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 *cpu_model = machine->cpu_model; 79 const char *kernel_filename = machine->kernel_filename; 80 int n; 81 82 if (!cpu_model) { 83 cpu_model = XTENSA_DEFAULT_CPU_MODEL; 84 } 85 86 for (n = 0; n < smp_cpus; n++) { 87 cpu = XTENSA_CPU(cpu_generic_init(TYPE_XTENSA_CPU, cpu_model)); 88 if (cpu == NULL) { 89 error_report("unable to find CPU definition '%s'", 90 cpu_model); 91 exit(EXIT_FAILURE); 92 } 93 env = &cpu->env; 94 95 env->sregs[PRID] = n; 96 qemu_register_reset(sim_reset, cpu); 97 /* Need MMU initialized prior to ELF loading, 98 * so that ELF gets loaded into virtual addresses 99 */ 100 sim_reset(cpu); 101 } 102 103 if (env) { 104 XtensaMemory sysram = env->config->sysram; 105 106 sysram.location[0].size = ram_size; 107 xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom"); 108 xtensa_create_memory_regions(&env->config->instram, "xtensa.instram"); 109 xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom"); 110 xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram"); 111 xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom"); 112 xtensa_create_memory_regions(&sysram, "xtensa.sysram"); 113 } 114 115 if (serial_hds[0]) { 116 xtensa_sim_open_console(serial_hds[0]); 117 } 118 if (kernel_filename) { 119 uint64_t elf_entry; 120 uint64_t elf_lowaddr; 121 #ifdef TARGET_WORDS_BIGENDIAN 122 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 123 &elf_entry, &elf_lowaddr, NULL, 1, EM_XTENSA, 0, 0); 124 #else 125 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 126 &elf_entry, &elf_lowaddr, NULL, 0, EM_XTENSA, 0, 0); 127 #endif 128 if (success > 0) { 129 env->pc = elf_entry; 130 } 131 } 132 } 133 134 static void xtensa_sim_machine_init(MachineClass *mc) 135 { 136 mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")"; 137 mc->is_default = true; 138 mc->init = xtensa_sim_init; 139 mc->max_cpus = 4; 140 mc->no_serial = 1; 141 } 142 143 DEFINE_MACHINE("sim", xtensa_sim_machine_init) 144