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mac_oldworld: Allow loading binary ROM image

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The beige G3 Power Macintosh has a 4MB firmware ROM. Fix the size of
the rom region and fall back to loading a binary image with -bios if
loading ELF image failed. This allows testing emulation with a ROM
image from real hardware as well as using an ELF OpenBIOS image.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20201017155139.5A36A746331@zero.eik.bme.hu>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
BALATON Zoltan 2020-10-17 17:47:29 +02:00 committed by Mark Cave-Ayland
parent 3e7e134d82
commit 464c73e8eb
1 changed files with 20 additions and 9 deletions
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29
hw/ppc/mac_oldworld.c
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@ -59,6 +59,8 @@
#define NDRV_VGA_FILENAME "qemu_vga.ndrv"
#define GRACKLE_BASE 0xfec00000
#define PROM_BASE 0xffc00000
#define PROM_SIZE (4 * MiB)
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
@ -100,6 +102,7 @@ static void ppc_heathrow_init(MachineState *machine)
SysBusDevice *s;
DeviceState *dev, *pic_dev;
BusState *adb_bus;
uint64_t bios_addr;
int bios_size;
unsigned int smp_cpus = machine->smp.cpus;
uint16_t ppc_boot_device;
@ -128,24 +131,32 @@ static void ppc_heathrow_init(MachineState *machine)
memory_region_add_subregion(sysmem, 0, machine->ram);
/* allocate and load BIOS */
memory_region_init_rom(bios, NULL, "ppc_heathrow.bios", BIOS_SIZE,
/* allocate and load firmware ROM */
memory_region_init_rom(bios, NULL, "ppc_heathrow.bios", PROM_SIZE,
&error_fatal);
memory_region_add_subregion(sysmem, PROM_BASE, bios);
if (bios_name == NULL)
if (!bios_name) {
bios_name = PROM_FILENAME;
}
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
memory_region_add_subregion(sysmem, PROM_ADDR, bios);
/* Load OpenBIOS (ELF) */
if (filename) {
bios_size = load_elf(filename, NULL, 0, NULL, NULL, NULL, NULL, NULL,
1, PPC_ELF_MACHINE, 0, 0);
/* Load OpenBIOS (ELF) */
bios_size = load_elf(filename, NULL, NULL, NULL, NULL, &bios_addr,
NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
/* Unfortunately, load_elf sign-extends reading elf32 */
bios_addr = (uint32_t)bios_addr;
if (bios_size <= 0) {
/* or load binary ROM image */
bios_size = load_image_targphys(filename, PROM_BASE, PROM_SIZE);
bios_addr = PROM_BASE;
}
g_free(filename);
} else {
bios_size = -1;
}
if (bios_size < 0 || bios_size > BIOS_SIZE) {
if (bios_size < 0 || bios_addr - PROM_BASE + bios_size > PROM_SIZE) {
error_report("could not load PowerPC bios '%s'", bios_name);
exit(1);
}