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 * Note: We only support user read/write permissions. Supervisor always 11 * have full read/write to pages above PAGE_OFFSET (pages below that 12 * always use the user access permissions). 13 * 14 * We could create separate kernel read-only if we used the 3 PP bits 15 * combinations that newer processors provide but we currently don't. 16 */ 17#define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ 18#define _PAGE_USER 0x0002 /* matches one of the PP bits */ 19#define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ 20#define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ 21#define _PAGE_GUARDED 0x0008 22#define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ 23#define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ 24#define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ 25#define _PAGE_DIRTY 0x0080 /* C: page changed */ 26#define _PAGE_ACCESSED 0x0100 /* R: page referenced */ 27#define _PAGE_RW 0x0200 /* software: user write access allowed */ 28#define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ 29 30/* No separate kernel read-only */ 31#define _PAGE_KERNEL_RW (_PAGE_RW | _PAGE_DIRTY) /* user access blocked by key */ 32#define _PAGE_KERNEL_RO _PAGE_KERNEL_RW 33 34/* Strong Access Ordering */ 35#define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) 36 37/* No page size encoding in the linux PTE */ 38#define _PAGE_PSIZE 0 39 40/* PTEIDX nibble */ 41#define _PTEIDX_SECONDARY 0x8 42#define _PTEIDX_GROUP_IX 0x7 43 44/* Hash table based platforms need atomic updates of the linux PTE */ 45#define PTE_ATOMIC_UPDATES 1 46 47#ifdef CONFIG_PPC_64K_PAGES 48#include <asm/pte-hash64-64k.h> 49#else 50#include <asm/pte-hash64-4k.h> 51#endif 52 53#endif /* __KERNEL__ */ 54#endif /* _ASM_POWERPC_PTE_HASH64_H */ 55