pte-hash64.h

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#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 */