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#ifndef _SPARC64_PAGE_H
#define _SPARC64_PAGE_H
#include <linux/const.h>
#define PAGE_SHIFT 13
#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
#define HPAGE_SHIFT 22
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
#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__
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
struct pt_regs;
extern void hugetlb_setup(struct pt_regs *regs);
#endif
#define WANT_PAGE_VIRTUAL
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 pte_t *pgtable_t;
/* These two values define the virtual address space range in which we
* must forbid 64-bit user processes from making mappings. It
* represents the virtual address space hole present in most early
* sparc64 chips including UltraSPARC-I. The next two defines specify
* the actual exclusion region we enforce, wherein we use a 4GB red
* zone on each side of the VA hole.
*/
#define SPARC64_VA_HOLE_TOP _AC(0xfffff80000000000,UL)
#define SPARC64_VA_HOLE_BOTTOM _AC(0x0000080000000000,UL)
#define VA_EXCLUDE_START (SPARC64_VA_HOLE_BOTTOM - (1UL << 32UL))
#define VA_EXCLUDE_END (SPARC64_VA_HOLE_TOP + (1UL << 32UL))
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
_AC(0x0000000070000000,UL) : \
VA_EXCLUDE_END)
#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 MAX_SUPPORTED_PA_BITS 43
#define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X)))
#define PAGE_OFFSET PAGE_OFFSET_BY_BITS(MAX_SUPPORTED_PA_BITS)
/* The "virtual" portion of PAGE_OFFSET, used to clip off the non-physical
* bits of a linear kernel address.
*/
#define PAGE_OFFSET_VA_BITS (64 - MAX_SUPPORTED_PA_BITS)
/* The actual number of physical memory address bits we support, this is
* used to size various tables used to manage kernel TLB misses.
*/
#define MAX_PHYS_ADDRESS_BITS 41
/* These two shift counts are used when indexing sparc64_valid_addr_bitmap
* and kpte_linear_bitmap.
*/
#define ILOG2_4MB 22
#define ILOG2_256MB 28
#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/getorder.h>
#endif /* _SPARC64_PAGE_H */
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