67fe8d27a8
Xen needs some address conversions between pseudo physical address (guest phsyical address), guest machine address (real machine address) and dma address. Define helper functions for those address conversion. Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/******************************************************************************
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* arch/ia64/include/asm/xen/page.h
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*
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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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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*/
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#ifndef _ASM_IA64_XEN_PAGE_H
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#define _ASM_IA64_XEN_PAGE_H
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#define INVALID_P2M_ENTRY (~0UL)
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static inline unsigned long mfn_to_pfn(unsigned long mfn)
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{
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return mfn;
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}
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static inline unsigned long pfn_to_mfn(unsigned long pfn)
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{
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return pfn;
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}
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#define phys_to_machine_mapping_valid(_x) (1)
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static inline void *mfn_to_virt(unsigned long mfn)
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{
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return __va(mfn << PAGE_SHIFT);
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}
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static inline unsigned long virt_to_mfn(void *virt)
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{
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return __pa(virt) >> PAGE_SHIFT;
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}
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/* for tpmfront.c */
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static inline unsigned long virt_to_machine(void *virt)
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{
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return __pa(virt);
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}
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static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
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{
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/* nothing */
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}
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#define pte_mfn(_x) pte_pfn(_x)
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#define mfn_pte(_x, _y) __pte_ma(0) /* unmodified use */
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#define __pte_ma(_x) ((pte_t) {(_x)}) /* unmodified use */
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#endif /* _ASM_IA64_XEN_PAGE_H */
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