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 (*init)(void); 18 void (*set)(unsigned int reg, unsigned long base, 19 unsigned long size, mtrr_type type); 20 void (*set_all)(void); 21 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 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 void get_mtrr_state(void); 56 57 extern void set_mtrr_ops(struct mtrr_ops * ops); 58 59 extern u64 size_or_mask, size_and_mask; 60 extern struct mtrr_ops * mtrr_if; 61 62 #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd) 63 #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1) 64 65 extern unsigned int num_var_ranges; 66 extern u64 mtrr_tom2; 67 extern struct mtrr_state_type mtrr_state; 68 69 void mtrr_state_warn(void); 70 const char *mtrr_attrib_to_str(int x); 71 void mtrr_wrmsr(unsigned, unsigned, unsigned); 72 73 /* CPU specific mtrr init functions */ 74 int amd_init_mtrr(void); 75 int cyrix_init_mtrr(void); 76 int centaur_init_mtrr(void); 77 78 extern int changed_by_mtrr_cleanup; 79 extern int mtrr_cleanup(unsigned address_bits); 80