Blame view
board/dbau1x00/README
1.88 KB
4cfaf55e5
|
1 |
By Thomas.Lange@corelatus.se 2004-Oct-05 |
5da627a42
|
2 |
---------------------------------------- |
4cfaf55e5
|
3 4 5 |
DbAu1xx0 are development boards from AMD containing an Alchemy AU1xx0 series cpu with mips32 core. Existing cpu:s are Au1000, Au1100, Au1500 and Au1550 |
5da627a42
|
6 7 8 |
Limitations & comments ---------------------- |
4cfaf55e5
|
9 10 11 |
Support was originally big endian only. I have not tested, but several u-boot users report working configurations in little endian mode. |
5da627a42
|
12 13 14 |
I named the board dbau1x00, to allow support for all three development boards |
4cfaf55e5
|
15 |
( dbau1000, dbau1100 and dbau1500 ). |
8b74bf31f
|
16 |
Now there is a new board called dbau1550 also, which |
4cfaf55e5
|
17 |
should be supported RSN. |
5da627a42
|
18 |
|
4cfaf55e5
|
19 20 |
I only have a dbau1000, so my testing is limited to this board. |
5da627a42
|
21 22 23 24 |
The board has two different flash banks, that can be selected via dip switch. This makes it possible to test new bootloaders without thrashing the YAMON |
4cfaf55e5
|
25 26 27 |
boot loader delivered with board. NOTE! When you switch between the two boot flashes, the |
8b74bf31f
|
28 |
base addresses will be swapped. |
14d0a02a1
|
29 |
Have this in mind when you compile u-boot. CONFIG_SYS_TEXT_BASE has |
8b74bf31f
|
30 31 |
to match the address where u-boot is located when you actually launch. |
5da627a42
|
32 33 |
Ethernet only supported for mac0. |
4cfaf55e5
|
34 |
PCMCIA only supported for slot 0, only 3.3V. |
5da627a42
|
35 |
|
4cfaf55e5
|
36 |
PCMCIA IDE tested with Sandisk Compact Flash and |
5da627a42
|
37 38 39 40 41 42 43 |
IBM microdrive. ################################### ######## NOTE!!!!!! ######### ################################### If you partition a disk on another system (e.g. laptop), all bytes will be swapped on 16bit level when using |
4cfaf55e5
|
44 |
PCMCIA and running cpu in big endian mode!!!! |
5da627a42
|
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 |
This is probably due to an error in Au1000 chip. Solution: a) Boot via network and partition disk directly from dbau1x00. The endian will then be correct. b) Partition disk on "laptop" and fill it with all files you need. Then write a simple program that endian swaps whole disk, Example: Original "laptop" byte order: B0 B1 B2 B3 B4 B5 B6 B7 B8 B9... Dbau1000 byte order will then be: B1 B0 B3 B2 B5 B4 B7 B6 B9 B8... |