Rev 1277 | Rev 1355 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
162 | decky | 1 | # |
2 | # Copyright (C) 2005 Martin Decky |
||
3 | # All rights reserved. |
||
4 | # |
||
5 | # Redistribution and use in source and binary forms, with or without |
||
6 | # modification, are permitted provided that the following conditions |
||
7 | # are met: |
||
8 | # |
||
9 | # - Redistributions of source code must retain the above copyright |
||
10 | # notice, this list of conditions and the following disclaimer. |
||
11 | # - Redistributions in binary form must reproduce the above copyright |
||
12 | # notice, this list of conditions and the following disclaimer in the |
||
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 |
||
15 | # derived from this software without specific prior written permission. |
||
16 | # |
||
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 |
||
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | # |
||
28 | |||
845 | decky | 29 | #include <arch/asm/regname.h> |
191 | decky | 30 | |
162 | decky | 31 | .text |
32 | |||
1220 | decky | 33 | .global userspace_asm |
1004 | decky | 34 | .global iret |
1277 | decky | 35 | .global iret_syscall |
210 | decky | 36 | .global memsetb |
37 | .global memcpy |
||
1288 | jermar | 38 | .global memcpy_from_uspace |
39 | .global memcpy_to_uspace |
||
40 | .global memcpy_from_uspace_failover_address |
||
41 | .global memcpy_to_uspace_failover_address |
||
185 | decky | 42 | |
1220 | decky | 43 | userspace_asm: |
44 | |||
45 | # r3 = uspace_uarg |
||
46 | # r4 = stack |
||
1267 | decky | 47 | # r5 = entry |
48 | |||
49 | # disable interrupts |
||
1220 | decky | 50 | |
51 | mfmsr r31 |
||
52 | rlwinm r31, r31, 0, 17, 15 |
||
53 | mtmsr r31 |
||
54 | |||
55 | # set entry point |
||
56 | |||
57 | mtsrr0 r5 |
||
58 | |||
59 | # set problem state, enable interrupts |
||
60 | |||
1267 | decky | 61 | ori r31, r31, msr_pr |
62 | ori r31, r31, msr_ee |
||
1220 | decky | 63 | mtsrr1 r31 |
64 | |||
65 | # set stack |
||
66 | |||
67 | mr sp, r4 |
||
68 | |||
69 | # jump to userspace |
||
70 | |||
71 | rfi |
||
72 | |||
1004 | decky | 73 | iret: |
1277 | decky | 74 | |
75 | # disable interrupts |
||
76 | |||
77 | mfmsr r31 |
||
78 | rlwinm r31, r31, 0, 17, 15 |
||
79 | mtmsr r31 |
||
80 | |||
1004 | decky | 81 | lwz r0, 0(sp) |
82 | lwz r2, 4(sp) |
||
83 | lwz r3, 8(sp) |
||
84 | lwz r4, 12(sp) |
||
85 | lwz r5, 16(sp) |
||
86 | lwz r6, 20(sp) |
||
87 | lwz r7, 24(sp) |
||
88 | lwz r8, 28(sp) |
||
89 | lwz r9, 32(sp) |
||
90 | lwz r10, 36(sp) |
||
91 | lwz r11, 40(sp) |
||
1267 | decky | 92 | lwz r13, 44(sp) |
93 | lwz r14, 48(sp) |
||
94 | lwz r15, 52(sp) |
||
95 | lwz r16, 56(sp) |
||
96 | lwz r17, 60(sp) |
||
97 | lwz r18, 64(sp) |
||
98 | lwz r19, 68(sp) |
||
99 | lwz r20, 72(sp) |
||
100 | lwz r21, 76(sp) |
||
101 | lwz r22, 80(sp) |
||
102 | lwz r23, 84(sp) |
||
103 | lwz r24, 88(sp) |
||
104 | lwz r25, 92(sp) |
||
105 | lwz r26, 96(sp) |
||
106 | lwz r27, 100(sp) |
||
107 | lwz r28, 104(sp) |
||
108 | lwz r29, 108(sp) |
||
109 | lwz r30, 112(sp) |
||
110 | lwz r31, 116(sp) |
||
1004 | decky | 111 | |
1267 | decky | 112 | lwz r12, 120(sp) |
1277 | decky | 113 | mtcr r12 |
114 | |||
115 | lwz r12, 124(sp) |
||
1267 | decky | 116 | mtsrr0 r12 |
1004 | decky | 117 | |
1277 | decky | 118 | lwz r12, 128(sp) |
1267 | decky | 119 | mtsrr1 r12 |
120 | |||
1277 | decky | 121 | lwz r12, 132(sp) |
1267 | decky | 122 | mtlr r12 |
123 | |||
1277 | decky | 124 | lwz r12, 136(sp) |
125 | mtctr r12 |
||
126 | |||
127 | lwz r12, 140(sp) |
||
128 | mtxer r12 |
||
129 | |||
130 | lwz r12, 144(sp) |
||
131 | lwz sp, 148(sp) |
||
132 | |||
133 | rfi |
||
134 | |||
135 | iret_syscall: |
||
136 | |||
137 | # disable interrupts |
||
138 | |||
139 | mfmsr r31 |
||
140 | rlwinm r31, r31, 0, 17, 15 |
||
141 | mtmsr r31 |
||
142 | |||
143 | lwz r0, 0(sp) |
||
144 | lwz r2, 4(sp) |
||
145 | lwz r4, 12(sp) |
||
146 | lwz r5, 16(sp) |
||
147 | lwz r6, 20(sp) |
||
148 | lwz r7, 24(sp) |
||
149 | lwz r8, 28(sp) |
||
150 | lwz r9, 32(sp) |
||
151 | lwz r10, 36(sp) |
||
152 | lwz r11, 40(sp) |
||
153 | lwz r13, 44(sp) |
||
154 | lwz r14, 48(sp) |
||
155 | lwz r15, 52(sp) |
||
156 | lwz r16, 56(sp) |
||
157 | lwz r17, 60(sp) |
||
158 | lwz r18, 64(sp) |
||
159 | lwz r19, 68(sp) |
||
160 | lwz r20, 72(sp) |
||
161 | lwz r21, 76(sp) |
||
162 | lwz r22, 80(sp) |
||
163 | lwz r23, 84(sp) |
||
164 | lwz r24, 88(sp) |
||
165 | lwz r25, 92(sp) |
||
166 | lwz r26, 96(sp) |
||
167 | lwz r27, 100(sp) |
||
168 | lwz r28, 104(sp) |
||
169 | lwz r29, 108(sp) |
||
170 | lwz r30, 112(sp) |
||
171 | lwz r31, 116(sp) |
||
172 | |||
173 | lwz r12, 120(sp) |
||
1267 | decky | 174 | mtcr r12 |
175 | |||
1277 | decky | 176 | lwz r12, 124(sp) |
177 | mtsrr0 r12 |
||
178 | |||
179 | lwz r12, 128(sp) |
||
180 | mtsrr1 r12 |
||
181 | |||
182 | lwz r12, 132(sp) |
||
183 | mtlr r12 |
||
184 | |||
1267 | decky | 185 | lwz r12, 136(sp) |
186 | mtctr r12 |
||
187 | |||
188 | lwz r12, 140(sp) |
||
189 | mtxer r12 |
||
1277 | decky | 190 | |
191 | lwz r12, 144(sp) |
||
192 | lwz sp, 148(sp) |
||
1267 | decky | 193 | |
1004 | decky | 194 | rfi |
195 | |||
210 | decky | 196 | memsetb: |
197 | rlwimi r5, r5, 8, 16, 23 |
||
198 | rlwimi r5, r5, 16, 0, 15 |
||
199 | |||
200 | addi r14, r3, -4 |
||
201 | |||
202 | cmplwi 0, r4, 4 |
||
203 | blt 7f |
||
204 | |||
205 | stwu r5, 4(r14) |
||
206 | beqlr |
||
207 | |||
208 | andi. r15, r14, 3 |
||
209 | add r4, r15, r4 |
||
210 | subf r14, r15, r14 |
||
211 | srwi r15, r4, 2 |
||
212 | mtctr r15 |
||
213 | |||
214 | bdz 6f |
||
215 | |||
216 | 1: |
||
217 | stwu r5, 4(r14) |
||
218 | bdnz 1b |
||
219 | |||
220 | 6: |
||
221 | |||
222 | andi. r4, r4, 3 |
||
223 | |||
224 | 7: |
||
225 | |||
226 | cmpwi 0, r4, 0 |
||
227 | beqlr |
||
228 | |||
229 | mtctr r4 |
||
230 | addi r6, r6, 3 |
||
231 | |||
232 | 8: |
||
233 | |||
234 | stbu r5, 1(r14) |
||
235 | bdnz 8b |
||
236 | |||
237 | blr |
||
238 | |||
239 | memcpy: |
||
1288 | jermar | 240 | memcpy_from_uspace: |
241 | memcpy_to_uspace: |
||
242 | |||
860 | decky | 243 | srwi. r7, r5, 3 |
244 | addi r6, r3, -4 |
||
245 | addi r4, r4, -4 |
||
246 | beq 2f |
||
247 | |||
248 | andi. r0, r6, 3 |
||
249 | mtctr r7 |
||
250 | bne 5f |
||
251 | |||
252 | 1: |
||
253 | |||
254 | lwz r7, 4(r4) |
||
255 | lwzu r8, 8(r4) |
||
256 | stw r7, 4(r6) |
||
257 | stwu r8, 8(r6) |
||
258 | bdnz 1b |
||
259 | |||
260 | andi. r5, r5, 7 |
||
261 | |||
262 | 2: |
||
263 | |||
264 | cmplwi 0, r5, 4 |
||
265 | blt 3f |
||
266 | |||
267 | lwzu r0, 4(r4) |
||
268 | addi r5, r5, -4 |
||
269 | stwu r0, 4(r6) |
||
270 | |||
271 | 3: |
||
272 | |||
273 | cmpwi 0, r5, 0 |
||
274 | beqlr |
||
275 | mtctr r5 |
||
276 | addi r4, r4, 3 |
||
277 | addi r6, r6, 3 |
||
278 | |||
279 | 4: |
||
280 | |||
281 | lbzu r0, 1(r4) |
||
282 | stbu r0, 1(r6) |
||
283 | bdnz 4b |
||
210 | decky | 284 | blr |
860 | decky | 285 | |
286 | 5: |
||
287 | |||
288 | subfic r0, r0, 4 |
||
289 | mtctr r0 |
||
290 | |||
291 | 6: |
||
292 | |||
293 | lbz r7, 4(r4) |
||
294 | addi r4, r4, 1 |
||
295 | stb r7, 4(r6) |
||
296 | addi r6, r6, 1 |
||
297 | bdnz 6b |
||
298 | subf r5, r0, r5 |
||
299 | rlwinm. r7, r5, 32-3, 3, 31 |
||
300 | beq 2b |
||
301 | mtctr r7 |
||
302 | b 1b |
||
1288 | jermar | 303 | |
304 | memcpy_from_uspace_failover_address: |
||
305 | memcpy_to_uspace_failover_address: |
||
306 | b memcpy_from_uspace_failover_address |