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 *kernel_filename = machine->kernel_filename; 79 int n; 80 81 for (n = 0; n < smp_cpus; n++) { 82 cpu = XTENSA_CPU(cpu_create(machine->cpu_type)); 83 env = &cpu->env; 84 85 env->sregs[PRID] = n; 86 qemu_register_reset(sim_reset, cpu); 87 /* Need MMU initialized prior to ELF loading, 88 * so that ELF gets loaded into virtual addresses 89 */ 90 sim_reset(cpu); 91 } 92 93 if (env) { 94 XtensaMemory sysram = env->config->sysram; 95 96 sysram.location[0].size = ram_size; 97 xtensa_create_memory_regions(&env->config->instrom, "xtensa.instrom"); 98 xtensa_create_memory_regions(&env->config->instram, "xtensa.instram"); 99 xtensa_create_memory_regions(&env->config->datarom, "xtensa.datarom"); 100 xtensa_create_memory_regions(&env->config->dataram, "xtensa.dataram"); 101 xtensa_create_memory_regions(&env->config->sysrom, "xtensa.sysrom"); 102 xtensa_create_memory_regions(&sysram, "xtensa.sysram"); 103 } 104 105 if (serial_hds[0]) { 106 xtensa_sim_open_console(serial_hds[0]); 107 } 108 if (kernel_filename) { 109 uint64_t elf_entry; 110 uint64_t elf_lowaddr; 111 #ifdef TARGET_WORDS_BIGENDIAN 112 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 113 &elf_entry, &elf_lowaddr, NULL, 1, EM_XTENSA, 0, 0); 114 #else 115 int success = load_elf(kernel_filename, translate_phys_addr, cpu, 116 &elf_entry, &elf_lowaddr, NULL, 0, EM_XTENSA, 0, 0); 117 #endif 118 if (success > 0) { 119 env->pc = elf_entry; 120 } 121 } 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