141 lines
4.0 KiB
C
141 lines
4.0 KiB
C
/*
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* Copyright (C) 2008 Michal Simek
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* Copyright (C) 2008 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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* Changes for MMU support:
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* Copyright (C) 2007 Xilinx, Inc. All rights reserved.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_PAGE_H
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#define _ASM_MICROBLAZE_PAGE_H
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#include <linux/pfn.h>
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#include <asm/setup.h>
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT (12)
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
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#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
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/* align addr on a size boundary - adjust address up/down if needed */
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#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
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#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
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/* align addr on a size boundary - adjust address up if needed */
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#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
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/*
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* PAGE_OFFSET -- the first address of the first page of memory. When not
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* using MMU this corresponds to the first free page in physical memory (aligned
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* on a page boundary).
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*/
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extern unsigned int __page_offset;
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#define PAGE_OFFSET __page_offset
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
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#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
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#define free_user_page(page, addr) free_page(addr)
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#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
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#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
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#define copy_user_page(vto, vfrom, vaddr, topg) \
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memcpy((vto), (vfrom), PAGE_SIZE)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct page *pgtable_t;
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct { unsigned long ste[64]; } pmd_t;
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typedef struct { pmd_t pue[1]; } pud_t;
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typedef struct { pud_t pge[1]; } pgd_t;
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#define pte_val(x) ((x).pte)
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#define pgprot_val(x) ((x).pgprot)
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#define pmd_val(x) ((x).ste[0])
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#define pud_val(x) ((x).pue[0])
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#define pgd_val(x) ((x).pge[0])
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#define __pte(x) ((pte_t) { (x) })
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#define __pmd(x) ((pmd_t) { (x) })
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#define __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_t) { (x) })
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/**
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* Conversions for virtual address, physical address, pfn, and struct
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* page are defined in the following files.
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*
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* virt -+
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* | asm-microblaze/page.h
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* phys -+
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* | linux/pfn.h
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* pfn -+
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* | asm-generic/memory_model.h
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* page -+
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*
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*/
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extern unsigned long max_low_pfn;
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extern unsigned long min_low_pfn;
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extern unsigned long max_pfn;
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#define __pa(vaddr) ((unsigned long) (vaddr))
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#define __va(paddr) ((void *) (paddr))
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#define phys_to_pfn(phys) (PFN_DOWN(phys))
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#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
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#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
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#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
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#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
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#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
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#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
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#define page_to_bus(page) (page_to_phys(page))
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#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
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extern unsigned int memory_start;
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extern unsigned int memory_end;
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extern unsigned int memory_size;
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#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_mapnr)
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#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
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#else
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#define tophys(rd, rs) (addik rd, rs, 0)
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#define tovirt(rd, rs) (addik rd, rs, 0)
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#endif /* __ASSEMBLY__ */
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#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
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/* Convert between virtual and physical address for MMU. */
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/* Handle MicroBlaze processor with virtual memory. */
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#define __virt_to_phys(addr) addr
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#define __phys_to_virt(addr) addr
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#define TOPHYS(addr) __virt_to_phys(addr)
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#endif /* __KERNEL__ */
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#include <asm-generic/memory_model.h>
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#include <asm-generic/page.h>
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#endif /* _ASM_MICROBLAZE_PAGE_H */
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