308 lines
8.4 KiB
C
308 lines
8.4 KiB
C
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/*
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* QEMU Motorola 68k CPU
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*
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* Copyright (c) 2012 SUSE LINUX Products GmbH
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/lgpl-2.1.html>
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "fpu/softfloat.h"
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#include "exec/exec-all.h"
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static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
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{
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M68kCPU *cpu = M68K_CPU(cs);
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cpu->env.pc = value;
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}
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static bool m68k_cpu_has_work(CPUState *cs)
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{
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return cs->interrupt_request & CPU_INTERRUPT_HARD;
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}
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static void m68k_set_feature(CPUM68KState *env, int feature)
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{
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env->features |= (1u << feature);
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}
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static void m68k_cpu_reset(CPUState *dev)
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{
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CPUState *s = CPU(dev);
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M68kCPU *cpu = M68K_CPU(s);
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M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
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CPUM68KState *env = &cpu->env;
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floatx80 nan = floatx80_default_nan(NULL);
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int i;
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mcc->parent_reset(dev);
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memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
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cpu_m68k_set_sr(env, SR_S | SR_I);
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for (i = 0; i < 8; i++) {
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env->fregs[i].d = nan;
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}
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cpu_m68k_set_fpcr(env, 0);
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env->fpsr = 0;
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/* TODO: We should set PC from the interrupt vector. */
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env->pc = 0;
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}
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/* CPU models */
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static void m5206_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
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}
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static void m68000_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_M68000);
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m68k_set_feature(env, M68K_FEATURE_USP);
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m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
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m68k_set_feature(env, M68K_FEATURE_MOVEP);
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}
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/* common features for 68020, 68030 and 68040 */
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static void m680x0_cpu_common(CPUM68KState *env)
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{
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m68k_set_feature(env, M68K_FEATURE_M68000);
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m68k_set_feature(env, M68K_FEATURE_USP);
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m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
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m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
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m68k_set_feature(env, M68K_FEATURE_BRAL);
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m68k_set_feature(env, M68K_FEATURE_BCCL);
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m68k_set_feature(env, M68K_FEATURE_BITFIELD);
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m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
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m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
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m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
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m68k_set_feature(env, M68K_FEATURE_FPU);
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m68k_set_feature(env, M68K_FEATURE_CAS);
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m68k_set_feature(env, M68K_FEATURE_BKPT);
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m68k_set_feature(env, M68K_FEATURE_RTD);
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m68k_set_feature(env, M68K_FEATURE_CHK2);
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m68k_set_feature(env, M68K_FEATURE_MOVEP);
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}
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static void m68020_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m680x0_cpu_common(env);
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m68k_set_feature(env, M68K_FEATURE_M68020);
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}
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static void m68030_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m680x0_cpu_common(env);
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m68k_set_feature(env, M68K_FEATURE_M68030);
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}
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static void m68040_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m680x0_cpu_common(env);
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m68k_set_feature(env, M68K_FEATURE_M68040);
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}
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static void m68060_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_M68000);
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m68k_set_feature(env, M68K_FEATURE_USP);
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m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
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m68k_set_feature(env, M68K_FEATURE_BRAL);
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m68k_set_feature(env, M68K_FEATURE_BCCL);
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m68k_set_feature(env, M68K_FEATURE_BITFIELD);
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m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
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m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
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m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
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m68k_set_feature(env, M68K_FEATURE_FPU);
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m68k_set_feature(env, M68K_FEATURE_CAS);
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m68k_set_feature(env, M68K_FEATURE_BKPT);
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m68k_set_feature(env, M68K_FEATURE_RTD);
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m68k_set_feature(env, M68K_FEATURE_CHK2);
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m68k_set_feature(env, M68K_FEATURE_M68060);
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}
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static void m5208_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
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m68k_set_feature(env, M68K_FEATURE_BRAL);
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m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
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m68k_set_feature(env, M68K_FEATURE_USP);
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}
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static void cfv4e_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
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m68k_set_feature(env, M68K_FEATURE_BRAL);
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m68k_set_feature(env, M68K_FEATURE_CF_FPU);
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m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
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m68k_set_feature(env, M68K_FEATURE_USP);
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}
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static void any_cpu_initfn(CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
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m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
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m68k_set_feature(env, M68K_FEATURE_BRAL);
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m68k_set_feature(env, M68K_FEATURE_CF_FPU);
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/*
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* MAC and EMAC are mututally exclusive, so pick EMAC.
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* It's mostly backwards compatible.
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*/
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m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
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m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
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m68k_set_feature(env, M68K_FEATURE_USP);
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m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
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m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
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}
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static void m68k_cpu_realizefn(CPUState *dev)
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{
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CPUState *cs = CPU(dev);
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M68kCPU *cpu = M68K_CPU(dev);
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register_m68k_insns(&cpu->env);
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cpu_exec_realizefn(cs);
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}
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static void m68k_cpu_initfn(struct uc_struct *uc, CPUState *obj)
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{
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M68kCPU *cpu = M68K_CPU(obj);
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CPUM68KState *env = &cpu->env;
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env->uc = uc;
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cpu_set_cpustate_pointers(cpu);
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}
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static void m68k_cpu_class_init(CPUClass *c)
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{
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M68kCPUClass *mcc = M68K_CPU_CLASS(c);
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CPUClass *cc = CPU_CLASS(c);
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/* parent class is CPUClass, parent_reset() is cpu_common_reset(). */
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mcc->parent_reset = cc->reset;
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/* overwrite the CPUClass->reset to arch reset: x86_cpu_reset(). */
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cc->reset = m68k_cpu_reset;
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cc->has_work = m68k_cpu_has_work;
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cc->do_interrupt = m68k_cpu_do_interrupt;
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cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
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cc->set_pc = m68k_cpu_set_pc;
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cc->tlb_fill = m68k_cpu_tlb_fill;
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cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
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cc->tcg_initialize = m68k_tcg_init;
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}
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#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
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{ \
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.name = cpu_model, \
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.initfn = initfn, \
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}
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struct M68kCPUInfo {
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const char *name;
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void (*initfn)(CPUState *obj);
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};
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static struct M68kCPUInfo m68k_cpus_type_infos[] = {
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{ "m68000", m68000_cpu_initfn },
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{ "m68020", m68020_cpu_initfn },
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{ "m68030", m68030_cpu_initfn },
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{ "m68040", m68040_cpu_initfn },
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{ "m68060", m68060_cpu_initfn },
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{ "m5206", m5206_cpu_initfn },
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{ "m5208", m5208_cpu_initfn },
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{ "cfv4e", cfv4e_cpu_initfn },
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{ "any", any_cpu_initfn },
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};
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M68kCPU *cpu_m68k_init(struct uc_struct *uc, const char *cpu_model)
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{
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M68kCPU *cpu;
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CPUState *cs;
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CPUClass *cc;
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int i;
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if (cpu_model == NULL) {
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cpu_model = "cfv4e";
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}
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cpu = calloc(1, sizeof(*cpu));
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if (cpu == NULL) {
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return NULL;
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}
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cs = (CPUState *)cpu;
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cc = (CPUClass *)&cpu->cc;
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cs->cc = cc;
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cs->uc = uc;
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uc->cpu = cs;
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cpu_class_init(uc, cc);
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m68k_cpu_class_init(cc);
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cpu_common_initfn(uc, cs);
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m68k_cpu_initfn(uc, cs);
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for (i = 0; i < ARRAY_SIZE(m68k_cpus_type_infos); i++) {
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if (strcasecmp(cpu_model, m68k_cpus_type_infos[i].name) == 0) {
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m68k_cpus_type_infos[i].initfn(cs);
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break;
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}
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}
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m68k_cpu_realizefn(cs);
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// init address space
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cpu_address_space_init(cs, 0, cs->memory);
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qemu_init_vcpu(cs);
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return cpu;
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}
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