arch/x86/kernel/cpu/mtrr/mtrr.h

Source file repositories/reference/linux-study-clean/arch/x86/kernel/cpu/mtrr/mtrr.h

File Facts

System
Linux kernel
Corpus path
arch/x86/kernel/cpu/mtrr/mtrr.h
Extension
.h
Size
2434 bytes
Lines
91
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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 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);

Annotation

Implementation Notes