xref: /openbmc/qemu/hw/xtensa/sim.c (revision 2c316f9af4752369ac86be85cd8846d6365e4e68)
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 "sysemu/reset.h"
31  #include "sysemu/sysemu.h"
32  #include "hw/boards.h"
33  #include "hw/loader.h"
34  #include "elf.h"
35  #include "exec/memory.h"
36  #include "qemu/error-report.h"
37  #include "xtensa_memory.h"
38  #include "xtensa_sim.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  XtensaCPU *xtensa_sim_common_init(MachineState *machine)
55  {
56      XtensaCPU *cpu = NULL;
57      CPUXtensaState *env = NULL;
58      ram_addr_t ram_size = machine->ram_size;
59      int n;
60  
61      for (n = 0; n < machine->smp.cpus; n++) {
62          cpu = XTENSA_CPU(cpu_create(machine->cpu_type));
63          env = &cpu->env;
64  
65          env->sregs[PRID] = n;
66          qemu_register_reset(sim_reset, cpu);
67          /* Need MMU initialized prior to ELF loading,
68           * so that ELF gets loaded into virtual addresses
69           */
70          sim_reset(cpu);
71      }
72  
73      if (env) {
74          XtensaMemory sysram = env->config->sysram;
75  
76          sysram.location[0].size = ram_size;
77          xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom",
78                                       get_system_memory());
79          xtensa_create_memory_regions(&env->config->instram, "xtensa.instram",
80                                       get_system_memory());
81          xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom",
82                                       get_system_memory());
83          xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram",
84                                       get_system_memory());
85          xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom",
86                                       get_system_memory());
87          xtensa_create_memory_regions(&sysram, "xtensa.sysram",
88                                       get_system_memory());
89      }
90      if (serial_hd(0)) {
91          xtensa_sim_open_console(serial_hd(0));
92      }
93      return cpu;
94  }
95  
96  void xtensa_sim_load_kernel(XtensaCPU *cpu, MachineState *machine)
97  {
98      const char *kernel_filename = machine->kernel_filename;
99  #ifdef TARGET_WORDS_BIGENDIAN
100      int big_endian = true;
101  #else
102      int big_endian = false;
103  #endif
104  
105      if (kernel_filename) {
106          uint64_t elf_entry;
107          int success = load_elf(kernel_filename, NULL, translate_phys_addr, cpu,
108                                 &elf_entry, NULL, NULL, NULL, big_endian,
109                                 EM_XTENSA, 0, 0);
110  
111          if (success > 0) {
112              cpu->env.pc = elf_entry;
113          }
114      }
115  }
116  
117  static void xtensa_sim_init(MachineState *machine)
118  {
119      XtensaCPU *cpu = xtensa_sim_common_init(machine);
120  
121      xtensa_sim_load_kernel(cpu, machine);
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)
135