vserver 1.9.3

[linux-2.6.git] / include / asm-arm / memory.h

diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index 75da0b9..e47bea7 100644 (file)
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -13,6 +13,7 @@
 #define __ASM_ARM_MEMORY_H
 
 #include <linux/config.h>
+#include <linux/compiler.h>
 #include <asm/arch/memory.h>
 
 #ifndef TASK_SIZE
@@ -59,6 +60,20 @@
 
 #ifndef __ASSEMBLY__
 
+/*
+ * The DMA mask corresponding to the maximum bus address allocatable
+ * using GFP_DMA.  The default here places no restriction on DMA
+ * 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
+#define ISA_DMA_THRESHOLD      (0xffffffffULL)
+#endif
+
+#ifndef arch_adjust_zones
+#define arch_adjust_zones(node,size,holes) do { } while (0)
+#endif
+
 /*
  * PFNs are used to describe any physical page; this means
  * PFN 0 == physical address 0.
@@ -94,10 +109,18 @@ static inline void *phys_to_virt(unsigned long x)
 /*
  * Virtual <-> DMA view memory address translations
  * Again, these are *only* valid on the kernel direct mapped RAM
- * memory.  Use of these is *deprecated*.
+ * memory.  Use of these is *deprecated* (and that doesn't mean
+ * use the __ prefixed forms instead.)  See dma-mapping.h.
  */
-#define virt_to_bus(x)         (__virt_to_bus((unsigned long)(x)))
-#define bus_to_virt(x)         ((void *)(__bus_to_virt((unsigned long)(x))))
+static inline __deprecated unsigned long virt_to_bus(void *x)
+{
+       return __virt_to_bus((unsigned long)x);
+}
+
+static inline __deprecated void *bus_to_virt(unsigned long x)
+{
+       return (void *)__bus_to_virt(x);
+}
 
 /*
  * Conversion between a struct page and a physical address.
@@ -159,9 +182,18 @@ static inline void *phys_to_virt(unsigned long x)
 #define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 
 /*
+ * Optional device DMA address remapping. Do _not_ use directly!
  * We should really eliminate virt_to_bus() here - it's deprecated.
  */
-#define page_to_bus(page)      (virt_to_bus(page_address(page)))
+#ifndef __arch_page_to_dma
+#define page_to_dma(dev, page)         ((dma_addr_t)__virt_to_bus((unsigned long)page_address(page)))
+#define dma_to_virt(dev, addr)         ((void *)__bus_to_virt(addr))
+#define virt_to_dma(dev, addr)         ((dma_addr_t)__virt_to_bus((unsigned long)(addr)))
+#else
+#define page_to_dma(dev, page)         (__arch_page_to_dma(dev, page))
+#define dma_to_virt(dev, addr)         (__arch_dma_to_virt(dev, addr))
+#define virt_to_dma(dev, addr)         (__arch_virt_to_dma(dev, addr))
+#endif
 
 #endif