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 #ifdef CONFIG_PAGE_SIZE_4KB
17 #ifdef CONFIG_PAGE_SIZE_16KB
20 #ifdef CONFIG_PAGE_SIZE_64KB
23 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
24 #define PAGE_MASK (~(PAGE_SIZE - 1))
26 #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
27 #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
28 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
29 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
33 #include <linux/kernel.h>
34 #include <linux/pfn.h>
37 * It's normally defined only for FLATMEM config but it's
38 * used in our early mem init code for all memory models.
39 * So always define it.
41 #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
43 extern void clear_page(void *page);
44 extern void copy_page(void *to, void *from);
46 #define clear_user_page(page, vaddr, pg) clear_page(page)
47 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
49 extern unsigned long shm_align_mask;
52 struct vm_area_struct;
53 void copy_user_highpage(struct page *to, struct page *from,
54 unsigned long vaddr, struct vm_area_struct *vma);
56 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
58 typedef struct { unsigned long pte; } pte_t;
59 #define pte_val(x) ((x).pte)
60 #define __pte(x) ((pte_t) { (x) })
61 typedef struct page *pgtable_t;
63 typedef struct { unsigned long pgd; } pgd_t;
64 #define pgd_val(x) ((x).pgd)
65 #define __pgd(x) ((pgd_t) { (x) })
68 * Manipulate page protection bits
70 typedef struct { unsigned long pgprot; } pgprot_t;
71 #define pgprot_val(x) ((x).pgprot)
72 #define __pgprot(x) ((pgprot_t) { (x) })
73 #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK)
75 #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
78 * __pa()/__va() should be used only during mem init.
80 #define __pa(x) PHYSADDR(x)
81 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
83 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
84 #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
86 #define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr))
88 #define virt_to_page(kaddr) \
90 (likely((unsigned long)kaddr < vm_map_base)) ? \
91 dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\
94 extern int __virt_addr_valid(volatile void *kaddr);
95 #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr))
97 #define VM_DATA_DEFAULT_FLAGS \
98 (VM_READ | VM_WRITE | \
99 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
100 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
102 #include <asm-generic/memory_model.h>
103 #include <asm-generic/getorder.h>
105 #endif /* !__ASSEMBLY__ */
107 #endif /* _ASM_PAGE_H */