Merge commit 'e26a9e0' into stable/for-linus-3.15

[cascardo/linux.git] / arch / arm / include / asm / memory.h

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 4afb376..02fa255 100644 (file)
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -166,9 +166,17 @@
  * 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.
+ *
+ * PFNs are used to describe any physical page; this means
+ * PFN 0 == physical address 0.
  */
-#ifndef __virt_to_phys
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT
+#if defined(__virt_to_phys)
+#define PHYS_OFFSET    PLAT_PHYS_OFFSET
+#define PHYS_PFN_OFFSET        ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
+
+#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
+
+#elif defined(CONFIG_ARM_PATCH_PHYS_VIRT)
 
 /*
  * Constants used to force the right instruction encodings and shifts
@@ -177,12 +185,17 @@
 #define __PV_BITS_31_24        0x81000000
 #define __PV_BITS_7_0  0x81
 
-extern u64 __pv_phys_offset;
+extern unsigned long __pv_phys_pfn_offset;
 extern u64 __pv_offset;
 extern void fixup_pv_table(const void *, unsigned long);
 extern const void *__pv_table_begin, *__pv_table_end;
 
-#define PHYS_OFFSET __pv_phys_offset
+#define PHYS_OFFSET    ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
+#define PHYS_PFN_OFFSET        (__pv_phys_pfn_offset)
+
+#define virt_to_pfn(kaddr) \
+       ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
+        PHYS_PFN_OFFSET)
 
 #define __pv_stub(from,to,instr,type)                  \
        __asm__("@ __pv_stub\n"                         \
@@ -243,6 +256,7 @@ static inline unsigned long __phys_to_virt(phys_addr_t x)
 #else
 
 #define PHYS_OFFSET    PLAT_PHYS_OFFSET
+#define PHYS_PFN_OFFSET        ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
 
 static inline phys_addr_t __virt_to_phys(unsigned long x)
 {
@@ -254,18 +268,11 @@ static inline unsigned long __phys_to_virt(phys_addr_t x)
        return x - PHYS_OFFSET + PAGE_OFFSET;
 }
 
-#endif
-#endif
+#define virt_to_pfn(kaddr) \
+       ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
+        PHYS_PFN_OFFSET)
 
-/*
- * PFNs are used to describe any physical page; this means
- * PFN 0 == physical address 0.
- *
- * This is the PFN of the first RAM page in the kernel
- * direct-mapped view.  We assume this is the first page
- * of RAM in the mem_map as well.
- */
-#define PHYS_PFN_OFFSET        ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
+#endif
 
 /*
  * These are *only* valid on the kernel direct mapped RAM memory.
@@ -343,9 +350,9 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
  */
 #define ARCH_PFN_OFFSET                PHYS_PFN_OFFSET
 
-#define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_to_page(kaddr)    pfn_to_page(virt_to_pfn(kaddr))
 #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
-                                       && pfn_valid(__pa(kaddr) >> PAGE_SHIFT) )
+                                       && pfn_valid(virt_to_pfn(kaddr)))
 
 #endif