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-58 common/cmd_nand.c Error reading Image from NAND device
58 common/cmd_nand.c reading Image from NAND device OK
-60 common/env_common.c Environment has a bad CRC, using default
64 net/eth.c starting with Ethernet configuration.
-64 net/eth.c no Ethernet found.
65 net/eth.c Ethernet found.
-80 common/cmd_net.c usage wrong
80 common/cmd_net.c before calling NetLoop()
-81 common/cmd_net.c some error in NetLoop() occurred
81 common/cmd_net.c NetLoop() back without error
-82 common/cmd_net.c size == 0 (File with size 0 loaded)
82 common/cmd_net.c trying automatic boot
83 common/cmd_net.c running "source" command
-83 common/cmd_net.c some error in automatic boot or "source" command
84 common/cmd_net.c end without errors
FIT uImage format:
Arg Where When
100 common/cmd_bootm.c Kernel FIT Image has correct format
-100 common/cmd_bootm.c Kernel FIT Image has incorrect format
101 common/cmd_bootm.c No Kernel subimage unit name, using configuration
-101 common/cmd_bootm.c Can't get configuration for kernel subimage
102 common/cmd_bootm.c Kernel unit name specified
-103 common/cmd_bootm.c Can't get kernel subimage node offset
Marian Balakowicz
committed
103 common/cmd_bootm.c Found configuration node
104 common/cmd_bootm.c Got kernel subimage node offset
-104 common/cmd_bootm.c Kernel subimage hash verification failed
105 common/cmd_bootm.c Kernel subimage hash verification OK
-105 common/cmd_bootm.c Kernel subimage is for unsupported architecture
106 common/cmd_bootm.c Architecture check OK
-106 common/cmd_bootm.c Kernel subimage has wrong type
107 common/cmd_bootm.c Kernel subimage type OK
-107 common/cmd_bootm.c Can't get kernel subimage data/size
108 common/cmd_bootm.c Got kernel subimage data/size
-108 common/cmd_bootm.c Wrong image type (not legacy, FIT)
-109 common/cmd_bootm.c Can't get kernel subimage type
-110 common/cmd_bootm.c Can't get kernel subimage comp
-111 common/cmd_bootm.c Can't get kernel subimage os
-112 common/cmd_bootm.c Can't get kernel subimage load address
-113 common/cmd_bootm.c Image uncompress/copy overwrite error
120 common/image.c Start initial ramdisk verification
-120 common/image.c Ramdisk FIT image has incorrect format
121 common/image.c Ramdisk FIT image has correct format
122 common/image.c No ramdisk subimage unit name, using configuration
-122 common/image.c Can't get configuration for ramdisk subimage
123 common/image.c Ramdisk unit name specified
-124 common/image.c Can't get ramdisk subimage node offset
125 common/image.c Got ramdisk subimage node offset
-125 common/image.c Ramdisk subimage hash verification failed
126 common/image.c Ramdisk subimage hash verification OK
-126 common/image.c Ramdisk subimage for unsupported architecture
127 common/image.c Architecture check OK
-127 common/image.c Can't get ramdisk subimage data/size
128 common/image.c Got ramdisk subimage data/size
129 common/image.c Can't get ramdisk load address
-129 common/image.c Got ramdisk load address
-130 common/cmd_doc.c Incorrect FIT image format
131 common/cmd_doc.c FIT image format OK
-140 common/cmd_ide.c Incorrect FIT image format
141 common/cmd_ide.c FIT image format OK
-150 common/cmd_nand.c Incorrect FIT image format
151 common/cmd_nand.c FIT image format OK
- FIT image support:
CONFIG_FIT
Enable support for the FIT uImage format.
CONFIG_FIT_BEST_MATCH
When no configuration is explicitly selected, default to the
one whose fdt's compatibility field best matches that of
U-Boot itself. A match is considered "best" if it matches the
most specific compatibility entry of U-Boot's fdt's root node.
The order of entries in the configuration's fdt is ignored.
CONFIG_FIT_SIGNATURE
This option enables signature verification of FIT uImages,
using a hash signed and verified using RSA. See
doc/uImage.FIT/signature.txt for more details.
- Standalone program support:
CONFIG_STANDALONE_LOAD_ADDR
This option defines a board specific value for the
address where standalone program gets loaded, thus
overwriting the architecture dependent default
settings.
- Frame Buffer Address:
CONFIG_FB_ADDR
Define CONFIG_FB_ADDR if you want to use specific
address for frame buffer. This is typically the case
when using a graphics controller has separate video
memory. U-Boot will then place the frame buffer at
the given address instead of dynamically reserving it
in system RAM by calling lcd_setmem(), which grabs
the memory for the frame buffer depending on the
configured panel size.
Please see board_init_f function.
- Automatic software updates via TFTP server
CONFIG_UPDATE_TFTP
CONFIG_UPDATE_TFTP_CNT_MAX
CONFIG_UPDATE_TFTP_MSEC_MAX
These options enable and control the auto-update feature;
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_CMD_UBI
Adds commands for interacting with MTD partitions formatted
with the UBI flash translation layer
Requires also defining CONFIG_RBTREE
CONFIG_UBI_SILENCE_MSG
Make the verbose messages from UBI stop printing. This leaves
warnings and errors enabled.
- UBIFS support
CONFIG_CMD_UBIFS
Adds commands for interacting with UBI volumes formatted as
UBIFS. UBIFS is read-only in u-boot.
Requires UBI support as well as CONFIG_LZO
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_LDSCRIPT
LDSCRIPT for linking the SPL binary.
CONFIG_SPL_MAX_FOOTPRINT
Maximum size in memory allocated to the SPL, BSS included.
When defined, the linker checks that the actual memory
used by SPL from _start to __bss_end does not exceed it.
CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
must not be both defined at the same time.
Maximum size of the SPL image (text, data, rodata, and
linker lists sections), BSS excluded.
When defined, the linker checks that the actual size does
not exceed it.
CONFIG_SPL_TEXT_BASE
TEXT_BASE for linking the SPL binary.
CONFIG_SPL_RELOC_TEXT_BASE
Address to relocate to. If unspecified, this is equal to
CONFIG_SPL_TEXT_BASE (i.e. no relocation is done).
CONFIG_SPL_BSS_START_ADDR
Link address for the BSS within the SPL binary.
CONFIG_SPL_BSS_MAX_SIZE
Maximum size in memory allocated to the SPL BSS.
When defined, the linker checks that the actual memory used
by SPL from __bss_start to __bss_end does not exceed it.
CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
must not be both defined at the same time.
CONFIG_SPL_STACK
Adress of the start of the stack SPL will use
CONFIG_SPL_RELOC_STACK
Adress of the start of the stack SPL will use after
relocation. If unspecified, this is equal to
CONFIG_SPL_STACK.
CONFIG_SYS_SPL_MALLOC_START
Starting address of the malloc pool used in SPL.
CONFIG_SYS_SPL_MALLOC_SIZE
The size of the malloc pool used in SPL.
CONFIG_SPL_FRAMEWORK
Enable the SPL framework under common/. This framework
supports MMC, NAND and YMODEM loading of U-Boot and NAND
NAND loading of the Linux Kernel.
CONFIG_SPL_DISPLAY_PRINT
For ARM, enable an optional function to print more information
about the running system.
CONFIG_SPL_INIT_MINIMAL
Arch init code should be built for a very small image
CONFIG_SPL_LIBCOMMON_SUPPORT
Support for common/libcommon.o in SPL binary
CONFIG_SPL_LIBDISK_SUPPORT
Support for disk/libdisk.o in SPL binary
CONFIG_SPL_I2C_SUPPORT
Support for drivers/i2c/libi2c.o in SPL binary
CONFIG_SPL_GPIO_SUPPORT
Support for drivers/gpio/libgpio.o in SPL binary
CONFIG_SPL_MMC_SUPPORT
Support for drivers/mmc/libmmc.o in SPL binary
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS,
CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION
Address, size and partition on the MMC to load U-Boot from
when the MMC is being used in raw mode.
CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
Sector to load kernel uImage from when MMC is being
used in raw mode (for Falcon mode)
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR,
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS
Sector and number of sectors to load kernel argument
parameters from when MMC is being used in raw mode
(for falcon mode)
CONFIG_SPL_FAT_SUPPORT
Support for fs/fat/libfat.o in SPL binary
CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME
Filename to read to load U-Boot when reading from FAT
CONFIG_SPL_FAT_LOAD_KERNEL_NAME
Filename to read to load kernel uImage when reading
from FAT (for Falcon mode)
CONFIG_SPL_FAT_LOAD_ARGS_NAME
Filename to read to load kernel argument parameters
when reading from FAT (for Falcon mode)
CONFIG_SPL_MPC83XX_WAIT_FOR_NAND
Set this for NAND SPL on PPC mpc83xx targets, so that
start.S waits for the rest of the SPL to load before
continuing (the hardware starts execution after just
loading the first page rather than the full 4K).
CONFIG_SPL_NAND_BASE
Include nand_base.c in the SPL. Requires
CONFIG_SPL_NAND_DRIVERS.
CONFIG_SPL_NAND_DRIVERS
SPL uses normal NAND drivers, not minimal drivers.
CONFIG_SPL_NAND_ECC
Include standard software ECC in the SPL
Support for NAND boot using simple NAND drivers that
expose the cmd_ctrl() interface.
CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
Set for the SPL on PPC mpc8xxx targets, support for
drivers/ddr/fsl/libddr.o in SPL binary.
CONFIG_SPL_COMMON_INIT_DDR
Set for common ddr init with serial presence detect in
SPL binary.
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,
CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE,
CONFIG_SYS_NAND_ECCBYTES
Defines the size and behavior of the NAND that SPL uses
CONFIG_SPL_NAND_BOOT
Add support NAND boot
Location in NAND to read U-Boot from
CONFIG_SYS_NAND_U_BOOT_DST
Location in memory to load U-Boot to
CONFIG_SYS_NAND_U_BOOT_SIZE
Size of image to load
Entry point in loaded image to jump to
CONFIG_SYS_NAND_HW_ECC_OOBFIRST
Define this if you need to first read the OOB and then the
data. This is used for example on davinci plattforms.
CONFIG_SPL_OMAP3_ID_NAND
Support for an OMAP3-specific set of functions to return the
ID and MFR of the first attached NAND chip, if present.
CONFIG_SPL_SERIAL_SUPPORT
Support for drivers/serial/libserial.o in SPL binary
CONFIG_SPL_SPI_FLASH_SUPPORT
Support for drivers/mtd/spi/libspi_flash.o in SPL binary
CONFIG_SPL_SPI_SUPPORT
Support for drivers/spi/libspi.o in SPL binary
CONFIG_SPL_RAM_DEVICE
Support for running image already present in ram, in SPL binary
CONFIG_SPL_LIBGENERIC_SUPPORT
Support for lib/libgeneric.o in SPL binary
CONFIG_SPL_ENV_SUPPORT
Support for the environment operating in SPL binary
CONFIG_SPL_NET_SUPPORT
Support for the net/libnet.o in SPL binary.
It conflicts with SPL env from storage medium specified by
CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE
Image offset to which the SPL should be padded before appending
the SPL payload. By default, this is defined as
CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
payload without any padding, or >= CONFIG_SPL_MAX_SIZE.
CONFIG_SPL_TARGET
Final target image containing SPL and payload. Some SPLs
use an arch-specific makefile fragment instead, for
example if more than one image needs to be produced.
CONFIG_FIT_SPL_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
bootm command when booting a FIT image.
- TPL framework
CONFIG_TPL
Enable building of TPL globally.
CONFIG_TPL_PAD_TO
Image offset to which the TPL should be padded before appending
the TPL payload. By default, this is defined as
CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
payload without any padding, or >= CONFIG_SPL_MAX_SIZE.
CONFIG_MODEM_SUPPORT
- RTS/CTS Flow control enable:
CONFIG_HWFLOW
- Modem debug support:
CONFIG_MODEM_SUPPORT_DEBUG
Enables debugging stuff (char screen[1024], dbg())
for modem support. Useful only with BDI2000.
There are common interrupt_init() and timer_interrupt()
for all PPC archs. interrupt_init() calls interrupt_init_cpu()
for CPU specific initialization. interrupt_init_cpu()
should set decrementer_count to appropriate value. If
CPU resets decrementer automatically after interrupt
(ppc4xx) it should set decrementer_count to zero.
timer_interrupt() calls timer_interrupt_cpu() for CPU
specific handling. If board has watchdog / status_led
/ other_activity_monitor it works automatically from
general timer_interrupt().
In the target system modem support is enabled when a
specific key (key combination) is pressed during
power-on. Otherwise U-Boot will boot normally
(autoboot). The key_pressed() function is called from
board_init(). Currently key_pressed() is a dummy
function, returning 1 and thus enabling modem
initialization.
If there are no modem init strings in the
environment, U-Boot proceed to autoboot; the
previous output (banner, info printfs) will be
Board initialization settings:
------------------------------
During Initialization u-boot calls a number of board specific functions
to allow the preparation of board specific prerequisites, e.g. pin setup
before drivers are initialized. To enable these callbacks the
following configuration macros have to be defined. Currently this is
architecture specific, so please check arch/your_architecture/lib/board.c
typically in board_init_f() and board_init_r().
- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f()
- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r()
- CONFIG_BOARD_LATE_INIT: Call board_late_init()
- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init()
Configuration Settings:
-----------------------
- CONFIG_SYS_LONGHELP: Defined when you want long help messages included;
- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default
width of the commands listed in the 'help' command output.
- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to
- CONFIG_SYS_CBSIZE: Buffer size for input from the Console
- CONFIG_SYS_PBSIZE: Buffer size for Console output
- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands
- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to
the application (usually a Linux kernel) when it is
booted
- CONFIG_SYS_BAUDRATE_TABLE:
- CONFIG_SYS_CONSOLE_INFO_QUIET
- CONFIG_SYS_CONSOLE_IS_IN_ENV
If the board specific function
extern int overwrite_console (void);
returns 1, the stdin, stderr and stdout are switched to the
serial port, else the settings in the environment are used.
- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
- CONFIG_SYS_CONSOLE_ENV_OVERWRITE
Enable overwrite of previous console environment settings.
- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END:
Begin and End addresses of the area used by the
simple memory test.
- CONFIG_SYS_ALT_MEMTEST:
- CONFIG_SYS_MEMTEST_SCRATCH:
Scratch address used by the alternate memory test
You only need to set this if address zero isn't writeable
- CONFIG_SYS_MEM_TOP_HIDE (PPC only):
If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header,
Stefan Roese
committed
this specified memory area will get subtracted from the top
(end) of RAM and won't get "touched" at all by U-Boot. By
Stefan Roese
committed
fixing up gd->ram_size the Linux kernel should gets passed
the now "corrected" memory size and won't touch it either.
This should work for arch/ppc and arch/powerpc. Only Linux
board ports in arch/powerpc with bootwrapper support that
Stefan Roese
committed
recalculate the memory size from the SDRAM controller setup
will have to get fixed in Linux additionally.
Stefan Roese
committed
This option can be used as a workaround for the 440EPx/GRx
CHIP 11 errata where the last 256 bytes in SDRAM shouldn't
be touched.
WARNING: Please make sure that this value is a multiple of
the Linux page size (normally 4k). If this is not the case,
then the end address of the Linux memory will be located at a
non page size aligned address and this could cause major
problems.
- CONFIG_SYS_LOADS_BAUD_CHANGE:
Enable temporary baudrate change while serial download
- CONFIG_SYS_SDRAM_BASE:
Physical start address of SDRAM. _Must_ be 0 here.
- CONFIG_SYS_MBIO_BASE:
Physical start address of Motherboard I/O (if using a
Cogent motherboard)
- CONFIG_SYS_FLASH_BASE:
- CONFIG_SYS_MONITOR_BASE:
Physical start address of boot monitor code (set by
make config files to be same as the text base address
(CONFIG_SYS_TEXT_BASE) used when linking) - same as
CONFIG_SYS_FLASH_BASE when booting from flash.
- CONFIG_SYS_MONITOR_LEN:
Size of memory reserved for monitor code, used to
determine _at_compile_time_ (!) if the environment is
embedded within the U-Boot image, or in a separate
flash sector.
- CONFIG_SYS_MALLOC_LEN:
- CONFIG_SYS_BOOTM_LEN:
Normally compressed uImages are limited to an
uncompressed size of 8 MBytes. If this is not enough,
you can define CONFIG_SYS_BOOTM_LEN in your board config file
to adjust this setting to your needs.
- CONFIG_SYS_BOOTMAPSZ:
Maximum size of memory mapped by the startup code of
the Linux kernel; all data that must be processed by
the Linux kernel (bd_info, boot arguments, FDT blob if
used) must be put below this limit, unless "bootm_low"
environment variable is defined and non-zero. In such case
all data for the Linux kernel must be between "bootm_low"
and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment
variable "bootm_mapsize" will override the value of
CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined,
then the value in "bootm_size" will be used instead.
- CONFIG_SYS_BOOT_RAMDISK_HIGH:
Enable initrd_high functionality. If defined then the
initrd_high feature is enabled and the bootm ramdisk subcommand
is enabled.
- CONFIG_SYS_BOOT_GET_CMDLINE:
Enables allocating and saving kernel cmdline in space between
"bootm_low" and "bootm_low" + BOOTMAPSZ.
- CONFIG_SYS_BOOT_GET_KBD:
Enables allocating and saving a kernel copy of the bd_info in
space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
- CONFIG_SYS_MAX_FLASH_BANKS:
- CONFIG_SYS_MAX_FLASH_SECT:
- CONFIG_SYS_FLASH_ERASE_TOUT:
- CONFIG_SYS_FLASH_WRITE_TOUT:
- CONFIG_SYS_FLASH_LOCK_TOUT
Timeout for Flash set sector lock bit operation (in ms)
- CONFIG_SYS_FLASH_UNLOCK_TOUT
Timeout for Flash clear lock bits operation (in ms)
- CONFIG_SYS_FLASH_PROTECTION
If defined, hardware flash sectors protection is used
instead of U-Boot software protection.
- CONFIG_SYS_DIRECT_FLASH_TFTP:
Enable TFTP transfers directly to flash memory;
without this option such a download has to be
performed in two steps: (1) download to RAM, and (2)
copy from RAM to flash.
The two-step approach is usually more reliable, since
you can check if the download worked before you erase
the flash, but in some situations (when system RAM is
too limited to allow for a temporary copy of the
downloaded image) this option may be very useful.
- CONFIG_SYS_FLASH_CFI:
Define if the flash driver uses extra elements in the
common flash structure for storing flash geometry.
- CONFIG_FLASH_CFI_DRIVER
This option also enables the building of the cfi_flash driver
in the drivers directory
- CONFIG_FLASH_CFI_MTD
This option enables the building of the cfi_mtd driver
in the drivers directory. The driver exports CFI flash
to the MTD layer.
- CONFIG_SYS_FLASH_USE_BUFFER_WRITE
Guennadi Liakhovetski
committed
Use buffered writes to flash.
- CONFIG_FLASH_SPANSION_S29WS_N
s29ws-n MirrorBit flash has non-standard addresses for buffered
write commands.
- CONFIG_SYS_FLASH_QUIET_TEST
If this option is defined, the common CFI flash doesn't
print it's warning upon not recognized FLASH banks. This
is useful, if some of the configured banks are only
optionally available.
- CONFIG_FLASH_SHOW_PROGRESS
If defined (must be an integer), print out countdown
digits and dots. Recommended value: 45 (9..1) for 80
column displays, 15 (3..1) for 40 column displays.
- CONFIG_FLASH_VERIFY
If defined, the content of the flash (destination) is compared
against the source after the write operation. An error message
will be printed when the contents are not identical.
Please note that this option is useless in nearly all cases,
since such flash programming errors usually are detected earlier
while unprotecting/erasing/programming. Please only enable
this option if you really know what you are doing.
- CONFIG_SYS_RX_ETH_BUFFER:
Defines the number of Ethernet receive buffers. On some
Ethernet controllers it is recommended to set this value
to 8 or even higher (EEPRO100 or 405 EMAC), since all
buffers can be full shortly after enabling the interface
- CONFIG_ENV_MAX_ENTRIES
Maximum number of entries in the hash table that is used
internally to store the environment settings. The default
setting is supposed to be generous and should work in most
cases. This setting can be used to tune behaviour; see
lib/hashtable.c for details.
- CONFIG_ENV_FLAGS_LIST_DEFAULT
- CONFIG_ENV_FLAGS_LIST_STATIC
Enable validation of the values given to environment variables when
calling env set. Variables can be restricted to only decimal,
hexadecimal, or boolean. If CONFIG_CMD_NET is also defined,
the variables can also be restricted to IP address or MAC address.
The format of the list is:
type_attribute = [s|d|x|b|i|m]
access_atribute = [a|r|o|c]
attributes = type_attribute[access_atribute]
entry = variable_name[:attributes]
list = entry[,list]
The type attributes are:
s - String (default)
d - Decimal
x - Hexadecimal
b - Boolean ([1yYtT|0nNfF])
i - IP address
m - MAC address
The access attributes are:
a - Any (default)
r - Read-only
o - Write-once
c - Change-default
- CONFIG_ENV_FLAGS_LIST_DEFAULT
Define this to a list (string) to define the ".flags"
envirnoment variable in the default or embedded environment.
- CONFIG_ENV_FLAGS_LIST_STATIC
Define this to a list (string) to define validation that
should be done if an entry is not found in the ".flags"
environment variable. To override a setting in the static
list, simply add an entry for the same variable name to the
".flags" variable.
- CONFIG_ENV_ACCESS_IGNORE_FORCE
If defined, don't allow the -f switch to env set override variable
access flags.
- CONFIG_SYS_GENERIC_BOARD
This selects the architecture-generic board system instead of the
architecture-specific board files. It is intended to move boards
to this new framework over time. Defining this will disable the
arch/foo/lib/board.c file and use common/board_f.c and
common/board_r.c instead. To use this option your architecture
must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in
its config.mk file). If you find problems enabling this option on
your board please report the problem and send patches!
- CONFIG_SYS_SYM_OFFSETS
This is set by architectures that use offsets for link symbols
instead of absolute values. So bss_start is obtained using an
offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than
directly. You should not need to touch this setting.
- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only)
This is set by OMAP boards for the max time that reset should
be asserted. See doc/README.omap-reset-time for details on how
the value can be calulated on a given board.
The following definitions that deal with the placement and management
of environment data (variable area); in general, we support the
following configurations:
- CONFIG_BUILD_ENVCRC:
Builds up envcrc with the target environment so that external utils
may easily extract it and embed it in final U-Boot images.
- CONFIG_ENV_IS_IN_FLASH:
Define this if the environment is in flash memory.
a) The environment occupies one whole flash sector, which is
"embedded" in the text segment with the U-Boot code. This
happens usually with "bottom boot sector" or "top boot
sector" type flash chips, which have several smaller
sectors at the start or the end. For instance, such a
layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In
such a case you would place the environment in one of the
4 kB sectors - with U-Boot code before and after it. With
"top boot sector" type flash chips, you would put the
environment in one of the last sectors, leaving a gap
between U-Boot and the environment.
- CONFIG_ENV_OFFSET:
Offset of environment data (variable area) to the
beginning of flash memory; for instance, with bottom boot
type flash chips the second sector can be used: the offset
for this sector is given here.
CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE.
- CONFIG_ENV_ADDR:
This is just another way to specify the start address of
the flash sector containing the environment (instead of
CONFIG_ENV_OFFSET).
- CONFIG_ENV_SECT_SIZE:
Size of the sector containing the environment.
b) Sometimes flash chips have few, equal sized, BIG sectors.
In such a case you don't want to spend a whole sector for
the environment.
- CONFIG_ENV_SIZE:
If you use this in combination with CONFIG_ENV_IS_IN_FLASH
and CONFIG_ENV_SECT_SIZE, you can specify to use only a part
of this flash sector for the environment. This saves
memory for the RAM copy of the environment.
It may also save flash memory if you decide to use this
when your environment is "embedded" within U-Boot code,
since then the remainder of the flash sector could be used
for U-Boot code. It should be pointed out that this is
STRONGLY DISCOURAGED from a robustness point of view:
updating the environment in flash makes it always
necessary to erase the WHOLE sector. If something goes
wrong before the contents has been restored from a copy in
RAM, your target system will be dead.
- CONFIG_ENV_ADDR_REDUND
CONFIG_ENV_SIZE_REDUND
These settings describe a second storage area used to hold
a redundant copy of the environment data, so that there is
a valid backup copy in case there is a power failure during
BE CAREFUL! Any changes to the flash layout, and some changes to the
source code will make it necessary to adapt <board>/u-boot.lds*
accordingly!
- CONFIG_ENV_IS_IN_NVRAM:
Define this if you have some non-volatile memory device
(NVRAM, battery buffered SRAM) which you want to use for the
environment.
- CONFIG_ENV_ADDR:
- CONFIG_ENV_SIZE:
These two #defines are used to determine the memory area you
want to use for environment. It is assumed that this memory
can just be read and written to, without any special
provision.
BE CAREFUL! The first access to the environment happens quite early
in U-Boot initalization (when we try to get the setting of for the
console baudrate). You *MUST* have mapped your NVRAM area then, or
U-Boot will hang.
Please note that even with NVRAM we still use a copy of the
environment in RAM: we could work on NVRAM directly, but we want to
keep settings there always unmodified except somebody uses "saveenv"
to save the current settings.
- CONFIG_ENV_IS_IN_EEPROM:
Use this if you have an EEPROM or similar serial access
device and a driver for it.
- CONFIG_ENV_OFFSET:
- CONFIG_ENV_SIZE:
These two #defines specify the offset and size of the
environment area within the total memory of your EEPROM.
- CONFIG_SYS_I2C_EEPROM_ADDR:
If defined, specified the chip address of the EEPROM device.
The default address is zero.
- CONFIG_SYS_EEPROM_PAGE_WRITE_BITS:
If defined, the number of bits used to address bytes in a
single page in the EEPROM device. A 64 byte page, for example
would require six bits.
- CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS:
If defined, the number of milliseconds to delay between
page writes. The default is zero milliseconds.
- CONFIG_SYS_I2C_EEPROM_ADDR_LEN:
The length in bytes of the EEPROM memory array address. Note
that this is NOT the chip address length!
- CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW:
EEPROM chips that implement "address overflow" are ones
like Catalyst 24WC04/08/16 which has 9/10/11 bits of
address and the extra bits end up in the "chip address" bit
slots. This makes a 24WC08 (1Kbyte) chip look like four 256
byte chips.
Note that we consider the length of the address field to
still be one byte because the extra address bits are hidden
in the chip address.
- CONFIG_SYS_EEPROM_SIZE:
- CONFIG_ENV_EEPROM_IS_ON_I2C
define this, if you have I2C and SPI activated, and your
EEPROM, which holds the environment, is on the I2C bus.
- CONFIG_I2C_ENV_EEPROM_BUS
if you have an Environment on an EEPROM reached over
I2C muxes, you can define here, how to reach this
EEPROM. For example:
#define CONFIG_I2C_ENV_EEPROM_BUS 1
EEPROM which holds the environment, is reached over
a pca9547 i2c mux with address 0x70, channel 3.
Jean-Christophe PLAGNIOL-VILLARD
committed
- CONFIG_ENV_IS_IN_DATAFLASH:
Define this if you have a DataFlash memory device which you
want to use for the environment.
- CONFIG_ENV_OFFSET:
- CONFIG_ENV_ADDR:
- CONFIG_ENV_SIZE:
These three #defines specify the offset and size of the
environment area within the total memory of your DataFlash placed
at the specified address.
- CONFIG_ENV_IS_IN_REMOTE:
Define this if you have a remote memory space which you
want to use for the local device's environment.
- CONFIG_ENV_ADDR:
- CONFIG_ENV_SIZE:
These two #defines specify the address and size of the
environment area within the remote memory space. The
local device can get the environment from remote memory
space by SRIO or PCIE links.
BE CAREFUL! For some special cases, the local device can not use
"saveenv" command. For example, the local device will get the
environment stored in a remote NOR flash by SRIO or PCIE link,
but it can not erase, write this NOR flash by SRIO or PCIE interface.
- CONFIG_ENV_IS_IN_NAND:
Define this if you have a NAND device which you want to use
for the environment.
- CONFIG_ENV_OFFSET:
- CONFIG_ENV_SIZE:
These two #defines specify the offset and size of the environment
area within the first NAND device. CONFIG_ENV_OFFSET must be
aligned to an erase block boundary.
This setting describes a second storage area of CONFIG_ENV_SIZE
size used to hold a redundant copy of the environment data, so
that there is a valid backup copy in case there is a power failure
during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be
aligned to an erase block boundary.
- CONFIG_ENV_RANGE (optional):
Specifies the length of the region in which the environment
can be written. This should be a multiple of the NAND device's
block size. Specifying a range with more erase blocks than
are needed to hold CONFIG_ENV_SIZE allows bad blocks within
the range to be avoided.
- CONFIG_ENV_OFFSET_OOB (optional):
Enables support for dynamically retrieving the offset of the
environment from block zero's out-of-band data. The
"nand env.oob" command can be used to record this offset.
Currently, CONFIG_ENV_OFFSET_REDUND is not supported when
using CONFIG_ENV_OFFSET_OOB.
Guennadi Liakhovetski
committed
- CONFIG_NAND_ENV_DST
Defines address in RAM to which the nand_spl code should copy the
environment. If redundant environment is used, it will be copied to
CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE.
- CONFIG_ENV_IS_IN_UBI:
Define this if you have an UBI volume that you want to use for the
environment. This has the benefit of wear-leveling the environment
accesses, which is important on NAND.
- CONFIG_ENV_UBI_PART:
Define this to a string that is the mtd partition containing the UBI.
- CONFIG_ENV_UBI_VOLUME:
Define this to the name of the volume that you want to store the
environment in.
- CONFIG_ENV_UBI_VOLUME_REDUND:
Define this to the name of another volume to store a second copy of
the environment in. This will enable redundant environments in UBI.
It is assumed that both volumes are in the same MTD partition.
- CONFIG_UBI_SILENCE_MSG
- CONFIG_UBIFS_SILENCE_MSG
You will probably want to define these to avoid a really noisy system
when storing the env in UBI.
- CONFIG_ENV_IS_IN_MMC:
Define this if you have an MMC device which you want to use for the
environment.
- CONFIG_SYS_MMC_ENV_DEV:
Specifies which MMC device the environment is stored in.
- CONFIG_SYS_MMC_ENV_PART (optional):
Specifies which MMC partition the environment is stored in. If not
set, defaults to partition 0, the user area. Common values might be
1 (first MMC boot partition), 2 (second MMC boot partition).
- CONFIG_ENV_OFFSET:
- CONFIG_ENV_SIZE:
These two #defines specify the offset and size of the environment