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402d3265 DH |
1 | /* MTD backing device capabilities |
2 | * | |
3 | * Copyright © 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/backing-dev.h> | |
13 | #include <linux/mtd/mtd.h> | |
14 | #include "internal.h" | |
15 | ||
16 | /* | |
17 | * backing device capabilities for non-mappable devices (such as NAND flash) | |
18 | * - permits private mappings, copies are taken of the data | |
19 | */ | |
20 | struct backing_dev_info mtd_bdi_unmappable = { | |
21 | .capabilities = BDI_CAP_MAP_COPY, | |
22 | }; | |
23 | ||
24 | /* | |
25 | * backing device capabilities for R/O mappable devices (such as ROM) | |
26 | * - permits private mappings, copies are taken of the data | |
27 | * - permits non-writable shared mappings | |
28 | */ | |
29 | struct backing_dev_info mtd_bdi_ro_mappable = { | |
30 | .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT | | |
31 | BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP), | |
32 | }; | |
33 | ||
34 | /* | |
35 | * backing device capabilities for writable mappable devices (such as RAM) | |
36 | * - permits private mappings, copies are taken of the data | |
37 | * - permits non-writable shared mappings | |
38 | */ | |
39 | struct backing_dev_info mtd_bdi_rw_mappable = { | |
40 | .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT | | |
41 | BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP | | |
42 | BDI_CAP_WRITE_MAP), | |
43 | }; |