ARM: Replace platform definition of ISA_DMA_THRESHOLD/MAX_DMA_ADDRESS

The values of ISA_DMA_THRESHOLD and MAX_DMA_ADDRESS are related; one is
the physical/bus address, the other is the virtual address.  Both need
to be kept in step, so rather than having platforms define both, allow
them to define a single macro which sets both of these macros
appropraitely.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/dma.h

@@ -6,8 +6,10 @@
 /*
  * This is the maximum virtual address which can be DMA'd from.
  */
-#ifndef MAX_DMA_ADDRESS
+#ifndef ARM_DMA_ZONE_SIZE
 #define MAX_DMA_ADDRESS	0xffffffff
+#else
+#define MAX_DMA_ADDRESS	(PAGE_OFFSET + ARM_DMA_ZONE_SIZE)
 #endif
 
 #ifdef CONFIG_ISA_DMA_API

arch/arm/include/asm/memory.h

@@ -209,8 +209,10 @@ static inline unsigned long __phys_to_virt(unsigned long x)
  * allocations.  This must be the smallest DMA mask in the system,
  * so a successful GFP_DMA allocation will always satisfy this.
  */
-#ifndef ISA_DMA_THRESHOLD
+#ifndef ARM_DMA_ZONE_SIZE
 #define ISA_DMA_THRESHOLD	(0xffffffffULL)
+#else
+#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1)
 #endif
 
 #ifndef arch_adjust_zones

arch/arm/mach-davinci/include/mach/memory.h

@@ -59,8 +59,7 @@ __arch_adjust_zones(unsigned long *size, unsigned long *holes)
 #define arch_adjust_zones(zone_size, holes) \
         if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(zone_size, holes)
 
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + (128<<20) - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + (128<<20))
+#define ARM_DMA_ZONE_SIZE	SZ_128M
 
 #endif
 

arch/arm/mach-h720x/include/mach/memory.h

@@ -13,7 +13,6 @@
  * There should not be more than (0xd0000000 - 0xc0000000)
  * bytes of RAM.
  */
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_256M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_256M)
+#define ARM_DMA_ZONE_SIZE	SZ_256M
 
 #endif

arch/arm/mach-ixp4xx/include/mach/memory.h

@@ -21,8 +21,7 @@ void ixp4xx_adjust_zones(unsigned long *size, unsigned long *holes);
 #define arch_adjust_zones(size, holes) \
 	ixp4xx_adjust_zones(size, holes)
 
-#define ISA_DMA_THRESHOLD (SZ_64M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_64M)
+#define ARM_DMA_ZONE_SIZE	SZ_64M
 
 #endif
 

arch/arm/mach-pxa/include/mach/memory.h

@@ -23,8 +23,7 @@ void cmx2xx_pci_adjust_zones(unsigned long *size, unsigned long *holes);
 #define arch_adjust_zones(size, holes) \
 	cmx2xx_pci_adjust_zones(size, holes)
 
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_64M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_64M)
+#define ARM_DMA_ZONE_SIZE	SZ_64M
 #endif
 
 #endif

arch/arm/mach-realview/include/mach/memory.h

@@ -34,8 +34,7 @@ extern void realview_adjust_zones(unsigned long *size, unsigned long *hole);
 #define arch_adjust_zones(size, hole) \
 	realview_adjust_zones(size, hole)
 
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_256M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_256M)
+#define ARM_DMA_ZONE_SIZE	SZ_256M
 #endif
 
 #ifdef CONFIG_SPARSEMEM

arch/arm/mach-sa1100/include/mach/memory.h

@@ -22,8 +22,7 @@ void sa1111_adjust_zones(unsigned long *size, unsigned long *holes);
 #define arch_adjust_zones(size, holes) \
 	sa1111_adjust_zones(size, holes)
 
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_1M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_1M)
+#define ARM_DMA_ZONE_SIZE	SZ_1M
 
 #endif
 #endif

arch/arm/mach-shark/include/mach/memory.h

@@ -32,8 +32,7 @@ static inline void __arch_adjust_zones(unsigned long *zone_size, unsigned long *
 #define arch_adjust_zones(size, holes) \
 	__arch_adjust_zones(size, holes)
 
-#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_4M - 1)
-#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_4M)
+#define ARM_DMA_ZONE_SIZE	SZ_4M
 
 #endif