| Ley Foon Tan | 6b8baec | 2014-11-06 15:19:42 +0800 | [diff] [blame^] | 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 <asm/pgtable-bits.h> |
| 15 | #include <asm-generic/iomap.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 | #include <asm-generic/io.h> |
| 29 | |
| 30 | extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, |
| 31 | unsigned long cacheflag); |
| 32 | extern void __iounmap(void __iomem *addr); |
| 33 | |
| 34 | static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) |
| 35 | { |
| 36 | return __ioremap(physaddr, size, 0); |
| 37 | } |
| 38 | |
| 39 | static inline void __iomem *ioremap_nocache(unsigned long physaddr, |
| 40 | unsigned long size) |
| 41 | { |
| 42 | return __ioremap(physaddr, size, 0); |
| 43 | } |
| 44 | |
| 45 | static inline void iounmap(void __iomem *addr) |
| 46 | { |
| 47 | __iounmap(addr); |
| 48 | } |
| 49 | |
| 50 | /* Pages to physical address... */ |
| 51 | # define page_to_phys(page) virt_to_phys(page_to_virt(page)) |
| 52 | # define page_to_bus(page) page_to_virt(page) |
| 53 | |
| 54 | /* Macros used for converting between virtual and physical mappings. */ |
| 55 | # define phys_to_virt(vaddr) \ |
| 56 | ((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE)) |
| 57 | /* Clear top 3 bits */ |
| 58 | # define virt_to_phys(vaddr) \ |
| 59 | ((unsigned long)((unsigned long)(vaddr) & ~0xE0000000)) |
| 60 | |
| 61 | #endif /* _ASM_NIOS2_IO_H */ |