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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License, or |
5 | * (at your option) any later version. |
6 | * |
7 | * This program is distributed in the hope that it will be useful, |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
10 | * GNU General Public License for more details. |
11 | * |
12 | * You should have received a copy of the GNU General Public License |
13 | * along with this program; if not, write to the Free Software |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
15 | * |
16 | * Copyright (C) IBM Corp. 2006 |
17 | * |
18 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> |
19 | * Jerone Young <jyoung5@us.ibm.com> |
20 | */ |
21 | |
22 | #ifndef _LINUX_XENCOMM_H_ |
23 | #define _LINUX_XENCOMM_H_ |
24 | |
25 | #include <xen/interface/xencomm.h> |
26 | |
27 | #define XENCOMM_MINI_ADDRS 3 |
28 | struct xencomm_mini { |
29 | struct xencomm_desc _desc; |
30 | uint64_t address[XENCOMM_MINI_ADDRS]; |
31 | }; |
32 | |
33 | /* To avoid additionnal virt to phys conversion, an opaque structure is |
34 | presented. */ |
35 | struct xencomm_handle; |
36 | |
37 | extern void xencomm_free(struct xencomm_handle *desc); |
38 | extern struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes); |
39 | extern struct xencomm_handle *__xencomm_map_no_alloc(void *ptr, |
40 | unsigned long bytes, struct xencomm_mini *xc_area); |
41 | |
42 | #if 0 |
43 | #define XENCOMM_MINI_ALIGNED(xc_desc, n) \ |
44 | struct xencomm_mini xc_desc ## _base[(n)] \ |
45 | __attribute__((__aligned__(sizeof(struct xencomm_mini)))); \ |
46 | struct xencomm_mini *xc_desc = &xc_desc ## _base[0]; |
47 | #else |
48 | /* |
49 | * gcc bug workaround: |
50 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660 |
51 | * gcc doesn't handle properly stack variable with |
52 | * __attribute__((__align__(sizeof(struct xencomm_mini)))) |
53 | */ |
54 | #define XENCOMM_MINI_ALIGNED(xc_desc, n) \ |
55 | unsigned char xc_desc ## _base[((n) + 1 ) * \ |
56 | sizeof(struct xencomm_mini)]; \ |
57 | struct xencomm_mini *xc_desc = (struct xencomm_mini *) \ |
58 | ((unsigned long)xc_desc ## _base + \ |
59 | (sizeof(struct xencomm_mini) - \ |
60 | ((unsigned long)xc_desc ## _base) % \ |
61 | sizeof(struct xencomm_mini))); |
62 | #endif |
63 | #define xencomm_map_no_alloc(ptr, bytes) \ |
64 | ({ XENCOMM_MINI_ALIGNED(xc_desc, 1); \ |
65 | __xencomm_map_no_alloc(ptr, bytes, xc_desc); }) |
66 | |
67 | /* provided by architecture code: */ |
68 | extern unsigned long xencomm_vtop(unsigned long vaddr); |
69 | |
70 | static inline void *xencomm_pa(void *ptr) |
71 | { |
72 | return (void *)xencomm_vtop((unsigned long)ptr); |
73 | } |
74 | |
75 | #define xen_guest_handle(hnd) ((hnd).p) |
76 | |
77 | #endif /* _LINUX_XENCOMM_H_ */ |
78 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9