SPL-specific notes:
- stack is optionally in SDRAM, if CONFIG_SPL_STACK_R is defined and
- CONFIG_SPL_STACK_R_ADDR points into SDRAM
- - preloader_console_init() can be called here - typically this is
- done by selecting CONFIG_SPL_BOARD_INIT and then supplying a
- spl_board_init() function containing this call
- - loads U-Boot or (in falcon mode) Linux
-
-
-Configuration Options:
-----------------------
-
-Configuration depends on the combination of board and CPU type; all
-such information is kept in a configuration file
-"include/configs/<board_name>.h".
-
-Example: For a TQM823L module, all configuration settings are in
-"include/configs/TQM823L.h".
-
-
-Many of the options are named exactly as the corresponding Linux
-kernel configuration options. The intention is to make it easier to
-build a config tool - later.
-
-- ARM Platform Bus Type(CCI):
- CoreLink Cache Coherent Interconnect (CCI) is ARM BUS which
- provides full cache coherency between two clusters of multi-core
- CPUs and I/O coherency for devices and I/O masters
-
CONFIG_SYS_FSL_HAS_CCI400
Defined For SoC that has cache coherent interconnect
Defines the SEC controller register space as Little Endian
- MIPS CPU options:
- CONFIG_SYS_INIT_SP_OFFSET
-
- Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack
- pointer. This is needed for the temporary stack before
- relocation.
-
CONFIG_XWAY_SWAP_BYTES
Enable compilation of tools/xway-swap-bytes needed for Lantiq
CONFIG_SPL_BSS_START_ADDR
Link address for the BSS within the SPL binary.
- CONFIG_SPL_STACK
- Adress of the start of the stack SPL will use
-
CONFIG_SPL_PANIC_ON_RAW_IMAGE
When defined, SPL will panic() 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_STACK.
-
CONFIG_SYS_SPL_MALLOC_START
Starting address of the malloc pool used in SPL.
When this option is set the full malloc is used in SPL and
U-Boot uses the following memory types:
- MPC8xx: IMMR (internal memory of the CPU)
-- CONFIG_SYS_GBL_DATA_OFFSET:
-
- Offset of the initial data structure in the memory
- area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually
- CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial
- data is located at the end of the available space
- (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE -
- GENERATED_GBL_DATA_SIZE), and the initial stack is just
- below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR +
- CONFIG_SYS_GBL_DATA_OFFSET) downward.
-
- Note:
- On the MPC824X (or other systems that use the data
- cache for initial memory) the address chosen for
- CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must
- point to an otherwise UNUSED address space between
- the top of RAM and the start of the PCI space.
-
- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27)
- CONFIG_SYS_OR_TIMING_SDRAM: