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diff --git a/doc/README.COBRA5272 b/doc/README.COBRA5272 new file mode 100644 index 0000000..2d3f706 --- /dev/null +++ b/doc/README.COBRA5272 @@ -0,0 +1,156 @@ +File: README.COBRA5272 +Author: Florian Schlote for Sentec elektronik (linux@sentec-elektronik.de) +Contents: This is the README of u-boot (Universal bootloader) for our + COBRA5272 board. +Version: v01.00 +Date: Tue Mar 30 00:28:33 CEST 2004 +License: This document is published under the GNU GPL +______________________________________________________________________ + +CHANGES +040330 v01.00 Creation + +______________________________________________________________________ + + +CONFIGURING +----------- + +1. Modify include/configs/cobra5272.h acc. to your prefs + +2. If necessary, modify board/cobra5272/config.mk (see below) + +3. + +> make cobra5272_config + +> make + + +Please refer to u-boot README (general info, u-boot-x-x-x/README), +to u-boot-x-x-x/doc/README.COBRA5272 and +to the comments in u-boot-x-x-x/include/configs/cobra5272.h + +Configuring u-boot is done by commenting/uncommenting preprocessor defines. + +Default configuration is + + FLASH version (for further info see subsection below) + link address 0xffe00000 + + 16 MB RAM + + network enabled + no default IP address for target, host set, no MACaddress set + + bootdelay for autoboot 5 sec. + autoboot disabled + + +#----------------------------------- +# u-boot FLASH version & RAM version +#----------------------------------- + +The u-boot bootloader for Coldfire processors can be configured + + 1. as a standalone bootloader residing in flash & relocating itself to RAM on + startup automatically => "FLASH version" + + 2. as a RAM version which will not load from flash automatically as it needs a + prestage bootloader ("chainloading") & is running only from the RAM address it + is linked to => "RAM version" + + This version may be very helpful when installing u-boot for the first time + since it can be used to make available s. th. like a "bootstrap + mechanism". + + +How to build the different images: + +------------------------------ +Flash version +------------------------------ + +Compile u-boot + +in dir ./u-boot-x-x-x/ + +please first check: + + in ./include/configs/cobra5272.h + + CONFIG_MONITOR_IS_IN_RAM has to be undefined, e. g. as follows: + + #if 0 + #define CONFIG_MONITOR_IS_IN_RAM + /* define if monitor is started from a pre-loader */ + #endif + + => u-boot as single bootloader starting from flash + + + in board/cobra5272/config.mk TEXT_BASE should be + + TEXT_BASE = 0xffe00000 + + => linking address for u-boot as single bootloader stored in flash + +then: + + host> make cobra5272_config + rm -f include/config.h include/config.mk + Configuring for cobra5272 board... + host> make + [...] + + host> cp u-boot.bin /tftpboot/u-boot_flash.bin + + +------------------------------ +RAM version +------------------------------ + +in dir ./u-boot-x-x-x/ + + host> make distclean + +please modify the settings: + + in ./include/configs/cobra5272.h + + CONFIG_MONITOR_IS_IN_RAM now has to be defined, e. g. as follows: + + #if 1 + #define CONFIG_MONITOR_IS_IN_RAM + /*define if monitor is started from a pre-loader */ + #endif + + => u-boot as RAM version, chainloaded by another bootloader or using bdm cable + + + in board/cobra5272/config.mk TEXT_BASE should be + + TEXT_BASE = 0x00020000 + + => target linking address for RAM + + +then: + + host> make cobra5272_config + rm -f include/config.h include/config.mk + Configuring for cobra5272 board... + host> make + [...] + + host> cp u-boot.bin /tftpboot/u-boot_ram.bin + + +---- +HINT +---- + +If the m68k-elf-toolchain & the m68k-bdm-gdb is installed you can run the RAM +version by typing (in dir ./u-boot-x-x-x/) +"board/cobra5272/bdm/load-cobra_uboot" , +in ./u-boot-x-x-x/ the RAM version u-boot (elf format) has to be available. |