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 "hw/hw.h"
  10 #include "hw/m68k/mcf.h"
  11 #include "hw/boards.h"
  12 #include "hw/loader.h"
  13 #include "elf.h"
  14 #include "exec/address-spaces.h"
  15 #include "sysemu/qtest.h"
  16
  17 #define KERNEL_LOAD_ADDR 0x10000
  18 #define AN5206_MBAR_ADDR 0x10000000
  19 #define AN5206_RAMBAR_ADDR 0x20000000
  20
  21 /* Board init.  */
  22
  23 static void an5206_init(MachineState *machine)
  24 {
  25     ram_addr_t ram_size = machine->ram_size;
  26     const char *cpu_model = machine->cpu_model;
  27     const char *kernel_filename = machine->kernel_filename;
  28     M68kCPU *cpu;
  29     CPUM68KState *env;
  30     int kernel_size;
  31     uint64_t elf_entry;
  32     hwaddr entry;
  33     MemoryRegion *address_space_mem = get_system_memory();
  34     MemoryRegion *ram = g_new(MemoryRegion, 1);
  35     MemoryRegion *sram = g_new(MemoryRegion, 1);
  36
  37     if (!cpu_model) {
  38         cpu_model = "m5206";
  39     }
  40     cpu = cpu_m68k_init(cpu_model);
  41     if (!cpu) {
  42         hw_error("Unable to find m68k CPU definition\n");
  43     }
  44     env = &cpu->env;
  45
  46     /* Initialize CPU registers.  */
  47     env->vbr = 0;
  48     /* TODO: allow changing MBAR and RAMBAR.  */
  49     env->mbar = AN5206_MBAR_ADDR | 1;
  50     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  51
  52     /* DRAM at address zero */
  53     memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  54     memory_region_add_subregion(address_space_mem, 0, ram);
  55
  56     /* Internal SRAM.  */
  57     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_abort);
  58     vmstate_register_ram_global(sram);
  59     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  60
  61     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  62
  63     /* Load kernel.  */
  64     if (!kernel_filename) {
  65         if (qtest_enabled()) {
  66             return;
  67         }
  68         fprintf(stderr, "Kernel image must be specified\n");
  69         exit(1);
  70     }
  71
  72     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  73                            NULL, NULL, 1, ELF_MACHINE, 0);
  74     entry = elf_entry;
  75     if (kernel_size < 0) {
  76         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  77                                   NULL, NULL);
  78     }
  79     if (kernel_size < 0) {
  80         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  81                                           ram_size - KERNEL_LOAD_ADDR);
  82         entry = KERNEL_LOAD_ADDR;
  83     }
  84     if (kernel_size < 0) {
  85         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  86         exit(1);
  87     }
  88
  89     env->pc = entry;
  90 }
  91
  92 static QEMUMachine an5206_machine = {
  93     .name = "an5206",
  94     .desc = "Arnewsh 5206",
  95     .init = an5206_init,
  96 };
  97
  98 static void an5206_machine_init(void)
  99 {
 100     qemu_register_machine(&an5206_machine);
 101 }
 102
 103 machine_init(an5206_machine_init);