boot loader that has already initialized the UART. Define this
variable to flush the UART at init time.
+ CONFIG_SYS_NS16550_BROKEN_TEMT
+
+ 16550 UART set the Transmitter Empty (TEMT) Bit when all output
+ has finished and the transmitter is totally empty. U-Boot waits
+ for this bit to be set to initialize the serial console. On some
+ broken platforms this bit is not set in SPL making U-Boot to
+ hang while waiting for TEMT. Define this option to avoid it.
+
- Console Interface:
Depending on board, define exactly one serial port
CONFIG_CMD_LOADS loads
CONFIG_CMD_MD5SUM print md5 message digest
(requires CONFIG_CMD_MEMORY and CONFIG_MD5)
+ CONFIG_CMD_MEMINFO * Display detailed memory information
CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base,
loop, loopw, mtest
CONFIG_CMD_MISC Misc functions like sleep etc
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
+ intialised so that it is available to U-Boot. This inhibits
+ that so that the environment is not available until
+ explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL
+ this is instead controlled by the value of
+ /config/load-environment.
+
- DataFlash Support:
CONFIG_HAS_DATAFLASH
CONFIG_SF_DEFAULT_MODE (see include/spi.h)
CONFIG_SF_DEFAULT_SPEED in Hz
+ CONFIG_CMD_SF_TEST
+
+ Define this option to include a destructive SPI flash
+ test ('sf test').
+
- SystemACE Support:
CONFIG_SYSTEMACE
CONFIG_FB_ADDR
Define CONFIG_FB_ADDR if you want to use specific
- address for frame buffer.
- Then system will reserve the frame buffer address to
- defined address instead of lcd_setmem (this function
- grabs the memory for frame buffer by panel's size).
+ 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.
space for already greatly restricted images, including but not
limited to NAND_SPL configurations.
+- CONFIG_DISPLAY_BOARDINFO
+ Display information about the board that U-Boot is running on
+ when U-Boot starts up. The board function checkboard() is called
+ to do this.
+
+- CONFIG_DISPLAY_BOARDINFO_LATE
+ Similar to the previous option, but display this information
+ later, once stdio is running and output goes to the LCD, if
+ present.
+
Low Level (hardware related) configuration options:
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