RAM and NFS.
- Bootcount:
- CONFIG_BOOTCOUNT_LIMIT
- Implements a mechanism for detecting a repeating reboot
- cycle, see:
- http://www.denx.de/wiki/view/DULG/UBootBootCountLimit
-
CONFIG_BOOTCOUNT_ENV
If no softreset save registers are found on the hardware
"bootcount" is stored in the environment. To prevent a
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
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.
SPI EEPROM, also an instance works with Crystal A/D and
D/As on the SACSng board)
- CONFIG_SH_SPI
-
- Enables the driver for SPI controller on SuperH. Currently
- only SH7757 is supported.
-
CONFIG_SOFT_SPI
Enables a software (bit-bang) SPI driver rather than
Currently supported on some MPC8xxx processors. For an
example, see include/configs/mpc8349emds.h.
- CONFIG_MXC_SPI
-
- Enables the driver for the SPI controllers on i.MX and MXC
- SoCs. Currently i.MX31/35/51 are supported.
-
CONFIG_SYS_SPI_MXC_WAIT
Timeout for waiting until spi transfer completed.
default: (CONFIG_SYS_HZ/100) /* 10 ms */
#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
CONFIG_SF_DEFAULT_MODE (see include/spi.h)
CONFIG_SF_DEFAULT_SPEED in Hz
- CONFIG_SYSTEMACE
-
- Adding this option adds support for Xilinx SystemACE
- chips attached via some sort of local bus. The address
- of the chip must also be defined in the
- CONFIG_SYS_SYSTEMACE_BASE macro. For example:
-
- #define CONFIG_SYSTEMACE
- #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000
-
- When SystemACE support is added, the "ace" device type
- becomes available to the fat commands, i.e. fatls.
- TFTP Fixed UDP Port:
CONFIG_TFTP_PORT
but sometimes that is not allowed.
- bootcount support:
- CONFIG_BOOTCOUNT_LIMIT
-
- This enables the bootcounter support, see:
- http://www.denx.de/wiki/DULG/UBootBootCountLimit
-
CONFIG_AT91SAM9XE
enable special bootcounter support on at91sam9xe based boards.
CONFIG_SOC_DA8XX
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_OS_BOOT
Enable booting directly to an OS from SPL.
See also: doc/README.falcon
Note that the command line "O=" setting overrides the KBUILD_OUTPUT environment
variable.
+User specific CPPFLAGS, AFLAGS and CFLAGS can be passed to the compiler by
+setting the according environment variables KCPPFLAGS, KAFLAGS and KCFLAGS.
+For example to treat all compiler warnings as errors:
+
+ make KCFLAGS=-Werror
Please be aware that the Makefiles assume you are using GNU make, so
for instance on NetBSD you might need to use "gmake" instead of
projects / people / ms / u-boot.git / blobdiff