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
13extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
14
15struct 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
31extern int generic_get_free_region(unsigned long base, unsigned long size,
32				   int replace_reg);
33extern int generic_validate_add_page(unsigned long base, unsigned long size,
34				     unsigned int type);
35
36extern const struct mtrr_ops generic_mtrr_ops;
37
38extern int positive_have_wrcomb(void);
39
40/* library functions for processor-specific routines */
41struct set_mtrr_context {
42	unsigned long	flags;
43	unsigned long	cr4val;
44	u32		deftype_lo;
45	u32		deftype_hi;
46	u32		ccr3;
47};
48
49void set_mtrr_done(struct set_mtrr_context *ctxt);
50void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
51void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
52
53void fill_mtrr_var_range(unsigned int index,
54		u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
55bool get_mtrr_state(void);
56void mtrr_bp_pat_init(void);
57
58extern void __init set_mtrr_ops(const struct mtrr_ops *ops);
59
60extern u64 size_or_mask, size_and_mask;
61extern 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
66extern unsigned int num_var_ranges;
67extern u64 mtrr_tom2;
68extern struct mtrr_state_type mtrr_state;
69
70void mtrr_state_warn(void);
71const char *mtrr_attrib_to_str(int x);
72void mtrr_wrmsr(unsigned, unsigned, unsigned);
73
74/* CPU specific mtrr init functions */
75int amd_init_mtrr(void);
76int cyrix_init_mtrr(void);
77int centaur_init_mtrr(void);
78
79extern int changed_by_mtrr_cleanup;
80extern int mtrr_cleanup(unsigned address_bits);

 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
13extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
14
15struct mtrr_ops {
16	u32	vendor;
 
17	void	(*set)(unsigned int reg, unsigned long base,
18		       unsigned long size, mtrr_type type);
 
 
19	void	(*get)(unsigned int reg, unsigned long *base,
20		       unsigned long *size, mtrr_type *type);
21	int	(*get_free_region)(unsigned long base, unsigned long size,
22				   int replace_reg);
23	int	(*validate_add_page)(unsigned long base, unsigned long size,
24				     unsigned int type);
25	int	(*have_wrcomb)(void);
26};
27
28extern int generic_get_free_region(unsigned long base, unsigned long size,
29				   int replace_reg);
30extern int generic_validate_add_page(unsigned long base, unsigned long size,
31				     unsigned int type);
32
33extern const struct mtrr_ops generic_mtrr_ops;
34
35extern int positive_have_wrcomb(void);
36
37/* library functions for processor-specific routines */
38struct set_mtrr_context {
39	unsigned long	flags;
40	unsigned long	cr4val;
41	u32		deftype_lo;
42	u32		deftype_hi;
43	u32		ccr3;
44};
45
46void set_mtrr_done(struct set_mtrr_context *ctxt);
47void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
48void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
49
50void fill_mtrr_var_range(unsigned int index,
51		u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
52bool get_mtrr_state(void);
 
 
 
53
54extern u64 size_or_mask, size_and_mask;
55extern const struct mtrr_ops *mtrr_if;
56
57#define is_cpu(vnd)	(mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
 
58
59extern unsigned int num_var_ranges;
60extern u64 mtrr_tom2;
61extern struct mtrr_state_type mtrr_state;
62
63void mtrr_state_warn(void);
64const char *mtrr_attrib_to_str(int x);
65void mtrr_wrmsr(unsigned, unsigned, unsigned);
66
67/* CPU specific mtrr_ops vectors. */
68extern const struct mtrr_ops amd_mtrr_ops;
69extern const struct mtrr_ops cyrix_mtrr_ops;
70extern const struct mtrr_ops centaur_mtrr_ops;
71
72extern int changed_by_mtrr_cleanup;
73extern int mtrr_cleanup(unsigned address_bits);