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 "sysemu/sysemu.h"
  29#include "hw/boards.h"
  30#include "hw/loader.h"
  31#include "elf.h"
  32#include "exec/memory.h"
  33#include "exec/address-spaces.h"
  34#include "qemu/error-report.h"
  35
  36static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
  37{
  38    XtensaCPU *cpu = opaque;
  39
  40    return cpu_get_phys_page_debug(CPU(cpu), addr);
  41}
  42
  43static void sim_reset(void *opaque)
  44{
  45    XtensaCPU *cpu = opaque;
  46
  47    cpu_reset(CPU(cpu));
  48}
  49
  50static void xtensa_sim_init(MachineState *machine)
  51{
  52    XtensaCPU *cpu = NULL;
  53    CPUXtensaState *env = NULL;
  54    MemoryRegion *ram, *rom;
  55    ram_addr_t ram_size = machine->ram_size;
  56    const char *cpu_model = machine->cpu_model;
  57    const char *kernel_filename = machine->kernel_filename;
  58    int n;
  59
  60    if (!cpu_model) {
  61        cpu_model = XTENSA_DEFAULT_CPU_MODEL;
  62    }
  63
  64    for (n = 0; n < smp_cpus; n++) {
  65        cpu = cpu_xtensa_init(cpu_model);
  66        if (cpu == NULL) {
  67            error_report("unable to find CPU definition '%s'\n",
  68                         cpu_model);
  69            exit(EXIT_FAILURE);
  70        }
  71        env = &cpu->env;
  72
  73        env->sregs[PRID] = n;
  74        qemu_register_reset(sim_reset, cpu);
  75        /* Need MMU initialized prior to ELF loading,
  76         * so that ELF gets loaded into virtual addresses
  77         */
  78        sim_reset(cpu);
  79    }
  80
  81    ram = g_malloc(sizeof(*ram));
  82    memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size);
  83    vmstate_register_ram_global(ram);
  84    memory_region_add_subregion(get_system_memory(), 0, ram);
  85
  86    rom = g_malloc(sizeof(*rom));
  87    memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000);
  88    vmstate_register_ram_global(rom);
  89    memory_region_add_subregion(get_system_memory(), 0xfe000000, rom);
  90
  91    if (kernel_filename) {
  92        uint64_t elf_entry;
  93        uint64_t elf_lowaddr;
  94#ifdef TARGET_WORDS_BIGENDIAN
  95        int success = load_elf(kernel_filename, translate_phys_addr, cpu,
  96                &elf_entry, &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
  97#else
  98        int success = load_elf(kernel_filename, translate_phys_addr, cpu,
  99                &elf_entry, &elf_lowaddr, NULL, 0, ELF_MACHINE, 0);
 100#endif
 101        if (success > 0) {
 102            env->pc = elf_entry;
 103        }
 104    }
 105}
 106
 107static QEMUMachine xtensa_sim_machine = {
 108    .name = "sim",
 109    .desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")",
 110    .is_default = true,
 111    .init = xtensa_sim_init,
 112    .max_cpus = 4,
 113};
 114
 115static void xtensa_sim_machine_init(void)
 116{
 117    qemu_register_machine(&xtensa_sim_machine);
 118}
 119
 120machine_init(xtensa_sim_machine_init);
 121