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
  45 typedef struct { unsigned long pte; } pte_t;            /* page table entry */
  46 typedef struct { unsigned long pgd; } pgd_t;            /* PGD table entry */
  47 typedef struct { unsigned long pgprot; } pgprot_t;
  48 typedef 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
  58 extern unsigned long max_low_pfn;
  59 extern unsigned long min_low_pfn;
  60 extern 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 */