1 /* 2 * OpenRISC system instructions helper routines 3 * 4 * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> 5 * Zhizhou Zhang <etouzh@gmail.com> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "exec/exec-all.h" 24 #include "exec/helper-proto.h" 25 #include "exception.h" 26 #include "sysemu/sysemu.h" 27 28 #define TO_SPR(group, number) (((group) << 11) + (number)) 29 30 void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) 31 { 32 #ifndef CONFIG_USER_ONLY 33 OpenRISCCPU *cpu = openrisc_env_get_cpu(env); 34 CPUState *cs = CPU(cpu); 35 target_ulong mr; 36 int idx; 37 38 switch (spr) { 39 case TO_SPR(0, 0): /* VR */ 40 env->vr = rb; 41 break; 42 43 case TO_SPR(0, 11): /* EVBAR */ 44 env->evbar = rb; 45 break; 46 47 case TO_SPR(0, 16): /* NPC */ 48 cpu_restore_state(cs, GETPC(), true); 49 /* ??? Mirror or1ksim in not trashing delayed branch state 50 when "jumping" to the current instruction. */ 51 if (env->pc != rb) { 52 env->pc = rb; 53 env->dflag = 0; 54 cpu_loop_exit(cs); 55 } 56 break; 57 58 case TO_SPR(0, 17): /* SR */ 59 cpu_set_sr(env, rb); 60 break; 61 62 case TO_SPR(0, 18): /* PPC */ 63 env->ppc = rb; 64 break; 65 66 case TO_SPR(0, 32): /* EPCR */ 67 env->epcr = rb; 68 break; 69 70 case TO_SPR(0, 48): /* EEAR */ 71 env->eear = rb; 72 break; 73 74 case TO_SPR(0, 64): /* ESR */ 75 env->esr = rb; 76 break; 77 78 case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */ 79 idx = (spr - 1024); 80 env->shadow_gpr[idx / 32][idx % 32] = rb; 81 break; 82 83 case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */ 84 idx = spr - TO_SPR(1, 512); 85 mr = env->tlb.dtlb[idx].mr; 86 if (mr & 1) { 87 tlb_flush_page(cs, mr & TARGET_PAGE_MASK); 88 } 89 if (rb & 1) { 90 tlb_flush_page(cs, rb & TARGET_PAGE_MASK); 91 } 92 env->tlb.dtlb[idx].mr = rb; 93 break; 94 case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */ 95 idx = spr - TO_SPR(1, 640); 96 env->tlb.dtlb[idx].tr = rb; 97 break; 98 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ 99 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ 100 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */ 101 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */ 102 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */ 103 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */ 104 break; 105 106 case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */ 107 idx = spr - TO_SPR(2, 512); 108 mr = env->tlb.itlb[idx].mr; 109 if (mr & 1) { 110 tlb_flush_page(cs, mr & TARGET_PAGE_MASK); 111 } 112 if (rb & 1) { 113 tlb_flush_page(cs, rb & TARGET_PAGE_MASK); 114 } 115 env->tlb.itlb[idx].mr = rb; 116 break; 117 case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */ 118 idx = spr - TO_SPR(2, 640); 119 env->tlb.itlb[idx].tr = rb; 120 break; 121 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ 122 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ 123 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */ 124 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */ 125 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */ 126 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */ 127 break; 128 129 case TO_SPR(5, 1): /* MACLO */ 130 env->mac = deposit64(env->mac, 0, 32, rb); 131 break; 132 case TO_SPR(5, 2): /* MACHI */ 133 env->mac = deposit64(env->mac, 32, 32, rb); 134 break; 135 case TO_SPR(8, 0): /* PMR */ 136 env->pmr = rb; 137 if (env->pmr & PMR_DME || env->pmr & PMR_SME) { 138 cpu_restore_state(cs, GETPC(), true); 139 env->pc += 4; 140 cs->halted = 1; 141 raise_exception(cpu, EXCP_HALTED); 142 } 143 break; 144 case TO_SPR(9, 0): /* PICMR */ 145 env->picmr = rb; 146 break; 147 case TO_SPR(9, 2): /* PICSR */ 148 env->picsr &= ~rb; 149 break; 150 case TO_SPR(10, 0): /* TTMR */ 151 { 152 if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) { 153 switch (rb & TTMR_M) { 154 case TIMER_NONE: 155 cpu_openrisc_count_stop(cpu); 156 break; 157 case TIMER_INTR: 158 case TIMER_SHOT: 159 case TIMER_CONT: 160 cpu_openrisc_count_start(cpu); 161 break; 162 default: 163 break; 164 } 165 } 166 167 int ip = env->ttmr & TTMR_IP; 168 169 if (rb & TTMR_IP) { /* Keep IP bit. */ 170 env->ttmr = (rb & ~TTMR_IP) | ip; 171 } else { /* Clear IP bit. */ 172 env->ttmr = rb & ~TTMR_IP; 173 cs->interrupt_request &= ~CPU_INTERRUPT_TIMER; 174 } 175 176 cpu_openrisc_timer_update(cpu); 177 } 178 break; 179 180 case TO_SPR(10, 1): /* TTCR */ 181 cpu_openrisc_count_set(cpu, rb); 182 if (env->ttmr & TIMER_NONE) { 183 return; 184 } 185 cpu_openrisc_timer_update(cpu); 186 break; 187 default: 188 break; 189 } 190 #endif 191 } 192 193 target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd, 194 target_ulong spr) 195 { 196 #ifndef CONFIG_USER_ONLY 197 OpenRISCCPU *cpu = openrisc_env_get_cpu(env); 198 CPUState *cs = CPU(cpu); 199 int idx; 200 201 switch (spr) { 202 case TO_SPR(0, 0): /* VR */ 203 return env->vr & SPR_VR; 204 205 case TO_SPR(0, 1): /* UPR */ 206 return env->upr; /* TT, DM, IM, UP present */ 207 208 case TO_SPR(0, 2): /* CPUCFGR */ 209 return env->cpucfgr; 210 211 case TO_SPR(0, 3): /* DMMUCFGR */ 212 return env->dmmucfgr; /* 1Way, 64 entries */ 213 214 case TO_SPR(0, 4): /* IMMUCFGR */ 215 return env->immucfgr; 216 217 case TO_SPR(0, 11): /* EVBAR */ 218 return env->evbar; 219 220 case TO_SPR(0, 16): /* NPC (equals PC) */ 221 cpu_restore_state(cs, GETPC(), false); 222 return env->pc; 223 224 case TO_SPR(0, 17): /* SR */ 225 return cpu_get_sr(env); 226 227 case TO_SPR(0, 18): /* PPC */ 228 cpu_restore_state(cs, GETPC(), false); 229 return env->ppc; 230 231 case TO_SPR(0, 32): /* EPCR */ 232 return env->epcr; 233 234 case TO_SPR(0, 48): /* EEAR */ 235 return env->eear; 236 237 case TO_SPR(0, 64): /* ESR */ 238 return env->esr; 239 240 case TO_SPR(0, 128): /* COREID */ 241 return cpu->parent_obj.cpu_index; 242 243 case TO_SPR(0, 129): /* NUMCORES */ 244 return max_cpus; 245 246 case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */ 247 idx = (spr - 1024); 248 return env->shadow_gpr[idx / 32][idx % 32]; 249 250 case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */ 251 idx = spr - TO_SPR(1, 512); 252 return env->tlb.dtlb[idx].mr; 253 254 case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */ 255 idx = spr - TO_SPR(1, 640); 256 return env->tlb.dtlb[idx].tr; 257 258 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ 259 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ 260 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */ 261 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */ 262 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */ 263 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */ 264 break; 265 266 case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */ 267 idx = spr - TO_SPR(2, 512); 268 return env->tlb.itlb[idx].mr; 269 270 case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */ 271 idx = spr - TO_SPR(2, 640); 272 return env->tlb.itlb[idx].tr; 273 274 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ 275 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ 276 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */ 277 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */ 278 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */ 279 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */ 280 break; 281 282 case TO_SPR(5, 1): /* MACLO */ 283 return (uint32_t)env->mac; 284 break; 285 case TO_SPR(5, 2): /* MACHI */ 286 return env->mac >> 32; 287 break; 288 289 case TO_SPR(8, 0): /* PMR */ 290 return env->pmr; 291 292 case TO_SPR(9, 0): /* PICMR */ 293 return env->picmr; 294 295 case TO_SPR(9, 2): /* PICSR */ 296 return env->picsr; 297 298 case TO_SPR(10, 0): /* TTMR */ 299 return env->ttmr; 300 301 case TO_SPR(10, 1): /* TTCR */ 302 cpu_openrisc_count_update(cpu); 303 return cpu_openrisc_count_get(cpu); 304 305 default: 306 break; 307 } 308 #endif 309 310 /* for rd is passed in, if rd unchanged, just keep it back. */ 311 return rd; 312 } 313