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