/mpc5xx Files specific to Freescale MPC5xx CPUs
/mpc5xxx Files specific to Freescale MPC5xxx CPUs
/mpc8xx Files specific to Freescale MPC8xx CPUs
- /mpc8220 Files specific to Freescale MPC8220 CPUs
/mpc824x Files specific to Freescale MPC824x CPUs
/mpc8260 Files specific to Freescale MPC8260 CPUs
/mpc85xx Files specific to Freescale MPC85xx CPUs
exists, unlike the similar options in the Linux kernel. Do not
set these options unless they apply!
+- CPU timer options:
+ CONFIG_SYS_HZ
+
+ The frequency of the timer returned by get_timer().
+ get_timer() must operate in milliseconds and this CONFIG
+ option must be set to 1000.
+
- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ
CONFIG_CMD_FDOS * Dos diskette Support
CONFIG_CMD_FLASH flinfo, erase, protect
CONFIG_CMD_FPGA FPGA device initialization support
+ CONFIG_CMD_FUSE Device fuse support
CONFIG_CMD_GETTIME * Get time since boot
CONFIG_CMD_GO * the 'go' command (exec code)
CONFIG_CMD_GREPENV * search environment
CONFIG_CMD_SF * Read/write/erase SPI NOR flash
CONFIG_CMD_SHA1SUM print sha1 memory digest
(requires CONFIG_CMD_MEMORY)
+ CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x
CONFIG_CMD_SOURCE "source" command Support
CONFIG_CMD_SPI * SPI serial bus support
CONFIG_CMD_TFTPSRV * TFTP transfer in server mode
XXX - this list needs to get updated!
+- Regular expression support:
+ CONFIG_REGEX
+ If this variable is defined, U-Boot is linked against
+ the SLRE (Super Light Regular Expression) library,
+ which adds regex support to some commands, as for
+ example "env grep" and "setexpr".
+
- Device tree:
CONFIG_OF_CONTROL
If this variable is defined, U-Boot will use a device tree
CONFIG_SH_MMCIF_CLK
Define the clock frequency for MMCIF
+- USB Device Firmware Update (DFU) class support:
+ CONFIG_DFU_FUNCTION
+ This enables the USB portion of the DFU USB class
+
+ CONFIG_CMD_DFU
+ This enables the command "dfu" which is used to have
+ U-Boot create a DFU class device via USB. This command
+ requires that the "dfu_alt_info" environment variable be
+ set and define the alt settings to expose to the host.
+
+ CONFIG_DFU_MMC
+ This enables support for exposing (e)MMC devices via DFU.
+
+ CONFIG_DFU_NAND
+ This enables support for exposing NAND devices via DFU.
+
+ CONFIG_SYS_DFU_MAX_FILE_SIZE
+ When updating files rather than the raw storage device,
+ we use a static buffer to copy the file into and then write
+ the buffer once we've been given the whole file. Define
+ this to the maximum filesize (in bytes) for the buffer.
+ Default is 4 MiB if undefined.
+
- Journaling Flash filesystem support:
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
CONFIG_JFFS2_NAND_DEV
I2C_READ
- Code that returns TRUE if the I2C data line is high,
- FALSE if it is low.
+ Code that returns true if the I2C data line is high,
+ false if it is low.
eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
I2C_SDA(bit)
- If <bit> is TRUE, sets the I2C data line high. If it
- is FALSE, it clears it (low).
+ If <bit> is true, sets the I2C data line high. If it
+ is false, it clears it (low).
eg: #define I2C_SDA(bit) \
if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \
I2C_SCL(bit)
- If <bit> is TRUE, sets the I2C clock line high. If it
- is FALSE, it clears it (low).
+ If <bit> is true, sets the I2C clock line high. If it
+ is false, it clears it (low).
eg: #define I2C_SCL(bit) \
if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \
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.
+
CONFIG_SPL_MAX_SIZE
- Maximum binary size (text, data and rodata) of the SPL binary.
+ 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.
Link address for the BSS within the SPL binary.
CONFIG_SPL_BSS_MAX_SIZE
- Maximum binary size of the BSS section of the SPL binary.
+ 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
Support for lib/libgeneric.o in SPL binary
CONFIG_SPL_PAD_TO
- Linker address to which the SPL should be padded before
- appending the SPL payload.
+ 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.
+
Modem Support:
--------------
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
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
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_SYS_SPI_INIT_OFFSET
Defines offset to the initial SPI buffer area in DPRAM. The
using the "bootz" command. The syntax of "bootz" command is the same
as the syntax of "bootm" command.
-Note, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply
+Note, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply
kernel with raw initrd images. The syntax is slightly different, the
address of the initrd must be augmented by it's size, in the following
format: "<initrd addres>:<initrd size>".