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 "qemu/osdep.h" 22 #include "qemu/error-report.h" 23 #include "qapi/error.h" 24 #include "qemu-common.h" 25 #include "cpu.h" 26 #include "hw/hw.h" 27 #include "hw/boards.h" 28 #include "elf.h" 29 #include "hw/char/serial.h" 30 #include "net/net.h" 31 #include "hw/loader.h" 32 #include "exec/address-spaces.h" 33 #include "sysemu/sysemu.h" 34 #include "hw/sysbus.h" 35 #include "sysemu/qtest.h" 36 37 #define KERNEL_LOAD_ADDR 0x100 38 39 static struct openrisc_boot_info { 40 uint32_t bootstrap_pc; 41 } boot_info; 42 43 static void main_cpu_reset(void *opaque) 44 { 45 OpenRISCCPU *cpu = opaque; 46 CPUState *cs = CPU(cpu); 47 48 cpu_reset(CPU(cpu)); 49 50 cpu_set_pc(cs, boot_info.bootstrap_pc); 51 } 52 53 static void openrisc_sim_net_init(hwaddr base, hwaddr descriptors, 54 int num_cpus, qemu_irq **cpu_irqs, 55 int irq_pin, NICInfo *nd) 56 { 57 DeviceState *dev; 58 SysBusDevice *s; 59 int i; 60 61 dev = qdev_create(NULL, "open_eth"); 62 qdev_set_nic_properties(dev, nd); 63 qdev_init_nofail(dev); 64 65 s = SYS_BUS_DEVICE(dev); 66 for (i = 0; i < num_cpus; i++) { 67 sysbus_connect_irq(s, 0, cpu_irqs[i][irq_pin]); 68 } 69 sysbus_mmio_map(s, 0, base); 70 sysbus_mmio_map(s, 1, descriptors); 71 } 72 73 static void openrisc_sim_ompic_init(hwaddr base, int num_cpus, 74 qemu_irq **cpu_irqs, int irq_pin) 75 { 76 DeviceState *dev; 77 SysBusDevice *s; 78 int i; 79 80 dev = qdev_create(NULL, "or1k-ompic"); 81 qdev_prop_set_uint32(dev, "num-cpus", num_cpus); 82 qdev_init_nofail(dev); 83 84 s = SYS_BUS_DEVICE(dev); 85 for (i = 0; i < num_cpus; i++) { 86 sysbus_connect_irq(s, i, cpu_irqs[i][irq_pin]); 87 } 88 sysbus_mmio_map(s, 0, base); 89 } 90 91 static void openrisc_load_kernel(ram_addr_t ram_size, 92 const char *kernel_filename) 93 { 94 long kernel_size; 95 uint64_t elf_entry; 96 hwaddr entry; 97 98 if (kernel_filename && !qtest_enabled()) { 99 kernel_size = load_elf(kernel_filename, NULL, NULL, 100 &elf_entry, NULL, NULL, 1, EM_OPENRISC, 101 1, 0); 102 entry = elf_entry; 103 if (kernel_size < 0) { 104 kernel_size = load_uimage(kernel_filename, 105 &entry, NULL, NULL, NULL, NULL); 106 } 107 if (kernel_size < 0) { 108 kernel_size = load_image_targphys(kernel_filename, 109 KERNEL_LOAD_ADDR, 110 ram_size - KERNEL_LOAD_ADDR); 111 } 112 113 if (entry <= 0) { 114 entry = KERNEL_LOAD_ADDR; 115 } 116 117 if (kernel_size < 0) { 118 error_report("couldn't load the kernel '%s'", kernel_filename); 119 exit(1); 120 } 121 boot_info.bootstrap_pc = entry; 122 } 123 } 124 125 static void openrisc_sim_init(MachineState *machine) 126 { 127 ram_addr_t ram_size = machine->ram_size; 128 const char *kernel_filename = machine->kernel_filename; 129 OpenRISCCPU *cpu = NULL; 130 MemoryRegion *ram; 131 qemu_irq *cpu_irqs[2]; 132 qemu_irq serial_irq; 133 int n; 134 135 for (n = 0; n < smp_cpus; n++) { 136 cpu = OPENRISC_CPU(cpu_create(machine->cpu_type)); 137 if (cpu == NULL) { 138 fprintf(stderr, "Unable to find CPU definition!\n"); 139 exit(1); 140 } 141 cpu_openrisc_pic_init(cpu); 142 cpu_irqs[n] = (qemu_irq *) cpu->env.irq; 143 144 cpu_openrisc_clock_init(cpu); 145 146 qemu_register_reset(main_cpu_reset, cpu); 147 } 148 149 ram = g_malloc(sizeof(*ram)); 150 memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal); 151 memory_region_add_subregion(get_system_memory(), 0, ram); 152 153 if (nd_table[0].used) { 154 openrisc_sim_net_init(0x92000000, 0x92000400, smp_cpus, 155 cpu_irqs, 4, nd_table); 156 } 157 158 if (smp_cpus > 1) { 159 openrisc_sim_ompic_init(0x98000000, smp_cpus, cpu_irqs, 1); 160 161 serial_irq = qemu_irq_split(cpu_irqs[0][2], cpu_irqs[1][2]); 162 } else { 163 serial_irq = cpu_irqs[0][2]; 164 } 165 166 serial_mm_init(get_system_memory(), 0x90000000, 0, serial_irq, 167 115200, serial_hd(0), DEVICE_NATIVE_ENDIAN); 168 169 openrisc_load_kernel(ram_size, kernel_filename); 170 } 171 172 static void openrisc_sim_machine_init(MachineClass *mc) 173 { 174 mc->desc = "or1k simulation"; 175 mc->init = openrisc_sim_init; 176 mc->max_cpus = 2; 177 mc->is_default = 1; 178 mc->default_cpu_type = OPENRISC_CPU_TYPE_NAME("or1200"); 179 } 180 181 DEFINE_MACHINE("or1k-sim", openrisc_sim_machine_init) 182