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Blackfin: abort dma_memcpy() for L1 scratchpad

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2008-08-07 15:30:49 -04:00
parent 81b799add7
commit d31eb38512
1 changed files with 12 additions and 1 deletions
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13
lib_blackfin/string.c
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@ -1,7 +1,7 @@
/*
* U-boot - string.c Contains library routines.
*
* Copyright (c) 2005-2007 Analog Devices Inc.
* Copyright (c) 2005-2008 Analog Devices Inc.
*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@ -130,8 +130,19 @@ int strncmp(const char *cs, const char *ct, size_t count)
# define bfin_write_MDMA_D0_IRQ_STATUS bfin_write_MDMA1_D0_IRQ_STATUS
# define bfin_read_MDMA_D0_IRQ_STATUS bfin_read_MDMA1_D0_IRQ_STATUS
#endif
/* This version misbehaves for count values of 0 and 2^16+.
* Perhaps we should detect that ? Nowhere do we actually
* use dma memcpy for those types of lengths though ...
*/
static void *dma_memcpy(void *dst, const void *src, size_t count)
{
/* Scratchpad cannot be a DMA source or destination */
if (((unsigned long)src >= L1_SRAM_SCRATCH &&
(unsigned long)src < L1_SRAM_SCRATCH_END) ||
((unsigned long)dst >= L1_SRAM_SCRATCH &&
(unsigned long)dst < L1_SRAM_SCRATCH_END))
hang();
if (dcache_status())
blackfin_dcache_flush_range(src, src + count);