/blackfin Files generic to Analog Devices Blackfin architecture
/cpu CPU specific files
/lib Architecture specific library files
- /i386 Files generic to i386 architecture
+ /x86 Files generic to x86 architecture
/cpu CPU specific files
/lib Architecture specific library files
/m68k Files generic to m68k architecture
CONFIG_CMD_FLASH flinfo, erase, protect
CONFIG_CMD_FPGA FPGA device initialization support
CONFIG_CMD_GO * the 'go' command (exec code)
+ CONFIG_CMD_GREPENV * search environment
CONFIG_CMD_HWFLOW * RTS/CTS hw flow control
CONFIG_CMD_I2C * I2C serial bus support
CONFIG_CMD_IDE * IDE harddisk support
CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC
CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC
CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337
+ CONFIG_SYS_RV3029_TCR - enable trickle charger on
+ RV3029 RTC.
Note that if the RTC uses I2C, then the I2C interface
must also be configured. See I2C Support, below.
thus overwriting the architecutre dependent default
settings.
+- Frame Buffer Address:
+ 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 grab the memory for frame buffer
+ by panel's size).
+
+ Please see board_init_f function.
+
+ If you want this config option then,
+ please define it at your board config file
+
Legacy uImage format:
Arg Where When
used) must be put below this limit, unless "bootm_low"
enviroment variable is defined and non-zero. In such case
all data for the Linux kernel must be between "bootm_low"
- and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.
+ and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment
+ variable "bootm_mapsize" will override the value of
+ CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined,
+ then the value in "bootm_size" will be used instead.
- CONFIG_SYS_BOOT_RAMDISK_HIGH:
Enable initrd_high functionality. If defined then the
that is executed before the actual U-Boot. E.g. when
compiling a NAND SPL.
+- CONFIG_USE_ARCH_MEMCPY
+ CONFIG_USE_ARCH_MEMSET
+ If these options are used a optimized version of memcpy/memset will
+ be used if available. These functions may be faster under some
+ conditions but may increase the binary size.
+
Building the Software:
======================
for use by the bootm command. See also "bootm_size"
environment variable. Address defined by "bootm_low" is
also the base of the initial memory mapping for the Linux
- kernel -- see the description of CONFIG_SYS_BOOTMAPSZ.
+ kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and
+ bootm_mapsize.
+
+ bootm_mapsize - Size of the initial memory mapping for the Linux kernel.
+ This variable is given as a hexadecimal number and it
+ defines the size of the memory region starting at base
+ address bootm_low that is accessible by the Linux kernel
+ during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used
+ as the default value if it is defined, and bootm_size is
+ used otherwise.
bootm_size - Memory range available for image processing in the bootm
command can be restricted. This variable is given as