qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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sim.c (4717B)

      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 #if TARGET_BIG_ENDIAN
    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)