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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); | |
f021c8b3 | 27 | extern int xencomm_is_initialized(void); |
11d43778 IY |
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 */ |