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Diffstat (limited to 'qemu/roms/u-boot/board/freescale/mpc8313erdb/README')
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diff --git a/qemu/roms/u-boot/board/freescale/mpc8313erdb/README b/qemu/roms/u-boot/board/freescale/mpc8313erdb/README new file mode 100644 index 000000000..be7ef32b4 --- /dev/null +++ b/qemu/roms/u-boot/board/freescale/mpc8313erdb/README @@ -0,0 +1,111 @@ +Freescale MPC8313ERDB 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 + 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 + + When booting from NAND, NAND flash is CS0 and NOR flash + is CS1. + +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_XXX_config + (where XXX is: + 33 - 33 MHz oscillator, boot from NOR flash + 66 - 66 MHz oscillator, boot from NOR flash + NAND_33 - 33 MHz oscillator, boot from NAND flash + NAND_66 - 66 MHz oscillator, boot from NAND flash) + make + +5. Downloading and Flashing Images + +5.1 Reflash U-boot Image using U-boot + + NOR flash: + + =>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. + + 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 MPC8313ERDB is 115200bps. |