Merge branches 'amba', 'fixes', 'misc', 'mmci', 'unstable/omap-dma' and 'unstable...

[linux-drm-fsl-dcu.git] / arch / arm / include / asm / memory.h

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 9ecccc865046a2c257277cd03a8f607ed5e0217d..02fa2558f6626a71e6132844986776c46581388f 100644 (file)
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -30,14 +30,15 @@
  */
 #define UL(x) _AC(x, UL)
 
+/* PAGE_OFFSET - the virtual address of the start of the kernel image */
+#define PAGE_OFFSET            UL(CONFIG_PAGE_OFFSET)
+
 #ifdef CONFIG_MMU
 
 /*
- * PAGE_OFFSET - the virtual address of the start of the kernel image
  * TASK_SIZE - the maximum size of a user space task.
  * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
  */
-#define PAGE_OFFSET            UL(CONFIG_PAGE_OFFSET)
 #define TASK_SIZE              (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
 #define TASK_UNMAPPED_BASE     ALIGN(TASK_SIZE / 3, SZ_16M)
 
@@ -100,23 +101,15 @@
 #define TASK_UNMAPPED_BASE     UL(0x00000000)
 #endif
 
-#ifndef PHYS_OFFSET
-#define PHYS_OFFSET            UL(CONFIG_DRAM_BASE)
-#endif
-
 #ifndef END_MEM
 #define END_MEM                (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
 #endif
 
-#ifndef PAGE_OFFSET
-#define PAGE_OFFSET            (PHYS_OFFSET)
-#endif
-
 /*
  * The module can be at any place in ram in nommu mode.
  */
 #define MODULES_END            (END_MEM)
-#define MODULES_VADDR          (PHYS_OFFSET)
+#define MODULES_VADDR          PAGE_OFFSET
 
 #define XIP_VIRT_ADDR(physaddr)  (physaddr)
 
@@ -157,15 +150,33 @@
 #endif
 #define ARCH_PGD_MASK          ((1 << ARCH_PGD_SHIFT) - 1)
 
+/*
+ * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
+ * memory.  This is used for XIP and NoMMU kernels, or by kernels which
+ * have their own mach/memory.h.  Assembly code must always use
+ * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
+ */
+#ifndef PLAT_PHYS_OFFSET
+#define PLAT_PHYS_OFFSET       UL(CONFIG_PHYS_OFFSET)
+#endif
+
 #ifndef __ASSEMBLY__
 
 /*
  * 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
@@ -174,12 +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"                         \
@@ -239,6 +255,9 @@ 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)
 {
        return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
@@ -249,30 +268,12 @@ static inline unsigned long __phys_to_virt(phys_addr_t x)
        return x - PHYS_OFFSET + PAGE_OFFSET;
 }
 
-#endif
-#endif
-#endif /* __ASSEMBLY__ */
+#define virt_to_pfn(kaddr) \
+       ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
+        PHYS_PFN_OFFSET)
 
-#ifndef PHYS_OFFSET
-#ifdef PLAT_PHYS_OFFSET
-#define PHYS_OFFSET    PLAT_PHYS_OFFSET
-#else
-#define PHYS_OFFSET    UL(CONFIG_PHYS_OFFSET)
-#endif
 #endif
 
-#ifndef __ASSEMBLY__
-
-/*
- * 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))
-
 /*
  * These are *only* valid on the kernel direct mapped RAM memory.
  * Note: Drivers should NOT use these.  They are the wrong
@@ -349,8 +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_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
+#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(virt_to_pfn(kaddr)))
 
 #endif