- loads U-Boot or (in falcon mode) Linux
-
Configuration Options:
----------------------
Board config to use DDR3L. It can be enabled for SoCs with
DDR3L controllers.
- CONFIG_SYS_FSL_DDR4
- Board config to use DDR4. It can be enabled for SoCs with
- DDR4 controllers.
-
CONFIG_SYS_FSL_IFC_BE
Defines the IFC controller register space as Big Endian
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
-
- CONFIG_SYS_FSL_PBL_RCW
- It adds PBI(pre-boot instructions) commands in u-boot build image.
- PBI commands can be used to configure SoC before it starts the execution.
- Please refer doc/README.pblimage for more details
-
CONFIG_SYS_FSL_DDR_BE
Defines the DDR controller register space as Big Endian
crash. This is needed for buggy hardware (uc101) where
no pull down resistor is connected to the signal IDE5V_DD7.
- CONFIG_MACH_TYPE [relevant for ARM only][mandatory]
-
- This setting is mandatory for all boards that have only one
- machine type and must be used to specify the machine type
- number as it appears in the ARM machine registry
- (see https://www.arm.linux.org.uk/developer/machines/).
- Only boards that have multiple machine types supported
- in a single configuration file and the machine type is
- runtime discoverable, do not have to use this setting.
-
- vxWorks boot parameters:
bootvx constructs a valid bootline using the following
time on others. This setting #define's the initial
value of the "loads_echo" environment variable.
-- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined)
- CONFIG_KGDB_BAUDRATE
- Select one of the baudrates listed in
- CONFIG_SYS_BAUDRATE_TABLE, see below.
-
- Removal of commands
If no commands are needed to boot, you can disable
CONFIG_CMDLINE to remove them. In this case, the command line
Support for National dp8382[01] gigabit chips.
- NETWORK Support (other):
-
- CONFIG_DRIVER_AT91EMAC
- Support for AT91RM9200 EMAC.
-
- CONFIG_RMII
- Define this to use reduced MII inteface
-
- CONFIG_DRIVER_AT91EMAC_QUIET
- If this defined, the driver is quiet.
- The driver doen't show link status messages.
-
CONFIG_CALXEDA_XGMAC
Support for the Calxeda XGMAC device
Defines the size and behavior of the NAND that SPL uses
to read U-Boot
- CONFIG_SYS_NAND_U_BOOT_OFFS
- Location in NAND to read U-Boot from
-
CONFIG_SYS_NAND_U_BOOT_DST
Location in memory to load U-Boot to
CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM:
Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM)
-- CONFIG_PCI_INDIRECT_BRIDGE:
- Enable support for indirect PCI bridges.
-
- CONFIG_SYS_SRIO:
Chip has SRIO or not
This only takes effect if the memory commands are activated
globally (CONFIG_CMD_MEMORY).
-- CONFIG_SKIP_LOWLEVEL_INIT
- [ARM, NDS32, MIPS, RISC-V only] If this variable is defined, then certain
- low level initializations (like setting up the memory
- controller) are omitted and/or U-Boot does not
- relocate itself into RAM.
-
- Normally this variable MUST NOT be defined. The only
- exception is when U-Boot is loaded (to RAM) by some
- other boot loader or by a debugger which performs
- these initializations itself.
-
-- CONFIG_SKIP_LOWLEVEL_INIT_ONLY
- [ARM926EJ-S only] This allows just the call to lowlevel_init()
- to be skipped. The normal CP15 init (such as enabling the
- instruction cache) is still performed.
-
- CONFIG_SPL_BUILD
Set when the currently-running compilation is for an artifact
that will end up in the SPL (as opposed to the TPL or U-Boot