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| 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 clear_user_page(page, vaddr, pg) clear_page(page) |
| 34 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| 35 | |
| 36 | extern unsigned long shm_align_mask; |
| 37 | |
| 38 | struct page; |
| 39 | struct vm_area_struct; |
| 40 | void copy_user_highpage(struct page *to, struct page *from, |
| 41 | unsigned long vaddr, struct vm_area_struct *vma); |
| 42 | |
| 43 | #define __HAVE_ARCH_COPY_USER_HIGHPAGE |
| 44 | |
| 45 | typedef struct { unsigned long pte; } pte_t; |
| 46 | #define pte_val(x) ((x).pte) |
| 47 | #define __pte(x) ((pte_t) { (x) }) |
| 48 | typedef struct page *pgtable_t; |
| 49 | |
| 50 | typedef struct { unsigned long pgd; } pgd_t; |
| 51 | #define pgd_val(x) ((x).pgd) |
| 52 | #define __pgd(x) ((pgd_t) { (x) }) |
| 53 | |
| 54 | /* |
| 55 | * Manipulate page protection bits |
| 56 | */ |
| 57 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 58 | #define pgprot_val(x) ((x).pgprot) |
| 59 | #define __pgprot(x) ((pgprot_t) { (x) }) |
| 60 | #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) |
| 61 | |
| 62 | #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) |
| 63 | |
| 64 | /* |
| 65 | * __pa()/__va() should be used only during mem init. |
| 66 | */ |
| 67 | #define __pa(x) PHYSADDR(x) |
| 68 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) |
| 69 | |
| 70 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
| 71 | #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) |
| 72 | |
| 73 | struct page *dmw_virt_to_page(unsigned long kaddr); |
| 74 | struct page *tlb_virt_to_page(unsigned long kaddr); |
| 75 | |
| 76 | #define pfn_to_phys(pfn) __pfn_to_phys(pfn) |
| 77 | #define phys_to_pfn(paddr) __phys_to_pfn(paddr) |
| 78 | |
| 79 | #ifndef CONFIG_KFENCE |
| 80 | |
| 81 | #define page_to_virt(page) __va(page_to_phys(page)) |
| 82 | #define virt_to_page(kaddr) phys_to_page(__pa(kaddr)) |
| 83 | |
| 84 | #else |
| 85 | |
| 86 | #define WANT_PAGE_VIRTUAL |
| 87 | |
| 88 | #define page_to_virt(page) \ |
| 89 | ({ \ |
| 90 | extern char *__kfence_pool; \ |
| 91 | (__kfence_pool == NULL) ? __va(page_to_phys(page)) : page_address(page); \ |
| 92 | }) |
| 93 | |
| 94 | #define virt_to_page(kaddr) \ |
| 95 | ({ \ |
| 96 | (likely((unsigned long)kaddr < vm_map_base)) ? \ |
| 97 | dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\ |
| 98 | }) |
| 99 | |
| 100 | #endif |
| 101 | |
| 102 | #define pfn_to_virt(pfn) page_to_virt(pfn_to_page(pfn)) |
| 103 | #define virt_to_pfn(kaddr) page_to_pfn(virt_to_page(kaddr)) |
| 104 | |
| 105 | extern int __virt_addr_valid(volatile void *kaddr); |
| 106 | #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) |
| 107 | |
| 108 | #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC |
| 109 | |
| 110 | #include <asm-generic/memory_model.h> |
| 111 | #include <asm-generic/getorder.h> |
| 112 | |
| 113 | #endif /* !__ASSEMBLER__ */ |
| 114 | |
| 115 | #endif /* _ASM_PAGE_H */ |
| 116 |
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