| /* |
| * PowerPC memory management structures |
| */ |
| |
| #ifdef __KERNEL__ |
| #ifndef _PPC_MMU_H_ |
| #define _PPC_MMU_H_ |
| |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * Define physical address type. Machines using split size |
| * virtual/physical addressing like 32-bit virtual / 36-bit |
| * physical need a larger than native word size type. -Matt |
| */ |
| #ifndef CONFIG_PHYS_64BIT |
| typedef unsigned long phys_addr_t; |
| #define PHYS_FMT "%.8lx" |
| #else |
| typedef unsigned long long phys_addr_t; |
| extern phys_addr_t fixup_bigphys_addr(phys_addr_t, phys_addr_t); |
| #define PHYS_FMT "%16Lx" |
| #endif |
| |
| typedef struct { |
| unsigned long id; |
| unsigned long vdso_base; |
| } mm_context_t; |
| |
| /* Hardware Page Table Entry */ |
| typedef struct _PTE { |
| unsigned long v:1; /* Entry is valid */ |
| unsigned long vsid:24; /* Virtual segment identifier */ |
| unsigned long h:1; /* Hash algorithm indicator */ |
| unsigned long api:6; /* Abbreviated page index */ |
| unsigned long rpn:20; /* Real (physical) page number */ |
| unsigned long :3; /* Unused */ |
| unsigned long r:1; /* Referenced */ |
| unsigned long c:1; /* Changed */ |
| unsigned long w:1; /* Write-thru cache mode */ |
| unsigned long i:1; /* Cache inhibited */ |
| unsigned long m:1; /* Memory coherence */ |
| unsigned long g:1; /* Guarded */ |
| unsigned long :1; /* Unused */ |
| unsigned long pp:2; /* Page protection */ |
| } PTE; |
| |
| /* Values for PP (assumes Ks=0, Kp=1) */ |
| #define PP_RWXX 0 /* Supervisor read/write, User none */ |
| #define PP_RWRX 1 /* Supervisor read/write, User read */ |
| #define PP_RWRW 2 /* Supervisor read/write, User read/write */ |
| #define PP_RXRX 3 /* Supervisor read, User read */ |
| |
| /* Segment Register */ |
| typedef struct _SEGREG { |
| unsigned long t:1; /* Normal or I/O type */ |
| unsigned long ks:1; /* Supervisor 'key' (normally 0) */ |
| unsigned long kp:1; /* User 'key' (normally 1) */ |
| unsigned long n:1; /* No-execute */ |
| unsigned long :4; /* Unused */ |
| unsigned long vsid:24; /* Virtual Segment Identifier */ |
| } SEGREG; |
| |
| /* Block Address Translation (BAT) Registers */ |
| typedef struct _P601_BATU { /* Upper part of BAT for 601 processor */ |
| unsigned long bepi:15; /* Effective page index (virtual address) */ |
| unsigned long :8; /* unused */ |
| unsigned long w:1; |
| unsigned long i:1; /* Cache inhibit */ |
| unsigned long m:1; /* Memory coherence */ |
| unsigned long ks:1; /* Supervisor key (normally 0) */ |
| unsigned long kp:1; /* User key (normally 1) */ |
| unsigned long pp:2; /* Page access protections */ |
| } P601_BATU; |
| |
| typedef struct _BATU { /* Upper part of BAT (all except 601) */ |
| unsigned long bepi:15; /* Effective page index (virtual address) */ |
| unsigned long :4; /* Unused */ |
| unsigned long bl:11; /* Block size mask */ |
| unsigned long vs:1; /* Supervisor valid */ |
| unsigned long vp:1; /* User valid */ |
| } BATU; |
| |
| typedef struct _P601_BATL { /* Lower part of BAT for 601 processor */ |
| unsigned long brpn:15; /* Real page index (physical address) */ |
| unsigned long :10; /* Unused */ |
| unsigned long v:1; /* Valid bit */ |
| unsigned long bl:6; /* Block size mask */ |
| } P601_BATL; |
| |
| typedef struct _BATL { /* Lower part of BAT (all except 601) */ |
| unsigned long brpn:15; /* Real page index (physical address) */ |
| unsigned long :10; /* Unused */ |
| unsigned long w:1; /* Write-thru cache */ |
| unsigned long i:1; /* Cache inhibit */ |
| unsigned long m:1; /* Memory coherence */ |
| unsigned long g:1; /* Guarded (MBZ in IBAT) */ |
| unsigned long :1; /* Unused */ |
| unsigned long pp:2; /* Page access protections */ |
| } BATL; |
| |
| typedef struct _BAT { |
| BATU batu; /* Upper register */ |
| BATL batl; /* Lower register */ |
| } BAT; |
| |
| typedef struct _P601_BAT { |
| P601_BATU batu; /* Upper register */ |
| P601_BATL batl; /* Lower register */ |
| } P601_BAT; |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| /* Block size masks */ |
| #define BL_128K 0x000 |
| #define BL_256K 0x001 |
| #define BL_512K 0x003 |
| #define BL_1M 0x007 |
| #define BL_2M 0x00F |
| #define BL_4M 0x01F |
| #define BL_8M 0x03F |
| #define BL_16M 0x07F |
| #define BL_32M 0x0FF |
| #define BL_64M 0x1FF |
| #define BL_128M 0x3FF |
| #define BL_256M 0x7FF |
| |
| /* BAT Access Protection */ |
| #define BPP_XX 0x00 /* No access */ |
| #define BPP_RX 0x01 /* Read only */ |
| #define BPP_RW 0x02 /* Read/write */ |
| |
| /* Control/status registers for the MPC8xx. |
| * A write operation to these registers causes serialized access. |
| * During software tablewalk, the registers used perform mask/shift-add |
| * operations when written/read. A TLB entry is created when the Mx_RPN |
| * is written, and the contents of several registers are used to |
| * create the entry. |
| */ |
| #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 */ |
| #define MI_RESETVAL 0x00000000 /* Value of register at reset */ |
| |
| /* 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 |
| * about the last instruction TLB miss. When MI_RPN is written, bits in |
| * this register are used to create the TLB entry. |
| */ |
| #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. |
| * For the instruction TLB, it contains bits that get loaded into the |
| * TLB entry when the MI_RPN is written. |
| */ |
| #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 |
| * causes a TLB entry to be created for the instruction TLB, using |
| * additional information from the MI_EPN, and MI_TWC registers. |
| */ |
| #define SPRN_MI_RPN 790 |
| |
| /* Define an RPN value for mapping kernel memory to large virtual |
| * pages for boot initialization. This has real page number of 0, |
| * large page size, shared page, cache enabled, and valid. |
| * Also mark all subpages valid and write access. |
| */ |
| #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 MD_RESETVAL 0x04000000 /* Value of register at reset */ |
| |
| #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 */ |
| |
| /* The effective page number register. When read, contains the information |
| * about the last instruction TLB miss. When MD_RPN is written, bits in |
| * this register are used to create the TLB entry. |
| */ |
| #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. |
| * During a software tablewalk, reading this register provides the address |
| * of the entry associated with MD_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. |
| * For the data TLB, it contains bits that get loaded into the TLB entry |
| * when the MD_RPN is written. It is also provides the hardware assist |
| * for finding the PTE address during software tablewalk. |
| */ |
| #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 |
| * causes a TLB entry to be created for the data TLB, using |
| * additional information from the MD_EPN, and MD_TWC registers. |
| */ |
| #define SPRN_MD_RPN 798 |
| |
| /* This is a temporary storage register that could be used to save |
| * a processor working register during a tablewalk. |
| */ |
| #define SPRN_M_TW 799 |
| |
| /* |
| * At present, all PowerPC 400-class processors share a similar TLB |
| * architecture. The instruction and data sides share a unified, |
| * 64-entry, fully-associative TLB which is maintained totally under |
| * software control. In addition, the instruction side has a |
| * hardware-managed, 4-entry, fully- associative TLB which serves as a |
| * first level to the shared TLB. These two TLBs are known as the UTLB |
| * and ITLB, respectively. |
| */ |
| |
| #define PPC4XX_TLB_SIZE 64 |
| |
| /* |
| * TLB entries are defined by a "high" tag portion and a "low" data |
| * portion. On all architectures, the data portion is 32-bits. |
| * |
| * TLB entries are managed entirely under software control by reading, |
| * writing, and searchoing using the 4xx-specific tlbre, tlbwr, and tlbsx |
| * instructions. |
| */ |
| |
| #define TLB_LO 1 |
| #define TLB_HI 0 |
| |
| #define TLB_DATA TLB_LO |
| #define TLB_TAG TLB_HI |
| |
| /* Tag portion */ |
| |
| #define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */ |
| #define TLB_PAGESZ_MASK 0x00000380 |
| #define TLB_PAGESZ(x) (((x) & 0x7) << 7) |
| #define PAGESZ_1K 0 |
| #define PAGESZ_4K 1 |
| #define PAGESZ_16K 2 |
| #define PAGESZ_64K 3 |
| #define PAGESZ_256K 4 |
| #define PAGESZ_1M 5 |
| #define PAGESZ_4M 6 |
| #define PAGESZ_16M 7 |
| #define TLB_VALID 0x00000040 /* Entry is valid */ |
| |
| /* Data portion */ |
| |
| #define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */ |
| #define TLB_PERM_MASK 0x00000300 |
| #define TLB_EX 0x00000200 /* Instruction execution allowed */ |
| #define TLB_WR 0x00000100 /* Writes permitted */ |
| #define TLB_ZSEL_MASK 0x000000F0 |
| #define TLB_ZSEL(x) (((x) & 0xF) << 4) |
| #define TLB_ATTR_MASK 0x0000000F |
| #define TLB_W 0x00000008 /* Caching is write-through */ |
| #define TLB_I 0x00000004 /* Caching is inhibited */ |
| #define TLB_M 0x00000002 /* Memory is coherent */ |
| #define TLB_G 0x00000001 /* Memory is guarded from prefetch */ |
| |
| /* |
| * PPC440 support |
| */ |
| #define PPC44x_MMUCR_TID 0x000000ff |
| #define PPC44x_MMUCR_STS 0x00010000 |
| |
| #define PPC44x_TLB_PAGEID 0 |
| #define PPC44x_TLB_XLAT 1 |
| #define PPC44x_TLB_ATTRIB 2 |
| |
| /* Page identification fields */ |
| #define PPC44x_TLB_EPN_MASK 0xfffffc00 /* Effective Page Number */ |
| #define PPC44x_TLB_VALID 0x00000200 /* Valid flag */ |
| #define PPC44x_TLB_TS 0x00000100 /* Translation address space */ |
| #define PPC44x_TLB_1K 0x00000000 /* Page sizes */ |
| #define PPC44x_TLB_4K 0x00000010 |
| #define PPC44x_TLB_16K 0x00000020 |
| #define PPC44x_TLB_64K 0x00000030 |
| #define PPC44x_TLB_256K 0x00000040 |
| #define PPC44x_TLB_1M 0x00000050 |
| #define PPC44x_TLB_16M 0x00000070 |
| #define PPC44x_TLB_256M 0x00000090 |
| |
| /* Translation fields */ |
| #define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */ |
| #define PPC44x_TLB_ERPN_MASK 0x0000000f |
| |
| /* Storage attribute and access control fields */ |
| #define PPC44x_TLB_ATTR_MASK 0x0000ff80 |
| #define PPC44x_TLB_U0 0x00008000 /* User 0 */ |
| #define PPC44x_TLB_U1 0x00004000 /* User 1 */ |
| #define PPC44x_TLB_U2 0x00002000 /* User 2 */ |
| #define PPC44x_TLB_U3 0x00001000 /* User 3 */ |
| #define PPC44x_TLB_W 0x00000800 /* Caching is write-through */ |
| #define PPC44x_TLB_I 0x00000400 /* Caching is inhibited */ |
| #define PPC44x_TLB_M 0x00000200 /* Memory is coherent */ |
| #define PPC44x_TLB_G 0x00000100 /* Memory is guarded */ |
| #define PPC44x_TLB_E 0x00000080 /* Memory is guarded */ |
| |
| #define PPC44x_TLB_PERM_MASK 0x0000003f |
| #define PPC44x_TLB_UX 0x00000020 /* User execution */ |
| #define PPC44x_TLB_UW 0x00000010 /* User write */ |
| #define PPC44x_TLB_UR 0x00000008 /* User read */ |
| #define PPC44x_TLB_SX 0x00000004 /* Super execution */ |
| #define PPC44x_TLB_SW 0x00000002 /* Super write */ |
| #define PPC44x_TLB_SR 0x00000001 /* Super read */ |
| |
| /* Book-E defined page sizes */ |
| #define BOOKE_PAGESZ_1K 0 |
| #define BOOKE_PAGESZ_4K 1 |
| #define BOOKE_PAGESZ_16K 2 |
| #define BOOKE_PAGESZ_64K 3 |
| #define BOOKE_PAGESZ_256K 4 |
| #define BOOKE_PAGESZ_1M 5 |
| #define BOOKE_PAGESZ_4M 6 |
| #define BOOKE_PAGESZ_16M 7 |
| #define BOOKE_PAGESZ_64M 8 |
| #define BOOKE_PAGESZ_256M 9 |
| #define BOOKE_PAGESZ_1GB 10 |
| #define BOOKE_PAGESZ_4GB 11 |
| #define BOOKE_PAGESZ_16GB 12 |
| #define BOOKE_PAGESZ_64GB 13 |
| #define BOOKE_PAGESZ_256GB 14 |
| #define BOOKE_PAGESZ_1TB 15 |
| |
| /* |
| * Freescale Book-E MMU support |
| */ |
| |
| #define MAS0_TLBSEL(x) ((x << 28) & 0x30000000) |
| #define MAS0_ESEL(x) ((x << 16) & 0x0FFF0000) |
| #define MAS0_NV(x) ((x) & 0x00000FFF) |
| |
| #define MAS1_VALID 0x80000000 |
| #define MAS1_IPROT 0x40000000 |
| #define MAS1_TID(x) ((x << 16) & 0x3FFF0000) |
| #define MAS1_TS 0x00001000 |
| #define MAS1_TSIZE(x) ((x << 8) & 0x00000F00) |
| |
| #define MAS2_EPN 0xFFFFF000 |
| #define MAS2_X0 0x00000040 |
| #define MAS2_X1 0x00000020 |
| #define MAS2_W 0x00000010 |
| #define MAS2_I 0x00000008 |
| #define MAS2_M 0x00000004 |
| #define MAS2_G 0x00000002 |
| #define MAS2_E 0x00000001 |
| |
| #define MAS3_RPN 0xFFFFF000 |
| #define MAS3_U0 0x00000200 |
| #define MAS3_U1 0x00000100 |
| #define MAS3_U2 0x00000080 |
| #define MAS3_U3 0x00000040 |
| #define MAS3_UX 0x00000020 |
| #define MAS3_SX 0x00000010 |
| #define MAS3_UW 0x00000008 |
| #define MAS3_SW 0x00000004 |
| #define MAS3_UR 0x00000002 |
| #define MAS3_SR 0x00000001 |
| |
| #define MAS4_TLBSELD(x) MAS0_TLBSEL(x) |
| #define MAS4_TIDDSEL 0x000F0000 |
| #define MAS4_TSIZED(x) MAS1_TSIZE(x) |
| #define MAS4_X0D 0x00000040 |
| #define MAS4_X1D 0x00000020 |
| #define MAS4_WD 0x00000010 |
| #define MAS4_ID 0x00000008 |
| #define MAS4_MD 0x00000004 |
| #define MAS4_GD 0x00000002 |
| #define MAS4_ED 0x00000001 |
| |
| #define MAS6_SPID0 0x3FFF0000 |
| #define MAS6_SPID1 0x00007FFE |
| #define MAS6_SAS 0x00000001 |
| #define MAS6_SPID MAS6_SPID0 |
| |
| #define MAS7_RPN 0xFFFFFFFF |
| |
| #endif /* _PPC_MMU_H_ */ |
| #endif /* __KERNEL__ */ |
