5 #include <linux/types.h>
6 #include <linux/stddef.h>
8 #define MTRRdefType_MSR 0x2ff
10 #define MTRRfix16K_80000_MSR 0x258
11 #define MTRRfix16K_A0000_MSR 0x259
12 #define MTRRfix4K_C0000_MSR 0x268
13 #define MTRRfix4K_C8000_MSR 0x269
14 #define MTRRfix4K_D0000_MSR 0x26a
15 #define MTRRfix4K_D8000_MSR 0x26b
16 #define MTRRfix4K_E0000_MSR 0x26c
17 #define MTRRfix4K_E8000_MSR 0x26d
18 #define MTRRfix4K_F0000_MSR 0x26e
19 #define MTRRfix4K_F8000_MSR 0x26f
21 #define MTRR_CHANGE_MASK_FIXED 0x01
22 #define MTRR_CHANGE_MASK_VARIABLE 0x02
23 #define MTRR_CHANGE_MASK_DEFTYPE 0x04
25 extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
30 // void (*init)(void);
31 void (*set)(unsigned int reg, unsigned long base,
32 unsigned long size, mtrr_type type);
33 void (*set_all)(void);
35 void (*get)(unsigned int reg, unsigned long *base,
36 unsigned long *size, mtrr_type * type);
37 int (*get_free_region)(unsigned long base, unsigned long size,
39 int (*validate_add_page)(unsigned long base, unsigned long size,
41 int (*have_wrcomb)(void);
44 extern int generic_get_free_region(unsigned long base, unsigned long size,
46 extern int generic_validate_add_page(unsigned long base, unsigned long size,
49 extern struct mtrr_ops generic_mtrr_ops;
51 extern int positive_have_wrcomb(void);
53 /* library functions for processor-specific routines */
54 struct set_mtrr_context {
62 void set_mtrr_done(struct set_mtrr_context *ctxt);
63 void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
64 void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
66 void fill_mtrr_var_range(unsigned int index,
67 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
68 void get_mtrr_state(void);
70 extern void set_mtrr_ops(struct mtrr_ops * ops);
72 extern u64 size_or_mask, size_and_mask;
73 extern struct mtrr_ops * mtrr_if;
75 #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
76 #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1)
78 extern unsigned int num_var_ranges;
80 extern struct mtrr_state_type mtrr_state;
82 void mtrr_state_warn(void);
83 const char *mtrr_attrib_to_str(int x);
84 void mtrr_wrmsr(unsigned, unsigned, unsigned);
86 /* CPU specific mtrr init functions */
87 int amd_init_mtrr(void);
88 int cyrix_init_mtrr(void);
89 int centaur_init_mtrr(void);
91 extern int changed_by_mtrr_cleanup;
92 extern int mtrr_cleanup(unsigned address_bits);