LXR qemu/hw/xtensa/sim.c

   1/*
   2 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
   3 * All rights reserved.
   4 *
   5 * Redistribution and use in source and binary forms, with or without
   6 * modification, are permitted provided that the following conditions are met:
   7 *     * Redistributions of source code must retain the above copyright
   8 *       notice, this list of conditions and the following disclaimer.
   9 *     * Redistributions in binary form must reproduce the above copyright
  10 *       notice, this list of conditions and the following disclaimer in the
  11 *       documentation and/or other materials provided with the distribution.
  12 *     * Neither the name of the Open Source and Linux Lab nor the
  13 *       names of its contributors may be used to endorse or promote products
  14 *       derived from this software without specific prior written permission.
  15 *
  16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 */
  27
  28#include "qemu/osdep.h"
  29#include "qapi/error.h"
  30#include "cpu.h"
  31#include "sysemu/sysemu.h"
  32#include "hw/boards.h"
  33#include "hw/loader.h"
  34#include "elf.h"
  35#include "exec/memory.h"
  36#include "exec/address-spaces.h"
  37#include "qemu/error-report.h"
  38#include "xtensa_memory.h"
  39
  40static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
  41{
  42    XtensaCPU *cpu = opaque;
  43
  44    return cpu_get_phys_page_debug(CPU(cpu), addr);
  45}
  46
  47static void sim_reset(void *opaque)
  48{
  49    XtensaCPU *cpu = opaque;
  50
  51    cpu_reset(CPU(cpu));
  52}
  53
  54static void xtensa_sim_init(MachineState *machine)
  55{
  56    XtensaCPU *cpu = NULL;
  57    CPUXtensaState *env = NULL;
  58    ram_addr_t ram_size = machine->ram_size;
  59    const char *kernel_filename = machine->kernel_filename;
  60    int n;
  61
  62    for (n = 0; n < machine->smp.cpus; n++) {
  63        cpu = XTENSA_CPU(cpu_create(machine->cpu_type));
  64        env = &cpu->env;
  65
  66        env->sregs[PRID] = n;
  67        qemu_register_reset(sim_reset, cpu);
  68        /* Need MMU initialized prior to ELF loading,
  69         * so that ELF gets loaded into virtual addresses
  70         */
  71        sim_reset(cpu);
  72    }
  73
  74    if (env) {
  75        XtensaMemory sysram = env->config->sysram;
  76
  77        sysram.location[0].size = ram_size;
  78        xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom",
  79                                     get_system_memory());
  80        xtensa_create_memory_regions(&env->config->instram, "xtensa.instram",
  81                                     get_system_memory());
  82        xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom",
  83                                     get_system_memory());
  84        xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram",
  85                                     get_system_memory());
  86        xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom",
  87                                     get_system_memory());
  88        xtensa_create_memory_regions(&sysram, "xtensa.sysram",
  89                                     get_system_memory());
  90    }
  91
  92    if (serial_hd(0)) {
  93        xtensa_sim_open_console(serial_hd(0));
  94    }
  95    if (kernel_filename) {
  96        uint64_t elf_entry;
  97        uint64_t elf_lowaddr;
  98#ifdef TARGET_WORDS_BIGENDIAN
  99        int success = load_elf(kernel_filename, NULL,
 100                               translate_phys_addr, cpu,
 101                               &elf_entry, &elf_lowaddr,
 102                               NULL, 1, EM_XTENSA, 0, 0);
 103#else
 104        int success = load_elf(kernel_filename, NULL,
 105                               translate_phys_addr, cpu,
 106                               &elf_entry, &elf_lowaddr,
 107                               NULL, 0, EM_XTENSA, 0, 0);
 108#endif
 109        if (success > 0) {
 110            env->pc = elf_entry;
 111        }
 112    }
 113}
 114
 115static void xtensa_sim_machine_init(MachineClass *mc)
 116{
 117    mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")";
 118    mc->is_default = true;
 119    mc->init = xtensa_sim_init;
 120    mc->max_cpus = 4;
 121    mc->no_serial = 1;
 122    mc->default_cpu_type = XTENSA_DEFAULT_CPU_TYPE;
 123}
 124
 125DEFINE_MACHINE("sim", xtensa_sim_machine_init)
 126