1 /* 2 * Sparc32 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 "trace.h" 24 #include "exec/log.h" 25 #include "sysemu/runstate.h" 26 27 28 static const char * const excp_names[0x80] = { 29 [TT_TFAULT] = "Instruction Access Fault", 30 [TT_ILL_INSN] = "Illegal Instruction", 31 [TT_PRIV_INSN] = "Privileged Instruction", 32 [TT_NFPU_INSN] = "FPU Disabled", 33 [TT_WIN_OVF] = "Window Overflow", 34 [TT_WIN_UNF] = "Window Underflow", 35 [TT_UNALIGNED] = "Unaligned Memory Access", 36 [TT_FP_EXCP] = "FPU Exception", 37 [TT_DFAULT] = "Data Access Fault", 38 [TT_TOVF] = "Tag Overflow", 39 [TT_EXTINT | 0x1] = "External Interrupt 1", 40 [TT_EXTINT | 0x2] = "External Interrupt 2", 41 [TT_EXTINT | 0x3] = "External Interrupt 3", 42 [TT_EXTINT | 0x4] = "External Interrupt 4", 43 [TT_EXTINT | 0x5] = "External Interrupt 5", 44 [TT_EXTINT | 0x6] = "External Interrupt 6", 45 [TT_EXTINT | 0x7] = "External Interrupt 7", 46 [TT_EXTINT | 0x8] = "External Interrupt 8", 47 [TT_EXTINT | 0x9] = "External Interrupt 9", 48 [TT_EXTINT | 0xa] = "External Interrupt 10", 49 [TT_EXTINT | 0xb] = "External Interrupt 11", 50 [TT_EXTINT | 0xc] = "External Interrupt 12", 51 [TT_EXTINT | 0xd] = "External Interrupt 13", 52 [TT_EXTINT | 0xe] = "External Interrupt 14", 53 [TT_EXTINT | 0xf] = "External Interrupt 15", 54 [TT_CODE_ACCESS] = "Instruction Access Error", 55 [TT_DATA_ACCESS] = "Data Access Error", 56 [TT_DIV_ZERO] = "Division By Zero", 57 [TT_NCP_INSN] = "Coprocessor Disabled", 58 }; 59 60 static const char *excp_name_str(int32_t exception_index) 61 { 62 if (exception_index < 0 || exception_index >= ARRAY_SIZE(excp_names)) { 63 return "Unknown"; 64 } 65 return excp_names[exception_index]; 66 } 67 68 void cpu_check_irqs(CPUSPARCState *env) 69 { 70 CPUState *cs; 71 72 /* We should be holding the BQL before we mess with IRQs */ 73 g_assert(bql_locked()); 74 75 if (env->pil_in && (env->interrupt_index == 0 || 76 (env->interrupt_index & ~15) == TT_EXTINT)) { 77 unsigned int i; 78 79 for (i = 15; i > 0; i--) { 80 if (env->pil_in & (1 << i)) { 81 int old_interrupt = env->interrupt_index; 82 83 env->interrupt_index = TT_EXTINT | i; 84 if (old_interrupt != env->interrupt_index) { 85 cs = env_cpu(env); 86 trace_sun4m_cpu_interrupt(i); 87 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 88 } 89 break; 90 } 91 } 92 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) { 93 cs = env_cpu(env); 94 trace_sun4m_cpu_reset_interrupt(env->interrupt_index & 15); 95 env->interrupt_index = 0; 96 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 97 } 98 } 99 100 void sparc_cpu_do_interrupt(CPUState *cs) 101 { 102 CPUSPARCState *env = cpu_env(cs); 103 int cwp, intno = cs->exception_index; 104 105 if (qemu_loglevel_mask(CPU_LOG_INT)) { 106 static int count; 107 const char *name; 108 109 if (intno < 0 || intno >= 0x100) { 110 name = "Unknown"; 111 } else if (intno >= 0x80) { 112 name = "Trap Instruction"; 113 } else { 114 name = excp_name_str(intno); 115 } 116 117 qemu_log("%6d: %s (v=%02x)\n", count, name, intno); 118 log_cpu_state(cs, 0); 119 #if 0 120 { 121 int i; 122 uint8_t *ptr; 123 124 qemu_log(" code="); 125 ptr = (uint8_t *)env->pc; 126 for (i = 0; i < 16; i++) { 127 qemu_log(" %02x", ldub(ptr + i)); 128 } 129 qemu_log("\n"); 130 } 131 #endif 132 count++; 133 } 134 #if !defined(CONFIG_USER_ONLY) 135 if (env->psret == 0) { 136 if (cs->exception_index == 0x80 && 137 env->def.features & CPU_FEATURE_TA0_SHUTDOWN) { 138 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 139 } else { 140 cpu_abort(cs, "Trap 0x%02x (%s) while interrupts disabled, " 141 "Error state", 142 cs->exception_index, excp_name_str(cs->exception_index)); 143 } 144 return; 145 } 146 #endif 147 env->psret = 0; 148 cwp = cpu_cwp_dec(env, env->cwp - 1); 149 cpu_set_cwp(env, cwp); 150 env->regwptr[9] = env->pc; 151 env->regwptr[10] = env->npc; 152 env->psrps = env->psrs; 153 env->psrs = 1; 154 env->tbr = (env->tbr & TBR_BASE_MASK) | (intno << 4); 155 env->pc = env->tbr; 156 env->npc = env->pc + 4; 157 cs->exception_index = -1; 158 159 #if !defined(CONFIG_USER_ONLY) 160 /* IRQ acknowledgment */ 161 if ((intno & ~15) == TT_EXTINT && env->qemu_irq_ack != NULL) { 162 env->qemu_irq_ack(env, intno); 163 } 164 #endif 165 } 166