5 #include <linux/types.h>
6 #include <linux/stddef.h>
8 #define MTRRcap_MSR 0x0fe
9 #define MTRRdefType_MSR 0x2ff
11 #define MTRRfix64K_00000_MSR 0x250
12 #define MTRRfix16K_80000_MSR 0x258
13 #define MTRRfix16K_A0000_MSR 0x259
14 #define MTRRfix4K_C0000_MSR 0x268
15 #define MTRRfix4K_C8000_MSR 0x269
16 #define MTRRfix4K_D0000_MSR 0x26a
17 #define MTRRfix4K_D8000_MSR 0x26b
18 #define MTRRfix4K_E0000_MSR 0x26c
19 #define MTRRfix4K_E8000_MSR 0x26d
20 #define MTRRfix4K_F0000_MSR 0x26e
21 #define MTRRfix4K_F8000_MSR 0x26f
23 #define MTRR_CHANGE_MASK_FIXED 0x01
24 #define MTRR_CHANGE_MASK_VARIABLE 0x02
25 #define MTRR_CHANGE_MASK_DEFTYPE 0x04
27 extern unsigned int mtrr_usage_table
[MTRR_MAX_VAR_RANGES
];
32 // void (*init)(void);
33 void (*set
)(unsigned int reg
, unsigned long base
,
34 unsigned long size
, mtrr_type type
);
35 void (*set_all
)(void);
37 void (*get
)(unsigned int reg
, unsigned long *base
,
38 unsigned long *size
, mtrr_type
* type
);
39 int (*get_free_region
)(unsigned long base
, unsigned long size
,
41 int (*validate_add_page
)(unsigned long base
, unsigned long size
,
43 int (*have_wrcomb
)(void);
46 extern int generic_get_free_region(unsigned long base
, unsigned long size
,
48 extern int generic_validate_add_page(unsigned long base
, unsigned long size
,
51 extern struct mtrr_ops generic_mtrr_ops
;
53 extern int positive_have_wrcomb(void);
55 /* library functions for processor-specific routines */
56 struct set_mtrr_context
{
64 void set_mtrr_done(struct set_mtrr_context
*ctxt
);
65 void set_mtrr_cache_disable(struct set_mtrr_context
*ctxt
);
66 void set_mtrr_prepare_save(struct set_mtrr_context
*ctxt
);
68 void fill_mtrr_var_range(unsigned int index
,
69 u32 base_lo
, u32 base_hi
, u32 mask_lo
, u32 mask_hi
);
70 void get_mtrr_state(void);
72 extern void set_mtrr_ops(struct mtrr_ops
* ops
);
74 extern u64 size_or_mask
, size_and_mask
;
75 extern struct mtrr_ops
* mtrr_if
;
77 #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
78 #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1)
80 extern unsigned int num_var_ranges
;
83 void mtrr_state_warn(void);
84 const char *mtrr_attrib_to_str(int x
);
85 void mtrr_wrmsr(unsigned, unsigned, unsigned);
87 /* CPU specific mtrr init functions */
88 int amd_init_mtrr(void);
89 int cyrix_init_mtrr(void);
90 int centaur_init_mtrr(void);