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 MTRRdefType_MSR 0x2ff
   9
  10 #define MTRRfix16K_A0000_MSR 0x259
  11 #define MTRRfix4K_C0000_MSR 0x268
  12 #define MTRRfix4K_C8000_MSR 0x269
  13 #define MTRRfix4K_D0000_MSR 0x26a
  14 #define MTRRfix4K_D8000_MSR 0x26b
  15 #define MTRRfix4K_E0000_MSR 0x26c
  16 #define MTRRfix4K_E8000_MSR 0x26d
  17 #define MTRRfix4K_F0000_MSR 0x26e
  18 #define MTRRfix4K_F8000_MSR 0x26f
  19
  20 #define MTRR_CHANGE_MASK_FIXED     0x01
  21 #define MTRR_CHANGE_MASK_VARIABLE  0x02
  22 #define MTRR_CHANGE_MASK_DEFTYPE   0x04
  23
  24 extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
  25
  26 struct mtrr_ops {
  27         u32     vendor;
  28         u32     use_intel_if;
  29 //      void    (*init)(void);
  30         void    (*set)(unsigned int reg, unsigned long base,
  31                        unsigned long size, mtrr_type type);
  32         void    (*set_all)(void);
  33
  34         void    (*get)(unsigned int reg, unsigned long *base,
  35                        unsigned long *size, mtrr_type * type);
  36         int     (*get_free_region)(unsigned long base, unsigned long size,
  37                                    int replace_reg);
  38         int     (*validate_add_page)(unsigned long base, unsigned long size,
  39                                      unsigned int type);
  40         int     (*have_wrcomb)(void);
  41 };
  42
  43 extern int generic_get_free_region(unsigned long base, unsigned long size,
  44                                    int replace_reg);
  45 extern int generic_validate_add_page(unsigned long base, unsigned long size,
  46                                      unsigned int type);
  47
  48 extern struct mtrr_ops generic_mtrr_ops;
  49
  50 extern int positive_have_wrcomb(void);
  51
  52 /* library functions for processor-specific routines */
  53 struct set_mtrr_context {
  54         unsigned long flags;
  55         unsigned long cr4val;
  56         u32 deftype_lo;
  57         u32 deftype_hi;
  58         u32 ccr3;
  59 };
  60
  61 void set_mtrr_done(struct set_mtrr_context *ctxt);
  62 void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
  63 void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
  64
  65 void fill_mtrr_var_range(unsigned int index,
  66                 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
  67 void get_mtrr_state(void);
  68
  69 extern void set_mtrr_ops(struct mtrr_ops * ops);
  70
  71 extern u64 size_or_mask, size_and_mask;
  72 extern struct mtrr_ops * mtrr_if;
  73
  74 #define is_cpu(vnd)     (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
  75 #define use_intel()     (mtrr_if && mtrr_if->use_intel_if == 1)
  76
  77 extern unsigned int num_var_ranges;
  78 extern u64 mtrr_tom2;
  79 extern struct mtrr_state_type mtrr_state;
  80
  81 void mtrr_state_warn(void);
  82 const char *mtrr_attrib_to_str(int x);
  83 void mtrr_wrmsr(unsigned, unsigned, unsigned);
  84
  85 /* CPU specific mtrr init functions */
  86 int amd_init_mtrr(void);
  87 int cyrix_init_mtrr(void);
  88 int centaur_init_mtrr(void);
  89
  90 extern int changed_by_mtrr_cleanup;
  91 extern int mtrr_cleanup(unsigned address_bits);