1 files changed, 163 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h
new file mode 100644
index 000000000..254dffd85
--- /dev/null
+++ b/arch/sparc/include/asm/page_64.h
@@ -0,0 +1,163 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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		23
+#define REAL_HPAGE_SHIFT	22
+#define HPAGE_16GB_SHIFT	34
+#define HPAGE_2GB_SHIFT		31
+#define HPAGE_256MB_SHIFT	28
+#define HPAGE_64K_SHIFT		16
+#define REAL_HPAGE_SIZE		(_AC(1,UL) << REAL_HPAGE_SHIFT)
+
+#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
+#define REAL_HPAGE_PER_HPAGE	(_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
+#define HUGE_MAX_HSTATE		5
+#endif
+
+#ifndef __ASSEMBLY__
+
+#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
+struct pt_regs;
+void hugetlb_setup(struct pt_regs *regs);
+#endif
+
+#define WANT_PAGE_VIRTUAL
+
+void _clear_page(void *page);
+#define clear_page(X)	_clear_page((void *)(X))
+struct page;
+void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
+#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
+void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+struct vm_area_struct;
+void copy_user_highpage(struct page *to, struct page *from,
+			unsigned long vaddr, struct vm_area_struct *vma);
+#define __HAVE_ARCH_COPY_HIGHPAGE
+void copy_highpage(struct page *to, struct page *from);
+
+/* 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 long pmd; } pmd_t;
+typedef struct { unsigned long pud; } pud_t;
+typedef struct { unsigned long 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 pud_val(x)      ((x).pud)
+#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 __pud(x)        ((pud_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 long pmd_t;
+typedef unsigned long pud_t;
+typedef unsigned long pgd_t;
+typedef unsigned long pgprot_t;
+
+#define pte_val(x)	(x)
+#define iopte_val(x)	(x)
+#define pmd_val(x)      (x)
+#define pud_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 __pud(x)        (x)
+#define __pgd(x)	(x)
+#define __pgprot(x)	(x)
+
+#endif /* (STRICT_MM_TYPECHECKS) */
+
+typedef pte_t *pgtable_t;
+
+extern unsigned long sparc64_va_hole_top;
+extern unsigned long sparc64_va_hole_bottom;
+
+/* 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 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>
+
+extern unsigned long PAGE_OFFSET;
+
+#endif /* !(__ASSEMBLY__) */
+
+/* The maximum number of physical memory address bits we support.  The
+ * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
+ * evaluates to.
+ */
+#define MAX_PHYS_ADDRESS_BITS	53
+
+#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__) */
+
+#include <asm-generic/getorder.h>
+
+#endif /* _SPARC64_PAGE_H */