1 files changed, 200 insertions, 0 deletions

diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
new file mode 100644
index 000000000000..e47bea7d1723
--- /dev/null
+++ b/include/asm-arm/memory.h
@@ -0,0 +1,200 @@
+/*
+ *  linux/include/asm-arm/memory.h
+ *
+ *  Copyright (C) 2000-2002 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Note: this file should not be included by non-asm/.h files
+ */
+#ifndef __ASM_ARM_MEMORY_H
+#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.
+ */
+#define MODULE_END      (PAGE_OFFSET)
+#define MODULE_START    (MODULE_END - 16*1048576)
+
+#if TASK_SIZE > MODULE_START
+#error Top of user space clashes with start of module space
+#endif
+
+#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.
+ *
+ * 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 (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
+ * translation for translating DMA addresses.  Use the driver
+ * DMA support - see dma-mapping.h.
+ */
+static inline unsigned long virt_to_phys(void *x)
+{
+        return __virt_to_phys((unsigned long)(x));
+}
+
+static inline void *phys_to_virt(unsigned long x)
+{
+        return (void *)(__phys_to_virt((unsigned long)(x)));
+}
+
+/*
+ * Drivers should NOT use these either.
+ */
+#define __pa(x)                 __virt_to_phys((unsigned long)(x))
+#define __va(x)                 ((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* (and that doesn't mean
+ * use the __ prefixed forms instead.)  See dma-mapping.h.
+ */
+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.
+ *
+ * Note: when converting an unknown physical address to a
+ * struct page, the resulting pointer must be validated
+ * using VALID_PAGE().  It must return an invalid struct page
+ * for any physical address not corresponding to a system
+ * RAM address.
+ *
+ *  page_to_pfn(page)   convert a struct page * to a PFN number
+ *  pfn_to_page(pfn)    convert a _valid_ PFN number to struct page *
+ *  pfn_valid(pfn)      indicates whether a PFN number is valid
+ *
+ *  virt_to_page(k)     convert a _valid_ virtual address to struct page *
+ *  virt_addr_valid(k)  indicates whether a virtual address is valid
+ */
+#ifndef CONFIG_DISCONTIGMEM
+
+#define page_to_pfn(page)       (((page) - mem_map) + PHYS_PFN_OFFSET)
+#define pfn_to_page(pfn)        ((mem_map + (pfn)) - PHYS_PFN_OFFSET)
+#define pfn_valid(pfn)          ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))
+
+#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 PHYS_TO_NID(addr)       (0)
+
+#else /* CONFIG_DISCONTIGMEM */
+
+/*
+ * This is more complex.  We have a set of mem_map arrays spread
+ * around in memory.
+ */
+#include <linux/numa.h>
+
+#define page_to_pfn(page)                                       \
+        (( (page) - page_zone(page)->zone_mem_map)              \
+          + page_zone(page)->zone_start_pfn)
+#define pfn_to_page(pfn)                                        \
+        (PFN_TO_MAPBASE(pfn) + LOCAL_MAP_NR((pfn) << PAGE_SHIFT))
+#define pfn_valid(pfn)          (PFN_TO_NID(pfn) < MAX_NUMNODES)
+
+#define virt_to_page(kaddr)                                     \
+        (ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
+#define virt_addr_valid(kaddr)  (KVADDR_TO_NID(kaddr) < MAX_NUMNODES)
+
+/*
+ * Common discontigmem stuff.
+ *  PHYS_TO_NID is used by the ARM kernel/setup.c
+ */
+#define PHYS_TO_NID(addr)       PFN_TO_NID((addr) >> PAGE_SHIFT)
+
+#endif /* !CONFIG_DISCONTIGMEM */
+
+/*
+ * For BIO.  "will die".  Kill me when bio_to_phys() and bvec_to_phys() die.
+ */
+#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.
+ */
+#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
+
+#endif