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 "sysemu/sysemu.h" 29 #include "hw/boards.h" 30 #include "hw/loader.h" 31 #include "elf.h" 32 #include "exec/memory.h" 33 #include "exec/address-spaces.h" 34 #include "qemu/error-report.h" 35 36 static uint64_t translate_phys_addr(void *opaque, uint64_t addr) 37 { 38 XtensaCPU *cpu = opaque; 39 40 return cpu_get_phys_page_debug(CPU(cpu), addr); 41 } 42 43 static void sim_reset(void *opaque) 44 { 45 XtensaCPU *cpu = opaque; 46 47 cpu_reset(CPU(cpu)); 48 } 49 50 static void xtensa_sim_init(MachineState *machine) 51 { 52 XtensaCPU *cpu = NULL; 53 CPUXtensaState *env = NULL; 54 MemoryRegion *ram, *rom; 55 ram_addr_t ram_size = machine->ram_size; 56 const char *cpu_model = machine->cpu_model; 57 const char *kernel_filename = machine->kernel_filename; 58 int n; 59 60 if (!cpu_model) { 61 cpu_model = XTENSA_DEFAULT_CPU_MODEL; 62 } 63 64 for (n = 0; n < smp_cpus; n++) { 65 cpu = cpu_xtensa_init(cpu_model); 66 if (cpu == NULL) { 67 error_report("unable to find CPU definition '%s'", 68 cpu_model); 69 exit(EXIT_FAILURE); 70 } 71 env = &cpu->env; 72 73 env->sregs[PRID] = n; 74 qemu_register_reset(sim_reset, cpu); 75 /* Need MMU initialized prior to ELF loading, 76 * so that ELF gets loaded into virtual addresses 77 */ 78 sim_reset(cpu); 79 } 80 81 ram = g_malloc(sizeof(*ram)); 82 memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size, &error_fatal); 83 vmstate_register_ram_global(ram); 84 memory_region_add_subregion(get_system_memory(), 0, ram); 85 86 rom = g_malloc(sizeof(*rom)); 87 memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000, &error_fatal); 88 vmstate_register_ram_global(rom); 89 memory_region_add_subregion(get_system_memory(), 0xfe000000, rom); 90 91 if (kernel_filename) { 92 uint64_t elf_entry; 93 uint64_t elf_lowaddr; 94 #ifdef TARGET_WORDS_BIGENDIAN 95 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 96 &elf_entry, &elf_lowaddr, NULL, 1, EM_XTENSA, 0); 97 #else 98 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 99 &elf_entry, &elf_lowaddr, NULL, 0, EM_XTENSA, 0); 100 #endif 101 if (success > 0) { 102 env->pc = elf_entry; 103 } 104 } 105 } 106 107 static void xtensa_sim_machine_init(MachineClass *mc) 108 { 109 mc->desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")"; 110 mc->is_default = true; 111 mc->init = xtensa_sim_init; 112 mc->max_cpus = 4; 113 } 114 115 DEFINE_MACHINE("sim", xtensa_sim_machine_init) 116