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authorRobin Getz <robin.getz@analog.com>2009-04-23 20:49:43 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-12 06:11:27 -0400
commitfecbd7366bf5a39eaae2c03541f0b412f319534f (patch)
treeb8b034938d916cc3398708ff6a0749f871a64828 /arch/blackfin/include/asm
parentf5879fda09ea98d7aa845a0e0fa7e508452e5f9f (diff)
Blackfin: fix early L1 relocation crash
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>
Diffstat (limited to 'arch/blackfin/include/asm')
-rw-r--r--arch/blackfin/include/asm/dma.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index e4f7b8043f0..46c56185417 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -253,5 +253,7 @@ static inline void clear_dma_irqstat(unsigned int channel)
void *dma_memcpy(void *dest, const void *src, size_t count);
void *safe_dma_memcpy(void *dest, const void *src, size_t count);
void blackfin_dma_early_init(void);
+void early_dma_memcpy(void *dest, const void *src, size_t count);
+void early_dma_memcpy_done(void);
#endif