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 #include <vdso/page.h> 19 20 #define PAGE_OFFSET 0xc0000000 21 #define KERNELBASE PAGE_OFFSET 22 23 /* This is not necessarily the right place for this, but it's needed by 24 * drivers/of/fdt.c 25 */ 26 #include <asm/setup.h> 27 28 #ifndef __ASSEMBLY__ 29 30 #define clear_page(page) memset((page), 0, PAGE_SIZE) 31 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 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 /* 37 * These are used to make use of C type-checking.. 38 */ 39 typedef struct { 40 unsigned long pte; 41 } pte_t; 42 typedef struct { 43 unsigned long pgd; 44 } pgd_t; 45 typedef struct { 46 unsigned long pgprot; 47 } pgprot_t; 48 typedef struct page *pgtable_t; 49 50 #define pte_val(x) ((x).pte) 51 #define pgd_val(x) ((x).pgd) 52 #define pgprot_val(x) ((x).pgprot) 53 54 #define __pte(x) ((pte_t) { (x) }) 55 #define __pgd(x) ((pgd_t) { (x) }) 56 #define __pgprot(x) ((pgprot_t) { (x) }) 57 58 #endif /* !__ASSEMBLY__ */ 59 60 61 #ifndef __ASSEMBLY__ 62 63 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) 64 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 65 66 static inline unsigned long virt_to_pfn(const void *kaddr) 67 { 68 return __pa(kaddr) >> PAGE_SHIFT; 69 } 70 71 #define virt_to_page(addr) \ 72 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 73 74 #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) 75 76 #endif /* __ASSEMBLY__ */ 77 78 #include <asm-generic/memory_model.h> 79 #include <asm-generic/getorder.h> 80 81 #endif /* __ASM_OPENRISC_PAGE_H */ 82