hw/openrisc/openrisc_sim.c

   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 2.1 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 "cpu.h"
  25 #include "hw/irq.h"
  26 #include "hw/boards.h"
  27 #include "elf.h"
  28 #include "hw/char/serial.h"
  29 #include "net/net.h"
  30 #include "hw/loader.h"
  31 #include "hw/qdev-properties.h"
  32 #include "exec/address-spaces.h"
  33 #include "sysemu/sysemu.h"
  34 #include "hw/sysbus.h"
  35 #include "sysemu/qtest.h"
  36 #include "sysemu/reset.h"
  37
  38 #define KERNEL_LOAD_ADDR 0x100
  39
  40 static struct openrisc_boot_info {
  41     uint32_t bootstrap_pc;
  42 } boot_info;
  43
  44 static void main_cpu_reset(void *opaque)
  45 {
  46     OpenRISCCPU *cpu = opaque;
  47     CPUState *cs = CPU(cpu);
  48
  49     cpu_reset(CPU(cpu));
  50
  51     cpu_set_pc(cs, boot_info.bootstrap_pc);
  52 }
  53
  54 static void openrisc_sim_net_init(hwaddr base, hwaddr descriptors,
  55                                   int num_cpus, qemu_irq **cpu_irqs,
  56                                   int irq_pin, NICInfo *nd)
  57 {
  58     DeviceState *dev;
  59     SysBusDevice *s;
  60     int i;
  61
  62     dev = qdev_new("open_eth");
  63     qdev_set_nic_properties(dev, nd);
  64
  65     s = SYS_BUS_DEVICE(dev);
  66     sysbus_realize_and_unref(s, &error_fatal);
  67     for (i = 0; i < num_cpus; i++) {
  68         sysbus_connect_irq(s, 0, cpu_irqs[i][irq_pin]);
  69     }
  70     sysbus_mmio_map(s, 0, base);
  71     sysbus_mmio_map(s, 1, descriptors);
  72 }
  73
  74 static void openrisc_sim_ompic_init(hwaddr base, int num_cpus,
  75                                     qemu_irq **cpu_irqs, int irq_pin)
  76 {
  77     DeviceState *dev;
  78     SysBusDevice *s;
  79     int i;
  80
  81     dev = qdev_new("or1k-ompic");
  82     qdev_prop_set_uint32(dev, "num-cpus", num_cpus);
  83
  84     s = SYS_BUS_DEVICE(dev);
  85     sysbus_realize_and_unref(s, &error_fatal);
  86     for (i = 0; i < num_cpus; i++) {
  87         sysbus_connect_irq(s, i, cpu_irqs[i][irq_pin]);
  88     }
  89     sysbus_mmio_map(s, 0, base);
  90 }
  91
  92 static void openrisc_load_kernel(ram_addr_t ram_size,
  93                                  const char *kernel_filename)
  94 {
  95     long kernel_size;
  96     uint64_t elf_entry;
  97     hwaddr entry;
  98
  99     if (kernel_filename && !qtest_enabled()) {
 100         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
 101                                &elf_entry, NULL, NULL, NULL, 1, EM_OPENRISC,
 102                                1, 0);
 103         entry = elf_entry;
 104         if (kernel_size < 0) {
 105             kernel_size = load_uimage(kernel_filename,
 106                                       &entry, NULL, NULL, NULL, NULL);
 107         }
 108         if (kernel_size < 0) {
 109             kernel_size = load_image_targphys(kernel_filename,
 110                                               KERNEL_LOAD_ADDR,
 111                                               ram_size - KERNEL_LOAD_ADDR);
 112         }
 113
 114         if (entry <= 0) {
 115             entry = KERNEL_LOAD_ADDR;
 116         }
 117
 118         if (kernel_size < 0) {
 119             error_report("couldn't load the kernel '%s'", kernel_filename);
 120             exit(1);
 121         }
 122         boot_info.bootstrap_pc = entry;
 123     }
 124 }
 125
 126 static void openrisc_sim_init(MachineState *machine)
 127 {
 128     ram_addr_t ram_size = machine->ram_size;
 129     const char *kernel_filename = machine->kernel_filename;
 130     OpenRISCCPU *cpu = NULL;
 131     MemoryRegion *ram;
 132     qemu_irq *cpu_irqs[2];
 133     qemu_irq serial_irq;
 134     int n;
 135     unsigned int smp_cpus = machine->smp.cpus;
 136
 137     assert(smp_cpus >= 1 && smp_cpus <= 2);
 138     for (n = 0; n < smp_cpus; n++) {
 139         cpu = OPENRISC_CPU(cpu_create(machine->cpu_type));
 140         if (cpu == NULL) {
 141             fprintf(stderr, "Unable to find CPU definition!\n");
 142             exit(1);
 143         }
 144         cpu_openrisc_pic_init(cpu);
 145         cpu_irqs[n] = (qemu_irq *) cpu->env.irq;
 146
 147         cpu_openrisc_clock_init(cpu);
 148
 149         qemu_register_reset(main_cpu_reset, cpu);
 150     }
 151
 152     ram = g_malloc(sizeof(*ram));
 153     memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal);
 154     memory_region_add_subregion(get_system_memory(), 0, ram);
 155
 156     if (nd_table[0].used) {
 157         openrisc_sim_net_init(0x92000000, 0x92000400, smp_cpus,
 158                               cpu_irqs, 4, nd_table);
 159     }
 160
 161     if (smp_cpus > 1) {
 162         openrisc_sim_ompic_init(0x98000000, smp_cpus, cpu_irqs, 1);
 163
 164         serial_irq = qemu_irq_split(cpu_irqs[0][2], cpu_irqs[1][2]);
 165     } else {
 166         serial_irq = cpu_irqs[0][2];
 167     }
 168
 169     serial_mm_init(get_system_memory(), 0x90000000, 0, serial_irq,
 170                    115200, serial_hd(0), DEVICE_NATIVE_ENDIAN);
 171
 172     openrisc_load_kernel(ram_size, kernel_filename);
 173 }
 174
 175 static void openrisc_sim_machine_init(MachineClass *mc)
 176 {
 177     mc->desc = "or1k simulation";
 178     mc->init = openrisc_sim_init;
 179     mc->max_cpus = 2;
 180     mc->is_default = true;
 181     mc->default_cpu_type = OPENRISC_CPU_TYPE_NAME("or1200");
 182 }
 183
 184 DEFINE_MACHINE("or1k-sim", openrisc_sim_machine_init)