linux/arch/powerpc/include/asm/pte-fsl-booke.h

#ifndef _ASM_POWERPC_PTE_FSL_BOOKE_H
#define _ASM_POWERPC_PTE_FSL_BOOKE_H
#ifdef __KERNEL__

/* PTE bit definitions for Freescale BookE SW loaded TLB MMU based
 * processors
 *
   MMU Assist Register 3:

   32 33 34 35 36  ... 50 51 52 53 54 55 56 57 58 59 60 61 62 63
   RPN......................  0  0 U0 U1 U2 U3 UX SX UW SW UR SR

   - PRESENT *must* be in the bottom three bits because swap cache
     entries use the top 29 bits.

   - FILE *must* be in the bottom three bits because swap cache
     entries use the top 29 bits.
*/

/* Definitions for FSL Book-E Cores */
#define _PAGE_PRESENT	0x00001	/* S: PTE contains a translation */
#define _PAGE_USER	0x00002	/* S: User page (maps to UR) */
#define _PAGE_FILE	0x00002	/* S: when !present: nonlinear file mapping */
#define _PAGE_RW	0x00004	/* S: Write permission (SW) */
#define _PAGE_DIRTY	0x00008	/* S: Page dirty */
#define _PAGE_HWEXEC	0x00010	/* H: SX permission */
#define _PAGE_ACCESSED	0x00020	/* S: Page referenced */

#define _PAGE_ENDIAN	0x00040	/* H: E bit */
#define _PAGE_GUARDED	0x00080	/* H: G bit */
#define _PAGE_COHERENT	0x00100	/* H: M bit */
#define _PAGE_NO_CACHE	0x00200	/* H: I bit */
#define _PAGE_WRITETHRU	0x00400	/* H: W bit */
#define _PAGE_SPECIAL	0x00800 /* S: Special page */

#ifdef CONFIG_PTE_64BIT
/* ERPN in a PTE never gets cleared, ignore it */
#define _PTE_NONE_MASK	0xffffffffffff0000ULL
/* We extend the size of the PTE flags area when using 64-bit PTEs */
#define PTE_RPN_SHIFT	(PAGE_SHIFT + 8)
#endif

#define _PMD_PRESENT	0
#define _PMD_PRESENT_MASK (PAGE_MASK)
#define _PMD_BAD	(~PAGE_MASK)

#endif /* __KERNEL__ */
#endif /*  _ASM_POWERPC_PTE_FSL_BOOKE_H */