LXR linux/arch/score/include/asm/page.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_SCORE_PAGE_H
   3#define _ASM_SCORE_PAGE_H
   4
   5#include <linux/pfn.h>
   6#include <linux/const.h>
   7
   8/* PAGE_SHIFT determines the page size */
   9#define PAGE_SHIFT      (12)
  10#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
  11#define PAGE_MASK       (~(PAGE_SIZE-1))
  12
  13#ifdef __KERNEL__
  14
  15#ifndef __ASSEMBLY__
  16
  17#define PAGE_UP(addr)   (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
  18#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
  19
  20/* align addr on a size boundary - adjust address up/down if needed */
  21#define _ALIGN_UP(addr, size)   (((addr)+((size)-1))&(~((size)-1)))
  22#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
  23
  24/* align addr on a size boundary - adjust address up if needed */
  25#define _ALIGN(addr, size)      _ALIGN_UP(addr, size)
  26
  27/*
  28 * PAGE_OFFSET -- the first address of the first page of memory. When not
  29 * using MMU this corresponds to the first free page in physical memory (aligned
  30 * on a page boundary).
  31 */
  32#define PAGE_OFFSET             (0xA0000000UL)
  33
  34#define clear_page(pgaddr)                      memset((pgaddr), 0, PAGE_SIZE)
  35#define copy_page(to, from)                     memcpy((to), (from), PAGE_SIZE)
  36
  37#define clear_user_page(pgaddr, vaddr, page)    memset((pgaddr), 0, PAGE_SIZE)
  38#define copy_user_page(vto, vfrom, vaddr, topg) \
  39                        memcpy((vto), (vfrom), PAGE_SIZE)
  40
  41/*
  42 * These are used to make use of C type-checking..
  43 */
  44
  45typedef struct { unsigned long pte; } pte_t;            /* page table entry */
  46typedef struct { unsigned long pgd; } pgd_t;            /* PGD table entry */
  47typedef struct { unsigned long pgprot; } pgprot_t;
  48typedef struct page *pgtable_t;
  49
  50#define pte_val(x)      ((x).pte)
  51#define pgd_val(x)      ((x).pgd)
  52#define pgprot_val(x)   ((x).pgprot)
  53
  54#define __pte(x)        ((pte_t) { (x) })
  55#define __pgd(x)        ((pgd_t) { (x) })
  56#define __pgprot(x)     ((pgprot_t) { (x) })
  57
  58extern unsigned long max_low_pfn;
  59extern unsigned long min_low_pfn;
  60extern unsigned long max_pfn;
  61
  62#define __pa(x)         ((unsigned long)(x) - PAGE_OFFSET)
  63#define __va(x)         ((void *)((unsigned long) (x) + PAGE_OFFSET))
  64
  65#define phys_to_pfn(phys)       (PFN_DOWN(phys))
  66#define pfn_to_phys(pfn)        (PFN_PHYS(pfn))
  67
  68#define virt_to_pfn(vaddr)      (phys_to_pfn((__pa(vaddr))))
  69#define pfn_to_virt(pfn)        __va(pfn_to_phys((pfn)))
  70
  71#define virt_to_page(vaddr)     (pfn_to_page(virt_to_pfn(vaddr)))
  72#define page_to_virt(page)      (pfn_to_virt(page_to_pfn(page)))
  73
  74#define page_to_phys(page)      (pfn_to_phys(page_to_pfn(page)))
  75#define page_to_bus(page)       (page_to_phys(page))
  76#define phys_to_page(paddr)     (pfn_to_page(phys_to_pfn(paddr)))
  77
  78#define pfn_valid(pfn)          (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
  79
  80#define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
  81
  82#endif /* __ASSEMBLY__ */
  83
  84#define virt_addr_valid(vaddr)  (pfn_valid(virt_to_pfn(vaddr)))
  85
  86#endif /* __KERNEL__ */
  87
  88#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  89                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  90
  91#include <asm-generic/memory_model.h>
  92#include <asm-generic/getorder.h>
  93
  94#endif /* _ASM_SCORE_PAGE_H */
  95