1 /* 2 * Miscellaneous PowerPC emulation helpers for QEMU. 3 * 4 * Copyright (c) 2003-2007 Jocelyn Mayer 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu/log.h" 22 #include "cpu.h" 23 #include "exec/exec-all.h" 24 #include "exec/helper-proto.h" 25 #include "qemu/error-report.h" 26 #include "qemu/main-loop.h" 27 #include "mmu-book3s-v3.h" 28 #include "hw/ppc/ppc.h" 29 30 #include "helper_regs.h" 31 32 /*****************************************************************************/ 33 /* SPR accesses */ 34 void helper_load_dump_spr(CPUPPCState *env, uint32_t sprn) 35 { 36 qemu_log("Read SPR %d %03x => " TARGET_FMT_lx "\n", sprn, sprn, 37 env->spr[sprn]); 38 } 39 40 void helper_store_dump_spr(CPUPPCState *env, uint32_t sprn) 41 { 42 qemu_log("Write SPR %d %03x <= " TARGET_FMT_lx "\n", sprn, sprn, 43 env->spr[sprn]); 44 } 45 46 #ifdef TARGET_PPC64 47 static void raise_hv_fu_exception(CPUPPCState *env, uint32_t bit, 48 const char *caller, uint32_t cause, 49 uintptr_t raddr) 50 { 51 qemu_log_mask(CPU_LOG_INT, "HV Facility %d is unavailable (%s)\n", 52 bit, caller); 53 54 env->spr[SPR_HFSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS); 55 56 raise_exception_err_ra(env, POWERPC_EXCP_HV_FU, cause, raddr); 57 } 58 59 static void raise_fu_exception(CPUPPCState *env, uint32_t bit, 60 uint32_t sprn, uint32_t cause, 61 uintptr_t raddr) 62 { 63 qemu_log("Facility SPR %d is unavailable (SPR FSCR:%d)\n", sprn, bit); 64 65 env->spr[SPR_FSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS); 66 cause &= FSCR_IC_MASK; 67 env->spr[SPR_FSCR] |= (target_ulong)cause << FSCR_IC_POS; 68 69 raise_exception_err_ra(env, POWERPC_EXCP_FU, 0, raddr); 70 } 71 #endif 72 73 void helper_hfscr_facility_check(CPUPPCState *env, uint32_t bit, 74 const char *caller, uint32_t cause) 75 { 76 #ifdef TARGET_PPC64 77 if ((env->msr_mask & MSR_HVB) && !FIELD_EX64(env->msr, MSR, HV) && 78 !(env->spr[SPR_HFSCR] & (1UL << bit))) { 79 raise_hv_fu_exception(env, bit, caller, cause, GETPC()); 80 } 81 #endif 82 } 83 84 void helper_fscr_facility_check(CPUPPCState *env, uint32_t bit, 85 uint32_t sprn, uint32_t cause) 86 { 87 #ifdef TARGET_PPC64 88 if (env->spr[SPR_FSCR] & (1ULL << bit)) { 89 /* Facility is enabled, continue */ 90 return; 91 } 92 raise_fu_exception(env, bit, sprn, cause, GETPC()); 93 #endif 94 } 95 96 void helper_msr_facility_check(CPUPPCState *env, uint32_t bit, 97 uint32_t sprn, uint32_t cause) 98 { 99 #ifdef TARGET_PPC64 100 if (env->msr & (1ULL << bit)) { 101 /* Facility is enabled, continue */ 102 return; 103 } 104 raise_fu_exception(env, bit, sprn, cause, GETPC()); 105 #endif 106 } 107 108 #if !defined(CONFIG_USER_ONLY) 109 110 void helper_store_sdr1(CPUPPCState *env, target_ulong val) 111 { 112 if (env->spr[SPR_SDR1] != val) { 113 ppc_store_sdr1(env, val); 114 tlb_flush(env_cpu(env)); 115 } 116 } 117 118 #if defined(TARGET_PPC64) 119 void helper_store_ptcr(CPUPPCState *env, target_ulong val) 120 { 121 if (env->spr[SPR_PTCR] != val) { 122 PowerPCCPU *cpu = env_archcpu(env); 123 target_ulong ptcr_mask = PTCR_PATB | PTCR_PATS; 124 target_ulong patbsize = val & PTCR_PATS; 125 126 qemu_log_mask(CPU_LOG_MMU, "%s: " TARGET_FMT_lx "\n", __func__, val); 127 128 assert(!cpu->vhyp); 129 assert(env->mmu_model & POWERPC_MMU_3_00); 130 131 if (val & ~ptcr_mask) { 132 error_report("Invalid bits 0x"TARGET_FMT_lx" set in PTCR", 133 val & ~ptcr_mask); 134 val &= ptcr_mask; 135 } 136 137 if (patbsize > 24) { 138 error_report("Invalid Partition Table size 0x" TARGET_FMT_lx 139 " stored in PTCR", patbsize); 140 return; 141 } 142 143 env->spr[SPR_PTCR] = val; 144 tlb_flush(env_cpu(env)); 145 } 146 } 147 148 void helper_store_pcr(CPUPPCState *env, target_ulong value) 149 { 150 PowerPCCPU *cpu = env_archcpu(env); 151 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 152 153 env->spr[SPR_PCR] = value & pcc->pcr_mask; 154 } 155 156 /* 157 * DPDES register is shared. Each bit reflects the state of the 158 * doorbell interrupt of a thread of the same core. 159 */ 160 target_ulong helper_load_dpdes(CPUPPCState *env) 161 { 162 target_ulong dpdes = 0; 163 164 helper_hfscr_facility_check(env, HFSCR_MSGP, "load DPDES", HFSCR_IC_MSGP); 165 166 /* TODO: TCG supports only one thread */ 167 if (env->pending_interrupts & PPC_INTERRUPT_DOORBELL) { 168 dpdes = 1; 169 } 170 171 return dpdes; 172 } 173 174 void helper_store_dpdes(CPUPPCState *env, target_ulong val) 175 { 176 PowerPCCPU *cpu = env_archcpu(env); 177 178 helper_hfscr_facility_check(env, HFSCR_MSGP, "store DPDES", HFSCR_IC_MSGP); 179 180 /* TODO: TCG supports only one thread */ 181 if (val & ~0x1) { 182 qemu_log_mask(LOG_GUEST_ERROR, "Invalid DPDES register value " 183 TARGET_FMT_lx"\n", val); 184 return; 185 } 186 187 ppc_set_irq(cpu, PPC_INTERRUPT_DOORBELL, val & 0x1); 188 } 189 #endif /* defined(TARGET_PPC64) */ 190 191 void helper_store_pidr(CPUPPCState *env, target_ulong val) 192 { 193 env->spr[SPR_BOOKS_PID] = (uint32_t)val; 194 tlb_flush(env_cpu(env)); 195 } 196 197 void helper_store_lpidr(CPUPPCState *env, target_ulong val) 198 { 199 env->spr[SPR_LPIDR] = (uint32_t)val; 200 201 /* 202 * We need to flush the TLB on LPID changes as we only tag HV vs 203 * guest in TCG TLB. Also the quadrants means the HV will 204 * potentially access and cache entries for the current LPID as 205 * well. 206 */ 207 tlb_flush(env_cpu(env)); 208 } 209 210 void helper_store_40x_dbcr0(CPUPPCState *env, target_ulong val) 211 { 212 /* Bits 26 & 27 affect single-stepping. */ 213 hreg_compute_hflags(env); 214 /* Bits 28 & 29 affect reset or shutdown. */ 215 store_40x_dbcr0(env, val); 216 } 217 218 void helper_store_40x_sler(CPUPPCState *env, target_ulong val) 219 { 220 store_40x_sler(env, val); 221 } 222 #endif 223 224 /*****************************************************************************/ 225 /* Special registers manipulation */ 226 227 /* 228 * This code is lifted from MacOnLinux. It is called whenever THRM1,2 229 * or 3 is read an fixes up the values in such a way that will make 230 * MacOS not hang. These registers exist on some 75x and 74xx 231 * processors. 232 */ 233 void helper_fixup_thrm(CPUPPCState *env) 234 { 235 target_ulong v, t; 236 int i; 237 238 #define THRM1_TIN (1 << 31) 239 #define THRM1_TIV (1 << 30) 240 #define THRM1_THRES(x) (((x) & 0x7f) << 23) 241 #define THRM1_TID (1 << 2) 242 #define THRM1_TIE (1 << 1) 243 #define THRM1_V (1 << 0) 244 #define THRM3_E (1 << 0) 245 246 if (!(env->spr[SPR_THRM3] & THRM3_E)) { 247 return; 248 } 249 250 /* Note: Thermal interrupts are unimplemented */ 251 for (i = SPR_THRM1; i <= SPR_THRM2; i++) { 252 v = env->spr[i]; 253 if (!(v & THRM1_V)) { 254 continue; 255 } 256 v |= THRM1_TIV; 257 v &= ~THRM1_TIN; 258 t = v & THRM1_THRES(127); 259 if ((v & THRM1_TID) && t < THRM1_THRES(24)) { 260 v |= THRM1_TIN; 261 } 262 if (!(v & THRM1_TID) && t > THRM1_THRES(24)) { 263 v |= THRM1_TIN; 264 } 265 env->spr[i] = v; 266 } 267 } 268