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 MTRRcap_MSR     0x0fe
   9 #define MTRRdefType_MSR 0x2ff
  10
  11 #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
  12 #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
  13
  14 #define NUM_FIXED_RANGES 88
  15 #define MAX_VAR_RANGES 256
  16 #define MTRRfix64K_00000_MSR 0x250
  17 #define MTRRfix16K_80000_MSR 0x258
  18 #define MTRRfix16K_A0000_MSR 0x259
  19 #define MTRRfix4K_C0000_MSR 0x268
  20 #define MTRRfix4K_C8000_MSR 0x269
  21 #define MTRRfix4K_D0000_MSR 0x26a
  22 #define MTRRfix4K_D8000_MSR 0x26b
  23 #define MTRRfix4K_E0000_MSR 0x26c
  24 #define MTRRfix4K_E8000_MSR 0x26d
  25 #define MTRRfix4K_F0000_MSR 0x26e
  26 #define MTRRfix4K_F8000_MSR 0x26f
  27
  28 #define MTRR_CHANGE_MASK_FIXED     0x01
  29 #define MTRR_CHANGE_MASK_VARIABLE  0x02
  30 #define MTRR_CHANGE_MASK_DEFTYPE   0x04
  31
  32 /* In the Intel processor's MTRR interface, the MTRR type is always held in
  33    an 8 bit field: */
  34 typedef u8 mtrr_type;
  35
  36 extern unsigned int mtrr_usage_table[MAX_VAR_RANGES];
  37
  38 struct mtrr_ops {
  39         u32     vendor;
  40         u32     use_intel_if;
  41 //      void    (*init)(void);
  42         void    (*set)(unsigned int reg, unsigned long base,
  43                        unsigned long size, mtrr_type type);
  44         void    (*set_all)(void);
  45
  46         void    (*get)(unsigned int reg, unsigned long *base,
  47                        unsigned long *size, mtrr_type * type);
  48         int     (*get_free_region)(unsigned long base, unsigned long size,
  49                                    int replace_reg);
  50         int     (*validate_add_page)(unsigned long base, unsigned long size,
  51                                      unsigned int type);
  52         int     (*have_wrcomb)(void);
  53 };
  54
  55 extern int generic_get_free_region(unsigned long base, unsigned long size,
  56                                    int replace_reg);
  57 extern int generic_validate_add_page(unsigned long base, unsigned long size,
  58                                      unsigned int type);
  59
  60 extern struct mtrr_ops generic_mtrr_ops;
  61
  62 extern int positive_have_wrcomb(void);
  63
  64 /* library functions for processor-specific routines */
  65 struct set_mtrr_context {
  66         unsigned long flags;
  67         unsigned long cr4val;
  68         u32 deftype_lo;
  69         u32 deftype_hi;
  70         u32 ccr3;
  71 };
  72
  73 struct mtrr_var_range {
  74         u32 base_lo;
  75         u32 base_hi;
  76         u32 mask_lo;
  77         u32 mask_hi;
  78 };
  79
  80 void set_mtrr_done(struct set_mtrr_context *ctxt);
  81 void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
  82 void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
  83
  84 void fill_mtrr_var_range(unsigned int index,
  85                 u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
  86 void get_mtrr_state(void);
  87
  88 extern void set_mtrr_ops(struct mtrr_ops * ops);
  89
  90 extern u64 size_or_mask, size_and_mask;
  91 extern struct mtrr_ops * mtrr_if;
  92
  93 #define is_cpu(vnd)     (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
  94 #define use_intel()     (mtrr_if && mtrr_if->use_intel_if == 1)
  95
  96 extern unsigned int num_var_ranges;
  97 extern u64 mtrr_tom2;
  98
  99 void mtrr_state_warn(void);
 100 const char *mtrr_attrib_to_str(int x);
 101 void mtrr_wrmsr(unsigned, unsigned, unsigned);
 102
 103 /* CPU specific mtrr init functions */
 104 int amd_init_mtrr(void);
 105 int cyrix_init_mtrr(void);
 106 int centaur_init_mtrr(void);