This directory contains board specific code for a generic MPC860T basedembedded computer, called 'GEN860T'.  The design is generic in the sense thatcommon, readily available components are used and that the architecture of thesystem is relatively straightforward:	One eight bit wide boot (FLASH) memory	32 bit main memory using SDRAM	DOC 2000+	Ethernet PHY	Some I2C peripheral devices: Atmel AT24C256 EEPROM, Maxim DS1337 RTC.	Some other miscellaneous peripheralsNOTE: There are references to a XIlinx FPGA and Mil-Std 1553 databus in thisport.  I guess the computer is not as generic as I first said 8)  However,these extras can be safely ignored.Given the GEN860T files, it should be pretty easy to reverse engineer thehardware configuration, if that's useful to you.  Hopefully, this code willbe useful to someone as a basis for a port to a new system or as a head starton a custom design.  If you end up using any of this, I would appreciatehearing from you, especially if you discover bugs or find ways to improve thequality of this U-Boot port.Here are the salient features of the system:Clock						:	33.3 Mhz oscillatorProcessor core frequency	:	66.6 Mhz  if in 1:2:1 mode; can also run 1:1Bus frequency				:	33.3 MhzMain memory:	Type	: SDRAM	Width	: 32 bits	Size	: 64 mibibytes	Chip	: Two Micron MT48LC16M16A2TG-7E	CS		: MPC860T CS1*/UPMA	UPMA CONNECTIONS:		SDRAM A10	: GPLA0*		SDRAM CAS*	: GPLA2*		SDRAM WE*	: GPLA3*		SDRAM RAS*	: GPLA4*Boot memory:	Type	: FLASH	Width	: 8 bits	Size	: 16 mibibytes	Chip	: One Intel 28F128J3A (StrataFlash)	CS		: MPC860T CS0*/GPCM (this is the "boot" chip select)EEPROM memory:	Type	: Serial I2C EEPROM	Width	: 8 bits	Size	: 32 kibibytes	Chip	: One Atmel AT25C256	CS		: 0x50 (external I2C address pins on device are tied to GND)Filesystem memory:	Type	: NAND FLASH (Toshiba)	Width	: 8 bits (i.e. interface to DOC is 8 bits)	Size	: 32 mibibytes	Chip	: One DiskOnCHip Millenium Plus (DOC 2000+)	CS		: MPC860T CS2*/GPCMNetwork support:	MAC		: MPC86OT FEC (Fast Ethernet Controller)	PHY		: Intel LXT971A	MII Addr: 0x0 (hardwired on the board)	MII IRQ	:Console:	RS-232 on SMC1 (Maxim MAX3232 LVCMOS-RS232 level shifter)Real Time Clock:	Type	: Low power, I2C interface	Chip	: Maxim DS1337	CS		: Address 0x68 on I2C bus	The MPC860T's internal RTC has a defect in Mask rev D that increases	the current drain on the KAPWR line to 10 mA.  Since this is an	unreasonable amount of current draw for a RTC, and Motorola does not	plan to fix this in future mask revisions, a serial (I2C) RTC that	works has been included instead.  NOTE that the DS1337 can be	configured to output a 32768 Hz clock while the main power is on.	This clock output has been routed to the MPC860T's EXTAL pin to allow	the internal RTC to be used.  NOTE also that due to yet another	defect in the rev D mask, the RTC does not operate reliably when the	internal RTC divisor is set to use a 32768 Hz reference.  So just use	the I2C RTC.Miscellaneous:	Xilinx Virtex FPGA on CS3*/GPCM.	Virtex FPGA slave SelectMap interface on cs4*/UPMB.	Mil-Std 1553 databus interface on CS5*/GPCM.	Audio sounder (beeper) with digital volume control connected to SPKROUT.SC variant:	A reduced-feature version of the GEN860T port is also supported: GEN860T_SC.	The 'SC' variant only provides support for the Virtex FPGA, SDRAM main	memory, EEPROM and flash memory.  The system clock frequency is reduced	to 24 MHz.Issues:	The DOC 2000+ returns 0x40 as its device ID when probed using the method	desxribed in the DOC datasheet.  Unfortunately, the U-Boot DOC driver	does not recognize this device.  As of this writing, it seems that MTD	does not support the DOC 2000+ either.Status:	Everything appears to work except DOC support. As of this writing,	David Woodhouse has stated on the MTD mailing list that he has no	knowledge of the DOC Millineum Plus and therfore there is no support	in MTD for this device.  I wish I had known this sooner :(The GEN860T board specific files and configuration is based on the workof others who have contributed to U-Boot. The copyright and license noticesof these authors have been retained wherever their code has been reused.All new code to support the GEN860T board is:	(C) Copyright 2001-2003	Keith Outwater (keith_outwater@mvis.com)and the following license applies:This program is free software; you can redistribute it and/ormodify it under the terms of the GNU General Public License aspublished by the Free Software Foundation; either version 2 ofthe License, or (at your option) any later version.This program is distributed in the hope that it will be useful,WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place, Suite 330, Boston,MA 02111-1307 USAThanks to Wolfgang Denk for a great software package and to everyonewho contributed to its development.Keith OutwaterSr. Staff EngineerMicrovision, Inc.<keith_outwater@mvis.com><outwater@eskimo.com>vim: set ts=4 sw=4 tw=78: