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1 | File: README.COBRA5272 |
| 2 | Author: Florian Schlote for Sentec elektronik (linux@sentec-elektronik.de) | |
| 3 | Contents: This is the README of u-boot (Universal bootloader) for our | |
| 4 | COBRA5272 board. | |
| 5 | Version: v01.00 | |
| 6 | Date: Tue Mar 30 00:28:33 CEST 2004 | |
| 7 | License: This document is published under the GNU GPL | |
| 8 | ______________________________________________________________________ | |
| 9 | ||
| 10 | CHANGES | |
| 11 | 040330 v01.00 Creation | |
| 12 | ||
| 13 | ______________________________________________________________________ | |
| 14 | ||
| 15 | ||
| 16 | CONFIGURING | |
| 17 | ----------- | |
| 18 | ||
| 19 | 1. Modify include/configs/cobra5272.h acc. to your prefs | |
| 20 | ||
| 21 | 2. If necessary, modify board/cobra5272/config.mk (see below) | |
| 22 | ||
| 23 | 3. | |
| 24 | ||
| 25 | > make cobra5272_config | |
| 26 | ||
| 27 | > make | |
| 28 | ||
| 29 | ||
| 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 | |
| 33 | ||
| 34 | Configuring u-boot is done by commenting/uncommenting preprocessor defines. | |
| 35 | ||
| 36 | Default configuration is | |
| 37 | ||
| 38 | FLASH version (for further info see subsection below) | |
| 39 | link address 0xffe00000 | |
| 40 | ||
| 41 | 16 MB RAM | |
| 42 | ||
| 43 | network enabled | |
| 44 | no default IP address for target, host set, no MACaddress set | |
| 45 | ||
| 46 | bootdelay for autoboot 5 sec. | |
| 47 | autoboot disabled | |
| 48 | ||
| 49 | ||
| 50 | #----------------------------------- | |
| 51 | # u-boot FLASH version & RAM version | |
| 52 | #----------------------------------- | |
| 53 | ||
| 54 | The u-boot bootloader for Coldfire processors can be configured | |
| 55 | ||
| 56 | 1. as a standalone bootloader residing in flash & relocating itself to RAM on | |
| 57 | startup automatically => "FLASH version" | |
| 58 | ||
| 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" | |
| 62 | ||
| 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 | |
| 65 | mechanism". | |
| 66 | ||
| 67 | ||
| 68 | How to build the different images: | |
| 69 | ||
| 70 | ------------------------------ | |
| 71 | Flash version | |
| 72 | ------------------------------ | |
| 73 | ||
| 74 | Compile u-boot | |
| 75 | ||
| 76 | in dir ./u-boot-x-x-x/ | |
| 77 | ||
| 78 | please first check: | |
| 79 | ||
| 80 | in ./include/configs/cobra5272.h | |
| 81 | ||
| 82 | CONFIG_MONITOR_IS_IN_RAM has to be undefined, e. g. as follows: | |
| 83 | ||
| 84 | #if 0 | |
| 85 | #define CONFIG_MONITOR_IS_IN_RAM | |
| 86 | /* define if monitor is started from a pre-loader */ | |
| 87 | #endif | |
| 88 | ||
| 89 | => u-boot as single bootloader starting from flash | |
| 90 | ||
| 91 | ||
| 14d0a02a | 92 | in board/cobra5272/config.mk CONFIG_SYS_TEXT_BASE should be |
| a562e1bd | 93 | |
| 14d0a02a | 94 | CONFIG_SYS_TEXT_BASE = 0xffe00000 |
| a562e1bd WD |
95 | |
| 96 | => linking address for u-boot as single bootloader stored in flash | |
| 97 | ||
| 98 | then: | |
| 99 | ||
| 100 | host> make cobra5272_config | |
| 101 | rm -f include/config.h include/config.mk | |
| 102 | Configuring for cobra5272 board... | |
| 103 | host> make | |
| 104 | [...] | |
| 105 | ||
| 106 | host> cp u-boot.bin /tftpboot/u-boot_flash.bin | |
| 107 | ||
| 108 | ||
| 109 | ------------------------------ | |
| 110 | RAM version | |
| 111 | ------------------------------ | |
| 112 | ||
| 113 | in dir ./u-boot-x-x-x/ | |
| 114 | ||
| 115 | host> make distclean | |
| 116 | ||
| 117 | please modify the settings: | |
| 118 | ||
| 119 | in ./include/configs/cobra5272.h | |
| 120 | ||
| 121 | CONFIG_MONITOR_IS_IN_RAM now has to be defined, e. g. as follows: | |
| 122 | ||
| 123 | #if 1 | |
| 124 | #define CONFIG_MONITOR_IS_IN_RAM | |
| 125 | /*define if monitor is started from a pre-loader */ | |
| 126 | #endif | |
| 127 | ||
| 128 | => u-boot as RAM version, chainloaded by another bootloader or using bdm cable | |
| 129 | ||
| 130 | ||
| 14d0a02a | 131 | in board/cobra5272/config.mk CONFIG_SYS_TEXT_BASE should be |
| a562e1bd | 132 | |
| 14d0a02a | 133 | CONFIG_SYS_TEXT_BASE = 0x00020000 |
| a562e1bd WD |
134 | |
| 135 | => target linking address for RAM | |
| 136 | ||
| 137 | ||
| 138 | then: | |
| 139 | ||
| 140 | host> make cobra5272_config | |
| 141 | rm -f include/config.h include/config.mk | |
| 142 | Configuring for cobra5272 board... | |
| 143 | host> make | |
| 144 | [...] | |
| 145 | ||
| 146 | host> cp u-boot.bin /tftpboot/u-boot_ram.bin | |
| 147 | ||
| 148 | ||
| 149 | ---- | |
| 150 | HINT | |
| 151 | ---- | |
| 152 | ||
| 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. |