+# SPDX-License-Identifier: GPL-2.0+
#
# (C) Copyright 2000 - 2013
-#
-# SPDX-License-Identifier: GPL-2.0+
-#
Summary:
========
- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS.
-- Marvell Family Member
- CONFIG_SYS_MVFS - define it if you want to enable
- multiple fs option at one time
- for marvell soc family
-
- 85xx CPU Options:
CONFIG_SYS_PPC64
as a convenience, when switching between booting from
RAM and NFS.
-- Bootcount:
- CONFIG_BOOTCOUNT_ENV
- If no softreset save registers are found on the hardware
- "bootcount" is stored in the environment. To prevent a
- saveenv on all reboots, the environment variable
- "upgrade_available" is used. If "upgrade_available" is
- 0, "bootcount" is always 0, if "upgrade_available" is
- 1 "bootcount" is incremented in the environment.
- So the Userspace Applikation must set the "upgrade_available"
- and "bootcount" variable to 0, if a boot was successfully.
-
- Pre-Boot Commands:
CONFIG_PREBOOT
CONFIG_AT91_HW_WDT_TIMEOUT
specify the timeout in seconds. default 2 seconds.
-- U-Boot Version:
- CONFIG_VERSION_VARIABLE
- If this variable is defined, an environment variable
- named "ver" is created by U-Boot showing the U-Boot
- version as printed by the "version" command.
- Any change to this variable will be reverted at the
- next reset.
-
- Real-Time Clock:
When CONFIG_CMD_DATE is selected, the type of the RTC
CONFIG_EFI_PARTITION GPT partition table, common when EFI is the
bootloader. Note 2TB partition limit; see
disk/part_efi.c
- CONFIG_MTD_PARTITIONS Memory Technology Device partition table.
-
- If IDE or SCSI support is enabled (CONFIG_IDE or
CONFIG_SCSI) you must configure support for at
least one non-MTD partition type as well.
Define this to use i/o functions instead of macros
(some hardware wont work with macros)
- CONFIG_DRIVER_TI_EMAC
- Support for davinci emac
-
CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT
Define this if you have more then 3 PHYs.
CONFIG_SUPPORT_EMMC_BOOT
Enable some additional features of the eMMC boot partitions.
- CONFIG_SUPPORT_EMMC_RPMB
- Enable the commands for reading, writing and programming the
- key for the Replay Protection Memory Block partition in eMMC.
-
- USB Device Firmware Update (DFU) class support:
- CONFIG_USB_FUNCTION_DFU
+ CONFIG_DFU_OVER_USB
This enables the USB portion of the DFU USB class
CONFIG_DFU_MMC
be at least 4MB.
- MII/PHY support:
- CONFIG_PHY_ADDR
-
- The address of PHY on MII bus.
-
CONFIG_PHY_CLOCK_FREQ (ppc4xx)
The clock frequency of the MII bus
You can fine tune the DHCP functionality by defining
CONFIG_BOOTP_* symbols:
- CONFIG_BOOTP_SUBNETMASK
- CONFIG_BOOTP_GATEWAY
- CONFIG_BOOTP_HOSTNAME
CONFIG_BOOTP_NISDOMAIN
- CONFIG_BOOTP_BOOTPATH
CONFIG_BOOTP_BOOTFILESIZE
- CONFIG_BOOTP_DNS
- CONFIG_BOOTP_DNS2
CONFIG_BOOTP_SEND_HOSTNAME
CONFIG_BOOTP_NTPSERVER
CONFIG_BOOTP_TIMEOFFSET
to Link-local IP address configuration if the DHCP server
is not available.
- CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
- serverip from a DHCP server, it is possible that more
- than one DNS serverip is offered to the client.
- If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
- serverip will be stored in the additional environment
- variable "dnsip2". The first DNS serverip is always
- stored in the variable "dnsip", when CONFIG_BOOTP_DNS
- is defined.
-
CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable
to do a dynamic update of a DNS server. To do this, they
need the hostname of the DHCP requester.
#define CONFIG_NFS_TIMEOUT 10000UL
- Command Interpreter:
- CONFIG_AUTO_COMPLETE
-
- Enable auto completion of commands using TAB.
-
CONFIG_SYS_PROMPT_HUSH_PS2
This defines the secondary prompt string, which is
symbols.
- Command Line Editing and History:
- CONFIG_CMDLINE_EDITING
-
- Enable editing and History functions for interactive
- command line input operations
-
-- Command Line PS1/PS2 support:
CONFIG_CMDLINE_PS_SUPPORT
Enable support for changing the command prompt string
the environment like the "source" command or the
boot command first.
- CONFIG_ENV_VARS_UBOOT_CONFIG
-
- Define this in order to add variables describing the
- U-Boot build configuration to the default environment.
- These will be named arch, cpu, board, vendor, and soc.
-
- Enabling this option will cause the following to be defined:
-
- - CONFIG_SYS_ARCH
- - CONFIG_SYS_CPU
- - CONFIG_SYS_BOARD
- - CONFIG_SYS_VENDOR
- - CONFIG_SYS_SOC
-
- CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
-
- Define this in order to add variables describing certain
- run-time determined information about the hardware to the
- environment. These will be named board_name, board_rev.
-
CONFIG_DELAY_ENVIRONMENT
Normally the environment is loaded when the board is
A better solution is to properly configure the firewall,
but sometimes that is not allowed.
-- bootcount support:
- CONFIG_AT91SAM9XE
- enable special bootcounter support on at91sam9xe based boards.
- CONFIG_SOC_DA8XX
- enable special bootcounter support on da850 based boards.
- CONFIG_BOOTCOUNT_RAM
- enable support for the bootcounter in RAM
- CONFIG_BOOTCOUNT_I2C
- enable support for the bootcounter on an i2c (like RTC) device.
- CONFIG_SYS_I2C_RTC_ADDR = i2c chip address
- CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for
- the bootcounter.
- CONFIG_BOOTCOUNT_ALEN = address len
- CONFIG_BOOTCOUNT_EXT
- enable support for the bootcounter in EXT filesystem
- CONFIG_SYS_BOOTCOUNT_ADDR = RAM address used for read
- and write.
- CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE = interface
- CONFIG_SYS_BOOTCOUNT_EXT_DEVPART = device and part
- CONFIG_SYS_BOOTCOUNT_EXT_NAME = filename
-
- Show boot progress:
CONFIG_SHOW_BOOT_PROGRESS
-150 common/cmd_nand.c Incorrect FIT image format
151 common/cmd_nand.c FIT image format OK
-- legacy image format:
- CONFIG_IMAGE_FORMAT_LEGACY
- enables the legacy image format support in U-Boot.
-
- Default:
- enabled if CONFIG_FIT_SIGNATURE is not defined.
-
- CONFIG_DISABLE_IMAGE_LEGACY
- disable the legacy image format
-
- This define is introduced, as the legacy image format is
- enabled per default for backward compatibility.
-
- Standalone program support:
CONFIG_STANDALONE_LOAD_ADDR
for a more detailed description refer to doc/README.update.
- MTD Support (mtdparts command, UBI support)
- CONFIG_MTD_DEVICE
-
- Adds the MTD device infrastructure from the Linux kernel.
- Needed for mtdparts command support.
-
- CONFIG_MTD_PARTITIONS
-
- Adds the MTD partitioning infrastructure from the Linux
- kernel. Needed for UBI support.
-
-- UBI support
- CONFIG_UBI_SILENCE_MSG
-
- Make the verbose messages from UBI stop printing. This leaves
- warnings and errors enabled.
-
-
CONFIG_MTD_UBI_WL_THRESHOLD
This parameter defines the maximum difference between the highest
erase counter value and the lowest erase counter value of eraseblocks
Enable UBI fastmap debug
default: 0
-- UBIFS support
- CONFIG_UBIFS_SILENCE_MSG
-
- Make the verbose messages from UBIFS stop printing. This leaves
- warnings and errors enabled.
-
- SPL framework
CONFIG_SPL
Enable building of SPL globally.
CONFIG_SPL_NAND_DRIVERS
SPL uses normal NAND drivers, not minimal drivers.
+ CONFIG_SPL_NAND_IDENT
+ SPL uses the chip ID list to identify the NAND flash.
+ Requires CONFIG_SPL_NAND_BASE.
+
CONFIG_SPL_NAND_ECC
Include standard software ECC in the SPL
use an arch-specific makefile fragment instead, for
example if more than one image needs to be produced.
- CONFIG_FIT_SPL_PRINT
+ CONFIG_SPL_FIT_PRINT
Printing information about a FIT image adds quite a bit of
code to SPL. So this is normally disabled in SPL. Use this
option to re-enable it. This will affect the output of the
Begin and End addresses of the area used by the
simple memory test.
-- CONFIG_SYS_ALT_MEMTEST:
- Enable an alternate, more extensive memory test.
-
- CONFIG_SYS_MEMTEST_SCRATCH:
Scratch address used by the alternate memory test
You only need to set this if address zero isn't writeable
If defined, don't allow the -f switch to env set override variable
access flags.
-- CONFIG_USE_STDINT
- If stdint.h is available with your toolchain you can define this
- option to enable it. You can provide option 'USE_STDINT=1' when
- building U-Boot to enable this.
-
The following definitions that deal with the placement and management
of environment data (variable area); in general, we support the
following configurations:
If defined, the x86 reset vector code is included. This is not
needed when U-Boot is running from Coreboot.
-- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC:
- Enables the RTC32K OSC on AM33xx based plattforms
-
- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
Option to disable subpage write in NAND driver
driver that uses this:
regular expression. This allows multiple variables to be connected to
the same callback without explicitly listing them all out.
+The signature of the callback functions is:
+
+ int callback(const char *name, const char *value, enum env_op op, int flags)
+
+* name - changed environment variable
+* value - new value of the environment variable
+* op - operation (create, overwrite, or delete)
+* flags - attributes of the environment variable change, see flags H_* in
+ include/search.h
+
+The return value is 0 if the variable change is accepted and 1 otherwise.
Command Line Parsing:
=====================
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