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