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