target-sh4/cpu.c - qemu - Git at Google

 /*
  * QEMU SuperH CPU
  *
  * Copyright (c) 2005 Samuel Tardieu
  * 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 superh_cpu_set_pc(CPUState *cs, vaddr value)
 {
     SuperHCPU *cpu = SUPERH_CPU(cs);

     cpu->env.pc = value;
 }

 static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
 {
     SuperHCPU *cpu = SUPERH_CPU(cs);

     cpu->env.pc = tb->pc;
     cpu->env.flags = tb->flags;
 }

 static bool superh_cpu_has_work(CPUState *cs)
 {
     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 }

 /* CPUClass::reset() */
 static void superh_cpu_reset(CPUState *s)
 {
     SuperHCPU *cpu = SUPERH_CPU(s);
     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
     CPUSH4State *env = &cpu->env;

     scc->parent_reset(s);

     memset(env, 0, offsetof(CPUSH4State, id));
     tlb_flush(s, 1);

     env->pc = 0xA0000000;
 #if defined(CONFIG_USER_ONLY)
     env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
     set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
 #else
     env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) |
               (1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0);
     env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
     set_float_rounding_mode(float_round_to_zero, &env->fp_status);
     set_flush_to_zero(1, &env->fp_status);
 #endif
     set_default_nan_mode(1, &env->fp_status);
 }

 static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
 {
     info->mach = bfd_mach_sh4;
     info->print_insn = print_insn_sh;
 }

 typedef struct SuperHCPUListState {
     fprintf_function cpu_fprintf;
     FILE *file;
 } SuperHCPUListState;

 /* Sort alphabetically by type name. */
 static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b)
 {
     ObjectClass *class_a = (ObjectClass *)a;
     ObjectClass *class_b = (ObjectClass *)b;
     const char *name_a, *name_b;

     name_a = object_class_get_name(class_a);
     name_b = object_class_get_name(class_b);
     return strcmp(name_a, name_b);
 }

 static void superh_cpu_list_entry(gpointer data, gpointer user_data)
 {
     ObjectClass *oc = data;
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
     SuperHCPUListState *s = user_data;

     (*s->cpu_fprintf)(s->file, "%s\n",
                       scc->name);
 }

 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 {
     SuperHCPUListState s = {
         .cpu_fprintf = cpu_fprintf,
         .file = f,
     };
     GSList *list;

     list = object_class_get_list(TYPE_SUPERH_CPU, false);
     list = g_slist_sort(list, superh_cpu_list_compare);
     g_slist_foreach(list, superh_cpu_list_entry, &s);
     g_slist_free(list);
 }

 static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b)
 {
     const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a);
     const char *name = b;

     return strcasecmp(scc->name, name);
 }

 static ObjectClass *superh_cpu_class_by_name(const char *cpu_model)
 {
     ObjectClass *oc;
     GSList *list, *item;

     if (cpu_model == NULL) {
         return NULL;
     }
     if (strcasecmp(cpu_model, "any") == 0) {
         return object_class_by_name(TYPE_SH7750R_CPU);
     }

     oc = object_class_by_name(cpu_model);
     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL
         && !object_class_is_abstract(oc)) {
         return oc;
     }

     oc = NULL;
     list = object_class_get_list(TYPE_SUPERH_CPU, false);
     item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare);
     if (item != NULL) {
         oc = item->data;
     }
     g_slist_free(list);
     return oc;
 }

 SuperHCPU *cpu_sh4_init(const char *cpu_model)
 {
     return SUPERH_CPU(cpu_generic_init(TYPE_SUPERH_CPU, cpu_model));
 }

 static void sh7750r_cpu_initfn(Object *obj)
 {
     SuperHCPU *cpu = SUPERH_CPU(obj);
     CPUSH4State *env = &cpu->env;

     env->id = SH_CPU_SH7750R;
     env->features = SH_FEATURE_BCR3_AND_BCR4;
 }

 static void sh7750r_class_init(ObjectClass *oc, void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

     scc->name = "SH7750R";
     scc->pvr = 0x00050000;
     scc->prr = 0x00000100;
     scc->cvr = 0x00110000;
 }

 static const TypeInfo sh7750r_type_info = {
     .name = TYPE_SH7750R_CPU,
     .parent = TYPE_SUPERH_CPU,
     .class_init = sh7750r_class_init,
     .instance_init = sh7750r_cpu_initfn,
 };

 static void sh7751r_cpu_initfn(Object *obj)
 {
     SuperHCPU *cpu = SUPERH_CPU(obj);
     CPUSH4State *env = &cpu->env;

     env->id = SH_CPU_SH7751R;
     env->features = SH_FEATURE_BCR3_AND_BCR4;
 }

 static void sh7751r_class_init(ObjectClass *oc, void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

     scc->name = "SH7751R";
     scc->pvr = 0x04050005;
     scc->prr = 0x00000113;
     scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */
 }

 static const TypeInfo sh7751r_type_info = {
     .name = TYPE_SH7751R_CPU,
     .parent = TYPE_SUPERH_CPU,
     .class_init = sh7751r_class_init,
     .instance_init = sh7751r_cpu_initfn,
 };

 static void sh7785_cpu_initfn(Object *obj)
 {
     SuperHCPU *cpu = SUPERH_CPU(obj);
     CPUSH4State *env = &cpu->env;

     env->id = SH_CPU_SH7785;
     env->features = SH_FEATURE_SH4A;
 }

 static void sh7785_class_init(ObjectClass *oc, void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

     scc->name = "SH7785";
     scc->pvr = 0x10300700;
     scc->prr = 0x00000200;
     scc->cvr = 0x71440211;
 }

 static const TypeInfo sh7785_type_info = {
     .name = TYPE_SH7785_CPU,
     .parent = TYPE_SUPERH_CPU,
     .class_init = sh7785_class_init,
     .instance_init = sh7785_cpu_initfn,
 };

 static void superh_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);

     cpu_reset(cs);
     qemu_init_vcpu(cs);

     scc->parent_realize(dev, errp);
 }

 static void superh_cpu_initfn(Object *obj)
 {
     CPUState *cs = CPU(obj);
     SuperHCPU *cpu = SUPERH_CPU(obj);
     CPUSH4State *env = &cpu->env;

     cs->env_ptr = env;
     cpu_exec_init(cs, &error_abort);

     env->movcal_backup_tail = &(env->movcal_backup);

     if (tcg_enabled()) {
         sh4_translate_init();
     }
 }

 static const VMStateDescription vmstate_sh_cpu = {
     .name = "cpu",
     .unmigratable = 1,
 };

 static void superh_cpu_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

     scc->parent_realize = dc->realize;
     dc->realize = superh_cpu_realizefn;

     scc->parent_reset = cc->reset;
     cc->reset = superh_cpu_reset;

     cc->class_by_name = superh_cpu_class_by_name;
     cc->has_work = superh_cpu_has_work;
     cc->do_interrupt = superh_cpu_do_interrupt;
     cc->cpu_exec_interrupt = superh_cpu_exec_interrupt;
     cc->dump_state = superh_cpu_dump_state;
     cc->set_pc = superh_cpu_set_pc;
     cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
     cc->gdb_read_register = superh_cpu_gdb_read_register;
     cc->gdb_write_register = superh_cpu_gdb_write_register;
 #ifdef CONFIG_USER_ONLY
     cc->handle_mmu_fault = superh_cpu_handle_mmu_fault;
 #else
     cc->get_phys_page_debug = superh_cpu_get_phys_page_debug;
 #endif
     cc->disas_set_info = superh_cpu_disas_set_info;

     cc->gdb_num_core_regs = 59;

     dc->vmsd = &vmstate_sh_cpu;

     /*
      * Reason: superh_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 const TypeInfo superh_cpu_type_info = {
     .name = TYPE_SUPERH_CPU,
     .parent = TYPE_CPU,
     .instance_size = sizeof(SuperHCPU),
     .instance_init = superh_cpu_initfn,
     .abstract = true,
     .class_size = sizeof(SuperHCPUClass),
     .class_init = superh_cpu_class_init,
 };

 static void superh_cpu_register_types(void)
 {
     type_register_static(&superh_cpu_type_info);
     type_register_static(&sh7750r_type_info);
     type_register_static(&sh7751r_type_info);
     type_register_static(&sh7785_type_info);
 }

 type_init(superh_cpu_register_types)
	/*
	* QEMU SuperH CPU
	*
	* Copyright (c) 2005 Samuel Tardieu
	* 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 superh_cpu_set_pc(CPUState *cs, vaddr value)
	{
	SuperHCPU *cpu = SUPERH_CPU(cs);

	cpu->env.pc = value;
	}

	static void superh_cpu_synchronize_from_tb(CPUState cs, TranslationBlock tb)
	{
	SuperHCPU *cpu = SUPERH_CPU(cs);

	cpu->env.pc = tb->pc;
	cpu->env.flags = tb->flags;
	}

	static bool superh_cpu_has_work(CPUState *cs)
	{
	return cs->interrupt_request & CPU_INTERRUPT_HARD;
	}

	/* CPUClass::reset() */
	static void superh_cpu_reset(CPUState *s)
	{
	SuperHCPU *cpu = SUPERH_CPU(s);
	SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
	CPUSH4State *env = &cpu->env;

	scc->parent_reset(s);

	memset(env, 0, offsetof(CPUSH4State, id));
	tlb_flush(s, 1);

	env->pc = 0xA0000000;
	#if defined(CONFIG_USER_ONLY)
	env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
	set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
	#else
	env->sr = (1u << SR_MD) \| (1u << SR_RB) \| (1u << SR_BL) \|
	(1u << SR_I3) \| (1u << SR_I2) \| (1u << SR_I1) \| (1u << SR_I0);
	env->fpscr = FPSCR_DN \| FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
	set_float_rounding_mode(float_round_to_zero, &env->fp_status);
	set_flush_to_zero(1, &env->fp_status);
	#endif
	set_default_nan_mode(1, &env->fp_status);
	}

	static void superh_cpu_disas_set_info(CPUState cpu, disassemble_info info)
	{
	info->mach = bfd_mach_sh4;
	info->print_insn = print_insn_sh;
	}

	typedef struct SuperHCPUListState {
	fprintf_function cpu_fprintf;
	FILE *file;
	} SuperHCPUListState;

	/* Sort alphabetically by type name. */
	static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b)
	{
	ObjectClass class_a = (ObjectClass )a;
	ObjectClass class_b = (ObjectClass )b;
	const char name_a, name_b;

	name_a = object_class_get_name(class_a);
	name_b = object_class_get_name(class_b);
	return strcmp(name_a, name_b);
	}

	static void superh_cpu_list_entry(gpointer data, gpointer user_data)
	{
	ObjectClass *oc = data;
	SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
	SuperHCPUListState *s = user_data;

	(*s->cpu_fprintf)(s->file, "%s\n",
	scc->name);
	}

	void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf)
	{
	SuperHCPUListState s = {
	.cpu_fprintf = cpu_fprintf,
	.file = f,
	};
	GSList *list;

	list = object_class_get_list(TYPE_SUPERH_CPU, false);
	list = g_slist_sort(list, superh_cpu_list_compare);
	g_slist_foreach(list, superh_cpu_list_entry, &s);
	g_slist_free(list);
	}

	static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b)
	{
	const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a);
	const char *name = b;

	return strcasecmp(scc->name, name);
	}

	static ObjectClass superh_cpu_class_by_name(const char cpu_model)
	{
	ObjectClass *oc;
	GSList list, item;

	if (cpu_model == NULL) {
	return NULL;
	}
	if (strcasecmp(cpu_model, "any") == 0) {
	return object_class_by_name(TYPE_SH7750R_CPU);
	}

	oc = object_class_by_name(cpu_model);
	if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL
	&& !object_class_is_abstract(oc)) {
	return oc;
	}

	oc = NULL;
	list = object_class_get_list(TYPE_SUPERH_CPU, false);
	item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare);
	if (item != NULL) {
	oc = item->data;
	}
	g_slist_free(list);
	return oc;
	}

	SuperHCPU cpu_sh4_init(const char cpu_model)
	{
	return SUPERH_CPU(cpu_generic_init(TYPE_SUPERH_CPU, cpu_model));
	}

	static void sh7750r_cpu_initfn(Object *obj)
	{
	SuperHCPU *cpu = SUPERH_CPU(obj);
	CPUSH4State *env = &cpu->env;

	env->id = SH_CPU_SH7750R;
	env->features = SH_FEATURE_BCR3_AND_BCR4;
	}

	static void sh7750r_class_init(ObjectClass oc, void data)
	{
	SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

	scc->name = "SH7750R";
	scc->pvr = 0x00050000;
	scc->prr = 0x00000100;
	scc->cvr = 0x00110000;
	}

	static const TypeInfo sh7750r_type_info = {
	.name = TYPE_SH7750R_CPU,
	.parent = TYPE_SUPERH_CPU,
	.class_init = sh7750r_class_init,
	.instance_init = sh7750r_cpu_initfn,
	};

	static void sh7751r_cpu_initfn(Object *obj)
	{
	SuperHCPU *cpu = SUPERH_CPU(obj);
	CPUSH4State *env = &cpu->env;

	env->id = SH_CPU_SH7751R;
	env->features = SH_FEATURE_BCR3_AND_BCR4;
	}

	static void sh7751r_class_init(ObjectClass oc, void data)
	{
	SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

	scc->name = "SH7751R";
	scc->pvr = 0x04050005;
	scc->prr = 0x00000113;
	scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */
	}

	static const TypeInfo sh7751r_type_info = {
	.name = TYPE_SH7751R_CPU,
	.parent = TYPE_SUPERH_CPU,
	.class_init = sh7751r_class_init,
	.instance_init = sh7751r_cpu_initfn,
	};

	static void sh7785_cpu_initfn(Object *obj)
	{
	SuperHCPU *cpu = SUPERH_CPU(obj);
	CPUSH4State *env = &cpu->env;

	env->id = SH_CPU_SH7785;
	env->features = SH_FEATURE_SH4A;
	}

	static void sh7785_class_init(ObjectClass oc, void data)
	{
	SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

	scc->name = "SH7785";
	scc->pvr = 0x10300700;
	scc->prr = 0x00000200;
	scc->cvr = 0x71440211;
	}

	static const TypeInfo sh7785_type_info = {
	.name = TYPE_SH7785_CPU,
	.parent = TYPE_SUPERH_CPU,
	.class_init = sh7785_class_init,
	.instance_init = sh7785_cpu_initfn,
	};

	static void superh_cpu_realizefn(DeviceState dev, Error *errp)
	{
	CPUState *cs = CPU(dev);
	SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);

	cpu_reset(cs);
	qemu_init_vcpu(cs);

	scc->parent_realize(dev, errp);
	}

	static void superh_cpu_initfn(Object *obj)
	{
	CPUState *cs = CPU(obj);
	SuperHCPU *cpu = SUPERH_CPU(obj);
	CPUSH4State *env = &cpu->env;

	cs->env_ptr = env;
	cpu_exec_init(cs, &error_abort);

	env->movcal_backup_tail = &(env->movcal_backup);

	if (tcg_enabled()) {
	sh4_translate_init();
	}
	}

	static const VMStateDescription vmstate_sh_cpu = {
	.name = "cpu",
	.unmigratable = 1,
	};

	static void superh_cpu_class_init(ObjectClass oc, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(oc);
	CPUClass *cc = CPU_CLASS(oc);
	SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);

	scc->parent_realize = dc->realize;
	dc->realize = superh_cpu_realizefn;

	scc->parent_reset = cc->reset;
	cc->reset = superh_cpu_reset;

	cc->class_by_name = superh_cpu_class_by_name;
	cc->has_work = superh_cpu_has_work;
	cc->do_interrupt = superh_cpu_do_interrupt;
	cc->cpu_exec_interrupt = superh_cpu_exec_interrupt;
	cc->dump_state = superh_cpu_dump_state;
	cc->set_pc = superh_cpu_set_pc;
	cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
	cc->gdb_read_register = superh_cpu_gdb_read_register;
	cc->gdb_write_register = superh_cpu_gdb_write_register;
	#ifdef CONFIG_USER_ONLY
	cc->handle_mmu_fault = superh_cpu_handle_mmu_fault;
	#else
	cc->get_phys_page_debug = superh_cpu_get_phys_page_debug;
	#endif
	cc->disas_set_info = superh_cpu_disas_set_info;

	cc->gdb_num_core_regs = 59;

	dc->vmsd = &vmstate_sh_cpu;

	/*
	* Reason: superh_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 const TypeInfo superh_cpu_type_info = {
	.name = TYPE_SUPERH_CPU,
	.parent = TYPE_CPU,
	.instance_size = sizeof(SuperHCPU),
	.instance_init = superh_cpu_initfn,
	.abstract = true,
	.class_size = sizeof(SuperHCPUClass),
	.class_init = superh_cpu_class_init,
	};

	static void superh_cpu_register_types(void)
	{
	type_register_static(&superh_cpu_type_info);
	type_register_static(&sh7750r_type_info);
	type_register_static(&sh7751r_type_info);
	type_register_static(&sh7785_type_info);
	}

	type_init(superh_cpu_register_types)