xref: /openbmc/qemu/hw/m68k/an5206.c (revision c39f95dc)
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 *cpu_model = machine->cpu_model;
32     const char *kernel_filename = machine->kernel_filename;
33     M68kCPU *cpu;
34     CPUM68KState *env;
35     int kernel_size;
36     uint64_t elf_entry;
37     hwaddr entry;
38     MemoryRegion *address_space_mem = get_system_memory();
39     MemoryRegion *ram = g_new(MemoryRegion, 1);
40     MemoryRegion *sram = g_new(MemoryRegion, 1);
41 
42     if (!cpu_model) {
43         cpu_model = "m5206";
44     }
45     cpu = M68K_CPU(cpu_generic_init(TYPE_M68K_CPU, cpu_model));
46     env = &cpu->env;
47 
48     /* Initialize CPU registers.  */
49     env->vbr = 0;
50     /* TODO: allow changing MBAR and RAMBAR.  */
51     env->mbar = AN5206_MBAR_ADDR | 1;
52     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
53 
54     /* DRAM at address zero */
55     memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
56     memory_region_add_subregion(address_space_mem, 0, ram);
57 
58     /* Internal SRAM.  */
59     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
60     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
61 
62     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
63 
64     /* Load kernel.  */
65     if (!kernel_filename) {
66         if (qtest_enabled()) {
67             return;
68         }
69         error_report("Kernel image must be specified");
70         exit(1);
71     }
72 
73     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
74                            NULL, NULL, 1, EM_68K, 0, 0);
75     entry = elf_entry;
76     if (kernel_size < 0) {
77         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
78                                   NULL, NULL);
79     }
80     if (kernel_size < 0) {
81         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
82                                           ram_size - KERNEL_LOAD_ADDR);
83         entry = KERNEL_LOAD_ADDR;
84     }
85     if (kernel_size < 0) {
86         error_report("Could not load kernel '%s'", kernel_filename);
87         exit(1);
88     }
89 
90     env->pc = entry;
91 }
92 
93 static void an5206_machine_init(MachineClass *mc)
94 {
95     mc->desc = "Arnewsh 5206";
96     mc->init = an5206_init;
97 }
98 
99 DEFINE_MACHINE("an5206", an5206_machine_init)
100