mmu.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:12k
- /*
- * BK Id: SCCS/s.mmu.h 1.10 06/28/01 15:50:17 paulus
- */
- /*
- * PowerPC memory management structures
- */
- #ifdef __KERNEL__
- #ifndef _PPC_MMU_H_
- #define _PPC_MMU_H_
- #include <linux/config.h>
- #ifndef __ASSEMBLY__
- /* Default "unsigned long" context */
- typedef unsigned long mm_context_t;
- /* Hardware Page Table Entry */
- typedef struct _PTE {
- #ifdef CONFIG_PPC64BRIDGE
- unsigned long long vsid:52;
- unsigned long api:5;
- unsigned long :5;
- unsigned long h:1;
- unsigned long v:1;
- unsigned long long rpn:52;
- #else /* CONFIG_PPC64BRIDGE */
- 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 */
- #endif /* CONFIG_PPC64BRIDGE */
- 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) */
- #ifdef CONFIG_PPC64BRIDGE
- unsigned long long bepi:47;
- #else /* CONFIG_PPC64BRIDGE */
- unsigned long bepi:15; /* Effective page index (virtual address) */
- #endif /* CONFIG_PPC64BRIDGE */
- 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) */
- #ifdef CONFIG_PPC64BRIDGE
- unsigned long long brpn:47;
- #else /* CONFIG_PPC64BRIDGE */
- unsigned long brpn:15; /* Real page index (physical address) */
- #endif /* CONFIG_PPC64BRIDGE */
- 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;
- extern void _tlbie(unsigned long va); /* invalidate a TLB entry */
- extern void _tlbia(void); /* invalidate all TLB entries */
- #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 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 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 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 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 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 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 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 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 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 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 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 MD_RPN 798
- /* This is a temporary storage register that could be used to save
- * a processor working register during a tablewalk.
- */
- #define 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 */
- #endif /* _PPC_MMU_H_ */
- #endif /* __KERNEL__ */