| wdenk | 359733b | 2003-03-31 17:27:09 +0000 | [diff] [blame] | 1 | |
| 2 | Summary: |
| 3 | ======== |
| 4 | |
| 5 | This file contains information about the cmi board configuration. |
| 6 | Please see cmi_mpc5xx_config for further details. The cmi board is |
| 7 | a customer specific board but should work with small modifications |
| 8 | on every board which has a MPC5xx and either a 28F128J3A, |
| 9 | 28F320J3A or 28F640J3A Intel flash mounted. |
| 10 | |
| 11 | Board Discription: |
| 12 | ================== |
| 13 | |
| 14 | * Motorola MPC555 |
| 15 | * RS232 connection |
| 16 | * Intel flash 28F640J3A |
| 17 | * Micron SRAM 1M |
| 18 | * Altera PLD |
| 19 | |
| 20 | Bootstrap: |
| 21 | ========== |
| 22 | |
| 23 | In contrast to the usual boot sequence used in U-Boot, on the |
| 24 | cmi board we don't boot from the external flash directly. |
| 25 | Because of we use a 16-bit flash and don't sample a RCW |
| 26 | from the data bus to set the startup buswidth to 16-bit. |
| 27 | Unfortunatly the default width, sampled from the default RCW |
| 28 | is 32-bit. For this reason we burn the proper RCW into the |
| 29 | internal flash shadow location and boot after power-on or |
| 30 | reset from the internal flash and then branch to 0x02000100 |
| 31 | where the U-Boot reset vector handler is located. |
| 32 | |
| 33 | Memory Map: |
| 34 | =========== |
| 35 | |
| 36 | Memory Map after relocation: |
| 37 | |
| 38 | 0x0000 0000 CFG_SDRAM_BASE |
| 39 | : |
| 40 | 0x000F 9FFF |
| 41 | : |
| 42 | : |
| 43 | 0x0100 0000 CFG_IMMR (Internal memory map base adress) |
| 44 | : |
| 45 | 0x0130 7FFF |
| 46 | : |
| 47 | : |
| 48 | 0x0200 0000 CFG_FLASH_BASE |
| 49 | : |
| 50 | 0x027C FFFF |
| 51 | : |
| 52 | : |
| 53 | 0x0300 0000 PLD_BASE |
| 54 | |
| 55 | Flash Partition: |
| 56 | |
| 57 | 0x0200 0000 Block 0 and 1 contain U-Boot except |
| 58 | : environment |
| 59 | : |
| 60 | 0x0201 FFFF |
| 61 | 0x0202 0000 Block 2 contains environment (.ppcenv) |
| 62 | : |
| 63 | 0x0202 FFFF |
| 64 | |
| 65 | See README file for futher information about U-Boot relocation |
| 66 | and partitioning. |
| 67 | |
| 68 | Tested Features: |
| 69 | ================ |
| 70 | |
| 71 | * U-Boot commands: go, loads, loadb, all memory features, printenv, |
| 72 | setenv, saveenv, protect, erase, fli, bdi, mtest, reset, version, |
| 73 | coninfo, help (see configuration file for available commands) |
| 74 | |
| 75 | * Blinking led to indicate boot process |
| 76 | |
| 77 | Added or Changed Files: |
| 78 | ======================= |
| 79 | |
| 80 | u-boot-0.2.0/board/cmi/* |
| 81 | u-boot-0.2.0/include/configs/cmi_mpc5xx.h |
| 82 | |
| 83 | Regards, |
| 84 | Martin |