Isaku Yamahata | 11d4377 | 2008-10-17 11:17:53 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 Hollis Blanchard <hollisb@us.ibm.com>, IBM Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | #ifndef _ASM_IA64_XEN_XENCOMM_H |
| 20 | #define _ASM_IA64_XEN_XENCOMM_H |
| 21 | |
| 22 | #include <xen/xencomm.h> |
| 23 | #include <asm/pgtable.h> |
| 24 | |
| 25 | /* Must be called before any hypercall. */ |
| 26 | extern void xencomm_initialize(void); |
Isaku Yamahata | f021c8b | 2008-10-17 11:17:54 +0900 | [diff] [blame] | 27 | extern int xencomm_is_initialized(void); |
Isaku Yamahata | 11d4377 | 2008-10-17 11:17:53 +0900 | [diff] [blame] | 28 | |
| 29 | /* Check if virtual contiguity means physical contiguity |
| 30 | * where the passed address is a pointer value in virtual address. |
| 31 | * On ia64, identity mapping area in region 7 or the piece of region 5 |
| 32 | * that is mapped by itr[IA64_TR_KERNEL]/dtr[IA64_TR_KERNEL] |
| 33 | */ |
| 34 | static inline int xencomm_is_phys_contiguous(unsigned long addr) |
| 35 | { |
| 36 | return (PAGE_OFFSET <= addr && |
| 37 | addr < (PAGE_OFFSET + (1UL << IA64_MAX_PHYS_BITS))) || |
| 38 | (KERNEL_START <= addr && |
| 39 | addr < KERNEL_START + KERNEL_TR_PAGE_SIZE); |
| 40 | } |
| 41 | |
| 42 | #endif /* _ASM_IA64_XEN_XENCOMM_H */ |