the defaults discussed just above.
- Cache Configuration:
- CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot
- CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot
CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot
- Cache Configuration for ARM:
as a convenience, when switching between booting from
RAM and NFS.
-- Pre-Boot Commands:
- CONFIG_PREBOOT
-
- When this option is #defined, the existence of the
- environment variable "preboot" will be checked
- immediately before starting the CONFIG_BOOTDELAY
- countdown and/or running the auto-boot command resp.
- entering interactive mode.
-
- This feature is especially useful when "preboot" is
- automatically generated or modified. For an example
- see the LWMON board specific code: here "preboot" is
- modified when the user holds down a certain
- combination of keys on the (special) keyboard when
- booting the systems
-
- Serial Download Echo Mode:
CONFIG_LOADS_ECHO
If defined to 1, all characters received during a
SoC, then define this variable and provide board
specific code for the "hw_watchdog_reset" function.
- CONFIG_AT91_HW_WDT_TIMEOUT
- specify the timeout in seconds. default 2 seconds.
-
- Real-Time Clock:
When CONFIG_CMD_DATE is selected, the type of the RTC
CONFIG_SH_MMCIF_CLK
Define the clock frequency for MMCIF
- CONFIG_SUPPORT_EMMC_BOOT
- Enable some additional features of the eMMC boot partitions.
-
- USB Device Firmware Update (DFU) class support:
CONFIG_DFU_OVER_USB
This enables the USB portion of the DFU USB class
- 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.
forwarded through a router.
(Environment variable "netmask")
-- Multicast TFTP Mode:
- CONFIG_MCAST_TFTP
-
- Defines whether you want to support multicast TFTP as per
- rfc-2090; for example to work with atftp. Lets lots of targets
- tftp down the same boot image concurrently. Note: the Ethernet
- driver in use must provide a function: mcast() to join/leave a
- multicast group.
-
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
- CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4
- CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4
- - drivers/i2c/zynq_i2c.c
- - activate this driver with CONFIG_SYS_I2C_ZYNQ
- - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting
- - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr
-
- drivers/i2c/s3c24x0_i2c.c:
- activate this driver with CONFIG_SYS_I2C_S3C24X0
- This driver adds i2c buses (11 for Exynos5250, Exynos5420
SPI configuration items (port pins to use, etc). For
an example, see include/configs/sacsng.h.
- CONFIG_HARD_SPI
-
- Enables a hardware SPI driver for general-purpose reads
- and writes. As with CONFIG_SOFT_SPI, the board configuration
- must define a list of chip-select function pointers.
- Currently supported on some MPC8xxx processors. For an
- example, see include/configs/mpc8349emds.h.
-
CONFIG_SYS_SPI_MXC_WAIT
Timeout for waiting until spi transfer completed.
default: (CONFIG_SYS_HZ/100) /* 10 ms */
200 ms.
- Configuration Management:
- CONFIG_BUILD_TARGET
-
- Some SoCs need special image types (e.g. U-Boot binary
- with a special header) as build targets. By defining
- CONFIG_BUILD_TARGET in the SoC / board header, this
- special image will be automatically built upon calling
- make / buildman.
CONFIG_IDENT_STRING
this is instead controlled by the value of
/config/load-environment.
-- Serial Flash support
- Usage requires an initial 'sf probe' to define the serial
- flash parameters, followed by read/write/erase/update
- commands.
-
- The following defaults may be provided by the platform
- to handle the common case when only a single serial
- flash is present on the system.
-
- CONFIG_SF_DEFAULT_BUS Bus identifier
- CONFIG_SF_DEFAULT_CS Chip-select
- CONFIG_SF_DEFAULT_MODE (see include/spi.h)
- CONFIG_SF_DEFAULT_SPEED in Hz
-
-
- TFTP Fixed UDP Port:
CONFIG_TFTP_PORT
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).
a 16 bit bus.
Not all NAND drivers use this symbol.
Example of drivers that use it:
- - drivers/mtd/nand/ndfc.c
- - drivers/mtd/nand/mxc_nand.c
+ - drivers/mtd/nand/raw/ndfc.c
+ - drivers/mtd/nand/raw/mxc_nand.c
- CONFIG_SYS_NDFC_EBC0_CFG
Sets the EBC0_CFG register for the NDFC. If not defined
- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
Option to disable subpage write in NAND driver
driver that uses this:
- drivers/mtd/nand/davinci_nand.c
+ drivers/mtd/nand/raw/davinci_nand.c
Freescale QE/FMAN Firmware Support:
-----------------------------------
- CONFIG_SYS_FMAN_FW_ADDR
The address in the storage device where the FMAN microcode is located. The
- meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro
+ meaning of this address depends on which CONFIG_SYS_QE_FMAN_FW_IN_xxx macro
is also specified.
- CONFIG_SYS_QE_FW_ADDR
The address in the storage device where the QE microcode is located. The
- meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro
+ meaning of this address depends on which CONFIG_SYS_QE_FMAN_FW_IN_xxx macro
is also specified.
- CONFIG_SYS_QE_FMAN_FW_LENGTH
projects / oweals / u-boot.git / blobdiff