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Diffstat (limited to 'README')
| -rw-r--r-- | README | 133 |
1 files changed, 124 insertions, 9 deletions
@@ -132,6 +132,7 @@ Directory Hierarchy: - arm925t Files specific to ARM 925 CPUs - arm926ejs Files specific to ARM 926 CPUs - arm1136 Files specific to ARM 1136 CPUs + - at32ap Files specific to Atmel AVR32 AP CPUs - i386 Files specific to i386 CPUs - ixp Files specific to Intel XScale IXP CPUs - mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs @@ -156,6 +157,7 @@ Directory Hierarchy: - examples Example code for standalone applications, etc. - include Header Files - lib_arm Files generic to ARM architecture +- lib_avr32 Files generic to AVR32 architecture - lib_generic Files generic to all architectures - lib_i386 Files generic to i386 architecture - lib_m68k Files generic to m68k architecture @@ -256,6 +258,9 @@ The following options need to be configured: ---------------------- CONFIG_NIOS2 + AVR32 based CPUs: + ---------------------- + CONFIG_AT32AP - Board Type: Define exactly one of @@ -325,6 +330,15 @@ The following options need to be configured: CONFIG_PCI5441 CONFIG_PK1C20 CONFIG_EP1C20 CONFIG_EP1S10 CONFIG_EP1S40 + AVR32 based boards: + ------------------- + + CONFIG_ATSTK1000 + +- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) + Define exactly one of + CONFIG_ATSTK1002 + - CPU Module Type: (if CONFIG_COGENT is defined) Define exactly one of @@ -447,6 +461,11 @@ The following options need to be configured: Board code has addition modification that it wants to make to the flat device tree before handing it off to the kernel + CONFIG_OF_BOOT_CPU + + This define fills in the correct boot cpu in the boot + param header, the default value is zero if undefined. + - Serial Ports: CFG_PL010_SERIAL @@ -1509,10 +1528,14 @@ The following options need to be configured: default value of 5 is used. - Command Interpreter: - CFG_AUTO_COMPLETE + CONFIG_AUTO_COMPLETE Enable auto completion of commands using TAB. + Note that this feature has NOT been implemented yet + for the "hush" shell. + + CFG_HUSH_PARSER Define this variable to enable the "hush" shell (from @@ -2385,6 +2408,26 @@ images ready for download to / installation on your system: - "u-boot" is an image in ELF binary format - "u-boot.srec" is in Motorola S-Record format +By default the build is performed locally and the objects are saved +in the source directory. One of the two methods can be used to change +this behavior and build U-Boot to some external directory: + +1. Add O= to the make command line invocations: + + make O=/tmp/build distclean + make O=/tmp/build NAME_config + make O=/tmp/build all + +2. Set environment variable BUILD_DIR to point to the desired location: + + export BUILD_DIR=/tmp/build + make distclean + make NAME_config + make all + +Note that the command line "O=" setting overrides the BUILD_DIR environment +variable. + Please be aware that the Makefiles assume you are using GNU make, so for instance on NetBSD you might need to use "gmake" instead of @@ -2438,6 +2481,22 @@ or to build on a native PowerPC system you can type CROSS_COMPILE=' ' MAKEALL +When using the MAKEALL script, the default behaviour is to build U-Boot +in the source directory. This location can be changed by setting the +BUILD_DIR environment variable. Also, for each target built, the MAKEALL +script saves two log files (<target>.ERR and <target>.MAKEALL) in the +<source dir>/LOG directory. This default location can be changed by +setting the MAKEALL_LOGDIR environment variable. For example: + + export BUILD_DIR=/tmp/build + export MAKEALL_LOGDIR=/tmp/log + CROSS_COMPILE=ppc_8xx- MAKEALL + +With the above settings build objects are saved in the /tmp/build, log +files are saved in the /tmp/log and the source tree remains clean during +the whole build process. + + See also "U-Boot Porting Guide" below. @@ -2748,9 +2807,9 @@ defines the following image properties: 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, LynxOS, pSOS, QNX, RTEMS, ARTOS; Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, ARTOS, LynxOS). -* Target CPU Architecture (Provisions for Alpha, ARM, Intel x86, +* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; - Currently supported: ARM, Intel x86, MIPS, NIOS, PowerPC). + Currently supported: ARM, AVR32, Intel x86, MIPS, NIOS, PowerPC). * Compression Type (uncompressed, gzip, bzip2) * Load Address * Entry Point @@ -3081,6 +3140,55 @@ format!) to the "bootm" command: bash# +Boot Linux and pass a flat device tree: +----------- + +First, U-Boot must be compiled with the appropriate defines. See the section +titled "Linux Kernel Interface" above for a more in depth explanation. The +following is an example of how to start a kernel and pass an updated +flat device tree: + +=> print oftaddr +oftaddr=0x300000 +=> print oft +oft=oftrees/mpc8540ads.dtb +=> tftp $oftaddr $oft +Speed: 1000, full duplex +Using TSEC0 device +TFTP from server 192.168.1.1; our IP address is 192.168.1.101 +Filename 'oftrees/mpc8540ads.dtb'. +Load address: 0x300000 +Loading: # +done +Bytes transferred = 4106 (100a hex) +=> tftp $loadaddr $bootfile +Speed: 1000, full duplex +Using TSEC0 device +TFTP from server 192.168.1.1; our IP address is 192.168.1.2 +Filename 'uImage'. +Load address: 0x200000 +Loading:############ +done +Bytes transferred = 1029407 (fb51f hex) +=> print loadaddr +loadaddr=200000 +=> print oftaddr +oftaddr=0x300000 +=> bootm $loadaddr - $oftaddr +## Booting image at 00200000 ... + Image Name: Linux-2.6.17-dirty + Image Type: PowerPC Linux Kernel Image (gzip compressed) + Data Size: 1029343 Bytes = 1005.2 kB + Load Address: 00000000 + Entry Point: 00000000 + Verifying Checksum ... OK + Uncompressing Kernel Image ... OK +Booting using flat device tree at 0x300000 +Using MPC85xx ADS machine description +Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb +[snip] + + More About U-Boot Image Types: ------------------------------ @@ -3531,12 +3639,19 @@ Coding Standards: ----------------- All contributions to U-Boot should conform to the Linux kernel -coding style; see the file "Documentation/CodingStyle" in your Linux -kernel source directory. - -Please note that U-Boot is implemented in C (and to some small parts -in Assembler); no C++ is used, so please do not use C++ style -comments (//) in your code. +coding style; see the file "Documentation/CodingStyle" and the script +"scripts/Lindent" in your Linux kernel source directory. In sources +originating from U-Boot a style corresponding to "Lindent -pcs" (adding +spaces before parameters to function calls) is actually used. + +Source files originating from a different project (for example the +MTD subsystem) are generally exempt from these guidelines and are not +reformated to ease subsequent migration to newer versions of those +sources. + +Please note that U-Boot is implemented in C (and to some small parts in +Assembler); no C++ is used, so please do not use C++ style comments (//) +in your code. Please also stick to the following formatting rules: - remove any trailing white space |