mirror of
https://github.com/AsahiLinux/u-boot
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84 lines
2 KiB
Text
84 lines
2 KiB
Text
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Summary:
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========
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This file contains information about the cmi board configuration.
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Please see cmi_mpc5xx_config for further details. The cmi board is
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a customer specific board but should work with small modifications
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on every board which has a MPC5xx and either a 28F128J3A,
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28F320J3A or 28F640J3A Intel flash mounted.
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Board Discription:
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==================
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* Motorola MPC555
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* RS232 connection
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* Intel flash 28F640J3A
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* Micron SRAM 1M
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* Altera PLD
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Bootstrap:
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==========
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In contrast to the usual boot sequence used in U-Boot, on the
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cmi board we don't boot from the external flash directly.
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Because of we use a 16-bit flash and don't sample a RCW
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from the data bus to set the startup buswidth to 16-bit.
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Unfortunatly the default width, sampled from the default RCW
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is 32-bit. For this reason we burn the proper RCW into the
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internal flash shadow location and boot after power-on or
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reset from the internal flash and then branch to 0x02000100
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where the U-Boot reset vector handler is located.
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Memory Map:
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===========
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Memory Map after relocation:
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0x0000 0000 CONFIG_SYS_SDRAM_BASE
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:
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0x000F 9FFF
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:
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:
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0x0100 0000 CONFIG_SYS_IMMR (Internal memory map base adress)
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:
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0x0130 7FFF
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:
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:
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0x0200 0000 CONFIG_SYS_FLASH_BASE
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:
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0x027C FFFF
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:
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:
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0x0300 0000 PLD_BASE
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Flash Partition:
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0x0200 0000 Block 0 and 1 contain U-Boot except
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: environment
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:
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0x0201 FFFF
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0x0202 0000 Block 2 contains environment (.ppcenv)
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:
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0x0202 FFFF
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See README file for futher information about U-Boot relocation
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and partitioning.
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Tested Features:
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================
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* U-Boot commands: go, loads, loadb, all memory features, printenv,
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setenv, saveenv, protect, erase, fli, bdi, mtest, reset, version,
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coninfo, help (see configuration file for available commands)
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* Blinking led to indicate boot process
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Added or Changed Files:
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=======================
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u-boot-0.2.0/board/cmi/*
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u-boot-0.2.0/include/configs/cmi_mpc5xx.h
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Regards,
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Martin
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