1. Board Switches and Jumpers
- S3 is used to set CFG_RESET_SOURCE.
+ S3 is used to set CONFIG_SYS_RESET_SOURCE.
To boot the image at 0xFE000000 in NOR flash, use these DIP
- switche settings for S3 S4:
+ switch settings for S3 S4:
+------+ +------+
| | | **** |
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:
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:
export CROSS_COMPILE=your-cross-compiler-prefix-
make distclean
- make MPC8315ERDB_config
+ 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
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
6 Notes
- Booting from NAND flash is not yet supported.
The console baudrate for MPC8315ERDB is 115200bps.