xen: use generic functions instead of xen_{alloc, free}_vm_area()
[pandora-kernel.git] / arch / ia64 / xen / grant-table.c
1 /******************************************************************************
2  * arch/ia64/xen/grant-table.c
3  *
4  * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
5  *                    VA Linux Systems Japan K.K.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  *
21  */
22
23 #include <linux/module.h>
24 #include <linux/vmalloc.h>
25 #include <linux/slab.h>
26 #include <linux/mm.h>
27
28 #include <xen/interface/xen.h>
29 #include <xen/interface/memory.h>
30 #include <xen/grant_table.h>
31
32 #include <asm/xen/hypervisor.h>
33
34 /****************************************************************************
35  * grant table hack
36  * cmd: GNTTABOP_xxx
37  */
38
39 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
40                            unsigned long max_nr_gframes,
41                            struct grant_entry **__shared)
42 {
43         *__shared = __va(frames[0] << PAGE_SHIFT);
44         return 0;
45 }
46
47 void arch_gnttab_unmap_shared(struct grant_entry *shared,
48                               unsigned long nr_gframes)
49 {
50         /* nothing */
51 }
52
53 static void
54 gnttab_map_grant_ref_pre(struct gnttab_map_grant_ref *uop)
55 {
56         uint32_t flags;
57
58         flags = uop->flags;
59
60         if (flags & GNTMAP_host_map) {
61                 if (flags & GNTMAP_application_map) {
62                         printk(KERN_DEBUG
63                                "GNTMAP_application_map is not supported yet: "
64                                "flags 0x%x\n", flags);
65                         BUG();
66                 }
67                 if (flags & GNTMAP_contains_pte) {
68                         printk(KERN_DEBUG
69                                "GNTMAP_contains_pte is not supported yet: "
70                                "flags 0x%x\n", flags);
71                         BUG();
72                 }
73         } else if (flags & GNTMAP_device_map) {
74                 printk("GNTMAP_device_map is not supported yet 0x%x\n", flags);
75                 BUG();  /* not yet. actually this flag is not used. */
76         } else {
77                 BUG();
78         }
79 }
80
81 int
82 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
83 {
84         if (cmd == GNTTABOP_map_grant_ref) {
85                 unsigned int i;
86                 for (i = 0; i < count; i++) {
87                         gnttab_map_grant_ref_pre(
88                                 (struct gnttab_map_grant_ref *)uop + i);
89                 }
90         }
91         return xencomm_hypercall_grant_table_op(cmd, uop, count);
92 }
93
94 EXPORT_SYMBOL(HYPERVISOR_grant_table_op);