1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
8 #include <linux/const.h>
9 #include <asm/addrspace.h>
12 * PAGE_SHIFT determines the page size
14 #define PAGE_SHIFT CONFIG_PAGE_SHIFT
15 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
16 #define PAGE_MASK (~(PAGE_SIZE - 1))
18 #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
19 #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
20 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
21 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
25 #include <linux/kernel.h>
26 #include <linux/pfn.h>
29 * It's normally defined only for FLATMEM config but it's
30 * used in our early mem init code for all memory models.
31 * So always define it.
33 #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
35 extern void clear_page(void *page);
36 extern void copy_page(void *to, void *from);
38 #define clear_user_page(page, vaddr, pg) clear_page(page)
39 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
41 extern unsigned long shm_align_mask;
44 struct vm_area_struct;
45 void copy_user_highpage(struct page *to, struct page *from,
46 unsigned long vaddr, struct vm_area_struct *vma);
48 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
50 typedef struct { unsigned long pte; } pte_t;
51 #define pte_val(x) ((x).pte)
52 #define __pte(x) ((pte_t) { (x) })
53 typedef struct page *pgtable_t;
55 typedef struct { unsigned long pgd; } pgd_t;
56 #define pgd_val(x) ((x).pgd)
57 #define __pgd(x) ((pgd_t) { (x) })
60 * Manipulate page protection bits
62 typedef struct { unsigned long pgprot; } pgprot_t;
63 #define pgprot_val(x) ((x).pgprot)
64 #define __pgprot(x) ((pgprot_t) { (x) })
65 #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK)
67 #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
70 * __pa()/__va() should be used only during mem init.
72 #define __pa(x) PHYSADDR(x)
73 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
75 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
76 #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
78 #define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr))
80 #define virt_to_page(kaddr) \
82 (likely((unsigned long)kaddr < vm_map_base)) ? \
83 dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\
86 extern int __virt_addr_valid(volatile void *kaddr);
87 #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr))
89 #define VM_DATA_DEFAULT_FLAGS \
90 (VM_READ | VM_WRITE | \
91 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
92 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
94 #include <asm-generic/memory_model.h>
95 #include <asm-generic/getorder.h>
97 #endif /* !__ASSEMBLY__ */
99 #endif /* _ASM_PAGE_H */