Lines Matching +full:- +full:- +full:help
16 help
23 help
25 supports MMC, NAND and YMODEM and other methods loading of U-Boot
29 bool "Pass hand-off information from SPL to U-Boot proper"
31 help
32 It is useful to be able to pass information from SPL to U-Boot
33 proper to preserve state that is known in SPL and is needed in U-Boot.
34 Enable this to locate the handoff information in U-Boot proper, early
35 in boot. It is available in gd->handoff. The state state is set up
43 help
44 This option can minilize the SPL size to compatible with AST2600-A0
48 bool "Pass hand-off information from SPL to U-Boot proper"
51 help
53 used to pass information like the size of SDRAM from SPL to U-Boot
59 default "arch/$(ARCH)/cpu/u-boot-spl.lds"
60 help
61 The SPL stage will usually require a different linker-script
63 U-Boot stage. Set this to the path of the linker-script to
67 bool "Call board-specific initialization in SPL"
68 help
69 If this option is enabled, U-Boot will call the function
75 help
77 ROM for loading the next boot-stage after performing basic setup
81 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
87 help
90 use proper U-Boot for normal boot flow and hence needs those
97 help
105 help
114 help
123 help
127 usage as the *_simple malloc functions do not re-use free-ed mem.
132 help
136 usage as the *_simple malloc functions do not re-use free-ed mem.
140 help
145 location for the SPL stack. U-Boot SPL switches to this after
152 help
160 help
168 help
176 bool "Enable output of the SPL banner 'U-Boot SPL ...'"
178 help
184 bool "Enable output of the TPL banner 'U-Boot TPL ...'"
186 help
192 bool "Display a board-specific message in SPL"
193 help
194 If this option is enabled, U-Boot will call the function
196 banner ("U-Boot SPL ..."). This function should be provided by
202 help
209 help
219 help
220 Use sector number for specifying U-Boot location on MMC/SD in
224 hex "Address on the MMC to load U-Boot from"
235 help
236 Address on the MMC to load U-Boot from, when the MMC is being used
241 help
242 Use a partition for loading U-Boot when using MMC/SD in raw mode.
245 hex "Partition to use to load U-Boot from"
248 help
249 Partition on the MMC to load U-Boot from when the MMC is being
255 help
256 Use partition type for specifying U-Boot partition on MMC/SD in
257 raw mode. U-Boot will be loaded from the first partition of this
261 hex "Partition Type on the MMC to load U-Boot from"
263 help
264 Partition Type on the MMC to load U-Boot from, when the MMC is being
270 help
272 This is a 32-bit checksum value that can be used to verify images.
280 help
282 checksum is a 128-bit hash value used to check that the image
284 secure as it is possible (with a brute-force attack) to adjust the
293 help
295 checksum is a 160-bit (20-byte) hash value used to check that the
298 due to the expanding computing power available to brute-force
305 help
307 checksum is a 256-bit (32-byte) hash value used to check that the
315 help
317 checksum is a 384-bit (48-byte) hash value used to check that the
326 help
328 checksum is a 512-bit (64-byte) hash value used to check that the
336 help
341 first image to be treated as having a U-Boot style calling
349 help
358 help
368 help
371 this option to build system-specific drivers for hash acceleration
378 help
381 this option to build system-specific drivers for hash acceleration
386 help
387 Enable DMA (direct-memory-access) drivers in SPL. These drivers
388 can be used to handle memory-to-peripheral data transfer without
394 help
402 help
403 Enable environment support in SPL. The U-Boot environment provides
405 control many aspects of U-Boot's operation. Normally this is not
409 starting U-Boot first. Enabling this option will make env_get()
416 help
429 help
431 drivers in SPL. This permits SPL to load U-Boot over an Ethernet
432 link rather than from an on-board peripheral. Environment support
438 help
440 U-Boot (or Linux in Falcon mode) to be loaded from an EXT
447 help
449 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
455 help
462 help
463 Enable support for FPGAs in SPL. Field-programmable Gate Arrays
464 provide software-configurable hardware which is typically used to
473 help
474 Enable support for GPIOs (General-purpose Input/Output) in SPL.
475 GPIOs allow U-Boot to read the state of an input line (high or
478 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
484 help
485 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
497 help
498 Enable support for common U-Boot libraries within SPL. These
499 libraries include common code to deal with U-Boot images,
507 help
509 of a misnomer as it includes non-spinning media such as flash (as
516 U-Boot to also be used in SPL. It brings in the code in disk/.
520 help
521 Enable support for generic U-Boot libraries within SPL. These
529 help
539 help
551 help
557 help
558 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
559 random-access memory) on the MPC8XXX family within SPL. This
560 allows DRAM to be set up before loading U-Boot into that DRAM,
565 help
568 SPI flash. This allows SPL to load U-Boot from supported MTD
574 help
577 the drivers in drivers/usb/musb-new as part of an SPL build. The
582 help
584 can be used to allow SPL to load U-Boot from supported devices.
590 help
592 This permits SPL to load U-Boot over a network link rather than
593 from an on-board peripheral. Environment support is required since
600 help
605 SPL or U-Boot itself makes the request
610 help
611 This is specific to the ARM926EJ-S CPU. It disables the standard
612 start.S start-up code, presumably so that a replacement can be
618 help
619 Enable support for loading U-Boot from memory-mapped NOR (Negative
621 a memory-mapped device makes it very easy to access. Loading from
627 help
628 Enable support for execute in place of U-Boot or kernel image. There
635 help
638 load U-Boot from supported devices. This enables the drivers in
645 help
653 help
661 default "tpl/u-boot-with-tpl.bin" if TPL
662 default "u-boot.bin"
663 help
665 u-boot.bin, i.e. RAW image without any header. In case of
666 TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
667 use u-boot.img.
671 help
679 help
687 help
688 Enable support for POST (Power-on Self Test) in SPL. POST is a
697 help
699 That can be useful in SPL to handle IP reset in driver, as in U-Boot,
705 help
707 for PMICs (Power-management Integrated Circuits) and some of the
717 help
727 help
735 help
742 help
748 help
749 Enable RTC (Real-time Clock) support in SPL. This includes support
751 non-volatile (battery-backed) memory which is accessible if
757 help
760 loading U-Boot. SATA is used in higher-end embedded systems and
769 help
778 help
779 Enable support for using SPI flash in SPL, and loading U-Boot from
782 but fast bidirectional 4-wire bus (clock, chip select and two data
792 help
801 help
808 help
809 Enable support for loading next stage, U-Boot or otherwise, from
810 SPI NOR in U-Boot SPL.
816 help
818 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
826 help
827 Enable support for temperature-sensing devices. Some SoCs have on-chip
829 automatic power-off when the temperature gets too high or low. Other
835 help
837 SPL can load U-Boot from a connected USB peripheral, such as a USB
846 help
848 devices such as hard drives and flash drivers for loading U-Boot.
849 The actual drivers are enabled separately using the normal U-Boot
855 help
863 help
865 drivers in SPL. This permits SPL to load U-Boot over a
866 USB-connected Ethernet link (such as a USB Ethernet dongle) rather
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879 the SPL built with dfu. The user can load binaries (u-boot/kernel) to
880 selected device partition from host-pc using dfu-utils.
881 This feature is useful to flash the binaries to factory or bare-metal
891 help
893 (u-boot/kernel) to the selected device partition using
894 DFU and execute the u-boot/kernel from RAM.
900 help
908 help
917 help
920 means of transmitting U-Boot over a serial line for using in SPL,
926 help
929 More detail at: https://github.com/ARM-software/arm-trusted-firmware
934 help
937 not U-Boot aware and have an insufficiently robust parameter
940 If this option is enabled, the spl_atf os-type handler will
948 help
953 bool "Support OP-TEE Trusted OS"
955 help
956 OP-TEE is an open source Trusted OS which is loaded by SPL.
957 More detail at: https://github.com/OP-TEE/optee_os
963 help
969 bool "Pass hand-off information from TPL to SPL and U-Boot proper"
972 help
974 used to pass information like the size of SDRAM from TPL to U-Boot
979 bool "Call board-specific initialization in TPL"
980 help
981 If this option is enabled, U-Boot will call the function
988 default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
989 default "arch/$(ARCH)/cpu/u-boot-spl.lds"
990 help
991 The TPL stage will usually require a different linker-script
993 U-Boot stage. Set this to the path of the linker-script to
997 fall back to the linker-script used for the SPL stage.
1000 bool "TPL needs a separate text-base"
1003 help
1004 Enable, if the TPL stage should not inherit its text-base
1009 bool "TPL needs a separate initial stack-pointer"
1012 help
1014 stack-pointer from the settings for the SPL stage.
1019 help
1026 help
1030 hex "Address of the initial stack-pointer for the TPL stage"
1032 help
1033 The address of the initial stack-pointer for the TPL stage.
1034 Usually this will be the (aligned) top-of-stack.
1038 help
1040 ROM for loading the next boot-stage after performing basic setup
1044 BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1049 help
1057 help
1062 help
1063 Enable support for GPIOs (General-purpose Input/Output) in TPL.
1064 GPIOs allow U-Boot to read the state of an input line (high or
1067 input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1073 help
1079 help
1080 Enable support for common U-Boot libraries within TPL. See
1085 help
1086 Enable support for generic U-Boot libraries within TPL. See
1091 help
1092 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1098 help
1103 help
1108 help
1116 help
1124 help
1131 help
1138 help
1139 Enable RTC (Real-time Clock) support in TPL. This includes support
1141 non-volatile (battery-backed) memory which is accessible if
1149 help
1155 help
1162 help
1163 Enable support for loading next stage, U-Boot or otherwise, from
1164 SPI NOR in U-Boot TPL.
1168 help
1175 help
1178 means of transmitting U-Boot over a serial line for using in TPL,