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 extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, 29 unsigned long cacheflag); 30 extern void __iounmap(void __iomem *addr); 31 32 static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) 33 { 34 return __ioremap(physaddr, size, 0); 35 } 36 37 static inline void __iomem *ioremap_nocache(unsigned long physaddr, 38 unsigned long size) 39 { 40 return __ioremap(physaddr, size, 0); 41 } 42 43 static inline void iounmap(void __iomem *addr) 44 { 45 __iounmap(addr); 46 } 47 48 #define ioremap_wc ioremap_nocache 49 #define ioremap_wt ioremap_nocache 50 51 /* Pages to physical address... */ 52 #define page_to_phys(page) virt_to_phys(page_to_virt(page)) 53 #define page_to_bus(page) page_to_virt(page) 54 55 /* Macros used for converting between virtual and physical mappings. */ 56 #define phys_to_virt(vaddr) \ 57 ((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE)) 58 /* Clear top 3 bits */ 59 #define virt_to_phys(vaddr) \ 60 ((unsigned long)((unsigned long)(vaddr) & ~0xE0000000)) 61 62 #include <asm-generic/io.h> 63 64 #endif /* _ASM_NIOS2_IO_H */ 65