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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 | 2 | /* |
3ec8dbcb | 3 | * local MTRR defines. |
1da177e4 LT |
4 | */ |
5 | ||
2d2ee8de PJ |
6 | #include <linux/types.h> |
7 | #include <linux/stddef.h> | |
1da177e4 | 8 | |
1da177e4 LT |
9 | #define MTRR_CHANGE_MASK_FIXED 0x01 |
10 | #define MTRR_CHANGE_MASK_VARIABLE 0x02 | |
11 | #define MTRR_CHANGE_MASK_DEFTYPE 0x04 | |
12 | ||
b558bc0a | 13 | extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; |
99fc8d42 | 14 | |
1da177e4 LT |
15 | struct mtrr_ops { |
16 | u32 vendor; | |
17 | u32 use_intel_if; | |
1da177e4 LT |
18 | void (*set)(unsigned int reg, unsigned long base, |
19 | unsigned long size, mtrr_type type); | |
20 | void (*set_all)(void); | |
21 | ||
22 | void (*get)(unsigned int reg, unsigned long *base, | |
3ec8dbcb | 23 | unsigned long *size, mtrr_type *type); |
365bff80 JB |
24 | int (*get_free_region)(unsigned long base, unsigned long size, |
25 | int replace_reg); | |
1da177e4 LT |
26 | int (*validate_add_page)(unsigned long base, unsigned long size, |
27 | unsigned int type); | |
28 | int (*have_wrcomb)(void); | |
29 | }; | |
30 | ||
365bff80 JB |
31 | extern int generic_get_free_region(unsigned long base, unsigned long size, |
32 | int replace_reg); | |
1da177e4 LT |
33 | extern int generic_validate_add_page(unsigned long base, unsigned long size, |
34 | unsigned int type); | |
35 | ||
3b9cfc0a | 36 | extern const struct mtrr_ops generic_mtrr_ops; |
1da177e4 LT |
37 | |
38 | extern int positive_have_wrcomb(void); | |
39 | ||
40 | /* library functions for processor-specific routines */ | |
41 | struct set_mtrr_context { | |
3ec8dbcb JSR |
42 | unsigned long flags; |
43 | unsigned long cr4val; | |
44 | u32 deftype_lo; | |
45 | u32 deftype_hi; | |
46 | u32 ccr3; | |
1da177e4 LT |
47 | }; |
48 | ||
1da177e4 LT |
49 | void set_mtrr_done(struct set_mtrr_context *ctxt); |
50 | void set_mtrr_cache_disable(struct set_mtrr_context *ctxt); | |
51 | void set_mtrr_prepare_save(struct set_mtrr_context *ctxt); | |
52 | ||
95ffa243 YL |
53 | void fill_mtrr_var_range(unsigned int index, |
54 | u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); | |
f9626104 | 55 | bool get_mtrr_state(void); |
ad025a73 | 56 | void mtrr_bp_pat_init(void); |
1da177e4 | 57 | |
404f6aac | 58 | extern void __init set_mtrr_ops(const struct mtrr_ops *ops); |
1da177e4 | 59 | |
6c5806ca | 60 | extern u64 size_or_mask, size_and_mask; |
3b9cfc0a | 61 | extern const struct mtrr_ops *mtrr_if; |
1da177e4 LT |
62 | |
63 | #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd) | |
64 | #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1) | |
65 | ||
66 | extern unsigned int num_var_ranges; | |
95ffa243 | 67 | extern u64 mtrr_tom2; |
f0348c43 | 68 | extern struct mtrr_state_type mtrr_state; |
1da177e4 | 69 | |
1da177e4 | 70 | void mtrr_state_warn(void); |
365bff80 | 71 | const char *mtrr_attrib_to_str(int x); |
1da177e4 LT |
72 | void mtrr_wrmsr(unsigned, unsigned, unsigned); |
73 | ||
16c02ed7 HH |
74 | /* CPU specific mtrr init functions */ |
75 | int amd_init_mtrr(void); | |
76 | int cyrix_init_mtrr(void); | |
77 | int centaur_init_mtrr(void); | |
0d890355 YL |
78 | |
79 | extern int changed_by_mtrr_cleanup; | |
80 | extern int mtrr_cleanup(unsigned address_bits); |