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 bool mtrr_debug; 14 #define Dprintk(x...) do { if (mtrr_debug) pr_info(x); } while (0) 15 16 extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; 17 18 struct mtrr_ops { 19 u32 var_regs; 20 void (*set)(unsigned int reg, unsigned long base, 21 unsigned long size, mtrr_type type); 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 fill_mtrr_var_range(unsigned int index, 50 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); 51 bool get_mtrr_state(void); 52 53 extern const struct mtrr_ops *mtrr_if; 54 extern struct mutex mtrr_mutex; 55 56 extern unsigned int num_var_ranges; 57 extern u64 mtrr_tom2; 58 extern struct mtrr_state_type mtrr_state; 59 extern u32 phys_hi_rsvd; 60 61 void mtrr_state_warn(void); 62 const char *mtrr_attrib_to_str(int x); 63 void mtrr_wrmsr(unsigned, unsigned, unsigned); 64 #ifdef CONFIG_X86_32 65 void mtrr_set_if(void); 66 void mtrr_register_syscore(void); 67 #else 68 static inline void mtrr_set_if(void) { } 69 static inline void mtrr_register_syscore(void) { } 70 #endif 71 void mtrr_build_map(void); 72 void mtrr_copy_map(void); 73 74 /* CPU specific mtrr_ops vectors. */ 75 extern const struct mtrr_ops amd_mtrr_ops; 76 extern const struct mtrr_ops cyrix_mtrr_ops; 77 extern const struct mtrr_ops centaur_mtrr_ops; 78 79 extern int changed_by_mtrr_cleanup; 80 extern int mtrr_cleanup(void); 81 82 /* 83 * Must be used by code which uses mtrr_if to call platform-specific 84 * MTRR manipulation functions. 85 */ 86 static inline bool mtrr_enabled(void) 87 { 88 return !!mtrr_if; 89 } 90 void generic_rebuild_map(void); 91