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[kvmfornfv.git] / qemu / roms / u-boot / board / freescale / mpc8315erdb / README

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+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.