1/* 2 * Copyright (C) 2014 Altera Corporation 3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> 4 * Copyright (C) 2004 Microtronix Datacom Ltd. 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11#ifndef _ASM_NIOS2_IO_H 12#define _ASM_NIOS2_IO_H 13 14#include <linux/types.h> 15#include <asm/pgtable-bits.h> 16 17/* PCI is not supported in nios2, set this to 0. */ 18#define IO_SPACE_LIMIT 0 19 20#define readb_relaxed(addr) readb(addr) 21#define readw_relaxed(addr) readw(addr) 22#define readl_relaxed(addr) readl(addr) 23 24#define writeb_relaxed(x, addr) writeb(x, addr) 25#define writew_relaxed(x, addr) writew(x, addr) 26#define writel_relaxed(x, addr) writel(x, addr) 27 28void __iomem *ioremap(unsigned long physaddr, unsigned long size); 29void iounmap(void __iomem *addr); 30 31/* Pages to physical address... */ 32#define page_to_phys(page) virt_to_phys(page_to_virt(page)) 33 34/* Macros used for converting between virtual and physical mappings. */ 35#define phys_to_virt(vaddr) \ 36 ((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE)) 37/* Clear top 3 bits */ 38#define virt_to_phys(vaddr) \ 39 ((unsigned long)((unsigned long)(vaddr) & ~0xE0000000)) 40 41#include <asm-generic/io.h> 42 43#endif /* _ASM_NIOS2_IO_H */ 44