2 Author: Florian Schlote for Sentec elektronik (linux@sentec-elektronik.de)
3 Contents: This is the README of u-boot (Universal bootloader) for our
6 Date: Tue Mar 30 00:28:33 CEST 2004
7 License: This document is published under the GNU GPL
8 ______________________________________________________________________
11 040330 v01.00 Creation
13 ______________________________________________________________________
19 1. Modify include/configs/cobra5272.h acc. to your prefs
21 2. If necessary, modify board/cobra5272/config.mk (see below)
25 > make cobra5272_config
30 Please refer to u-boot README (general info, u-boot-x-x-x/README),
31 to u-boot-x-x-x/doc/README.COBRA5272 and
32 to the comments in u-boot-x-x-x/include/configs/cobra5272.h
34 Configuring u-boot is done by commenting/uncommenting preprocessor defines.
36 Default configuration is
38 FLASH version (for further info see subsection below)
39 link address 0xffe00000
44 no default IP address for target, host set, no MACaddress set
46 bootdelay for autoboot 5 sec.
50 #-----------------------------------
51 # u-boot FLASH version & RAM version
52 #-----------------------------------
54 The u-boot bootloader for Coldfire processors can be configured
56 1. as a standalone bootloader residing in flash & relocating itself to RAM on
57 startup automatically => "FLASH version"
59 2. as a RAM version which will not load from flash automatically as it needs a
60 prestage bootloader ("chainloading") & is running only from the RAM address it
61 is linked to => "RAM version"
63 This version may be very helpful when installing u-boot for the first time
64 since it can be used to make available s. th. like a "bootstrap
68 How to build the different images:
70 ------------------------------
72 ------------------------------
76 in dir ./u-boot-x-x-x/
80 in ./include/configs/cobra5272.h
82 CONFIG_MONITOR_IS_IN_RAM has to be undefined, e. g. as follows:
85 #define CONFIG_MONITOR_IS_IN_RAM
86 /* define if monitor is started from a pre-loader */
89 => u-boot as single bootloader starting from flash
92 in board/cobra5272/config.mk CONFIG_SYS_TEXT_BASE should be
94 CONFIG_SYS_TEXT_BASE = 0xffe00000
96 => linking address for u-boot as single bootloader stored in flash
100 host> make cobra5272_config
101 rm -f include/config.h include/config.mk
102 Configuring for cobra5272 board...
106 host> cp u-boot.bin /tftpboot/u-boot_flash.bin
109 ------------------------------
111 ------------------------------
113 in dir ./u-boot-x-x-x/
117 please modify the settings:
119 in ./include/configs/cobra5272.h
121 CONFIG_MONITOR_IS_IN_RAM now has to be defined, e. g. as follows:
124 #define CONFIG_MONITOR_IS_IN_RAM
125 /*define if monitor is started from a pre-loader */
128 => u-boot as RAM version, chainloaded by another bootloader or using bdm cable
131 in board/cobra5272/config.mk CONFIG_SYS_TEXT_BASE should be
133 CONFIG_SYS_TEXT_BASE = 0x00020000
135 => target linking address for RAM
140 host> make cobra5272_config
141 rm -f include/config.h include/config.mk
142 Configuring for cobra5272 board...
146 host> cp u-boot.bin /tftpboot/u-boot_ram.bin
153 If the m68k-elf-toolchain & the m68k-bdm-gdb is installed you can run the RAM
154 version by typing (in dir ./u-boot-x-x-x/)
155 "board/cobra5272/bdm/load-cobra_uboot" ,
156 in ./u-boot-x-x-x/ the RAM version u-boot (elf format) has to be available.