| #ifndef _ASM_POWERPC_PTE_HASH64_H | |
| #define _ASM_POWERPC_PTE_HASH64_H | |
| #ifdef __KERNEL__ | |
| /* | |
| * Common bits between 4K and 64K pages in a linux-style PTE. | |
| * These match the bits in the (hardware-defined) PowerPC PTE as closely | |
| * as possible. Additional bits may be defined in pgtable-hash64-*.h | |
| * | |
| * Note: We only support user read/write permissions. Supervisor always | |
| * have full read/write to pages above PAGE_OFFSET (pages below that | |
| * always use the user access permissions). | |
| * | |
| * We could create separate kernel read-only if we used the 3 PP bits | |
| * combinations that newer processors provide but we currently don't. | |
| */ | |
| #define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ | |
| #define _PAGE_USER 0x0002 /* matches one of the PP bits */ | |
| #define _PAGE_BIT_SWAP_TYPE 2 | |
| #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ | |
| #define _PAGE_GUARDED 0x0008 | |
| /* We can derive Memory coherence from _PAGE_NO_CACHE */ | |
| #define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ | |
| #define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ | |
| #define _PAGE_DIRTY 0x0080 /* C: page changed */ | |
| #define _PAGE_ACCESSED 0x0100 /* R: page referenced */ | |
| #define _PAGE_RW 0x0200 /* software: user write access allowed */ | |
| #define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ | |
| /* No separate kernel read-only */ | |
| #define _PAGE_KERNEL_RW (_PAGE_RW | _PAGE_DIRTY) /* user access blocked by key */ | |
| #define _PAGE_KERNEL_RO _PAGE_KERNEL_RW | |
| /* Strong Access Ordering */ | |
| #define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) | |
| /* No page size encoding in the linux PTE */ | |
| #define _PAGE_PSIZE 0 | |
| /* PTEIDX nibble */ | |
| #define _PTEIDX_SECONDARY 0x8 | |
| #define _PTEIDX_GROUP_IX 0x7 | |
| /* Hash table based platforms need atomic updates of the linux PTE */ | |
| #define PTE_ATOMIC_UPDATES 1 | |
| #ifdef CONFIG_PPC_64K_PAGES | |
| #include <asm/pte-hash64-64k.h> | |
| #else | |
| #include <asm/pte-hash64-4k.h> | |
| #endif | |
| #endif /* __KERNEL__ */ | |
| #endif /* _ASM_POWERPC_PTE_HASH64_H */ |