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b15993fc IY |
1 | /* |
2 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
3 | * of this software and associated documentation files (the "Software"), to | |
4 | * deal in the Software without restriction, including without limitation the | |
5 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
6 | * sell copies of the Software, and to permit persons to whom the Software is | |
7 | * furnished to do so, subject to the following conditions: | |
8 | * | |
9 | * The above copyright notice and this permission notice shall be included in | |
10 | * all copies or substantial portions of the Software. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
13 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
14 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
15 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
16 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
17 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
18 | * DEALINGS IN THE SOFTWARE. | |
19 | * | |
20 | * Copyright (C) IBM Corp. 2006 | |
21 | */ | |
22 | ||
23 | #ifndef _XEN_XENCOMM_H_ | |
24 | #define _XEN_XENCOMM_H_ | |
25 | ||
26 | /* A xencomm descriptor is a scatter/gather list containing physical | |
27 | * addresses corresponding to a virtually contiguous memory area. The | |
28 | * hypervisor translates these physical addresses to machine addresses to copy | |
29 | * to and from the virtually contiguous area. | |
30 | */ | |
31 | ||
32 | #define XENCOMM_MAGIC 0x58434F4D /* 'XCOM' */ | |
33 | #define XENCOMM_INVALID (~0UL) | |
34 | ||
35 | struct xencomm_desc { | |
36 | uint32_t magic; | |
37 | uint32_t nr_addrs; /* the number of entries in address[] */ | |
38 | uint64_t address[0]; | |
39 | }; | |
40 | ||
41 | #endif /* _XEN_XENCOMM_H_ */ |