/* * QEMU MicroBlaze CPU * * Copyright (c) 2009 Edgar E. Iglesias * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd. * Copyright (c) 2012 SUSE LINUX Products GmbH * Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB. * * 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 * */ #include "cpu.h" #include "qemu-common.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" static void mb_cpu_set_pc(CPUState *cs, vaddr value) { MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); cpu->env.sregs[SR_PC] = value; } static bool mb_cpu_has_work(CPUState *cs) { return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI); } #ifndef CONFIG_USER_ONLY static void microblaze_cpu_set_irq(void *opaque, int irq, int level) { MicroBlazeCPU *cpu = opaque; CPUState *cs = CPU(cpu); int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD; if (level) { cpu_interrupt(cs, type); } else { cpu_reset_interrupt(cs, type); } } #endif /* CPUClass::reset() */ static void mb_cpu_reset(CPUState *s) { MicroBlazeCPU *cpu = MICROBLAZE_CPU(s); MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu); CPUMBState *env = &cpu->env; mcc->parent_reset(s); memset(env, 0, offsetof(CPUMBState, pvr)); env->res_addr = RES_ADDR_NONE; tlb_flush(s, 1); /* Disable stack protector. */ env->shr = ~0; #if defined(CONFIG_USER_ONLY) /* start in user mode with interrupts enabled. */ env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM; #else env->sregs[SR_MSR] = 0; mmu_init(&env->mmu); env->mmu.c_mmu = 3; env->mmu.c_mmu_tlb_access = 3; env->mmu.c_mmu_zones = 16; #endif } static void mb_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev); MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); CPUMBState *env = &cpu->env; qemu_init_vcpu(cs); env->pvr.regs[0] = PVR0_PVR_FULL_MASK \ | PVR0_USE_BARREL_MASK \ | PVR0_USE_DIV_MASK \ | PVR0_USE_HW_MUL_MASK \ | PVR0_USE_EXC_MASK \ | PVR0_USE_ICACHE_MASK \ | PVR0_USE_DCACHE_MASK \ | (0xb << 8); env->pvr.regs[2] = PVR2_D_OPB_MASK \ | PVR2_D_LMB_MASK \ | PVR2_I_OPB_MASK \ | PVR2_I_LMB_MASK \ | PVR2_USE_MSR_INSTR \ | PVR2_USE_PCMP_INSTR \ | PVR2_USE_BARREL_MASK \ | PVR2_USE_DIV_MASK \ | PVR2_USE_HW_MUL_MASK \ | PVR2_USE_MUL64_MASK \ | PVR2_FPU_EXC_MASK \ | 0; env->pvr.regs[0] |= (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) | (cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) | (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) | (cpu->cfg.endi ? PVR0_ENDI_MASK : 0); env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) | (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0); env->pvr.regs[5] |= cpu->cfg.dcache_writeback ? PVR5_DCACHE_WRITEBACK_MASK : 0; env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17); env->sregs[SR_PC] = cpu->cfg.base_vectors; #if defined(CONFIG_USER_ONLY) env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ #endif mcc->parent_realize(dev, errp); } static void mb_cpu_initfn(Object *obj) { CPUState *cs = CPU(obj); MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj); CPUMBState *env = &cpu->env; static bool tcg_initialized; cs->env_ptr = env; cpu_exec_init(env); set_float_rounding_mode(float_round_nearest_even, &env->fp_status); #ifndef CONFIG_USER_ONLY /* Inbound IRQ and FIR lines */ qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2); #endif if (tcg_enabled() && !tcg_initialized) { tcg_initialized = true; mb_tcg_init(); } } static const VMStateDescription vmstate_mb_cpu = { .name = "cpu", .unmigratable = 1, }; static Property mb_properties[] = { DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0), DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot, false), /* If use-fpu > 0 - FPU is enabled * If use-fpu = 2 - Floating point conversion and square root instructions * are enabled */ DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2), DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true), DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback, false), DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false), DEFINE_PROP_END_OF_LIST(), }; static void mb_cpu_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); CPUClass *cc = CPU_CLASS(oc); MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc); mcc->parent_realize = dc->realize; dc->realize = mb_cpu_realizefn; mcc->parent_reset = cc->reset; cc->reset = mb_cpu_reset; cc->has_work = mb_cpu_has_work; cc->do_interrupt = mb_cpu_do_interrupt; cc->cpu_exec_interrupt = mb_cpu_exec_interrupt; cc->dump_state = mb_cpu_dump_state; cc->set_pc = mb_cpu_set_pc; cc->gdb_read_register = mb_cpu_gdb_read_register; cc->gdb_write_register = mb_cpu_gdb_write_register; #ifdef CONFIG_USER_ONLY cc->handle_mmu_fault = mb_cpu_handle_mmu_fault; #else cc->do_unassigned_access = mb_cpu_unassigned_access; cc->get_phys_page_debug = mb_cpu_get_phys_page_debug; #endif dc->vmsd = &vmstate_mb_cpu; dc->props = mb_properties; cc->gdb_num_core_regs = 32 + 5; } static const TypeInfo mb_cpu_type_info = { .name = TYPE_MICROBLAZE_CPU, .parent = TYPE_CPU, .instance_size = sizeof(MicroBlazeCPU), .instance_init = mb_cpu_initfn, .class_size = sizeof(MicroBlazeCPUClass), .class_init = mb_cpu_class_init, }; static void mb_cpu_register_types(void) { type_register_static(&mb_cpu_type_info); } type_init(mb_cpu_register_types)