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Diffstat (limited to 'arch/nios2/include/asm/io.h')
| -rw-r--r-- | arch/nios2/include/asm/io.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h new file mode 100644 index 0000000000..746853ac7d --- /dev/null +++ b/arch/nios2/include/asm/io.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2014 Altera Corporation + * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> + * Copyright (C) 2004 Microtronix Datacom Ltd. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _ASM_NIOS2_IO_H +#define _ASM_NIOS2_IO_H + +#include <linux/types.h> +#include <asm/pgtable-bits.h> + +/* PCI is not supported in nios2, set this to 0. */ +#define IO_SPACE_LIMIT 0 + +#define readb_relaxed(addr) readb(addr) +#define readw_relaxed(addr) readw(addr) +#define readl_relaxed(addr) readl(addr) + +#define writeb_relaxed(x, addr) writeb(x, addr) +#define writew_relaxed(x, addr) writew(x, addr) +#define writel_relaxed(x, addr) writel(x, addr) + +void __iomem *ioremap(unsigned long physaddr, unsigned long size); +void iounmap(void __iomem *addr); + +/* Pages to physical address... */ +#define page_to_phys(page) virt_to_phys(page_to_virt(page)) + +/* Macros used for converting between virtual and physical mappings. */ +#define phys_to_virt(vaddr) \ + ((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE)) +/* Clear top 3 bits */ +#define virt_to_phys(vaddr) \ + ((unsigned long)((unsigned long)(vaddr) & ~0xE0000000)) + +#include <asm-generic/io.h> + +#endif /* _ASM_NIOS2_IO_H */ |