1 /* 2 * Sparc64 interrupt helpers 3 * 4 * Copyright (c) 2003-2005 Fabrice Bellard 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/main-loop.h" 22 #include "cpu.h" 23 #include "exec/helper-proto.h" 24 #include "exec/log.h" 25 #include "trace.h" 26 27 #define DEBUG_PCALL 28 29 #ifdef DEBUG_PCALL 30 static const char * const excp_names[0x80] = { 31 [TT_TFAULT] = "Instruction Access Fault", 32 [TT_TMISS] = "Instruction Access MMU Miss", 33 [TT_CODE_ACCESS] = "Instruction Access Error", 34 [TT_ILL_INSN] = "Illegal Instruction", 35 [TT_PRIV_INSN] = "Privileged Instruction", 36 [TT_NFPU_INSN] = "FPU Disabled", 37 [TT_FP_EXCP] = "FPU Exception", 38 [TT_TOVF] = "Tag Overflow", 39 [TT_CLRWIN] = "Clean Windows", 40 [TT_DIV_ZERO] = "Division By Zero", 41 [TT_DFAULT] = "Data Access Fault", 42 [TT_DMISS] = "Data Access MMU Miss", 43 [TT_DATA_ACCESS] = "Data Access Error", 44 [TT_DPROT] = "Data Protection Error", 45 [TT_UNALIGNED] = "Unaligned Memory Access", 46 [TT_PRIV_ACT] = "Privileged Action", 47 [TT_EXTINT | 0x1] = "External Interrupt 1", 48 [TT_EXTINT | 0x2] = "External Interrupt 2", 49 [TT_EXTINT | 0x3] = "External Interrupt 3", 50 [TT_EXTINT | 0x4] = "External Interrupt 4", 51 [TT_EXTINT | 0x5] = "External Interrupt 5", 52 [TT_EXTINT | 0x6] = "External Interrupt 6", 53 [TT_EXTINT | 0x7] = "External Interrupt 7", 54 [TT_EXTINT | 0x8] = "External Interrupt 8", 55 [TT_EXTINT | 0x9] = "External Interrupt 9", 56 [TT_EXTINT | 0xa] = "External Interrupt 10", 57 [TT_EXTINT | 0xb] = "External Interrupt 11", 58 [TT_EXTINT | 0xc] = "External Interrupt 12", 59 [TT_EXTINT | 0xd] = "External Interrupt 13", 60 [TT_EXTINT | 0xe] = "External Interrupt 14", 61 [TT_EXTINT | 0xf] = "External Interrupt 15", 62 }; 63 #endif 64 65 void cpu_check_irqs(CPUSPARCState *env) 66 { 67 CPUState *cs; 68 uint32_t pil = env->pil_in | 69 (env->softint & ~(SOFTINT_TIMER | SOFTINT_STIMER)); 70 71 /* We should be holding the BQL before we mess with IRQs */ 72 g_assert(bql_locked()); 73 74 /* TT_IVEC has a higher priority (16) than TT_EXTINT (31..17) */ 75 if (env->ivec_status & 0x20) { 76 return; 77 } 78 cs = env_cpu(env); 79 /* 80 * check if TM or SM in SOFTINT are set 81 * setting these also causes interrupt 14 82 */ 83 if (env->softint & (SOFTINT_TIMER | SOFTINT_STIMER)) { 84 pil |= 1 << 14; 85 } 86 87 /* 88 * The bit corresponding to psrpil is (1<< psrpil), 89 * the next bit is (2 << psrpil). 90 */ 91 if (pil < (2 << env->psrpil)) { 92 if (cs->interrupt_request & CPU_INTERRUPT_HARD) { 93 trace_sparc64_cpu_check_irqs_reset_irq(env->interrupt_index); 94 env->interrupt_index = 0; 95 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 96 } 97 return; 98 } 99 100 if (cpu_interrupts_enabled(env)) { 101 102 unsigned int i; 103 104 for (i = 15; i > env->psrpil; i--) { 105 if (pil & (1 << i)) { 106 int old_interrupt = env->interrupt_index; 107 int new_interrupt = TT_EXTINT | i; 108 109 if (unlikely(env->tl > 0 && cpu_tsptr(env)->tt > new_interrupt 110 && ((cpu_tsptr(env)->tt & 0x1f0) == TT_EXTINT))) { 111 trace_sparc64_cpu_check_irqs_noset_irq(env->tl, 112 cpu_tsptr(env)->tt, 113 new_interrupt); 114 } else if (old_interrupt != new_interrupt) { 115 env->interrupt_index = new_interrupt; 116 trace_sparc64_cpu_check_irqs_set_irq(i, old_interrupt, 117 new_interrupt); 118 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 119 } 120 break; 121 } 122 } 123 } else if (cs->interrupt_request & CPU_INTERRUPT_HARD) { 124 trace_sparc64_cpu_check_irqs_disabled(pil, env->pil_in, env->softint, 125 env->interrupt_index); 126 env->interrupt_index = 0; 127 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 128 } 129 } 130 131 void sparc_cpu_do_interrupt(CPUState *cs) 132 { 133 CPUSPARCState *env = cpu_env(cs); 134 int intno = cs->exception_index; 135 trap_state *tsptr; 136 137 #ifdef DEBUG_PCALL 138 if (qemu_loglevel_mask(CPU_LOG_INT)) { 139 static int count; 140 const char *name; 141 142 if (intno < 0 || intno >= 0x1ff) { 143 name = "Unknown"; 144 } else if (intno >= 0x180) { 145 name = "Hyperprivileged Trap Instruction"; 146 } else if (intno >= 0x100) { 147 name = "Trap Instruction"; 148 } else if (intno >= 0xc0) { 149 name = "Window Fill"; 150 } else if (intno >= 0x80) { 151 name = "Window Spill"; 152 } else { 153 name = excp_names[intno]; 154 if (!name) { 155 name = "Unknown"; 156 } 157 } 158 159 qemu_log("%6d: %s (v=%04x)\n", count, name, intno); 160 log_cpu_state(cs, 0); 161 #if 0 162 { 163 int i; 164 uint8_t *ptr; 165 166 qemu_log(" code="); 167 ptr = (uint8_t *)env->pc; 168 for (i = 0; i < 16; i++) { 169 qemu_log(" %02x", ldub(ptr + i)); 170 } 171 qemu_log("\n"); 172 } 173 #endif 174 count++; 175 } 176 #endif 177 #if !defined(CONFIG_USER_ONLY) 178 if (env->tl >= env->maxtl) { 179 cpu_abort(cs, "Trap 0x%04x while trap level (%d) >= MAXTL (%d)," 180 " Error state", cs->exception_index, env->tl, env->maxtl); 181 return; 182 } 183 #endif 184 if (env->tl < env->maxtl - 1) { 185 env->tl++; 186 } else { 187 env->pstate |= PS_RED; 188 if (env->tl < env->maxtl) { 189 env->tl++; 190 } 191 } 192 tsptr = cpu_tsptr(env); 193 194 tsptr->tstate = sparc64_tstate(env); 195 tsptr->tpc = env->pc; 196 tsptr->tnpc = env->npc; 197 tsptr->tt = intno; 198 199 if (cpu_has_hypervisor(env)) { 200 env->htstate[env->tl] = env->hpstate; 201 /* XXX OpenSPARC T1 - UltraSPARC T3 have MAXPTL=2 202 but this may change in the future */ 203 if (env->tl > 2) { 204 env->hpstate |= HS_PRIV; 205 } 206 } 207 208 if (env->def.features & CPU_FEATURE_GL) { 209 cpu_gl_switch_gregs(env, env->gl + 1); 210 env->gl++; 211 } 212 213 switch (intno) { 214 case TT_IVEC: 215 if (!cpu_has_hypervisor(env)) { 216 cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG); 217 } 218 break; 219 case TT_TFAULT: 220 case TT_DFAULT: 221 case TT_TMISS ... TT_TMISS + 3: 222 case TT_DMISS ... TT_DMISS + 3: 223 case TT_DPROT ... TT_DPROT + 3: 224 if (cpu_has_hypervisor(env)) { 225 env->hpstate |= HS_PRIV; 226 env->pstate = PS_PEF | PS_PRIV; 227 } else { 228 cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG); 229 } 230 break; 231 case TT_INSN_REAL_TRANSLATION_MISS ... TT_DATA_REAL_TRANSLATION_MISS: 232 case TT_HTRAP ... TT_HTRAP + 127: 233 env->hpstate |= HS_PRIV; 234 break; 235 default: 236 cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG); 237 break; 238 } 239 240 if (intno == TT_CLRWIN) { 241 cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1)); 242 } else if ((intno & 0x1c0) == TT_SPILL) { 243 cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2)); 244 } else if ((intno & 0x1c0) == TT_FILL) { 245 cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1)); 246 } 247 248 if (cpu_hypervisor_mode(env)) { 249 env->pc = (env->htba & ~0x3fffULL) | (intno << 5); 250 } else { 251 env->pc = env->tbr & ~0x7fffULL; 252 env->pc |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5); 253 } 254 env->npc = env->pc + 4; 255 cs->exception_index = -1; 256 } 257 258 trap_state *cpu_tsptr(CPUSPARCState* env) 259 { 260 return &env->ts[env->tl & MAXTL_MASK]; 261 } 262 263 static bool do_modify_softint(CPUSPARCState *env, uint32_t value) 264 { 265 if (env->softint != value) { 266 env->softint = value; 267 #if !defined(CONFIG_USER_ONLY) 268 if (cpu_interrupts_enabled(env)) { 269 bql_lock(); 270 cpu_check_irqs(env); 271 bql_unlock(); 272 } 273 #endif 274 return true; 275 } 276 return false; 277 } 278 279 void helper_set_softint(CPUSPARCState *env, uint64_t value) 280 { 281 if (do_modify_softint(env, env->softint | (uint32_t)value)) { 282 trace_int_helper_set_softint(env->softint); 283 } 284 } 285 286 void helper_clear_softint(CPUSPARCState *env, uint64_t value) 287 { 288 if (do_modify_softint(env, env->softint & (uint32_t)~value)) { 289 trace_int_helper_clear_softint(env->softint); 290 } 291 } 292 293 void helper_write_softint(CPUSPARCState *env, uint64_t value) 294 { 295 if (do_modify_softint(env, (uint32_t)value)) { 296 trace_int_helper_write_softint(env->softint); 297 } 298 } 299