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

 /*
  * QEMU OpenRISC CPU
  *
  * Copyright (c) 2012 Jia Liu <proljc@gmail.com>
  *
  * 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/>.
  */

 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/qemu-print.h"
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "fpu/softfloat-helpers.h"
 #include "tcg/tcg.h"

 static void openrisc_cpu_set_pc(CPUState *cs, vaddr value)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(cs);

     cpu->env.pc = value;
     cpu->env.dflag = 0;
 }

 static vaddr openrisc_cpu_get_pc(CPUState *cs)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(cs);

     return cpu->env.pc;
 }

 static void openrisc_cpu_synchronize_from_tb(CPUState *cs,
                                              const TranslationBlock *tb)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(cs);

     tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL));
     cpu->env.pc = tb->pc;
 }

 static void openrisc_restore_state_to_opc(CPUState *cs,
                                           const TranslationBlock *tb,
                                           const uint64_t *data)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(cs);

     cpu->env.pc = data[0];
     cpu->env.dflag = data[1] & 1;
     if (data[1] & 2) {
         cpu->env.ppc = cpu->env.pc - 4;
     }
 }

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

 static int openrisc_cpu_mmu_index(CPUState *cs, bool ifetch)
 {
     CPUOpenRISCState *env = cpu_env(cs);

     if (env->sr & (ifetch ? SR_IME : SR_DME)) {
         /* The mmu is enabled; test supervisor state.  */
         return env->sr & SR_SM ? MMU_SUPERVISOR_IDX : MMU_USER_IDX;
     }

     return MMU_NOMMU_IDX;  /* mmu is disabled */
 }

 static void openrisc_disas_set_info(CPUState *cpu, disassemble_info *info)
 {
     info->print_insn = print_insn_or1k;
 }

 static void openrisc_cpu_reset_hold(Object *obj, ResetType type)
 {
     CPUState *cs = CPU(obj);
     OpenRISCCPU *cpu = OPENRISC_CPU(cs);
     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(obj);

     if (occ->parent_phases.hold) {
         occ->parent_phases.hold(obj, type);
     }

     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields));

     cpu->env.pc = 0x100;
     cpu->env.sr = SR_FO | SR_SM;
     cpu->env.lock_addr = -1;
     cs->exception_index = -1;
     cpu_set_fpcsr(&cpu->env, 0);

     set_float_detect_tininess(float_tininess_before_rounding,
                               &cpu->env.fp_status);

 #ifndef CONFIG_USER_ONLY
     cpu->env.picmr = 0x00000000;
     cpu->env.picsr = 0x00000000;

     cpu->env.ttmr = 0x00000000;
 #endif
 }

 #ifndef CONFIG_USER_ONLY
 static void openrisc_cpu_set_irq(void *opaque, int irq, int level)
 {
     OpenRISCCPU *cpu = (OpenRISCCPU *)opaque;
     CPUState *cs = CPU(cpu);
     uint32_t irq_bit;

     if (irq > 31 || irq < 0) {
         return;
     }

     irq_bit = 1U << irq;

     if (level) {
         cpu->env.picsr |= irq_bit;
     } else {
         cpu->env.picsr &= ~irq_bit;
     }

     if (cpu->env.picsr & cpu->env.picmr) {
         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
     } else {
         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
     }
 }
 #endif

 static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev);
     Error *local_err = NULL;

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

     qemu_init_vcpu(cs);
     cpu_reset(cs);

     occ->parent_realize(dev, errp);
 }

 static void openrisc_cpu_initfn(Object *obj)
 {
 #ifndef CONFIG_USER_ONLY
     qdev_init_gpio_in_named(DEVICE(obj), openrisc_cpu_set_irq, "IRQ", NR_IRQS);
 #endif
 }

 /* CPU models */

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

     typename = g_strdup_printf(OPENRISC_CPU_TYPE_NAME("%s"), cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

     return oc;
 }

 static void or1200_initfn(Object *obj)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(obj);

     cpu->env.vr = 0x13000008;
     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
     cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
                        CPUCFGR_EVBARP;

     /* 1Way, TLB_SIZE entries.  */
     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
                       | (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
                       | (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
 }

 static void openrisc_any_initfn(Object *obj)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(obj);

     cpu->env.vr = 0x13000040;   /* Obsolete VER + UVRP for new SPRs */
     cpu->env.vr2 = 0;           /* No version specific id */
     cpu->env.avr = 0x01030000;  /* Architecture v1.3 */

     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
     cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
                        CPUCFGR_AVRP | CPUCFGR_EVBARP | CPUCFGR_OF64A32S;

     /* 1Way, TLB_SIZE entries.  */
     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
                       | (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
                       | (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
 }

 #ifndef CONFIG_USER_ONLY
 #include "hw/core/sysemu-cpu-ops.h"

 static const struct SysemuCPUOps openrisc_sysemu_ops = {
     .get_phys_page_debug = openrisc_cpu_get_phys_page_debug,
 };
 #endif

 #include "hw/core/tcg-cpu-ops.h"

 static const TCGCPUOps openrisc_tcg_ops = {
     .initialize = openrisc_translate_init,
     .synchronize_from_tb = openrisc_cpu_synchronize_from_tb,
     .restore_state_to_opc = openrisc_restore_state_to_opc,

 #ifndef CONFIG_USER_ONLY
     .tlb_fill = openrisc_cpu_tlb_fill,
     .cpu_exec_interrupt = openrisc_cpu_exec_interrupt,
     .do_interrupt = openrisc_cpu_do_interrupt,
 #endif /* !CONFIG_USER_ONLY */
 };

 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
 {
     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(occ);
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);

     device_class_set_parent_realize(dc, openrisc_cpu_realizefn,
                                     &occ->parent_realize);
     resettable_class_set_parent_phases(rc, NULL, openrisc_cpu_reset_hold, NULL,
                                        &occ->parent_phases);

     cc->class_by_name = openrisc_cpu_class_by_name;
     cc->has_work = openrisc_cpu_has_work;
     cc->mmu_index = openrisc_cpu_mmu_index;
     cc->dump_state = openrisc_cpu_dump_state;
     cc->set_pc = openrisc_cpu_set_pc;
     cc->get_pc = openrisc_cpu_get_pc;
     cc->gdb_read_register = openrisc_cpu_gdb_read_register;
     cc->gdb_write_register = openrisc_cpu_gdb_write_register;
 #ifndef CONFIG_USER_ONLY
     dc->vmsd = &vmstate_openrisc_cpu;
     cc->sysemu_ops = &openrisc_sysemu_ops;
 #endif
     cc->gdb_num_core_regs = 32 + 3;
     cc->disas_set_info = openrisc_disas_set_info;
     cc->tcg_ops = &openrisc_tcg_ops;
 }

 #define DEFINE_OPENRISC_CPU_TYPE(cpu_model, initfn) \
     {                                               \
         .parent = TYPE_OPENRISC_CPU,                \
         .instance_init = initfn,                    \
         .name = OPENRISC_CPU_TYPE_NAME(cpu_model),  \
     }

 static const TypeInfo openrisc_cpus_type_infos[] = {
     { /* base class should be registered first */
         .name = TYPE_OPENRISC_CPU,
         .parent = TYPE_CPU,
         .instance_size = sizeof(OpenRISCCPU),
         .instance_align = __alignof(OpenRISCCPU),
         .instance_init = openrisc_cpu_initfn,
         .abstract = true,
         .class_size = sizeof(OpenRISCCPUClass),
         .class_init = openrisc_cpu_class_init,
     },
     DEFINE_OPENRISC_CPU_TYPE("or1200", or1200_initfn),
     DEFINE_OPENRISC_CPU_TYPE("any", openrisc_any_initfn),
 };

 DEFINE_TYPES(openrisc_cpus_type_infos)
	/*
	* QEMU OpenRISC CPU
	*
	* Copyright (c) 2012 Jia Liu <proljc@gmail.com>
	*
	* 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/>.
	*/

	#include "qemu/osdep.h"
	#include "qapi/error.h"
	#include "qemu/qemu-print.h"
	#include "cpu.h"
	#include "exec/exec-all.h"
	#include "fpu/softfloat-helpers.h"
	#include "tcg/tcg.h"

	static void openrisc_cpu_set_pc(CPUState *cs, vaddr value)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(cs);

	cpu->env.pc = value;
	cpu->env.dflag = 0;
	}

	static vaddr openrisc_cpu_get_pc(CPUState *cs)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(cs);

	return cpu->env.pc;
	}

	static void openrisc_cpu_synchronize_from_tb(CPUState *cs,
	const TranslationBlock *tb)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(cs);

	tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL));
	cpu->env.pc = tb->pc;
	}

	static void openrisc_restore_state_to_opc(CPUState *cs,
	const TranslationBlock *tb,
	const uint64_t *data)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(cs);

	cpu->env.pc = data[0];
	cpu->env.dflag = data[1] & 1;
	if (data[1] & 2) {
	cpu->env.ppc = cpu->env.pc - 4;
	}
	}

	static bool openrisc_cpu_has_work(CPUState *cs)
	{
	return cs->interrupt_request & (CPU_INTERRUPT_HARD \|
	CPU_INTERRUPT_TIMER);
	}

	static int openrisc_cpu_mmu_index(CPUState *cs, bool ifetch)
	{
	CPUOpenRISCState *env = cpu_env(cs);

	if (env->sr & (ifetch ? SR_IME : SR_DME)) {
	/* The mmu is enabled; test supervisor state. */
	return env->sr & SR_SM ? MMU_SUPERVISOR_IDX : MMU_USER_IDX;
	}

	return MMU_NOMMU_IDX; /* mmu is disabled */
	}

	static void openrisc_disas_set_info(CPUState cpu, disassemble_info info)
	{
	info->print_insn = print_insn_or1k;
	}

	static void openrisc_cpu_reset_hold(Object *obj, ResetType type)
	{
	CPUState *cs = CPU(obj);
	OpenRISCCPU *cpu = OPENRISC_CPU(cs);
	OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(obj);

	if (occ->parent_phases.hold) {
	occ->parent_phases.hold(obj, type);
	}

	memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields));

	cpu->env.pc = 0x100;
	cpu->env.sr = SR_FO \| SR_SM;
	cpu->env.lock_addr = -1;
	cs->exception_index = -1;
	cpu_set_fpcsr(&cpu->env, 0);

	set_float_detect_tininess(float_tininess_before_rounding,
	&cpu->env.fp_status);

	#ifndef CONFIG_USER_ONLY
	cpu->env.picmr = 0x00000000;
	cpu->env.picsr = 0x00000000;

	cpu->env.ttmr = 0x00000000;
	#endif
	}

	#ifndef CONFIG_USER_ONLY
	static void openrisc_cpu_set_irq(void *opaque, int irq, int level)
	{
	OpenRISCCPU cpu = (OpenRISCCPU )opaque;
	CPUState *cs = CPU(cpu);
	uint32_t irq_bit;

	if (irq > 31 \|\| irq < 0) {
	return;
	}

	irq_bit = 1U << irq;

	if (level) {
	cpu->env.picsr \|= irq_bit;
	} else {
	cpu->env.picsr &= ~irq_bit;
	}

	if (cpu->env.picsr & cpu->env.picmr) {
	cpu_interrupt(cs, CPU_INTERRUPT_HARD);
	} else {
	cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
	}
	}
	#endif

	static void openrisc_cpu_realizefn(DeviceState dev, Error *errp)
	{
	CPUState *cs = CPU(dev);
	OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev);
	Error *local_err = NULL;

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

	qemu_init_vcpu(cs);
	cpu_reset(cs);

	occ->parent_realize(dev, errp);
	}

	static void openrisc_cpu_initfn(Object *obj)
	{
	#ifndef CONFIG_USER_ONLY
	qdev_init_gpio_in_named(DEVICE(obj), openrisc_cpu_set_irq, "IRQ", NR_IRQS);
	#endif
	}

	/* CPU models */

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

	typename = g_strdup_printf(OPENRISC_CPU_TYPE_NAME("%s"), cpu_model);
	oc = object_class_by_name(typename);
	g_free(typename);

	return oc;
	}

	static void or1200_initfn(Object *obj)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(obj);

	cpu->env.vr = 0x13000008;
	cpu->env.upr = UPR_UP \| UPR_DMP \| UPR_IMP \| UPR_PICP \| UPR_TTP \| UPR_PMP;
	cpu->env.cpucfgr = CPUCFGR_NSGF \| CPUCFGR_OB32S \| CPUCFGR_OF32S \|
	CPUCFGR_EVBARP;

	/* 1Way, TLB_SIZE entries. */
	cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
	\| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
	cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
	\| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
	}

	static void openrisc_any_initfn(Object *obj)
	{
	OpenRISCCPU *cpu = OPENRISC_CPU(obj);

	cpu->env.vr = 0x13000040; /* Obsolete VER + UVRP for new SPRs */
	cpu->env.vr2 = 0; /* No version specific id */
	cpu->env.avr = 0x01030000; /* Architecture v1.3 */

	cpu->env.upr = UPR_UP \| UPR_DMP \| UPR_IMP \| UPR_PICP \| UPR_TTP \| UPR_PMP;
	cpu->env.cpucfgr = CPUCFGR_NSGF \| CPUCFGR_OB32S \| CPUCFGR_OF32S \|
	CPUCFGR_AVRP \| CPUCFGR_EVBARP \| CPUCFGR_OF64A32S;

	/* 1Way, TLB_SIZE entries. */
	cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
	\| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
	cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
	\| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
	}

	#ifndef CONFIG_USER_ONLY
	#include "hw/core/sysemu-cpu-ops.h"

	static const struct SysemuCPUOps openrisc_sysemu_ops = {
	.get_phys_page_debug = openrisc_cpu_get_phys_page_debug,
	};
	#endif

	#include "hw/core/tcg-cpu-ops.h"

	static const TCGCPUOps openrisc_tcg_ops = {
	.initialize = openrisc_translate_init,
	.synchronize_from_tb = openrisc_cpu_synchronize_from_tb,
	.restore_state_to_opc = openrisc_restore_state_to_opc,

	#ifndef CONFIG_USER_ONLY
	.tlb_fill = openrisc_cpu_tlb_fill,
	.cpu_exec_interrupt = openrisc_cpu_exec_interrupt,
	.do_interrupt = openrisc_cpu_do_interrupt,
	#endif /* !CONFIG_USER_ONLY */
	};

	static void openrisc_cpu_class_init(ObjectClass oc, void data)
	{
	OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
	CPUClass *cc = CPU_CLASS(occ);
	DeviceClass *dc = DEVICE_CLASS(oc);
	ResettableClass *rc = RESETTABLE_CLASS(oc);

	device_class_set_parent_realize(dc, openrisc_cpu_realizefn,
	&occ->parent_realize);
	resettable_class_set_parent_phases(rc, NULL, openrisc_cpu_reset_hold, NULL,
	&occ->parent_phases);

	cc->class_by_name = openrisc_cpu_class_by_name;
	cc->has_work = openrisc_cpu_has_work;
	cc->mmu_index = openrisc_cpu_mmu_index;
	cc->dump_state = openrisc_cpu_dump_state;
	cc->set_pc = openrisc_cpu_set_pc;
	cc->get_pc = openrisc_cpu_get_pc;
	cc->gdb_read_register = openrisc_cpu_gdb_read_register;
	cc->gdb_write_register = openrisc_cpu_gdb_write_register;
	#ifndef CONFIG_USER_ONLY
	dc->vmsd = &vmstate_openrisc_cpu;
	cc->sysemu_ops = &openrisc_sysemu_ops;
	#endif
	cc->gdb_num_core_regs = 32 + 3;
	cc->disas_set_info = openrisc_disas_set_info;
	cc->tcg_ops = &openrisc_tcg_ops;
	}

	#define DEFINE_OPENRISC_CPU_TYPE(cpu_model, initfn) \
	{ \
	.parent = TYPE_OPENRISC_CPU, \
	.instance_init = initfn, \
	.name = OPENRISC_CPU_TYPE_NAME(cpu_model), \
	}

	static const TypeInfo openrisc_cpus_type_infos[] = {
	{ /* base class should be registered first */
	.name = TYPE_OPENRISC_CPU,
	.parent = TYPE_CPU,
	.instance_size = sizeof(OpenRISCCPU),
	.instance_align = __alignof(OpenRISCCPU),
	.instance_init = openrisc_cpu_initfn,
	.abstract = true,
	.class_size = sizeof(OpenRISCCPUClass),
	.class_init = openrisc_cpu_class_init,
	},
	DEFINE_OPENRISC_CPU_TYPE("or1200", or1200_initfn),
	DEFINE_OPENRISC_CPU_TYPE("any", openrisc_any_initfn),
	};

	DEFINE_TYPES(openrisc_cpus_type_infos)