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