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/*
* 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)
extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
unsigned long cacheflag);
extern void __iounmap(void __iomem *addr);
static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
{
return __ioremap(physaddr, size, 0);
}
static inline void __iomem *ioremap_nocache(unsigned long physaddr,
unsigned long size)
{
return __ioremap(physaddr, size, 0);
}
static inline void iounmap(void __iomem *addr)
{
__iounmap(addr);
}
#define ioremap_wc ioremap_nocache
#define ioremap_wt ioremap_nocache
/* Pages to physical address... */
#define page_to_phys(page) virt_to_phys(page_to_virt(page))
#define page_to_bus(page) 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 */