1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * local MTRR defines. |
4 | */ |
5 | |
6 | #include <linux/types.h> |
7 | #include <linux/stddef.h> |
8 | |
9 | #define MTRR_CHANGE_MASK_FIXED 0x01 |
10 | #define MTRR_CHANGE_MASK_VARIABLE 0x02 |
11 | #define MTRR_CHANGE_MASK_DEFTYPE 0x04 |
12 | |
13 | extern bool mtrr_debug; |
14 | #define Dprintk(x...) do { if (mtrr_debug) pr_info(x); } while (0) |
15 | |
16 | extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; |
17 | |
18 | struct mtrr_ops { |
19 | u32 var_regs; |
20 | void (*set)(unsigned int reg, unsigned long base, |
21 | unsigned long size, mtrr_type type); |
22 | void (*get)(unsigned int reg, unsigned long *base, |
23 | unsigned long *size, mtrr_type *type); |
24 | int (*get_free_region)(unsigned long base, unsigned long size, |
25 | int replace_reg); |
26 | int (*validate_add_page)(unsigned long base, unsigned long size, |
27 | unsigned int type); |
28 | int (*have_wrcomb)(void); |
29 | }; |
30 | |
31 | extern int generic_get_free_region(unsigned long base, unsigned long size, |
32 | int replace_reg); |
33 | extern int generic_validate_add_page(unsigned long base, unsigned long size, |
34 | unsigned int type); |
35 | |
36 | extern const struct mtrr_ops generic_mtrr_ops; |
37 | |
38 | extern int positive_have_wrcomb(void); |
39 | |
40 | /* library functions for processor-specific routines */ |
41 | struct set_mtrr_context { |
42 | unsigned long flags; |
43 | unsigned long cr4val; |
44 | u32 deftype_lo; |
45 | u32 deftype_hi; |
46 | u32 ccr3; |
47 | }; |
48 | |
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 | |
53 | void fill_mtrr_var_range(unsigned int index, |
54 | u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); |
55 | bool get_mtrr_state(void); |
56 | |
57 | extern const struct mtrr_ops *mtrr_if; |
58 | extern struct mutex mtrr_mutex; |
59 | |
60 | extern unsigned int num_var_ranges; |
61 | extern u64 mtrr_tom2; |
62 | extern struct mtrr_state_type mtrr_state; |
63 | extern u32 phys_hi_rsvd; |
64 | |
65 | void mtrr_state_warn(void); |
66 | const char *mtrr_attrib_to_str(int x); |
67 | void mtrr_wrmsr(unsigned, unsigned, unsigned); |
68 | #ifdef CONFIG_X86_32 |
69 | void mtrr_set_if(void); |
70 | void mtrr_register_syscore(void); |
71 | #else |
72 | static inline void mtrr_set_if(void) { } |
73 | static inline void mtrr_register_syscore(void) { } |
74 | #endif |
75 | void mtrr_build_map(void); |
76 | void mtrr_copy_map(void); |
77 | |
78 | /* CPU specific mtrr_ops vectors. */ |
79 | extern const struct mtrr_ops amd_mtrr_ops; |
80 | extern const struct mtrr_ops cyrix_mtrr_ops; |
81 | extern const struct mtrr_ops centaur_mtrr_ops; |
82 | |
83 | extern int changed_by_mtrr_cleanup; |
84 | extern int mtrr_cleanup(void); |
85 | |
86 | /* |
87 | * Must be used by code which uses mtrr_if to call platform-specific |
88 | * MTRR manipulation functions. |
89 | */ |
90 | static inline bool mtrr_enabled(void) |
91 | { |
92 | return !!mtrr_if; |
93 | } |
94 | void generic_rebuild_map(void); |
95 | |