/* * Sparc64 interrupt helpers * * Copyright (c) 2003-2005 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #include "cpu.h" #include "exec/helper-proto.h" #include "trace.h" #define DEBUG_PCALL #ifdef DEBUG_PCALL static const char * const excp_names[0x80] = { [TT_TFAULT] = "Instruction Access Fault", [TT_TMISS] = "Instruction Access MMU Miss", [TT_CODE_ACCESS] = "Instruction Access Error", [TT_ILL_INSN] = "Illegal Instruction", [TT_PRIV_INSN] = "Privileged Instruction", [TT_NFPU_INSN] = "FPU Disabled", [TT_FP_EXCP] = "FPU Exception", [TT_TOVF] = "Tag Overflow", [TT_CLRWIN] = "Clean Windows", [TT_DIV_ZERO] = "Division By Zero", [TT_DFAULT] = "Data Access Fault", [TT_DMISS] = "Data Access MMU Miss", [TT_DATA_ACCESS] = "Data Access Error", [TT_DPROT] = "Data Protection Error", [TT_UNALIGNED] = "Unaligned Memory Access", [TT_PRIV_ACT] = "Privileged Action", [TT_EXTINT | 0x1] = "External Interrupt 1", [TT_EXTINT | 0x2] = "External Interrupt 2", [TT_EXTINT | 0x3] = "External Interrupt 3", [TT_EXTINT | 0x4] = "External Interrupt 4", [TT_EXTINT | 0x5] = "External Interrupt 5", [TT_EXTINT | 0x6] = "External Interrupt 6", [TT_EXTINT | 0x7] = "External Interrupt 7", [TT_EXTINT | 0x8] = "External Interrupt 8", [TT_EXTINT | 0x9] = "External Interrupt 9", [TT_EXTINT | 0xa] = "External Interrupt 10", [TT_EXTINT | 0xb] = "External Interrupt 11", [TT_EXTINT | 0xc] = "External Interrupt 12", [TT_EXTINT | 0xd] = "External Interrupt 13", [TT_EXTINT | 0xe] = "External Interrupt 14", [TT_EXTINT | 0xf] = "External Interrupt 15", }; #endif void sparc_cpu_do_interrupt(CPUState *cs) { SPARCCPU *cpu = SPARC_CPU(cs); CPUSPARCState *env = &cpu->env; int intno = cs->exception_index; trap_state *tsptr; /* Compute PSR before exposing state. */ if (env->cc_op != CC_OP_FLAGS) { cpu_get_psr(env); } #ifdef DEBUG_PCALL if (qemu_loglevel_mask(CPU_LOG_INT)) { static int count; const char *name; if (intno < 0 || intno >= 0x180) { name = "Unknown"; } else if (intno >= 0x100) { name = "Trap Instruction"; } else if (intno >= 0xc0) { name = "Window Fill"; } else if (intno >= 0x80) { name = "Window Spill"; } else { name = excp_names[intno]; if (!name) { name = "Unknown"; } } qemu_log("%6d: %s (v=%04x)\n", count, name, intno); log_cpu_state(cs, 0); #if 0 { int i; uint8_t *ptr; qemu_log(" code="); ptr = (uint8_t *)env->pc; for (i = 0; i < 16; i++) { qemu_log(" %02x", ldub(ptr + i)); } qemu_log("\n"); } #endif count++; } #endif #if !defined(CONFIG_USER_ONLY) if (env->tl >= env->maxtl) { cpu_abort(cs, "Trap 0x%04x while trap level (%d) >= MAXTL (%d)," " Error state", cs->exception_index, env->tl, env->maxtl); return; } #endif if (env->tl < env->maxtl - 1) { env->tl++; } else { env->pstate |= PS_RED; if (env->tl < env->maxtl) { env->tl++; } } tsptr = cpu_tsptr(env); tsptr->tstate = (cpu_get_ccr(env) << 32) | ((env->asi & 0xff) << 24) | ((env->pstate & 0xf3f) << 8) | cpu_get_cwp64(env); tsptr->tpc = env->pc; tsptr->tnpc = env->npc; tsptr->tt = intno; switch (intno) { case TT_IVEC: cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG); break; case TT_TFAULT: case TT_DFAULT: case TT_TMISS ... TT_TMISS + 3: case TT_DMISS ... TT_DMISS + 3: case TT_DPROT ... TT_DPROT + 3: cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG); break; default: cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG); break; } if (intno == TT_CLRWIN) { cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1)); } else if ((intno & 0x1c0) == TT_SPILL) { cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2)); } else if ((intno & 0x1c0) == TT_FILL) { cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1)); } env->tbr &= ~0x7fffULL; env->tbr |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5); env->pc = env->tbr; env->npc = env->pc + 4; cs->exception_index = -1; } trap_state *cpu_tsptr(CPUSPARCState* env) { return &env->ts[env->tl & MAXTL_MASK]; } static bool do_modify_softint(CPUSPARCState *env, uint32_t value) { if (env->softint != value) { env->softint = value; #if !defined(CONFIG_USER_ONLY) if (cpu_interrupts_enabled(env)) { cpu_check_irqs(env); } #endif return true; } return false; } void helper_set_softint(CPUSPARCState *env, uint64_t value) { if (do_modify_softint(env, env->softint | (uint32_t)value)) { trace_int_helper_set_softint(env->softint); } } void helper_clear_softint(CPUSPARCState *env, uint64_t value) { if (do_modify_softint(env, env->softint & (uint32_t)~value)) { trace_int_helper_clear_softint(env->softint); } } void helper_write_softint(CPUSPARCState *env, uint64_t value) { if (do_modify_softint(env, (uint32_t)value)) { trace_int_helper_write_softint(env->softint); } }