index 9702067174e361eb94383839e984d9ae6df4075c..2572add57303c5596d87d740f63edd4a494c48e9 100644 (file)
--- a/README
+++ b/README
ICache only when Code runs from RAM.
- 85xx CPU Options:
+ CONFIG_SYS_PPC64
+
+ Specifies that the core is a 64-bit PowerPC implementation (implements
+ the "64" category of the Power ISA). This is necessary for ePAPR
+ compliance, among other possible reasons.
+
CONFIG_SYS_FSL_TBCLK_DIV
Defines the core time base clock divider ratio compared to the
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,
+ then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and
+ CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set.
+
+ CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV
+ CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional)
+
+ Defines one or two SoC revisions (low 8 bits of SVR)
+ for which the A004510 workaround should be applied.
+
+ The rest of SVR is either not relevant to the decision
+ of whether the erratum is present (e.g. p2040 versus
+ p2041) or is implied by the build target, which controls
+ whether CONFIG_SYS_FSL_ERRATUM_A004510 is set.
+
+ See Freescale App Note 4493 for more information about
+ this erratum.
+
+ CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY
+
+ This is the value to write into CCSR offset 0x18600
+ according to the A004510 workaround.
+
- Generic CPU options:
CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
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.
+
- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ
additional board info beside
the logo
+ When CONFIG_CFB_CONSOLE_ANSI is defined, console will support
+ a limited number of ANSI escape sequences (cursor control,
+ erase functions and limited graphics rendition control).
+
When CONFIG_CFB_CONSOLE is defined, video console is
default i/o. Serial console can be forced with
environment 'console=serial'.
- Boot Delay: CONFIG_BOOTDELAY - in seconds
Delay before automatically booting the default image;
set to -1 to disable autoboot.
+ set to -2 to autoboot with no delay and not check for abort
+ (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined).
See doc/README.autoboot for these options that
work with CONFIG_BOOTDELAY. None are required.
- Monitor Functions:
Monitor commands can be included or excluded
from the build by using the #include files
- "config_cmd_all.h" and #undef'ing unwanted
- commands, or using "config_cmd_default.h"
+ <config_cmd_all.h> and #undef'ing unwanted
+ commands, or using <config_cmd_default.h>
and augmenting with additional #define's
for wanted commands.
CONFIG_CMD_IMLS List all found images
CONFIG_CMD_IMMAP * IMMR dump support
CONFIG_CMD_IMPORTENV * import an environment
+ CONFIG_CMD_INI * import data from an ini file into the env
CONFIG_CMD_IRQ * irqinfo
CONFIG_CMD_ITEST Integer/string test of 2 values
CONFIG_CMD_JFFS2 * JFFS2 Support
CONFIG_CMD_KGDB * kgdb
CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader)
+ CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration
+ (169.254.*.*)
CONFIG_CMD_LOADB loadb
CONFIG_CMD_LOADS loads
CONFIG_CMD_MD5SUM print md5 message digest
CONFIG_CMD_SPI * SPI serial bus support
CONFIG_CMD_TFTPSRV * TFTP transfer in server mode
CONFIG_CMD_TFTPPUT * TFTP put command (upload)
- CONFIG_CMD_TIME * run command and report execution time
+ CONFIG_CMD_TIME * run command and report execution time (ARM specific)
+ CONFIG_CMD_TIMER * access to the system tick timer
CONFIG_CMD_USB * USB support
CONFIG_CMD_CDP * Cisco Discover Protocol support
- CONFIG_CMD_FSL * Microblaze FSL support
+ CONFIG_CMD_MFSL * Microblaze FSL support
EXAMPLE: If you want all functions except of network
If this variable is defined, an environment variable
named "ver" is created by U-Boot showing the U-Boot
version as printed by the "version" command.
- This variable is readonly.
+ Any change to this variable will be reverted at the
+ next reset.
- Real-Time Clock:
commands like bootm or iminfo. This option is
automatically enabled when you select CONFIG_CMD_DATE .
-- Partition Support:
- CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION
- and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION
+- Partition Labels (disklabels) Supported:
+ Zero or more of the following:
+ CONFIG_MAC_PARTITION Apple's MacOS partition table.
+ CONFIG_DOS_PARTITION MS Dos partition table, traditional on the
+ Intel architecture, USB sticks, etc.
+ CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc.
+ CONFIG_EFI_PARTITION GPT partition table, common when EFI is the
+ bootloader. Note 2TB partition limit; see
+ disk/part_efi.c
+ CONFIG_MTD_PARTITIONS Memory Technology Device partition table.
If IDE or SCSI support is enabled (CONFIG_CMD_IDE or
CONFIG_CMD_SCSI) you must configure support for at
- least one partition type as well.
+ least one non-MTD partition type as well.
- IDE Reset method:
CONFIG_IDE_RESET_ROUTINE - this is defined in several
CONFIG_CALXEDA_XGMAC
Support for the Calxeda XGMAC device
- CONFIG_DRIVER_LAN91C96
+ CONFIG_LAN91C96
Support for SMSC's LAN91C96 chips.
CONFIG_LAN91C96_BASE
CONFIG_LAN91C96_USE_32_BIT
Define this to enable 32 bit addressing
- CONFIG_DRIVER_SMC91111
+ CONFIG_SMC91111
Support for SMSC's LAN91C111 chip
CONFIG_SMC91111_BASE
viewport is supported.
To enable the ULPI layer support, define CONFIG_USB_ULPI and
CONFIG_USB_ULPI_VIEWPORT in your board configuration file.
+ If your ULPI phy needs a different reference clock than the
+ standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to
+ the appropriate value in Hz.
- MMC Support:
The MMC controller on the Intel PXA is supported. To
This will also enable the command "fatwrite" enabling the
user to write files to FAT.
+CBFS (Coreboot Filesystem) support
+ CONFIG_CMD_CBFS
+
+ Define this to enable support for reading from a Coreboot
+ filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls
+ and cbfsload.
+
- Keyboard Support:
CONFIG_ISA_KEYBOARD
can be displayed via the splashscreen support or the
bmp command.
+- Do compresssing 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_BZIP2
CONFIG_BOOTP_NTPSERVER
CONFIG_BOOTP_TIMEOFFSET
CONFIG_BOOTP_VENDOREX
+ CONFIG_BOOTP_MAY_FAIL
CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip
environment variable, not the BOOTP server.
+ CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found
+ after the configured retry count, the call will fail
+ instead of starting over. This can be used to fail over
+ to Link-local IP address configuration if the DHCP server
+ is not available.
+
CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
serverip from a DHCP server, it is possible that more
than one DNS serverip is offered to the client.
the DHCP timeout and retry process takes a longer than
this delay.
+ - Link-local IP address negotiation:
+ Negotiate with other link-local clients on the local network
+ for an address that doesn't require explicit configuration.
+ This is especially useful if a DHCP server cannot be guaranteed
+ to exist in all environments that the device must operate.
+
+ See doc/README.link-local for more information.
+
- CDP Options:
CONFIG_CDP_DEVICE_ID
Timeout waiting for an ARP reply in milliseconds.
+ CONFIG_NFS_TIMEOUT
+
+ Timeout in milliseconds used in NFS protocol.
+ If you encounter "ERROR: Cannot umount" in nfs command,
+ try longer timeout such as
+ #define CONFIG_NFS_TIMEOUT 10000UL
+
- Command Interpreter:
CONFIG_AUTO_COMPLETE
the environment like the "source" command or the
boot command first.
+ CONFIG_ENV_VARS_UBOOT_CONFIG
+
+ Define this in order to add variables describing the
+ U-Boot build configuration to the default environment.
+ These will be named arch, cpu, board, vendor, and soc.
+
+ Enabling this option will cause the following to be defined:
+
+ - CONFIG_SYS_ARCH
+ - CONFIG_SYS_CPU
+ - CONFIG_SYS_BOARD
+ - CONFIG_SYS_VENDOR
+ - CONFIG_SYS_SOC
+
- DataFlash Support:
CONFIG_HAS_DATAFLASH
29,916,167 26,005,792 bootm_start
30,361,327 445,160 start_kernel
+ CONFIG_CMD_BOOTSTAGE
+ Add a 'bootstage' command which supports printing a report
+ and un/stashing of bootstage data.
+
+ CONFIG_BOOTSTAGE_FDT
+ Stash the bootstage information in the FDT. A root 'bootstage'
+ node is created with each bootstage id as a child. Each child
+ has a 'name' property and either 'mark' containing the
+ mark time in microsecond, or 'accum' containing the
+ accumulated time for that bootstage id in microseconds.
+ For example:
+
+ bootstage {
+ 154 {
+ name = "board_init_f";
+ mark = <3575678>;
+ };
+ 170 {
+ name = "lcd";
+ accum = <33482>;
+ };
+ };
+
+ Code in the Linux kernel can find this in /proc/devicetree.
+
Legacy uImage format:
Arg Where When
CONFIG_SYS_SPL_MALLOC_SIZE
The size of the malloc pool used in SPL.
+ CONFIG_SPL_FRAMEWORK
+ Enable the SPL framework under common/. This framework
+ supports MMC, NAND and YMODEM loading of U-Boot and NAND
+ NAND loading of the Linux Kernel.
+
+ CONFIG_SPL_DISPLAY_PRINT
+ For ARM, enable an optional function to print more information
+ about the running system.
+
CONFIG_SPL_LIBCOMMON_SUPPORT
Support for common/libcommon.o in SPL binary
CONFIG_SPL_SPI_SUPPORT
Support for drivers/spi/libspi.o in SPL binary
+ CONFIG_SPL_RAM_DEVICE
+ Support for running image already present in ram, in SPL binary
+
CONFIG_SPL_LIBGENERIC_SUPPORT
Support for lib/libgeneric.o in SPL binary
environment area within the total memory of your DataFlash placed
at the specified address.
+- CONFIG_ENV_IS_IN_REMOTE:
+
+ Define this if you have a remote memory space which you
+ want to use for the local device's environment.
+
+ - CONFIG_ENV_ADDR:
+ - CONFIG_ENV_SIZE:
+
+ These two #defines specify the address and size of the
+ environment area within the remote memory space. The
+ local device can get the environment from remote memory
+ space by SRIO or PCIE links.
+
+BE CAREFUL! For some special cases, the local device can not use
+"saveenv" command. For example, the local device will get the
+environment stored in a remote NOR flash by SRIO or PCIE link,
+but it can not erase, write this NOR flash by SRIO or PCIE interface.
+
- CONFIG_ENV_IS_IN_NAND:
Define this if you have a NAND device which you want to use
Disable PCI-Express on systems where it is supported but not
required.
+- CONFIG_PCI_ENUM_ONLY
+ Only scan through and get the devices on the busses.
+ Don't do any setup work, presumably because someone or
+ something has already done it, and we don't need to do it
+ a second time. Useful for platforms that are pre-booted
+ by coreboot or similar.
+
- CONFIG_SYS_SRIO:
Chip has SRIO or not
Specifies that QE/FMAN firmware is located on the primary SPI
device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device.
+- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE
+ Specifies that QE/FMAN firmware is located in the remote (master)
+ memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which
+ can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound
+ window->master inbound window->master LAW->the ucode address in
+ master's memory space.
Building the Software:
======================
make NAME_config
where "NAME_config" is the name of one of the existing configu-
-rations; see the main Makefile for supported names.
+rations; see boards.cfg for supported names.
Note: for some board special configuration names may exist; check if
additional information is available from the board vendor; for
steps:
1. Add a new configuration option for your board to the toplevel
- "Makefile" and to the "MAKEALL" script, using the existing
- entries as examples. Note that here and at many other places
- boards and other names are listed in alphabetical sort order. Please
- keep this order.
+ "boards.cfg" file, using the existing entries as examples.
+ Follow the instructions there to keep the boards in order.
2. Create a new directory to hold your board specific code. Add any
files you need. In your board directory, you will need at least
the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds".
consider minicom to be broken, and recommend not to use it. Under
Unix, I recommend to use C-Kermit for general purpose use (and
especially for kermit binary protocol download ("loadb" command), and
-use "cu" for S-Record download ("loads" command).
+use "cu" for S-Record download ("loads" command). See
+http://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3.
+for help with kermit.
+
Nevertheless, if you absolutely want to use it try adding this
configuration to your "File transfer protocols" section: