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- #ifndef _ASM_POWERPC_MMU_HASH32_H_
- #define _ASM_POWERPC_MMU_HASH32_H_
- /*
- * 32-bit hash table MMU support
- */
- /*
- * BATs
- */
- /* 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 */
- #ifndef __ASSEMBLY__
- /* Contort a phys_addr_t into the right format/bits for a BAT */
- #ifdef CONFIG_PHYS_64BIT
- #define BAT_PHYS_ADDR(x) ((u32)((x & 0x00000000fffe0000ULL) | \
- ((x & 0x0000000e00000000ULL) >> 24) | \
- ((x & 0x0000000100000000ULL) >> 30)))
- #else
- #define BAT_PHYS_ADDR(x) (x)
- #endif
- struct ppc_bat {
- u32 batu;
- u32 batl;
- };
- #endif /* !__ASSEMBLY__ */
- /*
- * Hash table
- */
- /* 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 */
- #ifndef __ASSEMBLY__
- /*
- * Hardware Page Table Entry
- * Note that the xpn and x bitfields are used only by processors that
- * support extended addressing; otherwise, those bits are reserved.
- */
- struct hash_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 xpn:3; /* Real page number bits 0-2, optional */
- 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 x:1; /* Real page number bit 3, optional */
- unsigned long pp:2; /* Page protection */
- };
- typedef struct {
- unsigned long id;
- unsigned long vdso_base;
- } mm_context_t;
- #endif /* !__ASSEMBLY__ */
- /* We happily ignore the smaller BATs on 601, we don't actually use
- * those definitions on hash32 at the moment anyway
- */
- #define mmu_virtual_psize MMU_PAGE_4K
- #define mmu_linear_psize MMU_PAGE_256M
- #endif /* _ASM_POWERPC_MMU_HASH32_H_ */
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