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Re: [microblaze-uclinux] memec v2p7 booting issue

It seems I am not the only one having this problem.
I read through some old emails on this mailing list, and someone mentioned something about the romfs beginning exactly in the .bss section of the image, and that the romfs is "moved" at boot time to another location.
Have I misunderstood this?

If this is the case, then where exactly does it move it to? If it is not being moved, perhaps there is a conflict with the romfs and the .bss section?

It seems to point to some problem with reading the romfs. The uclinux[mtd] probe seems to find the filesystem ok (I dont know what it does to do this...) but are thre any simple tests that I could include in the init/main.c to test romfs readability before the hang I usually get? By hang I mean where it is unable execute the first file in the romfs, around line 650 of init/main.c

Also, a few more curious points:

After the "hang", I have seen the console echo back characters to me when typed. Does this indicate some life in the system?

Also, on some occasions, I have seen XMD report an error just at this hang point, and print a handful or random characters to the screen. Is it possible that uClinux is trying to use the debug uart as some kind on console? Shouldn't it use the same uart (console_uart) that is has been using all the time while booting?


Curious issues!!

p.s. a bit off-topic, but anyone tried the MicroBlaze version 4.0 with cachelink, multichanel SDRAM controller and hard fpu with uClinux yet? Is it blindingly fast? I've seen that (in theory - dont have a chip to test it yet), a typical uclinux system, supporting all of the above, could run about 150MHz on a V4 LX25-12. That's pretty fast!!!

Cheers,
John


mcnernbm@notes.udayton.edu wrote:

Using the auto-config method I receive the following when I try to run the build kernel:

Calibrating delay loop... 32.97 BogoMIPS
Memory: 16MB = 16MB total
Memory: 15400KB available (601K code, 196K data, 32K init)
Dentry cache hash table entries: 2048 (order: 2, 16384 bytes)
Inode cache hash table entries: 1024 (order: 1, 8192 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Microblaze UARTlite serial driver version 1.00
ttyS0 at 0xffff2000 (irq = 1) is a Microblaze UARTlite
Starting kswapd
xgpio #0 at 0xFFFF5000 mapped to 0xFFFF5000
Xilinx GPIO registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
uclinux[mtd]: RAM probe address=0x800c791c size=0x77000
uclinux[mtd]: root filesystem index=0
VFS: Mounted root (romfs filesystem) readonly.
Freeing init memory: 32K
release_dev: driver.table[60] not tty for (04:40)
Warning: unable to open an initial console.
Kernel panic: No init found.  Try passing init= option to kernel.

I am not sure what to try I have already changed the mdm from flash to the generic rom/ram setting.
ANy help would be greatly appreciated also atached are the .mhs and .mss files from the hardware.  I am also using EDK 7.1. 

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