From: Kalle Pokki <kalle.pokki@iki.fi>
To: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Badness in dma_alloc_init
Date: Mon, 09 Jan 2006 14:31:03 +0200 [thread overview]
Message-ID: <43C25787.4010204@iki.fi> (raw)
Hi all,
I'm having some trouble with the DMA allocation using Linux 2.6.14-rc2 +
some platform modifications. Namely, the dma_alloc_coherent() function
returns bogus virtual addresses causing machine check exceptions. At
boot, the kernel complains there is something wrong, but I cannot figure
out how to fix it. CONFIG_CONSISTENT_START is at its default value,
0xff100000. Any hints where to look further?
Oh, this is a custom 8xx board. Has the support for DMA in 8xx been
unstable at the time of pre-2.6.14?
Linux version 2.6.14-rc2 (kp@host32.eke.fi) (gcc version 4.0.0 (DENX
ELDK 4.0 4.
0.0)) #1 Mon Jan 9 12:53:41 EET 2006
Built 1 zonelists
Kernel command line: root=/dev/mtdblock1 ro console=ttyCPM0,115200
PID hash table entries: 256 (order: 8, 4096 bytes)
Decrementer Frequency = 247500000/60
Console: colour dummy device 80x25
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 30268k available (1608k kernel code, 376k data, 100k init, 0k
highmem)
Mount-cache hash table entries: 512
Badness in dma_alloc_init at arch/ppc/kernel/dma-mapping.c:348
Call trace: [c0003670] [c0003f24] [c0003320] [c01e2ad0] [c000228c]
[c000551
c]
... followed by otherwise good startup.
next reply other threads:[~2006-01-09 12:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-09 12:31 Kalle Pokki [this message]
2006-01-09 12:53 ` Badness in dma_alloc_init Aristeu Sergio Rozanski Filho
2006-01-09 13:35 ` Kalle Pokki
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