1 /* 2 * OpenRISC simulator for use as an IIS. 3 * 4 * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> 5 * Feng Gao <gf91597@gmail.com> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "hw/hw.h" 22 #include "hw/boards.h" 23 #include "elf.h" 24 #include "hw/char/serial.h" 25 #include "net/net.h" 26 #include "hw/loader.h" 27 #include "exec/address-spaces.h" 28 #include "sysemu/sysemu.h" 29 #include "hw/sysbus.h" 30 #include "sysemu/qtest.h" 31 32 #define KERNEL_LOAD_ADDR 0x100 33 34 static void main_cpu_reset(void *opaque) 35 { 36 OpenRISCCPU *cpu = opaque; 37 38 cpu_reset(CPU(cpu)); 39 } 40 41 static void openrisc_sim_net_init(MemoryRegion *address_space, 42 hwaddr base, 43 hwaddr descriptors, 44 qemu_irq irq, NICInfo *nd) 45 { 46 DeviceState *dev; 47 SysBusDevice *s; 48 49 dev = qdev_create(NULL, "open_eth"); 50 qdev_set_nic_properties(dev, nd); 51 qdev_init_nofail(dev); 52 53 s = SYS_BUS_DEVICE(dev); 54 sysbus_connect_irq(s, 0, irq); 55 memory_region_add_subregion(address_space, base, 56 sysbus_mmio_get_region(s, 0)); 57 memory_region_add_subregion(address_space, descriptors, 58 sysbus_mmio_get_region(s, 1)); 59 } 60 61 static void cpu_openrisc_load_kernel(ram_addr_t ram_size, 62 const char *kernel_filename, 63 OpenRISCCPU *cpu) 64 { 65 long kernel_size; 66 uint64_t elf_entry; 67 hwaddr entry; 68 69 if (kernel_filename && !qtest_enabled()) { 70 kernel_size = load_elf(kernel_filename, NULL, NULL, 71 &elf_entry, NULL, NULL, 1, EM_OPENRISC, 1); 72 entry = elf_entry; 73 if (kernel_size < 0) { 74 kernel_size = load_uimage(kernel_filename, 75 &entry, NULL, NULL, NULL, NULL); 76 } 77 if (kernel_size < 0) { 78 kernel_size = load_image_targphys(kernel_filename, 79 KERNEL_LOAD_ADDR, 80 ram_size - KERNEL_LOAD_ADDR); 81 entry = KERNEL_LOAD_ADDR; 82 } 83 84 if (kernel_size < 0) { 85 fprintf(stderr, "QEMU: couldn't load the kernel '%s'\n", 86 kernel_filename); 87 exit(1); 88 } 89 cpu->env.pc = entry; 90 } 91 } 92 93 static void openrisc_sim_init(MachineState *machine) 94 { 95 ram_addr_t ram_size = machine->ram_size; 96 const char *cpu_model = machine->cpu_model; 97 const char *kernel_filename = machine->kernel_filename; 98 OpenRISCCPU *cpu = NULL; 99 MemoryRegion *ram; 100 int n; 101 102 if (!cpu_model) { 103 cpu_model = "or1200"; 104 } 105 106 for (n = 0; n < smp_cpus; n++) { 107 cpu = cpu_openrisc_init(cpu_model); 108 if (cpu == NULL) { 109 fprintf(stderr, "Unable to find CPU definition!\n"); 110 exit(1); 111 } 112 qemu_register_reset(main_cpu_reset, cpu); 113 main_cpu_reset(cpu); 114 } 115 116 ram = g_malloc(sizeof(*ram)); 117 memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal); 118 vmstate_register_ram_global(ram); 119 memory_region_add_subregion(get_system_memory(), 0, ram); 120 121 cpu_openrisc_pic_init(cpu); 122 cpu_openrisc_clock_init(cpu); 123 124 serial_mm_init(get_system_memory(), 0x90000000, 0, cpu->env.irq[2], 125 115200, serial_hds[0], DEVICE_NATIVE_ENDIAN); 126 127 if (nd_table[0].used) { 128 openrisc_sim_net_init(get_system_memory(), 0x92000000, 129 0x92000400, cpu->env.irq[4], nd_table); 130 } 131 132 cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu); 133 } 134 135 static void openrisc_sim_machine_init(MachineClass *mc) 136 { 137 mc->desc = "or32 simulation"; 138 mc->init = openrisc_sim_init; 139 mc->max_cpus = 1; 140 mc->is_default = 1; 141 } 142 143 DEFINE_MACHINE("or32-sim", openrisc_sim_machine_init) 144