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556269c138
Add ioremap_wt() to all arch-specific asm/io.h headers which define ioremap_wc() locally. These headers do not include <asm-generic/iomap.h>. Some of them include <asm-generic/io.h>, but ioremap_wt() is defined for consistency since they define all ioremap_xxx locally. In all architectures without Write-Through support, ioremap_wt() is defined indentical to ioremap_nocache(). frv and m68k already have ioremap_writethrough(). On those we add ioremap_wt() indetical to ioremap_writethrough() and defines ARCH_HAS_IOREMAP_WT in both architectures. The ioremap_wt() interface is exported to drivers. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Elliott@hp.com Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: arnd@arndb.de Cc: hch@lst.de Cc: hmh@hmh.eng.br Cc: jgross@suse.com Cc: konrad.wilk@oracle.com Cc: linux-mm <linux-mm@kvack.org> Cc: linux-nvdimm@lists.01.org Cc: stefan.bader@canonical.com Cc: yigal@plexistor.com Link: http://lkml.kernel.org/r/1433436928-31903-9-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
65 lines
1.8 KiB
C
65 lines
1.8 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 <linux/types.h>
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#include <asm/pgtable-bits.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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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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#define ioremap_wc ioremap_nocache
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#define ioremap_wt ioremap_nocache
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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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#include <asm-generic/io.h>
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#endif /* _ASM_NIOS2_IO_H */
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