| #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_FILE 0x0002 /* (!present only) software: pte holds file offset */ |
| #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ |
| #define _PAGE_GUARDED 0x0008 |
| #define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ |
| #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 */ |
