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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
2 | * Copyright (C) 2005 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __ppc32_PAGE_H__ |
29 | #ifndef __ppc32_PAGE_H__ |
30 | #define __ppc32_PAGE_H__ |
30 | #define __ppc32_PAGE_H__ |
31 | 31 | ||
32 | #include <arch/mm/frame.h> |
32 | #include <arch/mm/frame.h> |
33 | 33 | ||
34 | #define PAGE_WIDTH FRAME_WIDTH |
34 | #define PAGE_WIDTH FRAME_WIDTH |
35 | #define PAGE_SIZE FRAME_SIZE |
35 | #define PAGE_SIZE FRAME_SIZE |
36 | 36 | ||
37 | #ifdef KERNEL |
37 | #ifdef KERNEL |
38 | 38 | ||
39 | #ifndef __ASM__ |
39 | #ifndef __ASM__ |
40 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
40 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
41 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
41 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
42 | #else |
42 | #else |
43 | # define KA2PA(x) ((x) - 0x80000000) |
43 | # define KA2PA(x) ((x) - 0x80000000) |
44 | # define PA2KA(x) ((x) + 0x80000000) |
44 | # define PA2KA(x) ((x) + 0x80000000) |
45 | #endif |
45 | #endif |
46 | 46 | ||
47 | /* |
47 | /* |
48 | * Implementation of generic 4-level page table interface, |
48 | * Implementation of generic 4-level page table interface, |
49 | * the hardware Page Hash Table is used as cache. |
49 | * the hardware Page Hash Table is used as cache. |
50 | * |
50 | * |
51 | * Page table layout: |
51 | * Page table layout: |
52 | * - 32-bit virtual addressess |
52 | * - 32-bit virtual addressess |
53 | * - Offset is 12 bits => pages are 4K long |
53 | * - Offset is 12 bits => pages are 4K long |
54 | * - PTL0 has 1024 entries (10 bits) |
54 | * - PTL0 has 1024 entries (10 bits) |
55 | * - PTL1 is not used |
55 | * - PTL1 is not used |
56 | * - PTL2 is not used |
56 | * - PTL2 is not used |
57 | * - PLT3 has 1024 entries (10 bits) |
57 | * - PLT3 has 1024 entries (10 bits) |
58 | */ |
58 | */ |
59 | 59 | ||
60 | #define PTL0_ENTRIES_ARCH 1024 |
60 | #define PTL0_ENTRIES_ARCH 1024 |
61 | #define PTL1_ENTRIES_ARCH 0 |
61 | #define PTL1_ENTRIES_ARCH 0 |
62 | #define PTL2_ENTRIES_ARCH 0 |
62 | #define PTL2_ENTRIES_ARCH 0 |
63 | #define PTL3_ENTRIES_ARCH 1024 |
63 | #define PTL3_ENTRIES_ARCH 1024 |
64 | 64 | ||
65 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
65 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
66 | #define PTL1_INDEX_ARCH(vaddr) 0 |
66 | #define PTL1_INDEX_ARCH(vaddr) 0 |
67 | #define PTL2_INDEX_ARCH(vaddr) 0 |
67 | #define PTL2_INDEX_ARCH(vaddr) 0 |
68 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
68 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
69 | 69 | ||
70 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *) (ptl0))[(i)].pfn << 12) |
70 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *) (ptl0))[(i)].pfn << 12) |
71 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
71 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
72 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
72 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
73 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *) (ptl3))[(i)].pfn << 12) |
73 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *) (ptl3))[(i)].pfn << 12) |
74 | 74 | ||
75 | #define SET_PTL0_ADDRESS_ARCH(ptl0) |
75 | #define SET_PTL0_ADDRESS_ARCH(ptl0) |
76 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12) |
76 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12) |
77 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
77 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
78 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
78 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
79 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *) (ptl3))[(i)].pfn = (a) >> 12) |
79 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *) (ptl3))[(i)].pfn = (a) >> 12) |
80 | 80 | ||
81 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *) (ptl0), (index_t) (i)) |
81 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *) (ptl0), (index_t) (i)) |
82 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
82 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
83 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
83 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
84 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *) (ptl3), (index_t) (i)) |
84 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *) (ptl3), (index_t) (i)) |
85 | 85 | ||
86 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x)) |
86 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x)) |
87 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
87 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
88 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
88 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
89 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x)) |
89 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x)) |
90 | 90 | ||
91 | #define PTE_VALID_ARCH(pte) (*((__u32 *) (pte)) != 0) |
91 | #define PTE_VALID_ARCH(pte) (*((__u32 *) (pte)) != 0) |
92 | #define PTE_PRESENT_ARCH(pte) ((pte)->p != 0) |
92 | #define PTE_PRESENT_ARCH(pte) ((pte)->p != 0) |
93 | #define PTE_GET_FRAME_ARCH(pte) ((pte)->pfn << 12) |
93 | #define PTE_GET_FRAME_ARCH(pte) ((pte)->pfn << 12) |
94 | #define PTE_WRITABLE_ARCH(pte) 1 |
94 | #define PTE_WRITABLE_ARCH(pte) 1 |
95 | #define PTE_EXECUTABLE_ARCH(pte) 1 |
95 | #define PTE_EXECUTABLE_ARCH(pte) 1 |
96 | 96 | ||
97 | #ifndef __ASM__ |
97 | #ifndef __ASM__ |
98 | 98 | ||
99 | #include <mm/page.h> |
99 | #include <mm/page.h> |
100 | #include <arch/mm/frame.h> |
100 | #include <arch/mm/frame.h> |
101 | #include <arch/types.h> |
101 | #include <arch/types.h> |
102 | 102 | ||
103 | static inline int get_pt_flags(pte_t *pt, index_t i) |
103 | static inline int get_pt_flags(pte_t *pt, index_t i) |
104 | { |
104 | { |
105 | pte_t *p = &pt[i]; |
105 | pte_t *p = &pt[i]; |
106 | 106 | ||
107 | return ( |
107 | return ( |
108 | (1 << PAGE_CACHEABLE_SHIFT) | |
108 | (1 << PAGE_CACHEABLE_SHIFT) | |
109 | ((!p->p) << PAGE_PRESENT_SHIFT) | |
109 | ((!p->p) << PAGE_PRESENT_SHIFT) | |
110 | (1 << PAGE_USER_SHIFT) | |
110 | (1 << PAGE_USER_SHIFT) | |
111 | (1 << PAGE_READ_SHIFT) | |
111 | (1 << PAGE_READ_SHIFT) | |
112 | (1 << PAGE_WRITE_SHIFT) | |
112 | (1 << PAGE_WRITE_SHIFT) | |
113 | (1 << PAGE_EXEC_SHIFT) | |
113 | (1 << PAGE_EXEC_SHIFT) | |
114 | (p->g << PAGE_GLOBAL_SHIFT) |
114 | (p->g << PAGE_GLOBAL_SHIFT) |
115 | ); |
115 | ); |
116 | } |
116 | } |
117 | 117 | ||
118 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
118 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
119 | { |
119 | { |
120 | pte_t *p = &pt[i]; |
120 | pte_t *p = &pt[i]; |
121 | 121 | ||
122 | p->p = !(flags & PAGE_NOT_PRESENT); |
122 | p->p = !(flags & PAGE_NOT_PRESENT); |
123 | p->g = (flags & PAGE_GLOBAL) != 0; |
123 | p->g = (flags & PAGE_GLOBAL) != 0; |
124 | p->valid = 1; |
124 | p->valid = 1; |
125 | } |
125 | } |
126 | 126 | ||
127 | extern void page_arch_init(void); |
127 | extern void page_arch_init(void); |
128 | 128 | ||
129 | #define PHT_BITS 16 |
129 | #define PHT_BITS 16 |
130 | #define PHT_ORDER 4 |
130 | #define PHT_ORDER 4 |
131 | 131 | ||
132 | typedef struct { |
132 | typedef struct { |
133 | unsigned v : 1; /**< Valid */ |
133 | unsigned v : 1; /**< Valid */ |
134 | unsigned vsid : 24; /**< Virtual Segment ID */ |
134 | unsigned vsid : 24; /**< Virtual Segment ID */ |
135 | unsigned h : 1; /**< Primary/secondary hash */ |
135 | unsigned h : 1; /**< Primary/secondary hash */ |
136 | unsigned api : 6; /**< Abbreviated Page Index */ |
136 | unsigned api : 6; /**< Abbreviated Page Index */ |
137 | unsigned rpn : 20; /**< Real Page Number */ |
137 | unsigned rpn : 20; /**< Real Page Number */ |
138 | unsigned reserved0 : 3; |
138 | unsigned reserved0 : 3; |
139 | unsigned r : 1; /**< Reference */ |
139 | unsigned r : 1; /**< Reference */ |
140 | unsigned c : 1; /**< Change */ |
140 | unsigned c : 1; /**< Change */ |
141 | unsigned wimg : 4; /**< Access control */ |
141 | unsigned wimg : 4; /**< Access control */ |
142 | unsigned reserved1 : 1; |
142 | unsigned reserved1 : 1; |
143 | unsigned pp : 2; /**< Page protection */ |
143 | unsigned pp : 2; /**< Page protection */ |
144 | } phte_t; |
144 | } phte_t; |
145 | 145 | ||
146 | extern void pht_refill(bool data, istate_t *istate); |
146 | extern void pht_refill(int n, istate_t *istate); |
147 | extern void pht_init(void); |
147 | extern void pht_init(void); |
148 | 148 | ||
149 | #endif /* __ASM__ */ |
149 | #endif /* __ASM__ */ |
150 | 150 | ||
151 | #endif /* KERNEL */ |
151 | #endif /* KERNEL */ |
152 | 152 | ||
153 | #endif |
153 | #endif |
154 | 154 |