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[ARM] fix constant values of MAX_DMA_ADDRESS

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Since 8d5796d2ec, we have allowed
PAGE_OFFSET to be configurable, so a constant virtual address
for MAX_DMA_ADDRESS is buggy.  It should be defined in terms of
PAGE_OFFSET rather than a constant virtual address.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2008-11-29 10:56:33 +00:00 committed by Russell King
parent b9c78022b0
commit c72e005b09
3 changed files with 2 additions and 10 deletions
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2
arch/arm/mach-h720x/include/mach/memory.h
View File

@ -16,6 +16,6 @@
* If you set this, you must also set ISA_DMA_THRESHOLD and setup a DMA
* zone if this does not cover all possible RAM.
*/
#define MAX_DMA_ADDRESS 0xd0000000
#define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_256M)
#endif

8
arch/arm/mach-s3c2410/include/mach/memory.h
View File

@ -13,12 +13,4 @@
#define PHYS_OFFSET UL(0x30000000)
/*
* This is the maximum DMA address(physical address) that can be DMAd to.
* Err, no, this is a virtual address. And you must set ISA_DMA_THRESHOLD
* and setup a DMA zone if this restricts the amount of RAM which is
* capable of DMA.
*/
#define MAX_DMA_ADDRESS 0x40000000
#endif

2
arch/arm/mach-shark/include/mach/memory.h
View File

@ -33,7 +33,7 @@ static inline void __arch_adjust_zones(int node, unsigned long *zone_size, unsig
__arch_adjust_zones(node, size, holes)
#define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_4M - 1)
#define MAX_DMA_ADDRESS 0xC0400000
#define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_4M)
#endif