Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)

 * Copyright 2003 PathScale, Inc.

 * Licensed under the GPL

 */

#ifndef __UM_PAGE_H

#define __UM_PAGE_H

struct page;

#include <linux/types.h>

#include <asm/vm-flags.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT      12

#define PAGE_SIZE       (1UL << PAGE_SHIFT)

#define PAGE_MASK       (~(PAGE_SIZE-1))

/*

 * These are used to make use of C type-checking..

 */

#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(page, vaddr, pg)        clear_page(page)

#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)

#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)

typedef struct { unsigned long pte_low, pte_high; } pte_t;

typedef struct { unsigned long long pmd; } pmd_t;

typedef struct { unsigned long pgd; } pgd_t;

#define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))

#define pte_get_bits(pte, bits) ((pte).pte_low & (bits))

#define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))

#define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))

#define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \

                              smp_wmb(); \

                              (to).pte_low = (from).pte_low; })

#define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)

#define pte_set_val(pte, phys, prot) \

        ({ (pte).pte_high = (phys) >> 32; \

           (pte).pte_low = (phys) | pgprot_val(prot); })

#define pmd_val(x)      ((x).pmd)

#define __pmd(x) ((pmd_t) { (x) } )

typedef unsigned long long pfn_t;

typedef unsigned long long phys_t;

#else

typedef struct { unsigned long pte; } pte_t;

typedef struct { unsigned long pgd; } pgd_t;

#ifdef CONFIG_3_LEVEL_PGTABLES

typedef struct { unsigned long pmd; } pmd_t;

#define pmd_val(x)      ((x).pmd)

#define __pmd(x) ((pmd_t) { (x) } )

#endif

#define pte_val(x)      ((x).pte)

#define pte_get_bits(p, bits) ((p).pte & (bits))

#define pte_set_bits(p, bits) ((p).pte |= (bits))

#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))

#define pte_copy(to, from) ((to).pte = (from).pte)

#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))

#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))

typedef unsigned long pfn_t;

typedef unsigned long phys_t;

#endif

typedef struct { unsigned long pgprot; } pgprot_t;

#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) } )

/* to align the pointer to the (next) page boundary */

#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)

extern unsigned long uml_physmem;

#define PAGE_OFFSET (uml_physmem)

#define KERNELBASE PAGE_OFFSET

#define __va_space (8*1024*1024)

#include "mem.h"

/* Cast to unsigned long before casting to void * to avoid a warning from

 * mmap_kmem about cutting a long long down to a void *.  Not sure that

 * casting is the right thing, but 32-bit UML can't have 64-bit virtual

 * addresses

 */

#define __pa(virt) to_phys((void *) (unsigned long) (virt))

#define __va(phys) to_virt((unsigned long) (phys))

#define phys_to_pfn(p) ((p) >> PAGE_SHIFT)

#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)

#define pfn_valid(pfn) ((pfn) < max_mapnr)

#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))

extern struct page *arch_validate(struct page *page, gfp_t mask, int order);

#define HAVE_ARCH_VALIDATE

#include <asm-generic/memory_model.h>

#include <asm-generic/page.h>

#endif