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

   1/*
   2 * local MTRR defines.
   3 */
   4
   5#include <linux/types.h>
   6#include <linux/stddef.h>
   7
   8#define MTRR_CHANGE_MASK_FIXED     0x01
   9#define MTRR_CHANGE_MASK_VARIABLE  0x02
  10#define MTRR_CHANGE_MASK_DEFTYPE   0x04
  11
  12extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
  13
  14struct mtrr_ops {
  15        u32     vendor;
  16        u32     use_intel_if;
  17        void    (*set)(unsigned int reg, unsigned long base,
  18                       unsigned long size, mtrr_type type);
  19        void    (*set_all)(void);
  20
  21        void    (*get)(unsigned int reg, unsigned long *base,
  22                       unsigned long *size, mtrr_type *type);
  23        int     (*get_free_region)(unsigned long base, unsigned long size,
  24                                   int replace_reg);
  25        int     (*validate_add_page)(unsigned long base, unsigned long size,
  26                                     unsigned int type);
  27        int     (*have_wrcomb)(void);
  28};
  29
  30extern int generic_get_free_region(unsigned long base, unsigned long size,
  31                                   int replace_reg);
  32extern int generic_validate_add_page(unsigned long base, unsigned long size,
  33                                     unsigned int type);
  34
  35extern struct mtrr_ops generic_mtrr_ops;
  36
  37extern int positive_have_wrcomb(void);
  38
  39/* library functions for processor-specific routines */
  40struct set_mtrr_context {
  41        unsigned long   flags;
  42        unsigned long   cr4val;
  43        u32             deftype_lo;
  44        u32             deftype_hi;
  45        u32             ccr3;
  46};
  47
  48void set_mtrr_done(struct set_mtrr_context *ctxt);
  49void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
  50void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
  51
  52void fill_mtrr_var_range(unsigned int index,
  53                u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
  54void get_mtrr_state(void);
  55
  56extern void set_mtrr_ops(struct mtrr_ops *ops);
  57
  58extern u64 size_or_mask, size_and_mask;
  59extern struct mtrr_ops *mtrr_if;
  60
  61#define is_cpu(vnd)     (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
  62#define use_intel()     (mtrr_if && mtrr_if->use_intel_if == 1)
  63
  64extern unsigned int num_var_ranges;
  65extern u64 mtrr_tom2;
  66extern struct mtrr_state_type mtrr_state;
  67
  68void mtrr_state_warn(void);
  69const char *mtrr_attrib_to_str(int x);
  70void mtrr_wrmsr(unsigned, unsigned, unsigned);
  71
  72/* CPU specific mtrr init functions */
  73int amd_init_mtrr(void);
  74int cyrix_init_mtrr(void);
  75int centaur_init_mtrr(void);
  76
  77extern int changed_by_mtrr_cleanup;
  78extern int mtrr_cleanup(unsigned address_bits);
  79