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Rev | Author | Line No. | Line |
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162 | decky | 1 | # |
2071 | jermar | 2 | # Copyright (c) 2005 Martin Decky |
162 | decky | 3 | # All rights reserved. |
4 | # |
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5 | # Redistribution and use in source and binary forms, with or without |
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6 | # modification, are permitted provided that the following conditions |
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7 | # are met: |
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8 | # |
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9 | # - Redistributions of source code must retain the above copyright |
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10 | # notice, this list of conditions and the following disclaimer. |
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11 | # - Redistributions in binary form must reproduce the above copyright |
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12 | # notice, this list of conditions and the following disclaimer in the |
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13 | # documentation and/or other materials provided with the distribution. |
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14 | # - The name of the author may not be used to endorse or promote products |
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15 | # derived from this software without specific prior written permission. |
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16 | # |
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17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | # |
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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 |
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1288 | jermar | 38 | .global memcpy_from_uspace |
39 | .global memcpy_to_uspace |
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40 | .global memcpy_from_uspace_failover_address |
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41 | .global memcpy_to_uspace_failover_address |
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185 | decky | 42 | |
1220 | decky | 43 | userspace_asm: |
44 | |||
45 | # r3 = uspace_uarg |
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46 | # r4 = stack |
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1267 | decky | 47 | # r5 = entry |
48 | |||
49 | # disable interrupts |
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1220 | decky | 50 | |
51 | mfmsr r31 |
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52 | rlwinm r31, r31, 0, 17, 15 |
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53 | mtmsr r31 |
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54 | |||
55 | # set entry point |
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56 | |||
57 | mtsrr0 r5 |
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58 | |||
59 | # set problem state, enable interrupts |
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60 | |||
1267 | decky | 61 | ori r31, r31, msr_pr |
62 | ori r31, r31, msr_ee |
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1220 | decky | 63 | mtsrr1 r31 |
64 | |||
65 | # set stack |
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66 | |||
67 | mr sp, r4 |
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3222 | svoboda | 68 | |
3585 | svoboda | 69 | # %r6 is defined to hold pcb_ptr - set it to 0 |
3222 | svoboda | 70 | |
3585 | svoboda | 71 | xor r6, r6, r6 |
1220 | decky | 72 | |
73 | # jump to userspace |
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74 | |||
75 | rfi |
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76 | |||
1004 | decky | 77 | iret: |
1277 | decky | 78 | |
79 | # disable interrupts |
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80 | |||
81 | mfmsr r31 |
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82 | rlwinm r31, r31, 0, 17, 15 |
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83 | mtmsr r31 |
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84 | |||
1355 | decky | 85 | lwz r0, 8(sp) |
86 | lwz r2, 12(sp) |
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87 | lwz r3, 16(sp) |
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88 | lwz r4, 20(sp) |
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89 | lwz r5, 24(sp) |
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90 | lwz r6, 28(sp) |
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91 | lwz r7, 32(sp) |
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92 | lwz r8, 36(sp) |
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93 | lwz r9, 40(sp) |
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94 | lwz r10, 44(sp) |
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95 | lwz r11, 48(sp) |
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96 | lwz r13, 52(sp) |
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97 | lwz r14, 56(sp) |
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98 | lwz r15, 60(sp) |
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99 | lwz r16, 64(sp) |
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100 | lwz r17, 68(sp) |
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101 | lwz r18, 72(sp) |
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102 | lwz r19, 76(sp) |
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103 | lwz r20, 80(sp) |
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104 | lwz r21, 84(sp) |
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105 | lwz r22, 88(sp) |
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106 | lwz r23, 92(sp) |
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107 | lwz r24, 96(sp) |
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108 | lwz r25, 100(sp) |
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109 | lwz r26, 104(sp) |
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110 | lwz r27, 108(sp) |
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111 | lwz r28, 112(sp) |
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112 | lwz r29, 116(sp) |
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113 | lwz r30, 120(sp) |
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114 | lwz r31, 124(sp) |
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1004 | decky | 115 | |
1355 | decky | 116 | lwz r12, 128(sp) |
1277 | decky | 117 | mtcr r12 |
118 | |||
1355 | decky | 119 | lwz r12, 132(sp) |
1267 | decky | 120 | mtsrr0 r12 |
1004 | decky | 121 | |
1355 | decky | 122 | lwz r12, 136(sp) |
1267 | decky | 123 | mtsrr1 r12 |
124 | |||
1355 | decky | 125 | lwz r12, 140(sp) |
1267 | decky | 126 | mtlr r12 |
127 | |||
1355 | decky | 128 | lwz r12, 144(sp) |
1277 | decky | 129 | mtctr r12 |
130 | |||
1355 | decky | 131 | lwz r12, 148(sp) |
1277 | decky | 132 | mtxer r12 |
133 | |||
1355 | decky | 134 | lwz r12, 152(sp) |
135 | lwz sp, 156(sp) |
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1277 | decky | 136 | |
137 | rfi |
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138 | |||
139 | iret_syscall: |
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140 | |||
1384 | decky | 141 | # reset decrementer |
142 | |||
143 | li r31, 1000 |
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144 | mtdec r31 |
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145 | |||
1277 | decky | 146 | # disable interrupts |
147 | |||
148 | mfmsr r31 |
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149 | rlwinm r31, r31, 0, 17, 15 |
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150 | mtmsr r31 |
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151 | |||
1355 | decky | 152 | lwz r0, 8(sp) |
153 | lwz r2, 12(sp) |
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154 | lwz r4, 20(sp) |
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155 | lwz r5, 24(sp) |
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156 | lwz r6, 28(sp) |
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157 | lwz r7, 32(sp) |
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158 | lwz r8, 36(sp) |
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159 | lwz r9, 40(sp) |
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160 | lwz r10, 44(sp) |
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161 | lwz r11, 48(sp) |
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162 | lwz r13, 52(sp) |
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163 | lwz r14, 56(sp) |
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164 | lwz r15, 60(sp) |
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165 | lwz r16, 64(sp) |
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166 | lwz r17, 68(sp) |
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167 | lwz r18, 72(sp) |
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168 | lwz r19, 76(sp) |
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169 | lwz r20, 80(sp) |
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170 | lwz r21, 84(sp) |
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171 | lwz r22, 88(sp) |
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172 | lwz r23, 92(sp) |
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173 | lwz r24, 96(sp) |
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174 | lwz r25, 100(sp) |
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175 | lwz r26, 104(sp) |
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176 | lwz r27, 108(sp) |
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177 | lwz r28, 112(sp) |
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178 | lwz r29, 116(sp) |
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179 | lwz r30, 120(sp) |
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180 | lwz r31, 124(sp) |
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1277 | decky | 181 | |
1355 | decky | 182 | lwz r12, 128(sp) |
1267 | decky | 183 | mtcr r12 |
184 | |||
1355 | decky | 185 | lwz r12, 132(sp) |
1277 | decky | 186 | mtsrr0 r12 |
187 | |||
1355 | decky | 188 | lwz r12, 136(sp) |
1277 | decky | 189 | mtsrr1 r12 |
190 | |||
1355 | decky | 191 | lwz r12, 140(sp) |
1277 | decky | 192 | mtlr r12 |
193 | |||
1355 | decky | 194 | lwz r12, 144(sp) |
1267 | decky | 195 | mtctr r12 |
196 | |||
1355 | decky | 197 | lwz r12, 148(sp) |
1267 | decky | 198 | mtxer r12 |
1277 | decky | 199 | |
1355 | decky | 200 | lwz r12, 152(sp) |
201 | lwz sp, 156(sp) |
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1267 | decky | 202 | |
1004 | decky | 203 | rfi |
204 | |||
210 | decky | 205 | memsetb: |
3200 | svoboda | 206 | b _memsetb |
210 | decky | 207 | |
208 | memcpy: |
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1288 | jermar | 209 | memcpy_from_uspace: |
210 | memcpy_to_uspace: |
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211 | |||
860 | decky | 212 | srwi. r7, r5, 3 |
213 | addi r6, r3, -4 |
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214 | addi r4, r4, -4 |
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215 | beq 2f |
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216 | |||
217 | andi. r0, r6, 3 |
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218 | mtctr r7 |
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219 | bne 5f |
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220 | |||
221 | 1: |
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222 | |||
223 | lwz r7, 4(r4) |
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224 | lwzu r8, 8(r4) |
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225 | stw r7, 4(r6) |
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226 | stwu r8, 8(r6) |
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227 | bdnz 1b |
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228 | |||
229 | andi. r5, r5, 7 |
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230 | |||
231 | 2: |
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232 | |||
233 | cmplwi 0, r5, 4 |
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234 | blt 3f |
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235 | |||
236 | lwzu r0, 4(r4) |
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237 | addi r5, r5, -4 |
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238 | stwu r0, 4(r6) |
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239 | |||
240 | 3: |
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241 | |||
242 | cmpwi 0, r5, 0 |
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243 | beqlr |
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244 | mtctr r5 |
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245 | addi r4, r4, 3 |
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246 | addi r6, r6, 3 |
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247 | |||
248 | 4: |
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249 | |||
250 | lbzu r0, 1(r4) |
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251 | stbu r0, 1(r6) |
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252 | bdnz 4b |
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210 | decky | 253 | blr |
860 | decky | 254 | |
255 | 5: |
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256 | |||
257 | subfic r0, r0, 4 |
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258 | mtctr r0 |
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259 | |||
260 | 6: |
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261 | |||
262 | lbz r7, 4(r4) |
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263 | addi r4, r4, 1 |
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264 | stb r7, 4(r6) |
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265 | addi r6, r6, 1 |
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266 | bdnz 6b |
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267 | subf r5, r0, r5 |
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268 | rlwinm. r7, r5, 32-3, 3, 31 |
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269 | beq 2b |
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270 | mtctr r7 |
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271 | b 1b |
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1288 | jermar | 272 | |
273 | memcpy_from_uspace_failover_address: |
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274 | memcpy_to_uspace_failover_address: |
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3189 | jermar | 275 | # return zero, failure |
276 | xor r3, r3, r3 |
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277 | blr |