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* Copyright (c) 2009 Edgar E. Iglesias
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* Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
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* Copyright (c) 2012 SUSE LINUX Products GmbH
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* Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
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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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* 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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* 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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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "hw/qdev-properties.h"
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#include "migration/vmstate.h"
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#include "exec/exec-all.h"
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/* These key value are as per MBV field in PVR0 */
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static void mb_cpu_set_pc(CPUState *cs, vaddr value)
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MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
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cpu->env.sregs[SR_PC] = value;
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static bool mb_cpu_has_work(CPUState *cs)
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return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
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#ifndef CONFIG_USER_ONLY
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static void microblaze_cpu_set_irq(void *opaque, int irq, int level)
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MicroBlazeCPU *cpu = opaque;
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CPUState *cs = CPU(cpu);
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int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD;
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cpu_interrupt(cs, type);
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cpu_reset_interrupt(cs, type);
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/* CPUClass::reset() */
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static void mb_cpu_reset(CPUState *s)
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MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
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MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
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CPUMBState *env = &cpu->env;
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mcc->parent_reset(s);
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memset(env, 0, offsetof(CPUMBState, end_reset_fields));
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env->res_addr = RES_ADDR_NONE;
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/* Disable stack protector. */
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env->sregs[SR_PC] = cpu->cfg.base_vectors;
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#if defined(CONFIG_USER_ONLY)
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/* start in user mode with interrupts enabled. */
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env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
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env->sregs[SR_MSR] = 0;
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env->mmu.c_mmu_tlb_access = 3;
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env->mmu.c_mmu_zones = 16;
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static void mb_disas_set_info(CPUState *cpu, disassemble_info *info)
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info->mach = bfd_arch_microblaze;
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info->print_insn = print_insn_microblaze;
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static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
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CPUState *cs = CPU(dev);
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MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
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MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
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CPUMBState *env = &cpu->env;
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uint8_t version_code = 0;
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Error *local_err = NULL;
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cpu_exec_realizefn(cs, &local_err);
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if (local_err != NULL) {
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error_propagate(errp, local_err);
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env->pvr.regs[0] = PVR0_USE_BARREL_MASK \
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| PVR0_USE_DIV_MASK \
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| PVR0_USE_HW_MUL_MASK \
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| PVR0_USE_EXC_MASK \
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| PVR0_USE_ICACHE_MASK \
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| PVR0_USE_DCACHE_MASK \
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env->pvr.regs[2] = PVR2_D_OPB_MASK \
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| PVR2_USE_MSR_INSTR \
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| PVR2_USE_PCMP_INSTR \
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| PVR2_USE_BARREL_MASK \
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| PVR2_USE_DIV_MASK \
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| PVR2_USE_HW_MUL_MASK \
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| PVR2_USE_MUL64_MASK \
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| PVR2_FPU_EXC_MASK \
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for (i = 0; mb_cpu_lookup[i].name && cpu->cfg.version; i++) {
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if (strcmp(mb_cpu_lookup[i].name, cpu->cfg.version) == 0) {
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version_code = mb_cpu_lookup[i].version_id;
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qemu_log("Invalid MicroBlaze version number: %s\n", cpu->cfg.version);
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env->pvr.regs[0] |= (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) |
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(cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) |
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(cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) |
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(cpu->cfg.endi ? PVR0_ENDI_MASK : 0) |
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(version_code << 16) |
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(cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0);
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env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) |
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(cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0);
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env->pvr.regs[5] |= cpu->cfg.dcache_writeback ?
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PVR5_DCACHE_WRITEBACK_MASK : 0;
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env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */
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env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
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mcc->parent_realize(dev, errp);
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static void mb_cpu_initfn(Object *obj)
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CPUState *cs = CPU(obj);
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MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
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CPUMBState *env = &cpu->env;
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static bool tcg_initialized;
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set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
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#ifndef CONFIG_USER_ONLY
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/* Inbound IRQ and FIR lines */
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qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2);
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if (tcg_enabled() && !tcg_initialized) {
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tcg_initialized = true;
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static const VMStateDescription vmstate_mb_cpu = {
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static Property mb_properties[] = {
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DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0),
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DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot,
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/* If use-fpu > 0 - FPU is enabled
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* If use-fpu = 2 - Floating point conversion and square root instructions
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DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2),
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DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true),
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DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback,
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DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false),
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DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version),
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DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL),
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DEFINE_PROP_END_OF_LIST(),
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static void mb_cpu_class_init(ObjectClass *oc, void *data)
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DeviceClass *dc = DEVICE_CLASS(oc);
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CPUClass *cc = CPU_CLASS(oc);
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MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc);
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mcc->parent_realize = dc->realize;
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dc->realize = mb_cpu_realizefn;
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mcc->parent_reset = cc->reset;
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cc->reset = mb_cpu_reset;
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cc->has_work = mb_cpu_has_work;
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cc->do_interrupt = mb_cpu_do_interrupt;
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cc->cpu_exec_interrupt = mb_cpu_exec_interrupt;
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cc->dump_state = mb_cpu_dump_state;
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cc->set_pc = mb_cpu_set_pc;
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cc->gdb_read_register = mb_cpu_gdb_read_register;
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cc->gdb_write_register = mb_cpu_gdb_write_register;
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#ifdef CONFIG_USER_ONLY
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cc->handle_mmu_fault = mb_cpu_handle_mmu_fault;
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cc->do_unassigned_access = mb_cpu_unassigned_access;
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cc->get_phys_page_debug = mb_cpu_get_phys_page_debug;
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dc->vmsd = &vmstate_mb_cpu;
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dc->props = mb_properties;
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cc->gdb_num_core_regs = 32 + 5;
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cc->disas_set_info = mb_disas_set_info;
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static const TypeInfo mb_cpu_type_info = {
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.name = TYPE_MICROBLAZE_CPU,
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.instance_size = sizeof(MicroBlazeCPU),
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.instance_init = mb_cpu_initfn,
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.class_size = sizeof(MicroBlazeCPUClass),
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.class_init = mb_cpu_class_init,
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static void mb_cpu_register_types(void)
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type_register_static(&mb_cpu_type_info);
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type_init(mb_cpu_register_types)