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 40 typedef struct { unsigned long pte; } pte_t; 41 #define pte_val(x) ((x).pte) 42 #define __pte(x) ((pte_t) { (x) }) 43 typedef struct page *pgtable_t; 44 45 typedef struct { unsigned long pgd; } pgd_t; 46 #define pgd_val(x) ((x).pgd) 47 #define __pgd(x) ((pgd_t) { (x) }) 48 49 /* 50 * Manipulate page protection bits 51 */ 52 typedef struct { unsigned long pgprot; } pgprot_t; 53 #define pgprot_val(x) ((x).pgprot) 54 #define __pgprot(x) ((pgprot_t) { (x) }) 55 #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) 56 57 #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) 58 59 /* 60 * __pa()/__va() should be used only during mem init. 61 */ 62 #define __pa(x) PHYSADDR(x) 63 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) 64 65 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 66 #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) 67 68 struct page *dmw_virt_to_page(unsigned long kaddr); 69 struct page *tlb_virt_to_page(unsigned long kaddr); 70 71 #define pfn_to_phys(pfn) __pfn_to_phys(pfn) 72 #define phys_to_pfn(paddr) __phys_to_pfn(paddr) 73 74 #ifndef CONFIG_KFENCE 75 76 #define page_to_virt(page) __va(page_to_phys(page)) 77 #define virt_to_page(kaddr) phys_to_page(__pa(kaddr)) 78 79 #else 80 81 #define WANT_PAGE_VIRTUAL 82 83 #define page_to_virt(page) \ 84 ({ \ 85 extern char *__kfence_pool; \ 86 (__kfence_pool == NULL) ? __va(page_to_phys(page)) : page_address(page); \ 87 }) 88 89 #define virt_to_page(kaddr) \ 90 ({ \ 91 (likely((unsigned long)kaddr < vm_map_base)) ? \ 92 dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\ 93 }) 94 95 #endif 96 97 #define pfn_to_virt(pfn) page_to_virt(pfn_to_page(pfn)) 98 #define virt_to_pfn(kaddr) page_to_pfn(virt_to_page(kaddr)) 99 100 extern int __virt_addr_valid(volatile void *kaddr); 101 #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) 102 103 #define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC 104 105 #include <asm-generic/memory_model.h> 106 #include <asm-generic/getorder.h> 107 108 #endif /* !__ASSEMBLER__ */ 109 110 #endif /* _ASM_PAGE_H */ 111