Archipelago » qemu

/*

 * Arnewsh 5206 ColdFire system emulation.

 *

 * Copyright (c) 2007 CodeSourcery.

 *

 * This code is licensed under the GPL

 */

#include "hw/hw.h"

#include "hw/m68k/mcf.h"

#include "hw/boards.h"

#include "hw/loader.h"

#include "elf.h"

#include "exec/address-spaces.h"

#define KERNEL_LOAD_ADDR 0x10000

#define AN5206_MBAR_ADDR 0x10000000

#define AN5206_RAMBAR_ADDR 0x20000000

/* Board init.  */

static void an5206_init(QEMUMachineInitArgs *args)

{

    ram_addr_t ram_size = args->ram_size;

    const char *cpu_model = args->cpu_model;

    const char *kernel_filename = args->kernel_filename;

    M68kCPU *cpu;

    CPUM68KState *env;

    int kernel_size;

    uint64_t elf_entry;

    hwaddr entry;

    MemoryRegion *address_space_mem = get_system_memory();

    MemoryRegion *ram = g_new(MemoryRegion, 1);

    MemoryRegion *sram = g_new(MemoryRegion, 1);

    if (!cpu_model) {

        cpu_model = "m5206";

    }

    cpu = cpu_m68k_init(cpu_model);

    if (!cpu) {

        hw_error("Unable to find m68k CPU definition\n");

    }

    env = &cpu->env;

    /* Initialize CPU registers.  */

    env->vbr = 0;

    /* TODO: allow changing MBAR and RAMBAR.  */

    env->mbar = AN5206_MBAR_ADDR | 1;

    env->rambar0 = AN5206_RAMBAR_ADDR | 1;

    /* DRAM at address zero */

    memory_region_init_ram(ram, NULL, "an5206.ram", ram_size);

    vmstate_register_ram_global(ram);

    memory_region_add_subregion(address_space_mem, 0, ram);

    /* Internal SRAM.  */

    memory_region_init_ram(sram, NULL, "an5206.sram", 512);

    vmstate_register_ram_global(sram);

    memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);

    mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);

    /* Load kernel.  */

    if (!kernel_filename) {

        fprintf(stderr, "Kernel image must be specified\n");

        exit(1);

    }

    kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,

                           NULL, NULL, 1, ELF_MACHINE, 0);

    entry = elf_entry;

    if (kernel_size < 0) {

        kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);

    }

    if (kernel_size < 0) {

        kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,

                                          ram_size - KERNEL_LOAD_ADDR);

        entry = KERNEL_LOAD_ADDR;

    }

    if (kernel_size < 0) {

        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);

        exit(1);

    }

    env->pc = entry;

}

static QEMUMachine an5206_machine = {

    .name = "an5206",

    .desc = "Arnewsh 5206",

    .init = an5206_init,

    DEFAULT_MACHINE_OPTIONS,

};

static void an5206_machine_init(void)

{

    qemu_register_machine(&an5206_machine);

}

machine_init(an5206_machine_init);