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