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 char *num_name = malloc(strlen(name) + sizeof(i) * 3 + 1); 45 46 for (i = 0; i < memory->num; ++i) { 47 MemoryRegion *m; 48 49 sprintf(num_name, "%s%u", name, i); 50 m = g_malloc(sizeof(*m)); 51 memory_region_init_ram(m, NULL, num_name, 52 memory->location[i].size, 53 &error_fatal); 54 vmstate_register_ram_global(m); 55 memory_region_add_subregion(get_system_memory(), 56 memory->location[i].addr, m); 57 } 58 free(num_name); 59 } 60 61 static uint64_t translate_phys_addr(void *opaque, uint64_t addr) 62 { 63 XtensaCPU *cpu = opaque; 64 65 return cpu_get_phys_page_debug(CPU(cpu), addr); 66 } 67 68 static void sim_reset(void *opaque) 69 { 70 XtensaCPU *cpu = opaque; 71 72 cpu_reset(CPU(cpu)); 73 } 74 75 static void xtensa_sim_init(MachineState *machine) 76 { 77 XtensaCPU *cpu = NULL; 78 CPUXtensaState *env = NULL; 79 ram_addr_t ram_size = machine->ram_size; 80 const char *cpu_model = machine->cpu_model; 81 const char *kernel_filename = machine->kernel_filename; 82 int n; 83 84 if (!cpu_model) { 85 cpu_model = XTENSA_DEFAULT_CPU_MODEL; 86 } 87 88 for (n = 0; n < smp_cpus; n++) { 89 cpu = cpu_xtensa_init(cpu_model); 90 if (cpu == NULL) { 91 error_report("unable to find CPU definition '%s'", 92 cpu_model); 93 exit(EXIT_FAILURE); 94 } 95 env = &cpu->env; 96 97 env->sregs[PRID] = n; 98 qemu_register_reset(sim_reset, cpu); 99 /* Need MMU initialized prior to ELF loading, 100 * so that ELF gets loaded into virtual addresses 101 */ 102 sim_reset(cpu); 103 } 104 105 if (env) { 106 XtensaMemory sysram = env->config->sysram; 107 108 sysram.location[0].size = ram_size; 109 xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom"); 110 xtensa_create_memory_regions(&env->config->instram, "xtensa.instram"); 111 xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom"); 112 xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram"); 113 xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom"); 114 xtensa_create_memory_regions(&sysram, "xtensa.sysram"); 115 } 116 117 if (kernel_filename) { 118 uint64_t elf_entry; 119 uint64_t elf_lowaddr; 120 #ifdef TARGET_WORDS_BIGENDIAN 121 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 122 &elf_entry, &elf_lowaddr, NULL, 1, EM_XTENSA, 0, 0); 123 #else 124 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 125 &elf_entry, &elf_lowaddr, NULL, 0, EM_XTENSA, 0, 0); 126 #endif 127 if (success > 0) { 128 env->pc = elf_entry; 129 } 130 } 131 } 132 133 static void xtensa_sim_machine_init(MachineClass *mc) 134 { 135 mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")"; 136 mc->is_default = true; 137 mc->init = xtensa_sim_init; 138 mc->max_cpus = 4; 139 } 140 141 DEFINE_MACHINE("sim", xtensa_sim_machine_init) 142