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https://github.com/AsahiLinux/u-boot
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README: update documentation (availability, links, etc.)
Signed-off-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Wolfgang Denk
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1 changed files with 94 additions and 63 deletions
157
README
157
README
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@ -1,5 +1,5 @@
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#
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# (C) Copyright 2000 - 2005
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# (C) Copyright 2000 - 2008
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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@ -51,7 +51,8 @@ Makefile have been tested to some extent and can be considered
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"working". In fact, many of them are used in production systems.
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In case of problems see the CHANGELOG and CREDITS files to find out
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who contributed the specific port.
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who contributed the specific port. The MAINTAINERS file lists board
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maintainers.
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Where to get help:
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@ -65,6 +66,22 @@ before asking FAQ's. Please see
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http://lists.sourceforge.net/lists/listinfo/u-boot-users/
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Where to get source code:
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=========================
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The U-Boot source code is maintained in the git repository at
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git://www.denx.de/git/u-boot.git ; you can browse it online at
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http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary
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The "snapshot" links on this page allow you to download tarballs of
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any version you might be interested in. Ofifcial releases are also
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available for FTP download from the ftp://ftp.denx.de/pub/u-boot/
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directory.
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Pre-build (and tested) images are available from
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ftp://ftp.denx.de/pub/u-boot/images/
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Where we come from:
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===================
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@ -81,6 +98,7 @@ Where we come from:
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- create ARMBoot project (http://sourceforge.net/projects/armboot)
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- add other CPU families (starting with ARM)
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- create U-Boot project (http://sourceforge.net/projects/u-boot)
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- current project page: see http://www.denx.de/wiki/UBoot
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Names and Spelling:
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@ -168,7 +186,7 @@ Directory Hierarchy:
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- lib_mips Files generic to MIPS architecture
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- lib_nios Files generic to NIOS architecture
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- lib_ppc Files generic to PowerPC architecture
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- libfdt Library files to support flattened device trees
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- libfdt Library files to support flattened device trees
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- net Networking code
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- post Power On Self Test
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- rtc Real Time Clock drivers
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@ -320,7 +338,7 @@ The following options need to be configured:
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converts clock data to MHZ before passing it to the
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Linux kernel.
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When CONFIG_CLOCKS_IN_MHZ is defined, a definition of
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"clocks_in_mhz=1" is automatically included in the
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"clocks_in_mhz=1" is automatically included in the
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default environment.
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CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only]
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@ -686,9 +704,9 @@ The following options need to be configured:
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CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION
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and/or CONFIG_ISO_PARTITION
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If IDE or SCSI support is enabled (CONFIG_CMD_IDE or
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CONFIG_CMD_SCSI) you must configure support for at least
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one partition type as well.
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If IDE or SCSI support is enabled (CONFIG_CMD_IDE or
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CONFIG_CMD_SCSI) you must configure support for at
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least one partition type as well.
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- IDE Reset method:
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CONFIG_IDE_RESET_ROUTINE - this is defined in several
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@ -1325,7 +1343,7 @@ The following options need to be configured:
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This option specifies a list of I2C devices that will be skipped
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when the 'i2c probe' command is issued (or 'iprobe' using the legacy
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command). If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device
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pairs. Otherwise, specify a 1D array of device addresses
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pairs. Otherwise, specify a 1D array of device addresses
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e.g.
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#undef CONFIG_I2C_MULTI_BUS
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@ -2324,22 +2342,24 @@ Low Level (hardware related) configuration options:
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Overrides the default PCI memory map in cpu/mpc8260/pci.c if set.
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- CONFIG_SPD_EEPROM
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Get DDR timing information from an I2C EEPROM. Common with pluggable
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memory modules such as SODIMMs
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Get DDR timing information from an I2C EEPROM. Common
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with pluggable memory modules such as SODIMMs
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SPD_EEPROM_ADDRESS
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I2C address of the SPD EEPROM
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- CFG_SPD_BUS_NUM
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If SPD EEPROM is on an I2C bus other than the first one, specify here.
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Note that the value must resolve to something your driver can deal with.
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If SPD EEPROM is on an I2C bus other than the first
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one, specify here. Note that the value must resolve
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to something your driver can deal with.
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- CFG_83XX_DDR_USES_CS0
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Only for 83xx systems. If specified, then DDR should be configured
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using CS0 and CS1 instead of CS2 and CS3.
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Only for 83xx systems. If specified, then DDR should
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be configured using CS0 and CS1 instead of CS2 and CS3.
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- CFG_83XX_DDR_USES_CS0
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Only for 83xx systems. If specified, then DDR should be configured
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using CS0 and CS1 instead of CS2 and CS3.
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Only for 83xx systems. If specified, then DDR should
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be configured using CS0 and CS1 instead of CS2 and CS3.
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- CONFIG_ETHER_ON_FEC[12]
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Define to enable FEC[12] on a 8xx series processor.
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@ -2405,29 +2425,30 @@ Low Level (hardware related) configuration options:
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Building the Software:
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======================
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Building U-Boot has been tested in native PPC environments (on a
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PowerBook G3 running LinuxPPC 2000) and in cross environments
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(running RedHat 6.x and 7.x Linux on x86, Solaris 2.6 on a SPARC, and
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NetBSD 1.5 on x86).
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Building U-Boot has been tested in several native build environments
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and in many different cross environments. Of course we cannot support
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all possibly existing versions of cross development tools in all
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(potentially obsolete) versions. In case of tool chain problems we
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recommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK)
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which is extensively used to build and test U-Boot.
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If you are not using a native PPC environment, it is assumed that you
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have the GNU cross compiling tools available in your path and named
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with a prefix of "powerpc-linux-". If this is not the case, (e.g. if
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you are using Monta Vista's Hard Hat Linux CDK 1.2) you must change
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the definition of CROSS_COMPILE in Makefile. For HHL on a 4xx CPU,
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change it to:
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If you are not using a native environment, it is assumed that you
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have GNU cross compiling tools available in your path. In this case,
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you must set the environment variable CROSS_COMPILE in your shell.
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Note that no changes to the Makefile or any other source files are
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necessary. For example using the ELDK on a 4xx CPU, please enter:
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CROSS_COMPILE = ppc_4xx-
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$ CROSS_COMPILE=ppc_4xx-
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$ export CROSS_COMPILE
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U-Boot is intended to be simple to build. After installing the
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sources you must configure U-Boot for one specific board type. This
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U-Boot is intended to be simple to build. After installing the
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sources you must configure U-Boot for one specific board type. This
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is done by typing:
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make NAME_config
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where "NAME_config" is the name of one of the existing
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configurations; see the main Makefile for supported names.
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where "NAME_config" is the name of one of the existing configu-
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rations; see the main Makefile for supported names.
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Note: for some board special configuration names may exist; check if
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additional information is available from the board vendor; for
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@ -2503,20 +2524,20 @@ steps:
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Testing of U-Boot Modifications, Ports to New Hardware, etc.:
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==============================================================
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If you have modified U-Boot sources (for instance added a new board
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or support for new devices, a new CPU, etc.) you are expected to
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If you have modified U-Boot sources (for instance added a new board
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or support for new devices, a new CPU, etc.) you are expected to
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provide feedback to the other developers. The feedback normally takes
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the form of a "patch", i. e. a context diff against a certain (latest
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official or latest in CVS) version of U-Boot sources.
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official or latest in the git repository) version of U-Boot sources.
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But before you submit such a patch, please verify that your modifi-
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cation did not break existing code. At least make sure that *ALL* of
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But before you submit such a patch, please verify that your modifi-
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cation did not break existing code. At least make sure that *ALL* of
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the supported boards compile WITHOUT ANY compiler warnings. To do so,
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just run the "MAKEALL" script, which will configure and build U-Boot
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for ALL supported system. Be warned, this will take a while. You can
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select which (cross) compiler to use by passing a `CROSS_COMPILE'
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environment variable to the script, i. e. to use the cross tools from
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MontaVista's Hard Hat Linux you can type
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for ALL supported system. Be warned, this will take a while. You can
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select which (cross) compiler to use by passing a `CROSS_COMPILE'
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environment variable to the script, i. e. to use the ELDK cross tools
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you can type
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CROSS_COMPILE=ppc_8xx- MAKEALL
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@ -2524,20 +2545,21 @@ or to build on a native PowerPC system you can type
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CROSS_COMPILE=' ' MAKEALL
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When using the MAKEALL script, the default behaviour is to build U-Boot
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in the source directory. This location can be changed by setting the
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BUILD_DIR environment variable. Also, for each target built, the MAKEALL
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script saves two log files (<target>.ERR and <target>.MAKEALL) in the
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<source dir>/LOG directory. This default location can be changed by
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setting the MAKEALL_LOGDIR environment variable. For example:
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When using the MAKEALL script, the default behaviour is to build
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U-Boot in the source directory. This location can be changed by
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setting the BUILD_DIR environment variable. Also, for each target
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built, the MAKEALL script saves two log files (<target>.ERR and
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<target>.MAKEALL) in the <source dir>/LOG directory. This default
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location can be changed by setting the MAKEALL_LOGDIR environment
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variable. For example:
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export BUILD_DIR=/tmp/build
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export MAKEALL_LOGDIR=/tmp/log
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CROSS_COMPILE=ppc_8xx- MAKEALL
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With the above settings build objects are saved in the /tmp/build, log
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files are saved in the /tmp/log and the source tree remains clean during
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the whole build process.
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With the above settings build objects are saved in the /tmp/build,
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log files are saved in the /tmp/log and the source tree remains clean
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during the whole build process.
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See also "U-Boot Porting Guide" below.
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@ -3093,7 +3115,7 @@ TQM8xxL is in the first Flash bank):
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You can check the success of the download using the 'iminfo' command;
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this includes a checksum verification so you can be sure no data
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this includes a checksum verification so you can be sure no data
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corruption happened:
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=> imi 40100000
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@ -3438,7 +3460,7 @@ models provide on-chip memory (like the IMMR area on MPC8xx and
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MPC826x processors), on others (parts of) the data cache can be
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locked as (mis-) used as memory, etc.
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Chris Hallinan posted a good summary of these issues to the
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Chris Hallinan posted a good summary of these issues to the
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u-boot-users mailing list:
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Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)?
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@ -3728,6 +3750,8 @@ may be rejected, even when they contain important and valuable stuff.
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Patches shall be sent to the u-boot-users mailing list.
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Please see http://www.denx.de/wiki/UBoot/Patches for details.
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When you send a patch, please include the following information with
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it:
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@ -3748,18 +3772,23 @@ it:
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* If your patch adds new configuration options, don't forget to
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document these in the README file.
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* The patch itself. If you are accessing the CVS repository use "cvs
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update; cvs diff -puRN"; else, use "diff -purN OLD NEW". If your
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version of diff does not support these options, then get the latest
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version of GNU diff.
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* The patch itself. If you are using git (which is *strongly*
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recommended) you can easily generate the patch using the
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"git-format-patch". If you then use "git-send-email" to send it to
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the U-Boot mailing list, you will avoid most of the common problems
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with some other mail clients.
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The current directory when running this command shall be the top
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level directory of the U-Boot source tree, or it's parent directory
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(i. e. please make sure that your patch includes sufficient
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directory information for the affected files).
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If you cannot use git, use "diff -purN OLD NEW". If your version of
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diff does not support these options, then get the latest version of
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GNU diff.
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We accept patches as plain text, MIME attachments or as uuencoded
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gzipped text.
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The current directory when running this command shall be the parent
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directory of the U-Boot source tree (i. e. please make sure that
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your patch includes sufficient directory information for the
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affected files).
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We prefer patches as plain text. MIME attachments are discouraged,
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and compressed attachments must not be used.
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* If one logical set of modifications affects or creates several
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files, all these changes shall be submitted in a SINGLE patch file.
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@ -3786,4 +3815,6 @@ Notes:
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modification.
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* Remember that there is a size limit of 40 kB per message on the
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u-boot-users mailing list. Compression may help.
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u-boot-users mailing list. Bigger patches will be moderated. If
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they are reasonable and not bigger than 100 kB, they will be
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acknowledged. Even bigger patches should be avoided.
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