uboot-BF535-EZ_Kit-beta3.0 Porting Document
--------------------------------------------

PACKAGE VERSION : uboot-BF535-EZ_Kit-beta-3.0

DATE            : February 11, 2004 

Developer       : ganapathi@isofttech.com


u-boot-1.0.0 is ported to Blackfin 535 processor (ADSP-BF535-EZ_Kit).
This document describes the changes done as part of porting.


Development Environment
-----------------------
Cross compiler	: nisa-elf
                  gcc:  nisa-elf-gcc-2.95.3-9.i386.rpm (version 2.95.3)
                  binutils: nisa-elf-binutils-2.9-6.i386.rpm (version 2.9)
Host system  	: i386
Target system	: blackfin
Host platform  	: Red Hat Linux
Target board	: ezkit


Changes done to the u-boot framework
------------------------------------

config.mk, Makefile - Addition of cross compiler details and board configuration tag.

common/Makefile
common/cmd_bootm.c  - Addition of check frionommu architecture.	
common/main.c	    - Added one more case to check the NULL character 
		      returned by the serial port.
common/cmd_net.c    - Commentted the environmet save code. because that feature is not implemeted.

include/image.h      - Added a macro for blackfin architecture
include/status_led.h - Added to check for the blackfin related status 
		       LED details
include/net.h        - Changed prototypes of the network functions to support SMC driver

lib_generic/Makefile 

drivers/smc91111.c - Ported for the blackfin processor.

net/eth.c	   - SMC driver support added.

net/tftp.c	   - Commented unwanted	print inside tftpstart routine.


Additions done to the u-boot framework
--------------------------------------

cpu/bf535	- Blackfin processor specific files.
board/ezkit	- EZ-Kit board specific files.
                  The framework is taken from TQM8260. 

lib_frionommu	- FRIONOMMU architecture specific files. 
                  The framework for this taken from lib_mips/directory. 
		
include/asm-frionommu - Header file related to the frionommu architechture . 

include/blkfinserial.h	- Blackfin UART register definitions
include/config.h	- wrapper file for the board definitions 
include/config.mk	- config file Make	
include/configs/bf535.h	- EzKit board definitions
include/def_bf535.h	- register definitions for the blackfin
include/def_blackfin.h	- definitions for the blackfin
include/linux/linkage.h	- asmlinkage details for the assembly
include/linux/sys.h	- system related definitions like access modes stats

lib_generic/memcpy.c    - implementation for memcpy() function
lib_generic/memcmp.c    - implementation for memcmp() function
lib_generic/memset.c	- implementation for memset() function



Installation and Execution Sequence
-----------------------------------
1. untar the source 

2. Run the following command from the base directory. 

	make clean; make mrproper; make bf535_config; make

3. The output file u-boot.hex will be generated. And also u-boot.bin file
   generated to upgrade the u-boot through the u-boot.	

4. Load u-boot.hex file into flash using the visualDSP flashprogrammer.