LXR qemu/hw/m68k/an5206.c

   1/*
   2 * Arnewsh 5206 ColdFire system emulation.
   3 *
   4 * Copyright (c) 2007 CodeSourcery.
   5 *
   6 * This code is licensed under the GPL
   7 */
   8
   9#include "qemu/osdep.h"
  10#include "qapi/error.h"
  11#include "cpu.h"
  12#include "hw/m68k/mcf.h"
  13#include "hw/boards.h"
  14#include "hw/loader.h"
  15#include "elf.h"
  16#include "exec/address-spaces.h"
  17#include "qemu/error-report.h"
  18#include "sysemu/qtest.h"
  19
  20#define KERNEL_LOAD_ADDR 0x10000
  21#define AN5206_MBAR_ADDR 0x10000000
  22#define AN5206_RAMBAR_ADDR 0x20000000
  23
  24static void mcf5206_init(MemoryRegion *sysmem, uint32_t base)
  25{
  26    DeviceState *dev;
  27    SysBusDevice *s;
  28
  29    dev = qdev_new(TYPE_MCF5206_MBAR);
  30    s = SYS_BUS_DEVICE(dev);
  31    sysbus_realize_and_unref(s, &error_fatal);
  32
  33    memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
  34}
  35
  36static void an5206_init(MachineState *machine)
  37{
  38    ram_addr_t ram_size = machine->ram_size;
  39    const char *kernel_filename = machine->kernel_filename;
  40    M68kCPU *cpu;
  41    CPUM68KState *env;
  42    int kernel_size;
  43    uint64_t elf_entry;
  44    hwaddr entry;
  45    MemoryRegion *address_space_mem = get_system_memory();
  46    MemoryRegion *sram = g_new(MemoryRegion, 1);
  47
  48    cpu = M68K_CPU(cpu_create(machine->cpu_type));
  49    env = &cpu->env;
  50
  51    /* Initialize CPU registers.  */
  52    env->vbr = 0;
  53    /* TODO: allow changing MBAR and RAMBAR.  */
  54    env->mbar = AN5206_MBAR_ADDR | 1;
  55    env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  56
  57    /* DRAM at address zero */
  58    memory_region_add_subregion(address_space_mem, 0, machine->ram);
  59
  60    /* Internal SRAM.  */
  61    memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  62    memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  63
  64    mcf5206_init(address_space_mem, AN5206_MBAR_ADDR);
  65
  66    /* Load kernel.  */
  67    if (!kernel_filename) {
  68        if (qtest_enabled()) {
  69            return;
  70        }
  71        error_report("Kernel image must be specified");
  72        exit(1);
  73    }
  74
  75    kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
  76                           NULL, NULL, NULL, 1, EM_68K, 0, 0);
  77    entry = elf_entry;
  78    if (kernel_size < 0) {
  79        kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  80                                  NULL, NULL);
  81    }
  82    if (kernel_size < 0) {
  83        kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  84                                          ram_size - KERNEL_LOAD_ADDR);
  85        entry = KERNEL_LOAD_ADDR;
  86    }
  87    if (kernel_size < 0) {
  88        error_report("Could not load kernel '%s'", kernel_filename);
  89        exit(1);
  90    }
  91
  92    env->pc = entry;
  93}
  94
  95static void an5206_machine_init(MachineClass *mc)
  96{
  97    mc->desc = "Arnewsh 5206";
  98    mc->init = an5206_init;
  99    mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
 100    mc->default_ram_id = "an5206.ram";
 101}
 102
 103DEFINE_MACHINE("an5206", an5206_machine_init)
 104