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