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 28 void __iomem *ioremap(unsigned long physaddr, unsigned long size); 29 void 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