LXR qemu/target/tilegx/cpu.c

   1/*
   2 * QEMU TILE-Gx CPU
   3 *
   4 *  Copyright (c) 2015 Chen Gang
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see
  18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qapi/error.h"
  23#include "cpu.h"
  24#include "qemu/module.h"
  25#include "linux-user/syscall_defs.h"
  26#include "qemu/qemu-print.h"
  27#include "exec/exec-all.h"
  28
  29static void tilegx_cpu_dump_state(CPUState *cs, FILE *f, int flags)
  30{
  31    static const char * const reg_names[TILEGX_R_COUNT] = {
  32         "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
  33         "r8",  "r9", "r10", "r11", "r12", "r13", "r14", "r15",
  34        "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
  35        "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
  36        "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
  37        "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
  38        "r48", "r49", "r50", "r51",  "bp",  "tp",  "sp",  "lr"
  39    };
  40
  41    TileGXCPU *cpu = TILEGX_CPU(cs);
  42    CPUTLGState *env = &cpu->env;
  43    int i;
  44
  45    for (i = 0; i < TILEGX_R_COUNT; i++) {
  46        qemu_fprintf(f, "%-4s" TARGET_FMT_lx "%s",
  47                     reg_names[i], env->regs[i],
  48                     (i % 4) == 3 ? "\n" : " ");
  49    }
  50    qemu_fprintf(f, "PC  " TARGET_FMT_lx " CEX " TARGET_FMT_lx "\n\n",
  51                 env->pc, env->spregs[TILEGX_SPR_CMPEXCH]);
  52}
  53
  54static ObjectClass *tilegx_cpu_class_by_name(const char *cpu_model)
  55{
  56    return object_class_by_name(TYPE_TILEGX_CPU);
  57}
  58
  59static void tilegx_cpu_set_pc(CPUState *cs, vaddr value)
  60{
  61    TileGXCPU *cpu = TILEGX_CPU(cs);
  62
  63    cpu->env.pc = value;
  64}
  65
  66static bool tilegx_cpu_has_work(CPUState *cs)
  67{
  68    return true;
  69}
  70
  71static void tilegx_cpu_reset(CPUState *s)
  72{
  73    TileGXCPU *cpu = TILEGX_CPU(s);
  74    TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu);
  75    CPUTLGState *env = &cpu->env;
  76
  77    tcc->parent_reset(s);
  78
  79    memset(env, 0, offsetof(CPUTLGState, end_reset_fields));
  80}
  81
  82static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp)
  83{
  84    CPUState *cs = CPU(dev);
  85    TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(dev);
  86    Error *local_err = NULL;
  87
  88    cpu_exec_realizefn(cs, &local_err);
  89    if (local_err != NULL) {
  90        error_propagate(errp, local_err);
  91        return;
  92    }
  93
  94    cpu_reset(cs);
  95    qemu_init_vcpu(cs);
  96
  97    tcc->parent_realize(dev, errp);
  98}
  99
 100static void tilegx_cpu_initfn(Object *obj)
 101{
 102    TileGXCPU *cpu = TILEGX_CPU(obj);
 103
 104    cpu_set_cpustate_pointers(cpu);
 105}
 106
 107static void tilegx_cpu_do_interrupt(CPUState *cs)
 108{
 109    cs->exception_index = -1;
 110}
 111
 112static bool tilegx_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 113                                MMUAccessType access_type, int mmu_idx,
 114                                bool probe, uintptr_t retaddr)
 115{
 116    TileGXCPU *cpu = TILEGX_CPU(cs);
 117
 118    /* The sigcode field will be filled in by do_signal in main.c.  */
 119    cs->exception_index = TILEGX_EXCP_SIGNAL;
 120    cpu->env.excaddr = address;
 121    cpu->env.signo = TARGET_SIGSEGV;
 122    cpu->env.sigcode = 0;
 123
 124    cpu_loop_exit_restore(cs, retaddr);
 125}
 126
 127static bool tilegx_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 128{
 129    if (interrupt_request & CPU_INTERRUPT_HARD) {
 130        tilegx_cpu_do_interrupt(cs);
 131        return true;
 132    }
 133    return false;
 134}
 135
 136static void tilegx_cpu_class_init(ObjectClass *oc, void *data)
 137{
 138    DeviceClass *dc = DEVICE_CLASS(oc);
 139    CPUClass *cc = CPU_CLASS(oc);
 140    TileGXCPUClass *tcc = TILEGX_CPU_CLASS(oc);
 141
 142    device_class_set_parent_realize(dc, tilegx_cpu_realizefn,
 143                                    &tcc->parent_realize);
 144
 145    tcc->parent_reset = cc->reset;
 146    cc->reset = tilegx_cpu_reset;
 147
 148    cc->class_by_name = tilegx_cpu_class_by_name;
 149    cc->has_work = tilegx_cpu_has_work;
 150    cc->do_interrupt = tilegx_cpu_do_interrupt;
 151    cc->cpu_exec_interrupt = tilegx_cpu_exec_interrupt;
 152    cc->dump_state = tilegx_cpu_dump_state;
 153    cc->set_pc = tilegx_cpu_set_pc;
 154    cc->tlb_fill = tilegx_cpu_tlb_fill;
 155    cc->gdb_num_core_regs = 0;
 156    cc->tcg_initialize = tilegx_tcg_init;
 157}
 158
 159static const TypeInfo tilegx_cpu_type_info = {
 160    .name = TYPE_TILEGX_CPU,
 161    .parent = TYPE_CPU,
 162    .instance_size = sizeof(TileGXCPU),
 163    .instance_init = tilegx_cpu_initfn,
 164    .class_size = sizeof(TileGXCPUClass),
 165    .class_init = tilegx_cpu_class_init,
 166};
 167
 168static void tilegx_cpu_register_types(void)
 169{
 170    type_register_static(&tilegx_cpu_type_info);
 171}
 172
 173type_init(tilegx_cpu_register_types)
 174