Blackfin: fix early L1 relocation crash

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Our early L1 relocate code may implicitly call code which lives in L1
memory.  This is due to the dma_memcpy() rewrite that made the DMA code
lockless and safe to be used by multiple processes.  If we start the
early DMA memcpy to relocate things into L1 instruction but then our
DMA memcpy code calls a function that lives in L1, things fall apart.
As such, create a small dedicated DMA memcpy routine that we can assume
sanity at boot time.

Reported-by: Filip Van Rillaer <filip.vanrillaer@oneaccess-net.com>
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

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Robin Getz 2009-04-23 20:49:43 +00:00 • committed by Mike Frysinger

parent f5879fda09

commit fecbd7366b

3 changed files with 111 additions and 23 deletions

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2

arch/blackfin/include/asm/dma.h

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81

arch/blackfin/kernel/bfin_dma_5xx.c

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53

arch/blackfin/kernel/setup.c

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