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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_MMU_44X_H_
   3 #define _ASM_POWERPC_MMU_44X_H_
   4 /*
   5  * PPC440 support
   6  */
   7
   8 #include <asm/page.h>
   9
  10 #define PPC44x_MMUCR_TID        0x000000ff
  11 #define PPC44x_MMUCR_STS        0x00010000
  12
  13 #define PPC44x_TLB_PAGEID       0
  14 #define PPC44x_TLB_XLAT         1
  15 #define PPC44x_TLB_ATTRIB       2
  16
  17 /* Page identification fields */
  18 #define PPC44x_TLB_EPN_MASK     0xfffffc00      /* Effective Page Number */
  19 #define PPC44x_TLB_VALID        0x00000200      /* Valid flag */
  20 #define PPC44x_TLB_TS           0x00000100      /* Translation address space */
  21 #define PPC44x_TLB_1K           0x00000000      /* Page sizes */
  22 #define PPC44x_TLB_4K           0x00000010
  23 #define PPC44x_TLB_16K          0x00000020
  24 #define PPC44x_TLB_64K          0x00000030
  25 #define PPC44x_TLB_256K         0x00000040
  26 #define PPC44x_TLB_1M           0x00000050
  27 #define PPC44x_TLB_16M          0x00000070
  28 #define PPC44x_TLB_256M         0x00000090
  29
  30 /* Translation fields */
  31 #define PPC44x_TLB_RPN_MASK     0xfffffc00      /* Real Page Number */
  32 #define PPC44x_TLB_ERPN_MASK    0x0000000f
  33
  34 /* Storage attribute and access control fields */
  35 #define PPC44x_TLB_ATTR_MASK    0x0000ff80
  36 #define PPC44x_TLB_U0           0x00008000      /* User 0 */
  37 #define PPC44x_TLB_U1           0x00004000      /* User 1 */
  38 #define PPC44x_TLB_U2           0x00002000      /* User 2 */
  39 #define PPC44x_TLB_U3           0x00001000      /* User 3 */
  40 #define PPC44x_TLB_W            0x00000800      /* Caching is write-through */
  41 #define PPC44x_TLB_I            0x00000400      /* Caching is inhibited */
  42 #define PPC44x_TLB_M            0x00000200      /* Memory is coherent */
  43 #define PPC44x_TLB_G            0x00000100      /* Memory is guarded */
  44 #define PPC44x_TLB_E            0x00000080      /* Memory is little endian */
  45
  46 #define PPC44x_TLB_PERM_MASK    0x0000003f
  47 #define PPC44x_TLB_UX           0x00000020      /* User execution */
  48 #define PPC44x_TLB_UW           0x00000010      /* User write */
  49 #define PPC44x_TLB_UR           0x00000008      /* User read */
  50 #define PPC44x_TLB_SX           0x00000004      /* Super execution */
  51 #define PPC44x_TLB_SW           0x00000002      /* Super write */
  52 #define PPC44x_TLB_SR           0x00000001      /* Super read */
  53
  54 /* Number of TLB entries */
  55 #define PPC44x_TLB_SIZE         64
  56
  57 /* 47x bits */
  58 #define PPC47x_MMUCR_TID        0x0000ffff
  59 #define PPC47x_MMUCR_STS        0x00010000
  60
  61 /* Page identification fields */
  62 #define PPC47x_TLB0_EPN_MASK    0xfffff000      /* Effective Page Number */
  63 #define PPC47x_TLB0_VALID       0x00000800      /* Valid flag */
  64 #define PPC47x_TLB0_TS          0x00000400      /* Translation address space */
  65 #define PPC47x_TLB0_4K          0x00000000
  66 #define PPC47x_TLB0_16K         0x00000010
  67 #define PPC47x_TLB0_64K         0x00000030
  68 #define PPC47x_TLB0_1M          0x00000070
  69 #define PPC47x_TLB0_16M         0x000000f0
  70 #define PPC47x_TLB0_256M        0x000001f0
  71 #define PPC47x_TLB0_1G          0x000003f0
  72 #define PPC47x_TLB0_BOLTED_R    0x00000008      /* tlbre only */
  73
  74 /* Translation fields */
  75 #define PPC47x_TLB1_RPN_MASK    0xfffff000      /* Real Page Number */
  76 #define PPC47x_TLB1_ERPN_MASK   0x000003ff
  77
  78 /* Storage attribute and access control fields */
  79 #define PPC47x_TLB2_ATTR_MASK   0x0003ff80
  80 #define PPC47x_TLB2_IL1I        0x00020000      /* Memory is guarded */
  81 #define PPC47x_TLB2_IL1D        0x00010000      /* Memory is guarded */
  82 #define PPC47x_TLB2_U0          0x00008000      /* User 0 */
  83 #define PPC47x_TLB2_U1          0x00004000      /* User 1 */
  84 #define PPC47x_TLB2_U2          0x00002000      /* User 2 */
  85 #define PPC47x_TLB2_U3          0x00001000      /* User 3 */
  86 #define PPC47x_TLB2_W           0x00000800      /* Caching is write-through */
  87 #define PPC47x_TLB2_I           0x00000400      /* Caching is inhibited */
  88 #define PPC47x_TLB2_M           0x00000200      /* Memory is coherent */
  89 #define PPC47x_TLB2_G           0x00000100      /* Memory is guarded */
  90 #define PPC47x_TLB2_E           0x00000080      /* Memory is little endian */
  91 #define PPC47x_TLB2_PERM_MASK   0x0000003f
  92 #define PPC47x_TLB2_UX          0x00000020      /* User execution */
  93 #define PPC47x_TLB2_UW          0x00000010      /* User write */
  94 #define PPC47x_TLB2_UR          0x00000008      /* User read */
  95 #define PPC47x_TLB2_SX          0x00000004      /* Super execution */
  96 #define PPC47x_TLB2_SW          0x00000002      /* Super write */
  97 #define PPC47x_TLB2_SR          0x00000001      /* Super read */
  98 #define PPC47x_TLB2_U_RWX       (PPC47x_TLB2_UX|PPC47x_TLB2_UW|PPC47x_TLB2_UR)
  99 #define PPC47x_TLB2_S_RWX       (PPC47x_TLB2_SX|PPC47x_TLB2_SW|PPC47x_TLB2_SR)
 100 #define PPC47x_TLB2_S_RW        (PPC47x_TLB2_SW | PPC47x_TLB2_SR)
 101 #define PPC47x_TLB2_IMG         (PPC47x_TLB2_I | PPC47x_TLB2_M | PPC47x_TLB2_G)
 102
 103 #ifndef __ASSEMBLY__
 104
 105 extern unsigned int tlb_44x_hwater;
 106 extern unsigned int tlb_44x_index;
 107
 108 typedef struct {
 109         unsigned int    id;
 110         unsigned int    active;
 111         unsigned long   vdso_base;
 112 } mm_context_t;
 113
 114 #endif /* !__ASSEMBLY__ */
 115
 116 #ifndef CONFIG_PPC_EARLY_DEBUG_44x
 117 #define PPC44x_EARLY_TLBS       1
 118 #else
 119 #define PPC44x_EARLY_TLBS       2
 120 #define PPC44x_EARLY_DEBUG_VIRTADDR     (ASM_CONST(0xf0000000) \
 121         | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
 122 #endif
 123
 124 /* Size of the TLBs used for pinning in lowmem */
 125 #define PPC_PIN_SIZE    (1 << 28)       /* 256M */
 126
 127 #if (PAGE_SHIFT == 12)
 128 #define PPC44x_TLBE_SIZE        PPC44x_TLB_4K
 129 #define PPC47x_TLBE_SIZE        PPC47x_TLB0_4K
 130 #define mmu_virtual_psize       MMU_PAGE_4K
 131 #elif (PAGE_SHIFT == 14)
 132 #define PPC44x_TLBE_SIZE        PPC44x_TLB_16K
 133 #define PPC47x_TLBE_SIZE        PPC47x_TLB0_16K
 134 #define mmu_virtual_psize       MMU_PAGE_16K
 135 #elif (PAGE_SHIFT == 16)
 136 #define PPC44x_TLBE_SIZE        PPC44x_TLB_64K
 137 #define PPC47x_TLBE_SIZE        PPC47x_TLB0_64K
 138 #define mmu_virtual_psize       MMU_PAGE_64K
 139 #elif (PAGE_SHIFT == 18)
 140 #define PPC44x_TLBE_SIZE        PPC44x_TLB_256K
 141 #define mmu_virtual_psize       MMU_PAGE_256K
 142 #else
 143 #error "Unsupported PAGE_SIZE"
 144 #endif
 145
 146 #define mmu_linear_psize        MMU_PAGE_256M
 147
 148 #define PPC44x_PGD_OFF_SHIFT    (32 - PGDIR_SHIFT + PGD_T_LOG2)
 149 #define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2)
 150 #define PPC44x_PTE_ADD_SHIFT    (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2)
 151 #define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT)
 152
 153 #endif /* _ASM_POWERPC_MMU_44X_H_ */