Rev 901 | Rev 904 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 901 | Rev 902 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
3 | * Copyright (C) 2006 Jakub Vana |
3 | * Copyright (C) 2006 Jakub Vana |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | #include <arch/mm/page.h> |
30 | #include <arch/mm/page.h> |
31 | #include <genarch/mm/page_ht.h> |
31 | #include <genarch/mm/page_ht.h> |
32 | #include <mm/asid.h> |
32 | #include <mm/asid.h> |
33 | #include <arch/mm/asid.h> |
33 | #include <arch/mm/asid.h> |
34 | #include <arch/types.h> |
34 | #include <arch/types.h> |
35 | #include <typedefs.h> |
35 | #include <typedefs.h> |
36 | #include <print.h> |
36 | #include <print.h> |
37 | #include <mm/page.h> |
37 | #include <mm/page.h> |
38 | #include <mm/frame.h> |
38 | #include <mm/frame.h> |
39 | #include <config.h> |
39 | #include <config.h> |
40 | #include <panic.h> |
40 | #include <panic.h> |
41 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
42 | #include <arch/barrier.h> |
42 | #include <arch/barrier.h> |
43 | #include <memstr.h> |
43 | #include <memstr.h> |
44 | 44 | ||
45 | static void set_environment(void); |
45 | static void set_environment(void); |
46 | 46 | ||
47 | /** Initialize ia64 virtual address translation subsystem. */ |
47 | /** Initialize ia64 virtual address translation subsystem. */ |
48 | void page_arch_init(void) |
48 | void page_arch_init(void) |
49 | { |
49 | { |
50 | page_mapping_operations = &ht_mapping_operations; |
50 | page_mapping_operations = &ht_mapping_operations; |
51 | pk_disable(); |
51 | pk_disable(); |
52 | set_environment(); |
52 | set_environment(); |
53 | } |
53 | } |
54 | 54 | ||
55 | /** Initialize VHPT and region registers. */ |
55 | /** Initialize VHPT and region registers. */ |
56 | void set_environment(void) |
56 | void set_environment(void) |
57 | { |
57 | { |
58 | region_register rr; |
58 | region_register rr; |
59 | pta_register pta; |
59 | pta_register pta; |
60 | int i; |
60 | int i; |
61 | 61 | ||
62 | /* |
62 | /* |
63 | * First set up kernel region register. |
63 | * First set up kernel region register. |
64 | * This is redundant (see start.S) but we keep it here just for sure. |
64 | * This is redundant (see start.S) but we keep it here just for sure. |
65 | */ |
65 | */ |
66 | rr.word = rr_read(VRN_KERNEL); |
66 | rr.word = rr_read(VRN_KERNEL); |
67 | rr.map.ve = 0; /* disable VHPT walker */ |
67 | rr.map.ve = 0; /* disable VHPT walker */ |
68 | rr.map.ps = PAGE_WIDTH; |
68 | rr.map.ps = PAGE_WIDTH; |
69 | rr.map.rid = ASID2RID(ASID_KERNEL, VRN_KERNEL); |
69 | rr.map.rid = ASID2RID(ASID_KERNEL, VRN_KERNEL); |
70 | rr_write(VRN_KERNEL, rr.word); |
70 | rr_write(VRN_KERNEL, rr.word); |
71 | srlz_i(); |
71 | srlz_i(); |
72 | srlz_d(); |
72 | srlz_d(); |
73 | 73 | ||
74 | /* |
74 | /* |
75 | * And invalidate the rest of region register. |
75 | * And setup the rest of region register. |
76 | */ |
76 | */ |
77 | for(i = 0; i < REGION_REGISTERS; i++) { |
77 | for(i = 0; i < REGION_REGISTERS; i++) { |
78 | /* skip kernel rr */ |
78 | /* skip kernel rr */ |
79 | if (i == VRN_KERNEL) |
79 | if (i == VRN_KERNEL) |
80 | continue; |
80 | continue; |
81 | 81 | ||
82 | rr.word == rr_read(i); |
82 | rr.word == rr_read(i); |
83 | rr.map.ve = 0; /* disable VHPT walker */ |
83 | rr.map.ve = 0; /* disable VHPT walker */ |
84 | rr.map.rid = RID_INVALID; |
84 | rr.map.rid = RID_KERNEL; |
- | 85 | rr.map.ps = PAGE_WIDTH; |
|
85 | rr_write(i, rr.word); |
86 | rr_write(i, rr.word); |
86 | srlz_i(); |
87 | srlz_i(); |
87 | srlz_d(); |
88 | srlz_d(); |
88 | } |
89 | } |
89 | 90 | ||
90 | /* |
91 | /* |
91 | * Set up PTA register. |
92 | * Set up PTA register. |
92 | */ |
93 | */ |
93 | pta.word = pta_read(); |
94 | pta.word = pta_read(); |
94 | pta.map.ve = 0; /* disable VHPT walker */ |
95 | pta.map.ve = 0; /* disable VHPT walker */ |
95 | pta.map.vf = 1; /* large entry format */ |
96 | pta.map.vf = 1; /* large entry format */ |
96 | pta.map.size = VHPT_WIDTH; |
97 | pta.map.size = VHPT_WIDTH; |
97 | pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT; |
98 | pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT; |
98 | pta_write(pta.word); |
99 | pta_write(pta.word); |
99 | srlz_i(); |
100 | srlz_i(); |
100 | srlz_d(); |
101 | srlz_d(); |
101 | } |
102 | } |
102 | 103 | ||
103 | /** Calculate address of collision chain from VPN and ASID. |
104 | /** Calculate address of collision chain from VPN and ASID. |
104 | * |
105 | * |
105 | * Interrupts must be disabled. |
106 | * Interrupts must be disabled. |
106 | * |
107 | * |
107 | * @param page Address of virtual page including VRN bits. |
108 | * @param page Address of virtual page including VRN bits. |
108 | * @param asid Address space identifier. |
109 | * @param asid Address space identifier. |
109 | * |
110 | * |
110 | * @return VHPT entry address. |
111 | * @return VHPT entry address. |
111 | */ |
112 | */ |
112 | vhpt_entry_t *vhpt_hash(__address page, asid_t asid) |
113 | vhpt_entry_t *vhpt_hash(__address page, asid_t asid) |
113 | { |
114 | { |
114 | region_register rr_save, rr; |
115 | region_register rr_save, rr; |
115 | index_t vrn; |
116 | index_t vrn; |
116 | rid_t rid; |
117 | rid_t rid; |
117 | vhpt_entry_t *v; |
118 | vhpt_entry_t *v; |
118 | 119 | ||
119 | vrn = page >> VRN_SHIFT; |
120 | vrn = page >> VRN_SHIFT; |
120 | rid = ASID2RID(asid, vrn); |
121 | rid = ASID2RID(asid, vrn); |
121 | 122 | ||
122 | rr_save.word = rr_read(vrn); |
123 | rr_save.word = rr_read(vrn); |
123 | if (rr_save.map.rid == rid) { |
124 | if (rr_save.map.rid == rid) { |
124 | /* |
125 | /* |
125 | * The RID is already in place, compute thash and return. |
126 | * The RID is already in place, compute thash and return. |
126 | */ |
127 | */ |
127 | v = (vhpt_entry_t *) thash(page); |
128 | v = (vhpt_entry_t *) thash(page); |
128 | return v; |
129 | return v; |
129 | } |
130 | } |
130 | 131 | ||
131 | /* |
132 | /* |
132 | * The RID must be written to some region register. |
133 | * The RID must be written to some region register. |
133 | * To speed things up, register indexed by vrn is used. |
134 | * To speed things up, register indexed by vrn is used. |
134 | */ |
135 | */ |
135 | rr.word = rr_save.word; |
136 | rr.word = rr_save.word; |
136 | rr.map.rid = rid; |
137 | rr.map.rid = rid; |
137 | rr_write(vrn, rr.word); |
138 | rr_write(vrn, rr.word); |
138 | srlz_i(); |
139 | srlz_i(); |
139 | v = (vhpt_entry_t *) thash(page); |
140 | v = (vhpt_entry_t *) thash(page); |
140 | rr_write(vrn, rr_save.word); |
141 | rr_write(vrn, rr_save.word); |
141 | srlz_i(); |
142 | srlz_i(); |
142 | srlz_d(); |
143 | srlz_d(); |
143 | 144 | ||
144 | return v; |
145 | return v; |
145 | } |
146 | } |
146 | 147 | ||
147 | /** Compare ASID and VPN against PTE. |
148 | /** Compare ASID and VPN against PTE. |
148 | * |
149 | * |
149 | * Interrupts must be disabled. |
150 | * Interrupts must be disabled. |
150 | * |
151 | * |
151 | * @param page Address of virtual page including VRN bits. |
152 | * @param page Address of virtual page including VRN bits. |
152 | * @param asid Address space identifier. |
153 | * @param asid Address space identifier. |
153 | * |
154 | * |
154 | * @return True if page and asid match the page and asid of t, false otherwise. |
155 | * @return True if page and asid match the page and asid of t, false otherwise. |
155 | */ |
156 | */ |
156 | bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v) |
157 | bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v) |
157 | { |
158 | { |
158 | region_register rr_save, rr; |
159 | region_register rr_save, rr; |
159 | index_t vrn; |
160 | index_t vrn; |
160 | rid_t rid; |
161 | rid_t rid; |
161 | bool match; |
162 | bool match; |
162 | 163 | ||
163 | ASSERT(v); |
164 | ASSERT(v); |
164 | 165 | ||
165 | vrn = page >> VRN_SHIFT; |
166 | vrn = page >> VRN_SHIFT; |
166 | rid = ASID2RID(asid, vrn); |
167 | rid = ASID2RID(asid, vrn); |
167 | 168 | ||
168 | rr_save.word = rr_read(vrn); |
169 | rr_save.word = rr_read(vrn); |
169 | if (rr_save.map.rid == rid) { |
170 | if (rr_save.map.rid == rid) { |
170 | /* |
171 | /* |
171 | * The RID is already in place, compare ttag with t and return. |
172 | * The RID is already in place, compare ttag with t and return. |
172 | */ |
173 | */ |
173 | return ttag(page) == v->present.tag.tag_word; |
174 | return ttag(page) == v->present.tag.tag_word; |
174 | } |
175 | } |
175 | 176 | ||
176 | /* |
177 | /* |
177 | * The RID must be written to some region register. |
178 | * The RID must be written to some region register. |
178 | * To speed things up, register indexed by vrn is used. |
179 | * To speed things up, register indexed by vrn is used. |
179 | */ |
180 | */ |
180 | rr.word = rr_save.word; |
181 | rr.word = rr_save.word; |
181 | rr.map.rid = rid; |
182 | rr.map.rid = rid; |
182 | rr_write(vrn, rr.word); |
183 | rr_write(vrn, rr.word); |
183 | srlz_i(); |
184 | srlz_i(); |
184 | match = (ttag(page) == v->present.tag.tag_word); |
185 | match = (ttag(page) == v->present.tag.tag_word); |
185 | rr_write(vrn, rr_save.word); |
186 | rr_write(vrn, rr_save.word); |
186 | srlz_i(); |
187 | srlz_i(); |
187 | srlz_d(); |
188 | srlz_d(); |
188 | 189 | ||
189 | return match; |
190 | return match; |
190 | } |
191 | } |
191 | 192 | ||
192 | /** Set up one VHPT entry. |
193 | /** Set up one VHPT entry. |
193 | * |
194 | * |
194 | * @param t VHPT entry to be set up. |
195 | * @param t VHPT entry to be set up. |
195 | * @param page Virtual address of the page mapped by the entry. |
196 | * @param page Virtual address of the page mapped by the entry. |
196 | * @param asid Address space identifier of the address space to which page belongs. |
197 | * @param asid Address space identifier of the address space to which page belongs. |
197 | * @param frame Physical address of the frame to wich page is mapped. |
198 | * @param frame Physical address of the frame to wich page is mapped. |
198 | * @param flags Different flags for the mapping. |
199 | * @param flags Different flags for the mapping. |
199 | */ |
200 | */ |
200 | void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags) |
201 | void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags) |
201 | { |
202 | { |
202 | region_register rr_save, rr; |
203 | region_register rr_save, rr; |
203 | index_t vrn; |
204 | index_t vrn; |
204 | rid_t rid; |
205 | rid_t rid; |
205 | __u64 tag; |
206 | __u64 tag; |
206 | 207 | ||
207 | ASSERT(v); |
208 | ASSERT(v); |
208 | 209 | ||
209 | vrn = page >> VRN_SHIFT; |
210 | vrn = page >> VRN_SHIFT; |
210 | rid = ASID2RID(asid, vrn); |
211 | rid = ASID2RID(asid, vrn); |
211 | 212 | ||
212 | /* |
213 | /* |
213 | * Compute ttag. |
214 | * Compute ttag. |
214 | */ |
215 | */ |
215 | rr_save.word = rr_read(vrn); |
216 | rr_save.word = rr_read(vrn); |
216 | rr.word = rr_save.word; |
217 | rr.word = rr_save.word; |
217 | rr.map.rid = rid; |
218 | rr.map.rid = rid; |
218 | rr_write(vrn, rr.word); |
219 | rr_write(vrn, rr.word); |
219 | srlz_i(); |
220 | srlz_i(); |
220 | tag = ttag(page); |
221 | tag = ttag(page); |
221 | rr_write(vrn, rr_save.word); |
222 | rr_write(vrn, rr_save.word); |
222 | srlz_i(); |
223 | srlz_i(); |
223 | srlz_d(); |
224 | srlz_d(); |
224 | 225 | ||
225 | /* |
226 | /* |
226 | * Clear the entry. |
227 | * Clear the entry. |
227 | */ |
228 | */ |
228 | v->word[0] = 0; |
229 | v->word[0] = 0; |
229 | v->word[1] = 0; |
230 | v->word[1] = 0; |
230 | v->word[2] = 0; |
231 | v->word[2] = 0; |
231 | v->word[3] = 0; |
232 | v->word[3] = 0; |
232 | 233 | ||
233 | v->present.p = true; |
234 | v->present.p = true; |
234 | v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE; |
235 | v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE; |
235 | v->present.a = false; /* not accessed */ |
236 | v->present.a = false; /* not accessed */ |
236 | v->present.d = false; /* not dirty */ |
237 | v->present.d = false; /* not dirty */ |
237 | v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL; |
238 | v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL; |
238 | v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ; |
239 | v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ; |
239 | v->present.ar |= (flags & PAGE_EXEC) ? AR_EXECUTE : 0; |
240 | v->present.ar |= (flags & PAGE_EXEC) ? AR_EXECUTE : 0; |
240 | v->present.ppn = frame >> PPN_SHIFT; |
241 | v->present.ppn = frame >> PPN_SHIFT; |
241 | v->present.ed = false; /* exception not deffered */ |
242 | v->present.ed = false; /* exception not deffered */ |
242 | v->present.ps = PAGE_WIDTH; |
243 | v->present.ps = PAGE_WIDTH; |
243 | v->present.key = 0; |
244 | v->present.key = 0; |
244 | v->present.tag.tag_word = tag; |
245 | v->present.tag.tag_word = tag; |
245 | } |
246 | } |
246 | 247 |