| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * local MTRR defines. |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/stddef.h> |
| |
| #define MTRR_CHANGE_MASK_FIXED 0x01 |
| #define MTRR_CHANGE_MASK_VARIABLE 0x02 |
| #define MTRR_CHANGE_MASK_DEFTYPE 0x04 |
| |
| extern bool mtrr_debug; |
| #define Dprintk(x...) do { if (mtrr_debug) pr_info(x); } while (0) |
| |
| extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; |
| |
| struct mtrr_ops { |
| u32 var_regs; |
| void (*set)(unsigned int reg, unsigned long base, |
| unsigned long size, mtrr_type type); |
| void (*get)(unsigned int reg, unsigned long *base, |
| unsigned long *size, mtrr_type *type); |
| int (*get_free_region)(unsigned long base, unsigned long size, |
| int replace_reg); |
| int (*validate_add_page)(unsigned long base, unsigned long size, |
| unsigned int type); |
| int (*have_wrcomb)(void); |
| }; |
| |
| extern int generic_get_free_region(unsigned long base, unsigned long size, |
| int replace_reg); |
| extern int generic_validate_add_page(unsigned long base, unsigned long size, |
| unsigned int type); |
| |
| extern const struct mtrr_ops generic_mtrr_ops; |
| |
| extern int positive_have_wrcomb(void); |
| |
| /* library functions for processor-specific routines */ |
| struct set_mtrr_context { |
| unsigned long flags; |
| unsigned long cr4val; |
| u32 deftype_lo; |
| u32 deftype_hi; |
| u32 ccr3; |
| }; |
| |
| void set_mtrr_done(struct set_mtrr_context *ctxt); |
| void set_mtrr_cache_disable(struct set_mtrr_context *ctxt); |
| void set_mtrr_prepare_save(struct set_mtrr_context *ctxt); |
| |
| void fill_mtrr_var_range(unsigned int index, |
| u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); |
| bool get_mtrr_state(void); |
| |
| extern const struct mtrr_ops *mtrr_if; |
| extern struct mutex mtrr_mutex; |
| |
| extern unsigned int num_var_ranges; |
| extern u64 mtrr_tom2; |
| extern struct mtrr_state_type mtrr_state; |
| extern u32 phys_hi_rsvd; |
| |
| void mtrr_state_warn(void); |
| const char *mtrr_attrib_to_str(int x); |
| void mtrr_wrmsr(unsigned, unsigned, unsigned); |
| #ifdef CONFIG_X86_32 |
| void mtrr_set_if(void); |
| void mtrr_register_syscore(void); |
| #else |
| static inline void mtrr_set_if(void) { } |
| static inline void mtrr_register_syscore(void) { } |
| #endif |
| void mtrr_build_map(void); |
| void mtrr_copy_map(void); |
| |
| /* CPU specific mtrr_ops vectors. */ |
| extern const struct mtrr_ops amd_mtrr_ops; |
| extern const struct mtrr_ops cyrix_mtrr_ops; |
| extern const struct mtrr_ops centaur_mtrr_ops; |
| |
| extern int changed_by_mtrr_cleanup; |
| extern int mtrr_cleanup(void); |
| |
| /* |
| * Must be used by code which uses mtrr_if to call platform-specific |
| * MTRR manipulation functions. |
| */ |
| static inline bool mtrr_enabled(void) |
| { |
| return !!mtrr_if; |
| } |
| void generic_rebuild_map(void); |