1 files changed, 128 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/page.h b/arch/mn10300/include/asm/page.h
new file mode 100644
index 000000000..8288e1241
--- /dev/null
+++ b/arch/mn10300/include/asm/page.h
@@ -0,0 +1,128 @@
+/* MN10300 Page table definitions
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_PAGE_H
+#define _ASM_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT	12
+
+#ifndef __ASSEMBLY__
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE - 1))
+#else
+#define PAGE_SIZE	+(1 << PAGE_SHIFT)	/* unary plus marks an
+						 * immediate val not an addr */
+#define PAGE_MASK	+(~(PAGE_SIZE - 1))
+#endif
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to, from)	memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#define clear_user_page(addr, vaddr, page)	clear_page(addr)
+#define copy_user_page(vto, vfrom, vaddr, to)	copy_page(vto, vfrom)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
+
+#define PTE_MASK	PAGE_MASK
+#define HPAGE_SHIFT	22
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SIZE		((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
+#endif
+
+#define pte_val(x)	((x).pte)
+#define pgd_val(x)	((x).pgd)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) })
+#define __pgd(x)	((pgd_t) { (x) })
+#define __pgprot(x)	((pgprot_t) { (x) })
+
+#include <asm-generic/pgtable-nopmd.h>
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * This handles the memory map.. We could make this a config
+ * option, but too many people screw it up, and too few need
+ * it.
+ *
+ * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
+ * a virtual address space of one gigabyte, which limits the
+ * amount of physical memory you can use to about 950MB.
+ */
+
+#ifndef __ASSEMBLY__
+
+/* Pure 2^n version of get_order */
+static inline int get_order(unsigned long size) __attribute__((const));
+static inline int get_order(unsigned long size)
+{
+	int order;
+
+	size = (size - 1) >> (PAGE_SHIFT - 1);
+	order = -1;
+	do {
+		size >>= 1;
+		order++;
+	} while (size);
+	return order;
+}
+
+#endif /* __ASSEMBLY__ */
+
+#include <asm/page_offset.h>
+
+#define __PAGE_OFFSET		(PAGE_OFFSET_RAW)
+#define PAGE_OFFSET		((unsigned long) __PAGE_OFFSET)
+
+/*
+ * main RAM and kernel working space are coincident at 0x90000000, but to make
+ * life more interesting, there's also an uncached virtual shadow at 0xb0000000
+ * - these mappings are fixed in the MMU
+ */
+#define __pfn_disp		(CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT)
+
+#define __pa(x)			((unsigned long)(x))
+#define __va(x)			((void *)(unsigned long)(x))
+#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
+#define pfn_to_page(pfn)	(mem_map + ((pfn) - __pfn_disp))
+#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + __pfn_disp)
+
+#define pfn_valid(pfn)					\
+({							\
+	unsigned long __pfn = (pfn) - __pfn_disp;	\
+	__pfn < max_mapnr;				\
+})
+
+#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS \
+	(VM_READ | VM_WRITE | \
+	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
+		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_PAGE_H */