| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * OpenRISC Linux |
| * |
| * Linux architectural port borrowing liberally from similar works of |
| * others. All original copyrights apply as per the original source |
| * declaration. |
| * |
| * OpenRISC implementation: |
| * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> |
| * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> |
| * et al. |
| */ |
| |
| #ifndef __ASM_OPENRISC_PAGE_H |
| #define __ASM_OPENRISC_PAGE_H |
| |
| |
| /* PAGE_SHIFT determines the page size */ |
| |
| #define PAGE_SHIFT 13 |
| #ifdef __ASSEMBLY__ |
| #define PAGE_SIZE (1 << PAGE_SHIFT) |
| #else |
| #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| #endif |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #define PAGE_OFFSET 0xc0000000 |
| #define KERNELBASE PAGE_OFFSET |
| |
| /* This is not necessarily the right place for this, but it's needed by |
| * drivers/of/fdt.c |
| */ |
| #include <asm/setup.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define clear_page(page) memset((page), 0, PAGE_SIZE) |
| #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
| |
| #define clear_user_page(page, vaddr, pg) clear_page(page) |
| #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef struct { |
| unsigned long pte; |
| } pte_t; |
| typedef struct { |
| unsigned long pgd; |
| } pgd_t; |
| typedef struct { |
| unsigned long pgprot; |
| } pgprot_t; |
| typedef struct page *pgtable_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define pgd_val(x) ((x).pgd) |
| #define pgprot_val(x) ((x).pgprot) |
| |
| #define __pte(x) ((pte_t) { (x) }) |
| #define __pgd(x) ((pgd_t) { (x) }) |
| #define __pgprot(x) ((pgprot_t) { (x) }) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) |
| #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) |
| |
| #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
| #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
| |
| #define virt_to_page(addr) \ |
| (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) |
| |
| #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) |
| |
| #define pfn_valid(pfn) ((pfn) < max_mapnr) |
| |
| #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* __ASM_OPENRISC_PAGE_H */ |