aboutsummaryrefslogtreecommitdiffstats
path: root/target-m68k/cpu.c
diff options
context:
space:
mode:
Diffstat (limited to 'target-m68k/cpu.c')
-rw-r--r--target-m68k/cpu.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/target-m68k/cpu.c b/target-m68k/cpu.c
new file mode 100644
index 00000000..97527ef3
--- /dev/null
+++ b/target-m68k/cpu.c
@@ -0,0 +1,256 @@
+/*
+ * QEMU Motorola 68k CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * 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 2.1 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/lgpl-2.1.html>
+ */
+
+#include "cpu.h"
+#include "qemu-common.h"
+#include "migration/vmstate.h"
+
+
+static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+
+ cpu->env.pc = value;
+}
+
+static bool m68k_cpu_has_work(CPUState *cs)
+{
+ return cs->interrupt_request & CPU_INTERRUPT_HARD;
+}
+
+static void m68k_set_feature(CPUM68KState *env, int feature)
+{
+ env->features |= (1u << feature);
+}
+
+/* CPUClass::reset() */
+static void m68k_cpu_reset(CPUState *s)
+{
+ M68kCPU *cpu = M68K_CPU(s);
+ M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ mcc->parent_reset(s);
+
+ memset(env, 0, offsetof(CPUM68KState, features));
+#if !defined(CONFIG_USER_ONLY)
+ env->sr = 0x2700;
+#endif
+ m68k_switch_sp(env);
+ /* ??? FP regs should be initialized to NaN. */
+ env->cc_op = CC_OP_FLAGS;
+ /* TODO: We should set PC from the interrupt vector. */
+ env->pc = 0;
+ tlb_flush(s, 1);
+}
+
+/* CPU models */
+
+static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
+{
+ ObjectClass *oc;
+ char *typename;
+
+ if (cpu_model == NULL) {
+ return NULL;
+ }
+
+ typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
+ oc = object_class_by_name(typename);
+ g_free(typename);
+ if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
+ object_class_is_abstract(oc))) {
+ return NULL;
+ }
+ return oc;
+}
+
+static void m5206_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+}
+
+static void m5208_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+}
+
+static void cfv4e_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_FPU);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+}
+
+static void any_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_FPU);
+ /* MAC and EMAC are mututally exclusive, so pick EMAC.
+ It's mostly backwards compatible. */
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+ m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
+ m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
+}
+
+typedef struct M68kCPUInfo {
+ const char *name;
+ void (*instance_init)(Object *obj);
+} M68kCPUInfo;
+
+static const M68kCPUInfo m68k_cpus[] = {
+ { .name = "m5206", .instance_init = m5206_cpu_initfn },
+ { .name = "m5208", .instance_init = m5208_cpu_initfn },
+ { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
+ { .name = "any", .instance_init = any_cpu_initfn },
+};
+
+static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+ CPUState *cs = CPU(dev);
+ M68kCPU *cpu = M68K_CPU(dev);
+ M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
+
+ m68k_cpu_init_gdb(cpu);
+
+ cpu_reset(cs);
+ qemu_init_vcpu(cs);
+
+ mcc->parent_realize(dev, errp);
+}
+
+static void m68k_cpu_initfn(Object *obj)
+{
+ CPUState *cs = CPU(obj);
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+ static bool inited;
+
+ cs->env_ptr = env;
+ cpu_exec_init(cs, &error_abort);
+
+ if (tcg_enabled() && !inited) {
+ inited = true;
+ m68k_tcg_init();
+ }
+}
+
+static const VMStateDescription vmstate_m68k_cpu = {
+ .name = "cpu",
+ .unmigratable = 1,
+};
+
+static void m68k_cpu_class_init(ObjectClass *c, void *data)
+{
+ M68kCPUClass *mcc = M68K_CPU_CLASS(c);
+ CPUClass *cc = CPU_CLASS(c);
+ DeviceClass *dc = DEVICE_CLASS(c);
+
+ mcc->parent_realize = dc->realize;
+ dc->realize = m68k_cpu_realizefn;
+
+ mcc->parent_reset = cc->reset;
+ cc->reset = m68k_cpu_reset;
+
+ cc->class_by_name = m68k_cpu_class_by_name;
+ cc->has_work = m68k_cpu_has_work;
+ cc->do_interrupt = m68k_cpu_do_interrupt;
+ cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
+ cc->dump_state = m68k_cpu_dump_state;
+ cc->set_pc = m68k_cpu_set_pc;
+ cc->gdb_read_register = m68k_cpu_gdb_read_register;
+ cc->gdb_write_register = m68k_cpu_gdb_write_register;
+#ifdef CONFIG_USER_ONLY
+ cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
+#else
+ cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
+#endif
+ cc->cpu_exec_enter = m68k_cpu_exec_enter;
+ cc->cpu_exec_exit = m68k_cpu_exec_exit;
+
+ dc->vmsd = &vmstate_m68k_cpu;
+ cc->gdb_num_core_regs = 18;
+ cc->gdb_core_xml_file = "cf-core.xml";
+
+ /*
+ * Reason: m68k_cpu_initfn() calls cpu_exec_init(), which saves
+ * the object in cpus -> dangling pointer after final
+ * object_unref().
+ */
+ dc->cannot_destroy_with_object_finalize_yet = true;
+}
+
+static void register_cpu_type(const M68kCPUInfo *info)
+{
+ TypeInfo type_info = {
+ .parent = TYPE_M68K_CPU,
+ .instance_init = info->instance_init,
+ };
+
+ type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
+ type_register(&type_info);
+ g_free((void *)type_info.name);
+}
+
+static const TypeInfo m68k_cpu_type_info = {
+ .name = TYPE_M68K_CPU,
+ .parent = TYPE_CPU,
+ .instance_size = sizeof(M68kCPU),
+ .instance_init = m68k_cpu_initfn,
+ .abstract = true,
+ .class_size = sizeof(M68kCPUClass),
+ .class_init = m68k_cpu_class_init,
+};
+
+static void m68k_cpu_register_types(void)
+{
+ int i;
+
+ type_register_static(&m68k_cpu_type_info);
+ for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
+ register_cpu_type(&m68k_cpus[i]);
+ }
+}
+
+type_init(m68k_cpu_register_types)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 20:26:17 +0000