| 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. |