1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * OpenRISC Linux 4 * 5 * Linux architectural port borrowing liberally from similar works of 6 * others. All original copyrights apply as per the original source 7 * declaration. 8 * 9 * OpenRISC implementation: 10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 12 * et al. 13 */ 14 15 #ifndef __ASM_OPENRISC_PAGE_H 16 #define __ASM_OPENRISC_PAGE_H 17 18 19 /* PAGE_SHIFT determines the page size */ 20 21 #define PAGE_SHIFT 13 22 #ifdef __ASSEMBLY__ 23 #define PAGE_SIZE (1 << PAGE_SHIFT) 24 #else 25 #define PAGE_SIZE (1UL << PAGE_SHIFT) 26 #endif 27 #define PAGE_MASK (~(PAGE_SIZE-1)) 28 29 #define PAGE_OFFSET 0xc0000000 30 #define KERNELBASE PAGE_OFFSET 31 32 /* This is not necessarily the right place for this, but it's needed by 33 * drivers/of/fdt.c 34 */ 35 #include <asm/setup.h> 36 37 #ifndef __ASSEMBLY__ 38 39 #define clear_page(page) memset((page), 0, PAGE_SIZE) 40 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 41 42 #define clear_user_page(page, vaddr, pg) clear_page(page) 43 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 44 45 /* 46 * These are used to make use of C type-checking.. 47 */ 48 typedef struct { 49 unsigned long pte; 50 } pte_t; 51 typedef struct { 52 unsigned long pgd; 53 } pgd_t; 54 typedef struct { 55 unsigned long pgprot; 56 } pgprot_t; 57 typedef struct page *pgtable_t; 58 59 #define pte_val(x) ((x).pte) 60 #define pgd_val(x) ((x).pgd) 61 #define pgprot_val(x) ((x).pgprot) 62 63 #define __pte(x) ((pte_t) { (x) }) 64 #define __pgd(x) ((pgd_t) { (x) }) 65 #define __pgprot(x) ((pgprot_t) { (x) }) 66 67 #endif /* !__ASSEMBLY__ */ 68 69 70 #ifndef __ASSEMBLY__ 71 72 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) 73 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 74 75 static inline unsigned long virt_to_pfn(const void *kaddr) 76 { 77 return __pa(kaddr) >> PAGE_SHIFT; 78 } 79 80 static inline void * pfn_to_virt(unsigned long pfn) 81 { 82 return (void *)((unsigned long)__va(pfn) << PAGE_SHIFT); 83 } 84 85 #define virt_to_page(addr) \ 86 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 87 88 #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) 89 90 #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) 91 92 #endif /* __ASSEMBLY__ */ 93 94 #include <asm-generic/memory_model.h> 95 #include <asm-generic/getorder.h> 96 97 #endif /* __ASM_OPENRISC_PAGE_H */ 98