[people/ms/u-boot.git] / doc / README.cmi


Summary:
========

This file contains information about the cmi board configuration.
Please see cmi_mpc5xx_config for further details. The cmi board is
a customer specific board but should work with small modifications
on every board which has a MPC5xx and either a 28F128J3A,
28F320J3A or 28F640J3A Intel flash mounted.

Board Discription:
==================

* Motorola MPC555
* RS232 connection
* Intel flash 28F640J3A
* Micron SRAM 1M
* Altera PLD

Bootstrap:
==========

In contrast to the usual boot sequence used in U-Boot, on the
cmi board we don't boot from the external flash directly.
Because of we use a 16-bit flash and don't sample a RCW
from the data bus to set the startup buswidth to 16-bit.
Unfortunatly the default width, sampled from the default RCW
is 32-bit. For this reason we burn the proper RCW into the
internal flash shadow location and boot after power-on or
reset from the internal flash and then branch to 0x02000100
where the U-Boot reset vector handler is located.

Memory Map:
===========

Memory Map after relocation:

    0x0000 0000		CONFIG_SYS_SDRAM_BASE
	  :
    0x000F 9FFF
	  :
	  :
    0x0100 0000		CONFIG_SYS_IMMR (Internal memory map base adress)
	  :
    0x0130 7FFF
	  :
	  :
    0x0200 0000		CONFIG_SYS_FLASH_BASE
	  :
    0x027C FFFF
	  :
	  :
    0x0300 0000		PLD_BASE

Flash Partition:

    0x0200 0000		Block 0 and 1 contain U-Boot except
	  :		environment
	  :
    0x0201 FFFF
    0x0202 0000		Block 2 contains environment (.ppcenv)
	  :
    0x0202 FFFF

See README file for futher information about U-Boot relocation
and partitioning.

Tested Features:
================

* U-Boot commands: go, loads, loadb, all memory features, printenv,
  setenv, saveenv, protect, erase, fli, bdi, mtest, reset, version,
  coninfo, help (see configuration file for available commands)

* Blinking led to indicate boot process

Added or Changed Files:
=======================

u-boot-0.2.0/board/cmi/*
u-boot-0.2.0/include/configs/cmi_mpc5xx.h

Regards,
Martin
Commit	Line	Data
0db5bca8 WD	1
	2	Summary:
	3	========
	4
	5	This file contains information about the cmi board configuration.
8bde7f77 WD	6	Please see cmi_mpc5xx_config for further details. The cmi board is
	7	a customer specific board but should work with small modifications
	8	on every board which has a MPC5xx and either a 28F128J3A,
0db5bca8 WD	9	28F320J3A or 28F640J3A Intel flash mounted.
	10
	11	Board Discription:
	12	==================
	13
	14	* Motorola MPC555
	15	* RS232 connection
	16	* Intel flash 28F640J3A
	17	* Micron SRAM 1M
	18	* Altera PLD
8bde7f77	19
0db5bca8 WD	20	Bootstrap:
	21	==========
	22
	23	In contrast to the usual boot sequence used in U-Boot, on the
	24	cmi board we don't boot from the external flash directly.
	25	Because of we use a 16-bit flash and don't sample a RCW
8bde7f77	26	from the data bus to set the startup buswidth to 16-bit.
0db5bca8 WD	27	Unfortunatly the default width, sampled from the default RCW
	28	is 32-bit. For this reason we burn the proper RCW into the
	29	internal flash shadow location and boot after power-on or
	30	reset from the internal flash and then branch to 0x02000100
	31	where the U-Boot reset vector handler is located.
	32
	33	Memory Map:
	34	===========
	35
	36	Memory Map after relocation:
	37
6d0f6bcf	38	0x0000 0000 CONFIG_SYS_SDRAM_BASE
0db5bca8 WD	39	:
	40	0x000F 9FFF
	41	:
8bde7f77	42	:
6d0f6bcf	43	0x0100 0000 CONFIG_SYS_IMMR (Internal memory map base adress)
0db5bca8 WD	44	:
	45	0x0130 7FFF
	46	:
8bde7f77	47	:
6d0f6bcf	48	0x0200 0000 CONFIG_SYS_FLASH_BASE
0db5bca8 WD	49	:
	50	0x027C FFFF
	51	:
	52	:
	53	0x0300 0000 PLD_BASE
	54
	55	Flash Partition:
8bde7f77 WD	56
8bde7f77 WD	57	0x0200 0000 Block 0 and 1 contain U-Boot except
0db5bca8 WD	58	: environment
	59	:
	60	0x0201 FFFF
	61	0x0202 0000 Block 2 contains environment (.ppcenv)
	62	:
8bde7f77 WD	63	0x0202 FFFF
8bde7f77 WD	64
0db5bca8 WD	65	See README file for futher information about U-Boot relocation
	66	and partitioning.
	67
	68	Tested Features:
	69	================
	70
	71	* U-Boot commands: go, loads, loadb, all memory features, printenv,
	72	setenv, saveenv, protect, erase, fli, bdi, mtest, reset, version,
	73	coninfo, help (see configuration file for available commands)
8bde7f77	74
0db5bca8 WD	75	* Blinking led to indicate boot process
	76
	77	Added or Changed Files:
	78	=======================
	79
	80	u-boot-0.2.0/board/cmi/*
	81	u-boot-0.2.0/include/configs/cmi_mpc5xx.h
	82
	83	Regards,
	84	Martin