page_64.h

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