target/lm32/cpu.c - third_party/qemu - Git at Google

 /*
  * QEMU LatticeMico32 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 "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/qemu-print.h"
 #include "cpu.h"


 static void lm32_cpu_set_pc(CPUState *cs, vaddr value)
 {
     LM32CPU *cpu = LM32_CPU(cs);

     cpu->env.pc = value;
 }

 static void lm32_cpu_list_entry(gpointer data, gpointer user_data)
 {
     ObjectClass *oc = data;
     const char *typename = object_class_get_name(oc);
     char *name;

     name = g_strndup(typename, strlen(typename) - strlen(LM32_CPU_TYPE_SUFFIX));
     qemu_printf("  %s\n", name);
     g_free(name);
 }


 void lm32_cpu_list(void)
 {
     GSList *list;

     list = object_class_get_list_sorted(TYPE_LM32_CPU, false);
     qemu_printf("Available CPUs:\n");
     g_slist_foreach(list, lm32_cpu_list_entry, NULL);
     g_slist_free(list);
 }

 static void lm32_cpu_init_cfg_reg(LM32CPU *cpu)
 {
     CPULM32State *env = &cpu->env;
     uint32_t cfg = 0;

     if (cpu->features & LM32_FEATURE_MULTIPLY) {
         cfg |= CFG_M;
     }

     if (cpu->features & LM32_FEATURE_DIVIDE) {
         cfg |= CFG_D;
     }

     if (cpu->features & LM32_FEATURE_SHIFT) {
         cfg |= CFG_S;
     }

     if (cpu->features & LM32_FEATURE_SIGN_EXTEND) {
         cfg |= CFG_X;
     }

     if (cpu->features & LM32_FEATURE_I_CACHE) {
         cfg |= CFG_IC;
     }

     if (cpu->features & LM32_FEATURE_D_CACHE) {
         cfg |= CFG_DC;
     }

     if (cpu->features & LM32_FEATURE_CYCLE_COUNT) {
         cfg |= CFG_CC;
     }

     cfg |= (cpu->num_interrupts << CFG_INT_SHIFT);
     cfg |= (cpu->num_breakpoints << CFG_BP_SHIFT);
     cfg |= (cpu->num_watchpoints << CFG_WP_SHIFT);
     cfg |= (cpu->revision << CFG_REV_SHIFT);

     env->cfg = cfg;
 }

 static bool lm32_cpu_has_work(CPUState *cs)
 {
     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 }

 static void lm32_cpu_reset(DeviceState *dev)
 {
     CPUState *s = CPU(dev);
     LM32CPU *cpu = LM32_CPU(s);
     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
     CPULM32State *env = &cpu->env;

     lcc->parent_reset(dev);

     /* reset cpu state */
     memset(env, 0, offsetof(CPULM32State, end_reset_fields));

     lm32_cpu_init_cfg_reg(cpu);
 }

 static void lm32_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
 {
     info->mach = bfd_mach_lm32;
     info->print_insn = print_insn_lm32;
 }

 static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
     Error *local_err = NULL;

     cpu_exec_realizefn(cs, &local_err);
     if (local_err != NULL) {
         error_propagate(errp, local_err);
         return;
     }

     cpu_reset(cs);

     qemu_init_vcpu(cs);

     lcc->parent_realize(dev, errp);
 }

 static void lm32_cpu_initfn(Object *obj)
 {
     LM32CPU *cpu = LM32_CPU(obj);
     CPULM32State *env = &cpu->env;

     cpu_set_cpustate_pointers(cpu);

     env->flags = 0;
 }

 static void lm32_basic_cpu_initfn(Object *obj)
 {
     LM32CPU *cpu = LM32_CPU(obj);

     cpu->revision = 3;
     cpu->num_interrupts = 32;
     cpu->num_breakpoints = 4;
     cpu->num_watchpoints = 4;
     cpu->features = LM32_FEATURE_SHIFT
                   | LM32_FEATURE_SIGN_EXTEND
                   | LM32_FEATURE_CYCLE_COUNT;
 }

 static void lm32_standard_cpu_initfn(Object *obj)
 {
     LM32CPU *cpu = LM32_CPU(obj);

     cpu->revision = 3;
     cpu->num_interrupts = 32;
     cpu->num_breakpoints = 4;
     cpu->num_watchpoints = 4;
     cpu->features = LM32_FEATURE_MULTIPLY
                   | LM32_FEATURE_DIVIDE
                   | LM32_FEATURE_SHIFT
                   | LM32_FEATURE_SIGN_EXTEND
                   | LM32_FEATURE_I_CACHE
                   | LM32_FEATURE_CYCLE_COUNT;
 }

 static void lm32_full_cpu_initfn(Object *obj)
 {
     LM32CPU *cpu = LM32_CPU(obj);

     cpu->revision = 3;
     cpu->num_interrupts = 32;
     cpu->num_breakpoints = 4;
     cpu->num_watchpoints = 4;
     cpu->features = LM32_FEATURE_MULTIPLY
                   | LM32_FEATURE_DIVIDE
                   | LM32_FEATURE_SHIFT
                   | LM32_FEATURE_SIGN_EXTEND
                   | LM32_FEATURE_I_CACHE
                   | LM32_FEATURE_D_CACHE
                   | LM32_FEATURE_CYCLE_COUNT;
 }

 static ObjectClass *lm32_cpu_class_by_name(const char *cpu_model)
 {
     ObjectClass *oc;
     char *typename;

     typename = g_strdup_printf(LM32_CPU_TYPE_NAME("%s"), cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);
     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_LM32_CPU) ||
                        object_class_is_abstract(oc))) {
         oc = NULL;
     }
     return oc;
 }

 static void lm32_cpu_class_init(ObjectClass *oc, void *data)
 {
     LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);

     device_class_set_parent_realize(dc, lm32_cpu_realizefn,
                                     &lcc->parent_realize);
     device_class_set_parent_reset(dc, lm32_cpu_reset, &lcc->parent_reset);

     cc->class_by_name = lm32_cpu_class_by_name;
     cc->has_work = lm32_cpu_has_work;
     cc->do_interrupt = lm32_cpu_do_interrupt;
     cc->cpu_exec_interrupt = lm32_cpu_exec_interrupt;
     cc->dump_state = lm32_cpu_dump_state;
     cc->set_pc = lm32_cpu_set_pc;
     cc->gdb_read_register = lm32_cpu_gdb_read_register;
     cc->gdb_write_register = lm32_cpu_gdb_write_register;
     cc->tlb_fill = lm32_cpu_tlb_fill;
 #ifndef CONFIG_USER_ONLY
     cc->get_phys_page_debug = lm32_cpu_get_phys_page_debug;
     cc->vmsd = &vmstate_lm32_cpu;
 #endif
     cc->gdb_num_core_regs = 32 + 7;
     cc->gdb_stop_before_watchpoint = true;
     cc->debug_excp_handler = lm32_debug_excp_handler;
     cc->disas_set_info = lm32_cpu_disas_set_info;
     cc->tcg_initialize = lm32_translate_init;
 }

 #define DEFINE_LM32_CPU_TYPE(cpu_model, initfn) \
     { \
         .parent = TYPE_LM32_CPU, \
         .name = LM32_CPU_TYPE_NAME(cpu_model), \
         .instance_init = initfn, \
     }

 static const TypeInfo lm32_cpus_type_infos[] = {
     { /* base class should be registered first */
          .name = TYPE_LM32_CPU,
          .parent = TYPE_CPU,
          .instance_size = sizeof(LM32CPU),
          .instance_init = lm32_cpu_initfn,
          .abstract = true,
          .class_size = sizeof(LM32CPUClass),
          .class_init = lm32_cpu_class_init,
     },
     DEFINE_LM32_CPU_TYPE("lm32-basic", lm32_basic_cpu_initfn),
     DEFINE_LM32_CPU_TYPE("lm32-standard", lm32_standard_cpu_initfn),
     DEFINE_LM32_CPU_TYPE("lm32-full", lm32_full_cpu_initfn),
 };

 DEFINE_TYPES(lm32_cpus_type_infos)
	/*
	* QEMU LatticeMico32 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 "qemu/osdep.h"
	#include "qapi/error.h"
	#include "qemu/qemu-print.h"
	#include "cpu.h"


	static void lm32_cpu_set_pc(CPUState *cs, vaddr value)
	{
	LM32CPU *cpu = LM32_CPU(cs);

	cpu->env.pc = value;
	}

	static void lm32_cpu_list_entry(gpointer data, gpointer user_data)
	{
	ObjectClass *oc = data;
	const char *typename = object_class_get_name(oc);
	char *name;

	name = g_strndup(typename, strlen(typename) - strlen(LM32_CPU_TYPE_SUFFIX));
	qemu_printf(" %s\n", name);
	g_free(name);
	}


	void lm32_cpu_list(void)
	{
	GSList *list;

	list = object_class_get_list_sorted(TYPE_LM32_CPU, false);
	qemu_printf("Available CPUs:\n");
	g_slist_foreach(list, lm32_cpu_list_entry, NULL);
	g_slist_free(list);
	}

	static void lm32_cpu_init_cfg_reg(LM32CPU *cpu)
	{
	CPULM32State *env = &cpu->env;
	uint32_t cfg = 0;

	if (cpu->features & LM32_FEATURE_MULTIPLY) {
	cfg \|= CFG_M;
	}

	if (cpu->features & LM32_FEATURE_DIVIDE) {
	cfg \|= CFG_D;
	}

	if (cpu->features & LM32_FEATURE_SHIFT) {
	cfg \|= CFG_S;
	}

	if (cpu->features & LM32_FEATURE_SIGN_EXTEND) {
	cfg \|= CFG_X;
	}

	if (cpu->features & LM32_FEATURE_I_CACHE) {
	cfg \|= CFG_IC;
	}

	if (cpu->features & LM32_FEATURE_D_CACHE) {
	cfg \|= CFG_DC;
	}

	if (cpu->features & LM32_FEATURE_CYCLE_COUNT) {
	cfg \|= CFG_CC;
	}

	cfg \|= (cpu->num_interrupts << CFG_INT_SHIFT);
	cfg \|= (cpu->num_breakpoints << CFG_BP_SHIFT);
	cfg \|= (cpu->num_watchpoints << CFG_WP_SHIFT);
	cfg \|= (cpu->revision << CFG_REV_SHIFT);

	env->cfg = cfg;
	}

	static bool lm32_cpu_has_work(CPUState *cs)
	{
	return cs->interrupt_request & CPU_INTERRUPT_HARD;
	}

	static void lm32_cpu_reset(DeviceState *dev)
	{
	CPUState *s = CPU(dev);
	LM32CPU *cpu = LM32_CPU(s);
	LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
	CPULM32State *env = &cpu->env;

	lcc->parent_reset(dev);

	/* reset cpu state */
	memset(env, 0, offsetof(CPULM32State, end_reset_fields));

	lm32_cpu_init_cfg_reg(cpu);
	}

	static void lm32_cpu_disas_set_info(CPUState cpu, disassemble_info info)
	{
	info->mach = bfd_mach_lm32;
	info->print_insn = print_insn_lm32;
	}

	static void lm32_cpu_realizefn(DeviceState dev, Error *errp)
	{
	CPUState *cs = CPU(dev);
	LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
	Error *local_err = NULL;

	cpu_exec_realizefn(cs, &local_err);
	if (local_err != NULL) {
	error_propagate(errp, local_err);
	return;
	}

	cpu_reset(cs);

	qemu_init_vcpu(cs);

	lcc->parent_realize(dev, errp);
	}

	static void lm32_cpu_initfn(Object *obj)
	{
	LM32CPU *cpu = LM32_CPU(obj);
	CPULM32State *env = &cpu->env;

	cpu_set_cpustate_pointers(cpu);

	env->flags = 0;
	}

	static void lm32_basic_cpu_initfn(Object *obj)
	{
	LM32CPU *cpu = LM32_CPU(obj);

	cpu->revision = 3;
	cpu->num_interrupts = 32;
	cpu->num_breakpoints = 4;
	cpu->num_watchpoints = 4;
	cpu->features = LM32_FEATURE_SHIFT
	\| LM32_FEATURE_SIGN_EXTEND
	\| LM32_FEATURE_CYCLE_COUNT;
	}

	static void lm32_standard_cpu_initfn(Object *obj)
	{
	LM32CPU *cpu = LM32_CPU(obj);

	cpu->revision = 3;
	cpu->num_interrupts = 32;
	cpu->num_breakpoints = 4;
	cpu->num_watchpoints = 4;
	cpu->features = LM32_FEATURE_MULTIPLY
	\| LM32_FEATURE_DIVIDE
	\| LM32_FEATURE_SHIFT
	\| LM32_FEATURE_SIGN_EXTEND
	\| LM32_FEATURE_I_CACHE
	\| LM32_FEATURE_CYCLE_COUNT;
	}

	static void lm32_full_cpu_initfn(Object *obj)
	{
	LM32CPU *cpu = LM32_CPU(obj);

	cpu->revision = 3;
	cpu->num_interrupts = 32;
	cpu->num_breakpoints = 4;
	cpu->num_watchpoints = 4;
	cpu->features = LM32_FEATURE_MULTIPLY
	\| LM32_FEATURE_DIVIDE
	\| LM32_FEATURE_SHIFT
	\| LM32_FEATURE_SIGN_EXTEND
	\| LM32_FEATURE_I_CACHE
	\| LM32_FEATURE_D_CACHE
	\| LM32_FEATURE_CYCLE_COUNT;
	}

	static ObjectClass lm32_cpu_class_by_name(const char cpu_model)
	{
	ObjectClass *oc;
	char *typename;

	typename = g_strdup_printf(LM32_CPU_TYPE_NAME("%s"), cpu_model);
	oc = object_class_by_name(typename);
	g_free(typename);
	if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_LM32_CPU) \|\|
	object_class_is_abstract(oc))) {
	oc = NULL;
	}
	return oc;
	}

	static void lm32_cpu_class_init(ObjectClass oc, void data)
	{
	LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
	CPUClass *cc = CPU_CLASS(oc);
	DeviceClass *dc = DEVICE_CLASS(oc);

	device_class_set_parent_realize(dc, lm32_cpu_realizefn,
	&lcc->parent_realize);
	device_class_set_parent_reset(dc, lm32_cpu_reset, &lcc->parent_reset);

	cc->class_by_name = lm32_cpu_class_by_name;
	cc->has_work = lm32_cpu_has_work;
	cc->do_interrupt = lm32_cpu_do_interrupt;
	cc->cpu_exec_interrupt = lm32_cpu_exec_interrupt;
	cc->dump_state = lm32_cpu_dump_state;
	cc->set_pc = lm32_cpu_set_pc;
	cc->gdb_read_register = lm32_cpu_gdb_read_register;
	cc->gdb_write_register = lm32_cpu_gdb_write_register;
	cc->tlb_fill = lm32_cpu_tlb_fill;
	#ifndef CONFIG_USER_ONLY
	cc->get_phys_page_debug = lm32_cpu_get_phys_page_debug;
	cc->vmsd = &vmstate_lm32_cpu;
	#endif
	cc->gdb_num_core_regs = 32 + 7;
	cc->gdb_stop_before_watchpoint = true;
	cc->debug_excp_handler = lm32_debug_excp_handler;
	cc->disas_set_info = lm32_cpu_disas_set_info;
	cc->tcg_initialize = lm32_translate_init;
	}

	#define DEFINE_LM32_CPU_TYPE(cpu_model, initfn) \
	{ \
	.parent = TYPE_LM32_CPU, \
	.name = LM32_CPU_TYPE_NAME(cpu_model), \
	.instance_init = initfn, \
	}

	static const TypeInfo lm32_cpus_type_infos[] = {
	{ /* base class should be registered first */
	.name = TYPE_LM32_CPU,
	.parent = TYPE_CPU,
	.instance_size = sizeof(LM32CPU),
	.instance_init = lm32_cpu_initfn,
	.abstract = true,
	.class_size = sizeof(LM32CPUClass),
	.class_init = lm32_cpu_class_init,
	},
	DEFINE_LM32_CPU_TYPE("lm32-basic", lm32_basic_cpu_initfn),
	DEFINE_LM32_CPU_TYPE("lm32-standard", lm32_standard_cpu_initfn),
	DEFINE_LM32_CPU_TYPE("lm32-full", lm32_full_cpu_initfn),
	};

	DEFINE_TYPES(lm32_cpus_type_infos)