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