source: trunk/packages/xen-3.1/xen-3.1/linux-2.6-xen-sparse/include/asm-ia64/xen/xencomm.h @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 2.0 KB
Line 
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 _LINUX_XENCOMM_H_
20#define _LINUX_XENCOMM_H_
21
22#include <xen/interface/xencomm.h>
23
24#define XENCOMM_MINI_ADDRS 3
25struct xencomm_mini {
26        struct xencomm_desc _desc;
27        uint64_t address[XENCOMM_MINI_ADDRS];
28};
29
30/* Must be called before any hypercall.  */
31extern void xencomm_init (void);
32
33/* To avoid additionnal virt to phys conversion, an opaque structure is
34   presented.  */
35struct xencomm_handle;
36
37extern int xencomm_create(void *buffer, unsigned long bytes,
38                          struct xencomm_handle **desc, gfp_t type);
39extern void xencomm_free(struct xencomm_handle *desc);
40
41extern int xencomm_create_mini(struct xencomm_mini *area, int *nbr_area,
42                               void *buffer, unsigned long bytes,
43                               struct xencomm_handle **ret);
44
45/* Translate virtual address to physical address.  */
46extern unsigned long xencomm_vaddr_to_paddr(unsigned long vaddr);
47
48/* Inline version.  To be used only on linear space (kernel space).  */
49static inline struct xencomm_handle *
50xencomm_create_inline(void *buffer)
51{
52        unsigned long paddr;
53
54        paddr = xencomm_vaddr_to_paddr((unsigned long)buffer);
55        return (struct xencomm_handle *)(paddr | XENCOMM_INLINE_FLAG);
56}
57
58#define xen_guest_handle(hnd)  ((hnd).p)
59
60#endif /* _LINUX_XENCOMM_H_ */
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