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