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
  28 static 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, 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
  89 static 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
  96 DEFINE_MACHINE("an5206", an5206_machine_init)