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author | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-01-15 18:16:59 +0800 |
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committer | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-03-17 09:19:08 +0800 |
commit | b50f1704e9c441c58cf6dc05e72953ca30e1d4d2 (patch) | |
tree | bfd7f81c849aa42f6355d9fb383f2167c5f0e087 /arch/unicore32/include/asm/page.h | |
parent | f73670e8a55c11d47c28dca35dc4bc7dfbd4e6eb (diff) | |
download | blackbird-op-linux-b50f1704e9c441c58cf6dc05e72953ca30e1d4d2.tar.gz blackbird-op-linux-b50f1704e9c441c58cf6dc05e72953ca30e1d4d2.zip |
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.h | 80 |
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 |