12 config SPL_DFU_NO_RESET
17 depends on SUPPORT_SPL
20 If you want to build SPL as well as the normal image, say Y.
23 bool "Support SPL based upon the common SPL framework"
27 Enable the SPL framework under common/spl/. This framework
28 supports MMC, NAND and YMODEM and other methods loading of U-Boot
29 and the Linux Kernel. If unsure, say Y.
31 config SPL_FRAMEWORK_BOARD_INIT_F
32 bool "Define a generic function board_init_f"
33 depends on SPL_FRAMEWORK
35 Define a generic function board_init_f that:
36 - initialize the spl (spl_early_init)
37 - initialize the serial (preloader_console_init)
38 Unless you want to provide your own board_init_f, you should say Y.
41 hex "Maximum size of SPL image"
43 default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
44 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
47 Specifies the maximum length of the U-Boot SPL image.
48 If this value is zero, it is ignored.
50 config SPL_SIZE_LIMIT_SUBTRACT_GD
51 bool "SPL image size check: provide space for global data"
52 depends on SPL_SIZE_LIMIT > 0
54 If enabled, aligned size of global data is reserved in
55 SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
56 if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
57 pre-reloc global data is put into this SRAM, too.
59 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
60 bool "SPL image size check: provide space for malloc() pool before relocation"
61 depends on SPL_SIZE_LIMIT > 0
63 If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
64 to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
65 describes the size of SRAM available for SPL when pre-reloc malloc
66 pool is put into this SRAM, too.
68 config SPL_SIZE_LIMIT_PROVIDE_STACK
69 hex "SPL image size check: provide stack space before relocation"
70 depends on SPL_SIZE_LIMIT > 0
73 If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
74 an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
75 of SRAM available for SPL when the stack required before reolcation
79 hex "Maximum size of the SPL image, excluding BSS"
80 default 0x30000 if ARCH_MX6 && MX6_OCRAM_256KB
81 default 0x1b000 if AM33XX && !TI_SECURE_DEVICE
82 default 0x10000 if ARCH_MX6 && !MX6_OCRAM_256KB
83 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x10000
84 default 0x7fa0 if SUNXI_SRAM_ADDRESS = 0x20000 && !MACH_SUN50I_H616
85 default 0x7000 if RCAR_GEN3
86 default 0x5fa0 if SUNXI_SRAM_ADDRESS = 0x0
89 Maximum size of the SPL image (text, data, rodata, and linker lists
90 sections), BSS excluded. When defined, the linker checks that the
91 actual size does not exceed it.
94 hex "Offset to which the SPL should be padded before appending the SPL payload"
95 default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
96 default 0x11000 if ARCH_MX7 || (ARCH_MX6 && !MX6_OCRAM_256KB)
97 default 0x10000 if ARCH_KEYSTONE
98 default 0x8000 if ARCH_SUNXI && !MACH_SUN50I_H616
99 default TPL_MAX_SIZE if TPL_MAX_SIZE > SPL_MAX_SIZE
102 Image offset to which the SPL should be padded before appending the
103 SPL payload. By default, this is defined as CONFIG_SPL_MAX_SIZE, or 0 if
104 CONFIG_SPL_MAX_SIZE is undefined. CONFIG_SPL_PAD_TO must be either
105 0, meaning to append the SPL payload without any padding, or >=
108 config SPL_HAS_BSS_LINKER_SECTION
109 depends on SPL_FRAMEWORK
110 bool "Use a specific address for the BSS via the linker script"
111 default y if ARCH_SUNXI || ARCH_MX6 || ARCH_OMAP2PLUS || MIPS || RISCV
113 config SPL_BSS_START_ADDR
114 hex "Link address for the BSS within the SPL binary"
115 depends on SPL_HAS_BSS_LINKER_SECTION
116 default 0x88200000 if (ARCH_MX6 && (MX6SX || MX6SL || MX6UL || MX6ULL)) || ARCH_MX7
117 default 0x18200000 if ARCH_MX6 && !(MX6SX || MX6SL || MX6UL || MX6ULL)
118 default 0x80a00000 if ARCH_OMAP2PLUS
119 default 0x81f80000 if ARCH_SUNXI && MACH_SUNIV
120 default 0x4ff80000 if ARCH_SUNXI && !(MACH_SUN9I || MACH_SUNIV)
121 default 0x2ff80000 if ARCH_SUNXI && MACH_SUN9I
124 prompt "Enforce SPL BSS limit"
125 depends on SPL && !PPC
126 default SPL_BSS_LIMIT
128 In some platforms we only want to enforce a limit on the size of the
129 BSS in memory. On other platforms we need to enforce a limit on the
130 whole of the memory allocation as we're strictly limited to a small
131 typically non-DRAM location. Finally, other platforms do not enforce
132 a memory limit within SPL.
134 config SPL_NO_BSS_LIMIT
135 bool "Do not enforce a build time limit on the size of the BSS"
138 bool "Enforce a limit on the size of the BSS only"
140 config SPL_FOOTPRINT_LIMIT
141 bool "Enforce a limit on the whole of memory allocated to SPL, BSS included"
145 config SPL_BSS_MAX_SIZE
146 hex "Maximum size in memory allocated to the SPL BSS"
147 depends on SPL_BSS_LIMIT
148 default 0x100000 if ARCH_MX6 || RISCV
149 default 0x80000 if ARCH_OMAP2PLUS || ARCH_SUNXI
151 When non-zero, the linker checks that the actual memory used by SPL
152 from __bss_start to __bss_end does not exceed it.
154 config SPL_MAX_FOOTPRINT
155 hex "Maximum size in memory allocated to the SPL, BSS included"
156 depends on SPL_FOOTPRINT_LIMIT
158 When non-zero, the linker checks that the actual memory used by SPL
159 from _start to __bss_end does not exceed it.
161 config SPL_SYS_STACK_F_CHECK_BYTE
165 Constant used to check the stack
167 config SPL_SYS_REPORT_STACK_F_USAGE
168 depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
169 bool "Check and report stack usage in SPL before relocation"
171 If this option is enabled, the initial SPL stack is filled with 0xaa
172 very early, up to the size configured with
173 SPL_SIZE_LIMIT_PROVIDE_STACK.
174 Later when SPL is done using this initial stack and switches to a
175 stack in DRAM, the actually used size of this initial stack is
176 reported by examining the memory and searching for the lowest
177 occurrence of non 0xaa bytes.
178 This default implementation works for stacks growing down only.
180 config SPL_SHOW_ERRORS
181 bool "Show more information when something goes wrong"
183 This enabled more verbose error messages and checking when something
184 goes wrong in SPL. For example, it shows the error code when U-Boot
185 cannot be located. This can help to diagnose the problem and figure
186 out a fix, particularly during development.
188 This adds a small amount to SPL code size, perhaps 100 bytes.
190 config SPL_BINMAN_SYMBOLS
191 bool "Declare binman symbols in SPL"
192 depends on SPL_FRAMEWORK && BINMAN
195 This enables use of symbols in SPL which refer to U-Boot, enabling SPL
196 to obtain the location of U-Boot simply by calling spl_get_image_pos()
197 and spl_get_image_size().
199 For this to work, you must have a U-Boot image in the binman image, so
200 binman can update SPL with the location of it.
202 menu "PowerPC and LayerScape SPL Boot options"
205 bool "Load SPL from NAND flash"
206 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
209 bool "Load SPL from SD Card / eMMC"
210 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
213 bool "Load SPL from SPI flash"
214 depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
217 bool "Create SPL in Freescale PBI format"
218 depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
221 Create boot binary having SPL binary in PBI format concatenated with
224 config SPL_SYS_CCSR_DO_NOT_RELOCATE
225 bool "Ensures that CCSR is not relocated"
228 If this is defined, then CONFIG_SYS_CCSRBAR_PHYS will be forced to a
229 value that ensures that CCSR is not relocated.
231 config TPL_SYS_CCSR_DO_NOT_RELOCATE
233 depends on SPL_SYS_CCSR_DO_NOT_RELOCATE
237 menu "PowerPC SPL / TPL specific options"
238 depends on PPC && (SPL && !SPL_FRAMEWORK)
240 config SPL_INIT_MINIMAL
241 bool "Arch init code will be built for a very small image"
243 config SPL_FLUSH_IMAGE
244 bool "Clean dcache and invalidate icache after loading the image"
246 config SPL_SKIP_RELOCATE
247 bool "Skip relocating SPL"
250 hex "Address to use for global data (gd) in SPL"
251 depends on !SPL_INIT_MINIMAL
253 config SPL_RELOC_TEXT_BASE
254 hex "Address to relocate SPL to"
255 default SPL_TEXT_BASE
257 If unspecified, this is equal to CONFIG_SPL_TEXT_BASE (i.e. no
260 config SPL_RELOC_STACK
261 hex "Address of the start of the stack SPL will use after relocation."
263 If unspecified, this is equal to CONFIG_SYS_SPL_MALLOC_START. Starting
264 address of the malloc pool used in SPL. When this option is set the full
265 malloc is used in SPL and it is set up by spl_init() and before that, the
266 simple malloc() can be used if CONFIG_SYS_MALLOC_F is defined.
268 config SPL_RELOC_MALLOC
269 bool "SPL has malloc pool after relocation"
271 config SPL_RELOC_MALLOC_ADDR
272 hex "Address of malloc pool in SPL"
273 depends on SPL_RELOC_MALLOC
275 config SPL_RELOC_MALLOC_SIZE
276 hex "Size of malloc pool in SPL"
277 depends on SPL_RELOC_MALLOC
280 hex "Address to use for global data (gd) in TPL"
283 config TPL_RELOC_TEXT_BASE
284 hex "Address to relocate TPL to"
286 default TPL_TEXT_BASE
288 If unspecified, this is equal to CONFIG_TPL_TEXT_BASE (i.e. no
291 config TPL_RELOC_STACK
292 hex "Address of the start of the stack TPL will use after relocation."
295 If unspecified, this is equal to CONFIG_SYS_TPL_MALLOC_START. Starting
296 address of the malloc pool used in TPL. When this option is set the full
297 malloc is used in TPL and it is set up by spl_init() and before that, the
298 simple malloc() can be used if CONFIG_SYS_MALLOC_F is defined.
300 config TPL_RELOC_MALLOC
301 bool "TPL has malloc pool after relocation"
304 config TPL_RELOC_MALLOC_ADDR
305 hex "Address of malloc pool in TPL"
306 depends on TPL_RELOC_MALLOC
308 config TPL_RELOC_MALLOC_SIZE
309 hex "Size of malloc pool in TPL"
310 depends on TPL_RELOC_MALLOC
315 bool "Pass hand-off information from SPL to U-Boot proper"
316 depends on SPL && BLOBLIST
318 It is useful to be able to pass information from SPL to U-Boot
319 proper to preserve state that is known in SPL and is needed in U-Boot.
320 Enable this to locate the handoff information in U-Boot proper, early
321 in boot. It is available in gd->handoff. The state state is set up
322 in SPL (or TPL if that is being used).
327 bool "Pass hand-off information from SPL to U-Boot proper"
328 depends on HANDOFF && SPL_BLOBLIST
331 This option enables SPL to write handoff information. This can be
332 used to pass information like the size of SDRAM from SPL to U-Boot
333 proper. Also SPL can receive information from TPL in the same place
337 string "Linker script for the SPL stage"
338 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
340 The SPL stage will usually require a different linker-script
341 (as it runs from a different memory region) than the regular
342 U-Boot stage. Set this to the path of the linker-script to
347 default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
348 default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
349 default 0x20060 if SUN50I_GEN_H6
350 default 0x00060 if ARCH_SUNXI
351 default 0xfffc0000 if ARCH_ZYNQMP
354 The address in memory that SPL will be running from.
356 config SPL_BOARD_INIT
357 bool "Call board-specific initialization in SPL"
359 If this option is enabled, U-Boot will call the function
360 spl_board_init() from board_init_r(). This function should be
361 provided by the board.
363 config VPL_BOARD_INIT
364 bool "Call board-specific initialization in VPL"
366 If this option is enabled, U-Boot will call the function
367 spl_board_init() from board_init_r(). This function should be
368 provided by the board.
370 config SPL_BOOTROM_SUPPORT
371 bool "Support returning to the BOOTROM"
373 Some platforms (e.g. the Rockchip RK3368) provide support in their
374 ROM for loading the next boot-stage after performing basic setup
377 Enable this option, to return to the BOOTROM through the
378 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
379 boot device list, if not implemented for a given board)
381 config SPL_BOOTCOUNT_LIMIT
382 bool "Support bootcount in SPL"
383 depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
385 On some boards, which use 'falcon' mode, it is necessary to check
386 and increment the number of boot attempts. Such boards do not
387 use proper U-Boot for normal boot flow and hence needs those
388 adjustments to be done in the SPL.
390 config SPL_RAW_IMAGE_SUPPORT
391 bool "Support SPL loading and booting of RAW images"
392 default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
394 depends on !TI_SECURE_DEVICE
396 SPL will support loading and booting a RAW image when this option
397 is y. If this is not set, SPL will move on to other available
398 boot media to find a suitable image.
400 config SPL_LEGACY_IMAGE_FORMAT
401 bool "Support SPL loading and booting of Legacy images"
402 default y if !SPL_LOAD_FIT
403 depends on !TI_SECURE_DEVICE
405 SPL will support loading and booting Legacy images when this option
406 is y. If this is not set, SPL will move on to other available
407 boot media to find a suitable image.
409 config SPL_LEGACY_IMAGE_CRC_CHECK
410 bool "Check CRC of Legacy images"
411 depends on SPL_LEGACY_IMAGE_FORMAT
414 Enable this to check the CRC of Legacy images. While this increases
415 reliability, it affects both code size and boot duration.
416 If disabled, Legacy images are booted if the image magic and size
417 are correct, without further integrity checks.
419 config SPL_SYS_MALLOC_SIMPLE
421 prompt "Only use malloc_simple functions in the SPL"
423 Say Y here to only use the *_simple malloc functions from
424 malloc_simple.c, rather then using the versions from dlmalloc.c;
425 this will make the SPL binary smaller at the cost of more heap
426 usage as the *_simple malloc functions do not re-use free-ed mem.
428 config TPL_SYS_MALLOC_SIMPLE
430 prompt "Only use malloc_simple functions in the TPL"
433 Say Y here to only use the *_simple malloc functions from
434 malloc_simple.c, rather then using the versions from dlmalloc.c;
435 this will make the TPL binary smaller at the cost of more heap
436 usage as the *_simple malloc functions do not re-use free-ed mem.
438 config SPL_SHARES_INIT_SP_ADDR
439 bool "SPL and U-Boot use the same initial stack pointer location"
440 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
441 default n if ARCH_SUNXI || ARCH_MX6 || ARCH_MX7
444 In many cases, we can use the same initial stack pointer address for
445 both SPL and U-Boot itself. If you need to specify a different address
446 however, say N here and then set a different value in CONFIG_SPL_STACK.
449 hex "Initial stack pointer location"
450 depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
451 depends on !SPL_SHARES_INIT_SP_ADDR
452 default 0x946bb8 if ARCH_MX7
453 default 0x93ffb8 if ARCH_MX6 && MX6_OCRAM_256KB
454 default 0x91ffb8 if ARCH_MX6 && !MX6_OCRAM_256KB
456 Address of the start of the stack SPL will use before SDRAM is
460 bool "Enable SDRAM location for SPL stack"
462 SPL starts off execution in SRAM and thus typically has only a small
463 stack available. Since SPL sets up DRAM while in its board_init_f()
464 function, it is possible for the stack to move there before
465 board_init_r() is reached. This option enables a special SDRAM
466 location for the SPL stack. U-Boot SPL switches to this after
467 board_init_f() completes, and before board_init_r() starts.
469 config SPL_STACK_R_ADDR
470 depends on SPL_STACK_R
471 hex "SDRAM location for SPL stack"
472 default 0x82000000 if ARCH_OMAP2PLUS
474 Specify the address in SDRAM for the SPL stack. This will be set up
475 before board_init_r() is called.
477 config SPL_STACK_R_MALLOC_SIMPLE_LEN
478 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
479 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
482 Specify the amount of the stack to use as memory pool for
483 malloc_simple after switching the stack to DRAM. This may be set
484 to give board_init_r() a larger heap then the initial heap in
485 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
487 config SPL_SEPARATE_BSS
488 bool "BSS section is in a different memory region from text"
490 Some platforms need a large BSS region in SPL and can provide this
491 because RAM is already set up. In this case BSS can be moved to RAM.
492 This option should then be enabled so that the correct device tree
493 location is used. Normally we put the device tree at the end of BSS
494 but with this option enabled, it goes at _image_binary_end.
496 config SYS_SPL_MALLOC
497 bool "Enable malloc pool in SPL"
498 depends on SPL_FRAMEWORK
500 config HAS_CUSTOM_SPL_MALLOC_START
501 bool "For the SPL malloc pool, define a custom starting address"
502 depends on SYS_SPL_MALLOC
504 config CUSTOM_SYS_SPL_MALLOC_ADDR
505 hex "SPL malloc addr"
506 depends on HAS_CUSTOM_SPL_MALLOC_START
508 config SYS_SPL_MALLOC_SIZE
509 hex "Size of the SPL malloc pool"
510 depends on SYS_SPL_MALLOC
515 depends on SPL_OF_PLATDATA
516 # Bind cannot be supported because the udevice structs are in read-only
517 # memory so we cannot update the linked lists.
518 select SPL_OF_PLATDATA_NO_BIND
519 select SPL_OF_PLATDATA_RT
521 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
522 section of memory. This means that of-platdata must make a copy (in
523 writeable memory) of anything it wants to modify, such as
526 config TPL_SEPARATE_BSS
527 bool "BSS section is in a different memory region from text"
528 default y if SPL_SEPARATE_BSS
530 Some platforms need a large BSS region in TPL and can provide this
531 because RAM is already set up. In this case BSS can be moved to RAM.
532 This option should then be enabled so that the correct device tree
533 location is used. Normally we put the device tree at the end of BSS
534 but with this option enabled, it goes at _image_binary_end.
536 config SPL_BANNER_PRINT
537 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
540 If this option is enabled, SPL will print the banner with version
541 info. Disabling this option could be useful to reduce SPL boot time
542 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
544 config TPL_BANNER_PRINT
545 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
549 If this option is enabled, TPL will print the banner with version
550 info. Disabling this option could be useful to reduce TPL boot time
551 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
554 depends on ARM && !ARM64
555 bool "Allows initializing BSS early before entering board_init_f"
557 On some platform we have sufficient memory available early on to
558 allow setting up and using a basic BSS prior to entering
559 board_init_f. Activating this option will also de-activate the
560 clearing of BSS during the SPL relocation process, thus allowing
561 to carry state from board_init_f to board_init_r by way of BSS.
563 config SPL_DISPLAY_PRINT
564 bool "Display a board-specific message in SPL"
566 If this option is enabled, U-Boot will call the function
567 spl_display_print() immediately after displaying the SPL console
568 banner ("U-Boot SPL ..."). This function should be provided by
571 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
572 bool "MMC raw mode: by sector"
573 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
574 ARCH_MX6 || ARCH_MX7 || \
575 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
576 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
577 OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
578 TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
580 Use sector number for specifying U-Boot location on MMC/SD in
583 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
584 hex "Address on the MMC to load U-Boot from"
585 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
586 default 0x40 if ARCH_SUNXI
587 default 0x75 if ARCH_DAVINCI
588 default 0x8a if ARCH_MX6 || ARCH_MX7
589 default 0x100 if ARCH_UNIPHIER
590 default 0x0 if ARCH_MVEBU
591 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
592 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
593 OMAP54XX || AM33XX || AM43XX || ARCH_K3
594 default 0x4000 if ARCH_ROCKCHIP
595 default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
597 Address on the MMC to load U-Boot from, when the MMC is being used
598 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
600 config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
601 hex "U-Boot main hardware partition image offset"
602 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
603 default 0x10 if ARCH_SUNXI
606 On some platforms SPL location depends on hardware partition. The ROM
607 code skips the MBR sector when loading SPL from main hardware data
608 partition. This adds offset to the main U-Boot image. Set this symbol
609 to the number of skipped sectors.
611 If unsure, leave the default.
613 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
614 bool "MMC Raw mode: by partition"
616 Use a partition for loading U-Boot when using MMC/SD in raw mode.
618 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
619 hex "Partition to use to load U-Boot from"
620 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
623 Partition on the MMC to load U-Boot from when the MMC is being
626 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
627 bool "MMC raw mode: by partition type"
628 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
630 Use partition type for specifying U-Boot partition on MMC/SD in
631 raw mode. U-Boot will be loaded from the first partition of this
634 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
635 hex "Partition Type on the MMC to load U-Boot from"
636 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
638 Partition Type on the MMC to load U-Boot from, when the MMC is being
641 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
642 bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
643 depends on SUPPORT_EMMC_BOOT
645 eMMC boot partition is normally configured by the bits of the EXT_CSD
646 register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
647 cases it might be required in SPL to load the image from different
648 partition than the partition selected by EXT_CSC_PART_CONFIG register.
649 Enable this option if you intend to use an eMMC boot partition other
650 then selected via EXT_CSC_PART_CONFIG register and specify the custom
651 partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
654 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
655 int "Number of the eMMC boot partition to use"
656 depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
659 eMMC boot partition number to use when the eMMC in raw mode and
660 the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
661 by user defined partition number.
665 default y if SPL_LEGACY_IMAGE_FORMAT || SPL_EFI_PARTITION
666 default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
668 Enable this to support CRC32 in uImages or FIT images within SPL.
669 This is a 32-bit checksum value that can be used to verify images.
670 For FIT images, this is the least secure type of checksum, suitable
671 for detected accidental image corruption. For secure applications you
672 should consider SHA1 or SHA256.
678 Enable this to support MD5 in FIT images within SPL. An MD5
679 checksum is a 128-bit hash value used to check that the image
680 contents have not been corrupted. Note that MD5 is not considered
681 secure as it is possible (with a brute-force attack) to adjust the
682 image while still retaining the same MD5 hash value. For secure
683 applications where images may be changed maliciously, you should
684 consider SHA256 or SHA384.
686 config SPL_FIT_IMAGE_TINY
687 bool "Remove functionality from SPL FIT loading to reduce size"
689 default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
690 default y if ARCH_IMX8M
692 Enable this to reduce the size of the FIT image loading code
693 in SPL, if space for the SPL binary is very tight.
695 This skips the recording of each loaded payload
696 (i.e. loadable) into the FDT (modifying the loaded FDT to
697 ensure this information is available to the next image
701 bool "Support CACHE drivers"
703 Enable CACHE drivers in SPL. These drivers can keep data so that
704 future requests for that data can be served faster. Enable this option
705 to build the drivers in drivers/cache as part of an SPL build.
708 bool "Support CPU drivers"
710 Enable this to support CPU drivers in SPL. These drivers can set
711 up CPUs and provide information about them such as the model and
712 name. This can be useful in SPL since setting up the CPUs earlier
713 may improve boot performance. Enable this option to build the
714 drivers in drivers/cpu as part of an SPL build.
717 bool "Support crypto drivers"
719 Enable crypto drivers in SPL. These drivers can be used to
720 accelerate secure boot processing in secure applications. Enable
721 this option to build the drivers in drivers/crypto as part of an
725 bool "Support DMA drivers"
727 Enable DMA (direct-memory-access) drivers in SPL. These drivers
728 can be used to handle memory-to-peripheral data transfer without
729 the CPU moving the data. Enable this option to build the drivers
730 in drivers/dma as part of an SPL build.
732 config SPL_DRIVERS_MISC
733 bool "Support misc drivers"
735 Enable miscellaneous drivers in SPL. These drivers perform various
736 tasks that don't fall nicely into other categories, Enable this
737 option to build the drivers in drivers/misc as part of an SPL
738 build, for those that support building in SPL (not all drivers do).
740 config SPL_ENV_SUPPORT
741 bool "Support an environment"
743 Enable environment support in SPL. The U-Boot environment provides
744 a number of settings (essentially name/value pairs) which can
745 control many aspects of U-Boot's operation. Normally this is not
746 needed in SPL as it has a much simpler task with less
747 configuration. But some boards use this to support 'Falcon' boot
748 on EXT2 and FAT, where SPL boots directly into Linux without
749 starting U-Boot first. Enabling this option will make env_get()
750 and env_set() available in SPL.
753 bool "Support save environment"
754 depends on SPL_ENV_SUPPORT
755 select SPL_MMC_WRITE if ENV_IS_IN_MMC
757 Enable save environment support in SPL after setenv. By default
758 the saveenv option is not provided in SPL, but some boards need
759 this support in 'Falcon' boot, where SPL need to boot from
760 different images based on environment variable set by OS. For
761 example OS may set "reboot_image" environment variable to
762 "recovery" inorder to boot recovery image by SPL. The SPL read
763 "reboot_image" and act accordingly and change the reboot_image
764 to default mode using setenv and save the environment.
767 bool "Support Ethernet"
768 depends on SPL_ENV_SUPPORT
771 Enable access to the network subsystem and associated Ethernet
772 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
773 link rather than from an on-board peripheral. Environment support
774 is required since the network stack uses a number of environment
775 variables. See also SPL_NET.
778 bool "Support EXT filesystems"
780 Enable support for EXT2/3/4 filesystems with SPL. This permits
781 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
782 filesystem from within SPL. Support for the underlying block
783 device (e.g. MMC or USB) must be enabled separately.
785 config SPL_FS_SQUASHFS
786 bool "Support SquashFS filesystems"
789 Enable support for SquashFS filesystems with SPL. This permits
790 U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
791 filesystem from within SPL. Support for the underlying block
792 device (e.g. MMC or USB) must be enabled separately.
795 bool "Support FAT filesystems"
798 Enable support for FAT and VFAT filesystems with SPL. This
799 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
800 filesystem from within SPL. Support for the underlying block
801 device (e.g. MMC or USB) must be enabled separately.
803 config SPL_FS_LOAD_PAYLOAD_NAME
804 string "File to load for U-Boot from the filesystem"
805 depends on SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS
806 default "tispl.bin" if SYS_K3_SPL_ATF
807 default "u-boot.itb" if SPL_LOAD_FIT
810 Filename to read to load U-Boot when reading from filesystem.
812 config SPL_FS_LOAD_KERNEL_NAME
813 string "File to load for the OS kernel from the filesystem"
814 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
817 Filename to read to load for the OS kernel when reading from the
820 config SPL_FS_LOAD_ARGS_NAME
821 string "File to load for the OS kernel argument parameters from the filesystem"
822 depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
825 Filename to read to load for the OS kernel argument parameters from
829 bool "Support write for FAT filesystems"
831 Enable write support for FAT and VFAT filesystems with SPL.
832 Support for the underlying block device (e.g. MMC or USB) must be
838 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
839 provide software-configurable hardware which is typically used to
840 implement peripherals (such as UARTs, LCD displays, MMC) or
841 accelerate custom processing functions, such as image processing
842 or machine learning. Sometimes it is useful to program the FPGA
843 as early as possible during boot, and this option can enable that
847 bool "Support GPIO in SPL"
849 Enable support for GPIOs (General-purpose Input/Output) in SPL.
850 GPIOs allow U-Boot to read the state of an input line (high or
851 low) and set the state of an output line. This can be used to
852 drive LEDs, control power to various system parts and read user
853 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
854 for example. Enable this option to build the drivers in
855 drivers/gpio as part of an SPL build.
860 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
861 I2C works with a clock and data line which can be driven by a
862 one or more masters or slaves. It is a fairly complex bus but is
863 widely used as it only needs two lines for communication. Speeds of
864 400kbps are typical but up to 3.4Mbps is supported by some
865 hardware. I2C can be useful in SPL to configure power management
866 ICs (PMICs) before raising the CPU clock speed, for example.
867 Enable this option to build the drivers in drivers/i2c as part of
870 config SPL_LIBCOMMON_SUPPORT
871 bool "Support common libraries"
873 Enable support for common U-Boot libraries within SPL. These
874 libraries include common code to deal with U-Boot images,
875 environment and USB, for example. This option is enabled on many
876 boards. Enable this option to build the code in common/ as part of
879 config SPL_LIBDISK_SUPPORT
880 bool "Support disk partitions"
883 Enable support for disk partitions within SPL. 'Disk' is something
884 of a misnomer as it includes non-spinning media such as flash (as
885 used in MMC and USB sticks). Partitions provide a way for a disk
886 to be split up into separate regions, with a partition table placed
887 at the start or end which describes the location and size of each
888 'partition'. These partitions are typically uses as individual block
889 devices, typically with an EXT2 or FAT filesystem in each. This
890 option enables whatever partition support has been enabled in
891 U-Boot to also be used in SPL. It brings in the code in disk/.
893 config SPL_LIBGENERIC_SUPPORT
894 bool "Support generic libraries"
896 Enable support for generic U-Boot libraries within SPL. These
897 libraries include generic code to deal with device tree, hashing,
898 printf(), compression and the like. This option is enabled on many
899 boards. Enable this option to build the code in lib/ as part of an
902 config SPL_DM_MAILBOX
903 bool "Support Mailbox"
905 Enable support for Mailbox within SPL. This enable the inter
906 processor communication protocols tobe used within SPL. Enable
907 this option to build the drivers in drivers/mailbox as part of
913 select HAVE_BLOCK_DEVICE
915 Enable support for MMC (Multimedia Card) within SPL. This enables
916 the MMC protocol implementation and allows any enabled drivers to
917 be used within SPL. MMC can be used with or without disk partition
918 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
919 this option to build the drivers in drivers/mmc as part of an SPL
922 config SYS_MMCSD_FS_BOOT_PARTITION
923 int "MMC Boot Partition"
926 Partition on the MMC to load U-Boot from when the MMC is being
928 Use -1 as a special value to use the first bootable partition.
931 bool "Tiny MMC framework in SPL"
934 Enable MMC framework tinification support. This option is useful if
935 if your SPL is extremely size constrained. Heed the warning, enable
936 this option if and only if you know exactly what you are doing, if
937 you are reading this help text, you most likely have no idea :-)
939 The MMC framework is reduced to bare minimum to be useful. No malloc
940 support is needed for the MMC framework operation with this option
941 enabled. The framework supports exactly one MMC device and exactly
942 one MMC driver. The MMC driver can be adjusted to avoid any malloc
943 operations too, which can remove the need for malloc support in SPL
944 and thus further reduce footprint.
947 bool "MMC/SD/SDIO card support for write operations in SPL"
950 Enable write access to MMC and SD Cards in SPL
953 config SPL_MPC8XXX_INIT_DDR
954 bool "Support MPC8XXX DDR init"
956 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
957 random-access memory) on the MPC8XXX family within SPL. This
958 allows DRAM to be set up before loading U-Boot into that DRAM,
961 config SPL_MTD_SUPPORT
962 bool "Support MTD drivers"
964 Enable support for MTD (Memory Technology Device) within SPL. MTD
965 provides a block interface over raw NAND and can also be used with
966 SPI flash. This allows SPL to load U-Boot from supported MTD
967 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
968 to enable specific MTD drivers.
971 bool "Support new Mentor Graphics USB"
973 Enable support for Mentor Graphics USB in SPL. This is a new
974 driver used by some boards. Enable this option to build
975 the drivers in drivers/usb/musb-new as part of an SPL build. The
976 old drivers are in drivers/usb/musb.
978 config SPL_NAND_SUPPORT
979 bool "Support NAND flash"
981 Enable support for NAND (Negative AND) flash in SPL. NAND flash
982 can be used to allow SPL to load U-Boot from supported devices.
983 This enables the drivers in drivers/mtd/nand/raw as part of an SPL
986 config SPL_NAND_RAW_ONLY
987 bool "Support to boot only raw u-boot.bin images"
988 depends on SPL_NAND_SUPPORT
990 Use this only if you need to save space.
992 config SPL_NAND_DRIVERS
993 bool "Use standard NAND driver"
995 SPL uses normal NAND drivers, not minimal drivers.
998 bool "Include standard ECC in SPL"
1000 config SPL_NAND_SOFTECC
1001 bool "Use software ECC in SPL"
1002 depends on SPL_NAND_ECC
1004 config SPL_NAND_SIMPLE
1005 bool "Support simple NAND drivers in SPL"
1007 Support for NAND boot using simple NAND drivers that
1008 expose the cmd_ctrl() interface.
1010 config SPL_NAND_BASE
1011 depends on SPL_NAND_DRIVERS
1012 bool "Use Base NAND Driver"
1014 Include nand_base.c in the SPL.
1016 config SPL_NAND_IDENT
1017 depends on SPL_NAND_BASE
1018 bool "Use chip ID to identify NAND flash"
1020 SPL uses the chip ID list to identify the NAND flash.
1025 Enable support for loading payloads from UBI. See
1026 README.ubispl for more info.
1030 bool "Support SPI DM drivers in SPL"
1032 Enable support for SPI DM drivers in SPL.
1034 config SPL_DM_SPI_FLASH
1035 bool "Support SPI DM FLASH drivers in SPL"
1037 Enable support for SPI DM flash drivers in SPL.
1041 config SPL_UBI_LOAD_BY_VOLNAME
1042 bool "Support loading volumes by name"
1044 This enables support for loading UBI volumes by name. When this
1045 is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
1046 configure the volume name from which to load U-Boot.
1048 config SPL_UBI_MAX_VOL_LEBS
1049 int "Maximum number of LEBs per volume"
1052 The maximum number of logical eraseblocks which a static volume
1053 to load can contain. Used for sizing the scan data structure.
1055 config SPL_UBI_MAX_PEB_SIZE
1056 int "Maximum PEB size"
1059 The maximum physical erase block size.
1061 config SPL_UBI_MAX_PEBS
1062 int "Maximum number of PEBs"
1065 The maximum physical erase block size. If not overridden by
1066 board code, this value will be used as the actual number of PEBs.
1068 config SPL_UBI_PEB_OFFSET
1069 int "Offset to first UBI PEB"
1072 The offset in number of PEBs from the start of flash to the first
1073 PEB part of the UBI image.
1075 config SPL_UBI_VID_OFFSET
1076 int "Offset to VID header"
1079 config SPL_UBI_LEB_START
1080 int "Offset to LEB in PEB"
1083 The offset in bytes to the LEB within a PEB.
1085 config SPL_UBI_INFO_ADDR
1086 hex "Address to place UBI scan info"
1089 Address for ubispl to place the scan info. Read README.ubispl to
1090 determine the required size
1092 config SPL_UBI_VOL_IDS
1093 int "Maximum volume id"
1096 The maximum volume id which can be loaded. Used for sizing the
1097 scan data structure.
1099 config SPL_UBI_LOAD_MONITOR_ID
1100 int "id of U-Boot volume"
1103 The UBI volume id from which to load U-Boot
1105 config SPL_UBI_LOAD_MONITOR_VOLNAME
1106 string "volume name of U-Boot volume"
1107 depends on SPL_UBI_LOAD_BY_VOLNAME
1109 The UBI volume name from which to load U-Boot
1111 config SPL_UBI_LOAD_KERNEL_ID
1112 int "id of kernel volume"
1113 depends on SPL_OS_BOOT && SPL_UBI
1115 The UBI volume id from which to load the kernel
1117 config SPL_UBI_LOAD_ARGS_ID
1118 int "id of kernel args volume"
1119 depends on SPL_OS_BOOT && SPL_UBI
1121 The UBI volume id from which to load the device tree
1123 config UBI_SPL_SILENCE_MSG
1124 bool "silence UBI SPL messages"
1126 Disable messages from UBI SPL. This leaves warnings
1132 bool "Support networking"
1134 Enable support for network devices (such as Ethernet) in SPL.
1135 This permits SPL to load U-Boot over a network link rather than
1136 from an on-board peripheral. Environment support is required since
1137 the network stack uses a number of environment variables. See also
1141 config SPL_NET_VCI_STRING
1142 string "BOOTP Vendor Class Identifier string sent by SPL"
1144 As defined by RFC 2132 the vendor class identifier field can be
1145 sent by the client to identify the vendor type and configuration
1146 of a client. This is often used in practice to allow for the DHCP
1147 server to specify different files to load depending on if the ROM,
1148 SPL or U-Boot itself makes the request
1151 config SPL_NO_CPU_SUPPORT
1152 bool "Drop CPU code in SPL"
1154 This is specific to the ARM926EJ-S CPU. It disables the standard
1155 start.S start-up code, presumably so that a replacement can be
1156 used on that CPU. You should not enable it unless you know what
1159 config SPL_NOR_SUPPORT
1160 bool "Support NOR flash"
1162 Enable support for loading U-Boot from memory-mapped NOR (Negative
1163 OR) flash in SPL. NOR flash is slow to write but fast to read, and
1164 a memory-mapped device makes it very easy to access. Loading from
1165 NOR is typically achieved with just a memcpy().
1167 config SPL_XIP_SUPPORT
1171 Enable support for execute in place of U-Boot or kernel image. There
1172 is no need to copy image from flash to ram if flash supports execute
1173 in place. Its very useful in systems having enough flash but not
1174 enough ram to load the image.
1176 config SPL_ONENAND_SUPPORT
1177 bool "Support OneNAND flash"
1179 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
1180 a type of NAND flash and therefore can be used to allow SPL to
1181 load U-Boot from supported devices. This enables the drivers in
1182 drivers/mtd/onenand as part of an SPL build.
1185 bool "Activate Falcon Mode"
1186 depends on !TI_SECURE_DEVICE
1188 Enable booting directly to an OS from SPL.
1189 for more info read doc/README.falcon
1193 hex "addr, where OS is found"
1194 depends on SPL_NOR_SUPPORT
1196 Specify the address, where the OS image is found, which
1201 config SPL_FALCON_BOOT_MMCSD
1202 bool "Enable Falcon boot from MMC or SD media"
1203 depends on SPL_OS_BOOT && SPL_MMC
1205 Select this if the Falcon mode OS image mode is on MMC or SD media.
1207 config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
1208 hex "Falcon mode: Sector to load kernel uImage from MMC"
1209 depends on SPL_FALCON_BOOT_MMCSD
1211 When Falcon mode is used with an MMC or SD media, SPL needs to know
1212 where to look for the kernel uImage. The image is expected to begin
1213 at the raw MMC specified in this config.
1214 Note that the Falcon mode image can also be a FIT, if FIT support is
1218 string "SPL payload"
1219 default "tpl/u-boot-with-tpl.bin" if TPL
1220 default "u-boot.bin"
1222 Payload for SPL boot. For backward compatibility, default to
1223 u-boot.bin, i.e. RAW image without any header. In case of
1224 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
1228 bool "Support PCI drivers"
1230 Enable support for PCI in SPL. For platforms that need PCI to boot,
1231 or must perform some init using PCI in SPL, this provides the
1232 necessary driver support. This enables the drivers in drivers/pci
1233 as part of an SPL build.
1236 bool "Support PCH drivers"
1238 Enable support for PCH (Platform Controller Hub) devices in SPL.
1239 These are used to set up GPIOs and the SPI peripheral early in
1240 boot. This enables the drivers in drivers/pch as part of an SPL
1243 config SPL_POST_MEM_SUPPORT
1244 bool "Support POST drivers"
1246 Enable support for POST (Power-on Self Test) in SPL. POST is a
1247 procedure that checks that the hardware (CPU or board) appears to
1248 be functionally correctly. It is a sanity check that can be
1249 performed before booting. This enables the drivers in post/drivers
1250 as part of an SPL build.
1253 bool "Support reset drivers"
1256 Enable support for reset control in SPL.
1257 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
1258 by using the generic reset API provided by driver model.
1259 This enables the drivers in drivers/reset as part of an SPL build.
1262 bool "Support power drivers"
1264 Enable support for power control in SPL. This includes support
1265 for PMICs (Power-management Integrated Circuits) and some of the
1266 features provided by PMICs. In particular, voltage regulators can
1267 be used to enable/disable power and vary its voltage. That can be
1268 useful in SPL to turn on boot peripherals and adjust CPU voltage
1269 so that the clock speed can be increased. This enables the drivers
1270 in drivers/power, drivers/power/pmic and drivers/power/regulator
1271 as part of an SPL build.
1273 config SPL_POWER_DOMAIN
1274 bool "Support power domain drivers"
1277 Enable support for power domain control in SPL. Many SoCs allow
1278 power to be applied to or removed from portions of the SoC (power
1279 domains). This may be used to save power. This API provides the
1280 means to control such power management hardware. This enables
1281 the drivers in drivers/power/domain as part of a SPL build.
1283 config SPL_RAM_SUPPORT
1284 bool "Support booting from RAM"
1285 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1287 Enable booting of an image in RAM. The image can be preloaded or
1288 it can be loaded by SPL directly into RAM (e.g. using USB).
1290 config SPL_RAM_DEVICE
1291 bool "Support booting from preloaded image in RAM"
1292 depends on SPL_RAM_SUPPORT
1293 default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
1295 Enable booting of an image already loaded in RAM. The image has to
1296 be already in memory when SPL takes over, e.g. loaded by the boot
1299 config SPL_REMOTEPROC
1300 bool "Support REMOTEPROCS"
1302 Enable support for REMOTEPROCs in SPL. This permits to load
1303 a remote processor firmware in SPL.
1306 bool "Support RTC drivers"
1308 Enable RTC (Real-time Clock) support in SPL. This includes support
1309 for reading and setting the time. Some RTC devices also have some
1310 non-volatile (battery-backed) memory which is accessible if
1311 needed. This enables the drivers in drivers/rtc as part of an SPL
1315 bool "Support loading from SATA"
1317 Enable support for SATA (Serial AT attachment) in SPL. This allows
1318 use of SATA devices such as hard drives and flash drivers for
1319 loading U-Boot. SATA is used in higher-end embedded systems and
1320 can provide higher performance than MMC , at somewhat higher
1321 expense and power consumption. This enables loading from SATA
1322 using a configured device.
1324 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
1325 bool "SATA raw mode: by sector"
1327 default y if ARCH_MVEBU
1329 Use sector number for specifying U-Boot location on SATA disk in
1332 config SPL_SATA_RAW_U_BOOT_SECTOR
1333 hex "Sector on the SATA disk to load U-Boot from"
1334 depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1335 default 0x1 if ARCH_MVEBU
1337 Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1338 used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1341 bool "Support serial"
1345 Enable support for serial in SPL. This allows use of a serial UART
1346 for displaying messages while SPL is running. It also brings in
1347 printf() and panic() functions. This should normally be enabled
1348 unless there are space reasons not to. Even then, consider
1349 enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1352 bool "Support SPI drivers"
1354 Enable support for using SPI in SPL. This is used for connecting
1355 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1356 more details on that. The SPI driver provides the transport for
1357 data between the SPI flash and the CPU. This option can be used to
1358 enable SPI drivers that are needed for other purposes also, such
1361 config SPL_SPI_FLASH_SUPPORT
1362 bool "Support SPI flash drivers"
1365 Enable support for using SPI flash in SPL, and loading U-Boot from
1366 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1367 the SPI bus that is used to connect it to a system. It is a simple
1368 but fast bidirectional 4-wire bus (clock, chip select and two data
1369 lines). This enables the drivers in drivers/mtd/spi as part of an
1370 SPL build. This normally requires SPL_SPI.
1372 if SPL_SPI_FLASH_SUPPORT
1374 config SPL_SPI_FLASH_TINY
1375 bool "Enable low footprint SPL SPI Flash support"
1376 depends on !SPI_FLASH_BAR
1377 default y if SPI_FLASH
1379 Enable lightweight SPL SPI Flash support that supports just reading
1380 data/images from flash. No support to write/erase flash. Enable
1381 this if you have SPL size limitations and don't need full
1382 fledged SPI flash support.
1384 config SPL_SPI_FLASH_SFDP_SUPPORT
1385 bool "SFDP table parsing support for SPI NOR flashes"
1386 depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1388 Enable support for parsing and auto discovery of parameters for
1389 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1390 tables as per JESD216 standard in SPL.
1392 config SPL_SPI_FLASH_MTD
1393 bool "Support for SPI flash MTD drivers in SPL"
1395 Enable support for SPI flash MTD drivers in SPL.
1398 bool "Support loading from SPI flash"
1400 Enable support for loading next stage, U-Boot or otherwise, from
1401 SPI NOR in U-Boot SPL.
1403 endif # SPL_SPI_FLASH_SUPPORT
1405 config SYS_SPI_U_BOOT_OFFS
1406 hex "address of u-boot payload in SPI flash"
1407 default 0x8000 if ARCH_SUNXI
1409 depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1411 Address within SPI-Flash from where the u-boot payload is fetched
1415 bool "Driver support for thermal devices"
1417 Enable support for temperature-sensing devices. Some SoCs have on-chip
1418 temperature sensors to permit warnings, speed throttling or even
1419 automatic power-off when the temperature gets too high or low. Other
1420 devices may be discrete but connected on a suitable bus.
1423 bool "Support USB host drivers"
1424 select HAVE_BLOCK_DEVICE
1426 Enable access to USB (Universal Serial Bus) host devices so that
1427 SPL can load U-Boot from a connected USB peripheral, such as a USB
1428 flash stick. While USB takes a little longer to start up than most
1429 buses, it is very flexible since many different types of storage
1430 device can be attached. This option enables the drivers in
1431 drivers/usb/host as part of an SPL build.
1433 config SPL_USB_STORAGE
1434 bool "Support loading from USB"
1435 depends on SPL_USB_HOST && !(BLK && !DM_USB)
1437 Enable support for USB devices in SPL. This allows use of USB
1438 devices such as hard drives and flash drivers for loading U-Boot.
1439 The actual drivers are enabled separately using the normal U-Boot
1440 config options. This enables loading from USB using a configured
1443 config SPL_USB_GADGET
1444 bool "Suppport USB Gadget drivers"
1446 Enable USB Gadget API which allows to enable USB device functions
1451 config SPL_USB_ETHER
1452 bool "Support USB Ethernet drivers"
1455 Enable access to the USB network subsystem and associated
1456 drivers in SPL. This permits SPL to load U-Boot over a
1457 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1458 than from an onboard peripheral. Environment support is required
1459 since the network stack uses a number of environment variables.
1460 See also SPL_NET and SPL_ETH.
1463 bool "Support DFU (Device Firmware Upgrade)"
1465 select SPL_DFU_NO_RESET
1466 depends on SPL_RAM_SUPPORT
1468 This feature enables the DFU (Device Firmware Upgrade) in SPL with
1469 RAM memory device support. The ROM code will load and execute
1470 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1471 selected device partition from host-pc using dfu-utils.
1472 This feature is useful to flash the binaries to factory or bare-metal
1473 boards using USB interface.
1476 bool "DFU device selection"
1481 depends on SPL_DFU && SPL_RAM_SUPPORT
1483 select RAM/DDR memory device for loading binary images
1484 (u-boot/kernel) to the selected device partition using
1485 DFU and execute the u-boot/kernel from RAM.
1489 config SPL_USB_SDP_SUPPORT
1490 bool "Support SDP (Serial Download Protocol)"
1491 depends on SPL_SERIAL
1493 Enable Serial Download Protocol (SDP) device support in SPL. This
1494 allows to download images into memory and execute (jump to) them
1495 using the same protocol as implemented by the i.MX family's boot ROM.
1497 config SPL_SDP_USB_DEV
1498 int "SDP USB controller index"
1500 depends on SPL_USB_SDP_SUPPORT
1502 Some boards have USB controller other than 0. Define this option
1503 so it can be used in compiled environment.
1507 bool "Support watchdog drivers"
1508 imply SPL_WDT if !HW_WATCHDOG
1510 Enable support for watchdog drivers in SPL. A watchdog is
1511 typically a hardware peripheral which can reset the system when it
1512 detects no activity for a while (such as a software crash). This
1513 enables the drivers in drivers/watchdog as part of an SPL build.
1515 config SPL_YMODEM_SUPPORT
1516 bool "Support loading using Ymodem"
1517 depends on SPL_SERIAL
1519 While loading from serial is slow it can be a useful backup when
1520 there is no other option. The Ymodem protocol provides a reliable
1521 means of transmitting U-Boot over a serial line for using in SPL,
1522 with a checksum to ensure correctness.
1525 bool "Support ARM Trusted Firmware"
1526 depends on ARM64 && SPL_FIT
1528 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1529 is loaded by SPL (which is considered as BL2 in ATF terminology).
1530 More detail at: https://github.com/ARM-software/arm-trusted-firmware
1532 config SPL_ATF_LOAD_IMAGE_V2
1533 bool "Use the new LOAD_IMAGE_V2 parameter passing"
1536 Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
1538 If you want to load a bl31 image from the SPL and need the new
1541 config SPL_ATF_NO_PLATFORM_PARAM
1542 bool "Pass no platform parameter"
1545 While we expect to call a pointer to a valid FDT (or NULL)
1546 as the platform parameter to an ATF, some ATF versions are
1547 not U-Boot aware and have an insufficiently robust parameter
1548 validation to gracefully reject a FDT being passed.
1550 If this option is enabled, the spl_atf os-type handler will
1551 always pass NULL for the platform parameter.
1553 If your ATF is affected, say Y.
1555 config SPL_AM33XX_ENABLE_RTC32K_OSC
1556 bool "Enable the RTC32K OSC on AM33xx based platforms"
1559 Enable access to the AM33xx RTC and select the external 32kHz clock
1562 config SPL_OPTEE_IMAGE
1563 bool "Support OP-TEE Trusted OS image in SPL"
1566 OP-TEE is an open source Trusted OS which is loaded by SPL.
1567 More detail at: https://github.com/OP-TEE/optee_os
1570 bool "Support RISC-V OpenSBI"
1571 depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1573 OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1574 Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1575 firmware. It is loaded and started by U-Boot SPL.
1577 More details are available at https://github.com/riscv/opensbi and
1578 https://github.com/riscv/riscv-sbi-doc
1580 config SPL_OPENSBI_LOAD_ADDR
1581 hex "OpenSBI load address"
1582 depends on SPL_OPENSBI
1584 Load address of the OpenSBI binary.
1587 string "Addtional build targets for 'make'"
1588 default "spl/u-boot-spl.srec" if RCAR_GEN2
1589 default "spl/u-boot-spl.scif" if RCAR_GEN3
1592 On some platforms we need to have 'make' run additional build target
1593 rules. If required on your platform, enter it here, otherwise leave blank.
1597 depends on SUPPORT_TPL
1600 If you want to build TPL as well as the normal image and SPL, say Y.
1604 config TPL_SIZE_LIMIT
1605 hex "Maximum size of TPL image"
1609 Specifies the maximum length of the U-Boot TPL image.
1610 If this value is zero, it is ignored.
1612 config TPL_BINMAN_SYMBOLS
1613 bool "Declare binman symbols in TPL"
1614 depends on SPL_FRAMEWORK && BINMAN
1617 This enables use of symbols in TPL which refer to U-Boot, enabling TPL
1618 to obtain the location of U-Boot simply by calling spl_get_image_pos()
1619 and spl_get_image_size().
1621 For this to work, you must have a U-Boot image in the binman image, so
1622 binman can update TPL with the location of it.
1624 config TPL_FRAMEWORK
1625 bool "Support TPL based upon the common SPL framework"
1626 default y if SPL_FRAMEWORK
1628 Enable the SPL framework under common/spl/ for TPL builds.
1629 This framework supports MMC, NAND and YMODEM and other methods
1630 loading of U-Boot's SPL stage. If unsure, say Y.
1633 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1634 depends on HANDOFF && TPL_BLOBLIST
1637 This option enables TPL to write handoff information. This can be
1638 used to pass information like the size of SDRAM from TPL to U-Boot
1639 proper. The information is also available to SPL if it is useful
1642 config TPL_BOARD_INIT
1643 bool "Call board-specific initialization in TPL"
1645 If this option is enabled, U-Boot will call the function
1646 spl_board_init() from board_init_r(). This function should be
1647 provided by the board.
1649 config TPL_BOOTCOUNT_LIMIT
1650 bool "Support bootcount in TPL"
1651 depends on TPL_ENV_SUPPORT
1653 If this option is enabled, the TPL will support bootcount.
1654 For example, it may be useful to choose the device to boot.
1657 string "Linker script for the TPL stage"
1659 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1660 default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
1662 The TPL stage will usually require a different linker-script
1663 (as it runs from a different memory region) than the regular
1664 U-Boot stage. Set this to the path of the linker-script to
1667 May be left empty to trigger the Makefile infrastructure to
1668 fall back to the linker-script used for the SPL stage.
1670 config TPL_NEEDS_SEPARATE_STACK
1671 bool "TPL needs a separate initial stack-pointer"
1674 Enable, if the TPL stage should not inherit its initial
1675 stack-pointer from the settings for the SPL stage.
1678 bool "Support power drivers"
1680 Enable support for power control in TPL. This includes support
1681 for PMICs (Power-management Integrated Circuits) and some of the
1682 features provided by PMICs. In particular, voltage regulators can
1683 be used to enable/disable power and vary its voltage. That can be
1684 useful in TPL to turn on boot peripherals and adjust CPU voltage
1685 so that the clock speed can be increased. This enables the drivers
1686 in drivers/power, drivers/power/pmic and drivers/power/regulator
1687 as part of an TPL build.
1689 config TPL_TEXT_BASE
1690 hex "Base address for the .text section of the TPL stage"
1693 The base address for the .text section of the TPL stage.
1696 hex "Maximum size (in bytes) for the TPL stage"
1697 default 0x2e000 if ROCKCHIP_RK3399
1698 default 0x8000 if ROCKCHIP_RK3288
1699 default 0x7000 if ROCKCHIP_RK322X || ROCKCHIP_RK3328 || ROCKCHIP_RK3368
1700 default 0x2800 if ROCKCHIP_PX30
1703 The maximum size (in bytes) of the TPL stage.
1706 hex "Offset to which the TPL should be padded before appending the TPL payload"
1707 depends on !TPL_FRAMEWORK && PPC
1708 default TPL_MAX_SIZE
1710 Image offset to which the TPL should be padded before appending the
1711 TPL payload. By default, this is defined as CONFIG_TPL_MAX_SIZE, or 0 if
1712 CONFIG_TPL_MAX_SIZE is undefined. CONFIG_TPL_PAD_TO must be either
1713 0, meaning to append the TPL payload without any padding, or >=
1714 CONFIG_TPL_MAX_SIZE.
1717 hex "Address of the initial stack-pointer for the TPL stage"
1718 depends on TPL_NEEDS_SEPARATE_STACK
1720 The address of the initial stack-pointer for the TPL stage.
1721 Usually this will be the (aligned) top-of-stack.
1723 config TPL_READ_ONLY
1725 depends on TPL_OF_PLATDATA
1726 select TPL_OF_PLATDATA_NO_BIND
1727 select TPL_OF_PLATDATA_RT
1729 Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
1730 section of memory. This means that of-platdata must make a copy (in
1731 writeable memory) of anything it wants to modify, such as
1732 device-private data.
1734 config TPL_BOOTROM_SUPPORT
1735 bool "Support returning to the BOOTROM (from TPL)"
1737 Some platforms (e.g. the Rockchip RK3368) provide support in their
1738 ROM for loading the next boot-stage after performing basic setup
1741 Enable this option, to return to the BOOTROM through the
1742 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1743 boot device list, if not implemented for a given board)
1746 bool "Support CRC32 in TPL"
1747 default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
1749 Enable this to support CRC32 in uImages or FIT images within SPL.
1750 This is a 32-bit checksum value that can be used to verify images.
1751 For FIT images, this is the least secure type of checksum, suitable
1752 for detected accidental image corruption. For secure applications you
1753 should consider SHA1 or SHA256.
1755 config TPL_DRIVERS_MISC
1756 bool "Support misc drivers in TPL"
1758 Enable miscellaneous drivers in TPL. These drivers perform various
1759 tasks that don't fall nicely into other categories, Enable this
1760 option to build the drivers in drivers/misc as part of an TPL
1761 build, for those that support building in TPL (not all drivers do).
1763 config TPL_ENV_SUPPORT
1764 bool "Support an environment"
1766 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1769 bool "Support GPIO in TPL"
1771 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1772 GPIOs allow U-Boot to read the state of an input line (high or
1773 low) and set the state of an output line. This can be used to
1774 drive LEDs, control power to various system parts and read user
1775 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1776 for example. Enable this option to build the drivers in
1777 drivers/gpio as part of an TPL build.
1782 Enable support for the I2C bus in TPL. See SPL_I2C for
1785 config TPL_LIBCOMMON_SUPPORT
1786 bool "Support common libraries"
1788 Enable support for common U-Boot libraries within TPL. See
1789 SPL_LIBCOMMON_SUPPORT for details.
1791 config TPL_LIBGENERIC_SUPPORT
1792 bool "Support generic libraries"
1794 Enable support for generic U-Boot libraries within TPL. See
1795 SPL_LIBGENERIC_SUPPORT for details.
1797 config TPL_MPC8XXX_INIT_DDR
1798 bool "Support MPC8XXX DDR init"
1800 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1801 SPL_MPC8XXX_INIT_DDR for details.
1807 Enable support for MMC within TPL. See SPL_MMC for details.
1809 config TPL_NAND_SUPPORT
1810 bool "Support NAND flash"
1812 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1815 bool "Support PCI drivers"
1817 Enable support for PCI in TPL. For platforms that need PCI to boot,
1818 or must perform some init using PCI in SPL, this provides the
1819 necessary driver support. This enables the drivers in drivers/pci
1820 as part of a TPL build.
1823 bool "Support PCH drivers"
1825 Enable support for PCH (Platform Controller Hub) devices in TPL.
1826 These are used to set up GPIOs and the SPI peripheral early in
1827 boot. This enables the drivers in drivers/pch as part of a TPL
1830 config TPL_RAM_SUPPORT
1831 bool "Support booting from RAM"
1833 Enable booting of an image in RAM. The image can be preloaded or
1834 it can be loaded by TPL directly into RAM (e.g. using USB).
1836 config TPL_RAM_DEVICE
1837 bool "Support booting from preloaded image in RAM"
1838 depends on TPL_RAM_SUPPORT
1840 Enable booting of an image already loaded in RAM. The image has to
1841 be already in memory when TPL takes over, e.g. loaded by the boot
1845 bool "Support RTC drivers"
1847 Enable RTC (Real-time Clock) support in TPL. This includes support
1848 for reading and setting the time. Some RTC devices also have some
1849 non-volatile (battery-backed) memory which is accessible if
1850 needed. This enables the drivers in drivers/rtc as part of an TPL
1854 bool "Support serial"
1858 Enable support for serial in TPL. See SPL_SERIAL for
1861 config TPL_SPI_FLASH_SUPPORT
1862 bool "Support SPI flash drivers"
1864 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1867 config TPL_SPI_FLASH_TINY
1868 bool "Enable low footprint TPL SPI Flash support"
1869 depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
1870 default y if SPI_FLASH
1872 Enable lightweight TPL SPI Flash support that supports just reading
1873 data/images from flash. No support to write/erase flash. Enable
1874 this if you have TPL size limitations and don't need full-fledged
1878 bool "Support loading from SPI flash"
1879 depends on TPL_SPI_FLASH_SUPPORT
1881 Enable support for loading next stage, U-Boot or otherwise, from
1882 SPI NOR in U-Boot TPL.
1885 bool "Support SPI drivers"
1887 Enable support for using SPI in TPL. See SPL_SPI for
1891 bool "Support SPI DM drivers in TPL"
1893 Enable support for SPI DM drivers in TPL.
1895 config TPL_DM_SPI_FLASH
1896 bool "Support SPI DM FLASH drivers in TPL"
1898 Enable support for SPI DM flash drivers in TPL.
1900 config TPL_YMODEM_SUPPORT
1901 bool "Support loading using Ymodem"
1902 depends on TPL_SERIAL
1904 While loading from serial is slow it can be a useful backup when
1905 there is no other option. The Ymodem protocol provides a reliable
1906 means of transmitting U-Boot over a serial line for using in TPL,
1907 with a checksum to ensure correctness.
1913 depends on SUPPORT_SPL
1916 If you want to build VPL as well as the normal image, TPL and SPL,
1921 config VPL_BANNER_PRINT
1922 bool "Enable output of the VPL banner 'U-Boot VPL ...'"
1926 If this option is enabled, VPL will print the banner with version
1927 info. Disabling this option could be useful to reduce VPL boot time
1928 (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
1930 config VPL_BOARD_INIT
1931 bool "Call board-specific initialization in VPL"
1933 If this option is enabled, U-Boot will call the function
1934 spl_board_init() from board_init_r(). This function should be
1935 provided by the board.
1939 bool "Support cache drivers in VPL"
1941 Enable support for cache drivers in VPL.
1944 bool "Support CRC32 in VPL"
1945 default y if VPL_ENV_SUPPORT || VPL_BLOBLIST
1947 Enable this to support CRC32 in uImages or FIT images within VPL.
1948 This is a 32-bit checksum value that can be used to verify images.
1949 For FIT images, this is the least secure type of checksum, suitable
1950 for detected accidental image corruption. For secure applications you
1951 should consider SHA1 or SHA256.
1954 bool "Support SPI DM drivers in VPL"
1956 Enable support for SPI DM drivers in VPL.
1958 config VPL_DM_SPI_FLASH
1959 bool "Support SPI DM FLASH drivers in VPL"
1961 Enable support for SPI DM flash drivers in VPL.
1963 config VPL_FRAMEWORK
1964 bool "Support VPL based upon the common SPL framework"
1967 Enable the SPL framework under common/spl/ for VPL builds.
1968 This framework supports MMC, NAND and YMODEM and other methods
1969 loading of U-Boot's next stage. If unsure, say Y.
1972 bool "Pass hand-off information from VPL to SPL"
1973 depends on HANDOFF && VPL_BLOBLIST
1976 This option enables VPL to write handoff information. This can be
1977 used to pass information like the size of SDRAM from VPL to SPL. Also
1978 VPL can receive information from TPL in the same place if that is
1981 config VPL_LIBCOMMON_SUPPORT
1982 bool "Support common libraries"
1983 default y if SPL_LIBCOMMON_SUPPORT
1985 Enable support for common U-Boot libraries within VPL. See
1986 SPL_LIBCOMMON_SUPPORT for details.
1988 config VPL_LIBGENERIC_SUPPORT
1989 bool "Support generic libraries"
1990 default y if SPL_LIBGENERIC_SUPPORT
1992 Enable support for generic U-Boot libraries within VPL. These
1993 libraries include generic code to deal with device tree, hashing,
1994 printf(), compression and the like. This option is enabled on many
1995 boards. Enable this option to build the code in lib/ as part of a
1998 config VPL_DRIVERS_MISC
1999 bool "Support misc drivers"
2000 default y if TPL_DRIVERS_MISC
2002 Enable miscellaneous drivers in VPL. These drivers perform various
2003 tasks that don't fall nicely into other categories, Enable this
2004 option to build the drivers in drivers/misc as part of a VPL
2005 build, for those that support building in VPL (not all drivers do).
2007 config VPL_ENV_SUPPORT
2008 bool "Support an environment"
2010 Enable environment support in VPL. The U-Boot environment provides
2011 a number of settings (essentially name/value pairs) which can
2012 control many aspects of U-Boot's operation. Enabling this option will
2013 make env_get() and env_set() available in VSPL.
2016 bool "Support GPIO in VPL"
2017 default y if SPL_GPIO
2019 Enable support for GPIOs (General-purpose Input/Output) in VPL.
2020 GPIOs allow U-Boot to read the state of an input line (high or
2021 low) and set the state of an output line. This can be used to
2022 drive LEDs, control power to various system parts and read user
2023 input. GPIOs can be useful in VPL to enable a 'sign-of-life' LED,
2024 for example. Enable this option to build the drivers in
2025 drivers/gpio as part of a VPL build.
2028 bool "Pass hand-off information from VPL to SPL and U-Boot proper"
2029 depends on HANDOFF && VPL_BLOBLIST
2032 This option enables VPL to write handoff information. This can be
2033 used to pass information like the size of SDRAM from VPL to U-Boot
2034 proper. The information is also available to VPL if it is useful
2038 bool "Support hashing drivers in VPL"
2043 Enable hashing drivers in VPL. These drivers can be used to
2044 accelerate secure boot processing in secure applications. Enable
2045 this option to build system-specific drivers for hash acceleration
2046 as part of a VPL build.
2048 config VPL_I2C_SUPPORT
2049 bool "Support I2C in VPL"
2050 default y if SPL_I2C_SUPPORT
2052 Enable support for the I2C bus in VPL. Vee SPL_I2C_SUPPORT for
2055 config VPL_PCH_SUPPORT
2056 bool "Support PCH drivers"
2057 default y if TPL_PCH_SUPPORT
2059 Enable support for PCH (Platform Controller Hub) devices in VPL.
2060 These are used to set up GPIOs and the SPI peripheral early in
2061 boot. This enables the drivers in drivers/pch as part of a VPL
2065 bool "Support PCI drivers"
2066 default y if SPL_PCI
2068 Enable support for PCI in VPL. For platforms that need PCI to boot,
2069 or must perform some init using PCI in VPL, this provides the
2070 necessary driver support. This enables the drivers in drivers/pci
2071 as part of a VPL build.
2074 bool "Support RTC drivers"
2076 Enable RTC (Real-time Clock) support in VPL. This includes support
2077 for reading and setting the time. Some RTC devices also have some
2078 non-volatile (battery-backed) memory which is accessible if
2079 needed. This enables the drivers in drivers/rtc as part of a VPL
2083 bool "Support serial"
2084 default y if TPL_SERIAL
2088 Enable support for serial in VPL. See SPL_SERIAL_SUPPORT for
2091 config VPL_SIZE_LIMIT
2092 hex "Maximum size of VPL image"
2096 Specifies the maximum length of the U-Boot VPL image.
2097 If this value is zero, it is ignored.
2100 bool "Support SPI drivers"
2102 Enable support for using SPI in VPL. See SPL_SPI_SUPPORT for
2105 config VPL_SPI_FLASH_SUPPORT
2106 bool "Support SPI flash drivers"
2108 Enable support for using SPI flash in VPL, and loading U-Boot from
2109 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
2110 the SPI bus that is used to connect it to a system. It is a simple
2111 but fast bidirectional 4-wire bus (clock, chip select and two data
2112 lines). This enables the drivers in drivers/mtd/spi as part of a
2113 VPL build. This normally requires VPL_SPI_SUPPORT.
2115 config VPL_TEXT_BASE
2119 The address in memory that VPL will be running from.
2123 config SPL_AT91_MCK_BYPASS
2124 bool "Use external clock signal as a source of main clock for AT91 platforms"
2125 depends on ARCH_AT91
2127 Use external 8 to 24 Mhz clock signal as source of main clock instead
2128 of an external crystal oscillator.
2129 This option disables the internal driving on the XOUT pin.
2130 The external source has to provide a stable clock on the XIN pin.
2131 If this option is disabled, the SoC expects a crystal oscillator
2132 that needs driving on both XIN and XOUT lines.