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hw/m68k/mcf5208: Support loading of bios images 

The MCF5208EVB supports 2 MiB of flash at address 0. Add support
for this memory region and some code to load the file that can
be specified with the "-bios" command line option.
This can be used for example to load U-Boot images for the
MCF5208EVB (we still lack some features in the CPU emulation for
this firmware, though, so it can not be run successfully yet).

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
This commit is contained in:
Thomas Huth 2019-02-08 19:33:07 +01:00 committed by Thomas Huth
parent a9d2e3f11c
commit 9f04e1d954
1 changed files with 29 additions and 1 deletions
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30
hw/m68k/mcf5208.c
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@ -27,6 +27,8 @@
#define SYS_FREQ 166666666
#define ROM_SIZE 0x200000
#define PCSR_EN 0x0001
#define PCSR_RLD 0x0002
#define PCSR_PIF 0x0004
@ -227,6 +229,7 @@ static void mcf5208evb_init(MachineState *machine)
hwaddr entry;
qemu_irq *pic;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *rom = g_new(MemoryRegion, 1);
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *sram = g_new(MemoryRegion, 1);
@ -237,6 +240,10 @@ static void mcf5208evb_init(MachineState *machine)
env->vbr = 0;
/* TODO: Configure BARs. */
/* ROM at 0x00000000 */
memory_region_init_rom(rom, NULL, "mcf5208.rom", ROM_SIZE, &error_fatal);
memory_region_add_subregion(address_space_mem, 0x00000000, rom);
/* DRAM at 0x40000000 */
memory_region_allocate_system_memory(ram, NULL, "mcf5208.ram", ram_size);
memory_region_add_subregion(address_space_mem, 0x40000000, ram);
@ -285,9 +292,30 @@ static void mcf5208evb_init(MachineState *machine)
/* 0xfc0a4000 GPIO. */
/* 0xfc0a8000 SDRAM controller. */
/* Load firmware */
if (bios_name) {
char *fn;
uint8_t *ptr;
fn = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (!fn) {
error_report("Could not find ROM image '%s'", bios_name);
exit(1);
}
if (load_image_targphys(fn, 0x0, ROM_SIZE) < 8) {
error_report("Could not load ROM image '%s'", bios_name);
exit(1);
}
g_free(fn);
/* Initial PC is always at offset 4 in firmware binaries */
ptr = rom_ptr(0x4, 4);
assert(ptr != NULL);
env->pc = ldl_p(ptr);
}
/* Load kernel. */
if (!kernel_filename) {
if (qtest_enabled()) {
if (qtest_enabled() || bios_name) {
return;
}
error_report("Kernel image must be specified");