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dpavlin |
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/* |
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* PearPC |
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* ppc_exc.cc |
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* |
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* Copyright (C) 2003 Sebastian Biallas (sb@biallas.net) |
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* Copyright (C) 2004 Daniel Foesch (dfoesch@cs.nmsu.edu) |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "tools/snprintf.h" |
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#include "debug/tracers.h" |
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#include "info.h" |
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#include "ppc_cpu.h" |
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#include "ppc_exc.h" |
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#include "ppc_mmu.h" |
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/* |
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* .247 |
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*/ |
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bool FASTCALL ppc_exception(uint32 type, uint32 flags, uint32 a) |
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{ |
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if (type != PPC_EXC_DEC) PPC_EXC_TRACE("@%08x: type = %08x (%08x, %08x)\n", gCPU.pc, type, flags, a); |
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switch (type) { |
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case PPC_EXC_DSI: { // .271 |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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gCPU.dar = a; |
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gCPU.dsisr = flags; |
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break; |
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} |
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case PPC_EXC_ISI: { // .274 |
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if (gCPU.pc == 0) { |
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PPC_EXC_WARN("pc == 0 in ISI\n"); |
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SINGLESTEP(""); |
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} |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = (gCPU.msr & 0x87c0ffff) | flags; |
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break; |
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} |
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case PPC_EXC_DEC: { // .284 |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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case PPC_EXC_EXT_INT: { |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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case PPC_EXC_SC: { // .285 |
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gCPU.srr[0] = gCPU.npc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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case PPC_EXC_NO_FPU: { // .284 |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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case PPC_EXC_NO_VEC: { |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x0000ff73; |
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break; |
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} |
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case PPC_EXC_PROGRAM: { // .283 |
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if (flags & PPC_EXC_PROGRAM_NEXT) { |
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gCPU.srr[0] = gCPU.npc; |
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} else { |
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gCPU.srr[0] = gCPU.pc; |
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} |
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gCPU.srr[1] = (gCPU.msr & 0x87c0ffff) | flags; |
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break; |
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} |
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case PPC_EXC_FLOAT_ASSIST: { // .288 |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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case PPC_EXC_MACHINE_CHECK: { // .270 |
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if (!(gCPU.msr & MSR_ME)) { |
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PPC_EXC_ERR("machine check exception and MSR[ME]=0.\n"); |
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} |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = (gCPU.msr & 0x87c0ffff) | MSR_RI; |
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break; |
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} |
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case PPC_EXC_TRACE2: { // .286 |
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gCPU.srr[0] = gCPU.pc; |
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gCPU.srr[1] = gCPU.msr & 0x87c0ffff; |
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break; |
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} |
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default: |
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PPC_EXC_ERR("unknown\n"); |
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return false; |
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} |
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ppc_mmu_tlb_invalidate(); |
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gCPU.msr = 0; |
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gCPU.npc = type; |
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return true; |
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} |
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void ppc_cpu_raise_ext_exception() |
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{ |
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ppc_cpu_atomic_raise_ext_exception(); |
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} |
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void ppc_cpu_cancel_ext_exception() |
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{ |
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ppc_cpu_atomic_cancel_ext_exception(); |
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} |
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