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
Enable building of SPL globally.
- CONFIG_SPL_MAX_FOOTPRINT
- Maximum size in memory allocated to the SPL, BSS included.
- When defined, the linker checks that the actual memory
- used by SPL from _start to __bss_end does not exceed it.
- CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
- must not be both defined at the same time.
-
- CONFIG_SPL_MAX_SIZE
- Maximum size of the SPL image (text, data, rodata, and
- linker lists sections), BSS excluded.
- When defined, the linker checks that the actual size does
- not exceed it.
-
CONFIG_SPL_RELOC_TEXT_BASE
Address to relocate to. If unspecified, this is equal to
CONFIG_SPL_TEXT_BASE (i.e. no relocation is done).
CONFIG_SPL_BSS_START_ADDR
Link address for the BSS within the SPL binary.
- CONFIG_SPL_BSS_MAX_SIZE
- Maximum size in memory allocated to the SPL BSS.
- When defined, the linker checks that the actual memory used
- by SPL from __bss_start to __bss_end does not exceed it.
- CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
- must not be both defined at the same time.
-
- 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
For ARM, enable an optional function to print more information
about the running system.
- CONFIG_SPL_INIT_MINIMAL
- Arch init code should be built for a very small image
-
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR,
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS
Sector and number of sectors to load kernel argument
parameters from when MMC is being used in raw mode
(for falcon mode)
- CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
- Filename to read to load U-Boot when reading from filesystem
-
- CONFIG_SPL_FS_LOAD_KERNEL_NAME
- Filename to read to load kernel uImage when reading
- from filesystem (for Falcon mode)
-
- CONFIG_SPL_FS_LOAD_ARGS_NAME
- Filename to read to load kernel argument parameters
- when reading from filesystem (for Falcon mode)
-
CONFIG_SPL_MPC83XX_WAIT_FOR_NAND
Set this for NAND SPL on PPC mpc83xx targets, so that
start.S waits for the rest of the SPL to load before
continuing (the hardware starts execution after just
loading the first page rather than the full 4K).
- CONFIG_SPL_SKIP_RELOCATE
- Avoid SPL relocation
-
CONFIG_SPL_UBI
Support for a lightweight UBI (fastmap) scanner and
loader
- CONFIG_SPL_NAND_RAW_ONLY
- Support to boot only raw u-boot.bin images. Use this only
- if you need to save space.
-
- CONFIG_SPL_COMMON_INIT_DDR
- Set for common ddr init with serial presence detect in
- SPL binary.
-
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,
CONFIG_SPL_RAM_DEVICE
Support for running image already present in ram, in SPL binary
- CONFIG_SPL_PAD_TO
- Image offset to which the SPL should be padded before appending
- the SPL payload. By default, this is defined as
- CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
- CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
- payload without any padding, or >= CONFIG_SPL_MAX_SIZE.
-
CONFIG_SPL_TARGET
Final target image containing SPL and payload. Some SPLs
use an arch-specific makefile fragment instead, for
option to re-enable it. This will affect the output of the
bootm command when booting a FIT image.
-- TPL framework
- CONFIG_TPL
- Enable building of TPL globally.
-
- CONFIG_TPL_PAD_TO
- Image offset to which the TPL should be padded before appending
- the TPL payload. By default, this is defined as
- CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
- CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
- payload without any padding, or >= CONFIG_SPL_MAX_SIZE.
-
- Interrupt support (PPC):
There are common interrupt_init() and timer_interrupt()
- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to
prompt for user input.
-- CONFIG_SYS_CBSIZE: Buffer size for input from the Console
-
-- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to
- the application (usually a Linux kernel) when it is
- booted
-
- CONFIG_SYS_BAUDRATE_TABLE:
List of legal baudrate settings for this board.
used in assembly code, so it must not contain typecasts or
integer size suffixes (e.g. "ULL").
-- CONFIG_SYS_CCSR_DO_NOT_RELOCATE:
- If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be
- forced to a value that ensures that CCSR is not relocated.
-
- CONFIG_SYS_IMMR: Physical address of the Internal Memory.
DO NOT CHANGE unless you know exactly what you're
doing! (11-4) [MPC8xx systems only]
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:
projects / platform / kernel / u-boot.git / blobdiff