10 config SPL_DFU_NO_RESET
15 depends on SUPPORT_SPL
17 If you want to build SPL as well as the normal image, say Y.
19 menu "SPL configuration options"
23 bool "Support SPL based upon the common SPL framework"
26 Enable the SPL framework under common/spl/. This framework
27 supports MMC, NAND and YMODEM and other methods loading of U-Boot
28 and the Linux Kernel. If unsure, say Y.
30 config SPL_FRAMEWORK_BOARD_INIT_F
31 bool "Define a generic function board_init_f"
32 depends on SPL_FRAMEWORK
34 Define a generic function board_init_f that:
35 - initialize the spl (spl_early_init)
36 - initialize the serial (preloader_console_init)
37 Unless you want to provide your own board_init_f, you should say Y.
40 hex "Maximum size of SPL image"
41 default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
42 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
43 default 0x30000 if ARCH_MVEBU && ARMADA_32BIT
46 Specifies the maximum length of the U-Boot SPL image.
47 If this value is zero, it is ignored.
49 config SPL_SIZE_LIMIT_SUBTRACT_GD
50 bool "SPL image size check: provide space for global data"
51 depends on SPL_SIZE_LIMIT > 0
53 If enabled, aligned size of global data is reserved in
54 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
55 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
56 pre-reloc global data is put into this SRAM, too.
58 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
59 bool "SPL image size check: provide space for malloc() pool before relocation"
60 depends on SPL_SIZE_LIMIT > 0
62 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
63 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
64 describes the size of SRAM available for SPL when pre-reloc malloc
65 pool is put into this SRAM, too.
67 config SPL_SIZE_LIMIT_PROVIDE_STACK
68 hex "SPL image size check: provide stack space before relocation"
69 depends on SPL_SIZE_LIMIT > 0
72 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
73 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
74 of SRAM available for SPL when the stack required before reolcation
78 hex "Maximum size of the SPL image, excluding BSS"
79 default 0x30000 if ARCH_MX6 && MX6_OCRAM_256KB
80 default 0x1b000 if AM33XX && !TI_SECURE_DEVICE
81 default 0x10000 if ARCH_MX6 && !MX6_OCRAM_256KB
82 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x10000
83 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x20000 && !MACH_SUN50I_H616
84 default 0xbfa0 if MACH_SUN50I_H616
85 default 0x7000 if RCAR_GEN3
86 default 0x5fa0 if SUNXI_SRAM_ADDRESS = 0x0
87 default 0x10000 if ASPEED_AST2600
88 default 0x27000 if IMX8MM && SPL_TEXT_BASE = 0x7E1000
91 Maximum size of the SPL image (text, data, rodata, and linker lists
92 sections), BSS excluded. When defined, the linker checks that the
93 actual size does not exceed it.
96 hex "Offset to which the SPL should be padded before appending the SPL payload"
97 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
98 default 0x11000 if ARCH_MX7 || (ARCH_MX6 && !MX6_OCRAM_256KB)
99 default 0x10000 if ARCH_KEYSTONE
100 default 0x8000 if ARCH_SUNXI && !MACH_SUN50I_H616
101 default 0x0 if ARCH_MTMIPS
102 default TPL_MAX_SIZE if TPL_MAX_SIZE > SPL_MAX_SIZE
105 Image offset to which the SPL should be padded before appending the
106 SPL payload. By default, this is defined as CONFIG_SPL_MAX_SIZE, or 0 if
107 CONFIG_SPL_MAX_SIZE is undefined. CONFIG_SPL_PAD_TO must be either
108 0, meaning to append the SPL payload without any padding, or >=
111 config SPL_HAS_BSS_LINKER_SECTION
112 depends on SPL_FRAMEWORK
113 bool "Use a specific address for the BSS via the linker script"
114 default y if ARCH_SUNXI || ARCH_MX6 || ARCH_OMAP2PLUS || MIPS || RISCV || ARCH_ZYNQMP
116 config SPL_BSS_START_ADDR
117 hex "Link address for the BSS within the SPL binary"
118 depends on SPL_HAS_BSS_LINKER_SECTION
119 default 0x88200000 if (ARCH_MX6 && (MX6SX || MX6SL || MX6UL || MX6ULL)) || ARCH_MX7
120 default 0x18200000 if ARCH_MX6 && !(MX6SX || MX6SL || MX6UL || MX6ULL)
121 default 0x80a00000 if ARCH_OMAP2PLUS
122 default 0x81f80000 if ARCH_SUNXI && MACH_SUNIV
123 default 0x4ff80000 if ARCH_SUNXI && !(MACH_SUN9I || MACH_SUNIV)
124 default 0x2ff80000 if ARCH_SUNXI && MACH_SUN9I
125 default 0x1000 if ARCH_ZYNQMP
128 prompt "Enforce SPL BSS limit"
130 default SPL_BSS_LIMIT
132 In some platforms we only want to enforce a limit on the size of the
133 BSS in memory. On other platforms we need to enforce a limit on the
134 whole of the memory allocation as we're strictly limited to a small
135 typically non-DRAM location. Finally, other platforms do not enforce
136 a memory limit within SPL.
138 config SPL_NO_BSS_LIMIT
139 bool "Do not enforce a build time limit on the size of the BSS"
142 bool "Enforce a limit on the size of the BSS only"
144 config SPL_FOOTPRINT_LIMIT
145 bool "Enforce a limit on the whole of memory allocated to SPL, BSS included"
149 config SPL_BSS_MAX_SIZE
150 hex "Maximum size in memory allocated to the SPL BSS"
151 depends on SPL_BSS_LIMIT
152 default 0x100000 if ARCH_MX6 || RISCV
153 default 0x80000 if ARCH_OMAP2PLUS || ARCH_SUNXI
155 When non-zero, the linker checks that the actual memory used by SPL
156 from __bss_start to __bss_end does not exceed it.
158 config SPL_MAX_FOOTPRINT
159 hex "Maximum size in memory allocated to the SPL, BSS included"
160 depends on SPL_FOOTPRINT_LIMIT
162 When non-zero, the linker checks that the actual memory used by SPL
163 from _start to __bss_end does not exceed it.
165 config SPL_SYS_STACK_F_CHECK_BYTE
169 Constant used to check the stack
171 config SPL_SYS_REPORT_STACK_F_USAGE
172 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
173 bool "Check and report stack usage in SPL before relocation"
175 If this option is enabled, the initial SPL stack is filled with 0xaa
176 very early, up to the size configured with
177 SPL_SIZE_LIMIT_PROVIDE_STACK.
178 Later when SPL is done using this initial stack and switches to a
179 stack in DRAM, the actually used size of this initial stack is
180 reported by examining the memory and searching for the lowest
181 occurrence of non 0xaa bytes.
182 This default implementation works for stacks growing down only.
184 config SPL_SHOW_ERRORS
185 bool "Show more information when something goes wrong"
187 This enabled more verbose error messages and checking when something
188 goes wrong in SPL. For example, it shows the error code when U-Boot
189 cannot be located. This can help to diagnose the problem and figure
190 out a fix, particularly during development.
192 This adds a small amount to SPL code size, perhaps 100 bytes.
194 config SPL_BINMAN_SYMBOLS
195 bool "Declare binman symbols in SPL"
196 depends on SPL_FRAMEWORK && BINMAN
199 This enables use of symbols in SPL which refer to other entries in
200 the same binman image as the SPL. These can be declared with the
201 binman_sym_declare(type, entry, prop) macro and accessed by the
202 binman_sym(type, entry, prop) macro defined in binman_sym.h.
204 See tools/binman/binman.rst for a detailed explanation.
206 config SPL_BINMAN_UBOOT_SYMBOLS
207 bool "Declare binman symbols for U-Boot phases in SPL"
208 depends on SPL_BINMAN_SYMBOLS
209 default n if ARCH_IMX8M
212 This enables use of symbols in SPL which refer to U-Boot phases,
213 enabling SPL to obtain the location and size of its next phase simply
214 by calling spl_get_image_pos() and spl_get_image_size().
216 For this to work, you must have all U-Boot phases in the same binman
217 image, so binman can update SPL with the locations of everything.
219 source "common/spl/Kconfig.nxp"
222 bool "Pass hand-off information from SPL to U-Boot proper"
225 It is useful to be able to pass information from SPL to U-Boot
226 proper to preserve state that is known in SPL and is needed in U-Boot.
227 Enable this to locate the handoff information in U-Boot proper, early
228 in boot. It is available in gd->handoff. The state state is set up
229 in SPL (or TPL if that is being used).
232 bool "Pass hand-off information from SPL to U-Boot proper"
233 depends on HANDOFF && SPL_BLOBLIST
236 This option enables SPL to write handoff information. This can be
237 used to pass information like the size of SDRAM from SPL to U-Boot
238 proper. Also SPL can receive information from TPL in the same place
242 string "Linker script for the SPL stage"
243 default "arch/arm/cpu/arm926ejs/sunxi/u-boot-spl.lds" if MACH_SUNIV
244 default "arch/arm/cpu/armv7/sunxi/u-boot-spl.lds" if ARCH_SUNXI && !MACH_SUNIV && !ARM64
245 default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
246 default "arch/arm/cpu/arm1136/u-boot-spl.lds" if CPU_ARM1136
247 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARCH_LS1043A || ARCH_LS1046A || ARCH_LS2080A
248 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
249 default "arch/arm/mach-at91/arm926ejs/u-boot-spl.lds" if ARCH_AT91 && CPU_ARM926EJS
250 default "arch/arm/mach-at91/armv7/u-boot-spl.lds" if ARCH_AT91 && CPU_V7A
251 default "arch/arm/mach-omap2/u-boot-spl.lds" if ARCH_MX6 || ARCH_OMAP2PLUS || (ARCH_K3 && !ARM64)
252 default "arch/arm/mach-zynq/u-boot-spl.lds" if ARCH_ZYNQ
253 default "board/samsung/common/exynos-uboot-spl.lds" if ARCH_EXYNOS5 || ARCH_EXYNOS4
254 default "board/davinci/da8xxevm/u-boot-spl-da850evm.lds" if ARCH_DAVINCI
255 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
257 The SPL stage will usually require a different linker-script
258 (as it runs from a different memory region) than the regular
259 U-Boot stage. Set this to the path of the linker-script to
264 default 0x402F4000 if AM43XX
265 default 0x402F0400 if AM33XX
266 default 0x40301350 if OMAP54XX
267 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
268 default 0x20060 if SUN50I_GEN_H6
269 default 0x00060 if ARCH_SUNXI
270 default 0xfffc0000 if ARCH_ZYNQMP
273 The address in memory that SPL will be running from.
275 config SPL_BOARD_INIT
276 bool "Call board-specific initialization in SPL"
278 If this option is enabled, U-Boot will call the function
279 spl_board_init() from board_init_r(). This function should be
280 provided by the board.
282 config SPL_BOOTROM_SUPPORT
283 bool "Support returning to the BOOTROM"
285 Some platforms (e.g. the Rockchip RK3368) provide support in their
286 ROM for loading the next boot-stage after performing basic setup
289 Enable this option, to return to the BOOTROM through the
290 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
291 boot device list, if not implemented for a given board)
293 config SPL_BOOTCOUNT_LIMIT
294 bool "Support bootcount in SPL"
295 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
297 On some boards, which use 'falcon' mode, it is necessary to check
298 and increment the number of boot attempts. Such boards do not
299 use proper U-Boot for normal boot flow and hence needs those
300 adjustments to be done in the SPL.
302 config SPL_RAW_IMAGE_SUPPORT
303 bool "Support SPL loading and booting of RAW images"
304 default n if ARCH_MVEBU
305 default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
307 depends on !TI_SECURE_DEVICE
309 SPL will support loading and booting a RAW image when this option
310 is y. If this is not set, SPL will move on to other available
311 boot media to find a suitable image.
313 config SPL_LEGACY_IMAGE_FORMAT
314 bool "Support SPL loading and booting of Legacy images"
315 default n if ARCH_MVEBU
316 default y if !SPL_LOAD_FIT
317 depends on !TI_SECURE_DEVICE
319 SPL will support loading and booting Legacy images when this option
320 is y. If this is not set, SPL will move on to other available
321 boot media to find a suitable image.
323 config SPL_LEGACY_IMAGE_CRC_CHECK
324 bool "Check CRC of Legacy images"
325 depends on SPL_LEGACY_IMAGE_FORMAT
328 Enable this to check the CRC of Legacy images. While this increases
329 reliability, it affects both code size and boot duration.
330 If disabled, Legacy images are booted if the image magic and size
331 are correct, without further integrity checks.
333 config SPL_SYS_MALLOC_SIMPLE
334 bool "Only use malloc_simple functions in the SPL"
336 Say Y here to only use the *_simple malloc functions from
337 malloc_simple.c, rather then using the versions from dlmalloc.c;
338 this will make the SPL binary smaller at the cost of more heap
339 usage as the *_simple malloc functions do not re-use free-ed mem.
341 config SPL_SHARES_INIT_SP_ADDR
342 bool "SPL and U-Boot use the same initial stack pointer location"
343 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
344 default n if ARCH_SUNXI || ARCH_MX6 || ARCH_MX7
347 In many cases, we can use the same initial stack pointer address for
348 both SPL and U-Boot itself. If you need to specify a different address
349 however, say N here and then set a different value in CONFIG_SPL_STACK.
352 hex "Initial stack pointer location"
353 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
354 depends on !SPL_SHARES_INIT_SP_ADDR
355 default 0x946bb8 if ARCH_MX7
356 default 0x93ffb8 if ARCH_MX6 && MX6_OCRAM_256KB
357 default 0x91ffb8 if ARCH_MX6 && !MX6_OCRAM_256KB
358 default 0x118000 if MACH_SUN50I_H6
359 default 0x58000 if MACH_SUN50I_H616
360 default 0x54000 if MACH_SUN50I || MACH_SUN50I_H5
361 default 0x18000 if MACH_SUN9I
362 default 0x8000 if ARCH_SUNXI
364 Address of the start of the stack SPL will use before SDRAM is
368 bool "Enable SDRAM location for SPL stack"
370 SPL starts off execution in SRAM and thus typically has only a small
371 stack available. Since SPL sets up DRAM while in its board_init_f()
372 function, it is possible for the stack to move there before
373 board_init_r() is reached. This option enables a special SDRAM
374 location for the SPL stack. U-Boot SPL switches to this after
375 board_init_f() completes, and before board_init_r() starts.
377 config SPL_STACK_R_ADDR
378 depends on SPL_STACK_R
379 hex "SDRAM location for SPL stack"
380 default 0x82000000 if ARCH_OMAP2PLUS
382 Specify the address in SDRAM for the SPL stack. This will be set up
383 before board_init_r() is called.
385 config SPL_STACK_R_MALLOC_SIMPLE_LEN
386 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
387 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
388 default 0x400000 if ARCH_K3 && ARM64
391 Specify the amount of the stack to use as memory pool for
392 malloc_simple after switching the stack to DRAM. This may be set
393 to give board_init_r() a larger heap then the initial heap in
394 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
396 config SPL_SEPARATE_BSS
397 bool "BSS section is in a different memory region from text"
399 Some platforms need a large BSS region in SPL and can provide this
400 because RAM is already set up. In this case BSS can be moved to RAM.
401 This option should then be enabled so that the correct device tree
402 location is used. Normally we put the device tree at the end of BSS
403 but with this option enabled, it goes at _image_binary_end.
405 config SYS_SPL_MALLOC
406 bool "Enable malloc pool in SPL"
407 depends on SPL_FRAMEWORK
409 config HAS_CUSTOM_SPL_MALLOC_START
410 bool "For the SPL malloc pool, define a custom starting address"
411 depends on SYS_SPL_MALLOC
413 config CUSTOM_SYS_SPL_MALLOC_ADDR
414 hex "SPL malloc addr"
415 depends on HAS_CUSTOM_SPL_MALLOC_START
417 config SYS_SPL_MALLOC_SIZE
418 hex "Size of the SPL malloc pool"
419 depends on SYS_SPL_MALLOC
424 depends on SPL_OF_PLATDATA
425 # Bind cannot be supported because the udevice structs are in read-only
426 # memory so we cannot update the linked lists.
427 select SPL_OF_PLATDATA_NO_BIND
428 select SPL_OF_PLATDATA_RT
430 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
431 section of memory. This means that of-platdata must make a copy (in
432 writeable memory) of anything it wants to modify, such as
435 config SPL_BANNER_PRINT
436 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
439 If this option is enabled, SPL will print the banner with version
440 info. Disabling this option could be useful to reduce SPL boot time
441 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
444 depends on ARM && !ARM64
445 bool "Allows initializing BSS early before entering board_init_f"
447 On some platform we have sufficient memory available early on to
448 allow setting up and using a basic BSS prior to entering
449 board_init_f. Activating this option will also de-activate the
450 clearing of BSS during the SPL relocation process, thus allowing
451 to carry state from board_init_f to board_init_r by way of BSS.
453 config SPL_DISPLAY_PRINT
454 bool "Display a board-specific message in SPL"
456 If this option is enabled, U-Boot will call the function
457 spl_display_print() immediately after displaying the SPL console
458 banner ("U-Boot SPL ..."). This function should be provided by
461 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
462 bool "MMC raw mode: by sector"
463 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
464 ARCH_MX6 || ARCH_MX7 || \
465 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
466 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
467 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
468 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
470 Use sector number for specifying U-Boot location on MMC/SD in
473 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
474 hex "Address on the MMC to load U-Boot from"
475 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
476 default 0x40 if ARCH_SUNXI
477 default 0x75 if ARCH_DAVINCI
478 default 0x8a if ARCH_MX6 || ARCH_MX7
479 default 0x100 if ARCH_UNIPHIER
480 default 0x0 if ARCH_MVEBU
481 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
482 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
483 OMAP54XX || AM33XX || AM43XX || ARCH_K3
484 default 0x4000 if ARCH_ROCKCHIP
485 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
487 Address on the MMC to load U-Boot from, when the MMC is being used
488 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
490 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
491 hex "U-Boot main hardware partition image offset"
492 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
493 default 0x10 if ARCH_SUNXI
496 On some platforms SPL location depends on hardware partition. The ROM
497 code skips the MBR sector when loading SPL from main hardware data
498 partition. This adds offset to the main U-Boot image. Set this symbol
499 to the number of skipped sectors.
501 If unsure, leave the default.
503 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
504 bool "MMC Raw mode: by partition"
506 Use a partition for loading U-Boot when using MMC/SD in raw mode.
508 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
509 hex "Partition to use to load U-Boot from"
510 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
513 Partition on the MMC to load U-Boot from when the MMC is being
516 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
517 bool "MMC raw mode: by partition type"
518 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
520 Use partition type for specifying U-Boot partition on MMC/SD in
521 raw mode. U-Boot will be loaded from the first partition of this
524 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
525 hex "Partition Type on the MMC to load U-Boot from"
526 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
528 Partition Type on the MMC to load U-Boot from, when the MMC is being
531 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
532 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
533 depends on SUPPORT_EMMC_BOOT
535 eMMC boot partition is normally configured by the bits of the EXT_CSD
536 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
537 cases it might be required in SPL to load the image from different
538 partition than the partition selected by EXT_CSC_PART_CONFIG register.
539 Enable this option if you intend to use an eMMC boot partition other
540 then selected via EXT_CSC_PART_CONFIG register and specify the custom
541 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
544 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
545 int "Number of the eMMC boot partition to use"
546 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
549 eMMC boot partition number to use when the eMMC in raw mode and
550 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
551 by user defined partition number.
553 config SPL_FIT_IMAGE_TINY
554 bool "Remove functionality from SPL FIT loading to reduce size"
556 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
557 default y if ARCH_IMX8M || ARCH_IMX9
559 Enable this to reduce the size of the FIT image loading code
560 in SPL, if space for the SPL binary is very tight.
562 This skips the recording of each loaded payload
563 (i.e. loadable) into the FDT (modifying the loaded FDT to
564 ensure this information is available to the next image
568 bool "Support CACHE drivers"
570 Enable CACHE drivers in SPL. These drivers can keep data so that
571 future requests for that data can be served faster. Enable this option
572 to build the drivers in drivers/cache as part of an SPL build.
575 bool "Support CPU drivers"
577 Enable this to support CPU drivers in SPL. These drivers can set
578 up CPUs and provide information about them such as the model and
579 name. This can be useful in SPL since setting up the CPUs earlier
580 may improve boot performance. Enable this option to build the
581 drivers in drivers/cpu as part of an SPL build.
584 bool "Support crypto drivers"
586 Enable crypto drivers in SPL. These drivers can be used to
587 accelerate secure boot processing in secure applications. Enable
588 this option to build the drivers in drivers/crypto as part of an
592 bool "Support DMA drivers"
594 Enable DMA (direct-memory-access) drivers in SPL. These drivers
595 can be used to handle memory-to-peripheral data transfer without
596 the CPU moving the data. Enable this option to build the drivers
597 in drivers/dma as part of an SPL build.
599 config SPL_DRIVERS_MISC
600 bool "Support misc drivers"
602 Enable miscellaneous drivers in SPL. These drivers perform various
603 tasks that don't fall nicely into other categories, Enable this
604 option to build the drivers in drivers/misc as part of an SPL
605 build, for those that support building in SPL (not all drivers do).
607 config SPL_ENV_SUPPORT
608 bool "Support an environment"
610 Enable environment support in SPL. The U-Boot environment provides
611 a number of settings (essentially name/value pairs) which can
612 control many aspects of U-Boot's operation. Normally this is not
613 needed in SPL as it has a much simpler task with less
614 configuration. But some boards use this to support 'Falcon' boot
615 on EXT2 and FAT, where SPL boots directly into Linux without
616 starting U-Boot first. Enabling this option will make env_get()
617 and env_set() available in SPL.
620 bool "Support save environment"
621 depends on SPL_ENV_SUPPORT
622 select SPL_MMC_WRITE if ENV_IS_IN_MMC
624 Enable save environment support in SPL after setenv. By default
625 the saveenv option is not provided in SPL, but some boards need
626 this support in 'Falcon' boot, where SPL need to boot from
627 different images based on environment variable set by OS. For
628 example OS may set "reboot_image" environment variable to
629 "recovery" inorder to boot recovery image by SPL. The SPL read
630 "reboot_image" and act accordingly and change the reboot_image
631 to default mode using setenv and save the environment.
634 bool "Support Ethernet"
635 depends on SPL_ENV_SUPPORT
638 Enable access to the network subsystem and associated Ethernet
639 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
640 link rather than from an on-board peripheral. Environment support
641 is required since the network stack uses a number of environment
642 variables. See also SPL_NET.
645 bool "Support EXT filesystems"
647 Enable support for EXT2/3/4 filesystems with SPL. This permits
648 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
649 filesystem from within SPL. Support for the underlying block
650 device (e.g. MMC or USB) must be enabled separately.
652 config SPL_FS_SQUASHFS
653 bool "Support SquashFS filesystems"
656 Enable support for SquashFS filesystems with SPL. This permits
657 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
658 filesystem from within SPL. Support for the underlying block
659 device (e.g. MMC or USB) must be enabled separately.
662 bool "Support FAT filesystems"
665 Enable support for FAT and VFAT filesystems with SPL. This
666 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
667 filesystem from within SPL. Support for the underlying block
668 device (e.g. MMC or USB) must be enabled separately.
670 config SPL_FS_LOAD_PAYLOAD_NAME
671 string "File to load for U-Boot from the filesystem"
672 depends on SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS || SPL_SEMIHOSTING
673 default "tispl.bin" if SYS_K3_SPL_ATF
674 default "u-boot.itb" if SPL_LOAD_FIT
677 Filename to read to load U-Boot when reading from filesystem.
679 config SPL_FS_LOAD_KERNEL_NAME
680 string "File to load for the OS kernel from the filesystem"
681 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
684 Filename to read to load for the OS kernel when reading from the
687 config SPL_FS_LOAD_ARGS_NAME
688 string "File to load for the OS kernel argument parameters from the filesystem"
689 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
692 Filename to read to load for the OS kernel argument parameters from
696 bool "Support write for FAT filesystems"
698 Enable write support for FAT and VFAT filesystems with SPL.
699 Support for the underlying block device (e.g. MMC or USB) must be
705 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
706 provide software-configurable hardware which is typically used to
707 implement peripherals (such as UARTs, LCD displays, MMC) or
708 accelerate custom processing functions, such as image processing
709 or machine learning. Sometimes it is useful to program the FPGA
710 as early as possible during boot, and this option can enable that
714 bool "Support GPIO in SPL"
716 Enable support for GPIOs (General-purpose Input/Output) in SPL.
717 GPIOs allow U-Boot to read the state of an input line (high or
718 low) and set the state of an output line. This can be used to
719 drive LEDs, control power to various system parts and read user
720 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
721 for example. Enable this option to build the drivers in
722 drivers/gpio as part of an SPL build.
727 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
728 I2C works with a clock and data line which can be driven by a
729 one or more masters or slaves. It is a fairly complex bus but is
730 widely used as it only needs two lines for communication. Speeds of
731 400kbps are typical but up to 3.4Mbps is supported by some
732 hardware. I2C can be useful in SPL to configure power management
733 ICs (PMICs) before raising the CPU clock speed, for example.
734 Enable this option to build the drivers in drivers/i2c as part of
737 config SPL_LIBCOMMON_SUPPORT
738 bool "Support common libraries"
740 Enable support for common U-Boot libraries within SPL. These
741 libraries include common code to deal with U-Boot images,
742 environment and USB, for example. This option is enabled on many
743 boards. Enable this option to build the code in common/ as part of
746 config SPL_LIBDISK_SUPPORT
747 bool "Support disk partitions"
750 Enable support for disk partitions within SPL. 'Disk' is something
751 of a misnomer as it includes non-spinning media such as flash (as
752 used in MMC and USB sticks). Partitions provide a way for a disk
753 to be split up into separate regions, with a partition table placed
754 at the start or end which describes the location and size of each
755 'partition'. These partitions are typically uses as individual block
756 devices, typically with an EXT2 or FAT filesystem in each. This
757 option enables whatever partition support has been enabled in
758 U-Boot to also be used in SPL. It brings in the code in disk/.
760 config SPL_LIBGENERIC_SUPPORT
761 bool "Support generic libraries"
763 Enable support for generic U-Boot libraries within SPL. These
764 libraries include generic code to deal with device tree, hashing,
765 printf(), compression and the like. This option is enabled on many
766 boards. Enable this option to build the code in lib/ as part of an
769 config SPL_DM_MAILBOX
770 bool "Support Mailbox"
773 Enable support for Mailbox within SPL. This enable the inter
774 processor communication protocols tobe used within SPL. Enable
775 this option to build the drivers in drivers/mailbox as part of
779 bool "Support Memory controller drivers"
781 Enable support for Memory Controller drivers within SPL.
782 These devices provide Memory bus interface to various devices like
783 SRAM, Ethernet adapters, FPGAs, etc.
789 Enable support for MMC (Multimedia Card) within SPL. This enables
790 the MMC protocol implementation and allows any enabled drivers to
791 be used within SPL. MMC can be used with or without disk partition
792 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
793 this option to build the drivers in drivers/mmc as part of an SPL
796 config SYS_MMCSD_FS_BOOT
797 bool "MMC FS Boot mode"
799 default y if !ARCH_MVEBU
801 Enable MMC FS Boot mode. Partition is selected by option
802 SYS_MMCSD_FS_BOOT_PARTITION.
804 config SYS_MMCSD_FS_BOOT_PARTITION
805 int "MMC Boot Partition"
806 depends on SYS_MMCSD_FS_BOOT
809 Partition on the MMC to load U-Boot from when the MMC is being
811 Use -1 as a special value to use the first bootable partition.
814 bool "Tiny MMC framework in SPL"
817 Enable MMC framework tinification support. This option is useful if
818 if your SPL is extremely size constrained. Heed the warning, enable
819 this option if and only if you know exactly what you are doing, if
820 you are reading this help text, you most likely have no idea :-)
822 The MMC framework is reduced to bare minimum to be useful. No malloc
823 support is needed for the MMC framework operation with this option
824 enabled. The framework supports exactly one MMC device and exactly
825 one MMC driver. The MMC driver can be adjusted to avoid any malloc
826 operations too, which can remove the need for malloc support in SPL
827 and thus further reduce footprint.
830 bool "MMC/SD/SDIO card support for write operations in SPL"
833 Enable write access to MMC and SD Cards in SPL
836 config SPL_MPC8XXX_INIT_DDR
837 bool "Support MPC8XXX DDR init"
839 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
840 random-access memory) on the MPC8XXX family within SPL. This
841 allows DRAM to be set up before loading U-Boot into that DRAM,
844 config SPL_MTD_SUPPORT
845 bool "Support MTD drivers"
847 Enable support for MTD (Memory Technology Device) within SPL. MTD
848 provides a block interface over raw NAND and can also be used with
849 SPI flash. This allows SPL to load U-Boot from supported MTD
850 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
851 to enable specific MTD drivers.
854 bool "Support new Mentor Graphics USB"
856 Enable support for Mentor Graphics USB in SPL. This is a new
857 driver used by some boards. Enable this option to build
858 the drivers in drivers/usb/musb-new as part of an SPL build. The
859 old drivers are in drivers/usb/musb.
861 config SPL_NAND_SUPPORT
862 bool "Support NAND flash"
864 Enable support for NAND (Negative AND) flash in SPL. NAND flash
865 can be used to allow SPL to load U-Boot from supported devices.
866 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
869 config SPL_NAND_RAW_ONLY
870 bool "Support to boot only raw u-boot.bin images"
871 depends on SPL_NAND_SUPPORT
873 Use this only if you need to save space.
875 config SPL_NAND_DRIVERS
876 bool "Use standard NAND driver"
878 SPL uses normal NAND drivers, not minimal drivers.
881 bool "Include standard ECC in SPL"
883 config SPL_NAND_SOFTECC
884 bool "Use software ECC in SPL"
885 depends on SPL_NAND_ECC
887 config SPL_NAND_SIMPLE
888 bool "Support simple NAND drivers in SPL"
890 Support for NAND boot using simple NAND drivers that
891 expose the cmd_ctrl() interface.
894 depends on SPL_NAND_SUPPORT
895 bool "Use Base NAND Driver"
897 Include nand_base.c in the SPL.
899 config SPL_NAND_IDENT
900 depends on SPL_NAND_BASE
901 bool "Use chip ID to identify NAND flash"
903 SPL uses the chip ID list to identify the NAND flash.
908 Enable support for loading payloads from UBI. See
909 README.ubispl for more info.
911 menu "UBI configuration for SPL"
914 config SPL_UBI_LOAD_BY_VOLNAME
915 bool "Support loading volumes by name"
917 This enables support for loading UBI volumes by name. When this
918 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
919 configure the volume name from which to load U-Boot.
921 config SPL_UBI_MAX_VOL_LEBS
922 int "Maximum number of LEBs per volume"
924 The maximum number of logical eraseblocks which a static volume
925 to load can contain. Used for sizing the scan data structure.
927 config SPL_UBI_MAX_PEB_SIZE
928 int "Maximum PEB size"
930 The maximum physical erase block size.
932 config SPL_UBI_MAX_PEBS
933 int "Maximum number of PEBs"
935 The maximum physical erase block size. If not overridden by
936 board code, this value will be used as the actual number of PEBs.
938 config SPL_UBI_PEB_OFFSET
939 int "Offset to first UBI PEB"
941 The offset in number of PEBs from the start of flash to the first
942 PEB part of the UBI image.
944 config SPL_UBI_VID_OFFSET
945 int "Offset to VID header"
947 config SPL_UBI_LEB_START
948 int "Offset to LEB in PEB"
950 The offset in bytes to the LEB within a PEB.
952 config SPL_UBI_INFO_ADDR
953 hex "Address to place UBI scan info"
955 Address for ubispl to place the scan info. Read README.ubispl to
956 determine the required size
958 config SPL_UBI_VOL_IDS
959 int "Maximum volume id"
961 The maximum volume id which can be loaded. Used for sizing the
964 config SPL_UBI_LOAD_MONITOR_ID
965 int "id of U-Boot volume"
967 The UBI volume id from which to load U-Boot
969 config SPL_UBI_LOAD_MONITOR_VOLNAME
970 string "volume name of U-Boot volume"
971 depends on SPL_UBI_LOAD_BY_VOLNAME
973 The UBI volume name from which to load U-Boot
975 config SPL_UBI_LOAD_KERNEL_ID
976 int "id of kernel volume"
977 depends on SPL_OS_BOOT
979 The UBI volume id from which to load the kernel
981 config SPL_UBI_LOAD_ARGS_ID
982 int "id of kernel args volume"
983 depends on SPL_OS_BOOT
985 The UBI volume id from which to load the device tree
987 config UBI_SPL_SILENCE_MSG
988 bool "silence UBI SPL messages"
990 Disable messages from UBI SPL. This leaves warnings
996 bool "Support SPI DM drivers in SPL"
999 Enable support for SPI DM drivers in SPL.
1001 config SPL_DM_SPI_FLASH
1002 bool "Support SPI DM FLASH drivers in SPL"
1005 Enable support for SPI DM flash drivers in SPL.
1008 bool "Support networking"
1010 Enable support for network devices (such as Ethernet) in SPL.
1011 This permits SPL to load U-Boot over a network link rather than
1012 from an on-board peripheral. Environment support is required since
1013 the network stack uses a number of environment variables. See also
1016 config SPL_NET_VCI_STRING
1017 string "BOOTP Vendor Class Identifier string sent by SPL"
1020 As defined by RFC 2132 the vendor class identifier field can be
1021 sent by the client to identify the vendor type and configuration
1022 of a client. This is often used in practice to allow for the DHCP
1023 server to specify different files to load depending on if the ROM,
1024 SPL or U-Boot itself makes the request
1026 config SPL_NO_CPU_SUPPORT
1028 depends on (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
1030 This is specific to the ARM926EJ-S CPU. It disables the standard
1031 start.S start-up code, presumably so that a replacement can be
1032 used on that CPU. You should not enable it unless you know what
1035 config SPL_NOR_SUPPORT
1036 bool "Support NOR flash"
1038 Enable support for loading U-Boot from memory-mapped NOR (Negative
1039 OR) flash in SPL. NOR flash is slow to write but fast to read, and
1040 a memory-mapped device makes it very easy to access. Loading from
1041 NOR is typically achieved with just a memcpy().
1043 config SPL_XIP_SUPPORT
1046 Enable support for execute in place of U-Boot or kernel image. There
1047 is no need to copy image from flash to ram if flash supports execute
1048 in place. Its very useful in systems having enough flash but not
1049 enough ram to load the image.
1051 config SPL_ONENAND_SUPPORT
1052 bool "Support OneNAND flash"
1054 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
1055 a type of NAND flash and therefore can be used to allow SPL to
1056 load U-Boot from supported devices. This enables the drivers in
1057 drivers/mtd/onenand as part of an SPL build.
1060 bool "Activate Falcon Mode"
1061 depends on !TI_SECURE_DEVICE
1063 Enable booting directly to an OS from SPL.
1064 for more info read doc/README.falcon
1066 config SYS_SPL_ARGS_ADDR
1067 hex "Address in memory to load 'args' file for Falcon Mode to"
1068 depends on SPL_OS_BOOT
1069 default 0x88000000 if ARCH_OMAP2PLUS
1071 Address in memory where the 'args' file, typically a device tree
1072 will be loaded in to memory.
1074 config SYS_NAND_SPL_KERNEL_OFFS
1075 hex "Address in memory to load the OS file for Falcon mode to"
1076 depends on SPL_OS_BOOT && SPL_NAND_SUPPORT
1079 hex "addr, where OS is found"
1080 depends on SPL_OS_BOOT && SPL_NOR_SUPPORT
1082 Specify the address, where the OS image is found, which
1085 config SPL_FALCON_BOOT_MMCSD
1086 bool "Enable Falcon boot from MMC or SD media"
1087 depends on SPL_OS_BOOT && SPL_MMC
1089 Select this if the Falcon mode OS image mode is on MMC or SD media.
1091 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
1092 hex "Falcon mode: Sector to load kernel uImage from MMC"
1093 depends on SPL_FALCON_BOOT_MMCSD
1095 When Falcon mode is used with an MMC or SD media, SPL needs to know
1096 where to look for the kernel uImage. The image is expected to begin
1097 at the raw MMC specified in this config.
1098 Note that the Falcon mode image can also be a FIT, if FIT support is
1101 config SYS_MMCSD_RAW_MODE_ARGS_SECTOR
1102 hex "Falcon mode: Sector to load 'args' from MMC"
1103 depends on SPL_FALCON_BOOT_MMCSD
1105 When Falcon mode is used with an MMC or SD media, SPL needs to know
1106 where to look for the OS 'args', typically a device tree. The
1107 contents are expected to begin at the raw MMC specified in this config.
1108 Note that if using a FIT image, this and the next option can be set to
1111 config SYS_MMCSD_RAW_MODE_ARGS_SECTORS
1112 hex "Falcon mode: Number of sectors to load for 'args' from MMC"
1113 depends on SPL_FALCON_BOOT_MMCSD && SYS_MMCSD_RAW_MODE_ARGS_SECTOR != 0x0
1116 string "SPL payload"
1117 default "tpl/u-boot-with-tpl.bin" if TPL
1118 default "u-boot.bin"
1120 Payload for SPL boot. For backward compatibility, default to
1121 u-boot.bin, i.e. RAW image without any header. In case of
1122 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1126 bool "Support PCI drivers"
1128 Enable support for PCI in SPL. For platforms that need PCI to boot,
1129 or must perform some init using PCI in SPL, this provides the
1130 necessary driver support. This enables the drivers in drivers/pci
1131 as part of an SPL build.
1134 bool "Support PCH drivers"
1136 Enable support for PCH (Platform Controller Hub) devices in SPL.
1137 These are used to set up GPIOs and the SPI peripheral early in
1138 boot. This enables the drivers in drivers/pch as part of an SPL
1141 config SPL_POST_MEM_SUPPORT
1142 bool "Support POST drivers"
1144 Enable support for POST (Power-on Self Test) in SPL. POST is a
1145 procedure that checks that the hardware (CPU or board) appears to
1146 be functionally correctly. It is a sanity check that can be
1147 performed before booting. This enables the drivers in post/drivers
1148 as part of an SPL build.
1151 bool "Support reset drivers"
1154 Enable support for reset control in SPL.
1155 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1156 by using the generic reset API provided by driver model.
1157 This enables the drivers in drivers/reset as part of an SPL build.
1160 bool "Support power drivers"
1162 Enable support for power control in SPL. This includes support
1163 for PMICs (Power-management Integrated Circuits) and some of the
1164 features provided by PMICs. In particular, voltage regulators can
1165 be used to enable/disable power and vary its voltage. That can be
1166 useful in SPL to turn on boot peripherals and adjust CPU voltage
1167 so that the clock speed can be increased. This enables the drivers
1168 in drivers/power, drivers/power/pmic and drivers/power/regulator
1169 as part of an SPL build.
1171 config SPL_POWER_DOMAIN
1172 bool "Support power domain drivers"
1175 Enable support for power domain control in SPL. Many SoCs allow
1176 power to be applied to or removed from portions of the SoC (power
1177 domains). This may be used to save power. This API provides the
1178 means to control such power management hardware. This enables
1179 the drivers in drivers/power/domain as part of a SPL build.
1181 config SPL_RAM_SUPPORT
1182 bool "Support booting from RAM"
1183 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1185 Enable booting of an image in RAM. The image can be preloaded or
1186 it can be loaded by SPL directly into RAM (e.g. using USB).
1188 config SPL_RAM_DEVICE
1189 bool "Support booting from preloaded image in RAM"
1190 depends on SPL_RAM_SUPPORT
1191 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1193 Enable booting of an image already loaded in RAM. The image has to
1194 be already in memory when SPL takes over, e.g. loaded by the boot
1197 config SPL_REMOTEPROC
1198 bool "Support REMOTEPROCS"
1200 Enable support for REMOTEPROCs in SPL. This permits to load
1201 a remote processor firmware in SPL.
1204 bool "Support RTC drivers"
1206 Enable RTC (Real-time Clock) support in SPL. This includes support
1207 for reading and setting the time. Some RTC devices also have some
1208 non-volatile (battery-backed) memory which is accessible if
1209 needed. This enables the drivers in drivers/rtc as part of an SPL
1213 bool "Support loading from SATA"
1215 Enable support for SATA (Serial AT attachment) in SPL. This allows
1216 use of SATA devices such as hard drives and flash drivers for
1217 loading U-Boot. SATA is used in higher-end embedded systems and
1218 can provide higher performance than MMC , at somewhat higher
1219 expense and power consumption. This enables loading from SATA
1220 using a configured device.
1222 config SYS_SATA_FAT_BOOT_PARTITION
1223 int "Partition on the SATA disk to load U-Boot from"
1224 depends on SPL_SATA && SPL_FS_FAT
1227 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1228 bool "SATA raw mode: by sector"
1230 default y if ARCH_MVEBU
1232 Use sector number for specifying U-Boot location on SATA disk in
1235 config SPL_SATA_RAW_U_BOOT_SECTOR
1236 hex "Sector on the SATA disk to load U-Boot from"
1237 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1238 default 0x1 if ARCH_MVEBU
1240 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1241 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1244 bool "NVM Express device support"
1246 select HAVE_BLOCK_DEVICE
1250 This option enables support for NVM Express devices.
1251 It supports basic functions of NVMe (read/write).
1254 bool "NVM Express PCI device support for SPL"
1255 depends on SPL_PCI && SPL_NVME
1257 This option enables support for NVM Express PCI devices.
1258 This allows use of NVMe devices for loading u-boot.
1260 config SPL_NVME_BOOT_DEVICE
1261 hex "NVMe boot device number"
1265 config SYS_NVME_BOOT_PARTITION
1266 hex "NVMe boot partition number"
1271 bool "Support serial"
1275 Enable support for serial in SPL. This allows use of a serial UART
1276 for displaying messages while SPL is running. It also brings in
1277 printf() and panic() functions. This should normally be enabled
1278 unless there are space reasons not to. Even then, consider
1279 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1282 bool "Support SPI drivers"
1284 Enable support for using SPI in SPL. This is used for connecting
1285 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1286 more details on that. The SPI driver provides the transport for
1287 data between the SPI flash and the CPU. This option can be used to
1288 enable SPI drivers that are needed for other purposes also, such
1291 config SPL_SPI_FLASH_SUPPORT
1292 bool "Support SPI flash drivers"
1295 Enable support for using SPI flash in SPL, and loading U-Boot from
1296 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1297 the SPI bus that is used to connect it to a system. It is a simple
1298 but fast bidirectional 4-wire bus (clock, chip select and two data
1299 lines). This enables the drivers in drivers/mtd/spi as part of an
1300 SPL build. This normally requires SPL_SPI.
1302 if SPL_SPI_FLASH_SUPPORT
1304 config SPL_SPI_FLASH_TINY
1305 bool "Enable low footprint SPL SPI Flash support"
1306 depends on !SPI_FLASH_BAR
1307 default y if SPI_FLASH
1309 Enable lightweight SPL SPI Flash support that supports just reading
1310 data/images from flash. No support to write/erase flash. Enable
1311 this if you have SPL size limitations and don't need full
1312 fledged SPI flash support.
1314 config SPL_SPI_FLASH_SFDP_SUPPORT
1315 bool "SFDP table parsing support for SPI NOR flashes"
1316 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1318 Enable support for parsing and auto discovery of parameters for
1319 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1320 tables as per JESD216 standard in SPL.
1322 config SPL_SPI_FLASH_MTD
1323 bool "Support for SPI flash MTD drivers in SPL"
1325 Enable support for SPI flash MTD drivers in SPL.
1328 bool "Support loading from SPI flash"
1330 Enable support for loading next stage, U-Boot or otherwise, from
1331 SPI NOR in U-Boot SPL.
1333 endif # SPL_SPI_FLASH_SUPPORT
1335 config SYS_SPI_U_BOOT_OFFS
1336 hex "address of u-boot payload in SPI flash"
1337 default 0x8000 if ARCH_SUNXI
1339 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1341 Address within SPI-Flash from where the u-boot payload is fetched
1345 bool "Driver support for thermal devices"
1347 Enable support for temperature-sensing devices. Some SoCs have on-chip
1348 temperature sensors to permit warnings, speed throttling or even
1349 automatic power-off when the temperature gets too high or low. Other
1350 devices may be discrete but connected on a suitable bus.
1353 bool "Support watchdog drivers"
1354 imply SPL_WDT if !HW_WATCHDOG
1356 Enable support for watchdog drivers in SPL. A watchdog is
1357 typically a hardware peripheral which can reset the system when it
1358 detects no activity for a while (such as a software crash). This
1359 enables the drivers in drivers/watchdog as part of an SPL build.
1361 config SPL_YMODEM_SUPPORT
1362 bool "Support loading using Ymodem"
1363 depends on SPL_SERIAL
1365 While loading from serial is slow it can be a useful backup when
1366 there is no other option. The Ymodem protocol provides a reliable
1367 means of transmitting U-Boot over a serial line for using in SPL,
1368 with a checksum to ensure correctness.
1371 bool "Support ARM Trusted Firmware"
1373 depends on SPL_LOAD_FIT && !SPL_FIT_IMAGE_TINY
1375 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1376 is loaded by SPL (which is considered as BL2 in ATF terminology).
1377 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1379 config SPL_ATF_LOAD_IMAGE_V2
1380 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1383 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1385 If you want to load a bl31 image from the SPL and need the new
1388 config SPL_ATF_NO_PLATFORM_PARAM
1389 bool "Pass no platform parameter"
1392 While we expect to call a pointer to a valid FDT (or NULL)
1393 as the platform parameter to an ATF, some ATF versions are
1394 not U-Boot aware and have an insufficiently robust parameter
1395 validation to gracefully reject a FDT being passed.
1397 If this option is enabled, the spl_atf os-type handler will
1398 always pass NULL for the platform parameter.
1400 If your ATF is affected, say Y.
1402 config SPL_AM33XX_ENABLE_RTC32K_OSC
1403 bool "Enable the RTC32K OSC on AM33xx based platforms"
1407 Enable access to the AM33xx RTC and select the external 32kHz clock
1410 config SPL_OPTEE_IMAGE
1411 bool "Support OP-TEE Trusted OS image in SPL"
1413 depends on SPL_LOAD_FIT || SPL_LOAD_FIT_FULL
1415 OP-TEE is an open source Trusted OS which is loaded by SPL.
1416 More detail at: https://github.com/OP-TEE/optee_os
1419 bool "Support RISC-V OpenSBI"
1420 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1421 depends on SPL_LOAD_FIT && !SPL_FIT_IMAGE_TINY
1423 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1424 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1425 firmware. It is loaded and started by U-Boot SPL.
1427 More details are available at https://github.com/riscv/opensbi and
1428 https://github.com/riscv/riscv-sbi-doc
1430 config SPL_OPENSBI_LOAD_ADDR
1431 hex "OpenSBI load address"
1432 depends on SPL_OPENSBI
1434 Load address of the OpenSBI binary.
1436 config SPL_OPENSBI_SCRATCH_OPTIONS
1437 hex "Scratch options passed to OpenSBI"
1439 depends on SPL_OPENSBI
1441 This bitmap of options is passed from U-Boot SPL to OpenSBI.
1442 As of OpenSBI 1.3 the following bits are defined:
1443 - SBI_SCRATCH_NO_BOOT_PRINTS = 0x1 (Disable prints during boot)
1444 - SBI_SCRATCH_DEBUG_PRINTS = 0x2 (Enable runtime debug prints)
1447 string "Addtional build targets for 'make'"
1448 default "spl/u-boot-spl.srec" if RCAR_GEN2
1449 default "spl/u-boot-spl.scif" if RCAR_GEN3
1452 On some platforms we need to have 'make' run additional build target
1453 rules. If required on your platform, enter it here, otherwise leave blank.
1456 config SPL_AT91_MCK_BYPASS
1457 bool "Use external clock signal as a source of main clock for AT91 platforms"
1458 depends on ARCH_AT91
1460 Use external 8 to 24 Mhz clock signal as source of main clock instead
1461 of an external crystal oscillator.
1462 This option disables the internal driving on the XOUT pin.
1463 The external source has to provide a stable clock on the XIN pin.
1464 If this option is disabled, the SoC expects a crystal oscillator
1465 that needs driving on both XIN and XOUT lines.
1469 depends on SUPPORT_TPL
1472 If you want to build TPL as well as the normal image and SPL, say Y.
1474 source "common/spl/Kconfig.tpl"
1477 depends on SUPPORT_SPL
1480 If you want to build VPL as well as the normal image, TPL and SPL,
1483 source "common/spl/Kconfig.vpl"