/* Control/status registers for the MPC8xx. *Awriteoperationtotheseregisterscausesserializedaccess. *Duringsoftwaretablewalk,theregistersusedperformmask/shift-add *operationswhenwritten/read.ATLBentryiscreatedwhentheMx_RPN *iswritten,andthecontentsofseveralregistersareusedto *createtheentry.
*/ #define SPRN_MI_CTR 784/* Instruction TLB control register */ #define MI_GPM 0x80000000 /* Set domain manager mode */ #define MI_PPM 0x40000000 /* Set subpage protection */ #define MI_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */ #define MI_RSV4I 0x08000000 /* Reserve 4 TLB entries */ #define MI_PPCS 0x02000000 /* Use MI_RPN prob/priv state */ #define MI_IDXMASK 0x00001f00 /* TLB index to be loaded */
/* These are the Ks and Kp from the PowerPC books. For proper operation, *Ks=0,Kp=1.
*/ #define SPRN_MI_AP 786 #define MI_Ks 0x80000000 /* Should not be set */ #define MI_Kp 0x40000000 /* Should always be set */
/* The effective page number register. When read, contains the information *aboutthelastinstructionTLBmiss.WhenMI_RPNiswritten,bitsin *thisregisterareusedtocreatetheTLBentry.
*/ #define SPRN_MI_EPN 787 #define MI_EPNMASK 0xfffff000 /* Effective page number for entry */ #define MI_EVALID 0x00000200 /* Entry is valid */ #define MI_ASIDMASK 0x0000000f /* ASID match value */ /* Reset value is undefined */
/* A "level 1" or "segment" or whatever you want to call it register. *FortheinstructionTLB,itcontainsbitsthatgetloadedintothe *TLBentrywhentheMI_RPNiswritten.
*/ #define SPRN_MI_TWC 789 #define MI_APG 0x000001e0 /* Access protection group (0) */ #define MI_GUARDED 0x00000010 /* Guarded storage */ #define MI_PSMASK 0x0000000c /* Mask of page size bits */ #define MI_PS8MEG 0x0000000c /* 8M page size */ #define MI_PS512K 0x00000004 /* 512K page size */ #define MI_PS4K_16K 0x00000000 /* 4K or 16K page size */ #define MI_SVALID 0x00000001 /* Segment entry is valid */ /* Reset value is undefined */
/* Real page number. Defined by the pte. Writing this register *causesaTLBentrytobecreatedfortheinstructionTLB,using *additionalinformationfromtheMI_EPN,andMI_TWCregisters.
*/ #define SPRN_MI_RPN 790 #define MI_SPS16K 0x00000008 /* Small page size (0 = 4k, 1 = 16k) */
/* Define an RPN value for mapping kernel memory to large virtual *pagesforbootinitialization.Thishasrealpagenumberof0, *largepagesize,sharedpage,cacheenabled,andvalid. *Alsomarkallsubpagesvalidandwriteaccess.
*/ #define MI_BOOTINIT 0x000001fd
#define SPRN_MD_CTR 792/* Data TLB control register */ #define MD_GPM 0x80000000 /* Set domain manager mode */ #define MD_PPM 0x40000000 /* Set subpage protection */ #define MD_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */ #define MD_WTDEF 0x10000000 /* Set writethrough when MMU dis */ #define MD_RSV4I 0x08000000 /* Reserve 4 TLB entries */ #define MD_TWAM 0x04000000 /* Use 4K page hardware assist */ #define MD_PPCS 0x02000000 /* Use MI_RPN prob/priv state */ #define MD_IDXMASK 0x00001f00 /* TLB index to be loaded */
#define SPRN_M_CASID 793/* Address space ID (context) to match */ #define MC_ASIDMASK 0x0000000f /* Bits used for ASID value */
/* These are the Ks and Kp from the PowerPC books. For proper operation, *Ks=0,Kp=1.
*/ #define SPRN_MD_AP 794 #define MD_Ks 0x80000000 /* Should not be set */ #define MD_Kp 0x40000000 /* Should always be set */
/* See explanation above at the definition of MI_APG_INIT */ #define MD_APG_INIT 0xdc000000 #define MD_APG_KUAP 0xde000000
/* The effective page number register. When read, contains the information *aboutthelastinstructionTLBmiss.WhenMD_RPNiswritten,bitsin *thisregisterareusedtocreatetheTLBentry.
*/ #define SPRN_MD_EPN 795 #define MD_EPNMASK 0xfffff000 /* Effective page number for entry */ #define MD_EVALID 0x00000200 /* Entry is valid */ #define MD_ASIDMASK 0x0000000f /* ASID match value */ /* Reset value is undefined */
/* The pointer to the base address of the first level page table. *Duringasoftwaretablewalk,readingthisregisterprovidestheaddress *oftheentryassociatedwithMD_EPN.
*/ #define SPRN_M_TWB 796 #define M_L1TB 0xfffff000 /* Level 1 table base address */ #define M_L1INDX 0x00000ffc /* Level 1 index, when read */ /* Reset value is undefined */
/* A "level 1" or "segment" or whatever you want to call it register. *ForthedataTLB,itcontainsbitsthatgetloadedintotheTLBentry *whentheMD_RPNiswritten.Itisalsoprovidesthehardwareassist *forfindingthePTEaddressduringsoftwaretablewalk.
*/ #define SPRN_MD_TWC 797 #define MD_L2TB 0xfffff000 /* Level 2 table base address */ #define MD_L2INDX 0xfffffe00 /* Level 2 index (*pte), when read */ #define MD_APG 0x000001e0 /* Access protection group (0) */ #define MD_GUARDED 0x00000010 /* Guarded storage */ #define MD_PSMASK 0x0000000c /* Mask of page size bits */ #define MD_PS8MEG 0x0000000c /* 8M page size */ #define MD_PS512K 0x00000004 /* 512K page size */ #define MD_PS4K_16K 0x00000000 /* 4K or 16K page size */ #define MD_WT 0x00000002 /* Use writethrough page attribute */ #define MD_SVALID 0x00000001 /* Segment entry is valid */ /* Reset value is undefined */
/* Real page number. Defined by the pte. Writing this register *causesaTLBentrytobecreatedforthedataTLB,using *additionalinformationfromtheMD_EPN,andMD_TWCregisters.
*/ #define SPRN_MD_RPN 798 #define MD_SPS16K 0x00000008 /* Small page size (0 = 4k, 1 = 16k) */
/* This is a temporary storage register that could be used to save *aprocessorworkingregisterduringatablewalk.
*/ #define SPRN_M_TW 799
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