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>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
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* include/asm-xtensa/io.h
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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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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_IO_H
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#define _XTENSA_IO_H
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#ifdef __KERNEL__
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <asm/vectors.h>
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#include <linux/bug.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
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#define IO_SPACE_LIMIT ~0
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#ifdef CONFIG_MMU
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#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
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extern unsigned long xtensa_kio_paddr;
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static inline unsigned long xtensa_get_kio_paddr(void)
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{
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return xtensa_kio_paddr;
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}
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#endif
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/*
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* Return the virtual address for the specified bus memory.
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* Note that we currently don't support any address outside the KIO segment.
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*/
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static inline void __iomem *ioremap_nocache(unsigned long offset,
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unsigned long size)
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{
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if (offset >= XCHAL_KIO_PADDR
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&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
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return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
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else
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BUG();
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}
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static inline void __iomem *ioremap_cache(unsigned long offset,
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unsigned long size)
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{
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if (offset >= XCHAL_KIO_PADDR
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&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
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return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
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else
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BUG();
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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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static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
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{
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return ioremap_nocache(offset, size);
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}
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static inline void iounmap(volatile void __iomem *addr)
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{
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}
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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#endif /* CONFIG_MMU */
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#endif /* __KERNEL__ */
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#include <asm-generic/io.h>
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#endif /* _XTENSA_IO_H */
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