Hello Ed,
On Thu, 27 Nov 2003, Ed Okerson wrote:
What partition types are you using? I am trying to do a partition table with some linux and at least one FAT16 partition, but even without the FAT partition the system was showing a single partition as:
I have setup two partitions using fdisk on target. fdisk however shows some warnings, but I suspect this is a bug in busybox's fdisk (I might be wrong).
Here's what I get:
------------ paste -------------- # fdisk /dev/discs/disc0/disc /dev/ide/host0/bus0/target0/lun0: p1 p2
Command (m for help): p
Disk /dev/discs/disc0/disc: 128 MB, 128450560 bytes 8 heads, 32 sectors/track, 980 cylinders Units = cylinders of 256 * 512 = 131072 bytes
Device Boot Start End Blocks Id System /dev/discs/disc0/part1 1 77 9840 c Win95 FAT32 (LBA) /dev/discs/disc0/part2 78 980 115584 83 Linux /dev/discs/disc0/part3 1 1 0 0 Empty Partition 3 has different physical/logical beginnings (non-Linux?): phys=(0, 0, 0) logical=(0, 0, 1) Partition 3 has different physical/logical endings: phys=(0, 0, 0) logical=(16777215, 7, 32) Partition 3 does not end on cylinder boundary.
Command (m for help): --------- end of paste -----------
First partition is VFAT (primary), second is Linux(primary). I have not tested extended partitions since I did not find any reason for having them - currently.
However U-Boot ide part shows two partitions:
------------ paste -------------- WEP> ide reset
Reset IDE: SanDisk SDP 5/3 0.6 Fixed Disk Card IDE interface [silicon] [unique] [single] [sleep] [standby] [idle] [low power] Bus 0: OK Device 0: Model: SanDisk SDCFB-128 Firm: Vdg 1.25 Ser#: 1181701L00X20512 Type: Removable Hard Disk Capacity: 122.5 MB = 0.1 GB (250880 x 512) WEP> ide part
Partition Map for IDE device 0 -- Partition Type: DOS
Partition Start Sector Num Sectors Type 1 32 19680 c 2 19712 231168 83 WEP> --------- end of paste -----------
I have not investigated which one is wrong/correct because I can access primary - VFAT - partition on both systems and also on a PC. After I finish VFAT write support in U-Boot, I might go and see which "fdisk" is wrong or correct.
So this morning I started going through and figuring exactly what that meant. It appears that the first line shows up if the boot sector of the compact flash card has a DOS boot signature that is what you get. So apparently some idiot (probably me) at some point in time formated that CF card in a DOS machine with the /s option and it happily copied a DOS boot record into the beginning of the card. Boy do I feel stupid. So I popped the CF into a linux machine and typed "cat /dev/zero > /dev/hdg" re-ran fdisk to create my partitions, and now u-boot happily reports:
DbAu1x00 # ide part
Partition Map for IDE device 0 -- Partition Type: DOS
Partition Start Sector Num Sectors Type 1 32 4576 83 2 4608 4608 83 3 9216 492544 83 DbAu1x00 #
Which is what I wanted. I have been using #if defined(CONFIG_AU1X00) around my code mods, but it sounds like your changes and my changes are about the same in the end, so perhaps we should come up with another define for ENDIAN_CHALLENGED or something.
I think we should stick to defines that are already used. The endian issues should be wraped with __LITTLE_ENDIAN or __BIG_ENDIAN, specific board issues with CONFIG_AU1X00 or CONFIG_WEPEP250 in my case. I have already submitted the patch for PCMCIA on PXA and that patch fixes the issues with Firmware Revision, Model Number and lba_capacity wrapped with endian #ifdef.
When Wolfgang gets some time for U-Boot and examines the patch and hopefully applies it, you will be able to distinguish between "common" patch and your board specific one.
It helped a lot. Thanks. I guess the moral of the story is when you are having problems, make sure there isn't a short between the keyboard and the chair first. :)
Keep up the good work!