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 "hw/hw.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 *cpu_model = machine->cpu_model;
  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     if (!cpu_model) {
  41         cpu_model = "m5206";
  42     }
  43     cpu = cpu_m68k_init(cpu_model);
  44     if (!cpu) {
  45         error_report("Unable to find m68k CPU definition");
  46         exit(1);
  47     }
  48     env = &cpu->env;
  49
  50     /* Initialize CPU registers.  */
  51     env->vbr = 0;
  52     /* TODO: allow changing MBAR and RAMBAR.  */
  53     env->mbar = AN5206_MBAR_ADDR | 1;
  54     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  55
  56     /* DRAM at address zero */
  57     memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  58     memory_region_add_subregion(address_space_mem, 0, ram);
  59
  60     /* Internal SRAM.  */
  61     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  62     vmstate_register_ram_global(sram);
  63     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  64
  65     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  66
  67     /* Load kernel.  */
  68     if (!kernel_filename) {
  69         if (qtest_enabled()) {
  70             return;
  71         }
  72         fprintf(stderr, "Kernel image must be specified\n");
  73         exit(1);
  74     }
  75
  76     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  77                            NULL, NULL, 1, EM_68K, 0, 0);
  78     entry = elf_entry;
  79     if (kernel_size < 0) {
  80         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  81                                   NULL, NULL);
  82     }
  83     if (kernel_size < 0) {
  84         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  85                                           ram_size - KERNEL_LOAD_ADDR);
  86         entry = KERNEL_LOAD_ADDR;
  87     }
  88     if (kernel_size < 0) {
  89         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  90         exit(1);
  91     }
  92
  93     env->pc = entry;
  94 }
  95
  96 static void an5206_machine_init(MachineClass *mc)
  97 {
  98     mc->desc = "Arnewsh 5206";
  99     mc->init = an5206_init;
 100 }
 101
 102 DEFINE_MACHINE("an5206", an5206_machine_init)