mpc83xx: Add MPC8313ERDB support.
Signed-off-by: Scott Wood <scottwood@freescale.com>
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+Freescale MPC8313ERDB Board
+-----------------------------------------
+
+1. Board Switches and Jumpers
+
+ SW3 is used to set CFG_RESET_SOURCE.
+
+ To boot the image at 0xFE000000 in NOR flash, use these DIP
+ switche settings for SW3 SW4:
+
+ +------+ +------+
+ | | | **** |
+ | **** | | |
+ +------+ ON +------+ ON
+ 4321 4321
+ (where the '*' indicates the position of the tab of the switch.)
+
+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
+ 0xe200_0000 0xe20f_ffff PCI IO 16M
+ 0xe280_0000 0xe280_7fff NAND FLASH (CS1) 32K
+ 0xf000_0000 0xf001_ffff VSC7385 (CS2) 128K
+ 0xfa00_0000 0xfa00_7fff Board Status/ 32K
+ LED Control (CS3)
+ 0xfe00_0000 0xfe7f_ffff NOR FLASH (CS0) 8M
+
+3. Definitions
+
+3.1 Explanation of NEW definitions in:
+
+ include/configs/MPC8313ERDB.h
+
+ CONFIG_MPC83xx MPC83xx family
+ CONFIG_MPC831x MPC831x specific
+ CONFIG_MPC8313ERDB MPC8313ERDB board specific
+
+4. Compilation
+
+ Assuming you're using BASH (or similar) as your shell:
+
+ export CROSS_COMPILE=your-cross-compiler-prefix-
+ make distclean
+ make MPC8313ERDB_33_config
+ (or make MPC8313ERDB_66_config, depending on the speed of
+ the oscillator on your board)
+ make
+
+5. Downloading and Flashing Images
+
+5.1 Reflash U-boot Image using U-boot
+
+ =>run tftpflash
+
+ You may want to try
+ =>tftpboot $loadaddr $uboot
+ first, to make sure that the TFTP load will succeed before it
+ goes ahead and wipes out your current firmware. And of course,
+ have an alternate means of programming the flash available
+ if the new u-boot doesn't boot.
+
+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
+
+ Booting from NAND flash is not yet supported.
+ The console baudrate for MPC8313ERDB is 115200bps.