X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-arm%2Fmemory.h;h=e47bea7d17237de5a0cf86d998ff684ec5a5d8e7;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=2cd87b3c24a44a0bdd94d2d19f6b2504cbb21e8c;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index 2cd87b3c2..e47bea7d1 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -13,8 +13,40 @@
 #define __ASM_ARM_MEMORY_H
 
 #include <linux/config.h>
+#include <linux/compiler.h>
 #include <asm/arch/memory.h>
 
+#ifndef TASK_SIZE
+/*
+ * TASK_SIZE - the maximum size of a user space task.
+ * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
+ */
+#define TASK_SIZE		(0xbf000000UL)
+#define TASK_UNMAPPED_BASE	(0x40000000UL)
+#endif
+
+/*
+ * The maximum size of a 26-bit user space task.
+ */
+#define TASK_SIZE_26		(0x04000000UL)
+
+/*
+ * Page offset: 3GB
+ */
+#ifndef PAGE_OFFSET
+#define PAGE_OFFSET		(0xc0000000UL)
+#endif
+
+/*
+ * Physical vs virtual RAM address space conversion.  These are
+ * private definitions which should NOT be used outside memory.h
+ * files.  Use virt_to_phys/phys_to_virt/__pa/__va instead.
+ */
+#ifndef __virt_to_phys
+#define __virt_to_phys(x)	((x) - PAGE_OFFSET + PHYS_OFFSET)
+#define __phys_to_virt(x)	((x) - PHYS_OFFSET + PAGE_OFFSET)
+#endif
+
 /*
  * The module space lives between the addresses given by TASK_SIZE
  * and PAGE_OFFSET - it must be within 32MB of the kernel text.
@@ -28,6 +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.
@@ -63,10 +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.
@@ -128,9 +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