blob: d8924cbd61e4ab8a2e77451b05947f75acd803b9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_PTE_E500_H
#define _ASM_POWERPC_NOHASH_PTE_E500_H
#ifdef __KERNEL__
/* PTE bit definitions for processors compliant to the Book3E
* architecture 2.06 or later. The position of the PTE bits
* matches the HW definition of the optional Embedded Page Table
* category.
*/
/* Architected bits */
#define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */
#define _PAGE_SW1 0x000002
#define _PAGE_BAP_SR 0x000004
#define _PAGE_BAP_UR 0x000008
#define _PAGE_BAP_SW 0x000010
#define _PAGE_BAP_UW 0x000020
#define _PAGE_BAP_SX 0x000040
#define _PAGE_BAP_UX 0x000080
#define _PAGE_PSIZE_MSK 0x000f00
#define _PAGE_PSIZE_4K 0x000200
#define _PAGE_PSIZE_8K 0x000300
#define _PAGE_PSIZE_16K 0x000400
#define _PAGE_PSIZE_32K 0x000500
#define _PAGE_PSIZE_64K 0x000600
#define _PAGE_PSIZE_128K 0x000700
#define _PAGE_PSIZE_256K 0x000800
#define _PAGE_PSIZE_512K 0x000900
#define _PAGE_PSIZE_1M 0x000a00
#define _PAGE_PSIZE_2M 0x000b00
#define _PAGE_PSIZE_4M 0x000c00
#define _PAGE_PSIZE_8M 0x000d00
#define _PAGE_PSIZE_16M 0x000e00
#define _PAGE_PSIZE_32M 0x000f00
#define _PAGE_DIRTY 0x001000 /* C: page changed */
#define _PAGE_SW0 0x002000
#define _PAGE_U3 0x004000
#define _PAGE_U2 0x008000
#define _PAGE_U1 0x010000
#define _PAGE_U0 0x020000
#define _PAGE_ACCESSED 0x040000
#define _PAGE_ENDIAN 0x080000
#define _PAGE_GUARDED 0x100000
#define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */
#define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */
#define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */
/* "Higher level" linux bit combinations */
#define _PAGE_EXEC (_PAGE_BAP_SX | _PAGE_BAP_UX) /* .. and was cache cleaned */
#define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */
#define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY)
#define _PAGE_KERNEL_RO (_PAGE_BAP_SR)
#define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX)
#define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX)
#define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */
#define _PAGE_PRIVILEGED (_PAGE_BAP_SR)
#define _PAGE_SPECIAL _PAGE_SW0
/* Base page size */
#define _PAGE_PSIZE _PAGE_PSIZE_4K
#define PTE_RPN_SHIFT (24)
#define PTE_WIMGE_SHIFT (19)
#define PTE_BAP_SHIFT (2)
/* On 32-bit, we never clear the top part of the PTE */
#ifdef CONFIG_PPC32
#define _PTE_NONE_MASK 0xffffffff00000000ULL
#define _PMD_PRESENT 0
#define _PMD_PRESENT_MASK (PAGE_MASK)
#define _PMD_BAD (~PAGE_MASK)
#define _PMD_USER 0
#else
#define _PTE_NONE_MASK 0
#endif
/*
* We define 2 sets of base prot bits, one for basic pages (ie,
* cacheable kernel and user pages) and one for non cacheable
* pages. We always set _PAGE_COHERENT when SMP is enabled or
* the processor might need it for DMA coherency.
*/
#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
#if defined(CONFIG_SMP)
#define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT)
#else
#define _PAGE_BASE (_PAGE_BASE_NC)
#endif
/* Permission masks used to generate the __P and __S table */
#define PAGE_NONE __pgprot(_PAGE_BASE)
#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW)
#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_BAP_UX)
#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER)
#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX)
#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER)
#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX)
#ifndef __ASSEMBLY__
static inline pte_t pte_mkprivileged(pte_t pte)
{
return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED);
}
#define pte_mkprivileged pte_mkprivileged
static inline pte_t pte_mkuser(pte_t pte)
{
return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER);
}
#define pte_mkuser pte_mkuser
static inline pte_t pte_mkexec(pte_t pte)
{
if (pte_val(pte) & _PAGE_BAP_UR)
return __pte((pte_val(pte) & ~_PAGE_BAP_SX) | _PAGE_BAP_UX);
else
return __pte((pte_val(pte) & ~_PAGE_BAP_UX) | _PAGE_BAP_SX);
}
#define pte_mkexec pte_mkexec
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_NOHASH_PTE_E500_H */
|
