| Benjamin Herrenschmidt | 57e2a99 | 2009-07-28 11:59:34 +1000 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_PTE_BOOK3E_H |
| 2 | #define _ASM_POWERPC_PTE_BOOK3E_H |
| 3 | #ifdef __KERNEL__ |
| 4 | |
| 5 | /* PTE bit definitions for processors compliant to the Book3E |
| 6 | * architecture 2.06 or later. The position of the PTE bits |
| 7 | * matches the HW definition of the optional Embedded Page Table |
| 8 | * category. |
| 9 | */ |
| 10 | |
| 11 | /* Architected bits */ |
| 12 | #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */ |
| 13 | #define _PAGE_FILE 0x000002 /* (!present only) software: pte holds file offset */ |
| 14 | #define _PAGE_SW1 0x000002 |
| 15 | #define _PAGE_BAP_SR 0x000004 |
| 16 | #define _PAGE_BAP_UR 0x000008 |
| 17 | #define _PAGE_BAP_SW 0x000010 |
| 18 | #define _PAGE_BAP_UW 0x000020 |
| 19 | #define _PAGE_BAP_SX 0x000040 |
| 20 | #define _PAGE_BAP_UX 0x000080 |
| 21 | #define _PAGE_PSIZE_MSK 0x000f00 |
| 22 | #define _PAGE_PSIZE_4K 0x000200 |
| 23 | #define _PAGE_PSIZE_64K 0x000600 |
| 24 | #define _PAGE_PSIZE_1M 0x000a00 |
| 25 | #define _PAGE_PSIZE_16M 0x000e00 |
| 26 | #define _PAGE_DIRTY 0x001000 /* C: page changed */ |
| 27 | #define _PAGE_SW0 0x002000 |
| 28 | #define _PAGE_U3 0x004000 |
| 29 | #define _PAGE_U2 0x008000 |
| 30 | #define _PAGE_U1 0x010000 |
| 31 | #define _PAGE_U0 0x020000 |
| 32 | #define _PAGE_ACCESSED 0x040000 |
| 33 | #define _PAGE_LENDIAN 0x080000 |
| 34 | #define _PAGE_GUARDED 0x100000 |
| 35 | #define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */ |
| 36 | #define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */ |
| 37 | #define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */ |
| 38 | |
| 39 | /* "Higher level" linux bit combinations */ |
| Benjamin Herrenschmidt | ea3cc33 | 2009-08-18 19:00:34 +0000 | [diff] [blame^] | 40 | #define _PAGE_EXEC _PAGE_BAP_UX /* .. and was cache cleaned */ |
| 41 | #define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */ |
| 42 | #define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY) |
| 43 | #define _PAGE_KERNEL_RO (_PAGE_BAP_SR) |
| 44 | #define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX) |
| 45 | #define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX) |
| 46 | #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */ |
| Benjamin Herrenschmidt | 57e2a99 | 2009-07-28 11:59:34 +1000 | [diff] [blame] | 47 | |
| 48 | #define _PAGE_HASHPTE 0 |
| 49 | #define _PAGE_BUSY 0 |
| 50 | |
| 51 | #define _PAGE_SPECIAL _PAGE_SW0 |
| 52 | |
| 53 | /* Flags to be preserved on PTE modifications */ |
| 54 | #define _PAGE_HPTEFLAGS _PAGE_BUSY |
| 55 | |
| 56 | /* Base page size */ |
| 57 | #ifdef CONFIG_PPC_64K_PAGES |
| 58 | #define _PAGE_PSIZE _PAGE_PSIZE_64K |
| 59 | #define PTE_RPN_SHIFT (28) |
| 60 | #else |
| 61 | #define _PAGE_PSIZE _PAGE_PSIZE_4K |
| 62 | #define PTE_RPN_SHIFT (24) |
| 63 | #endif |
| 64 | |
| 65 | /* On 32-bit, we never clear the top part of the PTE */ |
| 66 | #ifdef CONFIG_PPC32 |
| 67 | #define _PTE_NONE_MASK 0xffffffff00000000ULL |
| 68 | #endif |
| 69 | |
| 70 | #endif /* __KERNEL__ */ |
| 71 | #endif /* _ASM_POWERPC_PTE_FSL_BOOKE_H */ |