1 files changed, 101 insertions, 0 deletions

diff --git a/include/asm-arm26/memory.h b/include/asm-arm26/memory.h
new file mode 100644
index 000000000000..20d78616f650
--- /dev/null
+++ b/include/asm-arm26/memory.h
@@ -0,0 +1,101 @@
+/*
+ *  linux/include/asm-arm26/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
+
+/*
+ * User space: 26MB
+ */
+#define TASK_SIZE       (0x01a00000UL)
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+
+/*
+ * Page offset: 32MB
+ */
+#define PAGE_OFFSET     (0x02000000UL)
+#define PHYS_OFFSET     (0x02000000UL)
+
+#define PHYS_TO_NID(addr)       (0)
+
+/*
+ * 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.
+ */
+static inline unsigned long virt_to_phys(void *x)
+{
+        return (unsigned long)x;
+}
+
+static inline void *phys_to_virt(unsigned long x)
+{
+        return (void *)((unsigned long)x);
+}
+
+#define __pa(x)                 (unsigned long)(x)
+#define __va(x)                 ((void *)(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 *depreciated*.
+ */
+#define virt_to_bus(x)          ((unsigned long)(x))
+#define bus_to_virt(x)          ((void *)((unsigned long)(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
+ */
+#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)  ((int)(kaddr) >= PAGE_OFFSET && (int)(kaddr) < (unsigned long)high_memory)
+
+/*
+ * 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)
+
+/*
+ * We should really eliminate virt_to_bus() here - it's depreciated.
+ */
+#define page_to_bus(page)       (page_address(page))
+
+#endif