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/reset.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 #include "xtensa_memory.h"
  40 #include "xtensa_sim.h"
  41
  42 static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
  43 {
  44     XtensaCPU *cpu = opaque;
  45
  46     return cpu_get_phys_page_debug(CPU(cpu), addr);
  47 }
  48
  49 static void sim_reset(void *opaque)
  50 {
  51     XtensaCPU *cpu = opaque;
  52
  53     cpu_reset(CPU(cpu));
  54 }
  55
  56 XtensaCPU *xtensa_sim_common_init(MachineState *machine)
  57 {
  58     XtensaCPU *cpu = NULL;
  59     CPUXtensaState *env = NULL;
  60     ram_addr_t ram_size = machine->ram_size;
  61     int n;
  62
  63     for (n = 0; n < machine->smp.cpus; n++) {
  64         cpu = XTENSA_CPU(cpu_create(machine->cpu_type));
  65         env = &cpu->env;
  66
  67         env->sregs[PRID] = n;
  68         qemu_register_reset(sim_reset, cpu);
  69         /* Need MMU initialized prior to ELF loading,
  70          * so that ELF gets loaded into virtual addresses
  71          */
  72         sim_reset(cpu);
  73     }
  74
  75     if (env) {
  76         XtensaMemory sysram = env->config->sysram;
  77
  78         sysram.location[0].size = ram_size;
  79         xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom",
  80                                      get_system_memory());
  81         xtensa_create_memory_regions(&env->config->instram, "xtensa.instram",
  82                                      get_system_memory());
  83         xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom",
  84                                      get_system_memory());
  85         xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram",
  86                                      get_system_memory());
  87         xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom",
  88                                      get_system_memory());
  89         xtensa_create_memory_regions(&sysram, "xtensa.sysram",
  90                                      get_system_memory());
  91     }
  92     if (serial_hd(0)) {
  93         xtensa_sim_open_console(serial_hd(0));
  94     }
  95     return cpu;
  96 }
  97
  98 void xtensa_sim_load_kernel(XtensaCPU *cpu, MachineState *machine)
  99 {
 100     const char *kernel_filename = machine->kernel_filename;
 101 #ifdef TARGET_WORDS_BIGENDIAN
 102     int big_endian = true;
 103 #else
 104     int big_endian = false;
 105 #endif
 106
 107     if (kernel_filename) {
 108         uint64_t elf_entry;
 109         uint64_t elf_lowaddr;
 110         int success = load_elf(kernel_filename, NULL, translate_phys_addr, cpu,
 111                                &elf_entry, &elf_lowaddr, NULL, NULL, big_endian,
 112                                EM_XTENSA, 0, 0);
 113
 114         if (success > 0) {
 115             cpu->env.pc = elf_entry;
 116         }
 117     }
 118 }
 119
 120 static void xtensa_sim_init(MachineState *machine)
 121 {
 122     XtensaCPU *cpu = xtensa_sim_common_init(machine);
 123
 124     xtensa_sim_load_kernel(cpu, machine);
 125 }
 126
 127 static void xtensa_sim_machine_init(MachineClass *mc)
 128 {
 129     mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")";
 130     mc->is_default = true;
 131     mc->init = xtensa_sim_init;
 132     mc->max_cpus = 4;
 133     mc->no_serial = 1;
 134     mc->default_cpu_type = XTENSA_DEFAULT_CPU_TYPE;
 135 }
 136
 137 DEFINE_MACHINE("sim", xtensa_sim_machine_init)