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
mcf5206_init(M68kCPU * cpu,MemoryRegion * sysmem,uint32_t base)23 static void mcf5206_init(M68kCPU *cpu, MemoryRegion *sysmem, uint32_t base)
24 {
25 DeviceState *dev;
26 SysBusDevice *s;
27
28 dev = qdev_new(TYPE_MCF5206_MBAR);
29 object_property_set_link(OBJECT(dev), "m68k-cpu",
30 OBJECT(cpu), &error_abort);
31 s = SYS_BUS_DEVICE(dev);
32 sysbus_realize_and_unref(s, &error_fatal);
33
34 memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
35 }
36
an5206_init(MachineState * machine)37 static void an5206_init(MachineState *machine)
38 {
39 ram_addr_t ram_size = machine->ram_size;
40 const char *kernel_filename = machine->kernel_filename;
41 M68kCPU *cpu;
42 CPUM68KState *env;
43 int kernel_size;
44 uint64_t elf_entry;
45 hwaddr entry;
46 MemoryRegion *address_space_mem = get_system_memory();
47 MemoryRegion *sram = g_new(MemoryRegion, 1);
48
49 cpu = M68K_CPU(cpu_create(machine->cpu_type));
50 env = &cpu->env;
51
52 /* Initialize CPU registers. */
53 env->vbr = 0;
54 /* TODO: allow changing MBAR and RAMBAR. */
55 env->mbar = AN5206_MBAR_ADDR | 1;
56 env->rambar0 = AN5206_RAMBAR_ADDR | 1;
57
58 /* DRAM at address zero */
59 memory_region_add_subregion(address_space_mem, 0, machine->ram);
60
61 /* Internal SRAM. */
62 memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
63 memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
64
65 mcf5206_init(cpu, address_space_mem, AN5206_MBAR_ADDR);
66
67 /* Load kernel. */
68 if (!kernel_filename) {
69 if (qtest_enabled()) {
70 return;
71 }
72 error_report("Kernel image must be specified");
73 exit(1);
74 }
75
76 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
77 NULL, 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 error_report("Could not load kernel '%s'", kernel_filename);
90 exit(1);
91 }
92
93 env->pc = entry;
94 }
95
an5206_machine_init(MachineClass * mc)96 static void an5206_machine_init(MachineClass *mc)
97 {
98 mc->desc = "Arnewsh 5206";
99 mc->init = an5206_init;
100 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
101 mc->default_ram_id = "an5206.ram";
102 }
103
104 DEFINE_MACHINE("an5206", an5206_machine_init)
105