| /* |
| * qemu user cpu loop |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu.h" |
| #include "cpu_loop-common.h" |
| |
| static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env) |
| { |
| return cpu_get_host_ticks(); |
| } |
| |
| uint64_t cpu_ppc_load_tbl(CPUPPCState *env) |
| { |
| return cpu_ppc_get_tb(env); |
| } |
| |
| uint32_t cpu_ppc_load_tbu(CPUPPCState *env) |
| { |
| return cpu_ppc_get_tb(env) >> 32; |
| } |
| |
| uint64_t cpu_ppc_load_atbl(CPUPPCState *env) |
| { |
| return cpu_ppc_get_tb(env); |
| } |
| |
| uint32_t cpu_ppc_load_atbu(CPUPPCState *env) |
| { |
| return cpu_ppc_get_tb(env) >> 32; |
| } |
| |
| uint32_t cpu_ppc601_load_rtcu(CPUPPCState *env) |
| __attribute__ (( alias ("cpu_ppc_load_tbu") )); |
| |
| uint32_t cpu_ppc601_load_rtcl(CPUPPCState *env) |
| { |
| return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
| } |
| |
| /* XXX: to be fixed */ |
| int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) |
| { |
| return -1; |
| } |
| |
| int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) |
| { |
| return -1; |
| } |
| |
| void cpu_loop(CPUPPCState *env) |
| { |
| CPUState *cs = CPU(ppc_env_get_cpu(env)); |
| target_siginfo_t info; |
| int trapnr, sig; |
| target_ulong ret; |
| |
| for(;;) { |
| bool arch_interrupt; |
| |
| cpu_exec_start(cs); |
| trapnr = cpu_exec(cs); |
| cpu_exec_end(cs); |
| process_queued_cpu_work(cs); |
| |
| arch_interrupt = true; |
| switch (trapnr) { |
| case POWERPC_EXCP_NONE: |
| /* Just go on */ |
| break; |
| case POWERPC_EXCP_CRITICAL: /* Critical input */ |
| cpu_abort(cs, "Critical interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_MCHECK: /* Machine check exception */ |
| cpu_abort(cs, "Machine check exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_DSI: /* Data storage exception */ |
| /* XXX: check this. Seems bugged */ |
| switch (env->error_code & 0xFF000000) { |
| case 0x40000000: |
| case 0x42000000: |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_MAPERR; |
| break; |
| case 0x04000000: |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| info.si_code = TARGET_ILL_ILLADR; |
| break; |
| case 0x08000000: |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_ACCERR; |
| break; |
| default: |
| /* Let's send a regular segfault... */ |
| EXCP_DUMP(env, "Invalid segfault errno (%02x)\n", |
| env->error_code); |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_MAPERR; |
| break; |
| } |
| info._sifields._sigfault._addr = env->spr[SPR_DAR]; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_ISI: /* Instruction storage exception */ |
| /* XXX: check this */ |
| switch (env->error_code & 0xFF000000) { |
| case 0x40000000: |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_MAPERR; |
| break; |
| case 0x10000000: |
| case 0x08000000: |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_ACCERR; |
| break; |
| default: |
| /* Let's send a regular segfault... */ |
| EXCP_DUMP(env, "Invalid segfault errno (%02x)\n", |
| env->error_code); |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_MAPERR; |
| break; |
| } |
| info._sifields._sigfault._addr = env->nip - 4; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_EXTERNAL: /* External input */ |
| cpu_abort(cs, "External interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_ALIGN: /* Alignment exception */ |
| /* XXX: check this */ |
| info.si_signo = TARGET_SIGBUS; |
| info.si_errno = 0; |
| info.si_code = TARGET_BUS_ADRALN; |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_PROGRAM: /* Program exception */ |
| case POWERPC_EXCP_HV_EMU: /* HV emulation */ |
| /* XXX: check this */ |
| switch (env->error_code & ~0xF) { |
| case POWERPC_EXCP_FP: |
| info.si_signo = TARGET_SIGFPE; |
| info.si_errno = 0; |
| switch (env->error_code & 0xF) { |
| case POWERPC_EXCP_FP_OX: |
| info.si_code = TARGET_FPE_FLTOVF; |
| break; |
| case POWERPC_EXCP_FP_UX: |
| info.si_code = TARGET_FPE_FLTUND; |
| break; |
| case POWERPC_EXCP_FP_ZX: |
| case POWERPC_EXCP_FP_VXZDZ: |
| info.si_code = TARGET_FPE_FLTDIV; |
| break; |
| case POWERPC_EXCP_FP_XX: |
| info.si_code = TARGET_FPE_FLTRES; |
| break; |
| case POWERPC_EXCP_FP_VXSOFT: |
| info.si_code = TARGET_FPE_FLTINV; |
| break; |
| case POWERPC_EXCP_FP_VXSNAN: |
| case POWERPC_EXCP_FP_VXISI: |
| case POWERPC_EXCP_FP_VXIDI: |
| case POWERPC_EXCP_FP_VXIMZ: |
| case POWERPC_EXCP_FP_VXVC: |
| case POWERPC_EXCP_FP_VXSQRT: |
| case POWERPC_EXCP_FP_VXCVI: |
| info.si_code = TARGET_FPE_FLTSUB; |
| break; |
| default: |
| EXCP_DUMP(env, "Unknown floating point exception (%02x)\n", |
| env->error_code); |
| break; |
| } |
| break; |
| case POWERPC_EXCP_INVAL: |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| switch (env->error_code & 0xF) { |
| case POWERPC_EXCP_INVAL_INVAL: |
| info.si_code = TARGET_ILL_ILLOPC; |
| break; |
| case POWERPC_EXCP_INVAL_LSWX: |
| info.si_code = TARGET_ILL_ILLOPN; |
| break; |
| case POWERPC_EXCP_INVAL_SPR: |
| info.si_code = TARGET_ILL_PRVREG; |
| break; |
| case POWERPC_EXCP_INVAL_FP: |
| info.si_code = TARGET_ILL_COPROC; |
| break; |
| default: |
| EXCP_DUMP(env, "Unknown invalid operation (%02x)\n", |
| env->error_code & 0xF); |
| info.si_code = TARGET_ILL_ILLADR; |
| break; |
| } |
| break; |
| case POWERPC_EXCP_PRIV: |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| switch (env->error_code & 0xF) { |
| case POWERPC_EXCP_PRIV_OPC: |
| info.si_code = TARGET_ILL_PRVOPC; |
| break; |
| case POWERPC_EXCP_PRIV_REG: |
| info.si_code = TARGET_ILL_PRVREG; |
| break; |
| default: |
| EXCP_DUMP(env, "Unknown privilege violation (%02x)\n", |
| env->error_code & 0xF); |
| info.si_code = TARGET_ILL_PRVOPC; |
| break; |
| } |
| break; |
| case POWERPC_EXCP_TRAP: |
| cpu_abort(cs, "Tried to call a TRAP\n"); |
| break; |
| default: |
| /* Should not happen ! */ |
| cpu_abort(cs, "Unknown program exception (%02x)\n", |
| env->error_code); |
| break; |
| } |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| info.si_code = TARGET_ILL_COPROC; |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_SYSCALL: /* System call exception */ |
| cpu_abort(cs, "Syscall exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| info.si_code = TARGET_ILL_COPROC; |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_DECR: /* Decrementer exception */ |
| cpu_abort(cs, "Decrementer interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ |
| cpu_abort(cs, "Fix interval timer interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ |
| cpu_abort(cs, "Watchdog timer interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_DTLB: /* Data TLB error */ |
| cpu_abort(cs, "Data TLB exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_ITLB: /* Instruction TLB error */ |
| cpu_abort(cs, "Instruction TLB exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| info.si_code = TARGET_ILL_COPROC; |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ |
| cpu_abort(cs, "Embedded floating-point data IRQ not handled\n"); |
| break; |
| case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ |
| cpu_abort(cs, "Embedded floating-point round IRQ not handled\n"); |
| break; |
| case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ |
| cpu_abort(cs, "Performance monitor exception not handled\n"); |
| break; |
| case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ |
| cpu_abort(cs, "Doorbell interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ |
| cpu_abort(cs, "Doorbell critical interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_RESET: /* System reset exception */ |
| cpu_abort(cs, "Reset interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_DSEG: /* Data segment exception */ |
| cpu_abort(cs, "Data segment exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_ISEG: /* Instruction segment exception */ |
| cpu_abort(cs, "Instruction segment exception " |
| "while in user mode. Aborting\n"); |
| break; |
| /* PowerPC 64 with hypervisor mode support */ |
| case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ |
| cpu_abort(cs, "Hypervisor decrementer interrupt " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_TRACE: /* Trace exception */ |
| /* Nothing to do: |
| * we use this exception to emulate step-by-step execution mode. |
| */ |
| break; |
| /* PowerPC 64 with hypervisor mode support */ |
| case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ |
| cpu_abort(cs, "Hypervisor data storage exception " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ |
| cpu_abort(cs, "Hypervisor instruction storage exception " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ |
| cpu_abort(cs, "Hypervisor data segment exception " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ |
| cpu_abort(cs, "Hypervisor instruction segment exception " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_VPU: /* Vector unavailable exception */ |
| info.si_signo = TARGET_SIGILL; |
| info.si_errno = 0; |
| info.si_code = TARGET_ILL_COPROC; |
| info._sifields._sigfault._addr = env->nip; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ |
| cpu_abort(cs, "Programmable interval timer interrupt " |
| "while in user mode. Aborting\n"); |
| break; |
| case POWERPC_EXCP_IO: /* IO error exception */ |
| cpu_abort(cs, "IO error exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_RUNM: /* Run mode exception */ |
| cpu_abort(cs, "Run mode exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_EMUL: /* Emulation trap exception */ |
| cpu_abort(cs, "Emulation trap exception not handled\n"); |
| break; |
| case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ |
| cpu_abort(cs, "Instruction fetch TLB exception " |
| "while in user-mode. Aborting"); |
| break; |
| case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ |
| cpu_abort(cs, "Data load TLB exception while in user-mode. " |
| "Aborting"); |
| break; |
| case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ |
| cpu_abort(cs, "Data store TLB exception while in user-mode. " |
| "Aborting"); |
| break; |
| case POWERPC_EXCP_FPA: /* Floating-point assist exception */ |
| cpu_abort(cs, "Floating-point assist exception not handled\n"); |
| break; |
| case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ |
| cpu_abort(cs, "Instruction address breakpoint exception " |
| "not handled\n"); |
| break; |
| case POWERPC_EXCP_SMI: /* System management interrupt */ |
| cpu_abort(cs, "System management interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_THERM: /* Thermal interrupt */ |
| cpu_abort(cs, "Thermal interrupt interrupt while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ |
| cpu_abort(cs, "Performance monitor exception not handled\n"); |
| break; |
| case POWERPC_EXCP_VPUA: /* Vector assist exception */ |
| cpu_abort(cs, "Vector assist exception not handled\n"); |
| break; |
| case POWERPC_EXCP_SOFTP: /* Soft patch exception */ |
| cpu_abort(cs, "Soft patch exception not handled\n"); |
| break; |
| case POWERPC_EXCP_MAINT: /* Maintenance exception */ |
| cpu_abort(cs, "Maintenance exception while in user mode. " |
| "Aborting\n"); |
| break; |
| case POWERPC_EXCP_STOP: /* stop translation */ |
| /* We did invalidate the instruction cache. Go on */ |
| break; |
| case POWERPC_EXCP_BRANCH: /* branch instruction: */ |
| /* We just stopped because of a branch. Go on */ |
| break; |
| case POWERPC_EXCP_SYSCALL_USER: |
| /* system call in user-mode emulation */ |
| /* WARNING: |
| * PPC ABI uses overflow flag in cr0 to signal an error |
| * in syscalls. |
| */ |
| env->crf[0] &= ~0x1; |
| env->nip += 4; |
| ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
| env->gpr[5], env->gpr[6], env->gpr[7], |
| env->gpr[8], 0, 0); |
| if (ret == -TARGET_ERESTARTSYS) { |
| env->nip -= 4; |
| break; |
| } |
| if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) { |
| /* Returning from a successful sigreturn syscall. |
| Avoid corrupting register state. */ |
| break; |
| } |
| if (ret > (target_ulong)(-515)) { |
| env->crf[0] |= 0x1; |
| ret = -ret; |
| } |
| env->gpr[3] = ret; |
| break; |
| case EXCP_DEBUG: |
| sig = gdb_handlesig(cs, TARGET_SIGTRAP); |
| if (sig) { |
| info.si_signo = sig; |
| info.si_errno = 0; |
| info.si_code = TARGET_TRAP_BRKPT; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| } else { |
| arch_interrupt = false; |
| } |
| break; |
| case EXCP_INTERRUPT: |
| /* just indicate that signals should be handled asap */ |
| break; |
| case EXCP_ATOMIC: |
| cpu_exec_step_atomic(cs); |
| arch_interrupt = false; |
| break; |
| default: |
| cpu_abort(cs, "Unknown exception 0x%x. Aborting\n", trapnr); |
| break; |
| } |
| process_pending_signals(env); |
| |
| /* Most of the traps imply a transition through kernel mode, |
| * which implies an REI instruction has been executed. Which |
| * means that RX and LOCK_ADDR should be cleared. But there |
| * are a few exceptions for traps internal to QEMU. |
| */ |
| if (arch_interrupt) { |
| env->reserve_addr = -1; |
| } |
| } |
| } |
| |
| void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
| { |
| int i; |
| |
| #if defined(TARGET_PPC64) |
| int flag = (env->insns_flags2 & PPC2_BOOKE206) ? MSR_CM : MSR_SF; |
| #if defined(TARGET_ABI32) |
| env->msr &= ~((target_ulong)1 << flag); |
| #else |
| env->msr |= (target_ulong)1 << flag; |
| #endif |
| #endif |
| env->nip = regs->nip; |
| for(i = 0; i < 32; i++) { |
| env->gpr[i] = regs->gpr[i]; |
| } |
| } |
