Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20210921...
[qemu.git] / 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 "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)