mirror of https://gitee.com/openkylin/qemu.git
146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/*
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* OpenRISC simulator for use as an IIS.
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*
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* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
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* Feng Gao <gf91597@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/boards.h"
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#include "elf.h"
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#include "hw/char/serial.h"
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#include "net/net.h"
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#include "hw/loader.h"
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#include "exec/address-spaces.h"
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#include "sysemu/sysemu.h"
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#include "hw/sysbus.h"
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#include "sysemu/qtest.h"
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#define KERNEL_LOAD_ADDR 0x100
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static void main_cpu_reset(void *opaque)
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{
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OpenRISCCPU *cpu = opaque;
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cpu_reset(CPU(cpu));
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}
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static void openrisc_sim_net_init(MemoryRegion *address_space,
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hwaddr base,
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hwaddr descriptors,
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qemu_irq irq, NICInfo *nd)
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{
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DeviceState *dev;
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SysBusDevice *s;
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dev = qdev_create(NULL, "open_eth");
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qdev_set_nic_properties(dev, nd);
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qdev_init_nofail(dev);
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s = SYS_BUS_DEVICE(dev);
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sysbus_connect_irq(s, 0, irq);
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memory_region_add_subregion(address_space, base,
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sysbus_mmio_get_region(s, 0));
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memory_region_add_subregion(address_space, descriptors,
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sysbus_mmio_get_region(s, 1));
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}
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static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
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const char *kernel_filename,
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OpenRISCCPU *cpu)
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{
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long kernel_size;
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uint64_t elf_entry;
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hwaddr entry;
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if (kernel_filename && !qtest_enabled()) {
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kernel_size = load_elf(kernel_filename, NULL, NULL,
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&elf_entry, NULL, NULL, 1, EM_OPENRISC,
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1, 0);
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entry = elf_entry;
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if (kernel_size < 0) {
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kernel_size = load_uimage(kernel_filename,
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&entry, NULL, NULL, NULL, NULL);
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}
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if (kernel_size < 0) {
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kernel_size = load_image_targphys(kernel_filename,
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KERNEL_LOAD_ADDR,
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ram_size - KERNEL_LOAD_ADDR);
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entry = KERNEL_LOAD_ADDR;
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}
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if (kernel_size < 0) {
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fprintf(stderr, "QEMU: couldn't load the kernel '%s'\n",
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kernel_filename);
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exit(1);
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}
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cpu->env.pc = entry;
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}
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}
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static void openrisc_sim_init(MachineState *machine)
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{
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ram_addr_t ram_size = machine->ram_size;
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const char *cpu_model = machine->cpu_model;
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const char *kernel_filename = machine->kernel_filename;
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OpenRISCCPU *cpu = NULL;
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MemoryRegion *ram;
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int n;
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if (!cpu_model) {
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cpu_model = "or1200";
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}
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for (n = 0; n < smp_cpus; n++) {
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cpu = cpu_openrisc_init(cpu_model);
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if (cpu == NULL) {
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fprintf(stderr, "Unable to find CPU definition!\n");
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exit(1);
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}
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qemu_register_reset(main_cpu_reset, cpu);
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main_cpu_reset(cpu);
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}
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ram = g_malloc(sizeof(*ram));
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memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal);
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vmstate_register_ram_global(ram);
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memory_region_add_subregion(get_system_memory(), 0, ram);
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cpu_openrisc_pic_init(cpu);
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cpu_openrisc_clock_init(cpu);
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serial_mm_init(get_system_memory(), 0x90000000, 0, cpu->env.irq[2],
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115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
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if (nd_table[0].used) {
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openrisc_sim_net_init(get_system_memory(), 0x92000000,
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0x92000400, cpu->env.irq[4], nd_table);
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}
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cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu);
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}
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static void openrisc_sim_machine_init(MachineClass *mc)
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{
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mc->desc = "or32 simulation";
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mc->init = openrisc_sim_init;
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mc->max_cpus = 1;
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mc->is_default = 1;
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}
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DEFINE_MACHINE("or32-sim", openrisc_sim_machine_init)
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