1 | /* $NetBSD: mm.h,v 1.3 2016/07/11 16:13:28 matt Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2008 Joerg Sonnenberger <joerg@NetBSD.org>. |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in |
15 | * the documentation and/or other materials provided with the |
16 | * distribution. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
22 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
25 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
26 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
27 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
28 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _SYS_DEV_MM_H_ |
33 | #define _SYS_DEV_MM_H_ |
34 | |
35 | #include <sys/uio.h> |
36 | #include <uvm/uvm_prot.h> |
37 | |
38 | /* |
39 | * Required access check for the physical address. |
40 | */ |
41 | int mm_md_physacc(paddr_t, vm_prot_t); |
42 | |
43 | /* |
44 | * Optional open() hook for MD. Used by i386 for /dev/io emulation. |
45 | * |
46 | * machine/types.h must define __HAVE_MM_MD_OPEN to use this. |
47 | */ |
48 | int mm_md_open(dev_t, int, int, struct lwp *); |
49 | |
50 | /* |
51 | * Optional read/write hook for additional minor devices. |
52 | * Must handle the complete uio, not execute in a loop. |
53 | * |
54 | * machine/types.h must define __HAVE_MM_MD_READWRITE to use this. |
55 | */ |
56 | int mm_md_readwrite(dev_t, struct uio *); |
57 | |
58 | /* |
59 | * Optional mmap hook for additional MD minor devices. |
60 | * |
61 | * machine/types.h must define __HAVE_MM_MD_READWRITE to use this. |
62 | */ |
63 | paddr_t mm_md_mmap(dev_t, off_t, int); |
64 | |
65 | /* |
66 | * Optional access check for the virtual address. The third argument tells |
67 | * mm that the check was done and uvm_kernacc is overriden. |
68 | * |
69 | * machine/types.h must define __HAVE_MM_MD_KERNACC to use this. |
70 | */ |
71 | int mm_md_kernacc(void *, vm_prot_t, bool *); |
72 | |
73 | /* |
74 | * Optional hook to map physical address back to pre-mapped virtual space. |
75 | * This is used e.g. when physical memory is lineary mapped. |
76 | * |
77 | * machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_PHYS to use this. |
78 | */ |
79 | bool mm_md_direct_mapped_phys(paddr_t, vaddr_t *); |
80 | |
81 | /* |
82 | * Optional hook to map virtual address back to physical address for explicit |
83 | * access check. This is used e.g. when physical memory is lineary mapped. |
84 | * |
85 | * machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_IO to use this. |
86 | */ |
87 | bool mm_md_direct_mapped_io(void *, paddr_t *); |
88 | |
89 | /* |
90 | * Some architectures may need to deal with cache aliasing issues. |
91 | * Optional hook to fetch a page's current color and returns whether |
92 | * that page can be direct mapped. |
93 | * machine/types.h must define __HAVE_MM_MD_CACHE_ALIASING to use this. |
94 | */ |
95 | bool mm_md_page_color(paddr_t, int *); |
96 | |
97 | #endif /* _SYS_DEV_MM_H_ */ |
98 | |