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