arch/i386/kernel/cpu/mtrr/mtrr.h

   1 /*
   2  * local mtrr defines.
   3  */
   4
   5 #ifndef TRUE
   6 #define TRUE  1
   7 #define FALSE 0
   8 #endif
   9
  10 #define MTRRcap_MSR     0x0fe
  11 #define MTRRdefType_MSR 0x2ff
  12
  13 #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
  14 #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
  15
  16 #define NUM_FIXED_RANGES 88
  17 #define MTRRfix64K_00000_MSR 0x250
  18 #define MTRRfix16K_80000_MSR 0x258
  19 #define MTRRfix16K_A0000_MSR 0x259
  20 #define MTRRfix4K_C0000_MSR 0x268
  21 #define MTRRfix4K_C8000_MSR 0x269
  22 #define MTRRfix4K_D0000_MSR 0x26a
  23 #define MTRRfix4K_D8000_MSR 0x26b
  24 #define MTRRfix4K_E0000_MSR 0x26c
  25 #define MTRRfix4K_E8000_MSR 0x26d
  26 #define MTRRfix4K_F0000_MSR 0x26e
  27 #define MTRRfix4K_F8000_MSR 0x26f
  28
  29 #define MTRR_CHANGE_MASK_FIXED     0x01
  30 #define MTRR_CHANGE_MASK_VARIABLE  0x02
  31 #define MTRR_CHANGE_MASK_DEFTYPE   0x04
  32
  33 /* In the Intel processor's MTRR interface, the MTRR type is always held in
  34    an 8 bit field: */
  35 typedef u8 mtrr_type;
  36
  37 struct mtrr_ops {
  38         u32     vendor;
  39         u32     use_intel_if;
  40 //      void    (*init)(void);
  41         void    (*set)(unsigned int reg, unsigned long base,
  42                        unsigned long size, mtrr_type type);
  43         void    (*set_all)(void);
  44
  45         void    (*get)(unsigned int reg, unsigned long *base,
  46                        unsigned long *size, mtrr_type * type);
  47         int     (*get_free_region)(unsigned long base, unsigned long size,
  48                                    int replace_reg);
  49         int     (*validate_add_page)(unsigned long base, unsigned long size,
  50                                      unsigned int type);
  51         int     (*have_wrcomb)(void);
  52 };
  53
  54 extern int generic_get_free_region(unsigned long base, unsigned long size,
  55                                    int replace_reg);
  56 extern int generic_validate_add_page(unsigned long base, unsigned long size,
  57                                      unsigned int type);
  58
  59 extern struct mtrr_ops generic_mtrr_ops;
  60
  61 extern int positive_have_wrcomb(void);
  62
  63 /* library functions for processor-specific routines */
  64 struct set_mtrr_context {
  65         unsigned long flags;
  66         unsigned long cr4val;
  67         u32 deftype_lo;
  68         u32 deftype_hi;
  69         u32 ccr3;
  70 };
  71
  72 struct mtrr_var_range {
  73         u32 base_lo;
  74         u32 base_hi;
  75         u32 mask_lo;
  76         u32 mask_hi;
  77 };
  78
  79 void set_mtrr_done(struct set_mtrr_context *ctxt);
  80 void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
  81 void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
  82
  83 void get_mtrr_state(void);
  84
  85 extern void set_mtrr_ops(struct mtrr_ops * ops);
  86
  87 extern u32 size_or_mask, size_and_mask;
  88 extern struct mtrr_ops * mtrr_if;
  89
  90 #define is_cpu(vnd)     (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
  91 #define use_intel()     (mtrr_if && mtrr_if->use_intel_if == 1)
  92
  93 extern unsigned int num_var_ranges;
  94
  95 void mtrr_state_warn(void);
  96 const char *mtrr_attrib_to_str(int x);
  97 void mtrr_wrmsr(unsigned, unsigned, unsigned);
  98