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 *kernel_filename = machine->kernel_filename;
  32    M68kCPU *cpu;
  33    CPUM68KState *env;
  34    int kernel_size;
  35    uint64_t elf_entry;
  36    hwaddr entry;
  37    MemoryRegion *address_space_mem = get_system_memory();
  38    MemoryRegion *ram = g_new(MemoryRegion, 1);
  39    MemoryRegion *sram = g_new(MemoryRegion, 1);
  40
  41    cpu = M68K_CPU(cpu_create(machine->cpu_type));
  42    env = &cpu->env;
  43
  44    /* Initialize CPU registers.  */
  45    env->vbr = 0;
  46    /* TODO: allow changing MBAR and RAMBAR.  */
  47    env->mbar = AN5206_MBAR_ADDR | 1;
  48    env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  49
  50    /* DRAM at address zero */
  51    memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  52    memory_region_add_subregion(address_space_mem, 0, ram);
  53
  54    /* Internal SRAM.  */
  55    memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  56    memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  57
  58    mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  59
  60    /* Load kernel.  */
  61    if (!kernel_filename) {
  62        if (qtest_enabled()) {
  63            return;
  64        }
  65        error_report("Kernel image must be specified");
  66        exit(1);
  67    }
  68
  69    kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  70                           NULL, NULL, 1, EM_68K, 0, 0);
  71    entry = elf_entry;
  72    if (kernel_size < 0) {
  73        kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  74                                  NULL, NULL);
  75    }
  76    if (kernel_size < 0) {
  77        kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  78                                          ram_size - KERNEL_LOAD_ADDR);
  79        entry = KERNEL_LOAD_ADDR;
  80    }
  81    if (kernel_size < 0) {
  82        error_report("Could not load kernel '%s'", kernel_filename);
  83        exit(1);
  84    }
  85
  86    env->pc = entry;
  87}
  88
  89static void an5206_machine_init(MachineClass *mc)
  90{
  91    mc->desc = "Arnewsh 5206";
  92    mc->init = an5206_init;
  93    mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
  94}
  95
  96DEFINE_MACHINE("an5206", an5206_machine_init)
  97