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