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 12extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; 13 14struct 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 30extern int generic_get_free_region(unsigned long base, unsigned long size, 31 int replace_reg); 32extern int generic_validate_add_page(unsigned long base, unsigned long size, 33 unsigned int type); 34 35extern const struct mtrr_ops generic_mtrr_ops; 36 37extern int positive_have_wrcomb(void); 38 39/* library functions for processor-specific routines */ 40struct set_mtrr_context { 41 unsigned long flags; 42 unsigned long cr4val; 43 u32 deftype_lo; 44 u32 deftype_hi; 45 u32 ccr3; 46}; 47 48void set_mtrr_done(struct set_mtrr_context *ctxt); 49void set_mtrr_cache_disable(struct set_mtrr_context *ctxt); 50void set_mtrr_prepare_save(struct set_mtrr_context *ctxt); 51 52void fill_mtrr_var_range(unsigned int index, 53 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); 54void get_mtrr_state(void); 55 56extern void set_mtrr_ops(const struct mtrr_ops *ops); 57 58extern u64 size_or_mask, size_and_mask; 59extern 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 64extern unsigned int num_var_ranges; 65extern u64 mtrr_tom2; 66extern struct mtrr_state_type mtrr_state; 67 68void mtrr_state_warn(void); 69const char *mtrr_attrib_to_str(int x); 70void mtrr_wrmsr(unsigned, unsigned, unsigned); 71 72/* CPU specific mtrr init functions */ 73int amd_init_mtrr(void); 74int cyrix_init_mtrr(void); 75int centaur_init_mtrr(void); 76 77extern int changed_by_mtrr_cleanup; 78extern int mtrr_cleanup(unsigned address_bits); 79