1 | /* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */ |
2 | /* Generic MTRR (Memory Type Range Register) ioctls. |
3 | |
4 | Copyright (C) 1997-1999 Richard Gooch |
5 | |
6 | This library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Library General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2 of the License, or (at your option) any later version. |
10 | |
11 | This library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Library General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Library General Public |
17 | License along with this library; if not, write to the Free |
18 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | |
20 | Richard Gooch may be reached by email at rgooch@atnf.csiro.au |
21 | The postal address is: |
22 | Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia. |
23 | */ |
24 | #ifndef _UAPI_ASM_X86_MTRR_H |
25 | #define _UAPI_ASM_X86_MTRR_H |
26 | |
27 | #include <linux/types.h> |
28 | #include <linux/ioctl.h> |
29 | #include <linux/errno.h> |
30 | |
31 | #define MTRR_IOCTL_BASE 'M' |
32 | |
33 | /* Warning: this structure has a different order from i386 |
34 | on x86-64. The 32bit emulation code takes care of that. |
35 | But you need to use this for 64bit, otherwise your X server |
36 | will break. */ |
37 | |
38 | #ifdef __i386__ |
39 | struct mtrr_sentry { |
40 | unsigned long base; /* Base address */ |
41 | unsigned int size; /* Size of region */ |
42 | unsigned int type; /* Type of region */ |
43 | }; |
44 | |
45 | struct mtrr_gentry { |
46 | unsigned int regnum; /* Register number */ |
47 | unsigned long base; /* Base address */ |
48 | unsigned int size; /* Size of region */ |
49 | unsigned int type; /* Type of region */ |
50 | }; |
51 | |
52 | #else /* __i386__ */ |
53 | |
54 | struct mtrr_sentry { |
55 | __u64 base; /* Base address */ |
56 | __u32 size; /* Size of region */ |
57 | __u32 type; /* Type of region */ |
58 | }; |
59 | |
60 | struct mtrr_gentry { |
61 | __u64 base; /* Base address */ |
62 | __u32 size; /* Size of region */ |
63 | __u32 regnum; /* Register number */ |
64 | __u32 type; /* Type of region */ |
65 | __u32 _pad; /* Unused */ |
66 | }; |
67 | |
68 | #endif /* !__i386__ */ |
69 | |
70 | struct mtrr_var_range { |
71 | __u32 base_lo; |
72 | __u32 base_hi; |
73 | __u32 mask_lo; |
74 | __u32 mask_hi; |
75 | }; |
76 | |
77 | /* In the Intel processor's MTRR interface, the MTRR type is always held in |
78 | an 8 bit field: */ |
79 | typedef __u8 mtrr_type; |
80 | |
81 | #define MTRR_NUM_FIXED_RANGES 88 |
82 | #define MTRR_MAX_VAR_RANGES 256 |
83 | |
84 | #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) |
85 | #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) |
86 | |
87 | /* These are the various ioctls */ |
88 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) |
89 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) |
90 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) |
91 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) |
92 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) |
93 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) |
94 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) |
95 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) |
96 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) |
97 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) |
98 | |
99 | /* MTRR memory types, which are defined in SDM */ |
100 | #define MTRR_TYPE_UNCACHABLE 0 |
101 | #define MTRR_TYPE_WRCOMB 1 |
102 | /*#define MTRR_TYPE_ 2*/ |
103 | /*#define MTRR_TYPE_ 3*/ |
104 | #define MTRR_TYPE_WRTHROUGH 4 |
105 | #define MTRR_TYPE_WRPROT 5 |
106 | #define MTRR_TYPE_WRBACK 6 |
107 | #define MTRR_NUM_TYPES 7 |
108 | |
109 | /* |
110 | * Invalid MTRR memory type. No longer used outside of MTRR code. |
111 | * Note, this value is allocated from the reserved values (0x7-0xff) of |
112 | * the MTRR memory types. |
113 | */ |
114 | #define MTRR_TYPE_INVALID 0xff |
115 | |
116 | #endif /* _UAPI_ASM_X86_MTRR_H */ |
117 | |