e9b0a07121
Check the EFI memory map so we can use the correct memory attributes for ioremap(). Previously, we always used uncacheable access, which blows up on some machines for regular system memory. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Matt Domsch <Matt_Domsch@dell.com> Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com> Cc: "Brown, Len" <len.brown@intel.com> Cc: Andi Kleen <ak@muc.de> Acked-by: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/*
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* (c) Copyright 2006 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/compiler.h>
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#include <linux/module.h>
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#include <linux/efi.h>
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#include <asm/io.h>
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static inline void __iomem *
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__ioremap (unsigned long offset, unsigned long size)
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{
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return (void __iomem *) (__IA64_UNCACHED_OFFSET | offset);
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}
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void __iomem *
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ioremap (unsigned long offset, unsigned long size)
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{
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if (efi_mem_attribute_range(offset, size, EFI_MEMORY_UC))
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return __ioremap(offset, size);
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if (efi_mem_attribute_range(offset, size, EFI_MEMORY_WB))
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return phys_to_virt(offset);
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/*
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* Someday this should check ACPI resources so we
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* can do the right thing for hot-plugged regions.
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*/
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return __ioremap(offset, size);
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}
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EXPORT_SYMBOL(ioremap);
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void __iomem *
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ioremap_nocache (unsigned long offset, unsigned long size)
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{
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return __ioremap(offset, size);
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}
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EXPORT_SYMBOL(ioremap_nocache);
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