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
  36 static 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
  43 static void sim_reset(void *opaque)
  44 {
  45     XtensaCPU *cpu = opaque;
  46
  47     cpu_reset(CPU(cpu));
  48 }
  49
  50 static 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'",
  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, &error_abort);
  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, &error_abort);
  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
 107 static 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
 115 static void xtensa_sim_machine_init(void)
 116 {
 117     qemu_register_machine(&xtensa_sim_machine);
 118 }
 119
 120 machine_init(xtensa_sim_machine_init);