Freescale MPC8315ERDB Board
  -----------------------------------------
  
  1.	Board Switches and Jumpers

  	S3 is used to set CONFIG_SYS_RESET_SOURCE.

  
  	To boot the image at 0xFE000000 in NOR flash, use these DIP

  	switch settings for S3 S4:

  
  	+------+	+------+
  	|      |	| **** |
  	| **** |	|      |
  	+------+ ON	+------+ ON
  	  4321		  4321
  	(where the '*' indicates the position of the tab of the switch.)

  	To boot the image at the beginning of NAND flash, use these
  	DIP switch settings for S3 S4:
  
  	+------+	+------+
  	| *    |	|  *** |
  	|  *** |	| *    |
  	+------+ ON	+------+ ON
  	  4321		  4321
  	(where the '*' indicates the position of the tab of the switch.)
  
  	When booting from NAND, use u-boot-nand.bin, not u-boot.bin.

  2.	Memory Map
  	The memory map looks like this:
  
  	0x0000_0000	0x07ff_ffff	DDR		 128M
  	0x8000_0000	0x8fff_ffff	PCI MEM		 256M
  	0x9000_0000	0x9fff_ffff	PCI_MMIO	 256M
  	0xe000_0000	0xe00f_ffff	IMMR		 1M
  	0xe030_0000	0xe03f_ffff	PCI IO		 1M
  	0xe060_0000	0xe060_7fff	NAND FLASH (CS1) 32K
  	0xfe00_0000	0xfe7f_ffff	NOR FLASH (CS0)	 8M

  	When booting from NAND, NAND flash is CS0 and NOR flash
  	is CS1.

  3.	Definitions
  
  3.1	Explanation of NEW definitions in:
  
  	include/configs/MPC8315ERDB.h
  
  	CONFIG_MPC83xx		MPC83xx family
  	CONFIG_MPC831x		MPC831x specific
  	CONFIG_MPC8315		MPC8315 specific
  	CONFIG_MPC8315ERDB	MPC8315ERDB board specific
  
  4.	Compilation
  
  	Assuming you're using BASH (or similar) as your shell:
  
  	export CROSS_COMPILE=your-cross-compiler-prefix-
  	make distclean

  	make MPC8315ERDB_config (or MPC8315ERDB_NAND_config for u-boot-nand.bin)

  	make all
  
  5.	Downloading and Flashing Images
  
  5.1	Reflash U-boot Image using U-boot

  	NOR flash:

  	tftp 40000 u-boot.bin
  	protect off all
  	erase fe000000 fe1fffff
  
  	cp.b 40000 fe000000 xxxx
  	protect on all
  
  	You have to supply the correct byte count with 'xxxx'
  	from the TFTP result log.

  	NAND flash:
  
  	=>tftpboot $loadaddr <filename>
  	=>nand erase 0 0x80000
  	=>nand write $loadaddr 0 0x80000
  
  	...where 0x80000 is the filesize rounded up to
  	the next 0x20000 increment.

  5.2	Downloading and Booting Linux Kernel
  
  	Ensure that all networking-related environment variables are set
  	properly (including ipaddr, serverip, gatewayip (if needed),
  	netmask, ethaddr, eth1addr, rootpath (if using NFS root),
  	fdtfile, and bootfile).
  
  	Then, do one of the following, depending on whether you
  	want an NFS root or a ramdisk root:
  
  	=>run nfsboot
  	or
  	=>run ramboot
  
  6	Notes

  	The console baudrate for MPC8315ERDB is 115200bps.