2008-10-17 10:17:53 +08:00
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/*
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* Copyright (C) 2006 Hollis Blanchard <hollisb@us.ibm.com>, IBM Corporation
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ASM_IA64_XEN_XENCOMM_H
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#define _ASM_IA64_XEN_XENCOMM_H
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#include <xen/xencomm.h>
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#include <asm/pgtable.h>
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/* Must be called before any hypercall. */
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extern void xencomm_initialize(void);
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2008-10-17 10:17:54 +08:00
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extern int xencomm_is_initialized(void);
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2008-10-17 10:17:53 +08:00
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/* Check if virtual contiguity means physical contiguity
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* where the passed address is a pointer value in virtual address.
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* On ia64, identity mapping area in region 7 or the piece of region 5
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* that is mapped by itr[IA64_TR_KERNEL]/dtr[IA64_TR_KERNEL]
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*/
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static inline int xencomm_is_phys_contiguous(unsigned long addr)
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{
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return (PAGE_OFFSET <= addr &&
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addr < (PAGE_OFFSET + (1UL << IA64_MAX_PHYS_BITS))) ||
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(KERNEL_START <= addr &&
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addr < KERNEL_START + KERNEL_TR_PAGE_SIZE);
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}
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#endif /* _ASM_IA64_XEN_XENCOMM_H */
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