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/*
* QEMU/moxiesim emulation
*
* Emulates a very simple machine model similiar to the one use by the
* GDB moxie simulator.
*
* Copyright (c) 2008, 2009, 2010, 2013 Anthony Green
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw/sysbus.h"
#include "hw/hw.h"
#include "hw/pc.h"
#include "hw/isa.h"
#include "net/net.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/serial.h"
#include "exec/address-spaces.h"
#define PHYS_MEM_BASE 0x80000000
typedef struct {
uint64_t ram_size;
const char *kernel_filename;
const char *kernel_cmdline;
const char *initrd_filename;
} LoaderParams;
static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params)
{
uint64_t entry, kernel_low, kernel_high;
long kernel_size;
long initrd_size;
ram_addr_t initrd_offset;
kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL,
&entry, &kernel_low, &kernel_high, 1,
ELF_MACHINE, 0);
if (!kernel_size) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
loader_params->kernel_filename);
exit(1);
}
/* load initrd */
initrd_size = 0;
initrd_offset = 0;
if (loader_params->initrd_filename) {
initrd_size = get_image_size(loader_params->initrd_filename);
if (initrd_size > 0) {
initrd_offset = (kernel_high + ~TARGET_PAGE_MASK)
& TARGET_PAGE_MASK;
if (initrd_offset + initrd_size > loader_params->ram_size) {
fprintf(stderr,
"qemu: memory too small for initial ram disk '%s'\n",
loader_params->initrd_filename);
exit(1);
}
initrd_size = load_image_targphys(loader_params->initrd_filename,
initrd_offset,
ram_size);
}
if (initrd_size == (target_ulong)-1) {
fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
loader_params->initrd_filename);
exit(1);
}
}
}
static void main_cpu_reset(void *opaque)
{
MoxieCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static inline DeviceState *
moxie_intc_create(hwaddr base, qemu_irq irq, int kind_of_intr)
{
DeviceState *dev;
dev = qdev_create(NULL, "moxie,intc");
qdev_prop_set_uint32(dev, "kind-of-intr", kind_of_intr);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq);
return dev;
}
static void moxiesim_init(QEMUMachineInitArgs *args)
{
MoxieCPU *cpu = NULL;
ram_addr_t ram_size = args->ram_size;
const char *cpu_model = args->cpu_model;
const char *kernel_filename = args->kernel_filename;
const char *kernel_cmdline = args->kernel_cmdline;
const char *initrd_filename = args->initrd_filename;
CPUMoxieState *env;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *rom = g_new(MemoryRegion, 1);
hwaddr ram_base = 0x200000;
LoaderParams loader_params;
/* Init CPUs. */
if (cpu_model == NULL) {
cpu_model = "MoxieLite-moxie-cpu";
}
cpu = cpu_moxie_init(cpu_model);
if (!cpu) {
fprintf(stderr, "Unable to find CPU definition\n");
exit(1);
}
env = &cpu->env;
qemu_register_reset(main_cpu_reset, cpu);
/* Allocate RAM. */
memory_region_init_ram(ram, "moxiesim.ram", ram_size);
vmstate_register_ram_global(ram);
memory_region_add_subregion(address_space_mem, ram_base, ram);
memory_region_init_ram(rom, "moxie.rom", 128*0x1000);
vmstate_register_ram_global(rom);
memory_region_add_subregion(get_system_memory(), 0x1000, rom);
if (kernel_filename) {
loader_params.ram_size = ram_size;
loader_params.kernel_filename = kernel_filename;
loader_params.kernel_cmdline = kernel_cmdline;
loader_params.initrd_filename = initrd_filename;
load_kernel(cpu, &loader_params);
}
/* A single 16450 sits at offset 0x3f8. */
if (serial_hds[0]) {
serial_mm_init(address_space_mem, 0x3f8, 0, env->irq[4],
8000000/16, serial_hds[0], DEVICE_LITTLE_ENDIAN);
}
}
static QEMUMachine moxiesim_machine = {
.name = "moxiesim",
.desc = "Moxie simulator platform",
.init = moxiesim_init,
.is_default = 1,
};
static void moxie_machine_init(void)
{
qemu_register_machine(&moxiesim_machine);
}
machine_init(moxie_machine_init)
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