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page_64.h

#ifndef _SPARC64_PAGE_H
#define _SPARC64_PAGE_H

#include <linux/const.h>

#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
#define PAGE_SHIFT   13
#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
#define PAGE_SHIFT   16
#else
#error No page size specified in kernel configuration
#endif

#define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK    (~(PAGE_SIZE-1))

/* Flushing for D-cache alias handling is only needed if
 * the page size is smaller than 16K.
 */
#if PAGE_SHIFT < 14
#define DCACHE_ALIASING_POSSIBLE
#endif

#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
#define HPAGE_SHIFT           22
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
#define HPAGE_SHIFT           19
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
#define HPAGE_SHIFT           16
#endif

#ifdef CONFIG_HUGETLB_PAGE
#define HPAGE_SIZE            (_AC(1,UL) << HPAGE_SHIFT)
#define HPAGE_MASK            (~(HPAGE_SIZE - 1UL))
#define HUGETLB_PAGE_ORDER    (HPAGE_SHIFT - PAGE_SHIFT)
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif

#ifndef __ASSEMBLY__

extern void _clear_page(void *page);
#define clear_page(X)   _clear_page((void *)(X))
struct page;
extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
#define copy_page(X,Y)  memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);

/* Unlike sparc32, sparc64's parameter passing API is more
 * sane in that structures which as small enough are passed
 * in registers instead of on the stack.  Thus, setting
 * STRICT_MM_TYPECHECKS does not generate worse code so
 * let's enable it to get the type checking.
 */

#define 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 iopte; } iopte_t;
typedef struct { unsigned int pmd; } pmd_t;
typedef struct { unsigned int pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)      ((x).pte)
#define iopte_val(x)    ((x).iopte)
#define pmd_val(x)      ((x).pmd)
#define pgd_val(x)      ((x).pgd)
#define pgprot_val(x)   ((x).pgprot)

#define __pte(x)  ((pte_t) { (x) } )
#define __iopte(x)      ((iopte_t) { (x) } )
#define __pmd(x)        ((pmd_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 iopte_t;
typedef unsigned int pmd_t;
typedef unsigned int pgd_t;
typedef unsigned long pgprot_t;

#define pte_val(x)      (x)
#define iopte_val(x)    (x)
#define pmd_val(x)      (x)
#define pgd_val(x)      (x)
#define pgprot_val(x)   (x)

#define __pte(x)  (x)
#define __iopte(x)      (x)
#define __pmd(x)        (x)
#define __pgd(x)  (x)
#define __pgprot(x)     (x)

#endif /* (STRICT_MM_TYPECHECKS) */

typedef struct page *pgtable_t;

#define TASK_UNMAPPED_BASE    (test_thread_flag(TIF_32BIT) ? \
                         (_AC(0x0000000070000000,UL)) : \
                         (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))

#include <asm-generic/memory_model.h>

#endif /* !(__ASSEMBLY__) */

/* We used to stick this into a hard-coded global register (%g4)
 * but that does not make sense anymore.
 */
#define PAGE_OFFSET           _AC(0xFFFFF80000000000,UL)

#ifndef __ASSEMBLY__

#define __pa(x)               ((unsigned long)(x) - PAGE_OFFSET)
#define __va(x)               ((void *)((unsigned long) (x) + PAGE_OFFSET))

#define pfn_to_kaddr(pfn)     __va((pfn) << PAGE_SHIFT)

#define virt_to_page(kaddr)   pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)

#define virt_addr_valid(kaddr)      pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define virt_to_phys __pa
#define phys_to_virt __va

#endif /* !(__ASSEMBLY__) */

#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#include <asm-generic/page.h>

#endif /* _SPARC64_PAGE_H */

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