projects / mirror_ubuntu-disco-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | #ifndef _ASM_PAGE_H |
| 3 | #define _ASM_PAGE_H | |
| 4 | ||
| 1da177e4 LT |
5 | #include <asm/virtconvert.h> |
| 6 | #include <asm/mem-layout.h> | |
| 7 | #include <asm/sections.h> | |
| 8 | #include <asm/setup.h> | |
| 9 | ||
| 10 | #ifndef __ASSEMBLY__ | |
| 11 | ||
| 1da177e4 LT |
12 | #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) |
| 13 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
| 14 | ||
| 15 | #define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) | |
| 16 | #define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE) | |
| 17 | ||
| 18 | /* | |
| 19 | * These are used to make use of C type-checking.. | |
| 20 | */ | |
| 21 | typedef struct { unsigned long pte; } pte_t; | |
| 22 | typedef struct { unsigned long ste[64];} pmd_t; | |
| 23 | typedef struct { pmd_t pue[1]; } pud_t; | |
| 24 | typedef struct { pud_t pge[1]; } pgd_t; | |
| 25 | typedef struct { unsigned long pgprot; } pgprot_t; | |
| 2f569afd | 26 | typedef struct page *pgtable_t; |
| 1da177e4 LT |
27 | |
| 28 | #define pte_val(x) ((x).pte) | |
| 29 | #define pmd_val(x) ((x).ste[0]) | |
| 30 | #define pud_val(x) ((x).pue[0]) | |
| 31 | #define pgd_val(x) ((x).pge[0]) | |
| 32 | #define pgprot_val(x) ((x).pgprot) | |
| 33 | ||
| 34 | #define __pte(x) ((pte_t) { (x) } ) | |
| 6d8113c7 | 35 | #define __pmd(x) ((pmd_t) { { (x) } } ) |
| 1da177e4 LT |
36 | #define __pud(x) ((pud_t) { (x) } ) |
| 37 | #define __pgd(x) ((pgd_t) { (x) } ) | |
| 38 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
| 39 | #define PTE_MASK PAGE_MASK | |
| 40 | ||
| 1da177e4 LT |
41 | #define devmem_is_allowed(pfn) 1 |
| 42 | ||
| 8080f231 DH |
43 | #define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr)) |
| 44 | #define __va(paddr) phys_to_virt((unsigned long) (paddr)) | |
| 1da177e4 LT |
45 | |
| 46 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
| 47 | ||
| 48 | extern unsigned long max_low_pfn; | |
| 49 | extern unsigned long min_low_pfn; | |
| 50 | extern unsigned long max_pfn; | |
| 51 | ||
| 52 | #ifdef CONFIG_MMU | |
| 1da177e4 | 53 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
| 1da177e4 | 54 | #else |
| 5cdac7ca | 55 | #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
| 1da177e4 LT |
56 | #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) |
| 57 | ||
| 58 | #endif | |
| 59 | ||
| 60 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
| 61 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
| 62 | ||
| 63 | ||
| 1da177e4 LT |
64 | #define VM_DATA_DEFAULT_FLAGS \ |
| 65 | (VM_READ | VM_WRITE | \ | |
| 66 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
| 67 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 1da177e4 LT |
68 | |
| 69 | #endif /* __ASSEMBLY__ */ | |
| 70 | ||
| 5cdac7ca | 71 | #include <asm-generic/memory_model.h> |
| 5b17e1cd | 72 | #include <asm-generic/getorder.h> |
| fd4fd5aa | 73 | |
| 1da177e4 | 74 | #endif /* _ASM_PAGE_H */ |