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README

      1 Freescale MPC8315ERDB Board
      2 -----------------------------------------
      3 
      4 1.	Board Switches and Jumpers
      5 
      6 	S3 is used to set CONFIG_SYS_RESET_SOURCE.
      7 
      8 	To boot the image at 0xFE000000 in NOR flash, use these DIP
      9 	switch settings for S3 S4:
     10 
     11 	+------+	+------+
     12 	|      |	| **** |
     13 	| **** |	|      |
     14 	+------+ ON	+------+ ON
     15 	  4321		  4321
     16 	(where the '*' indicates the position of the tab of the switch.)
     17 
     18 	To boot the image at the beginning of NAND flash, use these
     19 	DIP switch settings for S3 S4:
     20 
     21 	+------+	+------+
     22 	| *    |	|  *** |
     23 	|  *** |	| *    |
     24 	+------+ ON	+------+ ON
     25 	  4321		  4321
     26 	(where the '*' indicates the position of the tab of the switch.)
     27 
     28 	When booting from NAND, use u-boot-nand.bin, not u-boot.bin.
     29 
     30 2.	Memory Map
     31 	The memory map looks like this:
     32 
     33 	0x0000_0000	0x07ff_ffff	DDR		 128M
     34 	0x8000_0000	0x8fff_ffff	PCI MEM		 256M
     35 	0x9000_0000	0x9fff_ffff	PCI_MMIO	 256M
     36 	0xe000_0000	0xe00f_ffff	IMMR		 1M
     37 	0xe030_0000	0xe03f_ffff	PCI IO		 1M
     38 	0xe060_0000	0xe060_7fff	NAND FLASH (CS1) 32K
     39 	0xfe00_0000	0xfe7f_ffff	NOR FLASH (CS0)	 8M
     40 
     41 	When booting from NAND, NAND flash is CS0 and NOR flash
     42 	is CS1.
     43 
     44 3.	Definitions
     45 
     46 3.1	Explanation of NEW definitions in:
     47 
     48 	include/configs/MPC8315ERDB.h
     49 
     50 	CONFIG_MPC83xx		MPC83xx family
     51 	CONFIG_MPC831x		MPC831x specific
     52 	CONFIG_MPC8315		MPC8315 specific
     53 	CONFIG_MPC8315ERDB	MPC8315ERDB board specific
     54 
     55 4.	Compilation
     56 
     57 	Assuming you're using BASH (or similar) as your shell:
     58 
     59 	export CROSS_COMPILE=your-cross-compiler-prefix-
     60 	make distclean
     61 	make MPC8315ERDB_config (or MPC8315ERDB_NAND_config for u-boot-nand.bin)
     62 	make all
     63 
     64 5.	Downloading and Flashing Images
     65 
     66 5.1	Reflash U-Boot Image using U-Boot
     67 
     68 	NOR flash:
     69 
     70 	tftp 40000 u-boot.bin
     71 	protect off all
     72 	erase fe000000 fe1fffff
     73 
     74 	cp.b 40000 fe000000 xxxx
     75 	protect on all
     76 
     77 	You have to supply the correct byte count with 'xxxx'
     78 	from the TFTP result log.
     79 
     80 	NAND flash:
     81 
     82 	=>tftpboot $loadaddr <filename>
     83 	=>nand erase 0 0x80000
     84 	=>nand write $loadaddr 0 0x80000
     85 
     86 	...where 0x80000 is the filesize rounded up to
     87 	the next 0x20000 increment.
     88 
     89 5.2	Downloading and Booting Linux Kernel
     90 
     91 	Ensure that all networking-related environment variables are set
     92 	properly (including ipaddr, serverip, gatewayip (if needed),
     93 	netmask, ethaddr, eth1addr, rootpath (if using NFS root),
     94 	fdtfile, and bootfile).
     95 
     96 	Then, do one of the following, depending on whether you
     97 	want an NFS root or a ramdisk root:
     98 
     99 	=>run nfsboot
    100 	or
    101 	=>run ramboot
    102 
    103 6	Notes
    104 
    105 	The console baudrate for MPC8315ERDB is 115200bps.
    106