1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_NOHASH_PTE_BOOK3E_H
3 #define _ASM_POWERPC_NOHASH_PTE_BOOK3E_H
6 /* PTE bit definitions for processors compliant to the Book3E
7 * architecture 2.06 or later. The position of the PTE bits
8 * matches the HW definition of the optional Embedded Page Table
12 /* Architected bits */
13 #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */
14 #define _PAGE_SW1 0x000002
15 #define _PAGE_BIT_SWAP_TYPE 2
16 #define _PAGE_BAP_SR 0x000004
17 #define _PAGE_BAP_UR 0x000008
18 #define _PAGE_BAP_SW 0x000010
19 #define _PAGE_BAP_UW 0x000020
20 #define _PAGE_BAP_SX 0x000040
21 #define _PAGE_BAP_UX 0x000080
22 #define _PAGE_PSIZE_MSK 0x000f00
23 #define _PAGE_PSIZE_4K 0x000200
24 #define _PAGE_PSIZE_8K 0x000300
25 #define _PAGE_PSIZE_16K 0x000400
26 #define _PAGE_PSIZE_32K 0x000500
27 #define _PAGE_PSIZE_64K 0x000600
28 #define _PAGE_PSIZE_128K 0x000700
29 #define _PAGE_PSIZE_256K 0x000800
30 #define _PAGE_PSIZE_512K 0x000900
31 #define _PAGE_PSIZE_1M 0x000a00
32 #define _PAGE_PSIZE_2M 0x000b00
33 #define _PAGE_PSIZE_4M 0x000c00
34 #define _PAGE_PSIZE_8M 0x000d00
35 #define _PAGE_PSIZE_16M 0x000e00
36 #define _PAGE_PSIZE_32M 0x000f00
37 #define _PAGE_DIRTY 0x001000 /* C: page changed */
38 #define _PAGE_SW0 0x002000
39 #define _PAGE_U3 0x004000
40 #define _PAGE_U2 0x008000
41 #define _PAGE_U1 0x010000
42 #define _PAGE_U0 0x020000
43 #define _PAGE_ACCESSED 0x040000
44 #define _PAGE_ENDIAN 0x080000
45 #define _PAGE_GUARDED 0x100000
46 #define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */
47 #define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */
48 #define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */
50 /* "Higher level" linux bit combinations */
51 #define _PAGE_EXEC _PAGE_BAP_UX /* .. and was cache cleaned */
52 #define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */
53 #define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY)
54 #define _PAGE_KERNEL_RO (_PAGE_BAP_SR)
55 #define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX)
56 #define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX)
57 #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */
58 #define _PAGE_PRIVILEGED (_PAGE_BAP_SR)
60 #define _PAGE_SPECIAL _PAGE_SW0
63 #ifdef CONFIG_PPC_64K_PAGES
64 #define _PAGE_PSIZE _PAGE_PSIZE_64K
65 #define PTE_RPN_SHIFT (28)
67 #define _PAGE_PSIZE _PAGE_PSIZE_4K
68 #define PTE_RPN_SHIFT (24)
71 #define PTE_WIMGE_SHIFT (19)
72 #define PTE_BAP_SHIFT (2)
74 /* On 32-bit, we never clear the top part of the PTE */
76 #define _PTE_NONE_MASK 0xffffffff00000000ULL
77 #define _PMD_PRESENT 0
78 #define _PMD_PRESENT_MASK (PAGE_MASK)
79 #define _PMD_BAD (~PAGE_MASK)
82 #define _PTE_NONE_MASK 0
86 * We define 2 sets of base prot bits, one for basic pages (ie,
87 * cacheable kernel and user pages) and one for non cacheable
88 * pages. We always set _PAGE_COHERENT when SMP is enabled or
89 * the processor might need it for DMA coherency.
91 #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
92 #if defined(CONFIG_SMP)
93 #define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT)
95 #define _PAGE_BASE (_PAGE_BASE_NC)
98 /* Permission masks used to generate the __P and __S table */
99 #define PAGE_NONE __pgprot(_PAGE_BASE)
100 #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW)
101 #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC)
102 #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER)
103 #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
104 #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER)
105 #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
108 static inline pte_t pte_mkprivileged(pte_t pte)
110 return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED);
113 #define pte_mkprivileged pte_mkprivileged
115 static inline pte_t pte_mkuser(pte_t pte)
117 return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER);
120 #define pte_mkuser pte_mkuser
121 #endif /* __ASSEMBLY__ */
123 #endif /* __KERNEL__ */
124 #endif /* _ASM_POWERPC_NOHASH_PTE_BOOK3E_H */