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6b8baec4d6
This patch adds several definitions for I/O accessors and ioremap(). Signed-off-by: Ley Foon Tan <lftan@altera.com>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* Copyright (C) 2014 Altera Corporation
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* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
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* Copyright (C) 2004 Microtronix Datacom Ltd.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_NIOS2_IO_H
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#define _ASM_NIOS2_IO_H
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#include <asm/pgtable-bits.h>
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#include <asm-generic/iomap.h>
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/* PCI is not supported in nios2, set this to 0. */
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#define IO_SPACE_LIMIT 0
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#define readb_relaxed(addr) readb(addr)
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#define readw_relaxed(addr) readw(addr)
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#define readl_relaxed(addr) readl(addr)
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#define writeb_relaxed(x, addr) writeb(x, addr)
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#define writew_relaxed(x, addr) writew(x, addr)
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#define writel_relaxed(x, addr) writel(x, addr)
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#include <asm-generic/io.h>
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extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
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unsigned long cacheflag);
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extern void __iounmap(void __iomem *addr);
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static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
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{
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return __ioremap(physaddr, size, 0);
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}
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static inline void __iomem *ioremap_nocache(unsigned long physaddr,
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unsigned long size)
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{
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return __ioremap(physaddr, size, 0);
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}
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static inline void iounmap(void __iomem *addr)
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{
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__iounmap(addr);
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}
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/* Pages to physical address... */
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# define page_to_phys(page) virt_to_phys(page_to_virt(page))
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# define page_to_bus(page) page_to_virt(page)
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/* Macros used for converting between virtual and physical mappings. */
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# define phys_to_virt(vaddr) \
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((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE))
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/* Clear top 3 bits */
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# define virt_to_phys(vaddr) \
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((unsigned long)((unsigned long)(vaddr) & ~0xE0000000))
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#endif /* _ASM_NIOS2_IO_H */
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