LXR linux/arch/sparc/include/asm/page

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _SPARC64_PAGE_H
   3#define _SPARC64_PAGE_H
   4
   5#include <linux/const.h>
   6
   7#define PAGE_SHIFT   13
   8
   9#define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
  10#define PAGE_MASK    (~(PAGE_SIZE-1))
  11
  12/* Flushing for D-cache alias handling is only needed if
  13 * the page size is smaller than 16K.
  14 */
  15#if PAGE_SHIFT < 14
  16#define DCACHE_ALIASING_POSSIBLE
  17#endif
  18
  19#define HPAGE_SHIFT             23
  20#define REAL_HPAGE_SHIFT        22
  21#define HPAGE_16GB_SHIFT        34
  22#define HPAGE_2GB_SHIFT         31
  23#define HPAGE_256MB_SHIFT       28
  24#define HPAGE_64K_SHIFT         16
  25#define REAL_HPAGE_SIZE         (_AC(1,UL) << REAL_HPAGE_SHIFT)
  26
  27#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
  28#define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
  29#define HPAGE_MASK              (~(HPAGE_SIZE - 1UL))
  30#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
  31#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
  32#define REAL_HPAGE_PER_HPAGE    (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
  33#define HUGE_MAX_HSTATE         5
  34#endif
  35
  36#ifndef __ASSEMBLY__
  37
  38#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
  39struct pt_regs;
  40void hugetlb_setup(struct pt_regs *regs);
  41#endif
  42
  43#define WANT_PAGE_VIRTUAL
  44
  45void _clear_page(void *page);
  46#define clear_page(X)   _clear_page((void *)(X))
  47struct page;
  48void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
  49#define copy_page(X,Y)  memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
  50void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
  51#define __HAVE_ARCH_COPY_USER_HIGHPAGE
  52struct vm_area_struct;
  53void copy_user_highpage(struct page *to, struct page *from,
  54                        unsigned long vaddr, struct vm_area_struct *vma);
  55#define __HAVE_ARCH_COPY_HIGHPAGE
  56void copy_highpage(struct page *to, struct page *from);
  57
  58/* Unlike sparc32, sparc64's parameter passing API is more
  59 * sane in that structures which as small enough are passed
  60 * in registers instead of on the stack.  Thus, setting
  61 * STRICT_MM_TYPECHECKS does not generate worse code so
  62 * let's enable it to get the type checking.
  63 */
  64
  65#define STRICT_MM_TYPECHECKS
  66
  67#ifdef STRICT_MM_TYPECHECKS
  68/* These are used to make use of C type-checking.. */
  69typedef struct { unsigned long pte; } pte_t;
  70typedef struct { unsigned long iopte; } iopte_t;
  71typedef struct { unsigned long pmd; } pmd_t;
  72typedef struct { unsigned long pud; } pud_t;
  73typedef struct { unsigned long pgd; } pgd_t;
  74typedef struct { unsigned long pgprot; } pgprot_t;
  75
  76#define pte_val(x)      ((x).pte)
  77#define iopte_val(x)    ((x).iopte)
  78#define pmd_val(x)      ((x).pmd)
  79#define pud_val(x)      ((x).pud)
  80#define pgd_val(x)      ((x).pgd)
  81#define pgprot_val(x)   ((x).pgprot)
  82
  83#define __pte(x)        ((pte_t) { (x) } )
  84#define __iopte(x)      ((iopte_t) { (x) } )
  85#define __pmd(x)        ((pmd_t) { (x) } )
  86#define __pud(x)        ((pud_t) { (x) } )
  87#define __pgd(x)        ((pgd_t) { (x) } )
  88#define __pgprot(x)     ((pgprot_t) { (x) } )
  89
  90#else
  91/* .. while these make it easier on the compiler */
  92typedef unsigned long pte_t;
  93typedef unsigned long iopte_t;
  94typedef unsigned long pmd_t;
  95typedef unsigned long pud_t;
  96typedef unsigned long pgd_t;
  97typedef unsigned long pgprot_t;
  98
  99#define pte_val(x)      (x)
 100#define iopte_val(x)    (x)
 101#define pmd_val(x)      (x)
 102#define pud_val(x)      (x)
 103#define pgd_val(x)      (x)
 104#define pgprot_val(x)   (x)
 105
 106#define __pte(x)        (x)
 107#define __iopte(x)      (x)
 108#define __pmd(x)        (x)
 109#define __pud(x)        (x)
 110#define __pgd(x)        (x)
 111#define __pgprot(x)     (x)
 112
 113#endif /* (STRICT_MM_TYPECHECKS) */
 114
 115typedef pte_t *pgtable_t;
 116
 117extern unsigned long sparc64_va_hole_top;
 118extern unsigned long sparc64_va_hole_bottom;
 119
 120/* The next two defines specify the actual exclusion region we
 121 * enforce, wherein we use a 4GB red zone on each side of the VA hole.
 122 */
 123#define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
 124#define VA_EXCLUDE_END   (sparc64_va_hole_top + (1UL << 32UL))
 125
 126#define TASK_UNMAPPED_BASE      (test_thread_flag(TIF_32BIT) ? \
 127                                 _AC(0x0000000070000000,UL) : \
 128                                 VA_EXCLUDE_END)
 129
 130#include <asm-generic/memory_model.h>
 131
 132extern unsigned long PAGE_OFFSET;
 133
 134#endif /* !(__ASSEMBLY__) */
 135
 136/* The maximum number of physical memory address bits we support.  The
 137 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
 138 * evaluates to.
 139 */
 140#define MAX_PHYS_ADDRESS_BITS   53
 141
 142#define ILOG2_4MB               22
 143#define ILOG2_256MB             28
 144
 145#ifndef __ASSEMBLY__
 146
 147#define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
 148#define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
 149
 150#define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
 151
 152#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
 153
 154#define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 155
 156#define virt_to_phys __pa
 157#define phys_to_virt __va
 158
 159#endif /* !(__ASSEMBLY__) */
 160
 161#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
 162                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 163
 164#include <asm-generic/getorder.h>
 165
 166#endif /* _SPARC64_PAGE_H */
 167