| Benjamin Herrenschmidt | c605782 | 2009-03-10 17:53:29 +0000 | [diff] [blame^] | 1 | #ifndef _ASM_POWERPC_PTE_HASH64_H |
| 2 | #define _ASM_POWERPC_PTE_HASH64_H |
| 3 | #ifdef __KERNEL__ |
| 4 | |
| 5 | /* |
| 6 | * Common bits between 4K and 64K pages in a linux-style PTE. |
| 7 | * These match the bits in the (hardware-defined) PowerPC PTE as closely |
| 8 | * as possible. Additional bits may be defined in pgtable-hash64-*.h |
| 9 | */ |
| 10 | #define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ |
| 11 | #define _PAGE_USER 0x0002 /* matches one of the PP bits */ |
| 12 | #define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ |
| 13 | #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ |
| 14 | #define _PAGE_GUARDED 0x0008 |
| 15 | #define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ |
| 16 | #define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ |
| 17 | #define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ |
| 18 | #define _PAGE_DIRTY 0x0080 /* C: page changed */ |
| 19 | #define _PAGE_ACCESSED 0x0100 /* R: page referenced */ |
| 20 | #define _PAGE_RW 0x0200 /* software: user write access allowed */ |
| 21 | #define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ |
| 22 | |
| 23 | /* Strong Access Ordering */ |
| 24 | #define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) |
| 25 | |
| 26 | #define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT) |
| 27 | |
| 28 | #define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY) |
| 29 | |
| 30 | /* PTEIDX nibble */ |
| 31 | #define _PTEIDX_SECONDARY 0x8 |
| 32 | #define _PTEIDX_GROUP_IX 0x7 |
| 33 | |
| 34 | #define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | \ |
| 35 | _PAGE_NO_CACHE | _PAGE_WRITETHRU | \ |
| 36 | _PAGE_4K_PFN | _PAGE_RW | _PAGE_USER | \ |
| 37 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_EXEC) |
| 38 | |
| 39 | |
| 40 | #ifdef CONFIG_PPC_64K_PAGES |
| 41 | #include <asm/pte-hash64-64k.h> |
| 42 | #else |
| 43 | #include <asm/pte-hash64-4k.h> |
| 44 | #endif |
| 45 | |
| 46 | #endif /* __KERNEL__ */ |
| 47 | #endif /* _ASM_POWERPC_PTE_HASH64_H */ |