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 "qemu-common.h"
  12#include "cpu.h"
  13#include "hw/hw.h"
  14#include "hw/m68k/mcf.h"
  15#include "hw/boards.h"
  16#include "hw/loader.h"
  17#include "elf.h"
  18#include "exec/address-spaces.h"
  19#include "qemu/error-report.h"
  20#include "sysemu/qtest.h"
  21
  22#define KERNEL_LOAD_ADDR 0x10000
  23#define AN5206_MBAR_ADDR 0x10000000
  24#define AN5206_RAMBAR_ADDR 0x20000000
  25
  26/* Board init.  */
  27
  28static void an5206_init(MachineState *machine)
  29{
  30    ram_addr_t ram_size = machine->ram_size;
  31    const char *cpu_model = machine->cpu_model;
  32    const char *kernel_filename = machine->kernel_filename;
  33    M68kCPU *cpu;
  34    CPUM68KState *env;
  35    int kernel_size;
  36    uint64_t elf_entry;
  37    hwaddr entry;
  38    MemoryRegion *address_space_mem = get_system_memory();
  39    MemoryRegion *ram = g_new(MemoryRegion, 1);
  40    MemoryRegion *sram = g_new(MemoryRegion, 1);
  41
  42    if (!cpu_model) {
  43        cpu_model = "m5206";
  44    }
  45    cpu = cpu_m68k_init(cpu_model);
  46    if (!cpu) {
  47        error_report("Unable to find m68k CPU definition");
  48        exit(1);
  49    }
  50    env = &cpu->env;
  51
  52    /* Initialize CPU registers.  */
  53    env->vbr = 0;
  54    /* TODO: allow changing MBAR and RAMBAR.  */
  55    env->mbar = AN5206_MBAR_ADDR | 1;
  56    env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  57
  58    /* DRAM at address zero */
  59    memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  60    memory_region_add_subregion(address_space_mem, 0, ram);
  61
  62    /* Internal SRAM.  */
  63    memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  64    memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  65
  66    mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  67
  68    /* Load kernel.  */
  69    if (!kernel_filename) {
  70        if (qtest_enabled()) {
  71            return;
  72        }
  73        fprintf(stderr, "Kernel image must be specified\n");
  74        exit(1);
  75    }
  76
  77    kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  78                           NULL, NULL, 1, EM_68K, 0, 0);
  79    entry = elf_entry;
  80    if (kernel_size < 0) {
  81        kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  82                                  NULL, NULL);
  83    }
  84    if (kernel_size < 0) {
  85        kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  86                                          ram_size - KERNEL_LOAD_ADDR);
  87        entry = KERNEL_LOAD_ADDR;
  88    }
  89    if (kernel_size < 0) {
  90        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  91        exit(1);
  92    }
  93
  94    env->pc = entry;
  95}
  96
  97static void an5206_machine_init(MachineClass *mc)
  98{
  99    mc->desc = "Arnewsh 5206";
 100    mc->init = an5206_init;
 101}
 102
 103DEFINE_MACHINE("an5206", an5206_machine_init)
 104