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authorGuanXuetao <gxt@mprc.pku.edu.cn>2011-01-15 18:16:59 +0800
committerGuanXuetao <gxt@mprc.pku.edu.cn>2011-03-17 09:19:08 +0800
commitb50f1704e9c441c58cf6dc05e72953ca30e1d4d2 (patch)
treebfd7f81c849aa42f6355d9fb383f2167c5f0e087 /arch/unicore32/include/asm/page.h
parentf73670e8a55c11d47c28dca35dc4bc7dfbd4e6eb (diff)
downloadblackbird-op-linux-b50f1704e9c441c58cf6dc05e72953ca30e1d4d2.tar.gz
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unicore32 core architecture: mm related: generic codes
This patch includes generic codes for memory management. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/unicore32/include/asm/page.h')
-rw-r--r--arch/unicore32/include/asm/page.h80
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/page.h b/arch/unicore32/include/asm/page.h
new file mode 100644
index 000000000000..594b3226250e
--- /dev/null
+++ b/arch/unicore32/include/asm/page.h
@@ -0,0 +1,80 @@
+/*
+ * linux/arch/unicore32/include/asm/page.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * 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.
+ */
+#ifndef __UNICORE_PAGE_H__
+#define __UNICORE_PAGE_H__
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT 12
+#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+#ifndef __ASSEMBLY__
+
+struct page;
+struct vm_area_struct;
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
+extern void copy_page(void *to, const void *from);
+
+#define clear_user_page(page, vaddr, pg) clear_page(page)
+#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+
+#undef STRICT_MM_TYPECHECKS
+
+#ifdef STRICT_MM_TYPECHECKS
+/*
+ * 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;
+
+#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) })
+
+#else
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef unsigned long pgd_t;
+typedef unsigned long pgprot_t;
+
+#define pte_val(x) (x)
+#define pgd_val(x) (x)
+#define pgprot_val(x) (x)
+
+#define __pte(x) (x)
+#define __pgd(x) (x)
+#define __pgprot(x) (x)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+typedef struct page *pgtable_t;
+
+extern int pfn_valid(unsigned long);
+
+#include <asm/memory.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS \
+ (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/getorder.h>
+
+#endif
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