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