/* * QEMU TILE-Gx CPU * * Copyright (c) 2015 Chen Gang * * 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 "cpu.h" #include "qemu-common.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "linux-user/syscall_defs.h" static void tilegx_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf, int flags) { static const char * const reg_names[TILEGX_R_COUNT] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", "r48", "r49", "r50", "r51", "bp", "tp", "sp", "lr" }; TileGXCPU *cpu = TILEGX_CPU(cs); CPUTLGState *env = &cpu->env; int i; for (i = 0; i < TILEGX_R_COUNT; i++) { cpu_fprintf(f, "%-4s" TARGET_FMT_lx "%s", reg_names[i], env->regs[i], (i % 4) == 3 ? "\n" : " "); } cpu_fprintf(f, "PC " TARGET_FMT_lx " CEX " TARGET_FMT_lx "\n\n", env->pc, env->spregs[TILEGX_SPR_CMPEXCH]); } TileGXCPU *cpu_tilegx_init(const char *cpu_model) { TileGXCPU *cpu; cpu = TILEGX_CPU(object_new(TYPE_TILEGX_CPU)); object_property_set_bool(OBJECT(cpu), true, "realized", NULL); return cpu; } static void tilegx_cpu_set_pc(CPUState *cs, vaddr value) { TileGXCPU *cpu = TILEGX_CPU(cs); cpu->env.pc = value; } static bool tilegx_cpu_has_work(CPUState *cs) { return true; } static void tilegx_cpu_reset(CPUState *s) { TileGXCPU *cpu = TILEGX_CPU(s); TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu); CPUTLGState *env = &cpu->env; tcc->parent_reset(s); memset(env, 0, sizeof(CPUTLGState)); tlb_flush(s, 1); } static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(dev); cpu_reset(cs); qemu_init_vcpu(cs); tcc->parent_realize(dev, errp); } static void tilegx_cpu_initfn(Object *obj) { CPUState *cs = CPU(obj); TileGXCPU *cpu = TILEGX_CPU(obj); CPUTLGState *env = &cpu->env; static bool tcg_initialized; cs->env_ptr = env; cpu_exec_init(cs, &error_abort); if (tcg_enabled() && !tcg_initialized) { tcg_initialized = true; tilegx_tcg_init(); } } static void tilegx_cpu_do_interrupt(CPUState *cs) { cs->exception_index = -1; } static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int mmu_idx) { TileGXCPU *cpu = TILEGX_CPU(cs); /* The sigcode field will be filled in by do_signal in main.c. */ cs->exception_index = TILEGX_EXCP_SIGNAL; cpu->env.excaddr = address; cpu->env.signo = TARGET_SIGSEGV; cpu->env.sigcode = 0; return 1; } static bool tilegx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) { if (interrupt_request & CPU_INTERRUPT_HARD) { tilegx_cpu_do_interrupt(cs); return true; } return false; } static void tilegx_cpu_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); CPUClass *cc = CPU_CLASS(oc); TileGXCPUClass *tcc = TILEGX_CPU_CLASS(oc); tcc->parent_realize = dc->realize; dc->realize = tilegx_cpu_realizefn; tcc->parent_reset = cc->reset; cc->reset = tilegx_cpu_reset; cc->has_work = tilegx_cpu_has_work; cc->do_interrupt = tilegx_cpu_do_interrupt; cc->cpu_exec_interrupt = tilegx_cpu_exec_interrupt; cc->dump_state = tilegx_cpu_dump_state; cc->set_pc = tilegx_cpu_set_pc; cc->handle_mmu_fault = tilegx_cpu_handle_mmu_fault; cc->gdb_num_core_regs = 0; /* * Reason: tilegx_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 tilegx_cpu_type_info = { .name = TYPE_TILEGX_CPU, .parent = TYPE_CPU, .instance_size = sizeof(TileGXCPU), .instance_init = tilegx_cpu_initfn, .class_size = sizeof(TileGXCPUClass), .class_init = tilegx_cpu_class_init, }; static void tilegx_cpu_register_types(void) { type_register_static(&tilegx_cpu_type_info); } type_init(tilegx_cpu_register_types)