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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 | #include <arch/asm/regname.h> |
29 | #include <arch/asm/regname.h> |
| 30 | 30 | ||
| 31 | .text |
31 | .text |
| 32 | 32 | ||
| 33 | .global userspace_asm |
33 | .global userspace_asm |
| 34 | .global iret |
34 | .global iret |
| 35 | .global memsetb |
35 | .global memsetb |
| 36 | .global memcpy |
36 | .global memcpy |
| 37 | 37 | ||
| 38 | userspace_asm: |
38 | userspace_asm: |
| 39 | 39 | ||
| 40 | # r3 = uspace_uarg |
40 | # r3 = uspace_uarg |
| 41 | # r4 = stack |
41 | # r4 = stack |
| 42 | # r5 = entry |
42 | # r5 = entry |
| - | 43 | ||
| - | 44 | # disable interrupts |
|
| 43 | 45 | ||
| 44 | mfmsr r31 |
46 | mfmsr r31 |
| 45 | rlwinm r31, r31, 0, 17, 15 |
47 | rlwinm r31, r31, 0, 17, 15 |
| 46 | mtmsr r31 |
48 | mtmsr r31 |
| 47 | 49 | ||
| 48 | # set entry point |
50 | # set entry point |
| 49 | 51 | ||
| 50 | mtsrr0 r5 |
52 | mtsrr0 r5 |
| 51 | 53 | ||
| 52 | # set problem state, enable interrupts |
54 | # set problem state, enable interrupts |
| 53 | 55 | ||
| 54 | ori r31, r31, 1 << 14 |
56 | ori r31, r31, msr_pr |
| 55 | ori r31, r31, 1 << 15 |
57 | ori r31, r31, msr_ee |
| 56 | mtsrr1 r31 |
58 | mtsrr1 r31 |
| 57 | 59 | ||
| 58 | # set stack |
60 | # set stack |
| 59 | 61 | ||
| 60 | mr sp, r4 |
62 | mr sp, r4 |
| 61 | 63 | ||
| 62 | # jump to userspace |
64 | # jump to userspace |
| 63 | 65 | ||
| 64 | rfi |
66 | rfi |
| 65 | 67 | ||
| 66 | iret: |
68 | iret: |
| 67 | lwz r3, 144(sp) |
- | |
| 68 | mtxer r3 |
- | |
| 69 | - | ||
| 70 | lwz r3, 140(sp) |
- | |
| 71 | mtctr r3 |
- | |
| 72 | - | ||
| 73 | lwz r3, 136(sp) |
- | |
| 74 | mtcr r3 |
- | |
| 75 | - | ||
| 76 | lwz r3, 132(sp) |
- | |
| 77 | mtlr r3 |
- | |
| 78 | - | ||
| 79 | lwz r3, 128(sp) |
- | |
| 80 | mtspr srr1, r3 |
- | |
| 81 | - | ||
| 82 | lwz r3, 124(sp) |
- | |
| 83 | mtspr srr0, r3 |
- | |
| 84 | - | ||
| 85 | lwz r0, 0(sp) |
69 | lwz r0, 0(sp) |
| 86 | lwz r2, 4(sp) |
70 | lwz r2, 4(sp) |
| 87 | lwz r3, 8(sp) |
71 | lwz r3, 8(sp) |
| 88 | lwz r4, 12(sp) |
72 | lwz r4, 12(sp) |
| 89 | lwz r5, 16(sp) |
73 | lwz r5, 16(sp) |
| 90 | lwz r6, 20(sp) |
74 | lwz r6, 20(sp) |
| 91 | lwz r7, 24(sp) |
75 | lwz r7, 24(sp) |
| 92 | lwz r8, 28(sp) |
76 | lwz r8, 28(sp) |
| 93 | lwz r9, 32(sp) |
77 | lwz r9, 32(sp) |
| 94 | lwz r10, 36(sp) |
78 | lwz r10, 36(sp) |
| 95 | lwz r11, 40(sp) |
79 | lwz r11, 40(sp) |
| 96 | lwz r12, 44(sp) |
80 | lwz r13, 44(sp) |
| 97 | lwz r13, 48(sp) |
81 | lwz r14, 48(sp) |
| 98 | lwz r14, 52(sp) |
82 | lwz r15, 52(sp) |
| 99 | lwz r15, 56(sp) |
83 | lwz r16, 56(sp) |
| 100 | lwz r16, 60(sp) |
84 | lwz r17, 60(sp) |
| 101 | lwz r17, 64(sp) |
85 | lwz r18, 64(sp) |
| 102 | lwz r18, 68(sp) |
86 | lwz r19, 68(sp) |
| 103 | lwz r19, 72(sp) |
87 | lwz r20, 72(sp) |
| 104 | lwz r20, 76(sp) |
88 | lwz r21, 76(sp) |
| 105 | lwz r21, 80(sp) |
89 | lwz r22, 80(sp) |
| 106 | lwz r22, 84(sp) |
90 | lwz r23, 84(sp) |
| 107 | lwz r23, 88(sp) |
91 | lwz r24, 88(sp) |
| 108 | lwz r24, 92(sp) |
92 | lwz r25, 92(sp) |
| 109 | lwz r25, 96(sp) |
93 | lwz r26, 96(sp) |
| 110 | lwz r26, 100(sp) |
94 | lwz r27, 100(sp) |
| 111 | lwz r27, 104(sp) |
95 | lwz r28, 104(sp) |
| 112 | lwz r28, 108(sp) |
96 | lwz r29, 108(sp) |
| 113 | lwz r29, 112(sp) |
97 | lwz r30, 112(sp) |
| 114 | lwz r30, 116(sp) |
98 | lwz r31, 116(sp) |
| - | 99 | ||
| 115 | lwz r31, 120(sp) |
100 | lwz r12, 120(sp) |
| - | 101 | mtsrr0 r12 |
|
| - | 102 | ||
| - | 103 | lwz r12, 124(sp) |
|
| - | 104 | mtsrr1 r12 |
|
| - | 105 | ||
| - | 106 | lwz r12, 128(sp) |
|
| - | 107 | mtlr r12 |
|
| - | 108 | ||
| - | 109 | lwz r12, 132(sp) |
|
| - | 110 | mtcr r12 |
|
| 116 | 111 | ||
| - | 112 | lwz r12, 136(sp) |
|
| - | 113 | mtctr r12 |
|
| - | 114 | ||
| - | 115 | lwz r12, 140(sp) |
|
| - | 116 | mtxer r12 |
|
| - | 117 | ||
| 117 | mfspr sp, sprg1 |
118 | mfsprg1 sp |
| - | 119 | mfsprg2 r12 |
|
| 118 | 120 | ||
| 119 | rfi |
121 | rfi |
| 120 | 122 | ||
| 121 | memsetb: |
123 | memsetb: |
| 122 | rlwimi r5, r5, 8, 16, 23 |
124 | rlwimi r5, r5, 8, 16, 23 |
| 123 | rlwimi r5, r5, 16, 0, 15 |
125 | rlwimi r5, r5, 16, 0, 15 |
| 124 | 126 | ||
| 125 | addi r14, r3, -4 |
127 | addi r14, r3, -4 |
| 126 | 128 | ||
| 127 | cmplwi 0, r4, 4 |
129 | cmplwi 0, r4, 4 |
| 128 | blt 7f |
130 | blt 7f |
| 129 | 131 | ||
| 130 | stwu r5, 4(r14) |
132 | stwu r5, 4(r14) |
| 131 | beqlr |
133 | beqlr |
| 132 | 134 | ||
| 133 | andi. r15, r14, 3 |
135 | andi. r15, r14, 3 |
| 134 | add r4, r15, r4 |
136 | add r4, r15, r4 |
| 135 | subf r14, r15, r14 |
137 | subf r14, r15, r14 |
| 136 | srwi r15, r4, 2 |
138 | srwi r15, r4, 2 |
| 137 | mtctr r15 |
139 | mtctr r15 |
| 138 | 140 | ||
| 139 | bdz 6f |
141 | bdz 6f |
| 140 | 142 | ||
| 141 | 1: |
143 | 1: |
| 142 | stwu r5, 4(r14) |
144 | stwu r5, 4(r14) |
| 143 | bdnz 1b |
145 | bdnz 1b |
| 144 | 146 | ||
| 145 | 6: |
147 | 6: |
| 146 | 148 | ||
| 147 | andi. r4, r4, 3 |
149 | andi. r4, r4, 3 |
| 148 | 150 | ||
| 149 | 7: |
151 | 7: |
| 150 | 152 | ||
| 151 | cmpwi 0, r4, 0 |
153 | cmpwi 0, r4, 0 |
| 152 | beqlr |
154 | beqlr |
| 153 | 155 | ||
| 154 | mtctr r4 |
156 | mtctr r4 |
| 155 | addi r6, r6, 3 |
157 | addi r6, r6, 3 |
| 156 | 158 | ||
| 157 | 8: |
159 | 8: |
| 158 | 160 | ||
| 159 | stbu r5, 1(r14) |
161 | stbu r5, 1(r14) |
| 160 | bdnz 8b |
162 | bdnz 8b |
| 161 | 163 | ||
| 162 | blr |
164 | blr |
| 163 | 165 | ||
| 164 | memcpy: |
166 | memcpy: |
| 165 | srwi. r7, r5, 3 |
167 | srwi. r7, r5, 3 |
| 166 | addi r6, r3, -4 |
168 | addi r6, r3, -4 |
| 167 | addi r4, r4, -4 |
169 | addi r4, r4, -4 |
| 168 | beq 2f |
170 | beq 2f |
| 169 | 171 | ||
| 170 | andi. r0, r6, 3 |
172 | andi. r0, r6, 3 |
| 171 | mtctr r7 |
173 | mtctr r7 |
| 172 | bne 5f |
174 | bne 5f |
| 173 | 175 | ||
| 174 | 1: |
176 | 1: |
| 175 | 177 | ||
| 176 | lwz r7, 4(r4) |
178 | lwz r7, 4(r4) |
| 177 | lwzu r8, 8(r4) |
179 | lwzu r8, 8(r4) |
| 178 | stw r7, 4(r6) |
180 | stw r7, 4(r6) |
| 179 | stwu r8, 8(r6) |
181 | stwu r8, 8(r6) |
| 180 | bdnz 1b |
182 | bdnz 1b |
| 181 | 183 | ||
| 182 | andi. r5, r5, 7 |
184 | andi. r5, r5, 7 |
| 183 | 185 | ||
| 184 | 2: |
186 | 2: |
| 185 | 187 | ||
| 186 | cmplwi 0, r5, 4 |
188 | cmplwi 0, r5, 4 |
| 187 | blt 3f |
189 | blt 3f |
| 188 | 190 | ||
| 189 | lwzu r0, 4(r4) |
191 | lwzu r0, 4(r4) |
| 190 | addi r5, r5, -4 |
192 | addi r5, r5, -4 |
| 191 | stwu r0, 4(r6) |
193 | stwu r0, 4(r6) |
| 192 | 194 | ||
| 193 | 3: |
195 | 3: |
| 194 | 196 | ||
| 195 | cmpwi 0, r5, 0 |
197 | cmpwi 0, r5, 0 |
| 196 | beqlr |
198 | beqlr |
| 197 | mtctr r5 |
199 | mtctr r5 |
| 198 | addi r4, r4, 3 |
200 | addi r4, r4, 3 |
| 199 | addi r6, r6, 3 |
201 | addi r6, r6, 3 |
| 200 | 202 | ||
| 201 | 4: |
203 | 4: |
| 202 | 204 | ||
| 203 | lbzu r0, 1(r4) |
205 | lbzu r0, 1(r4) |
| 204 | stbu r0, 1(r6) |
206 | stbu r0, 1(r6) |
| 205 | bdnz 4b |
207 | bdnz 4b |
| 206 | blr |
208 | blr |
| 207 | 209 | ||
| 208 | 5: |
210 | 5: |
| 209 | 211 | ||
| 210 | subfic r0, r0, 4 |
212 | subfic r0, r0, 4 |
| 211 | mtctr r0 |
213 | mtctr r0 |
| 212 | 214 | ||
| 213 | 6: |
215 | 6: |
| 214 | 216 | ||
| 215 | lbz r7, 4(r4) |
217 | lbz r7, 4(r4) |
| 216 | addi r4, r4, 1 |
218 | addi r4, r4, 1 |
| 217 | stb r7, 4(r6) |
219 | stb r7, 4(r6) |
| 218 | addi r6, r6, 1 |
220 | addi r6, r6, 1 |
| 219 | bdnz 6b |
221 | bdnz 6b |
| 220 | subf r5, r0, r5 |
222 | subf r5, r0, r5 |
| 221 | rlwinm. r7, r5, 32-3, 3, 31 |
223 | rlwinm. r7, r5, 32-3, 3, 31 |
| 222 | beq 2b |
224 | beq 2b |
| 223 | mtctr r7 |
225 | mtctr r7 |
| 224 | b 1b |
226 | b 1b |
| 225 | 227 | ||