such as ARM architectural timer initialization.
- Linux Kernel Interface:
- CONFIG_CLOCKS_IN_MHZ
-
- U-Boot stores all clock information in Hz
- internally. For binary compatibility with older Linux
- kernels (which expect the clocks passed in the
- bd_info data to be in MHz) the environment variable
- "clocks_in_mhz" can be defined so that U-Boot
- converts clock data to MHZ before passing it to the
- Linux kernel.
- When CONFIG_CLOCKS_IN_MHZ is defined, a definition of
- "clocks_in_mhz=1" is automatically included in the
- default environment.
-
CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only]
When transferring memsize parameter to Linux, some versions
Define this variable to enable hw flow control in serial driver.
Current user of this option is drivers/serial/nsl16550.c driver
-- Console Baudrate:
- CONFIG_BAUDRATE - in bps
- Select one of the baudrates listed in
- CONFIG_SYS_BAUDRATE_TABLE, see below.
-
- Autoboot Command:
CONFIG_BOOTCOMMAND
Only needed when CONFIG_BOOTDELAY is enabled;
Allow generic access to the SPI bus on the Intel 8257x, for
example with the "sspi" command.
- CONFIG_EEPRO100
- Support for Intel 82557/82559/82559ER chips.
-
CONFIG_TULIP
Support for Digital 2114x chips.
mm - memory modify (auto-incrementing)
nm - memory modify (constant address)
mw - memory write (fill)
+ms - memory search
cp - memory copy
cmp - memory compare
crc32 - checksum calculation
CONFIG_NET_RETRY_COUNT, if defined. This value has
precedence over the valu based on CONFIG_NET_RETRY_COUNT.
+ memmatches - Number of matches found by the last 'ms' command, in hex
+
+ memaddr - Address of the last match found by the 'ms' command, in hex,
+ or 0 if none
+
+ mempos - Index position of the last match found by the 'ms' command,
+ in units of the size (.b, .w, .l) of the search
+
+
The following image location variables contain the location of images
used in booting. The "Image" column gives the role of the image and is
not an environment variable name. The other columns are environment