+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_IA64_PAGE_H
-#define _ASM_IA64_PAGE_H
-/*
- * Pagetable related stuff.
- *
- * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- */
-
-#include <asm/intrinsics.h>
-#include <asm/types.h>
-
-/*
- * The top three bits of an IA64 address are its Region Number.
- * Different regions are assigned to different purposes.
- */
-#define RGN_SHIFT (61)
-#define RGN_BASE(r) (__IA64_UL_CONST(r)<<RGN_SHIFT)
-#define RGN_BITS (RGN_BASE(-1))
-
-#define RGN_KERNEL 7 /* Identity mapped region */
-#define RGN_UNCACHED 6 /* Identity mapped I/O region */
-#define RGN_GATE 5 /* Gate page, Kernel text, etc */
-#define RGN_HPAGE 4 /* For Huge TLB pages */
-
-/*
- * PAGE_SHIFT determines the actual kernel page size.
- */
-#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
-# define PAGE_SHIFT 12
-#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
-# define PAGE_SHIFT 13
-#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
-# define PAGE_SHIFT 14
-#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
-# define PAGE_SHIFT 16
-#else
-# error Unsupported page size!
-#endif
-
-#define PAGE_SIZE (__IA64_UL_CONST(1) << PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE - 1))
-
-#define PERCPU_PAGE_SHIFT 18 /* log2() of max. size of per-CPU area */
-#define PERCPU_PAGE_SIZE (__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)
-
-
-#ifdef CONFIG_HUGETLB_PAGE
-# define HPAGE_REGION_BASE RGN_BASE(RGN_HPAGE)
-# define HPAGE_SHIFT hpage_shift
-# define HPAGE_SHIFT_DEFAULT 28 /* check ia64 SDM for architecture supported size */
-# define HPAGE_SIZE (__IA64_UL_CONST(1) << HPAGE_SHIFT)
-# define HPAGE_MASK (~(HPAGE_SIZE - 1))
-
-# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-#endif /* CONFIG_HUGETLB_PAGE */
-
-#ifdef __ASSEMBLY__
-# define __pa(x) ((x) - PAGE_OFFSET)
-# define __va(x) ((x) + PAGE_OFFSET)
-#else /* !__ASSEMBLY */
-# define STRICT_MM_TYPECHECKS
-
-extern void clear_page (void *page);
-extern void copy_page (void *to, void *from);
-
-/*
- * clear_user_page() and copy_user_page() can't be inline functions because
- * flush_dcache_page() can't be defined until later...
- */
-#define clear_user_page(addr, vaddr, page) \
-do { \
- clear_page(addr); \
- flush_dcache_page(page); \
-} while (0)
-
-#define copy_user_page(to, from, vaddr, page) \
-do { \
- copy_page((to), (from)); \
- flush_dcache_page(page); \
-} while (0)
-
-
-#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
-({ \
- struct folio *folio = vma_alloc_folio( \
- GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false); \
- if (folio) \
- flush_dcache_folio(folio); \
- folio; \
-})
-
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-
-#include <asm-generic/memory_model.h>
-
-#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
-#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-
-typedef union ia64_va {
- struct {
- unsigned long off : 61; /* intra-region offset */
- unsigned long reg : 3; /* region number */
- } f;
- unsigned long l;
- void *p;
-} ia64_va;
-
-/*
- * Note: These macros depend on the fact that PAGE_OFFSET has all
- * region bits set to 1 and all other bits set to zero. They are
- * expressed in this way to ensure they result in a single "dep"
- * instruction.
- */
-#define __pa(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = 0; _v.l;})
-#define __va(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = -1; _v.p;})
-
-#define REGION_NUMBER(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg;})
-#define REGION_OFFSET(x) ({ia64_va _v; _v.l = (long) (x); _v.f.off;})
-
-#ifdef CONFIG_HUGETLB_PAGE
-# define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61) \
- | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
-# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
-extern unsigned int hpage_shift;
-#endif
-
-static __inline__ int
-get_order (unsigned long size)
-{
- long double d = size - 1;
- long order;
-
- order = ia64_getf_exp(d);
- order = order - PAGE_SHIFT - 0xffff + 1;
- if (order < 0)
- order = 0;
- return order;
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#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 pmd; } pmd_t;
-#if CONFIG_PGTABLE_LEVELS == 4
- typedef struct { unsigned long pud; } pud_t;
-#endif
- typedef struct { unsigned long pgd; } pgd_t;
- typedef struct { unsigned long pgprot; } pgprot_t;
- typedef struct page *pgtable_t;
-
-# define pte_val(x) ((x).pte)
-# define pmd_val(x) ((x).pmd)
-#if CONFIG_PGTABLE_LEVELS == 4
-# define pud_val(x) ((x).pud)
-#endif
-# define pgd_val(x) ((x).pgd)
-# define pgprot_val(x) ((x).pgprot)
-
-# define __pte(x) ((pte_t) { (x) } )
-# define __pmd(x) ((pmd_t) { (x) } )
-# define __pgprot(x) ((pgprot_t) { (x) } )
-
-#else /* !STRICT_MM_TYPECHECKS */
- /*
- * .. while these make it easier on the compiler
- */
-# ifndef __ASSEMBLY__
- typedef unsigned long pte_t;
- typedef unsigned long pmd_t;
- typedef unsigned long pgd_t;
- typedef unsigned long pgprot_t;
- typedef struct page *pgtable_t;
-# endif
-
-# define pte_val(x) (x)
-# define pmd_val(x) (x)
-# define pgd_val(x) (x)
-# define pgprot_val(x) (x)
-
-# define __pte(x) (x)
-# define __pgd(x) (x)
-# define __pgprot(x) (x)
-#endif /* !STRICT_MM_TYPECHECKS */
-
-#define PAGE_OFFSET RGN_BASE(RGN_KERNEL)
-
-#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
-
-#define GATE_ADDR RGN_BASE(RGN_GATE)
-
-/*
- * 0xa000000000000000+2*PERCPU_PAGE_SIZE
- * - 0xa000000000000000+3*PERCPU_PAGE_SIZE remain unmapped (guard page)
- */
-#define KERNEL_START (GATE_ADDR+__IA64_UL_CONST(0x100000000))
-#define PERCPU_ADDR (-PERCPU_PAGE_SIZE)
-#define LOAD_OFFSET (KERNEL_START - KERNEL_TR_PAGE_SIZE)
-
-#define __HAVE_ARCH_GATE_AREA 1
-
-#endif /* _ASM_IA64_PAGE_H */
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