5 #include <linux/types.h>
6 #include <linux/stddef.h>
8 #define MTRRdefType_MSR 0x2ff
10 #define MTRRfix4K_C0000_MSR 0x268
12 #define MTRR_CHANGE_MASK_FIXED 0x01
13 #define MTRR_CHANGE_MASK_VARIABLE 0x02
14 #define MTRR_CHANGE_MASK_DEFTYPE 0x04
16 extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
21 // void (*init)(void);
22 void (*set)(unsigned int reg, unsigned long base,
23 unsigned long size, mtrr_type type);
24 void (*set_all)(void);
26 void (*get)(unsigned int reg, unsigned long *base,
27 unsigned long *size, mtrr_type * type);
28 int (*get_free_region)(unsigned long base, unsigned long size,
30 int (*validate_add_page)(unsigned long base, unsigned long size,
32 int (*have_wrcomb)(void);
35 extern int generic_get_free_region(unsigned long base, unsigned long size,
37 extern int generic_validate_add_page(unsigned long base, unsigned long size,
40 extern struct mtrr_ops generic_mtrr_ops;
42 extern int positive_have_wrcomb(void);
44 /* library functions for processor-specific routines */
45 struct set_mtrr_context {
53 void set_mtrr_done(struct set_mtrr_context *ctxt);
54 void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
55 void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
57 void fill_mtrr_var_range(unsigned int index,
58 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
59 void get_mtrr_state(void);
61 extern void set_mtrr_ops(struct mtrr_ops * ops);
63 extern u64 size_or_mask, size_and_mask;
64 extern struct mtrr_ops * mtrr_if;
66 #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
67 #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1)
69 extern unsigned int num_var_ranges;
71 extern struct mtrr_state_type mtrr_state;
73 void mtrr_state_warn(void);
74 const char *mtrr_attrib_to_str(int x);
75 void mtrr_wrmsr(unsigned, unsigned, unsigned);
77 /* CPU specific mtrr init functions */
78 int amd_init_mtrr(void);
79 int cyrix_init_mtrr(void);
80 int centaur_init_mtrr(void);
82 extern int changed_by_mtrr_cleanup;
83 extern int mtrr_cleanup(unsigned address_bits);