9 config SPL_DFU_NO_RESET
14 depends on SUPPORT_SPL
17 If you want to build SPL as well as the normal image, say Y.
22 string "Linker script for the SPL stage"
23 default "arch/$(ARCH)/cpu/u-boot-spl.lds"
26 The SPL stage will usually require a different linker-script
27 (as it runs from a different memory region) than the regular
28 U-Boot stage. Set this to the path of the linker-script to
32 bool "Call board-specific initialization in SPL"
34 If this option is enabled, U-Boot will call the function
35 spl_board_init() from board_init_r(). This function should be
36 provided by the board.
38 config SPL_BOOTROM_SUPPORT
39 bool "Support returning to the BOOTROM"
41 Some platforms (e.g. the Rockchip RK3368) provide support in their
42 ROM for loading the next boot-stage after performing basic setup
45 Enable this option, to return to the BOOTROM through the
46 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
47 boot device list, if not implemented for a given board)
49 config SPL_RAW_IMAGE_SUPPORT
50 bool "Support SPL loading and booting of RAW images"
51 default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
52 default y if !TI_SECURE_DEVICE
54 SPL will support loading and booting a RAW image when this option
55 is y. If this is not set, SPL will move on to other available
56 boot media to find a suitable image.
58 config SPL_LEGACY_IMAGE_SUPPORT
59 bool "Support SPL loading and booting of Legacy images"
60 default y if !TI_SECURE_DEVICE
62 SPL will support loading and booting Legacy images when this option
63 is y. If this is not set, SPL will move on to other available
64 boot media to find a suitable image.
66 config SPL_SYS_MALLOC_SIMPLE
68 prompt "Only use malloc_simple functions in the SPL"
70 Say Y here to only use the *_simple malloc functions from
71 malloc_simple.c, rather then using the versions from dlmalloc.c;
72 this will make the SPL binary smaller at the cost of more heap
73 usage as the *_simple malloc functions do not re-use free-ed mem.
75 config TPL_SYS_MALLOC_SIMPLE
77 prompt "Only use malloc_simple functions in the TPL"
79 Say Y here to only use the *_simple malloc functions from
80 malloc_simple.c, rather then using the versions from dlmalloc.c;
81 this will make the TPL binary smaller at the cost of more heap
82 usage as the *_simple malloc functions do not re-use free-ed mem.
85 bool "Enable SDRAM location for SPL stack"
87 SPL starts off execution in SRAM and thus typically has only a small
88 stack available. Since SPL sets up DRAM while in its board_init_f()
89 function, it is possible for the stack to move there before
90 board_init_r() is reached. This option enables a special SDRAM
91 location for the SPL stack. U-Boot SPL switches to this after
92 board_init_f() completes, and before board_init_r() starts.
94 config SPL_STACK_R_ADDR
95 depends on SPL_STACK_R
96 hex "SDRAM location for SPL stack"
97 default 0x82000000 if ARCH_OMAP2PLUS
99 Specify the address in SDRAM for the SPL stack. This will be set up
100 before board_init_r() is called.
102 config SPL_STACK_R_MALLOC_SIMPLE_LEN
103 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
104 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
107 Specify the amount of the stack to use as memory pool for
108 malloc_simple after switching the stack to DRAM. This may be set
109 to give board_init_r() a larger heap then the initial heap in
110 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
112 config SPL_SEPARATE_BSS
113 bool "BSS section is in a different memory region from text"
115 Some platforms need a large BSS region in SPL and can provide this
116 because RAM is already set up. In this case BSS can be moved to RAM.
117 This option should then be enabled so that the correct device tree
118 location is used. Normally we put the device tree at the end of BSS
119 but with this option enabled, it goes at _image_binary_end.
121 config SPL_DISABLE_BANNER_PRINT
122 bool "Disable output of the SPL banner 'U-Boot SPL ...'"
124 If this option is enabled, SPL will not print the banner with version
125 info. Selecting this option could be useful to reduce SPL boot time
126 (e.g. approx. 6 ms slower, when output on i.MX6 with 115200 baud).
128 config SPL_DISPLAY_PRINT
129 bool "Display a board-specific message in SPL"
131 If this option is enabled, U-Boot will call the function
132 spl_display_print() immediately after displaying the SPL console
133 banner ("U-Boot SPL ..."). This function should be provided by
136 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
137 bool "MMC raw mode: by sector"
138 default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER ||ARCH_MX6 || \
139 ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
140 ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
141 OMAP44XX || OMAP54XX || AM33XX || AM43XX
143 Use sector number for specifying U-Boot location on MMC/SD in
146 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
147 hex "Address on the MMC to load U-Boot from"
148 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
149 default 0x50 if ARCH_SUNXI
150 default 0x75 if ARCH_DAVINCI
151 default 0x8a if ARCH_MX6
152 default 0x100 if ARCH_UNIPHIER
153 default 0x140 if ARCH_MVEBU
154 default 0x200 if ARCH_SOCFPGA || ARCH_AT91
155 default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
156 OMAP54XX || AM33XX || AM43XX
157 default 0x4000 if ARCH_ROCKCHIP
159 Address on the MMC to load U-Boot from, when the MMC is being used
160 in raw mode. Units: MMC sectors (1 sector = 512 bytes).
162 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
163 bool "MMC Raw mode: by partition"
165 Use a partition for loading U-Boot when using MMC/SD in raw mode.
167 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
168 hex "Partition to use to load U-Boot from"
169 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
172 Partition on the MMC to load U-Boot from when the MMC is being
175 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
176 bool "MMC raw mode: by partition type"
177 depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
179 Use partition type for specifying U-Boot partition on MMC/SD in
180 raw mode. U-Boot will be loaded from the first partition of this
183 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
184 hex "Partition Type on the MMC to load U-Boot from"
185 depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
187 Partition Type on the MMC to load U-Boot from, when the MMC is being
190 config SPL_CRC32_SUPPORT
194 Enable this to support CRC32 in FIT images within SPL. This is a
195 32-bit checksum value that can be used to verify images. This is
196 the least secure type of checksum, suitable for detected
197 accidental image corruption. For secure applications you should
198 consider SHA1 or SHA256.
200 config SPL_MD5_SUPPORT
204 Enable this to support MD5 in FIT images within SPL. An MD5
205 checksum is a 128-bit hash value used to check that the image
206 contents have not been corrupted. Note that MD5 is not considered
207 secure as it is possible (with a brute-force attack) to adjust the
208 image while still retaining the same MD5 hash value. For secure
209 applications where images may be changed maliciously, you should
210 consider SHA1 or SHA256.
212 config SPL_SHA1_SUPPORT
217 Enable this to support SHA1 in FIT images within SPL. A SHA1
218 checksum is a 160-bit (20-byte) hash value used to check that the
219 image contents have not been corrupted or maliciously altered.
220 While SHA1 is fairly secure it is coming to the end of its life
221 due to the expanding computing power avaiable to brute-force
222 attacks. For more security, consider SHA256.
224 config SPL_SHA256_SUPPORT
225 bool "Support SHA256"
229 Enable this to support SHA256 in FIT images within SPL. A SHA256
230 checksum is a 256-bit (32-byte) hash value used to check that the
231 image contents have not been corrupted. SHA256 is recommended for
232 use in secure applications since (as at 2016) there is no known
233 feasible attack that could produce a 'collision' with differing
234 input data. Use this for the highest security. Note that only the
235 SHA256 variant is supported: SHA512 and others are not currently
238 config SPL_FIT_IMAGE_TINY
239 bool "Remove functionality from SPL FIT loading to reduce size"
241 default y if MACH_SUN50I || MACH_SUN50I_H5
243 Enable this to reduce the size of the FIT image loading code
244 in SPL, if space for the SPL binary is very tight.
246 This removes the detection of image types (which forces the
247 first image to be treated as having a U-Boot style calling
248 convention) and skips the recording of each loaded payload
249 (i.e. loadable) into the FDT (modifying the loaded FDT to
250 ensure this information is available to the next image
253 config SPL_CPU_SUPPORT
254 bool "Support CPU drivers"
256 Enable this to support CPU drivers in SPL. These drivers can set
257 up CPUs and provide information about them such as the model and
258 name. This can be useful in SPL since setting up the CPUs earlier
259 may improve boot performance. Enable this option to build the
260 drivers in drivers/cpu as part of an SPL build.
262 config SPL_CRYPTO_SUPPORT
263 bool "Support crypto drivers"
265 Enable crypto drivers in SPL. These drivers can be used to
266 accelerate secure boot processing in secure applications. Enable
267 this option to build the drivers in drivers/crypto as part of an
270 config SPL_HASH_SUPPORT
271 bool "Support hashing drivers"
275 Enable hashing drivers in SPL. These drivers can be used to
276 accelerate secure boot processing in secure applications. Enable
277 this option to build system-specific drivers for hash acceleration
278 as part of an SPL build.
280 config SPL_DMA_SUPPORT
281 bool "Support DMA drivers"
283 Enable DMA (direct-memory-access) drivers in SPL. These drivers
284 can be used to handle memory-to-peripheral data transfer without
285 the CPU moving the data. Enable this option to build the drivers
286 in drivers/dma as part of an SPL build.
288 config SPL_DRIVERS_MISC_SUPPORT
289 bool "Support misc drivers"
291 Enable miscellaneous drivers in SPL. These drivers perform various
292 tasks that don't fall nicely into other categories, Enable this
293 option to build the drivers in drivers/misc as part of an SPL
294 build, for those that support building in SPL (not all drivers do).
296 config SPL_ENV_SUPPORT
297 bool "Support an environment"
299 Enable environment support in SPL. The U-Boot environment provides
300 a number of settings (essentially name/value pairs) which can
301 control many aspects of U-Boot's operation. Normally this is not
302 needed in SPL as it has a much simpler task with less
303 configuration. But some boards use this to support 'Falcon' boot
304 on EXT2 and FAT, where SPL boots directly into Linux without
305 starting U-Boot first. Enabling this option will make env_get()
306 and env_set() available in SPL.
309 bool "Support save environment"
310 depends on SPL_ENV_SUPPORT
311 select SPL_MMC_WRITE if ENV_IS_IN_MMC
313 Enable save environment support in SPL after setenv. By default
314 the saveenv option is not provided in SPL, but some boards need
315 this support in 'Falcon' boot, where SPL need to boot from
316 different images based on environment variable set by OS. For
317 example OS may set "reboot_image" environment variable to
318 "recovery" inorder to boot recovery image by SPL. The SPL read
319 "reboot_image" and act accordingly and change the reboot_image
320 to default mode using setenv and save the environemnt.
322 config SPL_ETH_SUPPORT
323 bool "Support Ethernet"
324 depends on SPL_ENV_SUPPORT
326 Enable access to the network subsystem and associated Ethernet
327 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
328 link rather than from an on-board peripheral. Environment support
329 is required since the network stack uses a number of environment
330 variables. See also SPL_NET_SUPPORT.
332 config SPL_EXT_SUPPORT
333 bool "Support EXT filesystems"
335 Enable support for EXT2/3/4 filesystems with SPL. This permits
336 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
337 filesystem from within SPL. Support for the underlying block
338 device (e.g. MMC or USB) must be enabled separately.
340 config SPL_FAT_SUPPORT
341 bool "Support FAT filesystems"
344 Enable support for FAT and VFAT filesystems with SPL. This
345 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
346 filesystem from within SPL. Support for the underlying block
347 device (e.g. MMC or USB) must be enabled separately.
349 config SPL_FPGA_SUPPORT
352 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
353 provide software-configurable hardware which is typically used to
354 implement peripherals (such as UARTs, LCD displays, MMC) or
355 accelerate custom processing functions, such as image processing
356 or machine learning. Sometimes it is useful to program the FPGA
357 as early as possible during boot, and this option can enable that
360 config SPL_GPIO_SUPPORT
363 Enable support for GPIOs (General-purpose Input/Output) in SPL.
364 GPIOs allow U-Boot to read the state of an input line (high or
365 low) and set the state of an output line. This can be used to
366 drive LEDs, control power to various system parts and read user
367 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
368 for example. Enable this option to build the drivers in
369 drivers/gpio as part of an SPL build.
371 config SPL_I2C_SUPPORT
374 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
375 I2C works with a clock and data line which can be driven by a
376 one or more masters or slaves. It is a fairly complex bus but is
377 widely used as it only needs two lines for communication. Speeds of
378 400kbps are typical but up to 3.4Mbps is supported by some
379 hardware. I2C can be useful in SPL to configure power management
380 ICs (PMICs) before raising the CPU clock speed, for example.
381 Enable this option to build the drivers in drivers/i2c as part of
384 config SPL_LIBCOMMON_SUPPORT
385 bool "Support common libraries"
387 Enable support for common U-Boot libraries within SPL. These
388 libraries include common code to deal with U-Boot images,
389 environment and USB, for example. This option is enabled on many
390 boards. Enable this option to build the code in common/ as part of
393 config SPL_LIBDISK_SUPPORT
394 bool "Support disk paritions"
396 Enable support for disk partitions within SPL. 'Disk' is something
397 of a misnomer as it includes non-spinning media such as flash (as
398 used in MMC and USB sticks). Partitions provide a way for a disk
399 to be split up into separate regions, with a partition table placed
400 at the start or end which describes the location and size of each
401 'partition'. These partitions are typically uses as individual block
402 devices, typically with an EXT2 or FAT filesystem in each. This
403 option enables whatever partition support has been enabled in
404 U-Boot to also be used in SPL. It brings in the code in disk/.
406 config SPL_LIBGENERIC_SUPPORT
407 bool "Support generic libraries"
409 Enable support for generic U-Boot libraries within SPL. These
410 libraries include generic code to deal with device tree, hashing,
411 printf(), compression and the like. This option is enabled on many
412 boards. Enable this option to build the code in lib/ as part of an
415 config SPL_MMC_SUPPORT
419 Enable support for MMC (Multimedia Card) within SPL. This enables
420 the MMC protocol implementation and allows any enabled drivers to
421 be used within SPL. MMC can be used with or without disk partition
422 support depending on the application (SPL_LIBDISK_SUPPORT). Enable
423 this option to build the drivers in drivers/mmc as part of an SPL
427 bool "MMC/SD/SDIO card support for write operations in SPL"
428 depends on SPL_MMC_SUPPORT
431 Enable write access to MMC and SD Cards in SPL
434 config SPL_MPC8XXX_INIT_DDR_SUPPORT
435 bool "Support MPC8XXX DDR init"
437 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
438 random-access memory) on the MPC8XXX family within SPL. This
439 allows DRAM to be set up before loading U-Boot into that DRAM,
442 config SPL_MTD_SUPPORT
443 bool "Support MTD drivers"
445 Enable support for MTD (Memory Technology Device) within SPL. MTD
446 provides a block interface over raw NAND and can also be used with
447 SPI flash. This allows SPL to load U-Boot from supported MTD
448 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
449 to enable specific MTD drivers.
451 config SPL_MUSB_NEW_SUPPORT
452 bool "Support new Mentor Graphics USB"
454 Enable support for Mentor Graphics USB in SPL. This is a new
455 driver used by some boards. Enable this option to build
456 the drivers in drivers/usb/musb-new as part of an SPL build. The
457 old drivers are in drivers/usb/musb.
459 config SPL_NAND_SUPPORT
460 bool "Support NAND flash"
462 Enable support for NAND (Negative AND) flash in SPL. NAND flash
463 can be used to allow SPL to load U-Boot from supported devices.
464 This enables the drivers in drivers/mtd/nand as part of an SPL
467 config SPL_NET_SUPPORT
468 bool "Support networking"
470 Enable support for network devices (such as Ethernet) in SPL.
471 This permits SPL to load U-Boot over a network link rather than
472 from an on-board peripheral. Environment support is required since
473 the network stack uses a number of environment variables. See also
477 config SPL_NET_VCI_STRING
478 string "BOOTP Vendor Class Identifier string sent by SPL"
480 As defined by RFC 2132 the vendor class identifier field can be
481 sent by the client to identify the vendor type and configuration
482 of a client. This is often used in practice to allow for the DHCP
483 server to specify different files to load depending on if the ROM,
484 SPL or U-Boot itself makes the request
485 endif # if SPL_NET_SUPPORT
487 config SPL_NO_CPU_SUPPORT
488 bool "Drop CPU code in SPL"
490 This is specific to the ARM926EJ-S CPU. It disables the standard
491 start.S start-up code, presumably so that a replacement can be
492 used on that CPU. You should not enable it unless you know what
495 config SPL_NOR_SUPPORT
496 bool "Support NOR flash"
498 Enable support for loading U-Boot from memory-mapped NOR (Negative
499 OR) flash in SPL. NOR flash is slow to write but fast to read, and
500 a memory-mapped device makes it very easy to access. Loading from
501 NOR is typically achieved with just a memcpy().
503 config SPL_XIP_SUPPORT
507 Enable support for execute in place of U-Boot or kernel image. There
508 is no need to copy image from flash to ram if flash supports execute
509 in place. Its very useful in systems having enough flash but not
510 enough ram to load the image.
512 config SPL_ONENAND_SUPPORT
513 bool "Support OneNAND flash"
515 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
516 a type of NAND flash and therefore can be used to allow SPL to
517 load U-Boot from supported devices. This enables the drivers in
518 drivers/mtd/onenand as part of an SPL build.
521 bool "Activate Falcon Mode"
522 depends on !TI_SECURE_DEVICE
525 Enable booting directly to an OS from SPL.
526 for more info read doc/README.falcon
530 hex "addr, where OS is found"
531 depends on SPL_NOR_SUPPORT
533 Specify the address, where the OS image is found, which
538 config SPL_PCI_SUPPORT
539 bool "Support PCI drivers"
541 Enable support for PCI in SPL. For platforms that need PCI to boot,
542 or must perform some init using PCI in SPL, this provides the
543 necessary driver support. This enables the drivers in drivers/pci
544 as part of an SPL build.
546 config SPL_PCH_SUPPORT
547 bool "Support PCH drivers"
549 Enable support for PCH (Platform Controller Hub) devices in SPL.
550 These are used to set up GPIOs and the SPI peripheral early in
551 boot. This enables the drivers in drivers/pch as part of an SPL
554 config SPL_POST_MEM_SUPPORT
555 bool "Support POST drivers"
557 Enable support for POST (Power-on Self Test) in SPL. POST is a
558 procedure that checks that the hardware (CPU or board) appears to
559 be functionally correctly. It is a sanity check that can be
560 performed before booting. This enables the drivers in post/drivers
561 as part of an SPL build.
563 config SPL_POWER_SUPPORT
564 bool "Support power drivers"
566 Enable support for power control in SPL. This includes support
567 for PMICs (Power-management Integrated Circuits) and some of the
568 features provided by PMICs. In particular, voltage regulators can
569 be used to enable/disable power and vary its voltage. That can be
570 useful in SPL to turn on boot peripherals and adjust CPU voltage
571 so that the clock speed can be increased. This enables the drivers
572 in drivers/power, drivers/power/pmic and drivers/power/regulator
573 as part of an SPL build.
575 config SPL_RAM_SUPPORT
576 bool "Support booting from RAM"
577 default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
579 Enable booting of an image in RAM. The image can be preloaded or
580 it can be loaded by SPL directly into RAM (e.g. using USB).
582 config SPL_RAM_DEVICE
583 bool "Support booting from preloaded image in RAM"
584 depends on SPL_RAM_SUPPORT
585 default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
587 Enable booting of an image already loaded in RAM. The image has to
588 be already in memory when SPL takes over, e.g. loaded by the boot
591 config SPL_RTC_SUPPORT
592 bool "Support RTC drivers"
594 Enable RTC (Real-time Clock) support in SPL. This includes support
595 for reading and setting the time. Some RTC devices also have some
596 non-volatile (battery-backed) memory which is accessible if
597 needed. This enables the drivers in drivers/rtc as part of an SPL
600 config SPL_SATA_SUPPORT
601 bool "Support loading from SATA"
603 Enable support for SATA (Serial AT attachment) in SPL. This allows
604 use of SATA devices such as hard drives and flash drivers for
605 loading U-Boot. SATA is used in higher-end embedded systems and
606 can provide higher performance than MMC , at somewhat higher
607 expense and power consumption. This enables loading from SATA
608 using a configured device.
610 config SPL_SERIAL_SUPPORT
611 bool "Support serial"
613 Enable support for serial in SPL. This allows use of a serial UART
614 for displaying messages while SPL is running. It also brings in
615 printf() and panic() functions. This should normally be enabled
616 unless there are space reasons not to. Even then, consider
617 enabling USE_TINY_PRINTF which is a small printf() version.
619 config SPL_SPI_FLASH_SUPPORT
620 bool "Support SPI flash drivers"
622 Enable support for using SPI flash in SPL, and loading U-Boot from
623 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
624 the SPI bus that is used to connect it to a system. It is a simple
625 but fast bidirectional 4-wire bus (clock, chip select and two data
626 lines). This enables the drivers in drivers/mtd/spi as part of an
627 SPL build. This normally requires SPL_SPI_SUPPORT.
629 config SPL_SPI_SUPPORT
630 bool "Support SPI drivers"
632 Enable support for using SPI in SPL. This is used for connecting
633 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
634 more details on that. The SPI driver provides the transport for
635 data between the SPI flash and the CPU. This option can be used to
636 enable SPI drivers that are needed for other purposes also, such
640 bool "Driver support for thermal devices"
642 Enable support for temperature-sensing devices. Some SoCs have on-chip
643 temperature sensors to permit warnings, speed throttling or even
644 automatic power-off when the temperature gets too high or low. Other
645 devices may be discrete but connected on a suitable bus.
647 config SPL_USB_HOST_SUPPORT
648 bool "Support USB host drivers"
650 Enable access to USB (Universal Serial Bus) host devices so that
651 SPL can load U-Boot from a connected USB peripheral, such as a USB
652 flash stick. While USB takes a little longer to start up than most
653 buses, it is very flexible since many different types of storage
654 device can be attached. This option enables the drivers in
655 drivers/usb/host as part of an SPL build.
657 config SPL_USB_SUPPORT
658 bool "Support loading from USB"
659 depends on SPL_USB_HOST_SUPPORT
661 Enable support for USB devices in SPL. This allows use of USB
662 devices such as hard drives and flash drivers for loading U-Boot.
663 The actual drivers are enabled separately using the normal U-Boot
664 config options. This enables loading from USB using a configured
667 config SPL_USB_GADGET_SUPPORT
668 bool "Suppport USB Gadget drivers"
670 Enable USB Gadget API which allows to enable USB device functions
673 if SPL_USB_GADGET_SUPPORT
675 config SPL_USBETH_SUPPORT
676 bool "Support USB Ethernet drivers"
678 Enable access to the USB network subsystem and associated
679 drivers in SPL. This permits SPL to load U-Boot over a
680 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
681 than from an onboard peripheral. Environment support is required
682 since the network stack uses a number of environment variables.
683 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
685 config SPL_DFU_SUPPORT
686 bool "Support DFU (Device Firmware Upgarde)"
687 select SPL_HASH_SUPPORT
688 select SPL_DFU_NO_RESET
689 depends on SPL_RAM_SUPPORT
691 This feature enables the DFU (Device Firmware Upgarde) in SPL with
692 RAM memory device support. The ROM code will load and execute
693 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
694 selected device partition from host-pc using dfu-utils.
695 This feature is useful to flash the binaries to factory or bare-metal
696 boards using USB interface.
699 bool "DFU device selection"
700 depends on SPL_DFU_SUPPORT
704 depends on SPL_DFU_SUPPORT && SPL_RAM_SUPPORT
706 select RAM/DDR memory device for loading binary images
707 (u-boot/kernel) to the selected device partition using
708 DFU and execute the u-boot/kernel from RAM.
712 config SPL_USB_SDP_SUPPORT
713 bool "Support SDP (Serial Download Protocol)"
715 Enable Serial Download Protocol (SDP) device support in SPL. This
716 allows to download images into memory and execute (jump to) them
717 using the same protocol as implemented by the i.MX family's boot ROM.
720 config SPL_WATCHDOG_SUPPORT
721 bool "Support watchdog drivers"
723 Enable support for watchdog drivers in SPL. A watchdog is
724 typically a hardware peripheral which can reset the system when it
725 detects no activity for a while (such as a software crash). This
726 enables the drivers in drivers/watchdog as part of an SPL build.
728 config SPL_YMODEM_SUPPORT
729 bool "Support loading using Ymodem"
731 While loading from serial is slow it can be a useful backup when
732 there is no other option. The Ymodem protocol provides a reliable
733 means of transmitting U-Boot over a serial line for using in SPL,
734 with a checksum to ensure correctness.
737 bool "Support ARM Trusted Firmware"
740 ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
741 is loaded by SPL (which is considered as BL2 in ATF terminology).
742 More detail at: https://github.com/ARM-software/arm-trusted-firmware
744 config SPL_ATF_NO_PLATFORM_PARAM
745 bool "Pass no platform parameter"
748 While we expect to call a pointer to a valid FDT (or NULL)
749 as the platform parameter to an ATF, some ATF versions are
750 not U-Boot aware and have an insufficiently robust parameter
751 validation to gracefully reject a FDT being passed.
753 If this option is enabled, the spl_atf os-type handler will
754 always pass NULL for the platform parameter.
756 If your ATF is affected, say Y.
760 depends on SUPPORT_TPL
763 If you want to build TPL as well as the normal image and SPL, say Y.
767 config TPL_BOARD_INIT
768 bool "Call board-specific initialization in TPL"
770 If this option is enabled, U-Boot will call the function
771 spl_board_init() from board_init_r(). This function should be
772 provided by the board.
775 string "Linker script for the TPL stage"
778 The TPL stage will usually require a different linker-script
779 (as it runs from a different memory region) than the regular
780 U-Boot stage. Set this to the path of the linker-script to
783 May be left empty to trigger the Makefile infrastructure to
784 fall back to the linker-script used for the SPL stage.
786 config TPL_NEEDS_SEPARATE_TEXT_BASE
787 bool "TPL needs a separate text-base"
791 Enable, if the TPL stage should not inherit its text-base
792 from the SPL stage. When enabled, a base address for the
793 .text sections of the TPL stage has to be set below.
795 config TPL_NEEDS_SEPARATE_STACK
796 bool "TPL needs a separate initial stack-pointer"
800 Enable, if the TPL stage should not inherit its initial
801 stack-pointer from the settings for the SPL stage.
804 hex "Base address for the .text section of the TPL stage"
805 depends on TPL_NEEDS_SEPARATE_TEXT_BASE
807 The base address for the .text section of the TPL stage.
810 int "Maximum size (in bytes) for the TPL stage"
814 The maximum size (in bytes) of the TPL stage.
817 hex "Address of the initial stack-pointer for the TPL stage"
818 depends on TPL_NEEDS_SEPARATE_STACK
820 The address of the initial stack-pointer for the TPL stage.
821 Usually this will be the (aligned) top-of-stack.
823 config TPL_BOOTROM_SUPPORT
824 bool "Support returning to the BOOTROM (from TPL)"
826 Some platforms (e.g. the Rockchip RK3368) provide support in their
827 ROM for loading the next boot-stage after performing basic setup
830 Enable this option, to return to the BOOTROM through the
831 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
832 boot device list, if not implemented for a given board)
834 config TPL_DRIVERS_MISC_SUPPORT
835 bool "Support misc drivers in TPL"
837 Enable miscellaneous drivers in TPL. These drivers perform various
838 tasks that don't fall nicely into other categories, Enable this
839 option to build the drivers in drivers/misc as part of an TPL
840 build, for those that support building in TPL (not all drivers do).
842 config TPL_ENV_SUPPORT
843 bool "Support an environment"
845 Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
847 config TPL_I2C_SUPPORT
850 Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
853 config TPL_LIBCOMMON_SUPPORT
854 bool "Support common libraries"
856 Enable support for common U-Boot libraries within TPL. See
857 SPL_LIBCOMMON_SUPPORT for details.
859 config TPL_LIBGENERIC_SUPPORT
860 bool "Support generic libraries"
862 Enable support for generic U-Boot libraries within TPL. See
863 SPL_LIBGENERIC_SUPPORT for details.
865 config TPL_MPC8XXX_INIT_DDR_SUPPORT
866 bool "Support MPC8XXX DDR init"
868 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
869 SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
871 config TPL_MMC_SUPPORT
875 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
877 config TPL_NAND_SUPPORT
878 bool "Support NAND flash"
880 Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
882 config TPL_SERIAL_SUPPORT
883 bool "Support serial"
885 Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
888 config TPL_SPI_FLASH_SUPPORT
889 bool "Support SPI flash drivers"
891 Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
894 config TPL_SPI_SUPPORT
895 bool "Support SPI drivers"
897 Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for