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 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, ELF_MACHINE, 1);
  72         entry = elf_entry;
  73         if (kernel_size < 0) {
  74             kernel_size = load_uimage(kernel_filename,
  75                                       &entry, 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);
 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 QEMUMachine openrisc_sim_machine = {
 136     .name = "or32-sim",
 137     .desc = "or32 simulation",
 138     .init = openrisc_sim_init,
 139     .max_cpus = 1,
 140     .is_default = 1,
 141 };
 142
 143 static void openrisc_sim_machine_init(void)
 144 {
 145     qemu_register_machine(&openrisc_sim_machine);
 146 }
 147
 148 machine_init(openrisc_sim_machine_init);