1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * local MTRR defines. 4 */ 5 6 #include <linux/types.h> 7 #include <linux/stddef.h> 8 9 #define MTRR_CHANGE_MASK_FIXED 0x01 10 #define MTRR_CHANGE_MASK_VARIABLE 0x02 11 #define MTRR_CHANGE_MASK_DEFTYPE 0x04 12 13 extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; 14 15 struct mtrr_ops { 16 u32 vendor; 17 u32 use_intel_if; 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 const 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 bool get_mtrr_state(void); 56 void mtrr_bp_pat_init(void); 57 58 extern void __init set_mtrr_ops(const struct mtrr_ops *ops); 59 60 extern u64 size_or_mask, size_and_mask; 61 extern const struct mtrr_ops *mtrr_if; 62 63 #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd) 64 #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1) 65 66 extern unsigned int num_var_ranges; 67 extern u64 mtrr_tom2; 68 extern struct mtrr_state_type mtrr_state; 69 70 void mtrr_state_warn(void); 71 const char *mtrr_attrib_to_str(int x); 72 void mtrr_wrmsr(unsigned, unsigned, unsigned); 73 74 /* CPU specific mtrr init functions */ 75 int amd_init_mtrr(void); 76 int cyrix_init_mtrr(void); 77 int centaur_init_mtrr(void); 78 79 extern int changed_by_mtrr_cleanup; 80 extern int mtrr_cleanup(unsigned address_bits); 81