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 "cpu.h" 22 #include "exec/exec-all.h" 23 #include "exec/helper-proto.h" 24 #include "qemu/error-report.h" 25 #include "qemu/main-loop.h" 26 27 #include "helper_regs.h" 28 29 /*****************************************************************************/ 30 /* SPR accesses */ 31 void helper_load_dump_spr(CPUPPCState *env, uint32_t sprn) 32 { 33 qemu_log("Read SPR %d %03x => " TARGET_FMT_lx "\n", sprn, sprn, 34 env->spr[sprn]); 35 } 36 37 void helper_store_dump_spr(CPUPPCState *env, uint32_t sprn) 38 { 39 qemu_log("Write SPR %d %03x <= " TARGET_FMT_lx "\n", sprn, sprn, 40 env->spr[sprn]); 41 } 42 43 #ifdef TARGET_PPC64 44 static void raise_hv_fu_exception(CPUPPCState *env, uint32_t bit, 45 const char *caller, uint32_t cause, 46 uintptr_t raddr) 47 { 48 qemu_log_mask(CPU_LOG_INT, "HV Facility %d is unavailable (%s)\n", 49 bit, caller); 50 51 env->spr[SPR_HFSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS); 52 53 raise_exception_err_ra(env, POWERPC_EXCP_HV_FU, cause, raddr); 54 } 55 56 static void raise_fu_exception(CPUPPCState *env, uint32_t bit, 57 uint32_t sprn, uint32_t cause, 58 uintptr_t raddr) 59 { 60 qemu_log("Facility SPR %d is unavailable (SPR FSCR:%d)\n", sprn, bit); 61 62 env->spr[SPR_FSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS); 63 cause &= FSCR_IC_MASK; 64 env->spr[SPR_FSCR] |= (target_ulong)cause << FSCR_IC_POS; 65 66 raise_exception_err_ra(env, POWERPC_EXCP_FU, 0, raddr); 67 } 68 #endif 69 70 void helper_hfscr_facility_check(CPUPPCState *env, uint32_t bit, 71 const char *caller, uint32_t cause) 72 { 73 #ifdef TARGET_PPC64 74 if ((env->msr_mask & MSR_HVB) && !msr_hv && 75 !(env->spr[SPR_HFSCR] & (1UL << bit))) { 76 raise_hv_fu_exception(env, bit, caller, cause, GETPC()); 77 } 78 #endif 79 } 80 81 void helper_fscr_facility_check(CPUPPCState *env, uint32_t bit, 82 uint32_t sprn, uint32_t cause) 83 { 84 #ifdef TARGET_PPC64 85 if (env->spr[SPR_FSCR] & (1ULL << bit)) { 86 /* Facility is enabled, continue */ 87 return; 88 } 89 raise_fu_exception(env, bit, sprn, cause, GETPC()); 90 #endif 91 } 92 93 void helper_msr_facility_check(CPUPPCState *env, uint32_t bit, 94 uint32_t sprn, uint32_t cause) 95 { 96 #ifdef TARGET_PPC64 97 if (env->msr & (1ULL << bit)) { 98 /* Facility is enabled, continue */ 99 return; 100 } 101 raise_fu_exception(env, bit, sprn, cause, GETPC()); 102 #endif 103 } 104 105 #if !defined(CONFIG_USER_ONLY) 106 107 void helper_store_sdr1(CPUPPCState *env, target_ulong val) 108 { 109 if (env->spr[SPR_SDR1] != val) { 110 ppc_store_sdr1(env, val); 111 tlb_flush(env_cpu(env)); 112 } 113 } 114 115 #if defined(TARGET_PPC64) 116 void helper_store_ptcr(CPUPPCState *env, target_ulong val) 117 { 118 if (env->spr[SPR_PTCR] != val) { 119 ppc_store_ptcr(env, val); 120 tlb_flush(env_cpu(env)); 121 } 122 } 123 124 void helper_store_pcr(CPUPPCState *env, target_ulong value) 125 { 126 PowerPCCPU *cpu = env_archcpu(env); 127 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 128 129 env->spr[SPR_PCR] = value & pcc->pcr_mask; 130 } 131 132 /* 133 * DPDES register is shared. Each bit reflects the state of the 134 * doorbell interrupt of a thread of the same core. 135 */ 136 target_ulong helper_load_dpdes(CPUPPCState *env) 137 { 138 target_ulong dpdes = 0; 139 140 helper_hfscr_facility_check(env, HFSCR_MSGP, "load DPDES", HFSCR_IC_MSGP); 141 142 /* TODO: TCG supports only one thread */ 143 if (env->pending_interrupts & (1 << PPC_INTERRUPT_DOORBELL)) { 144 dpdes = 1; 145 } 146 147 return dpdes; 148 } 149 150 void helper_store_dpdes(CPUPPCState *env, target_ulong val) 151 { 152 PowerPCCPU *cpu = env_archcpu(env); 153 CPUState *cs = CPU(cpu); 154 155 helper_hfscr_facility_check(env, HFSCR_MSGP, "store DPDES", HFSCR_IC_MSGP); 156 157 /* TODO: TCG supports only one thread */ 158 if (val & ~0x1) { 159 qemu_log_mask(LOG_GUEST_ERROR, "Invalid DPDES register value " 160 TARGET_FMT_lx"\n", val); 161 return; 162 } 163 164 if (val & 0x1) { 165 env->pending_interrupts |= 1 << PPC_INTERRUPT_DOORBELL; 166 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 167 } else { 168 env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL); 169 } 170 } 171 #endif /* defined(TARGET_PPC64) */ 172 173 void helper_store_pidr(CPUPPCState *env, target_ulong val) 174 { 175 env->spr[SPR_BOOKS_PID] = val; 176 tlb_flush(env_cpu(env)); 177 } 178 179 void helper_store_lpidr(CPUPPCState *env, target_ulong val) 180 { 181 env->spr[SPR_LPIDR] = val; 182 183 /* 184 * We need to flush the TLB on LPID changes as we only tag HV vs 185 * guest in TCG TLB. Also the quadrants means the HV will 186 * potentially access and cache entries for the current LPID as 187 * well. 188 */ 189 tlb_flush(env_cpu(env)); 190 } 191 192 void helper_store_hid0_601(CPUPPCState *env, target_ulong val) 193 { 194 target_ulong hid0; 195 196 hid0 = env->spr[SPR_HID0]; 197 env->spr[SPR_HID0] = (uint32_t)val; 198 199 if ((val ^ hid0) & 0x00000008) { 200 /* Change current endianness */ 201 hreg_compute_hflags(env); 202 qemu_log("%s: set endianness to %c => %08x\n", __func__, 203 val & 0x8 ? 'l' : 'b', env->hflags); 204 } 205 } 206 207 void helper_store_403_pbr(CPUPPCState *env, uint32_t num, target_ulong value) 208 { 209 if (likely(env->pb[num] != value)) { 210 env->pb[num] = value; 211 /* Should be optimized */ 212 tlb_flush(env_cpu(env)); 213 } 214 } 215 216 void helper_store_40x_dbcr0(CPUPPCState *env, target_ulong val) 217 { 218 /* Bits 26 & 27 affect single-stepping. */ 219 hreg_compute_hflags(env); 220 /* Bits 28 & 29 affect reset or shutdown. */ 221 store_40x_dbcr0(env, val); 222 } 223 224 void helper_store_40x_sler(CPUPPCState *env, target_ulong val) 225 { 226 store_40x_sler(env, val); 227 } 228 #endif 229 /*****************************************************************************/ 230 /* PowerPC 601 specific instructions (POWER bridge) */ 231 232 target_ulong helper_clcs(CPUPPCState *env, uint32_t arg) 233 { 234 switch (arg) { 235 case 0x0CUL: 236 /* Instruction cache line size */ 237 return env->icache_line_size; 238 case 0x0DUL: 239 /* Data cache line size */ 240 return env->dcache_line_size; 241 case 0x0EUL: 242 /* Minimum cache line size */ 243 return (env->icache_line_size < env->dcache_line_size) ? 244 env->icache_line_size : env->dcache_line_size; 245 case 0x0FUL: 246 /* Maximum cache line size */ 247 return (env->icache_line_size > env->dcache_line_size) ? 248 env->icache_line_size : env->dcache_line_size; 249 default: 250 /* Undefined */ 251 return 0; 252 } 253 } 254 255 /*****************************************************************************/ 256 /* Special registers manipulation */ 257 258 /* GDBstub can read and write MSR... */ 259 void ppc_store_msr(CPUPPCState *env, target_ulong value) 260 { 261 hreg_store_msr(env, value, 0); 262 } 263 264 /* 265 * This code is lifted from MacOnLinux. It is called whenever THRM1,2 266 * or 3 is read an fixes up the values in such a way that will make 267 * MacOS not hang. These registers exist on some 75x and 74xx 268 * processors. 269 */ 270 void helper_fixup_thrm(CPUPPCState *env) 271 { 272 target_ulong v, t; 273 int i; 274 275 #define THRM1_TIN (1 << 31) 276 #define THRM1_TIV (1 << 30) 277 #define THRM1_THRES(x) (((x) & 0x7f) << 23) 278 #define THRM1_TID (1 << 2) 279 #define THRM1_TIE (1 << 1) 280 #define THRM1_V (1 << 0) 281 #define THRM3_E (1 << 0) 282 283 if (!(env->spr[SPR_THRM3] & THRM3_E)) { 284 return; 285 } 286 287 /* Note: Thermal interrupts are unimplemented */ 288 for (i = SPR_THRM1; i <= SPR_THRM2; i++) { 289 v = env->spr[i]; 290 if (!(v & THRM1_V)) { 291 continue; 292 } 293 v |= THRM1_TIV; 294 v &= ~THRM1_TIN; 295 t = v & THRM1_THRES(127); 296 if ((v & THRM1_TID) && t < THRM1_THRES(24)) { 297 v |= THRM1_TIN; 298 } 299 if (!(v & THRM1_TID) && t > THRM1_THRES(24)) { 300 v |= THRM1_TIN; 301 } 302 env->spr[i] = v; 303 } 304 } 305