1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef _ASM_PAGE_H 6 #define _ASM_PAGE_H 7 8 #include <linux/const.h> 9 #include <asm/addrspace.h> 10 11 #include <vdso/page.h> 12 13 #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - PTRLOG) 14 #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) 15 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 16 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 17 18 #ifndef __ASSEMBLER__ 19 20 #include <linux/kernel.h> 21 #include <linux/pfn.h> 22 23 /* 24 * It's normally defined only for FLATMEM config but it's 25 * used in our early mem init code for all memory models. 26 * So always define it. 27 */ 28 #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) 29 30 extern void clear_page(void *page); 31 extern void copy_page(void *to, void *from); 32 33 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 34 35 extern unsigned long shm_align_mask; 36 37 struct page; 38 struct vm_area_struct; 39 void copy_user_highpage(struct page *to, struct page *from, 40 unsigned long vaddr, struct vm_area_struct *vma); 41 42 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 43 44 typedef struct { unsigned long pte; } pte_t; 45 #define pte_val(x) ((x).pte) 46 #define __pte(x) ((pte_t) { (x) }) 47 typedef struct page *pgtable_t; 48 49 typedef struct { unsigned long pgd; } pgd_t; 50 #define pgd_val(x) ((x).pgd) 51 #define __pgd(x) ((pgd_t) { (x) }) 52 53 /* 54 * Manipulate page protection bits 55 */ 56 typedef struct { unsigned long pgprot; } pgprot_t; 57 #define pgprot_val(x) ((x).pgprot) 58 #define __pgprot(x) ((pgprot_t) { (x) }) 59 #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) 60 61 #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) 62 63 /* 64 * __pa()/__va() should be used only during mem init. 65 */ 66 #define __pa(x) PHYSADDR(x) 67 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) 68 69 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 70 #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) 71 72 struct page *dmw_virt_to_page(unsigned long kaddr); 73 struct page *tlb_virt_to_page(unsigned long kaddr); 74 75 #define pfn_to_phys(pfn) __pfn_to_phys(pfn) 76 #define phys_to_pfn(paddr) __phys_to_pfn(paddr) 77 78 #ifndef CONFIG_KFENCE 79 80 #define page_to_virt(page) __va(page_to_phys(page)) 81 #define virt_to_page(kaddr) phys_to_page(__pa(kaddr)) 82 83 #else 84 85 #define WANT_PAGE_VIRTUAL 86 87 #define page_to_virt(page) \ 88 ({ \ 89 extern char *__kfence_pool; \ 90 (__kfence_pool == NULL) ? __va(page_to_phys(page)) : page_address(page); \ 91 }) 92 93 #define virt_to_page(kaddr) \ 94 ({ \ 95 (likely((unsigned long)kaddr < vm_map_base)) ? \ 96 dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\ 97 }) 98 99 #endif 100 101 #define pfn_to_virt(pfn) page_to_virt(pfn_to_page(pfn)) 102 #define virt_to_pfn(kaddr) page_to_pfn(virt_to_page(kaddr)) 103 104 extern int __virt_addr_valid(volatile void *kaddr); 105 #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) 106 107 #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC 108 109 #include <asm-generic/memory_model.h> 110 #include <asm-generic/getorder.h> 111 112 #endif /* !__ASSEMBLER__ */ 113 114 #endif /* _ASM_PAGE_H */ 115