1 #ifndef _ASM_POWERPC_MMU_8XX_H_ 2 #define _ASM_POWERPC_MMU_8XX_H_ 3 /* 4 * PPC8xx support 5 */ 6 7 /* Control/status registers for the MPC8xx. 8 * A write operation to these registers causes serialized access. 9 * During software tablewalk, the registers used perform mask/shift-add 10 * operations when written/read. A TLB entry is created when the Mx_RPN 11 * is written, and the contents of several registers are used to 12 * create the entry. 13 */ 14 #define SPRN_MI_CTR 784 /* Instruction TLB control register */ 15 #define MI_GPM 0x80000000 /* Set domain manager mode */ 16 #define MI_PPM 0x40000000 /* Set subpage protection */ 17 #define MI_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */ 18 #define MI_RSV4I 0x08000000 /* Reserve 4 TLB entries */ 19 #define MI_PPCS 0x02000000 /* Use MI_RPN prob/priv state */ 20 #define MI_IDXMASK 0x00001f00 /* TLB index to be loaded */ 21 #define MI_RESETVAL 0x00000000 /* Value of register at reset */ 22 23 /* These are the Ks and Kp from the PowerPC books. For proper operation, 24 * Ks = 0, Kp = 1. 25 */ 26 #define SPRN_MI_AP 786 27 #define MI_Ks 0x80000000 /* Should not be set */ 28 #define MI_Kp 0x40000000 /* Should always be set */ 29 30 /* The effective page number register. When read, contains the information 31 * about the last instruction TLB miss. When MI_RPN is written, bits in 32 * this register are used to create the TLB entry. 33 */ 34 #define SPRN_MI_EPN 787 35 #define MI_EPNMASK 0xfffff000 /* Effective page number for entry */ 36 #define MI_EVALID 0x00000200 /* Entry is valid */ 37 #define MI_ASIDMASK 0x0000000f /* ASID match value */ 38 /* Reset value is undefined */ 39 40 /* A "level 1" or "segment" or whatever you want to call it register. 41 * For the instruction TLB, it contains bits that get loaded into the 42 * TLB entry when the MI_RPN is written. 43 */ 44 #define SPRN_MI_TWC 789 45 #define MI_APG 0x000001e0 /* Access protection group (0) */ 46 #define MI_GUARDED 0x00000010 /* Guarded storage */ 47 #define MI_PSMASK 0x0000000c /* Mask of page size bits */ 48 #define MI_PS8MEG 0x0000000c /* 8M page size */ 49 #define MI_PS512K 0x00000004 /* 512K page size */ 50 #define MI_PS4K_16K 0x00000000 /* 4K or 16K page size */ 51 #define MI_SVALID 0x00000001 /* Segment entry is valid */ 52 /* Reset value is undefined */ 53 54 /* Real page number. Defined by the pte. Writing this register 55 * causes a TLB entry to be created for the instruction TLB, using 56 * additional information from the MI_EPN, and MI_TWC registers. 57 */ 58 #define SPRN_MI_RPN 790 59 60 /* Define an RPN value for mapping kernel memory to large virtual 61 * pages for boot initialization. This has real page number of 0, 62 * large page size, shared page, cache enabled, and valid. 63 * Also mark all subpages valid and write access. 64 */ 65 #define MI_BOOTINIT 0x000001fd 66 67 #define SPRN_MD_CTR 792 /* Data TLB control register */ 68 #define MD_GPM 0x80000000 /* Set domain manager mode */ 69 #define MD_PPM 0x40000000 /* Set subpage protection */ 70 #define MD_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */ 71 #define MD_WTDEF 0x10000000 /* Set writethrough when MMU dis */ 72 #define MD_RSV4I 0x08000000 /* Reserve 4 TLB entries */ 73 #define MD_TWAM 0x04000000 /* Use 4K page hardware assist */ 74 #define MD_PPCS 0x02000000 /* Use MI_RPN prob/priv state */ 75 #define MD_IDXMASK 0x00001f00 /* TLB index to be loaded */ 76 #define MD_RESETVAL 0x04000000 /* Value of register at reset */ 77 78 #define SPRN_M_CASID 793 /* Address space ID (context) to match */ 79 #define MC_ASIDMASK 0x0000000f /* Bits used for ASID value */ 80 81 82 /* These are the Ks and Kp from the PowerPC books. For proper operation, 83 * Ks = 0, Kp = 1. 84 */ 85 #define SPRN_MD_AP 794 86 #define MD_Ks 0x80000000 /* Should not be set */ 87 #define MD_Kp 0x40000000 /* Should always be set */ 88 89 /* The effective page number register. When read, contains the information 90 * about the last instruction TLB miss. When MD_RPN is written, bits in 91 * this register are used to create the TLB entry. 92 */ 93 #define SPRN_MD_EPN 795 94 #define MD_EPNMASK 0xfffff000 /* Effective page number for entry */ 95 #define MD_EVALID 0x00000200 /* Entry is valid */ 96 #define MD_ASIDMASK 0x0000000f /* ASID match value */ 97 /* Reset value is undefined */ 98 99 /* The pointer to the base address of the first level page table. 100 * During a software tablewalk, reading this register provides the address 101 * of the entry associated with MD_EPN. 102 */ 103 #define SPRN_M_TWB 796 104 #define M_L1TB 0xfffff000 /* Level 1 table base address */ 105 #define M_L1INDX 0x00000ffc /* Level 1 index, when read */ 106 /* Reset value is undefined */ 107 108 /* A "level 1" or "segment" or whatever you want to call it register. 109 * For the data TLB, it contains bits that get loaded into the TLB entry 110 * when the MD_RPN is written. It is also provides the hardware assist 111 * for finding the PTE address during software tablewalk. 112 */ 113 #define SPRN_MD_TWC 797 114 #define MD_L2TB 0xfffff000 /* Level 2 table base address */ 115 #define MD_L2INDX 0xfffffe00 /* Level 2 index (*pte), when read */ 116 #define MD_APG 0x000001e0 /* Access protection group (0) */ 117 #define MD_GUARDED 0x00000010 /* Guarded storage */ 118 #define MD_PSMASK 0x0000000c /* Mask of page size bits */ 119 #define MD_PS8MEG 0x0000000c /* 8M page size */ 120 #define MD_PS512K 0x00000004 /* 512K page size */ 121 #define MD_PS4K_16K 0x00000000 /* 4K or 16K page size */ 122 #define MD_WT 0x00000002 /* Use writethrough page attribute */ 123 #define MD_SVALID 0x00000001 /* Segment entry is valid */ 124 /* Reset value is undefined */ 125 126 127 /* Real page number. Defined by the pte. Writing this register 128 * causes a TLB entry to be created for the data TLB, using 129 * additional information from the MD_EPN, and MD_TWC registers. 130 */ 131 #define SPRN_MD_RPN 798 132 133 /* This is a temporary storage register that could be used to save 134 * a processor working register during a tablewalk. 135 */ 136 #define SPRN_M_TW 799 137 138 #ifndef __ASSEMBLY__ 139 typedef struct { 140 unsigned int id; 141 unsigned int active; 142 unsigned long vdso_base; 143 } mm_context_t; 144 #endif /* !__ASSEMBLY__ */ 145 146 #define mmu_virtual_psize MMU_PAGE_4K 147 #define mmu_linear_psize MMU_PAGE_8M 148 149 #endif /* _ASM_POWERPC_MMU_8XX_H_ */ 150