projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 09cfefb7 HC |
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> | |
| e6ee9023 | 9 | #include <asm/addrspace.h> |
| 09cfefb7 HC |
10 | |
| 11 | /* | |
| 12 | * PAGE_SHIFT determines the page size | |
| 13 | */ | |
| ba89f9c8 | 14 | #define PAGE_SHIFT CONFIG_PAGE_SHIFT |
| 09cfefb7 HC |
15 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
| 16 | #define PAGE_MASK (~(PAGE_SIZE - 1)) | |
| 17 | ||
| 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) | |
| 22 | ||
| 23 | #ifndef __ASSEMBLY__ | |
| 24 | ||
| 25 | #include <linux/kernel.h> | |
| 26 | #include <linux/pfn.h> | |
| 27 | ||
| 09cfefb7 HC |
28 | /* |
| 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. | |
| 32 | */ | |
| 33 | #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) | |
| 34 | ||
| 35 | extern void clear_page(void *page); | |
| 36 | extern void copy_page(void *to, void *from); | |
| 37 | ||
| 38 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
| 39 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
| 40 | ||
| 41 | extern unsigned long shm_align_mask; | |
| 42 | ||
| 43 | struct page; | |
| 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); | |
| 47 | ||
| 48 | #define __HAVE_ARCH_COPY_USER_HIGHPAGE | |
| 49 | ||
| 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; | |
| 54 | ||
| 55 | typedef struct { unsigned long pgd; } pgd_t; | |
| 56 | #define pgd_val(x) ((x).pgd) | |
| 57 | #define __pgd(x) ((pgd_t) { (x) }) | |
| 58 | ||
| 59 | /* | |
| 60 | * Manipulate page protection bits | |
| 61 | */ | |
| 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) | |
| 66 | ||
| 67 | #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) | |
| 68 | ||
| 69 | /* | |
| 70 | * __pa()/__va() should be used only during mem init. | |
| 71 | */ | |
| 72 | #define __pa(x) PHYSADDR(x) | |
| 73 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) | |
| 74 | ||
| 75 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
| aa5e65dc | 76 | #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) |
| 09cfefb7 | 77 | |
| 092e9ebe | 78 | #define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr)) |
| 8b5cb1cb EL |
79 | |
| 80 | #define virt_to_page(kaddr) \ | |
| 81 | ({ \ | |
| 82 | (likely((unsigned long)kaddr < vm_map_base)) ? \ | |
| 83 | dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\ | |
| 84 | }) | |
| 09cfefb7 HC |
85 | |
| 86 | extern int __virt_addr_valid(volatile void *kaddr); | |
| 87 | #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) | |
| 88 | ||
| 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) | |
| 93 | ||
| 94 | #include <asm-generic/memory_model.h> | |
| 95 | #include <asm-generic/getorder.h> | |
| 96 | ||
| 97 | #endif /* !__ASSEMBLY__ */ | |
| 98 | ||
| 99 | #endif /* _ASM_PAGE_H */ |