Examples:
U-Boot v2009.11 - Release November 2009
U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree
- U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release
+ U-Boot v2010.09-rc1 - Release candidate 1 for September 2010 release
Directory Hierarchy:
/arc Files generic to ARC architecture
/arm Files generic to ARM architecture
/avr32 Files generic to AVR32 architecture
- /blackfin Files generic to Analog Devices Blackfin architecture
/m68k Files generic to m68k architecture
/microblaze Files generic to microblaze architecture
/mips Files generic to MIPS architecture
/powerpc Files generic to PowerPC architecture
/sandbox Files generic to HW-independent "sandbox"
/sh Files generic to SH architecture
- /sparc Files generic to SPARC architecture
/x86 Files generic to x86 architecture
/api Machine/arch independent API for external apps
/board Board dependent files
Defines the string to utilize when trying to match PCIe device
tree nodes for the given platform.
- CONFIG_SYS_PPC_E500_DEBUG_TLB
-
- Enables a temporary TLB entry to be used during boot to work
- around limitations in e500v1 and e500v2 external debugger
- support. This reduces the portions of the boot code where
- breakpoints and single stepping do not work. The value of this
- symbol should be set to the TLB1 entry to be used for this
- purpose.
-
CONFIG_SYS_FSL_ERRATUM_A004510
Enables a workaround for erratum A004510. If set,
CONFIG_SYS_FSL_IFC_LE
Defines the IFC controller register space as Little Endian
+ CONFIG_SYS_FSL_IFC_CLK_DIV
+ Defines divider of platform clock(clock input to IFC controller).
+
+ CONFIG_SYS_FSL_LBC_CLK_DIV
+ Defines divider of platform clock(clock input to eLBC controller).
+
CONFIG_SYS_FSL_PBL_PBI
It enables addition of RCW (Power on reset configuration) in built image.
Please refer doc/README.pblimage for more details
Select high exception vectors of the ARM core, e.g., do not
clear the V bit of the c1 register of CP15.
- CONFIG_SYS_THUMB_BUILD
-
- Use this flag to build U-Boot using the Thumb instruction
- set for ARM architectures. Thumb instruction set provides
- better code density. For ARM architectures that support
- Thumb2 this flag will result in Thumb2 code generated by
- GCC.
-
- CONFIG_ARM_ERRATA_716044
- CONFIG_ARM_ERRATA_742230
- CONFIG_ARM_ERRATA_743622
- CONFIG_ARM_ERRATA_751472
- CONFIG_ARM_ERRATA_761320
- CONFIG_ARM_ERRATA_773022
- CONFIG_ARM_ERRATA_774769
- CONFIG_ARM_ERRATA_794072
-
- If set, the workarounds for these ARM errata are applied early
- during U-Boot startup. Note that these options force the
- workarounds to be applied; no CPU-type/version detection
- exists, unlike the similar options in the Linux kernel. Do not
- set these options unless they apply!
-
COUNTER_FREQUENCY
Generic timer clock source frequency.
different from COUNTER_FREQUENCY, and can only be determined
at run time.
- NOTE: The following can be machine specific errata. These
- do have ability to provide rudimentary version and machine
- specific checks, but expect no product checks.
- CONFIG_ARM_ERRATA_430973
- CONFIG_ARM_ERRATA_454179
- CONFIG_ARM_ERRATA_621766
- CONFIG_ARM_ERRATA_798870
- CONFIG_ARM_ERRATA_801819
-
- Tegra SoC options:
CONFIG_TEGRA_SUPPORT_NON_SECURE
port routines must be defined elsewhere
(i.e. serial_init(), serial_getc(), ...)
- CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default
- is 0x00.
- CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default
- is 0xa0.
-
- Console Baudrate:
CONFIG_BAUDRATE - in bps
Select one of the baudrates listed in
CONFIG_SH_MMCIF_CLK
Define the clock frequency for MMCIF
- CONFIG_GENERIC_MMC
- Enable the generic MMC driver
-
CONFIG_SUPPORT_EMMC_BOOT
Enable some additional features of the eMMC boot partitions.
This will also enable the command "fatwrite" enabling the
user to write files to FAT.
-CBFS (Coreboot Filesystem) support
+- CBFS (Coreboot Filesystem) support:
CONFIG_CMD_CBFS
Define this to enable support for reading from a Coreboot
instead.
- Video support:
- CONFIG_VIDEO_SMI_LYNXEM
- Enable Silicon Motion SMI 712/710/810 Video chip. The
- video output is selected via environment 'videoout'
- (1 = LCD and 2 = CRT). If videoout is undefined, CRT is
- assumed.
-
- CONFIG_VIDEO_SED13806
- Enable Epson SED13806 driver. This driver supports 8bpp
- and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP
- or CONFIG_VIDEO_SED13806_16BPP
-
CONFIG_FSL_DIU_FB
Enable the Freescale DIU video driver. Reference boards for
SOCs that have a DIU should define this macro to enable DIU
here, since it is cheaper to change data cache settings on
a per-section basis.
- CONFIG_CONSOLE_SCROLL_LINES
-
- When the console need to be scrolled, this is the number of
- lines to scroll by. It defaults to 1. Increasing this makes
- the console jump but can help speed up operation when scrolling
- is slow.
CONFIG_LCD_ROTATION
can be displayed via the splashscreen support or the
bmp command.
-- Do compressing for memory range:
- CONFIG_CMD_ZIP
-
- If this option is set, it would use zlib deflate method
- to compress the specified memory at its best effort.
-
- Compression support:
CONFIG_GZIP
A byte containing the id of the VLAN.
-- Status LED: CONFIG_STATUS_LED
+- Status LED: CONFIG_LED_STATUS
Several configurations allow to display the current
status using a LED. For instance, the LED will blink
soon as a reply to a BOOTP request was received, and
start blinking slow once the Linux kernel is running
(supported by a status LED driver in the Linux
- kernel). Defining CONFIG_STATUS_LED enables this
+ kernel). Defining CONFIG_LED_STATUS enables this
feature in U-Boot.
Additional options:
- CONFIG_GPIO_LED
+ CONFIG_LED_STATUS_GPIO
The status LED can be connected to a GPIO pin.
In such cases, the gpio_led driver can be used as a
- status LED backend implementation. Define CONFIG_GPIO_LED
+ status LED backend implementation. Define CONFIG_LED_STATUS_GPIO
to include the gpio_led driver in the U-Boot binary.
CONFIG_GPIO_LED_INVERTED_TABLE
this is instead controlled by the value of
/config/load-environment.
-- Parallel Flash support:
- CONFIG_SYS_NO_FLASH
-
- Traditionally U-Boot was run on systems with parallel NOR
- flash. This option is used to disable support for parallel NOR
- flash. This option should be defined if the board does not have
- parallel flash.
-
- If this option is not defined one of the generic flash drivers
- (e.g. CONFIG_FLASH_CFI_DRIVER or CONFIG_ST_SMI) must be
- selected or the board must provide an implementation of the
- flash API (see include/flash.h).
-
- DataFlash Support:
CONFIG_HAS_DATAFLASH
CONFIG_AT91SAM9XE
enable special bootcounter support on at91sam9xe based boards.
- CONFIG_BLACKFIN
- enable special bootcounter support on blackfin based boards.
CONFIG_SOC_DA8XX
enable special bootcounter support on da850 based boards.
CONFIG_BOOTCOUNT_RAM
consider that a completely unreadable NAND block is bad,
and thus should be skipped silently.
- CONFIG_SPL_ABORT_ON_RAW_IMAGE
- When defined, SPL will proceed to another boot method
- if the image it has loaded does not have a signature.
-
CONFIG_SPL_RELOC_STACK
Adress of the start of the stack SPL will use after
relocation. If unspecified, this is equal to
CONFIG_SPL_INIT_MINIMAL
Arch init code should be built for a very small image
- CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
- CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS,
- Address and partition on the MMC to load U-Boot from
- when the MMC is being used in raw mode.
-
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
Partition on the MMC to load U-Boot from when the MMC is being
used in raw mode
- CONFIG_SYS_BAUDRATE_TABLE:
List of legal baudrate settings for this board.
-- CONFIG_SYS_CONSOLE_INFO_QUIET
- Suppress display of console information at boot.
-
-- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
- Enable the call to overwrite_console().
-
-- CONFIG_SYS_CONSOLE_ENV_OVERWRITE
- Enable overwrite of previous console environment settings.
-
- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END:
Begin and End addresses of the area used by the
simple memory test.
Define this to a string that is the name of the block device.
- - FAT_ENV_DEV_AND_PART:
+ - FAT_ENV_DEVICE_AND_PART:
Define this to a string to specify the partition of the device. It can
be as following:
addressable memory. This option causes some memory accesses
to be mapped through map_sysmem() / unmap_sysmem().
-- 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.
-
- CONFIG_X86_RESET_VECTOR
If defined, the x86 reset vector code is included. This is not
needed when U-Boot is running from Coreboot.
average for all boards 752 bytes for the whole U-Boot image,
624 text + 127 data).
-On Blackfin, the normal C ABI (except for P3) is followed as documented here:
- http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface
-
- ==> U-Boot will use P3 to hold a pointer to the global data
-
On ARM, the following registers are used:
R0: function argument word/integer result
projects / oweals / u-boot.git / blobdiff