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 "qemu/osdep.h"
  22 #include "qapi/error.h"
  23 #include "qemu-common.h"
  24 #include "cpu.h"
  25 #include "hw/hw.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 "exec/address-spaces.h"
  32 #include "sysemu/sysemu.h"
  33 #include "hw/sysbus.h"
  34 #include "sysemu/qtest.h"
  35
  36 #define KERNEL_LOAD_ADDR 0x100
  37
  38 static void main_cpu_reset(void *opaque)
  39 {
  40     OpenRISCCPU *cpu = opaque;
  41
  42     cpu_reset(CPU(cpu));
  43 }
  44
  45 static void openrisc_sim_net_init(MemoryRegion *address_space,
  46                                   hwaddr base,
  47                                   hwaddr descriptors,
  48                                   qemu_irq irq, NICInfo *nd)
  49 {
  50     DeviceState *dev;
  51     SysBusDevice *s;
  52
  53     dev = qdev_create(NULL, "open_eth");
  54     qdev_set_nic_properties(dev, nd);
  55     qdev_init_nofail(dev);
  56
  57     s = SYS_BUS_DEVICE(dev);
  58     sysbus_connect_irq(s, 0, irq);
  59     memory_region_add_subregion(address_space, base,
  60                                 sysbus_mmio_get_region(s, 0));
  61     memory_region_add_subregion(address_space, descriptors,
  62                                 sysbus_mmio_get_region(s, 1));
  63 }
  64
  65 static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
  66                                      const char *kernel_filename,
  67                                      OpenRISCCPU *cpu)
  68 {
  69     long kernel_size;
  70     uint64_t elf_entry;
  71     hwaddr entry;
  72
  73     if (kernel_filename && !qtest_enabled()) {
  74         kernel_size = load_elf(kernel_filename, NULL, NULL,
  75                                &elf_entry, NULL, NULL, 1, EM_OPENRISC,
  76                                1, 0);
  77         entry = elf_entry;
  78         if (kernel_size < 0) {
  79             kernel_size = load_uimage(kernel_filename,
  80                                       &entry, NULL, NULL, NULL, NULL);
  81         }
  82         if (kernel_size < 0) {
  83             kernel_size = load_image_targphys(kernel_filename,
  84                                               KERNEL_LOAD_ADDR,
  85                                               ram_size - KERNEL_LOAD_ADDR);
  86             entry = KERNEL_LOAD_ADDR;
  87         }
  88
  89         if (kernel_size < 0) {
  90             fprintf(stderr, "QEMU: couldn't load the kernel '%s'\n",
  91                     kernel_filename);
  92             exit(1);
  93         }
  94         cpu->env.pc = entry;
  95     }
  96 }
  97
  98 static void openrisc_sim_init(MachineState *machine)
  99 {
 100     ram_addr_t ram_size = machine->ram_size;
 101     const char *cpu_model = machine->cpu_model;
 102     const char *kernel_filename = machine->kernel_filename;
 103     OpenRISCCPU *cpu = NULL;
 104     MemoryRegion *ram;
 105     int n;
 106
 107     if (!cpu_model) {
 108         cpu_model = "or1200";
 109     }
 110
 111     for (n = 0; n < smp_cpus; n++) {
 112         cpu = cpu_openrisc_init(cpu_model);
 113         if (cpu == NULL) {
 114             fprintf(stderr, "Unable to find CPU definition!\n");
 115             exit(1);
 116         }
 117         qemu_register_reset(main_cpu_reset, cpu);
 118         main_cpu_reset(cpu);
 119     }
 120
 121     ram = g_malloc(sizeof(*ram));
 122     memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal);
 123     memory_region_add_subregion(get_system_memory(), 0, ram);
 124
 125     cpu_openrisc_pic_init(cpu);
 126     cpu_openrisc_clock_init(cpu);
 127
 128     serial_mm_init(get_system_memory(), 0x90000000, 0, cpu->env.irq[2],
 129                    115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
 130
 131     if (nd_table[0].used) {
 132         openrisc_sim_net_init(get_system_memory(), 0x92000000,
 133                               0x92000400, cpu->env.irq[4], nd_table);
 134     }
 135
 136     cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu);
 137 }
 138
 139 static void openrisc_sim_machine_init(MachineClass *mc)
 140 {
 141     mc->desc = "or1k simulation";
 142     mc->init = openrisc_sim_init;
 143     mc->max_cpus = 1;
 144     mc->is_default = 1;
 145 }
 146
 147 DEFINE_MACHINE("or1k-sim", openrisc_sim_machine_init)