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 "sysemu/sysemu.h" 30 #include "hw/boards.h" 31 #include "hw/loader.h" 32 #include "elf.h" 33 #include "exec/memory.h" 34 #include "exec/address-spaces.h" 35 #include "qemu/error-report.h" 36 37 static uint64_t translate_phys_addr(void *opaque, uint64_t addr) 38 { 39 XtensaCPU *cpu = opaque; 40 41 return cpu_get_phys_page_debug(CPU(cpu), addr); 42 } 43 44 static void sim_reset(void *opaque) 45 { 46 XtensaCPU *cpu = opaque; 47 48 cpu_reset(CPU(cpu)); 49 } 50 51 static void xtensa_sim_init(MachineState *machine) 52 { 53 XtensaCPU *cpu = NULL; 54 CPUXtensaState *env = NULL; 55 MemoryRegion *ram, *rom; 56 ram_addr_t ram_size = machine->ram_size; 57 const char *cpu_model = machine->cpu_model; 58 const char *kernel_filename = machine->kernel_filename; 59 int n; 60 61 if (!cpu_model) { 62 cpu_model = XTENSA_DEFAULT_CPU_MODEL; 63 } 64 65 for (n = 0; n < smp_cpus; n++) { 66 cpu = cpu_xtensa_init(cpu_model); 67 if (cpu == NULL) { 68 error_report("unable to find CPU definition '%s'", 69 cpu_model); 70 exit(EXIT_FAILURE); 71 } 72 env = &cpu->env; 73 74 env->sregs[PRID] = n; 75 qemu_register_reset(sim_reset, cpu); 76 /* Need MMU initialized prior to ELF loading, 77 * so that ELF gets loaded into virtual addresses 78 */ 79 sim_reset(cpu); 80 } 81 82 ram = g_malloc(sizeof(*ram)); 83 memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size, &error_fatal); 84 vmstate_register_ram_global(ram); 85 memory_region_add_subregion(get_system_memory(), 0, ram); 86 87 rom = g_malloc(sizeof(*rom)); 88 memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000, &error_fatal); 89 vmstate_register_ram_global(rom); 90 memory_region_add_subregion(get_system_memory(), 0xfe000000, rom); 91 92 if (kernel_filename) { 93 uint64_t elf_entry; 94 uint64_t elf_lowaddr; 95 #ifdef TARGET_WORDS_BIGENDIAN 96 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 97 &elf_entry, &elf_lowaddr, NULL, 1, EM_XTENSA, 0, 0); 98 #else 99 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 100 &elf_entry, &elf_lowaddr, NULL, 0, EM_XTENSA, 0, 0); 101 #endif 102 if (success > 0) { 103 env->pc = elf_entry; 104 } 105 } 106 } 107 108 static void xtensa_sim_machine_init(MachineClass *mc) 109 { 110 mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")"; 111 mc->is_default = true; 112 mc->init = xtensa_sim_init; 113 mc->max_cpus = 4; 114 } 115 116 DEFINE_MACHINE("sim", xtensa_sim_machine_init) 117