diff options
Diffstat (limited to 'arch/ia64/include/asm/xen/xencomm.h')
| -rw-r--r-- | arch/ia64/include/asm/xen/xencomm.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/xen/xencomm.h b/arch/ia64/include/asm/xen/xencomm.h new file mode 100644 index 000000000000..cded677bebf2 --- /dev/null +++ b/arch/ia64/include/asm/xen/xencomm.h @@ -0,0 +1,42 @@ +/* + * 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 */ |