPL_USB_STORAGE
1116 bool "Support loading from USB"
1117 depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
1119 Enable support for USB devices in SPL. This allows use of USB
1120 devices such as hard drives and flash drivers for loading U-Boot.
1121 The actual drivers are enabled separately using the normal U-Boot
1122 config options. This enables loading from USB using a configured
1125 config SPL_USB_GADGET
1126 bool "Suppport USB Gadget drivers"
1128 Enable USB Gadget API which allows to enable USB device functions
1133 config SPL_USB_ETHER
1134 bool "Support USB Ethernet drivers"
1136 Enable access to the USB network subsystem and associated
1137 drivers in SPL. This permits SPL to load U-Boot over a
1138 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1139 than from an onboard peripheral. Environment support is required
1140 since the network stack uses a number of environment variables.
1141 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
1144 bool "Support DFU (Device Firmware Upgrade)"
1145 select SPL_HASH_SUPPORT
1146 select SPL_DFU_NO_RESET
1147 depends on SPL_RAM_SUPPORT
1149 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1150 RAM memory device support. The ROM code will load and execute
1151 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1152 selected device partition from host-pc using dfu-utils.
1153 This feature is useful to flash the binaries to factory or bare-metal
1154 boards using USB interface.
1157 bool "DFU device selection"
1162 depends on SPL_DFU && SPL_RAM_SUPPORT
1164 select RAM/DDR memory device for loading binary images
1165 (u-boot/kernel) to the selected device partition using
1166 DFU and execute the u-boot/kernel from RAM.
1170 config SPL_USB_SDP_SUPPORT
1171 bool "Support SDP (Serial Download Protocol)"
1173 Enable Serial Download Protocol (SDP) device support in SPL. This
1174 allows to download images into memory and execute (jump to) them
1175 using the same protocol as implemented by the i.MX family's boot ROM.
1177 config SPL_SDP_USB_DEV
1178 int "SDP USB controller index"
1180 depends on SPL_USB_SDP_SUPPORT
1182 Some boards have USB controller other than 0. Define this option
1183 so it can be used in compiled environment.
1186 config SPL_WATCHDOG_SUPPORT
1187 bool "Support watchdog drivers"
1188 imply SPL_WDT if !HW_WATCHDOG
1190 Enable support for watchdog drivers in SPL. A watchdog is
1191 typically a hardware peripheral which can reset the system when it
1192 detects no activity for a while (such as a software crash). This
1193 enables the drivers in drivers/watchdog as part of an SPL build.
1195 config SPL_YMODEM_SUPPORT
1196 bool "Support loading using Ymodem"
1197 depends on SPL_SERIAL_SUPPORT
1199 While loading from serial is slow it can be a useful backup when
1200 there is no other option. The Ymodem protocol provides a reliable
1201 means of transmitting U-Boot over a serial line for using in SPL,
1202 with a checksum to ensure correctness.
1205 bool "Support ARM Trusted Firmware"
1208 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1209 is loaded by SPL (which is considered as BL2 in ATF terminology).
1210 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1212 config SPL_ATF_NO_PLATFORM_PARAM
1213 bool "Pass no platform parameter"
1216 While we expect to call a pointer to a valid FDT (or NULL)
1217 as the platform parameter to an ATF, some ATF versions are
1218 not U-Boot aware and have an insufficiently robust parameter
1219 validation to gracefully reject a FDT being passed.
1221 If this option is enabled, the spl_atf os-type handler will
1222 always pass NULL for the platform parameter.
1224 If your ATF is affected, say Y.
1226 config SPL_AM33XX_ENABLE_RTC32K_OSC
1227 bool "Enable the RTC32K OSC on AM33xx based platforms"
1230 Enable access to the AM33xx RTC and select the external 32kHz clock
1234 bool "Support OP-TEE Trusted OS"
1237 OP-TEE is an open source Trusted OS which is loaded by SPL.
1238 More detail at: https://github.com/OP-TEE/optee_os
1241 bool "Support RISC-V OpenSBI"
1242 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1244 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1245 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1246 firmware. It is loaded and started by U-Boot SPL.
1248 More details are available at https://github.com/riscv/opensbi and
1249 https://github.com/riscv/riscv-sbi-doc
1251 config SPL_OPENSBI_LOAD_ADDR
1252 hex "OpenSBI load address"
1253 depends on SPL_OPENSBI
1255 Load address of the OpenSBI binary.
1259 depends on SUPPORT_TPL
1262 If you want to build TPL as well as the normal image and SPL, say Y.
1266 config TPL_SIZE_LIMIT
1267 hex "Maximum size of TPL image"
1271 Specifies the maximum length of the U-Boot TPL image.
1272 If this value is zero, it is ignored.
1274 config TPL_FRAMEWORK
1275 bool "Support TPL based upon the common SPL framework"
1276 default y if SPL_FRAMEWORK
1278 Enable the SPL framework under common/spl/ for TPL builds.
1279 This framework supports MMC, NAND and YMODEM and other methods
1280 loading of U-Boot's SPL stage. If unsure, say Y.
1283 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1284 depends on HANDOFF && TPL_BLOBLIST
1287 This option enables TPL to write handoff information. This can be
1288 used to pass information like the size of SDRAM from TPL to U-Boot
1289 proper. The information is also available to SPL if it is useful
1292 config TPL_BOARD_INIT
1293 bool "Call board-specific initialization in TPL"
1295 If this option is enabled, U-Boot will call the function
1296 spl_board_init() from board_init_r(). This function should be
1297 provided by the board.
1300 string "Linker script for the TPL stage"
1302 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1303 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1305 The TPL stage will usually require a different linker-script
1306 (as it runs from a different memory region) than the regular
1307 U-Boot stage. Set this to the path of the linker-script to
1310 May be left empty to trigger the Makefile infrastructure to
1311 fall back to the linker-script used for the SPL stage.
1313 config TPL_NEEDS_SEPARATE_TEXT_BASE
1314 bool "TPL needs a separate text-base"
1318 Enable, if the TPL stage should not inherit its text-base
1319 from the SPL stage. When enabled, a base address for the
1320 .text sections of the TPL stage has to be set below.
1322 config TPL_NEEDS_SEPARATE_STACK
1323 bool "TPL needs a separate initial stack-pointer"
1327 Enable, if the TPL stage should not inherit its initial
1328 stack-pointer from the settings for the SPL stage.
1330 config TPL_TEXT_BASE
1331 hex "Base address for the .text section of the TPL stage"
1332 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1334 The base address for the .text section of the TPL stage.
1337 int "Maximum size (in bytes) for the TPL stage"
1341 The maximum size (in bytes) of the TPL stage.
1344 hex "Address of the initial stack-pointer for the TPL stage"
1345 depends on TPL_NEEDS_SEPARATE_STACK
1347 The address of the initial stack-pointer for the TPL stage.
1348 Usually this will be the (aligned) top-of-stack.
1350 config TPL_BOOTROM_SUPPORT
1351 bool "Support returning to the BOOTROM (from TPL)"
1353 Some platforms (e.g. the Rockchip RK3368) provide support in their
1354 ROM for loading the next boot-stage after performing basic setup
1357 Enable this option, to return to the BOOTROM through the
1358 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1359 boot device list, if not implemented for a given board)
1361 config TPL_DRIVERS_MISC_SUPPORT
1362 bool "Support misc drivers in TPL"
1364 Enable miscellaneous drivers in TPL. These drivers perform various
1365 tasks that don't fall nicely into other categories, Enable this
1366 option to build the drivers in drivers/misc as part of an TPL
1367 build, for those that support building in TPL (not all drivers do).
1369 config TPL_ENV_SUPPORT
1370 bool "Support an environment"
1372 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1374 config TPL_GPIO_SUPPORT
1375 bool "Support GPIO in TPL"
1377 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1378 GPIOs allow U-Boot to read the state of an input line (high or
1379 low) and set the state of an output line. This can be used to
1380 drive LEDs, control power to various system parts and read user
1381 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1382 for example. Enable this option to build the drivers in
1383 drivers/gpio as part of an TPL build.
1385 config TPL_I2C_SUPPORT
1388 Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
1391 config TPL_LIBCOMMON_SUPPORT
1392 bool "Support common libraries"
1394 Enable support for common U-Boot libraries within TPL. See
1395 SPL_LIBCOMMON_SUPPORT for details.
1397 config TPL_LIBGENERIC_SUPPORT
1398 bool "Support generic libraries"
1400 Enable support for generic U-Boot libraries within TPL. See
1401 SPL_LIBGENERIC_SUPPORT for details.
1403 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1404 bool "Support MPC8XXX DDR init"
1406 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1407 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1409 config TPL_MMC_SUPPORT
1413 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1415 config TPL_NAND_SUPPORT
1416 bool "Support NAND flash"
1418 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1421 bool "Support PCI drivers"
1423 Enable support for PCI in TPL. For platforms that need PCI to boot,
1424 or must perform some init using PCI in SPL, this provides the
1425 necessary driver support. This enables the drivers in drivers/pci
1426 as part of a TPL build.
1428 config TPL_PCH_SUPPORT
1429 bool "Support PCH drivers"
1431 Enable support for PCH (Platform Controller Hub) devices in TPL.
1432 These are used to set up GPIOs and the SPI peripheral early in
1433 boot. This enables the drivers in drivers/pch as part of a TPL
1436 config TPL_RAM_SUPPORT
1437 bool "Support booting from RAM"
1439 Enable booting of an image in RAM. The image can be preloaded or
1440 it can be loaded by TPL directly into RAM (e.g. using USB).
1442 config TPL_RAM_DEVICE
1443 bool "Support booting from preloaded image in RAM"
1444 depends on TPL_RAM_SUPPORT
1446 Enable booting of an image already loaded in RAM. The image has to
1447 be already in memory when TPL takes over, e.g. loaded by the boot
1450 config TPL_RTC_SUPPORT
1451 bool "Support RTC drivers"
1453 Enable RTC (Real-time Clock) support in TPL. This includes support
1454 for reading and setting the time. Some RTC devices also have some
1455 non-volatile (battery-backed) memory which is accessible if
1456 needed. This enables the drivers in drivers/rtc as part of an TPL
1459 config TPL_SERIAL_SUPPORT
1460 bool "Support serial"
1464 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1467 config TPL_SPI_FLASH_SUPPORT
1468 bool "Support SPI flash drivers"
1470 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1474 bool "Support loading from SPI flash"
1475 depends on TPL_SPI_FLASH_SUPPORT
1477 Enable support for loading next stage, U-Boot or otherwise, from
1478 SPI NOR in U-Boot TPL.
1480 config TPL_SPI_SUPPORT
1481 bool "Support SPI drivers"
1483 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1486 config TPL_YMODEM_SUPPORT
1487 bool "Support loading using Ymodem"
1488 depends on TPL_SERIAL_SUPPORT
1490 While loading from serial is slow it can be a useful backup when
1491 there is no other option. The Ymodem protocol provides a reliable
1492 means of transmitting U-Boot over a serial line for using in TPL,
1493 with a checksum to ensure correctness.
1497 config SPL_AT91_MCK_BYPASS
1498 bool "Use external clock signal as a source of main clock for AT91 platforms"
1499 depends on ARCH_AT91
1502 Use external 8 to 24 Mhz clock signal as source of main clock instead
1503 of an external crystal oscillator.
1504 This option disables the internal driving on the XOUT pin.
1505 The external source has to provide a stable clock on the XIN pin.
1506 If this option is disabled, the SoC expects a crystal oscillator
1507 that needs driving on both XIN and XOUT lines.