include/asm/page_64.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _SPARC64_PAGE_H
0003 #define _SPARC64_PAGE_H
0004
0005 #include <linux/const.h>
0006
0007 #define PAGE_SHIFT   13
0008
0009 #define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
0010 #define PAGE_MASK    (~(PAGE_SIZE-1))
0011
0012 /* Flushing for D-cache alias handling is only needed if
0013  * the page size is smaller than 16K.
0014  */
0015 #if PAGE_SHIFT < 14
0016 #define DCACHE_ALIASING_POSSIBLE
0017 #endif
0018
0019 #define HPAGE_SHIFT     23
0020 #define REAL_HPAGE_SHIFT    22
0021 #define HPAGE_16GB_SHIFT    34
0022 #define HPAGE_2GB_SHIFT     31
0023 #define HPAGE_256MB_SHIFT   28
0024 #define HPAGE_64K_SHIFT     16
0025 #define REAL_HPAGE_SIZE     (_AC(1,UL) << REAL_HPAGE_SHIFT)
0026
0027 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
0028 #define HPAGE_SIZE      (_AC(1,UL) << HPAGE_SHIFT)
0029 #define HPAGE_MASK      (~(HPAGE_SIZE - 1UL))
0030 #define HUGETLB_PAGE_ORDER  (HPAGE_SHIFT - PAGE_SHIFT)
0031 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
0032 #define REAL_HPAGE_PER_HPAGE    (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
0033 #define HUGE_MAX_HSTATE     5
0034 #endif
0035
0036 #ifndef __ASSEMBLY__
0037
0038 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
0039 struct pt_regs;
0040 void hugetlb_setup(struct pt_regs *regs);
0041 #endif
0042
0043 #define WANT_PAGE_VIRTUAL
0044
0045 void _clear_page(void *page);
0046 #define clear_page(X)   _clear_page((void *)(X))
0047 struct page;
0048 void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
0049 #define copy_page(X,Y)  memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
0050 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
0051 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
0052 struct vm_area_struct;
0053 void copy_user_highpage(struct page *to, struct page *from,
0054             unsigned long vaddr, struct vm_area_struct *vma);
0055 #define __HAVE_ARCH_COPY_HIGHPAGE
0056 void copy_highpage(struct page *to, struct page *from);
0057
0058 /* Unlike sparc32, sparc64's parameter passing API is more
0059  * sane in that structures which as small enough are passed
0060  * in registers instead of on the stack.  Thus, setting
0061  * STRICT_MM_TYPECHECKS does not generate worse code so
0062  * let's enable it to get the type checking.
0063  */
0064
0065 #define STRICT_MM_TYPECHECKS
0066
0067 #ifdef STRICT_MM_TYPECHECKS
0068 /* These are used to make use of C type-checking.. */
0069 typedef struct { unsigned long pte; } pte_t;
0070 typedef struct { unsigned long iopte; } iopte_t;
0071 typedef struct { unsigned long pmd; } pmd_t;
0072 typedef struct { unsigned long pud; } pud_t;
0073 typedef struct { unsigned long pgd; } pgd_t;
0074 typedef struct { unsigned long pgprot; } pgprot_t;
0075
0076 #define pte_val(x)  ((x).pte)
0077 #define iopte_val(x)    ((x).iopte)
0078 #define pmd_val(x)      ((x).pmd)
0079 #define pud_val(x)      ((x).pud)
0080 #define pgd_val(x)  ((x).pgd)
0081 #define pgprot_val(x)   ((x).pgprot)
0082
0083 #define __pte(x)    ((pte_t) { (x) } )
0084 #define __iopte(x)  ((iopte_t) { (x) } )
0085 #define __pmd(x)        ((pmd_t) { (x) } )
0086 #define __pud(x)        ((pud_t) { (x) } )
0087 #define __pgd(x)    ((pgd_t) { (x) } )
0088 #define __pgprot(x) ((pgprot_t) { (x) } )
0089
0090 #else
0091 /* .. while these make it easier on the compiler */
0092 typedef unsigned long pte_t;
0093 typedef unsigned long iopte_t;
0094 typedef unsigned long pmd_t;
0095 typedef unsigned long pud_t;
0096 typedef unsigned long pgd_t;
0097 typedef unsigned long pgprot_t;
0098
0099 #define pte_val(x)  (x)
0100 #define iopte_val(x)    (x)
0101 #define pmd_val(x)      (x)
0102 #define pud_val(x)      (x)
0103 #define pgd_val(x)  (x)
0104 #define pgprot_val(x)   (x)
0105
0106 #define __pte(x)    (x)
0107 #define __iopte(x)  (x)
0108 #define __pmd(x)        (x)
0109 #define __pud(x)        (x)
0110 #define __pgd(x)    (x)
0111 #define __pgprot(x) (x)
0112
0113 #endif /* (STRICT_MM_TYPECHECKS) */
0114
0115 typedef pte_t *pgtable_t;
0116
0117 extern unsigned long sparc64_va_hole_top;
0118 extern unsigned long sparc64_va_hole_bottom;
0119
0120 /* The next two defines specify the actual exclusion region we
0121  * enforce, wherein we use a 4GB red zone on each side of the VA hole.
0122  */
0123 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
0124 #define VA_EXCLUDE_END   (sparc64_va_hole_top + (1UL << 32UL))
0125
0126 #define TASK_UNMAPPED_BASE  (test_thread_flag(TIF_32BIT) ? \
0127                  _AC(0x0000000070000000,UL) : \
0128                  VA_EXCLUDE_END)
0129
0130 #include <asm-generic/memory_model.h>
0131
0132 extern unsigned long PAGE_OFFSET;
0133
0134 #endif /* !(__ASSEMBLY__) */
0135
0136 /* The maximum number of physical memory address bits we support.  The
0137  * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
0138  * evaluates to.
0139  */
0140 #define MAX_PHYS_ADDRESS_BITS   53
0141
0142 #define ILOG2_4MB       22
0143 #define ILOG2_256MB     28
0144
0145 #ifndef __ASSEMBLY__
0146
0147 #define __pa(x)         ((unsigned long)(x) - PAGE_OFFSET)
0148 #define __va(x)         ((void *)((unsigned long) (x) + PAGE_OFFSET))
0149
0150 #define pfn_to_kaddr(pfn)   __va((pfn) << PAGE_SHIFT)
0151
0152 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
0153
0154 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
0155
0156 #define virt_to_phys __pa
0157 #define phys_to_virt __va
0158
0159 #endif /* !(__ASSEMBLY__) */
0160
0161 #include <asm-generic/getorder.h>
0162
0163 #endif /* _SPARC64_PAGE_H */