xref: /openbmc/qemu/hw/m68k/an5206.c (revision b4b9a0e3)
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 "qemu/error-report.h"
17  #include "sysemu/qtest.h"
18  
19  #define KERNEL_LOAD_ADDR 0x10000
20  #define AN5206_MBAR_ADDR 0x10000000
21  #define AN5206_RAMBAR_ADDR 0x20000000
22  
23  static void mcf5206_init(MemoryRegion *sysmem, uint32_t base)
24  {
25      DeviceState *dev;
26      SysBusDevice *s;
27  
28      dev = qdev_new(TYPE_MCF5206_MBAR);
29      s = SYS_BUS_DEVICE(dev);
30      sysbus_realize_and_unref(s, &error_fatal);
31  
32      memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
33  }
34  
35  static void an5206_init(MachineState *machine)
36  {
37      ram_addr_t ram_size = machine->ram_size;
38      const char *kernel_filename = machine->kernel_filename;
39      M68kCPU *cpu;
40      CPUM68KState *env;
41      int kernel_size;
42      uint64_t elf_entry;
43      hwaddr entry;
44      MemoryRegion *address_space_mem = get_system_memory();
45      MemoryRegion *sram = g_new(MemoryRegion, 1);
46  
47      cpu = M68K_CPU(cpu_create(machine->cpu_type));
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_add_subregion(address_space_mem, 0, machine->ram);
58  
59      /* Internal SRAM.  */
60      memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
61      memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
62  
63      mcf5206_init(address_space_mem, AN5206_MBAR_ADDR);
64  
65      /* Load kernel.  */
66      if (!kernel_filename) {
67          if (qtest_enabled()) {
68              return;
69          }
70          error_report("Kernel image must be specified");
71          exit(1);
72      }
73  
74      kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
75                             NULL, NULL, NULL, 1, EM_68K, 0, 0);
76      entry = elf_entry;
77      if (kernel_size < 0) {
78          kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
79                                    NULL, NULL);
80      }
81      if (kernel_size < 0) {
82          kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
83                                            ram_size - KERNEL_LOAD_ADDR);
84          entry = KERNEL_LOAD_ADDR;
85      }
86      if (kernel_size < 0) {
87          error_report("Could not load kernel '%s'", kernel_filename);
88          exit(1);
89      }
90  
91      env->pc = entry;
92  }
93  
94  static void an5206_machine_init(MachineClass *mc)
95  {
96      mc->desc = "Arnewsh 5206";
97      mc->init = an5206_init;
98      mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
99      mc->default_ram_id = "an5206.ram";
100  }
101  
102  DEFINE_MACHINE("an5206", an5206_machine_init)
103