include/asm-powerpc/mmu-44x.h

   1 #ifndef _ASM_POWERPC_MMU_44X_H_
   2 #define _ASM_POWERPC_MMU_44X_H_
   3 /*
   4  * PPC440 support
   5  */
   6
   7 #define PPC44x_MMUCR_TID        0x000000ff
   8 #define PPC44x_MMUCR_STS        0x00010000
   9
  10 #define PPC44x_TLB_PAGEID       0
  11 #define PPC44x_TLB_XLAT         1
  12 #define PPC44x_TLB_ATTRIB       2
  13
  14 /* Page identification fields */
  15 #define PPC44x_TLB_EPN_MASK     0xfffffc00      /* Effective Page Number */
  16 #define PPC44x_TLB_VALID        0x00000200      /* Valid flag */
  17 #define PPC44x_TLB_TS           0x00000100      /* Translation address space */
  18 #define PPC44x_TLB_1K           0x00000000      /* Page sizes */
  19 #define PPC44x_TLB_4K           0x00000010
  20 #define PPC44x_TLB_16K          0x00000020
  21 #define PPC44x_TLB_64K          0x00000030
  22 #define PPC44x_TLB_256K         0x00000040
  23 #define PPC44x_TLB_1M           0x00000050
  24 #define PPC44x_TLB_16M          0x00000070
  25 #define PPC44x_TLB_256M         0x00000090
  26
  27 /* Translation fields */
  28 #define PPC44x_TLB_RPN_MASK     0xfffffc00      /* Real Page Number */
  29 #define PPC44x_TLB_ERPN_MASK    0x0000000f
  30
  31 /* Storage attribute and access control fields */
  32 #define PPC44x_TLB_ATTR_MASK    0x0000ff80
  33 #define PPC44x_TLB_U0           0x00008000      /* User 0 */
  34 #define PPC44x_TLB_U1           0x00004000      /* User 1 */
  35 #define PPC44x_TLB_U2           0x00002000      /* User 2 */
  36 #define PPC44x_TLB_U3           0x00001000      /* User 3 */
  37 #define PPC44x_TLB_W            0x00000800      /* Caching is write-through */
  38 #define PPC44x_TLB_I            0x00000400      /* Caching is inhibited */
  39 #define PPC44x_TLB_M            0x00000200      /* Memory is coherent */
  40 #define PPC44x_TLB_G            0x00000100      /* Memory is guarded */
  41 #define PPC44x_TLB_E            0x00000080      /* Memory is guarded */
  42
  43 #define PPC44x_TLB_PERM_MASK    0x0000003f
  44 #define PPC44x_TLB_UX           0x00000020      /* User execution */
  45 #define PPC44x_TLB_UW           0x00000010      /* User write */
  46 #define PPC44x_TLB_UR           0x00000008      /* User read */
  47 #define PPC44x_TLB_SX           0x00000004      /* Super execution */
  48 #define PPC44x_TLB_SW           0x00000002      /* Super write */
  49 #define PPC44x_TLB_SR           0x00000001      /* Super read */
  50
  51 /* Number of TLB entries */
  52 #define PPC44x_TLB_SIZE         64
  53
  54 #ifndef __ASSEMBLY__
  55
  56 typedef struct {
  57         unsigned long id;
  58         unsigned long vdso_base;
  59 } mm_context_t;
  60
  61 #endif /* !__ASSEMBLY__ */
  62
  63 #ifndef CONFIG_PPC_EARLY_DEBUG_44x
  64 #define PPC44x_EARLY_TLBS       1
  65 #else
  66 #define PPC44x_EARLY_TLBS       2
  67 #define PPC44x_EARLY_DEBUG_VIRTADDR     (ASM_CONST(0xf0000000) \
  68         | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
  69 #endif
  70
  71 /* Size of the TLBs used for pinning in lowmem */
  72 #define PPC_PIN_SIZE    (1 << 28)       /* 256M */
  73
  74 #endif /* _ASM_POWERPC_MMU_44X_H_ */